Three dimensional interconnect using Au and pillar bumps

Wu, Fei-Jain; Ho, Lung-Hua; Kuo, Chih‐Ming; Tu, Chia-Jung; Hsieh, Chin-Tang; Ni, Chih-Hsien; Chang, Shih-Chieh; Wu, Chuan-Yu; Huang, Haoping; Lin, Kung-An; Hsu, Yi-Chu

doi:10.1109/ectc.2013.6575842

Cited by 3 publications

(1 citation statement)

References 17 publications

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“…In the industrial test criteria, most standard life test is carried out at 125°C. Many studies have been made to research the change of solder joint during aging test under different experimental conditions, such as 150°C/1000 h (Wu et al, 2013;Rong et al, 2019), 150°C/500 h (Lee et al, 2013;Zhang et al, 2019b) and 180°C/300 h (Lim et al, 2009). In this study, the samples in Figure 1 Process flow and optical image of the sample four groups were aged at 200°C for 0 h, 100 h, 200 h and 300 h according to cost consideration and industry standard (Wu et al, 2013;Rong et al, 2019;Qi et al, 2008).…”

Section: Experiments Processmentioning

confidence: 99%

Experimental study on the fracture behavior variation of the Au stud bump bonding with different high temperature storage times

Zhang

Wang

Sun

et al. 2023

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Purpose Au stud bump bonding technology is an effective means to realize heterogeneous integration of commercial chips in the 2.5D electronic packaging. The purpose of this paper is to study the long-term reliability of the Au stud bump treated by four different high temperature storage times (200°C for 0, 100, 200 and 300 h). Design/methodology/approach The bonding strength and the fracture behavior are investigated by chip shear test. The experiment is further studied by microstructural characterization approaches such as scanning electron microscope, energy dispersive spectrometer and so on. Findings It is recognized that there were mainly three typical fracture models during the chip shear test among all the Au stud bump samples treated by high temperature storage. For solder bump before aging, the fracture occurred at the interface between the Cu pad and the Au stud bump. As the aging time increased, the fracture mainly occurred inside the Au stud bump at 200°C for 100 and 200 h. When aging time increased to 300 h, it is found that the fracture transferred to the interface between the Au stud bump and the Al Pad. Originality/value In addition, the bonding strength also changed with the high temperature storage time increasing. The bonding strength does not change linearly with the high temperature storage time increasing but decreases first and then increases. The investigation shows that the formation of the intermetallic compounds because of the reaction between the Au and Al atoms plays a key role on the bonding strength and fracture behavior variation.

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