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    • 4. 发明授权
    • Providing selective via plating using laser resin activation
    • 通过激光树脂激活提供选择性电镀
    • US08528203B2
    • 2013-09-10
    • US13154821
    • 2011-06-07
    • Gregory E. BalcomeBrett P. KrullJoseph KuczynskiTerry G. RyksTimothy J. Tofil
    • Gregory E. BalcomeBrett P. KrullJoseph KuczynskiTerry G. RyksTimothy J. Tofil
    • H01K3/10
    • H05K3/429G06F17/5077H05K1/0251H05K3/4626H05K2201/0209H05K2203/107Y10T29/49126Y10T29/49155Y10T29/49165Y10T156/1057
    • An enhanced mechanism for via stub elimination in printed wiring boards (PWBs) and other substrates employs laser resin activation to provide selective via plating. In one embodiment, the resin used in insulator layers of the PWB contains spinel-based non-conductive metal oxide. Preferably, only insulator layers through which vias will pass contain the metal oxide. Those layers are registered and laser irradiated at via formation locations to break down the metal oxide and release metal nuclei. Once these layers are irradiated, all layers of the PWB or subcomposite are laid up and laminated. The resulting composite or subcomposite is subsequently drilled through and subjected to conventional PWB fabrication processes prior to electroless copper plating and subsequent copper electroplating. Because metal nuclei were released only in the via formation locations of the appropriate layers, plating occurs in the via barrels only along those layers and partially plated vias are created without stubs.
    • 印刷电路板(PWB)和其他基板中通过短截线消除的增强机制采用激光树脂激活来提供选择性通孔电镀。 在一个实施方案中,PWB的绝缘体层中使用的树脂含有尖晶石型非导电金属氧化物。 优选地,仅通孔所通过的绝缘体层将含有金属氧化物。 登记这些层并在通孔形成位置激光照射以分解金属氧化物并释放金属核。 一旦这些层被照射,PWB或亚复合材料的所有层被铺设和层压。 随后在化学镀铜和随后的铜电镀之前,将所得到的复合材料或副复合材料钻穿并经过常规PWB制造工艺。 因为金属核仅在适当层的通孔形成位置中释放,所以仅沿着这些层在通孔桶中进行电镀,并且在没有短截线的情况下产生部分镀覆的通孔。