Section adopted polymer coated micro-bridge type pressure sensor for low power electronic nose

Section adopted polymer coating of micro-pressure sensor bridge (microbridge), it can detect absorption in its chip array of gas concentrations.

One can detect asthma, lung cancer, kidney disease and other health issues in low-power electronic nose that is through the use of this technology can be realized. Of IMEC and Belgium Netherlands of Holst Centre has successfully developed a gas detection, integrated sensing components. This is already publicly perform technology with low power consumption (< 1 MW/bridge) and overall dimensions of the small advantages.

As a diagnostic tool to detect chemical and gas composition of wireless sensor nodes is rapidly attracted people's attention.

The electronic nose can be used in non-designated environment, through its multiple sensor receiving body to detect gas composition.

A complete sensor chips in electron micrograph of scanned images.

Through the use of specific cross-layer, the close of the respective vibration emitted by bridge-type resonator can be used to isolate different gases (to identify the gas composition).

Upgrade the current technology (such as chemical resistance or quartz crystal) requires very high power.

And IMEC and Holst Centre, joint development of micro-bridge type pressure sensor can be embedded in a high density of the piezoelectric motor. The design uses inkjet printing technology to a wide range of absorbent quickly to the various micro-bridge type pressure sensor. Suspended structure in oscillation vibration and occurred during the change, a phenomenon that is monitoring for gas to be measured has been absorbed. Because the structure has a high-thickness ratio of length, so the request is detected by a low concentration of gases in gas. Full sensor chip size 9 × 9 mm and consists of 160 miniature discrete addressable electromechanical Resonators, its aspect ratio (length/depth) in the range 140 ~ 1500.

The team's next goal is to the structure and low power analog read circuit integration and multiple simultaneous measurement of structure.