SURFACE MOUNT ELECTRIC PART
    36.
    发明公开
    SURFACE MOUNT ELECTRIC PART 审中-公开
    ELEKTRISCHES TEIL MITOBERFLÄCHENANBRINGUNG

    公开(公告)号:EP1850644A1

    公开(公告)日:2007-10-31

    申请号:EP06702531.2

    申请日:2006-01-06

    Abstract: A surface mounted electric part not requiring any additional facility investment on soldering and free from coming off a substrate even when the substrate is turned over and subjected to reflow. In a state that an electrical part is placed under a circuit board (100), the sum B of the periphery length of a second soldering portion (P2) is so set that the relationship between a downward rotation moment (M1) around a first soldering portion (P1) produced by the gravity and an upward rotation movement (M2) acting on a second soldering portion (P2) produced by the surface tension of solder melted during soldering using the overall heating method is M1 ≤ M2, and the sum A of the periphery length of the first soldering portion (P1) is so set that the relationship between a downward rotation movement (M3) around the second soldering portion (P2) produced by the gravity and an upward rotation movement (M4) acting on the first soldering portion (P1) produced by the surface tension is M3 ≤ M4.

    Abstract translation: 一种表面安装的电气部件,即使当基板翻转并经受回流时,也不需要额外的焊接投资并且不会脱离基板。 在将电气部件配置在电路基板(100)的状态下,第二焊接部(P2)的周长的总和B被设定为使得第一焊接周围的向下旋转力矩(M1) 通过重力产生的部分(P1)和通过使用整体加热方法在焊接期间熔化的焊料的表面张力产生的作用在第二焊接部分(P2)上的向上旋转运动(M2)为M1‰M2,并且总和A为 第一焊接部(P1)的周边长度被设定为使得由重力产生的第二焊接部(P2)周围的向下旋转运动(M3)与作用在第一焊接上的向上旋转运动(M4)之间的关系 由表面张力产生的部分(P1)为M3‰M4。

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