| 摘要 |
PURPOSE:To improve the reliability of contacting, and lengthen the working life of a sliding contact device, by using Ag-bismuth oxide of 3-15wt.% for 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-bismuth oxide of 3-15wt.% is used. The hardness of this material is about Hv 110-150, 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, so that the reliability of contacting is remarkably increased, and the working life of the device is remarkably lengthened.
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