Patent ID: 6449840
Filing Date: 2002-09-17
Classification: H05K,Y02P,Y10T

Abstract:
A method for providing a solder bumped electronic device comprising the steps of:cladding at least one side of a substrate with a conductor to thereby provide a cladded substrate; forming at least one via through the cladded substrate; depositing copper into the at least one via to thereby form a copper core therein which is connected to the cladding; forming a photoresist retainer wall adjacent the at least one via over the cladding, wherein the retainer wall defines at least one volume; depositing solder having a fluid state in which the solder is freely conformable to the shape of any container into which it is deposited into the at least one volume, wherein the solder flowably conforms to the shape of the at least one volume, to thereby provide at least one solder deposit; removing the photoresist from the cladding, wherein the at least one solder deposit remains and protrudes in relation to the substrate at the at least one via; removing the cladding, wherein the at least one solder deposit remains; and reflowing the at least one solder deposit to thereby cause convex curving thereof.