Patent ID: 7723139
Filing Date: 2010-05-25
Classification: B82Y,H01L,H01S

Abstract:
1. A method of quantum well intermixing (QWI) comprising: providing a wafer comprising upper and lower spatial layers, and at least one quantum well layer disposed between the upper and lower epitaxial layers, wherein the upper and lower epitaxial layers each comprise an barrier layer; applying at least one sacrificial layer over the upper epitaxial layer; forming a QWI enhanced region and a QWI suppressed region by applying a QWI enhancing layer over a portion of the sacrificial layer, wherein the portion under the QWI enhancing layer is the QWI enhanced region, and the other portion is the QWI suppressed region; applying a QWI suppressing layer over the QWI enhanced region and the QWI suppressed region; and annealing at a temperature sufficient to cause interdiffusion of atoms between the at least one quantum well layer and the barrier layers of the upper epitaxial layer and the lower epitaxial layer.