US Patent No. 10,326,051

LIGHT EMITTING DEVICE INCLUDING SHAPED SUBSTRATE


Patent No. 10,326,051
Issue Date June 18, 2019
Title Light Emitting Device Including Shaped Substrate
Inventorship Jerome Chandra Bhat, Eindhoven (NL)
Mark Melvin Butterworth, Eindhoven (NL)
Assignee Lumileds LLC, San Jose, CA (US)

Claim of US Patent No. 10,326,051

1. A device comprising: a substrate comprising lithium, the substrate having a first surface and a second surface opposite the first surface; and a semiconductor structure comprising a light emitting layer, the semiconductor structure having a first surface and a second surface opposite the first surface, the first surface of the semiconductor structure disposed adjacent the first surface of the substrate, at least a portion of the second surface of the substrate is shaped into at least one truncated pyramid, each truncated pyramid including four outer walls, each of the four outer walls of each truncated pyramid being angled toward a center of the truncated pyramid and adjoining two adjacent side walls of the same truncated pyramid at respective edges, wherein an intersecting notch is formed in each of the respective edges, each intersecting notch having side walls that form an angle between 600 and 750 relative to the second surface of the semiconductor structure.