Stacked via-stud with improved reliability in copper metallurgy
    2.
    发明授权
    Stacked via-stud with improved reliability in copper metallurgy 失效
    堆叠通孔,提高了铜冶金的可靠性

    公开(公告)号:US06972209B2

    公开(公告)日:2005-12-06

    申请号:US10306534

    申请日:2002-11-27

    摘要: A multilevel semiconductor integrated circuit (IC) structure including a first interconnect level including a layer of dielectric material over a semiconductor substrate, the layer of dielectric material comprising a dense material for passivating semiconductor devices and local interconnects underneath; multiple interconnect layers of dielectric material formed above the layer of dense dielectric material, each layer of dielectric material including at least a layer of low-k dielectric material; and, a set of stacked via-studs in the low-k dielectric material layers, each of said set of stacked via studs interconnecting one or more patterned conductive structures, a conductive structure including a cantilever formed in the low-k dielectric material. The dielectric layer of each of the multiple interconnection levels includes a soft low-k dielectric material, wherein the cantilever and set of stacked via-studs are integrated within the soft low-k dielectric material to increase resistance to thermal fatigue crack formation. In one embodiment, each of the set of stacked via-studs in the low-k dielectric material layers is provided with a cantilever, such that the cantilevers are interwoven by connecting a cantilever on one level to a bulk portion of the conductor line on adjacent levels of interconnection, thereby increasing flexibility of stacked via-studs between interconnection levels.

    摘要翻译: 一种多级半导体集成电路(IC)结构,包括在半导体衬底上包括电介质材料层的第一互连电平,所述介电材料层包括用于钝化半导体器件的致密材料和其下的局部互连; 形成在致密电介质材料层之上的电介质材料的多个互连层,每层介电材料包括至少一层低k电介质材料; 以及在低k电介质材料层中的一组堆叠的通孔螺钉,每组所述一组堆叠通孔柱互连一个或多个图案化导电结构,包括形成在低k电介质材料中的悬臂的导电结构。 多个互连级别中的每一个的电介质层包括软的低k电介质材料,其中悬臂和一组堆叠的通孔螺钉集成在软低k电介质材料内,以增加对热疲劳裂纹形成的抵抗力。 在一个实施例中,低k电介质材料层中的每组叠置通孔螺柱设置有悬臂,使得悬臂通过将一个级上的悬臂连接到相邻的导体线的主体部分而交织 互连级别,从而增加互连级别之间堆叠通孔的灵活性。

    Use of tapered head pin design to improve the stress distribution in the
braze joint
    7.
    发明授权
    Use of tapered head pin design to improve the stress distribution in the braze joint 失效
    采用锥形头针设计,提高钎焊接头的应力分布

    公开(公告)号:US4970570A

    公开(公告)日:1990-11-13

    申请号:US423613

    申请日:1989-10-16

    IPC分类号: H01L21/48 H01L23/498 H05K3/34

    摘要: The present invention teaches a structure for reducing the stresses created on a substrate and on the bonding surface at which a connector is attached. The connector has a tapered or beveled head thereby tapering the stress away from the edges of the bonding surface and therefore away from the high stress areas of the substrate, preventing cracking and delamination problems that might otherwise result. The tapered-head geometry also allows greater flexibility in manufacturing the connectors particularly when fabricating pins using a cold-heading process in that a quarter shank diameter:pin head diameter ratio can be obtained.

    摘要翻译: 本发明教导了一种用于减少在基板上以及在连接器所在的接合表面上产生的应力的结构。 连接器具有锥形或倾斜的头部,从而使应力使结合表面的边缘远离并且因此远离基板的高应力区域,从而防止否则可能导致的开裂和分层问题。 锥形头几何形状还允许制造连接器时的更大的灵活性,特别是当使用冷镦工艺制造销时,因为可以获得四分之一直径:销头直径比。