Contactless bonding tool heater

Details Contactless bonding tool heater Contactless bonding tool heater

1999-03-30

1999-10-26

Ryan, Patrick

Metal fusion bonding

Process

With condition responsive, program, or timing control

22818022, 2282341, B23K 3704, B23K 37047

Patent

active

059712503

ABSTRACT:
In a pick and place machine of the type having an X-Y movable bond head there is provided a vertically movable pick up tool in the bond head having a tip for picking up and placing a device. The tip of the bonding tool is mounted opposite a radiant heating element which is juxtaposed and separated from the tip of the bonding tool. The tip of the bonding tool is heated to a predetermined control temperature with the radiant energy heating element and during a bonding operation it incurs some cooling. The amount of cooling is calculated by the time and the length of the extension of the bonding tool from its heating element and a computer controller calculates a compensation factor over a predetermined fixed time which includes retracting the bonding tool tip a predetermined vertical distance into the heater to reheat the tool and compensate for the amount of cooling that occurred during the pick and place operation.

REFERENCES:
patent: 4552300 (1985-11-01), Zovko et al.
patent: 5065933 (1991-11-01), Basavanhally
patent: 5598965 (1997-02-01), Scheu
patent: 5667129 (1997-09-01), Morita et al.

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