Patent ID: 9054099
Filing Date: 2015-06-09
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a semiconductor substrate having a first side and a second side; an integrated circuit in the semiconductor substrate; a plurality of copper terminals at the first side of the substrate, wherein the copper terminals are electrically connected to the integrated circuit; a dielectric layer on the first side of the substrate, wherein the dielectric layer has a plurality of openings at least partially aligned with corresponding copper terminals, and wherein individual openings have sidewalls; and a plurality of wirebond interfaces on the copper terminals and at least partially in the openings, the individual wirebond interfaces including an adhesion element on the corresponding copper terminal and a wirebond element on the adhesion element, wherein the adhesion element has a depression extending into the opening, and wherein the wirebond element comprises a nickel layer that at least substantially fills the depression and a wirebond film on the nickel layer, at least a portion of the wirebond film being in the opening, and the nickel layer having a volume in the depression greater than a volume of the wirebond film in the depression.