ELECTRONIC MOUNTING SUBSTRATE AND ELECTRONIC DEVICE

    公开(公告)号:US20230232536A1

    公开(公告)日:2023-07-20

    申请号:US18188997

    申请日:2023-03-23

    Abstract: An electronic element mounting substrate includes a first substrate that has a first main surface, has a rectangular shape, and has a mounting portion for an electronic element on the first main surface, and a second substrate that is located on a second main surface opposite to the first main surface, is made of a carbon material, has a rectangular shape, has a third main surface facing the second main surface and a fourth main surface opposite to the third main surface, in which the third main surface or the fourth main surface has heat conduction in a longitudinal direction greater than heat conduction in a direction perpendicular to the longitudinal direction, and that has a recessed portion on the fourth main surface.

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