3-dimensional substrate for embodying multi-packages and method of fabricating the same
    35.
    发明授权
    3-dimensional substrate for embodying multi-packages and method of fabricating the same 有权
    用于体现多包装的三维基板及其制造方法

    公开(公告)号:US07880093B2

    公开(公告)日:2011-02-01

    申请号:US11693107

    申请日:2007-03-29

    Applicant: Woong Sun Lee

    Inventor: Woong Sun Lee

    Abstract: A substrate for embodying multi-package comprises an underlying layer has a polymer material containing a conductive filler and provided with a step-like groove divided into step part and bottom part; a coating layer formed over the underlying layer, the coating layer is formed so that it may define a metal-wire forming area on the step part and the bottom part of the step-like groove and the conductive filler in the metal-wire forming area is exposed; and a metal wire formed via a plating process using the exposed conductive filler in the metal-wire forming area defined by the coating layer as a seed layer.

    Abstract translation: 用于实施多封装的基板包括下层,其具有包含导电填料的聚合物材料,并且设置有分为台阶部分和底部的阶梯状凹槽; 形成在下层之上的涂层,形成涂层,使得其可以在台阶部分上形成金属线形成区域,并且在金属线形成区域中的阶梯状沟槽和导电填料的底部 被暴露 以及金属线,其通过使用在由涂层限定的金属线形成区域中的暴露的导电填料作为种子层的电镀工艺形成。

    METHOD AND PROCESS FOR REDUCING UNDERCOOLING IN A LEAD-FREE TIN-RICH SOLDER ALLOY
    36.
    发明申请
    METHOD AND PROCESS FOR REDUCING UNDERCOOLING IN A LEAD-FREE TIN-RICH SOLDER ALLOY 有权
    无铅无铅焊料合金的减少方法和工艺

    公开(公告)号:US20100155456A1

    公开(公告)日:2010-06-24

    申请号:US12536122

    申请日:2009-08-05

    Abstract: Briefly, a novel material process is disclosed wherein one or more nucleation modifiers are added, in trace amounts, to a lead-free tin-rich solder alloy to produce a solder composition with reduce or suppressed undercooling temperature characteristics. The modifier being a substance which facilitates the reduction of extreme anisotropic properties associated with body-centered-tetragonal tin based lead-free solder. The addition of the nucleation modifiers to the solder alloy does not materially effect the solder composition's melting point. As such, balls of solder with the nucleated composition freeze while other solder balls within the array remain in the melt. This effectively enables one substrate to be pinned to another substrate by one or more predetermined solder balls to secure the package while the remaining solder joints are in the liquid state. Further, the addition of a trace amount of nucleation sites within the composition facilitates control over the number, size, and orientations of primary intermetallic compounds in tin rich crystallite grains. Moreover, trace amounts of one or more solid and/or insoluble nucleating modifiers within a given volume of solder reduces the size of average crystallites within the composition.

    Abstract translation: 简而言之,公开了一种新颖的材料方法,其中将一种或多种成核改性剂以微量添加到无铅富锡焊料合金中以产生具有降低或抑制的过冷温度特性的焊料组合物。 该改性剂是有助于减少与体心四方锡锡基无铅焊料相关的极端各向异性的物质。 将成核改性剂添加到焊料合金中不会实质上影响焊料组合物的熔点。 因此,具有成核组合物的焊料球冻结,而阵列内的其它焊球保持在熔体中。 这有效地使一个基板通过一个或多个预定的焊球被固定到另一个基板,以固定封装,而剩余的焊点处于液态。 此外,在组合物中添加微量的成核位点有助于控制富锡微晶颗粒中初级金属间化合物的数量,尺寸和取向。 此外,在给定体积的焊料中痕量的一种或多种固态和/或不溶性成核改性剂减少了组合物内平均微晶的尺寸。

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