Patent ID: 7773840
Filing Date: 2010-08-10
Classification: B82Y,G02B,H01S

Abstract:
1. A method for etching laser layers of a wafer when forming a sloped junction region to passive amorphous silicon waveguides, comprising: etching an InGaAs cap portion with H etching a first InP layer with HCl:H rinsing said wafer with NH reactive ion etching an InGaAsP layer with a gas mixture, wherein said reactive ion etching forms a plasma polymer deposited on said wafer; removing said plasma polymer in an O etching a second InP layer with HCl:H rinsing said wafer with NH reactive ion etching a second InGaAsP layer and a third InP layer with said gas mixture, wherein said reactive ion etching forms a second plasma polymer deposited on said wafer; removing said second plasma polymer in an O etching a final InP layer with HCl:H