Package with integrated wick layer and method for heat removal
    3.
    发明授权
    Package with integrated wick layer and method for heat removal 有权
    具有集成芯吸层的封装和散热方法

    公开(公告)号:US07095111B2

    公开(公告)日:2006-08-22

    申请号:US10403645

    申请日:2003-03-31

    IPC分类号: H01L23/34

    摘要: A package for a die includes a porous wick layer disposed between the die and a substrate. A sealed chamber between the die and substrate includes a phase-change fluid to transfer heat from a substrate side of the die to a heat spreader. Interconnects coupling bonding pads of the die to the substrate may pass through the chamber and through vias in the wick layer. In embodiments, the wick layer may have a coefficient of thermal expansion (CTE) matching a CTE of the die of the heat spreader. Heat generated by the die may evaporate the fluid in a die region and the evaporated fluid may condense in a heat spreader region. The wick layer returns the condensed fluid from the heat spreader region to the die region to complete the cycle. The fluid may be non-corrosive with respect to the interconnects and may be an electrical insulator. In embodiments, the wick layer in the heat spreader region may be disposed on the heat spreader in a pattern to efficiently draw the condensed fluid to the die region. In other embodiments, the wick layer may comprise materials of different pore size and porosity to efficiently draw the condensed fluid to the die region.

    摘要翻译: 用于管芯的封装包括设置在管芯和基板之间的多孔芯层。 模具和衬底之间的密封腔室包括相互转换流体,以将热量从模具的衬底侧传递到散热器。 将管芯的接合焊盘耦合到衬底的互连可以穿过腔室并穿过芯层中的通孔。 在实施例中,芯吸层可以具有与散热器的管芯的CTE匹配的热膨胀系数(CTE)。 由模具产生的热量可能使模具区域中的流体蒸发并且蒸发的流体可以在散热器区域中冷凝。 芯层将冷凝流体从散热器区域返回到模具区域以完成循环。 流体相对于互连件可以是非腐蚀性的并且可以是电绝缘体。 在实施例中,散热器区域中的芯吸层可以以图案方式设置在散热器上,以有效地将冷凝的流体抽吸到管芯区域。 在其它实施例中,芯层可以包括不同孔径和孔隙率的材料,以有效地将冷凝的流体抽吸到模具区域。