Patent ID: 9685506
Date: 2017-06-20
CPC Classifications: H01L

Claim:
1. An insulated-gate bipolar transistor (IGBT) comprising: a drift region having a first conductivity type situated over a collector having a second conductivity type opposite said first conductivity type; first and second gate trenches extending through a base having said second conductivity type into said drift region; an inter-trench superjunction structure situated in said drift region between said first and second gate trenches, said inter-trench superjunction structure comprising at least one first conductivity region having said first conductivity type and at least two second conductivity regions having said second conductivity type situated between said first and second gate trenches; wherein said inter-trench superjunction structure is spaced apart laterally from said first gate trench by a first portion of said drift region; and wherein said inter-trench superjunction structure is spaced apart laterally from said second gate trench by a second portion of said drift region.