1-micron-thick Sensor Sheet Announced at Conference

Feb 4, 2014
Tsuneyuki Miyake, Nikkei Electronics
An image of the 1-micrometer-thick sensor (photo courtesy of Takao Someya, professor at the University of Tokyo)
An image of the 1-micrometer-thick sensor (photo courtesy of Takao Someya, professor at the University of Tokyo)
[ If it clicks, the expanded picture will open ]

Takao Someya, professor at the University of Tokyo, delivered a keynote speech titled "Bionic Skins Using Flexible Organic Devices" at IEEE MEMS 2014, which took place from Jan 26 to 30, 2014.

It was one of the four invited lectures at the conference and about the technology of forming a large-area sheet based on organic materials and its potential.

In the lecture, Someya stressed the importance of the large-area device and introduced a 1μm-thick sheet, which was thinner than before. It is expected to be attached to a human body surface and measure an electromyogram (EMG), etc. He explained the details of an electrode sheet formed on a PEN (polyethylene naphthalate) film in a matrix pattern as well as the details of an amplifier sheet that amplifies signals collected on a body surface.

Someya considers that it is possible to accurately know the state of a user by continuously measuring the user's EMG. If conventional silicon (Si)-based compact sensors are used for measurement at "points" on a body surface, its results might differ depending on the points and measuring time, making it impossible to obtain accurate data.

With measurement of an "area," it is possible to reduce dispersion and improve the accuracy of continuously measured values, making the data valuable to applications.