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    • 32. 发明授权
    • Method of cooling a packaged electronic device
    • 冷却电子装置的方法
    • US5568683A
    • 1996-10-29
    • US472320
    • 1995-06-07
    • Chok J. ChiaManian AlagaratnamQwai H. LowSeng-Sooi Lim
    • Chok J. ChiaManian AlagaratnamQwai H. LowSeng-Sooi Lim
    • F02F7/00H01L23/367H01L23/40H05K3/30
    • H01L23/40F02F7/00H01L23/3675H01L2924/0002Y10T29/4913
    • A removable heatsink assembly comprised of a heatsink unit and a heatspreader is provided. The heatsink unit has at least one fin and a coupling collar for radiating heat away from a packaged electronic device. The heatspreader includes a platform attached to an inner collar in thermal contact with the packaged electronic device. The platform has one or more tabs suitable for mating with one or more flanges located on the coupling collar of the heatsink unit. Coupling grooves within the flanges engage the platform of the heatspreader when the flanges are mated with the heatspreader tabs and the heatsink is turned. The heatsink can therefore be quickly and conveniently attached to or removed from the heatspreader. The present invention thus permits a wide variety of different heatsinks to be interchangeably used with a single heatspreader attached to an electronic device package.
    • 提供了由散热器单元和散热器组成的可拆卸的散热器组件。 散热器单元具有至少一个翅片和用于从封装的电子设备辐射热量的联接套环。 散热器包括附接到与封装的电子设备热接触的内部套环的平台。 该平台具有一个或多个适合于与位于散热器单元的联接环上的一个或多个凸缘相配合的凸片。 当凸缘与散热片接头配合并且散热片转动时,凸缘内的耦合凹槽接合散热器的平台。 因此,散热器可以快速方便地附接到散热器或从散热器移除。 因此,本发明允许各种不同的散热器与附接到电子设备封装的单个散热器可互换地使用。
    • 33. 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。
    • 34. 发明授权
    • Molded pin grid array package GPT
    • 模压针阵列封装GPT
    • US4688152A
    • 1987-08-18
    • US895395
    • 1986-08-11
    • Chok J. Chia
    • Chok J. Chia
    • H01L23/498H05K7/06
    • H01L23/49827H01L2224/48091Y10T29/49146
    • A pin-grid package is created by starting with printed wiring boards that have plated through holes that can accommodate wire pins. Pins are secured in position to extend outward from one face of the PW board in the form of a pin grid array of the desired configuration which is typically a plurality of concentric rings thereby creating a square grid pattern of predetermined spacing. The opposing PW board face includes a central pin-free area to which is secured a semiconductor die. This face of the PW board includes a plurality of wiring traces that connect each pin to an array that surrounds the semiconductor die. The traces are connected to the bonding pads of the semiconductor die by either wire bonds or a spider assembly using tape assembly bonding. The PW board is located in a mold that has a flat faced first platen that contains cut-out regions that will accommodate the package pins. The other flat-faced mold platen contains molding cavities that are in registry with and slightly larger than the PW boards. The mold cavities include a series of ribs that are distributed around the cavity periphery. These ribs bear against the PW board when the mold is assembled so that the PW board is centered and pressed against the flat face of first platen in the region outboard of the pin-grid pattern. When a liquified plastic encapsulant is forced into the mold the cavities will be filled and the liquid will be excluded from the pin side of the PW board.
    • 通过从具有电镀通孔的印刷电路板开始,可以容纳线引脚,从而创建一个针格栅封装。 引脚被固定就位,从PW板的一个面向外延伸,形式为通常是多个同心环的所需结构的销栅格阵列形式,从而产生预定间隔的正方形网格图案。 相对的PW板面包括固定半导体管芯的中心无引脚区域。 PW板的该面包括将每个引脚连接到围绕半导体管芯的阵列的多个布线迹线。 迹线通过线接合或者使用带组件接合的蜘蛛组件连接到半导体管芯的接合焊盘。 PW板位于模具中,该模具具有平坦的第一压板,其包含将容纳封装销的切口区域。 另一个平面模具压板包含与PW板对准并略大的模制腔。 模腔包括分布在腔周边周围的一系列肋。 当模具组装时,这些肋承载在PW板上,使得PW板在针脚格栅图案外侧的区域中心并压靠在第一压板的平面上。 当液态塑料密封剂被迫进入模具时,空腔将被填充,并且液体将从PW板的销侧排除。