Method of manufacturing a metallised aluminium nitride circuit board
    253.
    发明公开
    Method of manufacturing a metallised aluminium nitride circuit board 失效
    沙尔施塔特阿拉斯铝合金。

    公开(公告)号:EP0310437A1

    公开(公告)日:1989-04-05

    申请号:EP88309137.3

    申请日:1988-09-30

    Abstract: Disclosed is an aluminum nitride circuit board which is advantageously used as a carrier for a part emitting a large volume of heat, the substrate of the circuit board is a sintered aluminum nitride substrate (6) which comprises a basal part (4) and projection (5) rising from the basal part and offering a surface for application of a metallizing composition, a metallized layer (7) thereof is formed on the upper side of the projection by applying the metallizing composition thereon and forming the applied layer of the composition by firing, the metallizing composition applied on the upper side of the projection is prevented from sagging down the lateral side of the basal part owing to the step formed with the projection and the basal part, the preclusion of the otherwise inevitable sagging of the composition contributes greatly to improving the circuit board's voltage withstanding property. Owing to the curved surfaces formed in the rising part (16) of the projection, the edge (14) on the upper side of the projection, and the corner (15) along the edge of the basal part, the production of circuit boards enjoys a very yield and the circuit boards are protected against accidents due to the otherwise possible occurrence of cracks during service.

    Abstract translation: 公开了一种氮化铝电路板,其有利地用作发射大量热量的部件的载体,电路板的基板是烧结氮化铝基板(6),其包括基部(4)和突起( 5)从基底部分上升并提供用于施加金属组合物的表面,其上的金属化层(7)通过在其上施加金属化组合物而形成在突起的上侧,并通过烧制形成组合物的施加层 施加在突起的上侧的金属组合物由于形成有突起和基部的台阶而被阻止在基部的侧面下垂,因此排除组合物的其它不可避免的下垂很大程度上有助于 提高电路板的耐电压性能。 由于在突起的上升部分(16)中形成的弯曲表面,突起的上侧上的边缘(14)和沿着基部边缘的拐角(15),电路板的生产享有 非常收益,并且由于在使用期间可能发生裂缝,电路板被保护以免发生事故。

    WIRING BOARD AND MANUFACTURING METHOD THEREFOR
    254.
    发明公开

    公开(公告)号:US20240357739A1

    公开(公告)日:2024-10-24

    申请号:US18639407

    申请日:2024-04-18

    Inventor: Tomoyuki Ishii

    Abstract: 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.

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