| 摘要 |
PURPOSE:To strengthen the pressure at the cutting point of a wire by oscillating the fulcrum of an arm for driving the bonding wedge centered on the position at which the tip of the wedge becomes parallel to a substrate. CONSTITUTION:As the fulcrum D'' of an arm for driving a wedge is set on the left below the position D at which the tip of the wedge becomes parallel to a substrate, the pressure on the right below the tip 6 is large while small on the left therebelow. As the tip it flat, a wire is easy to cut at the point E on the right below the tip. After fused, the wire is cut at the point E when it is clamped and pulled. This ensures a certain bonding strength while makes the wire easy to cut on the intensely pressed side. |
