Patent ID: 9408301
Filing Date: 2016-08-02
CPC Classification: C04B,H01L,H05K

Claim Text:
1. A method of forming a direct bonded copper (DBC) substrate for a power electronic, comprising: coupling a first surface of a ceramic layer to a second surface of a metallic baseplate, the ceramic layer having a second surface opposing the first surface; coupling a first surface of a copper layer with the second surface of the ceramic layer, the first surface of the copper layer having a pattern comprising a first thickness and a second thickness greater than the first thickness, the first thickness and the second thickness both measured perpendicularly to the first surface of the ceramic layer; and forming traces in the copper layer by etching through the copper layer at the first thickness and etching through the copper layer at the second thickness, wherein the traces comprise two different trace thicknesses, where the trace thicknesses are measured perpendicularly to the first surface of the ceramic layer.