公开(公告)号：US4594493A

公开(公告)日：1986-06-10

申请号：US517190

申请日：1983-07-25

申请人： Shane Harrah ,  William Phy

发明人： Shane Harrah ,  William Phy

IPC分类号： H01L21/60 ,  B23K20/00 ,  H01L21/607 ,  B23K31/00

CPC分类号： H01L24/85 ,  B23K20/007 ,  H01L24/48 ,  H01L24/78 ,  H01L2224/45015 ,  H01L2224/45124 ,  H01L2224/45144 ,  H01L2224/48091 ,  H01L2224/48247 ,  H01L2224/48451 ,  H01L2224/48465 ,  H01L2224/48599 ,  H01L2224/48699 ,  H01L2224/49171 ,  H01L2224/78268 ,  H01L2224/78301 ,  H01L2224/85045 ,  H01L2224/85065 ,  H01L2224/85075 ,  H01L2224/85181 ,  H01L2224/85205 ,  H01L24/45 ,  H01L2924/01006 ,  H01L2924/01013 ,  H01L2924/01014 ,  H01L2924/01015 ,  H01L2924/01018 ,  H01L2924/01033 ,  H01L2924/01079 ,  H01L2924/01082 ,  H01L2924/01327 ,  H01L2924/10253 ,  H01L2924/14 ,  H01L2924/15724 ,  H01L2924/19041 ,  H01L2924/19043 ,  H01L2924/20753 ,  H01L2924/30105 ,  H01L2924/3025

摘要： The present invention relates to a method and apparatus for forming a ball bond between a fine wire such as aluminum wire and a surface with the ball bond being approximately radially symmetric about a principal axis of a portion of the wire. The apparatus may include a plurality of electrodes radially spaced about the wire to define gaps between each electrode and the tip of the wire and a plurality of resistance elements. A voltage source may be connected to form a circuit consisting of plural electrically parallel legs, each of which includes the series combination of a resistance element, an electrode and an arc path between the electrode and the tip of the wire. A molten ball is formed at the end of the wire when arcs are essentially simultaneously produced between the electrodes and the tip of the wire. In a preferred embodiment, the resistances of the resistance elements are approximately equal. In addition, the plurality of electrodes are preferably symmetrically spaced about the wire to define gaps of nearly equal length between each electrode and the tip of the wire.

摘要翻译： 本发明涉及一种用于在诸如铝线的细线之间形成球接合的方法和装置，并且所述球接头的表面围绕导线的一部分的主轴大致径向对称。 该设备可以包括围绕电线径向间隔开的多个电极，以限定每个电极和电线的尖端之间的间隙以及多个电阻元件。 电压源可以被连接以形成由多个电平行腿组成的电路，每个电极包括电极元件，电极和电极与线尖之间的电弧路径的串联组合。 当在电极和电极的尖端之间基本上同时产生电弧时，在电线的末端形成熔融的球。 在优选实施例中，电阻元件的电阻大致相等。 此外，多个电极优选地围绕电线对称地间隔开，以限定每个电极和电线末端之间几乎相等长度的间隙。