Title:
PYROELECTRIC CERAMIC COMPOSITION AND INFRARED SENSOR EMPLOYING IT
Document Type and Number:
Japanese Patent JP3196461
Kind Code:
B2
Abstract:
PURPOSE: To produce a high sensitivity infrared sensor excellent in productivity by producing a high quality pyroelectric ceramic which can be sliced with no cracking nor chipping while maintaining easy polarization conditions using a specified pyroelectric ceramic composition.
CONSTITUTION: The composition is represented by a general formula; Pbx[Ti(CO2 W1-z)1-y]1-xOn (n is an arbitrary number). x, y, z are limited as follows; 0.501≤x≤0.510, 0.80≤y≤0.97, and 0.46≤z≤0.49, and a part of Pb atoms are replaced by Ca atoms by 20 to 30 atomic %. Furthermore, the sensitivity is enhanced by adding 0 to 3 pts.wt. of MnO2 to 100 pts.wt. of the composition. When an infrared sensor 8 is manufactured using the pyroelectric ceramic in a light receiving element 1, a circuit combining the element 1, a resistor 2, and an FET 3 is formed on a printed board 4. It is then soldered to the pins of a hermetic seal 5 to which a metal cap 7 having a silicon window 6 is welded.
Inventors:
Tomohiro Tsuruta
Yasuki Nagatomo
Yasuki Nagatomo
Application Number:
JP30401193A
Publication Date:
August 06, 2001
Filing Date:
December 03, 1993
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
G01J1/02; C04B35/46; G01J5/02; G01J5/34; H01B3/00; (IPC1-7): C04B35/46; G01J1/02; G01J5/02
Domestic Patent References:
| JP6267330A |
Other References:
【文献】米国特許4983839(US,A)
【文献】米国特許4764492(US,A)
【文献】米国特許4764492(US,A)
Attorney, Agent or Firm:
Fumio Iwahashi (2 others)