TEMPERATURE SENSITIVE ELEMENT AND TEMPERATURE SENSOR

摘要

In a temperature sensitive element, a covering member containing a glass as a main component and having a thermal expansion coefficient smaller than that of output lines is provided on pads to cover at least portions of output lines located on the pads. The pads are formed of a glass-based material which contains, as main components, a metal and a glass having a thermal expansion coefficient smaller than that of a ceramic substrate, and the thermal expansion coefficient of the pads is set to be smaller than that of the output lines. Accordingly, in the case where the temperature sensitive element is exposed to a temperature change between a high temperature and ordinary temperature, compressive stress can be applied to the output lines by the covering member and the pads. Thus, the fixing force between the output lines and the pads can be increased.

主权项

1. A temperature sensitive element comprising:
a ceramic base; a metallic resistor layer formed on the ceramic base; a pad formed on the ceramic base, the pad having electric conductivity and being electrically connected to the metallic resistor layer; an output line formed of a metal and joined to a surface of the pad; and a covering member disposed on the pad so as to cover at least a portion of the output line, which portion is located on the pad, the covering member containing a glass as a main component and having a thermal expansion coefficient smaller than that of the output line, wherein the pad is formed of a glass-based material which contains, as main components, a metal and a glass, the glass of the pad having a thermal expansion coefficient smaller than that of the ceramic base, and the pad having a thermal expansion coefficient smaller than that of the output line.