Patent ID: 9252219
Filing Date: 2016-02-02
CPC Classification: H01L

Claim Text:
1. An insulated gate bipolar transistor (IGBT) comprising: a gallium nitride (GaN) substrate with an upper surface; a first GaN layer with a first conductive type, which is formed on the upper surface, wherein the first GaN layer has a side wall vertical to the upper surface; a second GaN layer with a first conductive type, which is formed on the upper surface; a third GaN layer with a second conductive type or an intrinsic conductive type, which is formed on the first GaN layer, wherein the third GaN layer and the GaN substrate are separated by the first GaN layer; and a gate, which is formed on the GaN substrate, and has a side plate, which is directly or indirectly connected to the side wall in a lateral direction, for controlling a channel; wherein the second GaN layer is separated from the first GaN layer by the gate.