Patent ID: 6518138
Filing Date: 2003-02-11
Classification: H01L

Abstract:
A method for making a LDMOS transistor in an N-type substrate, the method comprising the steps of:forming a polysilicon gate atop said N-type substrate, said polysilicon gate comprising a thin gate oxide layer and a polysilicon layer, said polysilicon gate having a source side and a drain side; forming a P-type well in said N-type substrate extending from said source side to under said polysilicon gate; forming a drain side sidewall spacer on the drain side sidewall of said polysilicon gate; forming in said P-type well a source region adjacent to said polysilicon gate; forming a drain region on said drain side of said polysilicon gate; and subsequent to forming said drain side sidewall spacer, forming a N-type drift region between said drain region and said drain side sidewall spacer.