Kubovcik & Kubovcik
Temperature sensor
 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. 
NGK Insulators, Ltd.
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inventional inventional inventional additional
Nobuhide Nobukazu
Kato Ikoma