Temperature sensor and production method thereof
AssigneesDenso Corporation, Shibaura Electronics Co., Ltd.
InventorsTomohiro Adachi, Atsushi Kurano, Kazuto Koshimizu, Norihiko Shimura, Takamasa Yoshihara
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Abstract
In a temperature sensor including a pair of electrode wires for signal lead-out, bonded to both opposing end faces of a thermistor device, this invention aims at preventing peeling, of bond portions, between the electrode wires and the thermistor device. This object can be accomplished by sealing the thermistor device 3 and the bond portions between the thermistor device 3 and the electrode wires 4 by using an electrically insulating glass member 6, and holding the pair of electrode wires 4 by using a holding member 8 made of an electrically insulating ceramic while a gap is kept between them.
Claims13
A temperature sensor including:
- a thermistor device (3);
- and
- a pair of electrode wires (4) for taking out a thermistor signal, bonded to both opposing end faces of said thermistor device in such a manner that one of the end sides thereof interposes said thermistor device between them and the other end side is taken out from said thermistor device;
- wherein said temperature sensor includes an electrically insulating holding member (8) for holding said pair of electrode wires while they keep a gap between them.
A method of producing a temperature sensor including a thermistor device (3) and a pair of electrode wires (4), for taking out a thermistor signal, connected to both opposing end faces of said thermistor device in such a fashion that one of the end sides thereof interposes said thermistor device between them and the other end side is taken out from said thermistor device, and further including an electrically insulating holding member (8) for holding said pair of electrode wires while they keep a gap between them;
- said method comprising the steps of:
- using a high melting point metal such as Pt or a Pt alloy for said electrode wires (4);
- molding a ceramic powder such as alumina or zirconia into a shape having two holes for said holding member (8);
- and
- inserting said electrode wires into said holes and simultaneously firing them.
Dependencies are inferred from the claim text.