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    • 2. 发明申请
    • PRINTED WIRING BOARD
    • 印刷线路板
    • US20130221505A1
    • 2013-08-29
    • US13598751
    • 2012-08-30
    • Toshiki FURUTANITakeshi Furusawa
    • Toshiki FURUTANITakeshi Furusawa
    • H01L23/495
    • H01L23/49541H01L23/49822H01L23/49827H01L23/49838H01L2224/16225H01L2924/15311H01L2924/3511
    • A printed wiring board includes a substrate, a first buildup formed on a first surface of the substrate and including the outermost conductive layer, and a second buildup layer formed on a second surface of the substrate and including the outermost conductive layer. The outermost layer of the first buildup has pads positioned to connect a semiconductor component, the first buildup has a component mounting region directly under the component such that the outermost layer of the first buildup has a portion in the region, the outermost layer of the second buildup has a portion directly under the region, and the portions satisfy the ratio in the range of from 1.1 to 1.35, where the ratio is obtained by dividing a planar area of the portion of the second buildup by a planar area of the portion of the first buildup.
    • 印刷布线板包括基板,形成在基板的第一表面上并且包括最外面的导电层的第一累积物和形成在基板的第二表面上并且包括最外面导电层的第二累积层。 第一堆积的最外层具有定位成连接半导体部件的焊盘,第一堆积具有直接在部件下方的部件安装区域,使得第一堆积物的最外层具有该区域中的一部分,第二部分的最外层 积聚部分具有直接在该区域下方的部分,并且这些部分满足在1.1至1.35范围内的比率,其中通过将第二聚集部分的平面面积除以该部分的平面面积获得的比例 第一次积累