SOLDER BAR FOR HIGH POWER FLIP CHIPS
    6.
    发明申请
    SOLDER BAR FOR HIGH POWER FLIP CHIPS 审中-公开
    用于高功率转盘的焊条

    公开(公告)号:WO01091183A1

    公开(公告)日:2001-11-29

    申请号:PCT/US2001/015928

    申请日:2001-05-17

    摘要: A solder bar compatible with conventional flip chip technology fabrication methods for high power/high current applications includes first and second generally circular solder pads of diameter D formed on a substrate and connected by a solder bar pad of width BW (Fig. 4). The centers of the generally circular solder pads are spaced apart by distance bar length BL. A mass of solder having volume VB and over the solder bar pads to form a dog-bone shaped solder bar (Fig. 5-8). The solder bar reaches height H1 above the centers of the first and second generally circular pads and reaching height H2 above the mid point of the solder bar pad. The values for the diameter D, bar length BL, bar width BW and solder volume VB are selected in a manner that H1 and H2 are approximately equal. Conventional circular (as viewed from above) solder bumps can be formed upon the same substrate; in this case heights H1 and H2 are made approximately equal to the height of the conventional solder bumps.

    摘要翻译: 与用于高功率/高电流应用的常规倒装芯片技术制造方法兼容的焊料条包括直径为D的第一和第二通常为圆形的焊盘,其形成在衬底上并且通过宽度为BW的焊料焊盘(图4)连接。 大致圆形焊盘的中心间隔距离棒长度BL。 大量焊料,其体积为VB并且焊锡条焊盘上方形成一个狗骨形焊条(图5-8)。 焊料棒在第一和第二大体圆形焊盘的中心之上达到高度H1,并在焊料条焊盘的中点之上达到高度H2。 以H1和H2近似相等的方式选择直径D,条长度BL,条宽BW和焊料体积VB的值。 常规的圆形(如上所述)可以在相同的基板上形成焊料凸块; 在这种情况下,高度H1和H2大致等于常规焊料凸块的高度。