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    • 50. 发明授权
    • O-ring package
    • O型圈包装
    • US5185653A
    • 1993-02-09
    • US661962
    • 1991-02-28
    • Andrew P. SwitkyChok J. Chia
    • Andrew P. SwitkyChok J. Chia
    • H01L21/50H01L23/057H01L23/16H01L23/495
    • H01L21/50H01L23/057H01L23/16H01L23/49558H01L2224/45124H01L2224/48091H01L2224/48247H01L24/45H01L24/48H01L2924/12042H01L2924/14H01L2924/15747
    • A transfer molded plastic package having a cavity for accommodating a semiconductor chip is disclosed. A leadframe assembly process is shown wherein the leadframe finger pattern is provided with a resilient or elastic O-ring bead. Top and bottom housing plates which have dimensions that are larger than the bead form the upper and lower surfaces of the package. These plates can be formed of any suitably rigid material. They may be composed of ceramic in low power devices. For high power operation at least one metal plate can be employed. The chip or chips are connected to the lead frame and, along with the top and bottom plates, is located in a transfer mold. The plates are in registy and located so that their outer edges extend beyond the O-ring bead. The mold cavities include faces which press against the plates which are held apart by the O-ring bead so that the bead is compressed by the mold closure. A plastic encapsulant is molded around the periphery of the plates so that the leadframe fingers are secured therein to become package pins.
    • 公开了一种具有用于容纳半导体芯片的空腔的转移模制塑料封装。 示出了引线框架组装过程,其中引线框指状图案设置有弹性或弹性O形环珠。 具有大于珠的尺寸的顶部和底部壳体板形成包装的上表面和下表面。 这些板可以由任何适当刚性的材料形成。 它们可以由低功率器件中的陶瓷组成。 对于大功率操作,可以使用至少一个金属板。 芯片或芯片连接到引线框架,并且与顶板和底板一起位于转移模具中。 板被配准并且定位成使得它们的外边缘延伸超过O形圈珠。 模具腔包括压靠在板上的面,这些面被O形圈珠保持分开,使得胎圈被模具盖压缩。 围绕板的周边模塑塑料密封剂,使得引线框架指状物固定在其中以成为封装销。