Direct-bonded LED structure contacts and substrate contacts

    公开(公告)号:US11329034B2

    公开(公告)日:2022-05-10

    申请号:US16840245

    申请日:2020-04-03

    Abstract: Direct-bonded LED arrays and applications are provided. An example process fabricates a LED structure that includes coplanar electrical contacts for p-type and n-type semiconductors of the LED structure on a flat bonding interface surface of the LED structure. The coplanar electrical contacts of the flat bonding interface surface are direct-bonded to electrical contacts of a driver circuit for the LED structure. In a wafer-level process, micro-LED structures are fabricated on a first wafer, including coplanar electrical contacts for p-type and n-type semiconductors of the LED structures on the flat bonding interface surfaces of the wafer. At least the coplanar electrical contacts of the flat bonding interface are direct-bonded to electrical contacts of CMOS driver circuits on a second wafer. The process provides a transparent and flexible micro-LED array display, with each micro-LED structure having an illumination area approximately the size of a pixel or a smallest controllable element of an image represented on a high-resolution video display.

    Stretchable film assembly with conductive traces

    公开(公告)号:US10955671B2

    公开(公告)日:2021-03-23

    申请号:US16136776

    申请日:2018-09-20

    Abstract: Apparatus and method relating generally to electronics are disclosed. In one such an apparatus, a film assembly has an upper surface and a lower surface opposite the upper surface. A dielectric film of the film assembly has a structured profile along the upper surface or the lower surface for having alternating ridges and grooves in a corrugated section in an at rest state of the film assembly. Conductive traces of the film assembly conform to the upper surface or the lower surface in or on the dielectric film in the corrugated section.

    DIRECT-BONDED LED ARRAYS AND APPLICATIONS
    6.
    发明申请

    公开(公告)号:US20200235085A1

    公开(公告)日:2020-07-23

    申请号:US16840245

    申请日:2020-04-03

    Abstract: Direct-bonded LED arrays and applications are provided. An example process fabricates a LED structure that includes coplanar electrical contacts for p-type and n-type semiconductors of the LED structure on a flat bonding interface surface of the LED structure. The coplanar electrical contacts of the flat bonding interface surface are direct-bonded to electrical contacts of a driver circuit for the LED structure. In a wafer-level process, micro-LED structures are fabricated on a first wafer, including coplanar electrical contacts for p-type and n-type semiconductors of the LED structures on the flat bonding interface surfaces of the wafer. At least the coplanar electrical contacts of the flat bonding interface are direct-bonded to electrical contacts of CMOS driver circuits on a second wafer. The process provides a transparent and flexible micro-LED array display, with each micro-LED structure having an illumination area approximately the size of a pixel or a smallest controllable element of an image represented on a high-resolution video display.

    Direct-Bonded LED Arrays and Applications
    7.
    发明申请

    公开(公告)号:US20190088633A1

    公开(公告)日:2019-03-21

    申请号:US15919570

    申请日:2018-03-13

    Abstract: Direct-bonded LED arrays and applications are provided. An example process fabricates a LED structure that includes coplanar electrical contacts for p-type and n-type semiconductors of the LED structure on a flat bonding interface surface of the LED structure. The coplanar electrical contacts of the flat bonding interface surface are direct-bonded to electrical contacts of a driver circuit for the LED structure. In a wafer-level process, micro-LED structures are fabricated on a first wafer, including coplanar electrical contacts for p-type and n-type semiconductors of the LED structures on the flat bonding interface surfaces of the wafer. At least the coplanar electrical contacts of the flat bonding interface are direct-bonded to electrical contacts of CMOS driver circuits on a second wafer. The process provides a transparent and flexible micro-LED array display, with each micro-LED structure having an illumination area approximately the size of a pixel or a smallest controllable element of an image represented on a high-resolution video display.

    Multi-surface edge pads for vertical mount packages and methods of making package stacks

    公开(公告)号:US10354945B2

    公开(公告)日:2019-07-16

    申请号:US15660718

    申请日:2017-07-26

    Abstract: Multi-surface edge pads for vertical mount packages and methods of making package stacks are provided. Example substrates for vertical surface mount to a motherboard have multi-surface edge pads. The vertical mount substrates may be those of a laminate-based FlipNAND. The multi-surface edge pads have cutouts or recesses that expose more surfaces and more surface area of the substrate for bonding with the motherboard. The cutouts in the edge pads allow more solder to be used between the attachment surface of the substrate and the motherboard. The placement and geometry of the resulting solder joint is stronger and has less internal stress than conventional solder joints for vertical mounting. In an example process, blind holes can be drilled into a thickness of a substrate, and the blind holes plated with metal. The substrate can be cut in half though the plated holes to provide two substrates with plated multi-surface edge pads including the cutouts for mounting to the motherboard.

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