公开(公告)号：US10418510B1

公开(公告)日：2019-09-17

申请号：US15853505

申请日：2017-12-22

Applicant: Facebook Technologies, LLC

Inventor： Celine Claire Oyer ,  Allan Pourchet

IPC: H01L33/00 ,  H01L33/38 ,  H01L33/06

Abstract: A method for fabricating a light emitting diode (LED) with a first electrical contact deposited around the side of a layered mesa structure. First, layers of materials are formed. The layers of materials include a first semiconductor layer, a second semiconductor layer, and a light emitting layer between the first and second semiconductor layers for producing light responsive to passing current through the light emitting layer. The formed layers of material are shaped to include a bottom surface, a top surface, and at least one side surface extending from the bottom surface to the top surface. The top surface has a smaller area than the bottom surface. An electrical contact is deposited on the at least one side surface.

公开(公告)号：US10989376B2

公开(公告)日：2021-04-27

申请号：US15824579

申请日：2017-11-28

Applicant: Facebook Technologies, LLC

Inventor： Celine Claire Oyer

IPC: F21S4/24 ,  H01L51/52 ,  H01L25/075 ,  H01L25/00 ,  H01L25/16 ,  H05B45/00 ,  G02B27/01

Abstract: Embodiments relate to fabricating a display device by assembling strips of μLED devices onto a backplane instead of individually picking and placing each μLED device onto the backplane. A strip of first μLED devices is coupled to a set of interconnections on the backplane. Then, the first fabrication substrate is removed from the strip of first μLED devices. A strip of second μLED devices producing another color (e.g., green) is attached to a second fabrication substrate. The strip of second μLED devices is coupled to another set of interconnections on the backplane. The process may be repeated for a strip of third μLED devices producing yet another color (e.g., blue). After attaching the second and third μLED devices, fabrication substrates on the second and third μLED devices are simultaneously removed by laser based lift-off (LLO) method.

公开(公告)号：US10775616B1

公开(公告)日：2020-09-15

申请号：US15927963

申请日：2018-03-21

Applicant: Facebook Technologies, LLC

Inventor： Andrew John Ouderkirk ,  Patrick Joseph Hughes ,  Pooya Saketi ,  Robin Sharma ,  Celine Claire Oyer ,  James Ronald Bonar

IPC: G02B27/00 ,  H01L25/075 ,  H01L33/62 ,  G06F3/01 ,  H01L33/10 ,  H01L33/24

Abstract: A lens assembly includes a plurality of micro-LEDs coupled to one or more circuitries affixed to a surface of a lens substrate. At least one micro-LED is positioned within a viewing region of the lens substrate. The viewing region is a region through which light emitted by an electronic display passes prior to reaching an eyebox. The lens assembly may be part of a head-mounted display (HMD). An eye tracking unit of the HMD includes the one or more micro-LEDs to project light onto a portion of a user's eye and a detector to collect reflected and/or scattered light from the illuminated portion of the eye. The eye tracking unit tracks the movement of the user's eye. Based on the tracked movement, the HMD adjusts presentation of displayed content such as focus and/or resolutions of the displayed content.

公开(公告)号：US10535800B1

公开(公告)日：2020-01-14

申请号：US15880372

申请日：2018-01-25

Applicant: Facebook Technologies, LLC

Inventor： Celine Claire Oyer

IPC: H01L33/10 ,  H01L33/06 ,  H01L33/14 ,  H01L33/24 ,  H01L33/32 ,  H01L33/30 ,  H01L33/40 ,  H01L33/44 ,  H01L33/00

Abstract: A micro-light emitting diode (LED) includes an epitaxial structure having a mesa and a top portion on the mesa. The epitaxial structure further includes quantum wells within the mesa configured to emit light, claddings surrounding the quantum wells, and a light emitting surface on a side opposite the mesa and top portion. A reflective contact is on the top portion of the epitaxial structure. Light emitted from the quantum wells are transmitted through the mesa and the top portion in first directions, and reflected by the reflective contact back through the top portion and the mesa in second directions toward the light emitting surface. The top portion allows the quantum wells to be positioned at a parabola focal point of the mesa without limiting cladding thickness.

公开(公告)号：US11302841B1

公开(公告)日：2022-04-12

申请号：US16801118

申请日：2020-02-25

Applicant: Facebook Technologies, LLC

Inventor： Celine Claire Oyer ,  Allan Pourchet

IPC: H01L33/00 ,  H01L33/06 ,  H01L27/15 ,  H01L33/40

Abstract: Embodiments relate to a method for fabricating a light-emitting-diode (LED). A metal layer is deposited on a p-type semiconductor. The p-type semiconductor is on an n-type semiconductor. The metal layer is patterned to define a p-metal. The p-type semiconductor is etched using the p-metal as an etch mask. Similarly, the n-type semiconductor is etched using the p-metal and the p-type semiconductor as an etch mask to define individual LEDs.

公开(公告)号：US10741717B1

公开(公告)日：2020-08-11

申请号：US16356850

申请日：2019-03-18

Applicant: Facebook Technologies, LLC

Inventor： Celine Claire Oyer ,  David Massoubre ,  Tilman Zehender

IPC: H01L33/00 ,  H01L33/40 ,  H01L33/44 ,  H01L33/32

Abstract: Embodiments relate to a micro light-emitting-diode (μLED) fabricated using a self-aligned process. To fabricate the μLED, a metal layer is deposited on a p-type semiconductor. The p-type semiconductor is on an n-type semiconductor and the n-type semiconductor is on a top side of a substrate. The metal layer is patterned to define a p-metal. The p-type semiconductor is etched using the p-metal as an etch mask. Similarly, the n-type semiconductor is etched using the p-metal and the p-type semiconductor as an etch mask. A negative photoresist layer is deposited over the patterned p-metal and the p-type semiconductor. The negative photoresist is then exposed from the back side of the substrate, thus exposing the regions of the negative photoresist that are not masked by the p-metal. The negative photoresist is then developed to expose the p-metal.

公开(公告)号：US20200127162A1

公开(公告)日：2020-04-23

申请号：US16705194

申请日：2019-12-05

Applicant: Facebook Technologies, LLC

Inventor： Celine Claire Oyer

IPC: H01L33/10 ,  H01L33/06 ,  H01L33/30 ,  H01L33/00 ,  H01L33/44 ,  H01L33/40 ,  H01L33/14 ,  H01L33/24 ,  H01L33/32

Abstract: A micro-light emitting diode (LED) includes an epitaxial structure having a mesa and a top portion on the mesa. The epitaxial structure further includes quantum wells within the mesa configured to emit light, claddings surrounding the quantum wells, and a light emitting surface on a side opposite the mesa and top portion. A reflective contact is on the top portion of the epitaxial structure. Light emitted from the quantum wells are transmitted through the mesa and the top portion in first directions, and reflected by the reflective contact back through the top portion and the mesa in second directions toward the light emitting surface. The top portion allows the quantum wells to be positioned at a parabola focal point of the mesa without limiting cladding thickness.

公开(公告)号：US10854782B2

公开(公告)日：2020-12-01

申请号：US16588737

申请日：2019-09-30

Applicant: Facebook Technologies, LLC

Inventor： Vincent Brennan ,  Christopher Percival ,  Padraig Hughes ,  Allan Pourchet ,  Celine Claire Oyer

IPC: H01L21/00 ,  H01L33/24 ,  H01L33/20 ,  H01L27/15 ,  H01L33/06 ,  H01L33/10 ,  H01L33/32 ,  H01L33/58 ,  H01L33/44 ,  H01L33/46

Abstract: A Light emitting diode (LED) includes a mesa structure, a light emitting source within the mesa structure, and a primary emission surface on a side of the LED opposed to a top of the mesa structure. The light emitting source is configured to emit light anisotropically in a first direction perpendicular to a second direction of emission of the light from the LED at the primary emission surface.

公开(公告)号：US10854781B2

公开(公告)日：2020-12-01

申请号：US16705194

申请日：2019-12-05

Applicant: Facebook Technologies, LLC

Inventor： Celine Claire Oyer

IPC: H01L33/10 ,  H01L33/06 ,  H01L33/30 ,  H01L33/00 ,  H01L33/44 ,  H01L33/40 ,  H01L33/14 ,  H01L33/24 ,  H01L33/32

Abstract: A micro-light emitting diode (LED) includes an epitaxial structure having a mesa and a top portion on the mesa. The epitaxial structure further includes quantum wells within the mesa configured to emit light, claddings surrounding the quantum wells, and a light emitting surface on a side opposite the mesa and top portion. A reflective contact is on the top portion of the epitaxial structure. Light emitted from the quantum wells are transmitted through the mesa and the top portion in first directions, and reflected by the reflective contact back through the top portion and the mesa in second directions toward the light emitting surface. The top portion allows the quantum wells to be positioned at a parabola focal point of the mesa without limiting cladding thickness.

公开(公告)号：US20200044114A1

公开(公告)日：2020-02-06

申请号：US16588737

申请日：2019-09-30

Applicant: Facebook Technologies, LLC

Inventor： Vincent Brennan ,  Christopher Percival ,  Padraig Hughes ,  Allan Pourchet ,  Celine Claire Oyer

IPC: H01L33/24 ,  H01L33/20 ,  H01L27/15 ,  H01L33/06 ,  H01L33/10 ,  H01L33/32 ,  H01L33/58

Abstract: A Light emitting diode (LED) includes a mesa structure, a light emitting source within the mesa structure, and a primary emission surface on a side of the LED opposed to a top of the mesa structure. The light emitting source is configured to emit light anisotropically in a first direction perpendicular to a second direction of emission of the light from the LED at the primary emission surface.