So far the semiconductor industry is outperforming most other manufacturing sectors. Semiconductor capital equipment shipments were up 23% globally in 2Q’20 vs. 2Q’19 and semiconductor chip 3/12 growth is still in positive territory. However there are signs of slowing.

At UES, Inc., our 300 employees faced a myriad of productivity, logistics, and communication challenges as we responded to COVID-19 yet we continued our work uninterrupted to deliver scientific research and technical expertise to the Department of Defense (DoD). We focus on several disciplines including materials science, aerospace power and propulsion, bio and nanoscale technologies, surface engineering, photonic and electronic technologies, additive manufacturing, and product development.UES is also an active member of SEMI Nano-Bio Material Consortium (NBMC), a public-private partnership with Air Force Research Laboratory (AFRL), and has been a part of the organization since its inception in 2013. Dr. Stephaney Shanks, Director of our newest division, Integrative Health and Performance Sciences (IHPS), is currently acting as the NBMC Governing Council Chairperson. IHPS is setting the standard for high-level research in the Air Force Research Laboratory’s 711th (711 Human Performance Wing) and beyond.Its areas of focus include advancing marker discovery in air and biofluids, sensor development, evaluating microbiomes for health and performance, toxicology, industrial hygiene, and high-throughput screening for genetic and chemical exposure. Most of our employees work at the Air Force Research Laboratory (AFRL) at Wright-Patterson Air Force Base, which is offsite of our corporate headquarters and product development labs.Here are some examples of how our COVID-19 response efforts have not only worked, but helped us thrive during this difficult period, enabling us to continue our vital research for the Air Force and our product innovation work in our corporate labs.1. Pursuing Research Projects to Support COVID-19 SolutionsStaffed primarily by scientists and engineers, UES holds a distinct position in supporting the fight against COVID-19. Our entire organization strongly supports finding solutions to the problems brought on by the pandemic to make life safer for everyone.With our AFRL partners and in our UES labs, we pursued new proposals and began projects to combat the pandemic’s problems. We’re developing rapid devices for detection of breath biomarkers that may indicate COVID-19 infection status to provide non-invasive testing capabilities. We are also pursuing point-of-care devices for real-time assessment of COVID-19 outside of the clinical environment, and we are developing models of the protein spikes of SARS-CoV-2 that could be used to further improve detection capabilities.UES also extended active research toward COVID-19 patient transport on cargo aircraft. We have been working with the 711 HPW to develop computational models to evaluate biological agent dispersal in cargo aircraft.UES is conducting research into the biological agent dispersal patterns in cargo aircraft. 2. Enacting an Effective Work-from-Home Policy and FormatBefore the pandemic, most of our employees did not have the option to regularly work remotely. However, by the end of March 2020, UES needed to respond to both DoD and Ohio government orders to stay at home. This presented new challenges. How do we keep laboratory/bench-based staff working? How do we keep all staff mentally engaged while teleworking?As luck would have it, we moved to Office 365 in February. That technology rollout proved to be a significant advantage in our COVID-19 response. Employees maximized their use of Microsoft Teams by sharing files, collaborating, using chat functions, and hosting video meetings. UES also utilized GoToMeeting for larger group meetings and real-time group file sharing/editing.By late March, our management team provided a tracker file in Excel format for all employees to document daily technical progress. This proved to be an excellent method to track projects, monitor staff COVID-19 symptoms or exposure, and record work location as the AFRL and UES labs began to allow small teams to return. This also kept managers in touch with employees on a weekly basis about ongoing work. It not only created extra layers of accountability, but also demonstrated progress and achievements week to week.Microsoft Office 365 has proved its usefulness to UES during the pandemic. 3. Offering Support to Employees and the CommunityThe overall wellness of our employees and the Dayton region is part of our mission at UES. As we resolved logistical issues and reshaped how we collaborated and delivered results, our leadership team began to focus on how to best support employees and our local community. A few activities supported this effort: We provided masks to all employees, along with an informational visual guide for best practices in wearing and caring for a mask. Safety has been a top priority for all employees. We started offering virtual Coffee Talks and Happy Hours. These company-wide online meetings gave employees a chance to reconnect and share concerns. We also shifted our Fitness Classes to an online format. We utilized our social media channels to engage with employees and share resources. We allocated community support to vulnerable populations (food banks and a domestic violence center). UES gave corporate donations, as well as shared non-financial ways to support the community with employees. This pandemic has brought plenty of challenges, but we're impressed by everyone's innovation and resilience. Every UES team member played an active role in adapting, not just to continue their daily work, but to be a part of the solution and support the community.UES used social media to share remote working tips with employees. Dr. Nina Joshi is president and CEO of UES, an award-winning innovative science and technology company based in Dayton, Ohio that provides its government and industry customers with superior research and development expertise, world-class technical support and value-added management services. A unique philosophy emphasizes passion for advancing science, dedication to superior service and commitment to enhancing careers. Contact the company here.

To attract and cultivate new talent across the microelectronics industry, virtual SEMICON West 2020 offered wide-ranging career insights for engineering students seeking that vital first job and young employees embarking on their careers. They learned about overcoming challenges at work and gained a competitive edge by connecting with industry leaders for insider knowledge. These are just some examples of how the SEMI Foundation and the SEMI Workforce Development and Diversity, Equity and Inclusion (DEI) initiatives serve as a springboard to careers in the industry and help close its talent gap.Following are experiences of aspiring engineers at SEMICON West and career lessons presented to help them shape the future of our semiconductor industry.Jump-Starting Careers at SEMICON West 2020More than 600 students from over 50 colleges and universities across the Unites States joined SEMICON West 2020 to jump-start their careers in the semiconductor industry. With free access to SEMI’s first virtual expo, they connected with recruiters and companies in the exhibit hall, and sponged up insights from speakers about digital internships, job opportunities, and key trends shaping the digital future.“It was almost overwhelming,” said Jason Wong, 20, a junior at San Jose State University working toward an advanced degree in mechanical engineering. “It was kind of like an engineering student’s dream for contacts and knowledge all on one platform.”Wong visited about 15 booths in the online exhibit hall to speak with company representatives about his field of interest – microelectromechanical systems (MEMS).“MEMS is a pretty niche area, so it was really surprising how many companies were there in this category alone,” Wong said.Through the expo’s chat tool, Wong made some solid contacts and has followed up with several engineers via email, LinkedIn and Zoom meetings, cultivating what he believes will be “some long-lasting and valuable connections.”“I’m not really looking for a job at the moment, but I hope to get an internship at some point,” Wong said. “With the current (COVID-19) outbreak, a lot of events with opportunities to interact are no longer available, so this was an enlightening and useful experience for me I plan to attend again.”On the other side of the country in Virginia, Devayani Pawar, 23, found it easy to network at SEMICON West. She especially appreciated the free pass for students and practical sessions in the Smart Workforce Pavilion tailored to help early-career job seekers find opportunities, build contacts, and polish resumes.She was drawn to the Smart Manufacturing Pavilion because of her skills and interests in toolmaking and wafers.“I understand manufacturing and it’s a hot field right now,” said Pawar, who recently earned her master’s degree in data science from George Mason University. “It’s interesting to me how such tiny components can do so much powerful work.”“A lot of people my age aren’t very aware of the microchip industry – they’re mostly focused on information technology and companies like Google, Amazon, or Facebook,” Pawar said.After landing an internship at Micron Technology analyzing wafers and working in clean rooms, she was wowed by the potential of nanotechnology. Pawar learned about the strong demand for data scientists in semiconductor manufacturing. After making connections at SEMICON West and absorbing information, she now has a better handle on career opportunities.“The recruiters and other contacts I made have been so responsive, and now I have a better understanding of use cases and what companies are seeking,” she said.A Day in the Life of an EngineerRight after college in 2017, Erika Gabrielle Hansen joined Applied Materials as an engineer. She told management she wanted to travel, learn about the “big picture” behind the company’s products, and work with customers.In her presentation A Day in the Life of an Engineer at the SEMICON West Smart Workforce Pavilion, she recalled a whirlwind of unforeseen opportunities, soul-searching challenges, and the rewards of personal, professional, and community growth. She also candidly shared lessons learned about pride, collaboration, and resilience.Her journey began when she had the opportunity to share her aspirations for her at career at Applied and landed a dual role as a process engineer and customer account technologist.In her job as a process engineer, Hansen puts her materials engineering degree from Cal Poly, San Luis Obispo to good use analyzing data, solving technical problems, developing new processes to meet customer requirements, and working with cutting-edge technologies. At one moment she might be in a clean-room laboratory wearing a bunny suit doing hands-on work with tools. In another, she could be videoconferencing with hardware, software, and systems engineers worldwide, or preparing a report for upper management.“I was very nervous at first as a process engineer,” Hansen said. “I was the only person in my group who didn’t have a Ph.D. and tried to compensate for that by doing things on my own and not asking for help.”After making a few mistakes, she began to turn to her team for their expertise and sharing the results of her work – both good and bad – with them.“Having humility to ask for help and not let pride get in the way was a huge learning point for me,” she said.As a customer account technologist, she has made a dozen trips to customer sites in four countries to implement new processes or resolve technical issues. By seeing tools in action, she now has what she calls a “whole picture” perspective on their effectiveness, while enjoying the camaraderie of colleagues and sampling local cuisines, sites, and scenes around the world.At one point, she was assigned to lead an international team to resolve an issue with a major customer – her greatest challenge yet and her first time in such a role. She struggled to overcome language barriers and eventually told her boss she might not be the best person to lead the project. He promised to provide more support, and her team went on to resolve the customer’s problem.“I picked myself up, reached out to people with international experience, and changed my communication style,” Hansen said. “I learned it’s okay to be uncomfortable, to flex my leadership style, and be resilient, which is a learned skill.”Building a Better Network: Crucial ConnectionsAndrew Carnegie, one of history’s richest industrialists and most generous philanthropists, said 85 percent of a person’s success is based on “interpersonal relationships” and “abilities to be a human being.” Professional skills account for just 15 percent of success.While advancing to her current role as Chief Marketing Officer for FormFactor, Amy Leong found this advice critical to her career trajectory. Just like the challenge of raising a strong family, building a successful career “takes a village… you can’t do it alone,” she said in her Smart Workforce Pavilion presentation Building a Better Network: Crucial Connections.Outperforming expectations might be essential early in one’s career to get promotions, raises, and the attention, but that mindset goes only so far.“As seniority levels increase, people already know you’re a phenomenal performer and expect nothing less,” Leong said. “So, the higher you go the more vital it is to spend almost a disproportionate amount of effort on building relationships.”Building your network isn’t about the quantity of one’s business cards or LinkedIn connections; it’s about building quality relationships with mutual benefits over the long run.“We need to be smart about return on investment when building our professional network,” she said. “You help me, and I help you. It’s win-win horse trading.”And the most important factor in career success? For Leong, a strong family foundation has mattered most.“Family comes first,” said Leong, who has twin teenagers. “Take care of the ones you love. Check in with your family whenever you can. Family relationships are bound by blood. Thanks to my retired parents and a helpful husband, we tough it through.”She reemphasized the importance of mutually beneficial relationships, noting “A rising tide will lift all boats.”Fostering Talent for the Industry’s FutureDeveloping young talent and future leaders in microelectronics stands as a persistent and growing need – and a critical challenge to realizing expected growth. Emerging technologies such as artificial intelligence, quantum computing, and augmented/virtual reality are expected to impact a huge range of markets, leading to projections that the semiconductor industry will double in size in the next 10 to 15 years.The opportunities for growth and technologies that promise to improve the quality of human life worldwide are breathtaking. The industry’s talent pool will need to scale accordingly, magnifying the importance of expanding industry-wide programs such as the Workforce Development and DEI initiatives that the SEMI Foundation are building. Learn more about how you and your company can get involved with these initiatives on the SEMI Foundation website.Shari Liss is executive director of the SEMI Foundation. She oversees SEMI Workforce Development programs from K-12 through re-skilling for veterans.

Internships provide a wealth of benefits for students and corporate managers as they work side-by-side in a real-world environment. Students gain practical, hands-on experience and employers get an infusion of fresh energy, diverse ideas and eager talent.The full value of an on-site internship – the ultimate job interview – flowers when it leads to full-time employment.That was before “everything went crazy,” said Tina Revels, university relations manager at KLA, during her Smart Workforce Pavilion presentation The New Reality: Digital Internships at the virtual SEMICON West 2020. Today, amid COVID-19 restrictions, everyone must adjust to a new reality – a virtual reality. Part of this substantial shift has led to internships going digital.“Internships are more important than ever as we shift to a virtual reality,” Revels said, explaining how today’s job seekers and companies alike can make sure digital internships sustain the same mutual benefits as traditional ones.At companies turning to digital internships, managers need to do more upfront planning to re-create real-world experiences that make interns “feel engaged and connected with one another,” Revels said. For prospective interns, digital internships require greater independence, self-management discipline, and responsibility than traditional internships – all critical skills that can lead to permanent employment.Watch Revels’ full presentation below to learn how to get the most out of digital internships. Register for virtual SEMICON West 2020 to access the additional Smart Workforce and Diversity, Equity and Inclusion sessions, which covered dynamic topics such as job searches during uncertain times, creating a culture of inclusivity, supplier diversity, and hiring military veterans. The content is available until September 20, 2020.Learn more about the SEMI Foundation and how its Workforce Development and Diversity, Equity and Inclusion initiatives are helping build the electronics manufacturing and design supply chain’s talent pipeline.Bryson Gauff is program manager for SEMI High Tech U.

Japan’s semiconductor industry has weathered the COVID-19 pandemic to post robust growth. Far from a temporary setback, COVID-19 will lead to enduring change in how we work and live. And just as automation has been a bulwark against the devastating business impacts of the virus outbreak, increasing digitization will lead to new efficiencies in our industry.These were some of the key takeaways from three SEMI Japan Members Day webinars in June and July that offered the latest updates on COVID-19 impacts to the semiconductor industry and restart strategies for SEMI members. More than 2,000 SEMI members across Japan’s islands attended the webinars featuring the following five speakers: Hideki Kanewaka, Marketing Director, Consulting Lead, Japan, Accenture Japan Ltd. Takayuki Komori, Manager, Marketing Engineering Dept, SUMCO Corporation Taketoshi Hamaguchi, Director, Manufacturing Industry, Microsoft Corporation Akira Minamikawa, Senior Consulting Director, OMDIA (Informa Intelligence LCC) Yuichi Koshiba, Managing Director Partner, Boston Consulting Group COVID-19 Impact on Japan Semiconductor Industry is ModestThe consensus view of the five speakers from various quarters of the industry – consultant, IT service provider, materials supplier, market analyst – was that the Japan semiconductor industry withstood the heavy blows COVID-19 dealt to other industries thanks to strong demand for chips. Shelter-in-place policies and lockdowns spawned by COVID-19 has accelerated the digital transformation rippling around the world as electronics sales have soared to support everything from remote work and education to healthcare and home entertainment including gaming.The rapid growth of cloud usage for video streaming, gaming and remote work is taxing communications network capacity and placing more bandwidth demands on servers, said Akira Minamikawa of OMDIA. According to a recent report by Nokia, communications network traffic has skyrocketed 300 percent for online meetings and 400 percent for gaming, bringing the networks closer to their capacity limits. Minamikawa sees server shipments increasing at 8 percent CAGR through 2024. For the broader chip market, he expects demand for notebooks, solid state and hard disk drives, and gaming to remain strong in 2020. He also predicts rapid 5G penetration for smartphones will boost semiconductor chip industry growth.Still, not all semiconductor segments are expanding, said Yuichi Koshiba of Boston Consulting Group. Chip shipments for end products in markets such as automotive, industrial equipment and aircrafts are on the decline. Slowing demand for chips that power automotive applications in particular could pare sales for some chip companies and distributors since the segment accounts for a high proportion of their overall revenue.State of the Semiconductor IndustryFrom SUMCO’s vantagepoint as a major silicon wafer supplier, the company’s Takayuki Komori sees a number of changes unfolding in the semiconductor industry: Smartphones are driving growing demand for process technology (smaller nodes) and 300mm wafers. Komori estimates the typical high-end smartphone sports 1,700 square millimeters of silicon. 300mm wafers account for 80 percent of that total while more than 50 percent of the devices use leading edge multi-patterning technologies. Smartphones will need more RF chips to support 5G’s high-speed communications and added frequency ranges. Substrates for RF switches and tuners have been shifting from gallium arsenide (GaAs) and other compound semiconductors to silicon. 5G smartphone penetration will accelerate as the cost of integrating CPUs and modem functions into a single chip sees a swift decline. While the sensitivity and resolution of CMOS image sensors have evolved to incorporate innovative backside illumination and stacking technologies, future advances will focus more on products for machine vision applications capable of sensing invisible light bands. Rising adoption of electric vehicles and robotics applications will drive growing demand for power semiconductors that control their motors such as IGBTs and MOSFETs as the production capacity for the devices expands and shifts to 300mm wafer lines. For memory fabs, Minamikawa said utilization remains high as a result of a spending slowdown by major chip manufacturers and will stay elevated even once additional capacity ramps to support robust demand. Foundry fab utilization also remains high despite the pandemic-driven cancellation of smartphone chip orders in March. Minamikawa also sees the utilization rate of micro rising with the surge in demand for notebooks, PCs and servers in the second half of 2020.Transition to New NormalAs people around the world start to settle into new ways of living and working, there’s a growing acceptance that the transformation will be long-lasting. And no area of people’s lives is changing more than their work. Boosted by government subsidies, many small and midsize companies in Japan have started to implement work-from-home policies, an area where major electronics and IT businesses had already instituted reforms, said Hideki Kanewaka of Accenture. A few examples: Nippon Telegraph and Telephone Corporation (NTT) announced that half of its employees will continue to work from home in the future. A five-year plan Toshiba launched in 2019 to allow all employees to work from home will likely accelerate. Hitachi plans to allow all employees to work from home starting in April 2021. dwango, a major internet-based entertainment company in Japan, announced it will allow in principle any employees to work remotely. In the critical area of remote sales, Kanewaka pointed to the importance of going beyond online business meetings, paperless transactions and virtual events to devise new ways to attract customers and close deals. Creating online communities and providing rich digital content are also important measures to consider, he said.Manufacturing's Digital TransformationTravel restrictions by most countries to curb the COVID-19 outbreak have also raised barriers to chip companies sending engineers overseas sites to service state-of-art equipment and provide other technical support. Microsoft’s remote assist system deployed by ASML is one tool semiconductor makers can use to overcome this challenge, said Taketoshi Hamaguchi of Microsoft.The system connects a remote equipment service expert with an onsite worker through the internet, allowing the technical expert to provide support through a goggle display with a camera worn by the worker. Guided by the expert, the worker can perform complex services. A Natural User Interface (NUI) helps give the factory worker a clear understanding of the often highly technical instructions.Using artificial intelligence (AI) to increase automation will also help reduce the reliance of semiconductor factories on onsite workers. For example, AI deep learning can be deployed to calibrate equipment autonomously and reduce downtime after scheduled maintenances, Hamaguchi said.Corporate Restart Strategies Beyond factory considerations tied to COVID-19, semiconductor companies will need to adapt their business strategies to new ways of operating. For example, global supply chains will shift to domestic sources and increase redundancy to ensure a steady supply, a change leading to higher overall costs, Koshiba said. Trade routes among regions will also be redrawn as the trade rift between the United States and China and other geopolitical tensions intensify. The total value of those routes is expected to recover by 2023.Koshiba advised companies to evaluate the supply chain trade-offs between stability and cost and factor in potential risks to improve their short-term resilience and drive mid- to long-term supply chain restructuring.After past recessions, 14 percent of companies restored sales growth, Koshiba said. He recommended investing aggressively in growth and seizing M A opportunities during the downturn. Chip companies must also adapt to supply chain changes faster than competitors.Become a SEMI MemberWebinars like the recent SEMI Japan Members Day series have become increasingly important in the mix of programs and services SEMI offers members to help them connect, collaborate and innovate in the microelectronics community. To become a SEMI member, please visit the SEMI website or contact your nearest SEMI office.Jim Hamajima is president of SEMI Japan.

COVID-19 has forced all the players in the semiconductor manufacturing supply chain to reassess how much inventory they need to hold.

Tracking and quickly diagnosing COVID-19 infections, working from home and telemedicine recently came into sharp focus as technology executives and other subject matter experts from microelectronics heavyweights recently gathered for the first-ever virtual SEMI CTO Forum to explore how the microelectronics industry and their own companies can leverage future technology trends to drive growth. Themed Intelligent Medtech and Wearable Technologies, the forum drew CTOs from ARM, Babblelabs, Brewer Science, Dell, Dow/Dupont, E-Ink, Hewlett Packard Enterprise, Intel, Lam Research, KLA, Microchip, ON Semiconductor, Qualcomm, Tokyo Electron, Ulvac, Veeco and Xilinx. The event is designed as a strategic driver of pre-competitive innovation. Following are key takeaways from the forum. Microfluidics Promises to Speed COVID-19 Diagnosis More than 240 companies worldwide are developing microfluidics solutions to improve diagnosis and treatment of COVID-19 and other conditions, said forum speaker Dr. Kurt Petersen, a member of Band of Angels, Silicon Valley's oldest angel investment group, with an illustrious background1 in technology. And their innovations are bearing fruit. Cepheid, a company founded by Dr. Petersen, has developed a disposable microfluidic cartridge, Xpert Xpress SARS-CoV-2, used by doctors to swab the inside of a patient’s mouth. Highlighting the vital role of MEMS in medical electronics, the tiny powerful devices are behind a test that can detect COVID-19 infection in under 40 minutes. Dr. Petersen also cited a few examples of implantables and injectables under development, including: In vivo chemical sensing: Profusa developed a continuous glucose monitoring sensor via an optical patch. Glaucoma pressure monitors: Injectsense built a silicon chip the size of a grain of rice that is embedded in the eye to measure eye pressure. Retinal implants: Second Sight implanted a 60-electrode array chip that projects images onto the retina to improve vision. Microelectronics Takes Aim at Battling COVID-19 The event’s CTO roundtable, a platform for discussing societal and technology issues, revealed microelectronics technology will likely give rise to solutions for combatting pandemics and new business opportunities both in the short and long run. Areas of the greatest interest included: Tracking and Security: Infection tracking accuracy is key to limiting the spread of viruses yet comes with inherent privacy and security challenges. The consensus view of the executives was that developing trusted hardware capabilities is critical for adoption of accurate infection-tracking technologies. Remote Operation: Executives expect working from home or the use of telehealth to continue building momentum long after pandemic. To give staying power to the remote communications at the heart of these trends, microelectronics ecosystems will need to boost compute performance, both at the edge and in the cloud, while increasing bandwidth to enable applications such as augmented reality/virtual reality (AR/VR), artificial intelligence (AI), machine learning and advanced data analytics. Edge intelligence: The challenge of remote communications spans both people and the Internet of Things (IoT). Questions persist about how hundreds of billions of sensors will connect to the cloud and how much power they will consume. The need to push computing to where data is generated – at the edge – is rising and the necessary underlying technologies will only come by combining various forms of distributed computing and analytics. The microelectronics industry’s ability to seize these opportunities will only be possible with huge strides in innovation, raising concerns among the CTOs about the financial viability of cutting-edge devices because of increasing device complexity and R D costs. Technology partnerships and collaborations – an area where SEMI is contributing and will continue to expand its efforts as it works with the CTO community – will be critical to containing R D costs. SEMI will help the executives identify and mobilize the resources key to future innovation. Improving Home, Work Productivity and Experiences Key to AR Adoption Smart wearables also offer great promise. In just over a decade, AR and VR have grown from science fiction to practical uses such as AR applications for smart contact lenses, said Dr. Mike Wiemer, Co-Founder and CTO of Mojo Vision2. Dr. Wiemer said that while many AR applications remain under development, the technology will only see widespread adoption once it starts to improve productivity and efficiency at home and work and the quality of other experiences. The smart augmented reality contact lens developed by Mojo Vision is a step in that direction. The product’s built-in display gives users timely information about everything they see while remaining invisible by packing 70,000 pixels into a space smaller than a half a millimeter across, making it the smallest and densest dynamic display ever made. The contact lens is powered by an ARM-based processor, with later versions adding an image sensor, eye-tracking sensors and a communications chip. SEMI thanks EMD Performance Materials and Telit for sponsoring the CTO Forum. For more information on the CTO Forum and SEMI’s Smart Data-AI initiative, please sign up on our webpage. 1 Dr. Kurt Petersen is a member of the National Academy of Engineering, an IEEE Medal of Honor winner, and a Life Fellow of the IEEE for his contributions to the commercialization of MEMS technology. 2 Dr. Wiemer also co-founded Solar Junction, where he led technical teams to two world records in solar cell efficiency (43.5% and 44%). He also has patents and papers in Semiconductor Devices Applications, Silicon Photonics, Materials Integration, Lasers, Solar Cells, Solar Systems, and Analog Circuits. Tom Salmon is Vice President of Collaborative Technology Platforms at SEMI. Pushkar P. Apte, Ph.D., is Strategic Technology Advisor for the Smart Data AI Initiative at SEMI.

Why do we need environmental air pollution sensors?Today we need environmental air pollution sensors more than ever to ensure that we have clean and safe outdoor and indoor air. Although federal rules have improved air pollution over the past several decades, more than 110 million Americans still live in counties where air quality is below national standards. An estimated 100,000 Americans die prematurely each year of illnesses caused or exacerbated by polluted air.“Cars and trucks are much cleaner than they were, power plants are cleaner, industrial operations are cleaner,” said Paul Billings, Senior Vice President Advocacy for the American Lung Association. But cleaner air is not clean air.”While scientists have long known that air pollution may exacerbate asthma and other respiratory illnesses, new data suggests polluted air leads to higher COVID-19 higher death rates and brain inflammation that can contribute to dementia and autism.To understand the importance of air quality and how we can apply existing sensors and develop new ones, we look both outdoors and indoors (see Figure 1). Outdoor air quality relates to gaseous and particulate pollutants, defined by the Air Quality Index (AQI). The AQI became a standard based on regional thresholds for a set of key outdoor pollutants: four gaseous pollutants (sulfur dioxide, nitrogen dioxide, carbon monoxide, ozone) and particulates (PMs) of different sizes such as 10 μm (PM10) and 2.5 μm (PM2.5). At present, the AQI is measured using traditional analytical instruments. Despite their high acquisition and maintenance costs, these instruments are the only solution to accurately measure these pollutants in the presence of variable environmental background.Figure 1. Examples of outdoor and indoor air quality markers Indoor air quality (IAQ) is also of growing concern. Formaldehyde, benzene, carbon monoxide, and carbon dioxide are some of the key pollutants with restricted concentration levels in residential, office and industrial buildings. Sources of these and other gaseous pollutants include building materials and equipment, workplace cleansers, and building occupants. Regulatory agencies and building occupants use different methodologies to estimate IAQ using gaseous and particulate pollutant analyzers. These estimates also consider air humidity and temperature that affect indoor air quality. Where are we today with environmental sensors?The top three requirements for modern gas sensors include: the sensor reliability to provide accurate readings in diverse environmental conditions over desired period of use low power, to extend battery life or to eliminate its need, and low cost, to facilitate their ubiquitous deployments. Advances in electronics, microfabrication, and packaging have delivered recent important developments in reducing the power consumption and miniature packaged solutions. Recent R D efforts are also increasing the number of successful gas sensor field deployments for outdoor and indoor air quality monitoring. Figure 2 illustrates three examples of recent developments in gas sensors that meet requirements of diverse customers.Electrochemical sensors from SPEC Sensors were collocated with EPA instruments for monitoring of NO2 and O3 in Chicago’s Array of Things Project. Figure 2A shows that these new cost-effective sensors track well the EPA instruments. Advancements in circuit quality, sampling, enclosure design, and initial calibration/compensation were all essential in achieving these results. While this example clearly demonstrates the usability of these sensors in this particular application, the expectations that low-cost, off-the-shelf sensors will match the performance of EPA reference systems that cost 50x-100x more must be adjusted. A micropackaged sensor suite from Bosch Sensortec includes sensors for total volatile organic compounds (TVOCs), temperature, humidity, and pressure. TVOC measurements are needed according to the guidelines by the German Federal Environmental Agency. To report TVOC, the sensor algorithm tracks the TVOC-related resistance of the metal oxide sensor, corrects sensor resistance for ambient temperature and humidity, and outputs the TVOCs Index of Air Quality between 0 (clean air) and 500 (heavily polluted air) as shown in Figure 2B. A recent GE-developed dielectric excitation scheme of metal oxide sensing materials provided a highly desired and long-awaited calibration stability of sensors for monitoring of fugitive methane gas emissions in all-weather conditions. These sensors were used in several field validation campaigns in Oklahoma, North Dakota, Arkansas, and British Columbia and had stable performance after more than 400 days, as compared to an initial calibration (see Figure 2C). Such stable sensor performance has become possible by switching from the conventional resistive mode of operation of metal oxide sensing elements to the dielectric excitation scheme. Figure 2. Examples of applications of contemporary gas sensors based on different detection principles.(A) Outdoor performance of NO2 and O3 electrochemical sensors versus EPA-validated instruments.(B) Calibration results of a BME680 metal oxide gas chemiresistor upon exposures to TVOCs (blue stair-profile) and its ± 15% confidence interval band as the Index of Air Quality.(C) Calibration stability of a sensor with an innovative dielectric excitation scheme implemented for monitoring of fugitive methane gas emissions after multiple uses in diverse field validation campaigns. Key challenges and solutions toward realizing new applicationsIn this era of data-on-demand, environmental sensors could enable countless new applications. Imagine you have a gas sensor conveniently integrated into a smartphone or a watch. You are commuting to work, and your sensor alerts you that the subway station through which you are traveling has very poor air quality. How might this alert affect your behavior? Would you put on a mask, change your commuting route to a twice-longer one, or petition the city? What if you are attending a parade downtown with your asthmatic child, and your device informs you that the air is clean? Would you skip the parade if you knew that your sensor was only 10% accurate? How would you avoid a risk of ending with your asthmatic child in a hospital?Design principles of modern sensors originate in the 20th century for detection of high gas levels from leaks, but they did not anticipate the applications proposed now. By design, existing sensors have only a single output – e.g. resistance, voltage, current, light intensity – that mathematically cannot correct for the sensor instabilities caused by the complex chemical background and variable temperature and humidity conditions. Thus, often these simple sensors perform best when pollution levels are high and when the compound of interest swamps others. As a practical example, there are dozens of gaseous pollutants in ambient air with their toxicity that differ 1,000-10,000 fold. Often, the insufficient reliability and accuracy of existing sensors in the field conditions is a significant bottleneck toward the broad adoption of gas sensors. According to the United States Environmental Protection Agency (EPA), the correlation between readings of low-cost sensors versus reference monitors varies widely from 1% to 80%. The EPA also states that no low-cost sensors meet Regulatory Monitoring requirements, and the World Meteorological Organization emphasizes that “low-cost sensors are not currently a direct substitute for reference instruments, especially for mandatory purposes.” However, we now have the increasing number of examples of reliable operation in complex environments (Figure 2) in addition to important advances in reduced power and size of contemporary sensors. Still, the key challenges to realize new applications are often the lack of required accuracy and reliability of available sensors for new contemplated applications.Is it possible to offer low-cost sensors for at least some applications and some gases with the degree of accuracy approaching more expensive specialized instruments? We, the SEMI-MSIG Device Working Group, are saying: Yes. To deliver on this bold statement, our SEMI community brings new technological solutions to the 100-year old general design of gas sensors.Our next blog What is in the Air will provide details on our activities of SEMI-MSIG Device Working Group to establish standards and new measurement schemes to reduce effects from uncontrolled ambient conditions and to improve stability, limit of detection, and dynamic range of environmental sensors. Also learn how new MSIG members can impact this important working group. The MEMS Sensors Industry Group (MSIG) is a SEMI technology community that enables the MEMS and sensor industry to address common challenges, innovate and accelerate business results.Radislav A. Potyrailo is Principal Scientist, Micro Optoelectronics Gas-Chem-Bio Sensors Systems, at GE Research; Ed Stetter is General Manager at SPEC Sensors, LLC; Ryotaro Sakauchi, is Senior Manager of Business Development at Bosch Sensortec; Merry Smith is a Product Manager and Senior Scientist at C2Sense, Inc.; and Sreeni D. Rao is Senior Director of the MEMS Business Group at TDK Corporation.