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    • 13. 发明授权
    • Self-positioning heat spreader
    • 自动定位散热器
    • US4541005A
    • 1985-09-10
    • US595646
    • 1984-04-02
    • William L. HunterPaul R. Theobald
    • William L. HunterPaul R. Theobald
    • H01L23/367H01L23/433H01L23/30H01L23/36
    • H01L23/3672H01L23/4334H01L2924/0002H01L2924/3011
    • A heat spreader which is self-positioning into a mold cavity prior to encapsulation in plastic is provided. To minimize capacitance between the spreader and a metal lead frame having a semiconductor die mounted thereon, the heat spreader has a frame with notches in the opposite ends which define bifurcated limbs. Lateral standoffs extend from each of the sides thereof and feet extend from the bottom surface thereof. A central portion extends a predetermined distance from the top surface thereof for intimate positioning with the lead frame. The standoffs, limbs and feet are sized to firmly position the heat spreader upon insertion into the mold cavity. To maintain substantially constant capacitance between the spreader and the lead frame from part to part, each bifurcated limb has an inner edge which complements or conforms to the portion of the lead frame which will overlay the limb in the encapsulated plastic.
    • 提供了一种在塑料封装之前自定位到模腔中的散热器。 为了使撒布机和安装有半导体管芯的金属引线框架之间的电容最小化,散热器在相对端具有限定分叉的四肢的具有凹口的框架。 横向间隔从其每侧延伸,并且脚从其底表面延伸。 中心部分从其顶表面延伸预定距离以便与引线框紧密定位。 支座,四肢和脚的尺寸设置成在放入模腔时牢固地定位散热器。 为了在一部分之间保持吊具和引线框架之间的基本上恒定的电容,每个分叉的肢体具有补充或符合引线框架部分的内边缘,该部分将覆盖封装塑料中的肢体。