Improving the performance of silver coating deposited on copper through corrosion inhibitors

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2024-11-26 DOI:10.1016/j.matlet.2024.137782

Qiuping Zhao , Rupeng Li , Guanqun Hu , Changning Bai , Xingkai Zhang

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Abstract

Immersion silver plating is an important surface finishing technique in the integrate circuit industry. However, it often results in silver coatings with poor compactness and adhesion due to the significant difference in potentials between silver and copper. The corrosion inhibitors of copper, rather than complexing agents of silver ions, were used to improve the immersion plated silver coating performance on copper. It was found the combined use of benzotriazole and imidazole could regulate the erosion rate of the copper substrate and improve the quality of the silver coating. The effects of different inhibitors concentrations on surface morphology, elemental composition, corrosion resistance, hardness, and conductivity of the silver coating were studied. The results indicated the optimal concentration of the combined inhibitors was 0.058 mol∙L^-1, which enhanced the compactness, crystallinity, and overall performance of the silver coating by passivating the copper surface and regulating the silver deposition process.

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来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive