Patent ID: 7816248

Claim:
A method of forming a solder connector structure, said method comprising: forming an insulating layer with a first side and a second side; forming a via that extends vertically through said insulating layer from said first side to said second side and that is filled with a conductor; forming a stack of dielectric layers on said second side; forming a well that extends vertically through said stack to expose said via; forming a conductive liner on a top surface of said stack and on a bottom surface and sidewalls of said well; removing said conductive liner from said top surface of said stack using non-lithographic processes such that said conductive liner remains only on said bottom surface and said sidewalls of said well; and after said removing of said conductive liner from said top surface of said stack, forming a polyimide layer immediately adjacent to said top surface of said stack and further forming an opening through said polyimide layer and aligned above said well such that said polyimide layer and said conductive liner are physically separated.