US Patent No. 10,147,843

SEMICONDUCTOR LIGHT EMITTING DEVICE INCLUDING A WINDOW LAYER AND A LIGHT-DIRECTING STRUCTURE


Patent No. 10,147,843
Issue Date December 04, 2018
Title Semiconductor Light Emitting Device Including A Window Layer And A Light-directing Structure
Inventorship John Epler, San Jose, CA (US)
James G. Neff, Felton, CA (US)
Oleg B. Shchekin, San Francisco, CA (US)
Assignee LUMILEDS LLC, San Jose, CA (US)

Claim of US Patent No. 10,147,843

1. A device comprising:a window layer;
a light-directing structure comprising a porous semiconductor layer formed in an n-type region, the light-directing structure configured to direct light toward the window layer;
a semiconductor structure, disposed between the window layer and the light-directing structure, comprising a light emitting layer disposed between the n-type region and a p-type region;
an opening formed in the semiconductor structure;
a first metal layer in direct contact with the light-directing structure;
a dielectric layer disposed over a first portion of the first metal layer and in the opening;
a second metal layer disposed over the dielectric layer;
a transparent conductive oxide disposed between the p-type region and the window layer and in direct contact with the p-type region;
a first hole formed in the dielectric layer, wherein the first hole exposes the transparent conductive oxide such that the second metal layer is in direct contact with the transparent conductive oxide through the first hole; and
a second hole formed in the dielectric layer, such that a second portion of the first metal layer is over the dielectric layer and in direct contact with the first portion of the first metal layer in the second hole.