Patent ID: 8492233

Claim:
An integrated circuit including a MOS field effect transistor (MOSFET), comprising: a lateral drift region, the drift region further including opposite first and second ends; an n-type drift lane extending from the first end to the second end; and a p-type drift lane extending from the first end to the second end; a resurf region laterally abutting the lateral drift region; an n-well abutting the drift region at the first end; a p-well abutting the drift region at the second end; an n-type n-channel drain element in the n-well; a p-type p-channel source element in the n-well; a p-type p-channel drain element in the p-well; an n-type n-channel source element in the p-well; a p-channel MOS dielectric layer on a top surface of the n-well adjacent to the p-channel source element and overlapping a portion of the drift region; an n-channel MOS dielectric layer on a top surface of the p-well adjacent to the re-channel source element and overlapping a portion of the drift region; a p-channel MOS gate on a top surface of the p-channel dielectric layer; an n-channel MOS gate on a top surface of the n-channel dielectric layer; an n-channel drain and p-channel source distributed contact on a top surface of the re-channel drain element and a top surface of the p-channel source element; and a p-channel drain and n-channel source distributed contact on a top surface of the p-channel drain element and a top surface of the n-channel source element; further comprising: a p-type PMOS cascode drain region in the n-well adjacent to the p-channel MOS gate; a PMOS cascode dielectric layer on a top surface of the n-well, the PMOS cascode dielectric layer being located between the p-type PMOS cascode drain region and the p-channel source element; and a PMOS cascode gate on a top surface of the PMOS cascode dielectric layer; such that the PMOS cascode drain region, the PMOS cascode dielectric layer, the PMOS cascode gate and the p-channel source element form a PMOS transistor in a cascode configuration with the MOSFET.