Flexible Thinking: The Key to a Successful Flex Circuit Design Transfer
Happy’s Tech Talk #29: Bend-to-Install Semi-flex FR-4
Tuning Flexible Circuits with Light
September 22, 2021 | Osaka UniversityEstimated reading time: 1 minute
Researchers from SANKEN (The Institute of Scientific and Industrial Research) at Osaka University and JOANNEUM RESEARCH (Weiz, Austria), have shown how exposing an organic polymer to ultraviolet light can precisely modify its electronic properties. This work may aid in the commercialization of flexible electronics that can be used for real-time healthcare monitoring, along with data processing.
While the integrated circuits inside your smart phone are quite impressive, they lack certain important features. Because the electronics are silicon based, they are very rigid, both in the literal sense of being inflexible, as well as having chemical properties that are not easily altered. Newer devices, including OLED displays, are made from carbon-based organic molecules with chemical properties than can be tuned by scientists to produce the most efficient circuits. However, controlling the characteristics of organic transistors usually requires the integration of complex structures made of various materials.
Now, a team of researchers led by Osaka University have used UV light to precisely change the chemical structure of a dielectric polymer called PNDPE. The light breaks specific bonds in the polymer, which can then rearrange into new versions, or create crosslinks between strands. The longer the light is on, the more the polymer get altered. By using a shadow mask, the UV light is applied to just the desired areas, tuning the circuit behavior. This method can pattern transistors of the desired threshold voltage with high spatial resolution using just a single material.
“We have succeeded in controlling the characteristics of organic integrated circuits using persistent light-induced changes in the molecular structure itself,” study corresponding author Takafumi Uemura explains.
In the future, we may see smart versions of almost everything, from medicine bottles to safety vests. “Meeting the computational demands of ‘the Internet of Things’ will very likely require flexible electronic solutions,” senior author Tsuyoshi Sekitani says. In particular, this technology can be applied to manufacturing methods for ultra-lightweight wearable healthcare devices.
Read the original article, here.
Share on:
Suggested Items
Flexible Thinking: The Key to a Successful Flex Circuit Design Transfer
03/26/2025 | Joe Fjelstad -- Column: Flexible ThinkingThis month, I will discuss the most common design errors that fabricators see, typical areas of miscommunication between design and fabrication, and what designers can do to avoid putting their jobs on hold. This is no simple task, given the many things that can go wrong in flex circuit manufacturing, but many of these issues originate in the design process.
Flexible Thinking: Flexible Circuit Technology—Looking Back and Forward
03/03/2025 | Joe Fjelstad -- Column: Flexible ThinkingFlexible circuit technology came on the scene as a solution largely for niche applications, however, the technology has emerged in recent years as a cornerstone of modern electronics. Today, the technology is enabling a broad range of new product designs across industries. From wearable devices and medical implants to foldable smartphones and numerous automotive applications, flexible circuits are arguably at the heart of much of the next generation of innovations.
Pusan National University Develops One-Step 3D Microelectrode Technology for Neural Interfaces
02/28/2025 | PRNewswireNeural interfaces are crucial in restoring and enhancing impaired neural functions, but current technologies struggle to achieve close contact with soft and curved neural tissues. Researchers at Pusan National University have introduced an innovative method—microelectrothermoforming (μETF)—to create flexible neural interfaces with microscopic three-dimensional (3D) structures.
Growth and Innovation at FCT
02/26/2025 | Marcy LaRont, I-Connect007During DesignCon, I met with Tony Plemel, senior applications engineer at Flexible Circuit Technologies (FCT), to discusses the company’s growth and expansion opportunities, including its expansion of its inTFlex EMS facility. In this interview, Tony explains how FCT’s commitment to customer service and focus on communication and responsiveness allow the company to leverage its capabilities for continued expansion.
CEE PCB Appoints Markus Voeltz to Business Development Director Europe
02/12/2025 | CEE PCBCEE PCB, a leading manufacturer of printed circuit boards (PCBs) and flexible printed circuits (FPCs) with 3 production facilities in China, is expanding its presence in Europe and will offer local support starting March 2025.