Electric heating – Heating devices – Combined with diverse-type art device
Patent
1997-06-10
1999-09-14
Hoang, Tu Ba
Electric heating
Heating devices
Combined with diverse-type art device
219 5622, 219480, 22818022, 361764, 361768, H05B 302, B23K 1116, H05K 118
Patent
active
059518936
ABSTRACT:
Heater circuits (13) are placed in close proximity or integrated with connection points (12) of an integrated circuit. A connection point is an area where a wire bond or conductive bump is coupled for providing electrical interconnection external to an integrated circuit. Heater circuits (13) are polysilicon strips that form resistive heat elements. A DC voltage or a pulsed voltage is applied to the heater circuits (13) to generate a local heat at the connection points that can reach temperatures exceed 1000 degrees centigrade. The heat is localized to an area near the connection point to prevent damage to temperature sensitive material. The heater circuits (13) raise the temperature of the connection points (12) to increase bond strength of a wire bond or to reflow a conductive bump to adhere to a connection point of another substrate.
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Bitko Gordon
O'Brien Gary
Coleman Sharon K.
Hoang Tu Ba
Hoshizaki Gary W.
Motorola Inc.
Parker Lanny L.
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