Printed wiring board and method for manufacturing printed wiring board

    公开(公告)号:US11917756B2

    公开(公告)日:2024-02-27

    申请号:US17485672

    申请日:2021-09-27

    Inventor: Yuji Ikawa

    CPC classification number: H05K1/09 H05K3/0041 H05K3/062 H05K3/4632 H05K3/0079

    Abstract: A method for manufacturing a printed wiring board includes forming metal posts on a conductor circuit formed on a resin insulating layer, forming the outermost resin layer on the resin insulating layer such that the metal posts is embedded in the outermost resin layer, forming a mask at a dam formation site for a dam structure of the outermost resin layer to surround at least part of a pad group including the metal posts on the outermost resin layer, and reducing a thickness of the outermost resin layer exposed from the mask such that end portions of the metal posts are exposed from the outermost resin layer, that the metal posts form the pad group, and that the outermost resin layer has the dam structure forming part of the outermost resin layer and formed to surround at least part of the pad group including the metal posts.

    WAFER-LEVEL MANUFACTURING METHOD FOR EMBEDDING PASSIVE ELEMENT IN GLASS SUBSTRATE

    公开(公告)号:US20170280566A1

    公开(公告)日:2017-09-28

    申请号:US15619525

    申请日:2017-06-11

    Abstract: A wafer-level manufacturing method for embedding a passive element in a glass substrate is disclosed. A highly doped silicon wafer is dry etched to form a highly doped silicon mould wafer, containing highly doped silicon passive component structures mould seated in cavity arrays; a glass wafer is anodically bonded to the highly doped silicon mould wafer in vacuum pressure to seal the cavity arrays; the bonded wafers are heated so that the glass melts and fills gaps in the cavity arrays, annealing and cooling are performed, and a reflowed wafer is formed; the upper glass substrate of the reflowed wafer is grinded and polished to expose the highly doped silicon passives; the passive component structure mould embedded in the glass substrate is fully etched; the blind holes formed in the glass substrates after the passive component structure mould has been etched is filled with copper by electroplating; the highly doped silicon substrate and unetched silicon between the cavity arrays are etched, and several glass substrates embedded with a passive element are obtained; to form electrodes for the passives, a metal adhesion layer is deposited, and a metal conductive layer is electroplated. The process is simple, costs are low, and the prepared passive elements have superior performance.

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