| 摘要 |
PROBLEM TO BE SOLVED: To always make const. the shape and size of a ball formed at the top of an Au wire by straightening this wire bent at bonding to a second bond point and keeping a const. distance between the top of the wire and spark electrode in the next step. SOLUTION: After bonding to a second bond point B2 , an Au wire 2 is fed by a fixed length from the top end of a capillary 1, such that after bonding, the capillary 1 is moved back by a specified length from the bond point B2 to a first bond point in the reverse direction (arrow 1) to that at wiring, while the moved up by specified length (arrow 2). When the capillary 1 is moved up by the specified length, the wire 2 is held by clamps 3 and pulled up to cut off the wire 2 connected to the point B2 . |
