Flame-off limited circuit for wire bonding ball forming apparatu

Details Flame-off limited circuit for wire bonding ball forming apparatu Flame-off limited circuit for wire bonding ball forming apparatu

1986-11-24

1987-08-18

Shaw, Clifford C.

Electric heating

Metal heating

Wire, rod, or bar bonding

219 5622, B23K 1122

Patent

active

046878971

ABSTRACT:
It has been ascertained that there is a momentary drop in the flame-off arc voltage used to produce a ball in a ball bonder when the ball contacts the tool tip. A part of the present invention comprises a circuit for detecting this voltage drop and terminating the arc voltage immediately after such contact is made.

REFERENCES:
patent: 4390771 (1983-06-01), Kurtz et al.

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