Temperature sensor

Details Temperature sensor Temperature sensor

1997-03-11

1998-10-20

Gutierrez, Diego F. F.

Thermal measuring and testing

Temperature measurement

By electrical or magnetic heat sensor

374183, 338 25, 338 28, 338 17, 338314, G01K 718, H01C 304, H01C 1012

Patent

active

058236805

ABSTRACT:
A temperature sensor includes a ceramic substrate, and a sensing resistor containing platinum is embedded in the ceramic substrate. Electric current can be applied to the sensing resistor through the lead. The voltage of the sensing resistor can be detected through the second lead. Another resistor for dividing voltage is electrically connected to the sensing resistor, the resistor is trimmed by laser irradiation so as to adjust its electrical resistance value such that upon applying electric current having a certain value onto the sensing resistor an output voltage having a predetermined value is generated. Heat generated by the laser irradiation to the resistor does not affect an electrical resistance value of the resistor as much as that of the sensing resistor, thereby improving precision of the temperature sensor. The sensing resistor avoids contact with the atmosphere.

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