Patent ID: 7582533

Claim:
A method for manufacturing a lateral diffused MOS device, the method comprising: forming a buried layer doped with a second conductive type impurity in a first conductive type substrate; forming a first well doped with the first conductive type impurity in the buried layer; forming a field insulator on a surface of the first well; forming a gate insulating layer on a surface of the first well at both sides of the field insulator; forming a second well doped with the first conductive type impurity in the first well at one side of the field insulator; forming a source region in a surface of the second well; forming a drain region isolated from the source region in the surface of the first well at the other side of the field insulator; forming a gate electrode on the gate insulating layer on the source region; forming a first field plate connected with the gate electrode on a predetermined portion of the field insulator; and forming a second field plate spaced apart by a predetermined spacing from the first field plate on another predetermined portion of the field insulator.