ISSN: 1003-6326
CN: 43-1239/TG
CODEN: TNMCEW

Vol. 16    No. 3    June 2006

[PDF]    
Temperature effect in thermosonic wire bonding
WU Yun-xin(吴运新), LONG Zhi-li(隆志力), HAN Lei(韩 雷), ZHONG Jue(钟 掘)
(School of Electromechanical Engineering, Central South University, Changsha 410083, China)
Abstract:  The temperature effect on bonding strength and ultrasonic transmission in a PZT transducer system was investigated. The results show that, the temperature change influences the material features of the bonding interface, such as elastic modulus, tensile strength of gold ball and Ag substrate, which results in different bonding strengths. Moreover, the temperature change also influences the impedance and dissipative ultrasonic energy in the PZT system. The current signal of PZT transducer was analyzed by join time-frequency analysis, which can reveal the current change in a bonding process more clearly and completely. The analysis shows that the bonding parameters influence mutually. These results can help build some criteria for parameter match and optimization in wire bonding processes.
Key words: thermosonic wire bonding; filp chip bonding; bonding temperature; bonding strength; ultrasonic energy
Superintended by The China Association for Science and Technology (CAST)
Sponsored by The Nonferrous Metals Society of China (NFSOC)
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