Patent ID: 9711679
Date: 2017-07-18
CPC Classifications: H01L

Claim:
1. A method for manufacturing a mid-infrared LED, the method comprising: forming an electrical contact between a substrate and a first light emission stage using variable-period superlattices; forming first and subsequent light emission stages to have double-heterostructure confinement configurations, with variable period semiconductor superlattices forming one or more charge injectors and minority carrier barriers; forming cascaded light emission stages by forming semi-metallic tunneling junctions between light emission stages using a junction between layers of GaSb and InAs doped with Si on both sides of the junction; growing strain-balanced superlattices and heterostructures; forming an electrical contact between a topmost light emission stage and an InAs current-spreading and ohmic contact layer using variable-period superlattices; and growing a layer of GaSb for etching light-extraction surface features.