Patent ID: 8907374

Claim:
An insulated gate bipolar transistor IGBT, comprising: a cell region on a front surface; a terminal region surrounding the cell region; an IGBT drift region of a first conductivity type; and an IGBT collector region on a back surface, wherein: the IGBT collector region is connected to the IGBT drift region and under the IGBT drift region, and the IGBT drift region comprises a first drift region under the cell region and a second drift region under the terminal region; and the IGBT collector region comprises a cell collector region of a heavily doped second conductivity type under the first drift region and a non-conductive isolation region adjacent to the cell collector region, wherein a length of the non-conductive isolation region is smaller than or equal to a length of the terminal region, and a thickness of the non-conductive isolation region is larger than or equal to a thickness of the cell collector region.