A new-structure LiTaO3 pyroelectric infrared detector

A LiTaO3 pyroelectric infrared detector with a new type of structure has been developed.The detective material is supported on an electric conductor by a special conductive adhesive which possesses low thermal conduction.In the fabrication process of the detector, the pyroelectric material is not handled in the form of thin chips, as in the conventional fabrication process. The detector is particularly suited to mass production, and should be able to be manufactured more economically than conventional pyroelectric detectors.The voltage responsivity and the specific detectivity D* (500, 10, 1) of the new type pyroelectric detector are nearly 300 V/W at 10 Hz and 2 × 108 cm√Hz/W, respectively.The pyroelectric responsitivity and D* of this new-type pyroelectric detector are calculated theoretically as a function of the thickness of the pyroelectric element, and the thickness dependence of the responsivity and D* are experimentally confirmed. The theoretical calculation has been shown to be in agreement with experimental results.