Patent ID: 6074892
Filing Date: 2000-06-13
Classification: H01L,Y02E

Abstract:
A method for creating a wavelength division multiplexing (WDM) photodetector, comprising the steps of:(a)(i) growing a first mirror on a bottom of a substrate;(ii) growing an absorbing layer having a first lattice constant on the first mirror:(iii) fusing a multiplication layer having a second lattice constant to a top of the substrate opposite to the first mirror, to form the wavelength division multiplexing photodetector, and thereby to permit a current to effectively pass between the absorbing layer and the multiplication layer;(b)(i) growing a second mirror on a second substrate;(ii) growing a cavity length layer on the second mirror;(c) selectively etching the cavity length layer such that the depth of the cavity length layer has more than one depth along a length of the cavity length layer; and(d) fusing the cavity length layer to the multiplication layer.