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Effects of Surface Finish on Sn-3.0Ag-0.5Cu Solder Joint Microstructure and Strength

by Chaiprapa, J. , Abdul Razak, N. R. , Mohd Salleh, M. A. A. , Ramli, M. I. I. , Nogita, K. , Yasuda, H. , Muhd Amli, S. F. N.

in Characterization and Evaluation of Materials / Chemistry and Materials Science / Copper / Electronics and Microelectronics / Emerging Interconnection Technology / High speed / Instrumentation / Interconnect / Intermetallic compounds / Materials Science / Microstructure / Nickel / Optical and Electronic Materials / Pb-free Solder / Preservatives / Radiography / Shear strength / Solderability / Soldered joints / Soldering / Solders / Solid State Physics / Submerging / Surface finish / Synchrotron radiation / Synchrotrons / Tin base alloys / TMS2020 Advanced Microelectronic Packaging / TMS2020 Microelectronic Packaging / X-ray fluorescence

2021

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Effects of Surface Finish on Sn-3.0Ag-0.5Cu Solder Joint Microstructure and Strength

by Chaiprapa, J. , Abdul Razak, N. R. , Mohd Salleh, M. A. A. , Ramli, M. I. I. , Nogita, K. , Yasuda, H. , Muhd Amli, S. F. N.

2021

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Effects of Surface Finish on Sn-3.0Ag-0.5Cu Solder Joint Microstructure and Strength

by Chaiprapa, J. , Abdul Razak, N. R. , Mohd Salleh, M. A. A. , Ramli, M. I. I. , Nogita, K. , Yasuda, H. , Muhd Amli, S. F. N.

2021

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Journal Article

Effects of Surface Finish on Sn-3.0Ag-0.5Cu Solder Joint Microstructure and Strength

Chaiprapa, J.,

Abdul Razak, N. R.,

Mohd Salleh, M. A. A.,

Ramli, M. I. I.,

Nogita, K.,

Yasuda, H.,

Muhd Amli, S. F. N.

2021

Overview

The effects of copper organic solderability preservative (Cu-OSP) and electroless nickel immersion gold (ENIG) surface finish reflowed on Sn-3.0Ag-0.5Cu (SAC305) solder have been investigated in detail. Besides conventional cross-sectional microstructure observation, advanced characterization techniques such as synchrotron radiography imaging and synchrotron micro-x-ray fluorescence (µ-XRF) were utilized to elucidate the microstructural evolution in the solder joints during soldering. Additionally, high-speed shear testing was performed to understand the influence of the surface finish on the solder joint strength. The results indicated that the presence of nickel (Ni) from the ENIG surface finish decreased the growth rate but increased the amount of small Cu 6 Sn 5 primary intermetallics, resulting in a slight reduction of the average interfacial intermetallic compound (IMC) thickness in the SAC305/ENIG solder joints. Due to the refined control of the solder joint microstructure, the average high-speed shear strength was higher for as-reflowed SAC305/ENIG versus SAC305/Cu-OSP solder joints. These results indicate a significant influence of the surface finish on SAC305 solder joint microstructure and strength and could provide a basis to improve solder joint strength.

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Publisher

Springer US,Springer Nature B.V

Subject

Characterization and Evaluation of Materials

/ Chemistry and Materials Science

/ Copper

/ Electronics and Microelectronics

/ Emerging Interconnection Technology

/ High speed

/ Instrumentation