Patent ID: 7179703
Filing Date: 2007-02-20
Classification: H01L,Y10S

Abstract:
1. A method of forming an electrical structure on a substrate, comprising: performing a first doping operation on a substrate, the first doping operation comprising depositing dopants to a first depth within the substrate to form a first doped region, wherein the first doped region has a lower periphery that is substantially planar and substantially parallel to at least one of a top surface of the substrate and a bottom surface of the substrate; forming an electrically insulating layer over the substrate; and performing a plasma doping (PLAD) operation on the substrate, the PLAD operation comprising depositing dopants to a second depth within the substrate to form a second doped region, wherein the second doped region is formed by the dopants passing through the electrically insulating layer and settling at the second depth within the substrate and wherein the second doped region has a higher dopant concentration than the first doped region, is at least partially circumscribed by the first doped region, and has a shallower lower periphery than the lower periphery of the first doped region.