Patent ID: 7767545
Filing Date: 2010-08-03
Classification: H01L

Abstract:
1. A process for reducing defects in an exposed surface layer of a substrate during its manufacture thereof, wherein the substrate comprises a top layer of a first material and an underlying layer of a second material whose lattice parameter is different from that of the first material, which process comprises: conducting an amorphization of a first portion of the top layer to create an amorphous region in the top layer extending from an exposed surface of the top layer to an amorphization interface that is within the top layer, with a second portion of the top layer below the interface being shielded from the amorphization and remaining as a crystalline structure; recrystallizing the amorphous region while also creating a network of defects at the interface, wherein the network forms a boundary for dislocations from the crystalline structure of the second top layer portion, and containing the dislocations in the second top layer portion that is located below the interface.