| 摘要 |
PURPOSE:To permit the connection of a wire without applying damage to a bonded member side and without decreasing wire strength by a method wherein the load of a bonding tool is increased at the initial stage and then, the load is decreased to the optimum value. CONSTITUTION:Load transfer is performed by stopping current application to a solenoid coil 5. Now, with a current applied to the solenoid coil 5, a plunger 8 moves left to engage an arm 9 with a stopper 10. The present load of a bonding tool 3 is decided by the plunger attraction force of the solenoid coil 5. The initial high load shortens attenuation time for wire vibration and when current application is stopped at an attenuation point, the plunger 8 is released and the load of the bonding tool 3 depends on a balance coil spring 6 only to provide the wire with the optimum load. |
