Patent ID: 7537970
Filing Date: 2009-05-26
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, the first MOS transistor having a first current carrying electrode and a second current carrying electrode; forming a body region of the first MOS transistor 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 second MOS transistor configured to selectively couple the body region of the first MOS transistor to the first current carrying electrode of the first MOS transistor; and forming a third MOS transistor on a surface of the semiconductor substrate and coupled to form a current flow path in parallel with the first MOS transistor.