Patent ID: 6160289
Filing Date: 2000-12-12
Classification: H01L,H03K

Abstract:
A high-voltage RESURF EDMOS transistor, comprising:a high-voltage NMOS transistor including a channel region having a P-well region being formed by diffusing P-type impurities on a P-type silicon substrate and a polysilicon gate connected to a gate contact terminal via a gate oxide film provided on a surface of the P-well region; a source region having a first P+ doping region connected with a P+ body contact terminal between first and second field oxide films within the P-well region, a first N+ doping region connected to a first source/drain contact terminal between the second oxide film and a third field oxide film, and a drift region formed between the first N+ doping region and the channel region; and a drain region having a second P+ doping region connected with the P+ body contact terminal between fourth and fifth field oxide films, a second N+ doping region connected with a second drain/source contact terminal between the fifth field oxide film and a sixth field oxide film, and a second drift region formed between the second N+ doping region and the channel region; andthe high-voltage PMOS transistor including a channel region having an N-well region being formed by diffusing N-type impurities on a N-type silicon substrate and a polysilicon gate connected to a gate contact terminal via a gate oxide film provided on a surface of the N-well region; a source region having a first N+ doping region connected with a first N+ body contact terminal between first and second field oxide films within the N-well region, a first P+ doping region connected with a first source/drain contact terminal between the second field oxide film and a third field oxide film, and a first drift region formed between the first P+ doping region and the channel region; and a drain region having a second N+ doping region connected with a second N+ body contact terminal between fourth and fifth field oxide films, a second P+ doping region connected with a second drain/source contact terminal between the fifth field oxide film and a sixth field oxide film, and a second drift region formed between the second P+ doping region and the channel region.