Patent ID: 9391182
Filing Date: 2016-07-12
CPC Classification: H01L

Claim Text:
1. A manufacture method for a trench Insulated Gate Bipolar Transistor, comprising: preparing a semiconductor substrate; forming an epitaxial layer on a first side of the semiconductor substrate by epitaxial growth; forming a gate and an emitter of the trench Insulated Gate Bipolar Transistor on a second side of the semiconductor substrate; thinning the epitaxial layer to form a collector region; and metalizing in the collector region to form a collector; wherein the trench Insulated Gate Bipolar Transistor is a trench Field Stop Insulated Gate Bipolar Transistor; and the epitaxial growth comprises: forming a first epitaxial layer on the first side of the semiconductor substrate by epitaxial growth, wherein the first epitaxial layer is used to form a buffer layer; and forming a second epitaxial layer on the first epitaxial layer by epitaxial growth, wherein the second epitaxial layer is used to form a collector region.