公开(公告)号：US12107204B1

公开(公告)日：2024-10-01

申请号：US17550990

申请日：2021-12-14

Applicant: Meta Platforms Technologies, LLC

Inventor： Jun-Youn Kim ,  Mohsin Aziz ,  Abdul Shakoor ,  Gary Charles Day

IPC: H01L33/62 ,  H01L27/15 ,  H01L33/00 ,  H01L33/10 ,  H01L33/32

CPC classification number: H01L33/62 ,  H01L27/156 ,  H01L33/0075 ,  H01L33/10 ,  H01L33/32 ,  H01L2933/0066

Abstract: A micro-LED device and a method of fabricating the micro-LED device are disclosed. The method includes processing from a first side (e.g., p-side) of epitaxial layers of a micro-LED wafer to form individual mesa structures and a first solid metal bonding layer on the mesa structures, bonding a second solid metal bonding layer on a backplane wafer to the first solid metal bonding layer of the micro-LED wafer, removing the substrate of the micro-LED wafer and processing from a second side (e.g., n-side) of the epitaxial layers to isolate the solid metal bonding layers and form individual electrodes (e.g., anodes) for individual micro-LEDs, forming a dielectric material layer on surfaces in regions between the mesa structures, and depositing one or more metal materials in the regions between the mesa structures to form mesa sidewall reflectors and a common electrode for the micro-LEDs.

公开(公告)号：US20220310891A1

公开(公告)日：2022-09-29

申请号：US17214727

申请日：2021-03-26

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Mohsin Aziz ,  Jun-Youn Kim ,  Samir Mezouari ,  Abdul Shakoor ,  James Walker Carswell

IPC: H01L33/60 ,  H01L25/075 ,  H01L33/50 ,  G02B27/01

Abstract: A display device includes a plurality of light emitting diodes (LEDs) having walls that extend through a transparent semiconductor layer and beyond the surface of the transparent semiconductor layer. Each of the walls surrounds at least part of each of the plurality of LEDs to collimate the light emitted by the plurality of LEDs. In some embodiments, the walls collimate the light emitted by the LEDs by reflecting the light or absorbing a portion of the light. The display device may further include an array of optical lenses that faces the surface of the transparent semiconductor layer to further collimate the light emitted from the LEDs.

公开(公告)号：US11569414B2

公开(公告)日：2023-01-31

申请号：US17177980

申请日：2021-02-17

Applicant: Meta Platforms Technologies, LLC

Inventor： Abdul Shakoor ,  Mohsin Aziz ,  Jun-Youn Kim

IPC: H01L33/10 ,  H01L33/46 ,  H01L27/15 ,  H01L33/00 ,  H01L33/38 ,  H01L33/42 ,  H01L33/60

Abstract: A micro-light emitting diode includes a substrate including at least a first portion of an n-type semiconductor layer, and a mesa structure on the substrate and characterized by a linear lateral dimension equal to or less than about 3 μm. The mesa structure includes a plurality of epitaxial layers, and a conductive distributed Bragg reflector (DBR) on the plurality of epitaxial layers. The conductive DBR includes a plurality of transparent conductive oxide layers and covers between about 80% and about 100% of a full lateral area of the plurality of epitaxial layers. The micro-LED also includes a dielectric layer on sidewalls of the mesa structure, a reflective metal layer on sidewalls of the dielectric layer and electrically coupled to the first portion of the n-type semiconductor layer, and a first metal electrode in direct contact with the conductive DBR.

公开(公告)号：US11508890B2

公开(公告)日：2022-11-22

申请号：US17214727

申请日：2021-03-26

Applicant: Meta Platforms Technologies, LLC

Inventor： Mohsin Aziz ,  Jun-Youn Kim ,  Samir Mezouari ,  Abdul Shakoor ,  James Walker Carswell

IPC: H01L33/60 ,  H01L25/075 ,  G02B27/01 ,  H01L33/50

Abstract: A display device includes a plurality of light emitting diodes (LEDs) having walls that extend through a transparent semiconductor layer and beyond the surface of the transparent semiconductor layer. Each of the walls surrounds at least part of each of the plurality of LEDs to collimate the light emitted by the plurality of LEDs. In some embodiments, the walls collimate the light emitted by the LEDs by reflecting the light or absorbing a portion of the light. The display device may further include an array of optical lenses that faces the surface of the transparent semiconductor layer to further collimate the light emitted from the LEDs.