Patent ID: 9117970
Filing Date: 2015-08-25
Classification: H01L

Abstract:
1. A light emitting device comprising: a body comprising a substrate of a semiconductor material of a first doping kind of a first doping concentration, the substrate having a plurality of thickness dimensions; and an isolation layer adjacent to the substrate; the substrate having a first upper surface comprising a plurality of surface parts, and having formed therein on one side of the first upper surface, and according to a bulk semiconductor fabrication process utilizing lateral active area isolation techniques utilizing bodies of an isolation material; a first island of a second doping kind of a second doping concentration to form a first junction between the first island and the substrate, the first island having a first face, an upper surface and a bottom, the upper surface forming a first part of the plurality of surface parts and the bottom interfacing with the substrate; and a second island of a third doping kind of a third doping concentration spaced laterally from the first island, the second island having a second face facing the first face of the first island, an upper surface and a bottom, the upper surface of the second island forming a second part of the plurality of surface parts and the bottom interfacing with the substrate, a third part of the plurality of surface parts comprising a portion of the first upper surface located between the first and second parts of the first upper surface; the substrate providing a laterally extending link between the first face of the first island and the second face of the second island, the link comprising: an upper surface comprising the third part of the first upper surface, such that the first, second and third parts of the first upper surface collectively form a planar interface with the adjacent isolation layer; and opposed sidewalls, each sidewall of the link extending on the one side of the first upper surface from the first face of the first island to the second face of the second island, so that each sidewall abuts a region of the isolation layer extending beyond the planar interface; a terminal arrangement connected to the body and configured to establish a reverse bias voltage over the first junction to cause a breakdown mode of the first junction, thereby to cause the device to emit light; and a region configured to facilitate the transmission of the emitted light, the region extending on another side of the first upper surface of the substrate, perpendicularly away from a zone comprising at least one of the first face and at least part of the link adjacent to the first face.