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    • 2. 发明授权
    • Lead frame having layered conductive planes
    • 引线框架具有分层导电平面
    • US5498901A
    • 1996-03-12
    • US294323
    • 1994-08-23
    • Satya ChillaraShahram Mostafazadeh
    • Satya ChillaraShahram Mostafazadeh
    • H01L23/495
    • H01L24/49H01L23/49531H01L2224/05554H01L2224/48247H01L2224/49109H01L2224/49171H01L24/48H01L2924/00014H01L2924/01005H01L2924/01013H01L2924/01078H01L2924/01082H01L2924/07802H01L2924/14H01L2924/181H01L2924/19041H01L2924/19107H01L2924/30107H01L2924/3011
    • A lead frame having layered conductive planes is disclosed for use in semiconductor devices. The lead frame includes a plurality of long leads each having a lead tip and a plurality of short leads. Electrically conductive layers are attached to the long leads around such that they don't cover the tips of the long leads and are radially inward of the short leads. The conductive layers are insulated from the long lead and each other by adhesive insulating layers. In a preferred embodiment, the top conductive layer has a smaller width than the bottom conducting layer and is positioned to expose an inner and outer ledge on the bottom conducting layer. The exposed outer ledge allows bonding to the shorter leads. The use of shorter leads decreases the amount of inductance in the leads. The conductive layers also may act as capacitors. In one embodiment of the present application the short leads may correspond to ground and/or power leads. The decreased inductance and increased capacitance decreases the impedance seen in the power and ground leads. This allows the semiconductor to operate at higher speeds and consume less power.
    • 公开了一种用于半导体器件的具有分层导电平面的引线框架。 引线框架包括多个长引线,每个引线具有引线端头和多个短引线。 导电层被连接到长引线周围,使得它们不覆盖长引线的尖端并且在短引线的径向内侧。 导电层与长引线绝缘,并且通过粘合绝缘层彼此绝缘。 在优选实施例中,顶部导电层具有比底部导电层更小的宽度,并且定位成暴露底部导电层上的内部和外部凸缘。 暴露的外凸缘允许结合到较短的引线。 使用较短的引线会降低引线中的电感量。 导电层也可以用作电容器。 在本申请的一个实施例中,短引线可对应于接地和/或电源引线。 降低的电感和增加的电容降低了在电源和接地引线中看到的阻抗。 这允许半导体以更高的速度运行并且消耗更少的功率。