Patent · US Active

High-efficiency red micro-LED with localized current aperture

US11362237B2 · kind B2 · utility

1Cited by

3References

20Claims

0Family size

Assignee

Facebook Technologies, LLC · US

Inventors

Berthold Hahn · Hemau, DE
Thomas Lauermann · Heilbronn, DE
Markus Broell · Cork, IE

Key dates

Filing date	Jun 2, 2020
Grant date	Jun 14, 2022
Priority date	—
Expiry date	Sep 24, 2040

Classification

Technology area (CPC H)Electricity
CPC primaryH10H20/8162
WIPO fieldSemiconductors
WIPO sectorElectrical engineering

Abstract

A micro-light emitting diode (micro-LED) includes a current aperture to confine the current in a localized region such that the carrier recombination mostly occurs in the localized region to emit photons, thereby reducing the surface recombination and improving the quantum efficiency. The current confinement and localization are achieved using a localized breakthrough of a barrier layer by a localized contact, lightly p-doped active layers to suppress lateral transport of the carriers to the surface region, selective ion implantation, etching, or oxidation of a semiconductor layer, or any combination thereof.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.