Patent ID: 8198699

Claim:
An integrated circuit (IC) package comprising: a metal pad having a first metal pad surface and a second metal pad surface substantially parallel to the first metal pad surface; a first dielectric layer having a first surface, a second surface, and a third surface, wherein the first dielectric layer covers a first end portion of the second metal pad surface, and the third surface of the first dielectric layer is substantially parallel to the first and second surfaces of the first dielectric layer; a second dielectric layer having a first surface, a second surface, and a third surface, wherein the second dielectric layer covers a second end portion of the second metal pad surface, and the third surface of the second dielectric layer is substantially parallel to the first and second surfaces of the second dielectric layer; and a metal structure covering a middle portion of the second metal pad surface, a first end portion of the third surface of the first dielectric layer, and a first end portion of the third surface of the second dielectric layer, wherein the metal structure comprises a flat metal disk or a pre-solder disk, wherein the pre-solder disk is a curved disk and comprises solder.