| 摘要 |
PURPOSE:To improve products yield by making a bonding tool ascend vertically up to a specified height, standing a part corresponding to the neck part of a loop straightly, moving the tool in the direction inverse to the direction forming the loop by a specified amount, and making the tool further ascend by a specified amount. CONSTITUTION:A bonding tool 14 is made to ascend vertically up to a point (a), and a part corresponding to the neck part N of a loop L is made to stand straightly. After the tool is made to further ascend up to a point (b), the tool is made to move as far as a point (c) in the direction inverse to the direction forming the loop L. After the tool is made to ascend from the point (c) up to a point (d), the tool is made to move in the direction forming the loop. Further the tool is made to descend; simultaneously or a little later, an upper clamp 9 is clamped for a short period, and back tension is applied to a wire 3; in this state, the wire 3 is bonded to a lead frame 19. By the effect of the back tension, an ideal loop shape wherein the loop L of the wire 3 is high and free from under-loop can be obtained. |
