Patent ID: 7297603
Filing Date: 2007-11-20
Classification: H01L,H03K

Abstract:
1. A method of forming a bi-directional transistor comprising: forming a first MOS transistor on a semiconductor substrate of a first conductivity type; forming a body region of the first MOS transistor as a first doped region of a first conductivity and a first doping concentration on a surface of the semiconductor substrate and isolated from a first current carrying electrode region of the first MOS transistor by a first P-N junction and isolated from a second current carrying electrode region of the first MOS transistor by a second P-N junction; forming a source region of the first MOS transistor as a second doped region of a second conductivity type and a second doping concentration that is overlying a portion of the body region; forming a third doped region of the second conductivity type between the source region and the body region; and forming a second MOS transistor coupled to selectively couple the body region of the first MOS transistor to the first current carrying electrode of the first MOS transistor.