| The common problems of the varistors silver paste is lower adhesion, uncover after the big current impact. The effects of the glass ingredient, the additives and the silver powders on the properties of the varistors was investigated. The glass ingredients and the additives were proved to be an important effect on the adhesion and the big current impact. The properties of the silver paste can be improved by using mixed silver powders, adding a additive and suitable glass powder. The silver paste printability, sheet resistivity, adhesion, wettability and soldering resistance can all meet the requirements. |
