Patent ID: 6071800
Filing Date: 2000-06-06
Classification: H01G,H05K

Abstract:
A method of manufacturing an electronic device comprising an element assembly made up of electronic parts elements and a metal film external electrode formed on a surface of the element assembly and connected to the electronic parts elements, in which the improvement comprises the steps of:depositing an anchor layer containing a first metal on the surface of the element assembly by vacuum evaporation or sputtering;depositing a solder-resistant layer containing a second metal on the surface of the anchor layer by vacuum evaporation or sputtering; anddepositing a solder-wettable layer containing a third metal on the surface of the solder-resistant layer by vacuum evaporation or sputtering and forming an intermediate layer containing an alloy of the second and third metals between the solder-resistant layer and the solder-wettable layer.