| 摘要 |
PURPOSE:To form the bump of short tact and less dispersion in shape by a method wherein the bump is formed in one action while a ball is made during the bump formation step. CONSTITUTION:A ball 7 is made on the front end of a wire 3 using an electric torch 17, next, the ball 7 is disconnected from the wire 3 simultaneously with the inverse action of a bonding tool 8 to pick up the ball 7. Next, the bonding tool 8 is reset to the regular position to form a bump on the position 2 to be bonded while the wire 3 is fed to make a new ball again. Through these procedures, the bumps are continuously formed by repeating these steps. |
