High brightness light emitting diode
AssigneeNational Chung Hsing University
InventorsRay-Hua Horng, Dong-Sing Wu, Yann-Jyh Chiang, Chi-Ying Chiu
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Abstract
The present invention discloses a high brightness light emitting diode and a method for producing the same. The light emitting diode includes a gallium phosphide window and a reflective mirror so as to promote brightness thereof. To produce the light emitting diode, a glass substrate is bonded to the main structure of the light emitting diode and then the temporary substrate for epitaxing thereon can be removed for depositing a reflective mirror. After bonding a permanent substrate below the reflective mirror, the glass substrate is removed, too. By means of the double-bonding process, reflectivity of the mirror is maintained in the present invention.
Claims10
A method for producing a high brightness light emitting diode, comprising steps of:
- a) providing a temporary substrate for epitaxing;
- b) sequentially epitaxing an n-type cladding layer, an active layer with quantum well structure and a p-type cladding layer on said temporary substrate;
- c) forming a p-GaP layer on said p-type cladding layer;
- d) forming a metal contact layer on said p-GaP layer;
- e) etching a part of said metal contact layer, said p-GaP layer, said p-type cladding layer and said active layer, and an upper part of said n-type cladding layer to expose said n-type cladding layer;
- f) forming a p-type ohmic contact electrode and an n-type ohmic contact electrode on said metal contact layer and said exposed n-type cladding layer to complete a main structure of said light emitting diode;
- g) bonding a glass substrate to an surface of said main structure on which with said electrodes are present;
- h) removing said temporary substrate;
- i) forming a reflective mirror on a bottom surface of said n-type cladding layer;
- j) bonding a permanent substrate to a bottom surface of said reflective mirror;
- and
- k) removing said glass substrate.
Dependencies are inferred from the claim text.