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    • 4. 发明授权
    • Surface metal balancing to reduce chip carrier flexing
    • 表面金属平衡,减少芯片载体弯曲
    • US06497943B1
    • 2002-12-24
    • US09503395
    • 2000-02-14
    • Lisa J. JimarezMiguel A. JimarezMark V. Pierson
    • Lisa J. JimarezMiguel A. JimarezMark V. Pierson
    • B32B300
    • B32B15/08B32B15/20B32B17/10229B32B2250/40B32B2425/00H01L23/142H01L23/49822H01L2224/16225H01L2924/00014H01L2924/01322H05K1/0271H05K3/4602H05K2201/0949H05K2201/09781H05K2201/10674H05K2201/10734Y10T428/24917H01L2924/00H01L2224/0401
    • A surface metal balancing structure for a chip carrier, and an associated method of fabrication, to reduce or eliminate thermally induced chip carrier flexing. A substrate, such as a chip carrier made of organic dielectric material, is formed and includes: internal circuitization layers, a plated through hole, and outer layers comprised of an allylated polyphenylene ether. A stiffener ring for mechanically stabilizing the substrate is bonded to an outer portion, such as an outer perimeter portion, of the top surface of the substrate, in light of the soft and conformal organic material of the substrate. The top and bottom surfaces of the substrate have metal structures, such as copper pads and copper circuitization, wherein a surface area (A) multiplied by a coefficient of thermal expansion (C) is greater for the metal structure at the bottom surface than for the metal structure at the top surface. A metal pattern is adjacent to the top surface so as to make the product AC of metal structures at or near the top and bottom surfaces approximately equal. The metal pattern reduces or eliminates flexing of the substrate in an elevated temperature environment, such as during a reflow of solder that couples a semiconductor chip to the substrate.
    • 用于芯片载体的表面金属平衡结构以及相关的制造方法,以减少或消除热诱导的芯片载体弯曲。 形成诸如由有机电介质材料制成的芯片载体的衬底,其包括:内部电路层,电镀通孔和由烯丙基化聚苯醚构成的外层。 根据衬底的软和保形有机材料,用于机械稳定衬底的加强环被结合到衬底的顶表面的外部部分,例如外周部分。 衬底的顶表面和底表面具有诸如铜焊盘和铜电路的金属结构,其中在底表面处的金属结构的表面积(A)乘以热膨胀系数(C)大于对于 金属结构在顶面。 金属图案与顶表面相邻,以使金属结构的产品AC在顶表面和底表面处或附近大致相等。 金属图案减少或消除了在升高的温度环境中的衬底的弯曲,例如在将半导体芯片耦合到衬底的焊料的回流期间。
    • 6. 发明授权
    • Electrical coupling of a stiffener to a chip carrier
    • 加强筋与芯片载体的电耦合
    • US06699736B2
    • 2004-03-02
    • US10305643
    • 2002-11-26
    • Terry J. DornbosRaymond A. Phillips, Jr.Mark V. PiersonWilliam J. RudikDavid L. Thomas
    • Terry J. DornbosRaymond A. Phillips, Jr.Mark V. PiersonWilliam J. RudikDavid L. Thomas
    • H01L2144
    • H05K3/0061H01L21/4846H05K3/386H05K3/4038H05K2201/0305H05K2201/09554H05K2201/10977
    • A method and structure for conductively coupling a metallic stiffener to a chip carrier. A substrate has a conductive pad on its surface and an adhesive layer is formed on the substrate surface. The metallic stiffener is placed on the adhesive layer, wherein the adhesive layer mechanically couples the stiffener to the substrate surface and electrically couples the stiffener to the pad. The adhesive layer is then cured such as by pressurization at elevated temperature. Embodiments of the present invention form the adhesive layer by forming an electrically conductive contact on the pad and setting a dry adhesive on the substrate, such that the electrically conductive contact is within a hole in the dry adhesive. The electrically conductive contact electrically couples the stiffener to the pad. The curing step includes curing both the dry adhesive and the electrically conductive contact, resulting in the dry adhesive adhesively coupling the stiffener to the substrate. The electrically conductive contact may include an electrically conductive adhesive or a metallic solder. Additional embodiments of the present invention form the adhesive layer by applying an electrically conductive adhesive on the substrate, wherein after the stiffener is placed on the adhesive layer, the electrically conductive adhesive mechanically and electrically couples the stiffener to the surface of the substrate.
    • 用于将金属加强件导电耦合到芯片载体的方法和结构。 衬底在其表面上具有导电焊盘,并且在衬底表面上形成粘合剂层。 金属加强件被放置在粘合剂层上,其中粘合剂层将加强件机械地连接到基底表面,并将加强件电耦合到垫。 然后将粘合剂层固化,例如通过在升高的温度下加压。 本发明的实施例通过在焊盘上形成导电触点并在基板上设置干燥的粘合剂来形成粘合剂层,使得导电触点位于干粘合剂中的孔内。 导电触头将加强件电耦合到焊盘。 固化步骤包括固化干燥粘合剂和导电接触,导致干燥粘合剂将加强剂粘合到基底上。 导电接触可包括导电粘合剂或金属焊料。 本发明的另外的实施方案通过在基底上施加导电粘合剂形成粘合剂层,其中在将加强件放置在粘合剂层上之后,导电粘合剂将加强件机械地和电耦合到基底的表面。
    • 8. 发明授权
    • Method of making electrically conductive contacts on substrates
    • 在基板上制作导电触点的方法
    • US06173887B1
    • 2001-01-16
    • US09339924
    • 1999-06-24
    • Donald I. MeadMark V. Pierson
    • Donald I. MeadMark V. Pierson
    • B23K2622
    • H05K3/3484B23K1/0053B23K1/0056B23K2101/40H05K3/3494H05K2203/043H05K2203/0557H05K2203/107
    • A method of making an electrically conductive contact on a substrate by applying a layer of solder paste to a circuitized feature on a substrate and selectively heating and melting the solder paste over the feature to form a solder bump. The excess solder paste is removed. A focused energy heat source such as a laser beam or focused Infrared heats the solder paste. In another embodiment, a reflective mask with apertures may be used to allow focused heating source to selectively melt areas of the solder paste layer applied to a circuitized feature. In yet another embodiment, a reflective mask with apertures filled with solder paste is applied onto a substrate and then heated to cause localized solder melting. The mask and excess solder paste are removed.
    • 一种通过将衬底层施加到衬底上的电路化特征并在该特征上选择性地加热和熔化焊膏以形成焊料凸块来在衬底上形成导电接触的方法。 去除多余的焊膏。 聚焦能量热源如激光束或聚焦红外线加热焊膏。 在另一个实施例中,具有孔的反射掩模可以用于允许聚焦的加热源选择性地熔化施加到电路化特征上的焊膏层的区域。 在另一个实施例中,将具有填充有焊膏的孔的反射掩模施加到基板上,然后加热以引起局部焊料熔化。 去除掩模和多余的焊膏。