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    • 2. 发明授权
    • Low-stress compressive heatsink structure
    • 低应力压缩散热器结构
    • US06654250B1
    • 2003-11-25
    • US10254886
    • 2002-09-25
    • David James Alcoe
    • David James Alcoe
    • H05K720
    • H05K1/189H05K2201/10734H05K2201/2009
    • A structure and technique for forming an I/C chip module and circuit card construction is provided. An I/C chip module having a flexible substrate, with first and second opposite sides concave, results from the CTE mismatch between the I/C chip and substrate. The I/C chip module is mounted on a flexible circuit card by solderball connection. The curvature of the I/C chip module causes the circuit card to curve correspondingly. A heatsink in thermal contact with the I/C chip places pressure on the I/C chip module in a direction to decrease the curvature. A rigid backing member retains the circuit card, generating a curved space between the backing member and the circuit card. A leaf spring applies pressure to the I/C chip module against the backing member. A compliant member is interposed between the backing member and the circuit board filling a portion of the curved space therebetween.
    • 提供了用于形成I / C芯片模块和电路卡结构的结构和技术。 具有柔性衬底的I / C芯片模块,其具有第一和第二相对侧凹陷,由I / C芯片和衬底之间的CTE不匹配产生。 I / C芯片模块通过焊球连接安装在柔性电路卡上。 I / C芯片模块的曲率使电路卡相应地曲线。 与I / C芯片热接触的散热片沿着减小曲率的方向对I / C芯片模块施加压力。 刚性背衬构件保持电路卡,在背衬构件和电路卡之间产生弯曲的空间。 板簧对I / C芯片模块施加压力抵靠背衬构件。 柔性构件插入在衬垫构件和电路板之间,填充其间的弯曲空间的一部分。