Patent ID: 6825104
Filing Date: 2004-11-30
Classification: H01L,Y02E,Y02P

Abstract:
A method of manufacturing a semiconductor device, comprising a semiconducting substrate in the shape of a slice, the method comprising:step 1) selectively applying a pattern of a solids-based dopant source to a first major surface of said semiconducting substrate; step 2) diffusing the dopant atoms from said solids-based dopant source into said substrate with controlled heating in a gaseous environment surrounding said semiconducting substrate, the dopant from said solids-based dopant source diffusing directly into said substrate to form a first diffusion region in said substrate immediately beneath said pattern of said solids-based dopant source and, at the same time, diffusing said dopant from said solids-based dopant source indirectly via said gaseous environment into said substrate to form a second diffusion region in at least some areas of said substrate not covered by said pattern; and step 3) forming a metal contact pattern substantially in alignment with said first diffusion region without having etched said second diffusion region substantially.