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Title:
TEMPERATURE SENSOR ELEMENT
Document Type and Number:
WIPO Patent Application WO/2019/135324
Kind Code:
A1
Abstract:
The purpose of the present invention is to prevent the occurrence of a reaction between a resistive pattern and a sintering auxiliary agent to retain a high measurement accuracy. A temperature sensor element (10) is provided with an alumina-based sintered body (11) and a resistive pattern (18) arranged in the inside of the alumina-based sintered body. The main component for the resistive pattern is platinum, and the alumina-based sintered body contains alumina in an amount of 99.70% by mass or more and contains no sintering auxiliary agent. That is, the purity of alumina in the alumina-based sintered body is high and no sintering auxiliary agent is contained. Therefore, the reaction of a sintering auxiliary agent with platinum in the resistive pattern can be avoided during the firing of alumina, and therefore the reaction of impurities contained in alumina with platinum in the resistive pattern can also be avoided. As a result, the TCR of platinum can be retained and the drifting of a resistance value can be prevented.

Inventors:
SHIMODAIRA, Masahiro (3672 Arai, Ina-sh, Nagano 25, 〒3960025, JP)
MIURA, Katsuya (4-5 Yazaki-cho, Fuchu-sh, Tokyo 25, 〒1830025, JP)
Application Number:
JP2018/042038
Publication Date:
July 11, 2019
Filing Date:
November 13, 2018
Export Citation:
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Assignee:
KOA CORPORATION (3672, Arai Ina-sh, Nagano 25, 〒3960025, JP)
International Classes:
G01K7/18; C04B35/111; H01C7/02
Foreign References:
JP2001050822A2001-02-23
JP2017201290A2017-11-09
JP2010018452A2010-01-28
JPS6465427A1989-03-10
JP2014006052A2014-01-16
Attorney, Agent or Firm:
AOKI, Hiroyoshi et al. (5F JS Ichigaya Bldg, 5-1 Goban-cho, Chiyoda-k, Tokyo 76, 〒1020076, JP)
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