Patent ID: 6448105
Filing Date: 2002-09-10
Classification: H01L,Y02E,Y02P,Y10S

Abstract:
A method for one-sided doping of a semiconductor substrate, especially a silicon wafer, comprising the steps:depositing an oxide layer both on a first side of the semiconductor substrate and on a second side of said semiconductor substrate, wherein the first side of the semiconductor substrate is to be doped and the second side of the semiconductor substrate is not to be doped, depositing a doping layer onto said oxide layer on the first side of said semiconductor substrate, and diffusing a doping agent contained in said doping layer into said semiconductor substrate such that said doping agent passes through said oxide layer located between said semiconductor substrate and said doping layer and such that said oxide layer deposited on the second side of said semiconductor substrate serves as a protective oxide and prevents diffusion of said doping agent into the second side of said semiconductor substrate.