Patent ID: 6335265
Filing Date: 2002-01-01
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device, including:providing a substrate having first and second main surfaces and having a semiconductor element in the first main surface; forming a first groove in the first main surface of the substrate, the first groove having a bottom surface with a width and opposing side surfaces at the bottom surface; forming selectively a catalyst layer on the bottom surface of the first groove, the catalyst layer containing palladium in an upper surface; forming a first metal layer of a nickel based plated layer on the upper surface of the catalyst layer by electroless plating, a top portion of the first metal layer being located below a top edge of the side surface of the first groove; forming a second groove in the second main surface of the substrate along the first groove, the second groove having a bottom with a smaller width than that of the bottom of the first groove and opposing side surfaces at the bottom surface, the bottom surface of the second groove being a backside surface of the catalyst layer; forming a second metal layer overlying the bottom and side surfaces of the second groove; and laser-cutting the first metal layer, the catalyst layer, and the second metal layer through the first groove.