Jj. Ho et al., The dynamic response analysis of a pyroelectric thin-film infrared sensor with thermal isolation improvement structure, IEEE DEVICE, 46(12), 1999, pp. 2289-2294
Both thoretical and experimental studies of the substrate effect on the the
rmal behavior of a PbTiO3 infrared (IR) sensor have been reported. With act
ive cantilever dimensions of 200 x 100 x 5 mu m(3) formed by etching proces
ses, the pyroelectric micro-electro-mechanical system (pyro/MEMS) structure
exhibits a much superior performance to that of a traditional IR-sensing b
ulk structure under the 800-mu W incident optical light with wavelength of
970 nm, Two-order improvement in current responsivity is obtained for the p
yro/MEMS structure. This shows the substrate effect on the performance of a
pyro/MEMS IR sensor is very significant. A simple model has also been prop
osed to illustrate the substrate effect more comprehensively.