Varistor and fabricating method of zinc phosphate insulation for the same
AssigneeThinking Electronic Industrial Co., Ltd.
InventorChien-Liang Wu
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Abstract
A fabricating method and apparatus of an zinc phosphate coating for a varistor has a insulation formed on a surface of a body which does not include two opposite ends of the body formed two outer terminals. The insulation has anti-etch feature for the electrolyte, so that the exposed surface of the body prevents to be etched and to be electroplated a metal material on it. Therefore the varistor has a great fabricating yield and the great shape after electroplating the two outer terminals step.
Claims14
A fabricating method for zinc phosphate insulation on a varistor, wherein the varistor has a body with two outer terminals formed on two opposite ends of the body and an exposed surface, the fabricating method comprising:
- applying and depositing a phosphate compound on the surface of the body, wherein an over-saturated phosphate liquor is kept at a high temperature to deposit a phosphate compound;
- heating the phosphate compound until the phosphate compound turns to a transparent insulation;
- and
- applying metal materials on the two outer terminals of the body, wherein the outer terminals of the body uncovered by the insulation electroplates metal material on it;
- wherein the transparent insulation has an anti-etch feature for the electrolyte to keep the exposed surface of the body smooth.
Dependencies are inferred from the claim text.