Invention Grant
US07208349B2 Package substrate manufactured using electrolytic leadless plating process, and method for manufacturing the same 失效
使用电解无铅电镀工艺制造的封装衬底及其制造方法

Package substrate manufactured using electrolytic leadless plating process, and method for manufacturing the same
Abstract:
A method of manufacturing a package substrate includes forming a first copper plated layer on a base substrate having through holes and inner surfaces of the through hole, coating a first resist over the first copper plated layer, partially removing the first resist, forming a second copper plated layer on the first copper plated layer, stripping the first resist, coating a second resist over the resultant structure, and removing the second resist from regions where wire bonding pads and solder ball pads are to be formed, removing exposed portions of the first copper plated layer, forming the wire bonding pads and the solder ball pads, removing the second resist, removing exposed portions of the first copper plated layer, and coating a solder resist over all surfaces of the resultant structure, and removing portions of the solder resist respectively covering the wire bonding pads and the solder ball pads.
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