We have developed a diaphragm piezoelectric microactuator. The diaphragm consists of a Pb(Zr, Ti)O3 (PZT) thin film, electrode layers, an isolation layer and a Si substrate. The diaphragm is deflected by transverse stress in the PZT thin film which is fabricated by a sputtering and annealing process. The PZT thin film has a piezoelectric coefficient d 31 of -100 pC/N, which is comparable to that of bulk PZT. A diaphragm deflection of 3 µ m was obtained at an electric field of 16 V/µm.

No abstract

No abstract

Highly miniaturized optical scanner integrated with a photo detector has been developed for miniaturization of scanning type of optical sensors. The scanner is fabricated by silicon micromachining technologies and is driven by a piezoelectric actuator. It is capable of two dimensional scanning and photo detection. The scanning angle is over 40 deg. x 30 deg. and the photo detecting sensitivity is 0.49 AIW for 680 nm wavelength light.

No abstract