Patent ID: 6875681

Claim:
A method comprising: providing a substrate; forming a metal layer over said substrate, said metal layer comprising a bond pad and a first member, said bond pad and said first member being separated by a gap; forming a first material over said bond pad and over said first member, said first material having a low dielectric constant, said first material having a thickness fill said gap; forming a second material over said first material, said second material being thin and resistant to moisture penetration, said second material being kept above said bond pad and said first member and out of said gap; forming a third material over said second material; forming an opening with tapered sidewalls in said third material and vertical sidewalls in said second material and said first material to expose a top surface of said bond pad; forming a fourth material over said third material, said tapered and vertical sidewalls of said opening, and said top surface of said bond pad, said fourth material being conductive, said fourth material having a thickness to prevent moisture penetration; and forming a bump on said fourth material over said sidewalls of said opening and over said top surface of said bond pad.