Patent ID: 11942507
Assignee: LUMILEDS, LLC
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A method of manufacturing a light emitting diode (LED) device comprising:
depositing a plurality of semiconductor layers including an N-type layer, an active region, and a P-type layer on a substrate;
depositing a conductive p-contact layer on the plurality of semiconductor layers and a hard mask layer on the conductive p-contact layer;
etching a portion of the conductive p-contact layer and the hard mask layer to form openings;
depositing inner spacer material in the openings to form inner spacers on sidewalls of conductive p-contact layer and the hard mask layer;
etching a portion of the semiconductor layers to form trenches and plurality of mesas defining pixels, each of the mesas comprising the semiconductor layers and each of the mesas having a height less than or equal to their width;
depositing a dielectric material in the trenches; and
depositing an N-contact material in a space between each of the mesas, the N-contact material providing optical isolation between each of the mesas, and electrically contacting the N-type layer of each of the mesas along sidewalls of the N-type layers, wherein the dielectric material insulates sidewalls of the P-type layer and the active region from the N-contact material;
each of the mesas comprising the conductive p-contact layer extending across a first portion of each of the mesas and including an edge, inner spacers between the conductive p-contact layer and the dielectric material extending across a remaining portion of each of the mesas on a portion the P-type layer, and the space between each of the mesas results in a pixel pitch in a range of from 1 μm to 100 μm and a dark space gap between adjacent edges of the conductive p-contact layer.