Patent ID: 8697467
Filing Date: 2014-04-15
Classification: H01L

Abstract:
1. A method of forming a compound semiconductor device, the method comprising: forming a monolayer of dopant atoms on a surface of a substrate comprising III-V semiconductor material by a self-limiting formation reaction of the dopant atoms; forming a capping layer on the monolayer of dopant atoms; and performing an annealing process to drive the dopant atoms of the monolayer of dopant atoms that are on the surface of the substrate and below the capping layer into the substrate to a desired junction depth in the III-V semiconductor material, wherein the junction depth formed in the III-V semiconductor material is within about 5 nm from a surface of the III-V semiconductor material; wherein the dopant atoms comprise sulfur (S) and the III-V semiconductor material comprises InAs, wherein forming the monolayer of dopant atoms on the surface of the substrate comprising the III-V semiconductor material comprises forming a monolayer of S on an InAs surface of the substrate.