Patent ID: 6914270
Filing Date: 2005-07-05
Classification: H01L

Abstract:
1. An IGBT with PN insulation, comprising: a low-doped semiconductor substrate of a first conductivity type; a low-doped drift zone of the first conductivity type formed in said low-doped semiconductor substrate; and a first highly doped well zone of the first conductivity type and a second highly doped well zone of a second conductivity type, opposite to the first conductivity type, successively disposed between said drift zone and said semiconductor substrate providing an electrical PN insulation; an IGBT cell connected to an anode, a cathode, and gate electrodes; said substrate, said well zones and said IGBT cell forming a semiconductor body; and said first well zone and said second well zone being electrically separated from said anode, said cathode, and said gate electrodes within said semiconductor body.