METHOD FOR PRODUCING FLEXIBLE PRINTED WIRING BOARD

    公开(公告)号:US20240365469A1

    公开(公告)日:2024-10-31

    申请号:US18566430

    申请日:2022-04-22

    摘要: A method for producing a flexible printed wiring board using a photoresist includes placing the photoresist, including a first region and a second region, on a substrate, placing a first photomask including a first light-transmitting portion such that the first light-transmitting portion faces the first region to expose the photoresist through the first light-transmitting portion, and placing a second photomask including a second light-transmitting portion such that the second light-transmitting portion faces the second region to expose the photoresist through the second light-transmitting portion. The first region is adjacent to the second region such that an edge portion of the first region overlaps an edge portion of the second region. The first light-transmitting portion has a linear shape including a first tip having a tapered shape.

    WIRING BOARD AND MANUFACTURING METHOD THEREFOR

    公开(公告)号:US20240357739A1

    公开(公告)日:2024-10-24

    申请号:US18639407

    申请日:2024-04-18

    发明人: Tomoyuki Ishii

    IPC分类号: H05K1/03 H05K3/00 H05K3/46

    摘要: A wiring board includes: a substrate; a first seed layer provided on the substrate; a first conductive layer provided on the first seed layer; a first insulating layer provided on the first conductive layer; a second seed layer provided on the first insulating layer; and a second conductive layer provided on the second seed layer. An area of the first insulating layer is smaller than an area of the first conductive layer. An area of the second conductive layer is smaller than the area of the first insulating layer. A region of the first insulating layer not overlapping the second conductive layer includes a first region surrounding the second conductive layer and a second region outside the first region. A surface roughness of the second region is larger than a surface roughness of the first region.