PRINTED WIRING BOARD
    27.
    发明申请

    公开(公告)号:US20170196084A1

    公开(公告)日:2017-07-06

    申请号:US15398778

    申请日:2017-01-05

    Abstract: A printed wiring board includes a first insulating layer, a second conductor layer including first and second circuits, a second insulating layer covering the second conductor layer on the first insulating layer, a third conductor layer including first and second circuits, a third insulating layer covering the third conductor layer on the second insulating layer, a fourth conductor layer including first circuit, a second via conductor connecting the first circuits in the second and third conductor layers through the second insulating layer, and a first skip via conductor penetrating through the second circuit in the third conductor layer and connecting the second circuit in the second conductor layer and the first circuit in the fourth conductor layer through the second and third insulating layers. The second and third conductor layers are formed such that the second conductor layer has thickness t2 larger than thickness t3 of the third conductor layer.

    ELECTRONIC APPARATUS WITH SURGE VOLTAGE PROTECTION FUNCTION

    公开(公告)号:US20240313525A1

    公开(公告)日:2024-09-19

    申请号:US18198137

    申请日:2023-05-16

    Abstract: An electronic apparatus includes a printed circuit board, a terminal and a surge voltage protection structure. The printed circuit board includes a first plated through hole, a second plated through hole and a ground terminal. The surge voltage protection structure includes the first plated through hole and the second plated through hole. The first plated through hole is electrically connected to the terminal. The second plated through hole is connected to the ground terminal. A gap is defined between the first plated through hole and the second plated through hole. The first plated through hole receives a surge voltage to generate an electric arc across the gap and transmit the electric arc through the gap to the second plated through hole, so that the second plated through hole receives the electric arc to transfer an energy of the electric arc to the ground terminal.

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