Patent ID: 9418846
Filing Date: 2016-08-16
CPC Classification: H01L

Claim Text:
1. A method of forming a dopant junction in a semiconductor device, the method comprising: performing a surface modification treatment on an exposed surface of a semiconductor layer; depositing an n-type dopant material for a Group III-V semiconductor material on the exposed surface of the semiconductor layer; performing a low temperature anneal in an oxygen free environment in order to drive the dopant material into the semiconductor layer; depositing a metal layer on the dopant material; and alloying the metal layer with the dopant material to form a semiconductor device junction; wherein: the semiconductor layer is composed of a Group III-V semiconductor material; the surface modification treatment occurs in a low pressure vacuum chamber and wherein the surface modification treatment includes applying a low velocity stream of gaseous hydrogen to the exposed surface of the semiconductor layer in order for oxygen desorption to occur to form a water vapor, which thereby removes a plurality of surface oxides from the exposed surface of the semiconductor layer in order to provide an oxide-free surface for material adhesion, and wherein after the surface modification treatment, the semiconductor device remains in the oxygen free environment; and each of the above processes occur at a low temperature.