Device layer thin-film transfer to thermally conductive substrate

    公开(公告)号:US10032943B2

    公开(公告)日:2018-07-24

    申请号:US14974643

    申请日:2015-12-18

    Abstract: A semiconductor structure includes a thin-film device layer, an optoelectronic device disposed in the thin-film device layer, and a surrogate substrate permanently attached to the thin film device layer. The surrogate substrate is optically transparent and has a thermal conductivity of at least 300 W/m-K. The optoelectronic device excitable by visible light transmitted through the surrogate substrate. A method of fabricating the semiconductor structure includes fabricating the optoelectronic device in a device layer thin-film of SiC on a silicon wafer of a first diameter, transferring the device layer thin-film of SiC from the silicon wafer, and permanently bonding the device layer thin-film to a SiC surrogate substrate of a second diameter.

    Liquid Crystal Lens With Variable Focal Length
    123.
    发明申请

    公开(公告)号:US20180107090A1

    公开(公告)日:2018-04-19

    申请号:US15845032

    申请日:2017-12-18

    CPC classification number: G02F1/29 G02B3/12 G02F1/13439 G02F1/137

    Abstract: A lens structure includes a transparent cell containing a liquid crystal material. The cell is thicker in a center region thereof than at peripheral regions. The structure further includes transparent electrically conductive electrodes coupled with opposing top and bottom surfaces of the cell and configured to establish an electric field through the cell that is strongest at the peripheral regions where the cell is thinner relative to the center region so that a value of the index of refraction of the liquid crystal material changes across the cell from the center region towards the peripheral regions to change an effective focal length of the lens structure. In some embodiments the top surface of the cell has a first curvature C1 and the bottom surface of the cell has a second curvature C2 that differs from the first curvature.

    PROBE STRUCTURE FOR PHYSIOLOGICAL MEASUREMENTS USING SURFACE ENHANCED RAMAN SPECTROSCOPY

    公开(公告)号:US20180103848A1

    公开(公告)日:2018-04-19

    申请号:US15293267

    申请日:2016-10-13

    Abstract: Surface enhanced Raman spectroscopy is employed to obtain chemical data with respect to body tissue and cells. The chemical environments of stimulation implants and drug-delivery catheters are spectroscopically monitored in real time using an implantable probe. The probe includes a surface enhancer that facilitates surface enhanced Raman spectroscopy in opposing relation to an array of optical fibers. Light emitted by the optical fibers can be employed for chemical detection and/or tissue stimulation. Wavelength and optical power are selected based on whether the probe is employed for such detection or stimulation. Fabrication of a probe assembly that enables surface enhanced Raman spectroscopy is further disclosed.

    Low cost hermetic micro-electronics
    130.
    发明授权

    公开(公告)号:US09820395B2

    公开(公告)日:2017-11-14

    申请号:US15212330

    申请日:2016-07-18

    Abstract: A hermetically sealed electronic device and method of fabrication are provided. A base layer of a wafer is created using a substrate formed from ultra-thin glass or ceramic using panel or roll to roll processing. One or more layers are bonded to the base layer. The wafer is singulated into a plurality of electronic devices having a top surface and a plurality of sides. A hermetic sealant is applied to each electronic device to completely encase the top surface and the sides while bonding to the base layer. At least one of the layers is a metallization layer formed by metal deposition. Full metallization may be applied over the entire wafer and a pattern subsequently transferred to the full metallization by one of laser and chemical etching. The electronic device may further include at least one electronic component attached to one of the layers and encased by the hermetic sealant.

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