PYROELECTRIC BODY MATERIAL, MANUFACTURE OF PYROELECTRIC LIGHT RECEIVING ELEMENT USING PYROELECTRIC MATERIAL, AND INFRARED SENSOR USING PYROELECTRIC LIGHT RECEIVING ELEMENT

摘要

PURPOSE: To provide a pyroelectric light receiving element of high quality and high sensitivity without cracking, chipping and micro surface cracks at the time of being machined into thin plate shape by forming pyroelectric body material of a Pb compound as a main component, and adding MnO₂ as an auxiliary component. ;CONSTITUTION: This pyroelectric body material is mainly composed of a compound expressed by Pb₂-[Ti_y(Co_zW_1-z)₁-y]_1-xO_n (where (n) is an optional number, and x, y, z satisfy the condition of 0.502≤x≤0.510, 0.80≤y≤0.97, 0.46≤z≤0.49), with part of Pb atom substituted by Ca atom by 20-30mol%, and MnO₂ is further added by 0.3wt.% or less as an auxiliary component. At the time of manufacturing an infrared sensor 8 using this pyroelectric body material, a circuit formed of the combination of a pyroelectric light receiving element 1, a resistance 2 and a FET 3 is formed at a printed circuit board 4, and the printed circuit board 4 is soldered to the pins of a hermetic seal 5. A metal cap 7 with a silicon plate 6 mounted to the apesrture is then welded to the hermetic seal 5.;COPYRIGHT: (C)1995,JPO