Patent ID: 6054726
Filing Date: 2000-04-25
Classification: H01L,H01S

Abstract:
A light-emitting semiconductor device, comprising:a semiconductor substrate with an upper surface and a lower surface, having at least, in lower-to-upper order, a first multilayer reflecting layer, a first cladding layer, an active layer of a first conductive type, a second cladding layer, and a second multilayer reflecting layer, the first multilayer reflecting layer and the second multilayer reflecting layer respectively comprising alternating layers of different semiconductor materials, the active layer having a bandgap energy, the first cladding layer and the second cladding layer having respective bandgap energies exceeding the bandgap energy of the active layer, the first multilayer reflecting layer and the second multilayer reflecting layer each including at least one constituent layer with a bandgap energy exceeding the bandgap energy of the active layer;an area of a second conductive type extending from said upper surface into said active layer in at least one selected region of said semiconductor substrate, forming a pn junction in said active layer;a first electrode making contact with said semiconductor substrate outside said area of said second conductive type; anda second electrode making contact with said upper surface in said area of said second conductive type.