MANUFACTURE OF NON-LINEAR RESISTOR DEPENDENT ON VOLTAGE

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing a varistor which prevents clearance between a ceramic substrate and an insulating resin film. SOLUTION: A method for manufacturing a varistor comprises the process of forming a ceramic substrate exhibiting properties of a varistor, the process of making the surface of the ceramic substrate coarse, the process of forming an electrode on the ceramic substrate and the process of coating the ceramic substrate with an insulating resin film. The surface of the ceramic substrate can be made coarse by corroding with a chemical agent containing hydrofluoric acid or by sand blasting or barreling.