Metal fusion bonding – Process – Plural joints
Reexamination Certificate
2005-06-07
2005-06-07
Edmondson, Lynne R. (Department: 1725)
Metal fusion bonding
Process
Plural joints
C228S001100, C228S004500, C228S180210, C228S180220
Reexamination Certificate
active
06902101
ABSTRACT:
In a bump bonding technique for forming a bump on an IC, including forming a ball at the tip of a gold wire protruding from a capillary, and providing a metal-to-metal joint by applying ultrasonic vibration from a ultrasonic head through the capillary while pressing the ball against a pad portion on the IC, the metal-to-metal joint is provided by applying the ultrasonic vibration at a frequency in a range of 130 to 320 kHz, more preferably in a range of 170 to 270 kHz, and most preferably at a frequency of 230±10 kHz at room temperatures and atmospheric pressure. Consequently, a bump is formed on an IC having a low heat resistance temperature in a satisfactory joint condition, and a bump is formed with good positional accuracy without giving the influence of heat to the surroundings.
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English Language Abstract of JP 10-261645.
Horie Satoshi
Kiyomura Hiroyuki
Sasaoka Tatsuo
Tokunaga Tetsuya
Yonezawa Takahiro
Edmondson Lynne R.
Greenblum & Bernstein P.L.C.
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