Patent ID: 6344116
Filing Date: 2002-02-05
Classification: C23C,C30B,H01L

Abstract:
An apparatus comprising:a. a mechanism inside the said apparatus capable of holding, positioning, and controlling temperature of a monocrystalline substrate; b. a plasma generator and associated sputtering system that comprise the said mechanism and a plurality of selectable targets; c. a first target of specified doping for the low-temperature growth of at least one epitaxial layer on the said monocrystalline substrate using sputter epitaxy, with the said substrate and the said at least one epitaxial layer being defined hereinafter as a sample; d. at least a second target having a high density of a selected doping impurity for the purpose of creating a layer of heavy doping at a surface of the said epitaxial layer, with the said layer of heavy doping being defined as part of the said epitaxial layer, with said epitaxial layer as thus defined having a well defined thickness; e. a high intensity source of energetic radiation that generates a uniform beam; f. a pattern generator for converting the said uniform beam into a patterned beam; and, g. an optical system that focuses the said patterned beam onto the surface of the said epitaxial layer in order to carry out flash diffusion in the said epitaxial layer, said flash diffusion causing dopant to penetrate to a depth that is at least equal to the said well defined thickness of the said epitaxial layer.