Team Builds Flexible New Platform for High-Performance Electronics
September 29, 2017 | University of Wisconsin–MadisonEstimated reading time: 1 minute
A team of University of Wisconsin–Madison engineers has created the most functional flexible transistor in the world — and with it, a fast, simple and inexpensive fabrication process that’s easily scalable to the commercial level.
It’s an advance that could open the door to an increasingly interconnected world, enabling manufacturers to add “smart,” wireless capabilities to any number of large or small products or objects — like wearable sensors and computers for people and animals — that curve, bend, stretch and move.
Transistors are ubiquitous building blocks of modern electronics. The UW–Madison group’s advance is a twist on a two-decade-old industry standard: a BiCMOS (bipolar complementary metal oxide semiconductor) thin-film transistor, which combines two very different technologies — and speed, high current and low power dissipation in the form of heat and wasted energy — all on one surface.
As a result, these “mixed-signal” devices (with both analog and digital capabilities) deliver both brains and brawn and are the chip of choice for many of today’s portable electronic devices, including cellphones.
“The industry standard is very good,” says Zhenqiang (Jack) Ma, the Lynn H. Matthias Professor and Vilas Distinguished Achievement Professor in electrical and computer engineering at UW–Madison. “Now we can do the same things with our transistor — but it can bend.”
Ma is a world leader in high-frequency flexible electronics. He and his collaborators described their advance in the inaugural issue of the journal npj Flexible Electronics, published Sept. 27.
Making traditional BiCMOS flexible electronics is difficult, in part because the process takes several months and requires a multitude of delicate, high-temperature steps. Even a minor variation in temperature at any point could ruin all of the previous steps.
Ma and his collaborators fabricated their flexible electronics on a single-crystal silicon nanomembrane on a single bendable piece of plastic. The secret to their success is their unique process, which eliminates many steps and slashes both the time and cost of fabricating the transistors.
“In industry, they need to finish these in three months,” he says. “We finished it in a week.”
He says his group’s much simpler high-temperature process can scale to industry-level production right away.
“The key is that parameters are important,” he says. “One high-temperature step fixes everything — like glue. Now, we have more powerful mixed-signal tools. Basically, the idea is for flexible electronics to expand with this. The platform is getting bigger.”
Suggested Items
I-Connect007 Editor’s Choice: Five Must-Reads for the Week
05/03/2024 | Nolan Johnson, I-Connect007This week’s most important news is strategic—and telling. When one puts together the IPC industry reports, we simply have to include the recent conversation with Shawn DuBravac and Tom Kastner. On the design side, check out the latest “On The Line With…” podcast featuring Brad Griffin from Cadence Design Systems, discussing SI and PI in the realm of intelligent system design.
IMI Welcomes New CEO
05/03/2024 | IMIIntegrated Micro-Electronics, Inc. (IMI),The IMI Board of Directors announced, in a disclosure dated April 25, 2024, the appointment of Louis Sylvester Hughes, Chief Executive Officer (CEO).
Electronics Industry Sentiment Rose in April, Hitting New High
05/02/2024 | IPCApril 2024 marked the third consecutive month of sentiment growth among electronics manufacturers. When asked if they expected labor costs for hourly workers to rise over the next month, manufacturers in the United States, Mexico, and Europe predicted a five percent increase, while manufacturers in Asia predicted a slightly lower four percent increase.
iNEMI Names Grace O'Malley CTO
05/02/2024 | iNEMIThe Board of Directors of the International Electronics Manufacturing Initiative (iNEMI) has named Grace O'Malley Chief Technical Officer (CTO).
ZESTRON Academy Launches 2024 Advanced Packaging & Power Electronics Webinar Series
05/01/2024 | ZESTRONZESTRON, the leading global provider of high-precision cleaning products, services, and training solutions in the electronics manufacturing and semiconductor industries, proudly announces the launch of its highly anticipated webinar series on Advanced Packaging & Power Electronics, a webinar series on the latest innovations, cleaning, and corrosion challenges.