12-06-2014 дата публикации
Номер: WO2014088966A3
Принадлежит:
A microelectronic assembly (10, 110, 210, 310, 410) includes a first substrate (12, 112, 212, 312, 412, 512, 612, 712, 812, 912) having a first conductive element (26, 126, 226, 326, 426, 526, 626, 726, 826, 926, 1022) and a second substrate (14, 114, 214, 314, 414) having a second conductive element (26, 126, 226, 326, 426). The assembly further includes an electrically conductive alloy mass (16, 116) joined to the first and second conductive elements (26, 126, 226, 326, 426, 526, 626, 726, 826, 926, 1022), including a first, a second and a third material. First and second materials of the alloy mass (16, 116) each have a melting point lower than a melting point of the alloy. A concentration of the first material varies in concentration from a relatively higher amount at a location disposed toward the first conductive element (26, 126, 226, 326, 426, 526, 626, 726, 826, 926, 1022) to a relatively lower amount toward the second conductive element (26, 126, 226, 326, 426), and a concentration ...
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