Patent ID: 6090690
Filing Date: 2000-07-18
Classification: H01L

Abstract:
A direct doping method for semiconductor wafers, comprising the steps of:providing a semiconductor wafer having a surface;exposing said surface of said wafer to a non-ionized process medium in order to directly dope at least a portion of said surface of said wafer, wherein said process medium comprises a dopant gas, and wherein said dopant gas comprises an organic compound of a dopant species; andheating said wafer, thermally activating said dopant species and causing solid state diffusion of said dopant species into said semiconductor wafer surface, wherein said doping is performed without the presence of plasma, wherein said organic compound is a material selected from the group consisting of (CH.sub.3).sub.3 B, (C.sub.2 H.sub.5).sub.3 B, (OCH.sub.3).sub.3 B, (CH.sub.3 S).sub.2 BCH.sub.3, (CH.sub.3).sub.2 BN(CH.sub.3).sub.2, (CH.sub.3).sub.2 BOCH.sub.3, and CH.sub.3 SB(CH.sub.3).sub.2 in order to dope at least portions of said surface of said semiconductor wafer with p type doping, wherein said dopant species is boron, wherein said semiconductor wafer is heated to a temperature in the range of 650.degree. C. and 1150.degree. C.