Patent ID: 9553164
Date: 2017-01-24
CPC Classifications: H01L

Claim:
1. A method of manufacturing an IGBT (Insulated Gate Bipolar Transistor), comprising: providing a substrate having a first surface and a second surface; defining a plurality of spaced grooves on the first surface of the substrate; filling the plurality of grooves with semiconductor material to form a plurality of channels, wherein the channels and the substrate have different conductivity types; forming a drift region by bonding on the first surface of the substrate; forming a front side structure of the IGBT on the basis of the drift region; grinding the substrate from the second surface thereof until the channels are exposed, then the channels and the ground substrate are spaced, interleaved arranged; and forming a back side metal electrode on the channels and the ground substrate, wherein the back side metal electrode is in electrical contact with the channels and the ground substrate.