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    • 5. 发明申请
    • LAYERED STRUCTURE AND PHOTOSENSITIVE DRY FILM TO BE USED THEREFOR
    • 使用的层状结构和感光干膜
    • US20120301825A1
    • 2012-11-29
    • US13569715
    • 2012-08-08
    • Takahiro YOSHIDAShouji MinegishiMasao Arima
    • Takahiro YOSHIDAShouji MinegishiMasao Arima
    • G03F7/004
    • G03F7/095G03F7/0047H05K3/287H05K3/3452H05K2201/0195H05K2201/0209H05K2201/0269
    • In a layered structure having at least a substrate and a photosensitive resin layer or cured film layer formed on the substrate and containing an inorganic filler, the content of the inorganic filler in the photosensitive resin layer or cured film layer is lower in a surface layer region away from the substrate than in other region, so that a linear thermal expansion coefficient of the layer as a whole is maintained as low as possible. Preferably, the photosensitive resin layer or cured film layer comprises at least two layers having different inorganic filler contents, wherein the inorganic filler content in the layer on the surface side away from the substrate is lower than the inorganic filler content in the other layer. A photosensitive dry film containing the photosensitive resin layer is suitable for use as a solder resist or an interlayer resin insulation layer of a printed wiring board.
    • 在至少具有基板和形成在基板上并含有无机填料的感光性树脂层或固化膜层的分层结构中,感光性树脂层或固化膜层中的无机填料的含量在表面层区域 远离衬底而不是在其他区域,使得整个层的线性热膨胀系数保持尽可能低。 优选地,感光性树脂层或固化膜层包含至少两层具有不同无机填料含量的层,其中离开基材的表面侧的层中的无机填料含量低于另一层中的无机填料含量。 含有感光性树脂层的感光性干膜适合用作印刷电路板的阻焊剂或层间树脂绝缘层。
    • 7. 发明申请
    • DRY FILM AND MULTILAYER PRINTED WIRING BOARD
    • 干膜和多层印刷接线板
    • US20110278053A1
    • 2011-11-17
    • US13195802
    • 2011-08-01
    • Makoto HAYASHIKoshin NakaiKatsuto Murata
    • Makoto HAYASHIKoshin NakaiKatsuto Murata
    • H05K1/03C08L63/00
    • H05K3/4661C08G59/38C08L63/00H05K3/381H05K2201/0209C08L2666/22
    • A dry film includes a supporting base film and a thin membrane of a thermosetting resin composition. The thin membrane of the thermosetting resin composition is formed on the supporting base film. The thermosetting resin composition includes a liquid epoxy resin, a solid epoxy resin, a semisolid epoxy resin, an epoxy curing agent and a filler. The liquid epoxy resin is liquid at 20° C. and has at least two epoxy groups in a molecule. The solid epoxy resin is solid at 40° C. and has at least three epoxy groups in a molecule. The semisolid epoxy resin is solid at 20° C. and liquid at 40° C. and has at least two epoxy groups in a molecule. A ratio of mass of the liquid epoxy resin to a sum of mass of the solid epoxy resin and mass of the semisolid epoxy resin is about 1:1 to about 1:10 A ratio of the mass of the solid epoxy resin to the mass of the semisolid epoxy resin is about 1:0.5 to about 1:2.
    • 干膜包括支撑基膜和热固性树脂组合物的薄膜。 热固性树脂组合物的薄膜形成在支撑基底膜上。 热固性树脂组合物包括液体环氧树脂,固体环氧树脂,半固体环氧树脂,环氧固化剂和填料。 液体环氧树脂在20℃下为液体,在分子中具有至少两个环氧基。 固体环氧树脂在40℃是固体,在分子中具有至少三个环氧基团。 半固态环氧树脂在20℃为固体,在40℃为液体,在分子中具有至少两个环氧基。 液体环氧树脂的质量与固体环氧树脂的质量之和与半固态环氧树脂的质量之比为约1:1至约1:10A,固体环氧树脂的质量与质量的比例为 半固体环氧树脂为约1:0.5至约1:2。