Thin-film semiconductor electrodes deposited on pyroelectric ceramics: Application to compact spectrally selective pyroelectric IR sensors
✍ Scribed by J. de Frutos; F. López
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 812 KB
- Volume
- 37-38
- Category
- Article
- ISSN
- 0924-4247
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✦ Synopsis
Ferroelectnc materials hke lead calcmm tltanate ceranucs have been demonstrated to he excellent matenals for pyroelectrlc detectors They are usually covered Hrlth electroded black gold Thus matenal 1s extensively used to obtam both a fan IR absorption and a good electrical contact Spectrally selective compact IR sensors for spenfic apphcatlons could be obtained by means of vacuum deposition on the pyroelectnc substrate of the specific multdayer IR filter However, very smooth substrates are reqmred for proper adhesion of the multtlayer, wl-uch 1s not the case for black gold layers Besides, these layers do not possess the opt& properties required m the filter's design and development process Senuconductors like germamum or &con are typical IR optIca materials widely used m opt4 multilayers Vacuum-evaporated Ge thm films have been deposited onto pyroelectrlc lead calcium titanate ceramics In tlus work, a new system to Improve the performance of lead calcium tltanate cera~lllcs for an infrared sensor IS proposed Studies have also been performed m order to estabhsh the behawour of this matenal as both an electrode and first layer The feaslblhty of obtanung compact spectrally selective pyroelectnc IR sensors has also been proved