Patent ID: 6080614
Filing Date: 2000-06-27
Classification: H01L,Y10S

Abstract:
A method of fabricating a MOS-gated semiconductor device, comprising the steps of:forming a mask on a surface of a semiconductor substrate, the mask having at least one opening through which a corresponding source region, a corresponding body region, and a corresponding channel region are to be formed for at least one said MOS-gated semiconductor device;implanting a first conductivity type dopant at a first dose and a first energy level through the at least one opening to form a first layer;implanting a second conductivity type dopant at a second dose and a second energy level through the at least one opening to form a second layer deeper than the first layer,the second conductivity type dopant having a faster diffusion rate than the first conductivity type dopant and a propensity to migrate into high concentrations of the first conductivity type dopant; anddiffusing, in a single diffusion, the implanted first and second conductivity type dopants to form in the semiconductor substrate at least one said body region having a second conductivity type, at least one said source region having a first conductivity type, and at least one said channel region having a second conductivity type and a lower dopant concentration than a dopant concentration of said body region.