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公开(公告)号：US20240021759A1
公开(公告)日：2024-01-18
申请号：US17864883
申请日：2022-07-14
发明人： Samir MEZOUARI , Andrea PINOS , Wei Sin TAN , John Lyle WHITEMAN
CPC分类号： H01L33/504 , H01L27/156 , H01L33/06 , H01L33/325 , H01L33/24 , H01L33/0075 , H01L2933/0041
摘要： A light source includes a substrate, an array of semiconductor structures grown on the substrate, and multi-color micro-LEDs grown on surfaces of the array of semiconductor structures. Each semiconductor structure of the array of semiconductor structures has a shape of a truncated pyramid. The light source includes multiple sets of micro-LEDs formed on top surfaces of multiple sets of semiconductor structures of the array of semiconductor structures, or formed on the top surfaces and/or multiple sidewall surfaces of the array of semiconductor structures. The multiple sets of micro-LEDs are configured to emit light of multiple colors.
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公开(公告)号：US20230207606A1
公开(公告)日：2023-06-29
申请号：US17564212
申请日：2021-12-29
发明人： Samir MEZOUARI , Andrea PINOS , Wei Sin TAN
CPC分类号： H01L27/156 , H01L33/32 , H01L33/42 , H01L33/10
摘要： Disclosed herein are techniques for extracting and collimating light emitted by a light emitting diode (LED). According to certain embodiments, a device includes an LED configured to emit light in a first wavelength range, and an angle-dependent optical filter optically coupled to the LED. A transmission (or reflection) wavelength range of the angle-dependent optical filter varies with an angle of incidence (AOI) of the light incident on the angle-dependent optical filter, such that the angle-dependent optical filter transmits most of light emitted from the LED and having small AOIs, and reflects most of light emitted from the LED and having large AOIs, thereby reducing the divergence angle of the emitted light.
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公开(公告)号：US20230163156A1
公开(公告)日：2023-05-25
申请号：US17534806
申请日：2021-11-24
发明人： Wei Sin TAN , Andrea PINOS , Samir MEZOUARI , John Lyle WHITEMAN
CPC分类号： H01L27/156 , H01L33/24 , H01L33/42 , H01L33/46 , H01L24/08 , H01L24/80 , H01L33/62 , H01L33/005 , H01L2224/08145 , H01L2224/80895 , H01L2224/80896 , H01L2924/12041 , H01L2924/1426 , H01L2933/0016 , H01L2933/0025 , H01L2933/0066
摘要： Disclosed herein are a light source for a display system and methods of fabricating the light source. The light source includes a backplane wafer including a first bonding layer that includes an array of pixel contact pads in a first dielectric layer; a second bonding layer including an array of small metal contact pads in a second dielectric layer; and an array of mesa structures on the second bonding layer and configured to emit light. The second dielectric layer is bonded to the first dielectric layer such that each pixel contact pad of the array of pixel contact pads is in contact with two or more small metal contact pads that are electrically coupled to a same mesa structure of the array of mesa structures.
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公开(公告)号：US20230282789A1
公开(公告)日：2023-09-07
申请号：US17681241
申请日：2022-02-25
IPC分类号： H01L33/60 , H01L25/075 , H01L33/00
CPC分类号： H01L33/60 , H01L25/0753 , H01L33/005 , G02B27/0172
摘要： A light source comprises a backplane wafer with electrical circuits fabricated thereon, and an array of LEDs coupled to the backplane wafer. Each LED of the array of LEDs comprises a mesa structure including semiconductor epitaxial layers and characterized by inwardly tilted mesa sidewalls, a high-refractive index material region (e.g., with a refractive index greater than about 1.75, such as equal to or greater than a refractive index of the semiconductor epitaxial layers) surrounding the semiconductor epitaxial layers of the mesa structure and including outwardly tilted sidewalls, and a reflective layer on the outwardly tilted sidewalls of the high-refractive index material region. In one example, each LED of the array of LEDs also include a passivation layer on the inwardly tilted mesa sidewalls of the mesa structure.
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公开(公告)号：US20230282680A1
公开(公告)日：2023-09-07
申请号：US17675904
申请日：2022-02-18
发明人： Andrea PINOS , Wei Sin TAN , Samir MEZOUARI , Jonathan David Neale SHIPP , Steven Ramos CARNEIRO , Keith Richard STRICKLAND
CPC分类号： H01L27/156 , G02B27/0172 , G06F1/163 , G02B2027/0178
摘要： A light source includes an array of micro-light emitting diodes (micro-LEDs) configured to emit light, a first semiconductor layer on the array of micro-LEDs and including porous structures formed therein to diffuse the light emitted by the array of micro-LEDs, and a second semiconductor layer on the first semiconductor layer. The second semiconductor layer includes a flat surface opposing the first semiconductor layer and is configured to couple the light diffused by the porous structures out of the light source through the flat surface.
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公开(公告)号：US20220384516A1
公开(公告)日：2022-12-01
申请号：US17332616
申请日：2021-05-27
发明人： Wei Sin TAN , Samir MEZOUARI , Andrea PINOS , John Lyle WHITEMAN
摘要： Disclosed herein are light emitting diode devices having one or more high reflectivity mesa sidewall electrodes and methods of fabricating thereof.
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公开(公告)号：US20230369535A1
公开(公告)日：2023-11-16
申请号：US17741245
申请日：2022-05-10
发明人： Wei Sin TAN , Andrea PINOS , Samir MEZOUARI
IPC分类号： H01L33/06 , H01L25/075 , H01L33/00 , H01L33/58
CPC分类号： H01L33/06 , H01L25/0753 , H01L33/0095 , H01L33/58 , G02B27/0172
摘要： A light source includes an array of core-shell nanowire micro-LEDs. Each core-shell nanowire micro-LED includes: a first semiconductor epitaxial layer including a nanowire core formed therein; a first dielectric material layer in physical contact with and surrounding sidewalls of a bottom portion of the nanowire core, or in physical contact with a bottom surface of the nanowire core; a second dielectric material layer in physical contact with a top surface of the nanowire core; active layers grown only on sidewalls of the nanowire core and configured to emit visible light; and a second semiconductor layer grown on the active layers, where the nanowire core and the second semiconductor layer are oppositely doped.
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公开(公告)号：US20230352466A1
公开(公告)日：2023-11-02
申请号：US17732093
申请日：2022-04-28
CPC分类号： H01L25/18 , G02B3/0037 , H01L25/167 , H01L33/20 , H01L33/58 , H01L33/0093 , H01L25/50 , H01L33/0095 , G02B2027/0178
摘要： A light source includes a backplane including electrical circuits fabricated thereon, an array of micro-light emitting diodes (micro-LEDs) bonded to the backplane and configured to emit visible light, and an array of micro-lenses aligned with the array of micro-LEDs and configured to collimate the visible light emitted by the array of micro-LEDs. Each micro-lens of the array of micro-lenses has a plurality of discrete thickness levels. A pitch of the array of micro-lenses is equal to or less than about 5 μm, such as about 2 μm. The pitch of the array of micro-lenses can be the same as or different from the pitch of the array of micro-LEDs.
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公开(公告)号：US20230130445A1
公开(公告)日：2023-04-27
申请号：US17510282
申请日：2021-10-25
发明人： Wei Sin TAN , Andrea PINOS , Xiang YU , Samir MEZOUARI
IPC分类号： H01L33/24 , H01L25/075 , H01L33/06 , H01L33/14 , H01L33/18 , H01L33/32 , H01L33/40 , H01L33/62 , H01L33/00
摘要： A light emitting diode includes an n-type semiconductor layer including a pit structure formed therein, active layers grown only on sidewalls of the pit structure and configured to emit light, and a p-type semiconductor layer on the active layers and at least partially in the pit structure. In one embodiment, the pit structure is characterized by a shape of an inverted pyramid. The pit structure is formed in the n-type semiconductor layer by, for example, etching the n-type semiconductor layer using an etch mask layer having apertures with slanted sidewalls, or growing the n-type semiconductor layer on a substrate through a mask layer having an array of apertures.
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公开(公告)号：US20220384395A1
公开(公告)日：2022-12-01
申请号：US17332621
申请日：2021-05-27
发明人： Wei Sin TAN , Samir MEZOUARI , Andrea PINOS , John Lyle WHITEMAN
IPC分类号： H01L25/075 , H01L33/42 , H01L33/46 , H01L33/00
摘要： Disclosed herein are light emitting diode devices having one or more high reflectivity wide bonding pad electrodes and methods of fabricating thereof.
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