Device for detecting height of bonding surface

Details Device for detecting height of bonding surface Device for detecting height of bonding surface

1989-10-16

1991-09-10

Heinrich, Samuel M.

Metal fusion bonding

With control means responsive to sensed condition

Work-responsive

228102, 228 45, H01L 2160

Patent

active

050466550

ABSTRACT:
A bonding height detecting device used in a wire bonding machine which includes a rotatable axle provided on a bonding head, a moving block pivotally mounted on the rotatable axle, a bonding arm fixed on the rotatable axle, and a bonding tool attached to one end of the bonding arm through which a bonding wire is passed. The detecting device includes a lever fixed on the rotatable axle and having a first stopper and a detecting surface, a second stopper fixed on the moving block so that the second stopper is urged to contact the first stopper, a sensor fixture attached to the second stopper, and a proximate sensor mounted on the sensor mixture and facing the detecting surface of the lever.

REFERENCES:
patent: 4109846 (1978-08-01), Pennings et al.
patent: 4598853 (1986-07-01), Hill
patent: 4653681 (1987-03-01), Dreibelbis et al.
patent: 4718591 (1988-01-01), Hill

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