PURPOSE: To improve the reliability of contacting, and lengthen remarkably the working life of a sliding contact device, by using Ag-WC of 40W80wt.% for a slide contact material fixed on a spring terminal member.

CONSTITUTION: A wiring plate 4 is constituted by arranging an RuO2 thick film resistance pattern 2, and an Au thick film pattern 3 having a specified interval and length, on an Al2O3 substrate 1. For the contact wire material 6 of a moving contact 5 sliding on the Au pattern 3, Ag-WC of 40W80wt.% is used. The hardness of this material is about Hv 100W150, and the material is soft and easy to slide. Therefore, in the case of contacting action, a conductor pattern of the Au system thick film on the ceramic substrate is prevented from abrading cohering and exfoliating, and the working life of the device is remarkably lengthened.