The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 06, 2015
Filed:
Apr. 27, 2011
Tsunenobu Hori, Kariya, JP;
Kaoru Kuzuoka, Toyota, JP;
Chiaki Ogawa, Tajimi, JP;
Motoki Satou, Okazaki, JP;
Katsunori Yamada, Nagoya, JP;
Takao Kobayashi, Seto, JP;
Kazuhiro Inoguchi, Toyota, JP;
Tsunenobu Hori, Kariya, JP;
Kaoru Kuzuoka, Toyota, JP;
Chiaki Ogawa, Tajimi, JP;
Motoki Satou, Okazaki, JP;
Katsunori Yamada, Nagoya, JP;
Takao Kobayashi, Seto, JP;
Kazuhiro Inoguchi, Toyota, JP;
DENSO CORPORATION, Kariya, JP;
KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, Nagakute, JP;
Abstract
A temperature sensing element includes a thermistor composed of Si-base ceramics and a pair of metal electrodes bonded onto the surfaces of the thermistor. The metal electrodes contain Cr and a metal element α having a Si diffusion coefficient higher than that of Cr. A diffusion layer is formed in a bonding interface between the thermistor and each metal electrode, the diffusion layer including a silicide of the metal element α in a crystal grain boundary of the Si-base ceramics. A temperature sensor including the diffusion layers is provided. Owing to the diffusion layers, the temperature sensor ensures heat resistance and bonding reliability and enables temperature detection with high accuracy in a temperature range, in particular, of from −50° C. to 1050° C.