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Thermal compression bonding with non-conductive adhesive of 30μm pitch Cu pillar micro bumps on organic substrate with bare Cu bondpads

机译:用裸露的铜焊盘在有机衬底上用间距为30μm的铜柱微凸点的非导电粘合剂进行热压粘合

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The assembly capability of 30μm ultra-fine pitch Cu pillar flip chip interconnect on a two-layer FCCSP organic substrate with a chip size of 8mm × 8mm × 0.1mm chip was demonstrated by using thermal compression bonding with non-conductive paste (TCB-NCP) to mitigate the issue of coefficient of thermal expansion (CTE) mismatch between silicon chip and organic substrate. A method, developed to quantify post-bonding misalignment, was used to study the effects of different bonding approaches. This paper reports on details of the bill of materials (BoM); description of method to determine mis-alignment; the effects of different bonding approach; assembly challenges; and reliability assessment involving the solder cap volume effects on flip chip joint fatigue life under temperature cycling tests.
机译:通过与非导电胶(TCB-NCP)进行热压结合,展示了在芯片尺寸为8mm×8mm×0.1mm的两层FCCSP有机基板上30μm超细间距Cu柱倒装芯片互连的组装能力。 ),以减轻硅芯片和有机基板之间的热膨胀系数(CTE)不匹配的问题。开发了一种用于量化键合后未对准的方法,用于研究不同键合方法的效果。本文报告了物料清单(BoM)的详细信息;描述确定失准的方法;不同键合方式的影响;装配挑战;可靠性评估,包括在温度循环测试下,焊锡帽体积对倒装芯片接头疲劳寿命的影响。

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