Patent ID: 8963253
Filing Date: 2015-02-24
Classification: H01L,H02H

Abstract:
1. A bi-directional bipolar junction transistor (BJT) comprising: a p-type substrate; an N+ doped buried layer disposed adjacent to the substrate; a first P-type well region disposed adjacent to the N+ doped buried layer, wherein the first p-type well region is in contact with the N+ doped buried layer; a second P-type well region disposed adjacent to the N+ doped buried layer, wherein the second p-type well region is in contact with the N+ doped buried layer; an N-type well region adjacent to the N+ doped buried layer and encompassing the first and second P-type well regions such that at least a portion of the N-type well region is interposed between the first and second P-type well regions; first, second, and third field oxide (FOX) portions disposed adjacent to the N-type well region; and first, second, third, and fourth field plates, the first field plate being disposed adjacent to the first FOX portion, the second and third field plates being disposed adjacent to respective portions of the second FOX portion, and the fourth field plate being disposed adjacent to third FOX portion; wherein the first and second P-type wells each comprise at least one N+ doped plate and at least one P+ doped plate.