Patent ID: 9653655
Date: 2017-05-16
CPC Classifications: H01L

Claim:
1. A method of fabricating ZnO layers on a III-Nitride light emitting diode (LED), comprising: obtaining the III-Nitride LED comprising a light emitting active layer between a III-Nitride p-type layer and a III-Nitride n-type layer; obtaining a first aqueous solution having a first composition containing dissolved Zn(II); heating the first aqueous solution to a first temperature less than 100° C.; synthesizing and depositing an epitaxial ZnO seed layer, comprising submerging a III-nitride surface of the III-Nitride LED in the first aqueous solution at the first temperature, changing a pH of the first aqueous solution after the submerging to form a first pH, and using a chemical reaction involving the dissolved Zn(II) under conditions including the first pH, the first composition, and the first temperature, to form the epitaxial ZnO seed layer on the III-Nitride surface of the III-Nitride LED; annealing the epitaxial ZnO seed layer at a second temperature higher than 100 degrees Celsius; after the annealing, synthesizing and depositing one or more ZnO layers, comprising submerging the epitaxial ZnO seed layer in a second aqueous solution having a second pH and a second composition containing dissolved Zn(II), to form the one or more ZnO layers on the epitaxial ZnO seed layer; and fabricating an n-contact to the n-type III-nitride layer and fabricating a p-contact to the one or more ZnO layers.