Patent ID: 9306061
Filing Date: 2016-04-05
CPC Classification: H01L

Claim Text:
1. A transistor device, comprising: a drift layer having a first conductivity type; a first region in the drift layer, the first region having a second conductivity type that is opposite the first conductivity type; a body layer having the second conductivity type on the drift layer including the first region; a source layer on the body layer, the source layer having the first conductivity type; a body contact region having the second conductivity type, the body contact region extending through the source layer and the body layer and into the first region; a trench in the source layer and the body layer, the trench extending into the drift layer adjacent the first region, the trench having an inner sidewall facing away from the first region; a gate insulator on the inner sidewall of the trench; a gate contact on the gate insulator; and a source ohmic contact on the source layer, wherein the body contact region conductively connects the first region to the source ohmic contact.