Study on the effects of surface hydroxyl of silica fillers on the mechanical properties of underfills

Zhang, Zhenguo1,2; Yu, Xuecheng2; Zhang, Leicong2; Fan, Yixuan1,2; Zhao, Danning2,3; Sun, Rong2; Li, Gang2; Zhu, Pengli2

10.1109/ICEPT59018.2023.10492239

2023

24th International Conference on Electronic Packaging Technology (ICEPT)

2836-9734

2023 24TH INTERNATIONAL CONFERENCE ON ELECTRONIC PACKAGING TECHNOLOGY, ICEPT

AUG 08-11, 2023

null,Shihezi,PEOPLES R CHINA

345 E 47TH ST, NEW YORK, NY 10017 USA

IEEE

As the flip-chip bump becomes smaller, the filler in underfill becomes nano-sized silica particles. However, there are few studies on the influence of the surface chemical state of silica on the mechanical properties of underfills. To explore this point, we prepared calcined and uncalcined SiO2 nanoparticles, respectively, and then used them to fabricate two types of epoxy-based composites. And we compared the mechanical and thermal properties of two different composite materials. We found that the -OH-free SiO2 filled composite materials have better properties. The SEM image of the crosssection shows that the compatibility of -OH-free SiO2 with epoxy resin matrix is better. Therefore, the surface hydroxyl groups of SiO2 have a deteriorated effect on the reliability of the underfills. Finally, the reasons were explored through section analysis and thermodynamic analysis.

underfill surface chemistry thermal-mechanical properties fracture toughness reliability

其他

英语

CPCI-S

Shenzhen RD project[JSGGZD20220822100001002] ; Key-Area Research and Development Program of Guangdong Province[2023B0101030002]

Engineering ; Materials Science

Engineering, Manufacturing ; Engineering, Electrical & Electronic ; Materials Science, Multidisciplinary

WOS:001221819200290

Web of Science

1.Univ Sci & Technol, Nano Sci & Technol Inst, Suzhou, Peoples R China
2.Chinese Acad Sci, Shenzhen Inst Adv Technol, Shenzhen Inst Adv Elect Mat, Shenzhen, Peoples R China
3.South Univ Sci & Technol China, Shenzhen, Peoples R China

Zhang, Zhenguo,Yu, Xuecheng,Zhang, Leicong,et al. Study on the effects of surface hydroxyl of silica fillers on the mechanical properties of underfills[C]. 345 E 47TH ST, NEW YORK, NY 10017 USA:IEEE,2023.