Patent ID: 9153678
Filing Date: 2015-10-06
Classification: H01L

Abstract:
1. A power semiconductor device, comprising: a contact formed in an active region; a first conductive body layer and a second conductive emitter layer formed below the contact; a trench gate extendedly formed from the active region into a first termination region and formed alternately with the contact; a first conductive well formed between the contact of the active region and the trench gate; a first conductive well extending portion formed in the first termination region and a part of a second termination region; a first conductive field limiting ring formed in the second termination region and contacting the first conductive well extending portion; and a high-concentration second conductive buried hole accumulation part formed below the first conductive well and the first conductive well extending portion, the high-concentration second buried hole accumulation part being formed to cover at least a portion of a side surface of the trench gate.