Micro-LED device

US10490699B2 · kind B2 · utility

Assignee

• Facebook Technologies, LLC · US

Inventors

• Vincent Brennan · Cork, IE
• Christopher Percival · Blarney, IE
• Padraig Hughes · Cork, IE
• Allan Pourchet · Cork, IE
• Celine Claire Oyer · Cork, IE

Key dates

• Filing date: Aug 14, 2018
• Grant date: Nov 26, 2019
• Expiry date: Aug 14, 2038

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/841

Abstract

A micro-LED, μLED, comprising: a substantially parabolic mesa structure; a light emitting source within the mesa structure; and a primary emission surface on a side of the device opposed to a top of the mesa structure; wherein the mesa structure has an aspect ratio, defined by (H2*H2)/Ac, of less than 0.5, and the μLED further comprises a reflective surface located in a region from the light emitting source to the primary emission surface, wherein the reflective surface has a roughness, Ra, less than 500 nm.