Rapid on-site nondestructive surface corrosion characterization of sintered nanocopper paste in power electronics packaging using hyperspectral imaging

被引：0

作者：

Chen, Wei ^{[1
]}

Feng, Shuo ^{[1
]}

Liu, Xu ^{[1
,2
]}

Hu, Dong ^{[2
]}

Zhu, Xi ^{[3
]}

Yao, Qi ^{[1
]}

Fan, Xuejun ^{[4
]}

Zhang, Guoqi ^{[2
]}

Fan, Jiajie ^{[1
,2
,3
]}

机构：

[1] Fudan Univ, Inst Future Lighting, Acad Engn & Technol, Shanghai Engn Technol Res Ctr Power Device S, Shanghai 200433, Peoples R China

[2] Delft Univ Technol, EEMCS Fac, NL-2628 Delft, Netherlands

[3] Fudan Univ Ningbo, Res Inst, Ningbo 315336, Peoples R China

[4] Lamar Univ, Dept Mech Engn, POB 10028, Beaumont, TX 77710 USA

来源：

MICROELECTRONICS RELIABILITY | 2024年 / 162卷

基金：

中国国家自然科学基金;

关键词：

Power electronics packaging; Sintered nanocopper; H2S corrosion; Hyperspectral imaging; Tarnishing products;

D O I：

10.1016/j.microrel.2024.115508

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Sintered nanocopper (nanoCu) paste, exhibiting excellent electrical, thermal, and mechanical performances, offers promise for interconnections in wide bandgap (WBG) semiconductors operating at higher temperatures. However, sintered nanoCu is prone to severe corrosion in environments containing H2S, with on-site characterization methods for the composition of corrosion products currently lacking. In this study, a novel method was proposed for the rapid characterization of corrosion products during the corrosion process based on hyperspectral imaging (HSI) technology. Sintered nanoCu samples were subjected to 336 h H2S gas corrosion tests with bulk Cu as the reference, followed by correlating the corrosion element content with hyperspectral characteristic parameters. Then, the morphology and composition of corrosion products were researched using focused ion beam scanning electron microscope (FIB-SEM) and transmission electron microscope (TEM) analysis. The results showed that (1) during the corrosion process, a linear relationship was established between the Cu, O elemental atomic contents on the sample surfaces and their hyperspectral characteristic parameters. (2) The elemental atomic content of S exhibited an exponential relationship with the characteristic parameter. (3) The change rate in the spectral characteristic parameters during the corrosion process reflected the severity of corrosion, which was confirmed by comparing the thickness of the corrosion products of the sintered nanoCu and bulk Cu. This study offers a foundation for the further investigation of rapid on-site characterization of sintered nanoCu corrosion involving H2S.

引用

页数：8