Patent ID: 8772144
Filing Date: 2014-07-08
Classification: H01L

Abstract:
1. A method for forming a vertical conduction nitride-based Schottky diode, comprising: providing an insulating substrate; forming a nitride-based semiconductor body of a first conductivity type on the insulating substrate; forming a first metal layer on a front side of the nitride-based semiconductor body to form a Schottky junction, the first metal layer forming an anode electrode of the Schottky diode; forming a second metal layer on the first metal layer; forming a solder ball on the second metal layer; forming a wafer level molding layer on the front side of the nitride-based semiconductor body, the wafer level molding layer encapsulating the second metal layer and at least part of the solder ball; separating the insulating substrate from the semiconductor body to expose a backside of the nitride-based semiconductor body; and forming a third metal layer on an exposed backside of the nitride-based semiconductor body, the third metal layer forming an ohmic contact with the semiconductor body and forming a cathode electrode of the Schottky diode, wherein the Schottky diode has a vertical current path from the solder ball, through the anode electrode and the Schottky junction to the cathode electrode.