Annealing effect and tensile interface fracture mechanism of pure silver bonding wires

Hao Wen Hsueh, Fei Yi Hung, Truan Sheng Lui, Li Hui Chen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Since Ag wires have similar hardness and bonding properties to Au wires, they can be applied in some pads. In the present study, the annealing effect (at 225°C-275°C for 30min) on the tensile mechanical properties of silver wires wih φ=23μm was investigated. In addition, the microstructural characteristics and the mechanical properties before and after an electric flame-off (EFO) process were also studied. Experimental results indicate that with annealing temperatures of more than 250°C, the silver wires possessed a fully annealed structure, the tensile strength and the hardness decreased, and the elongation was raised significantly. Under fte thermal effect of EFO, the necks of the Ag balls underwent recrystallization and grain growth was induced, and the annealed Ag wires had a shorter zone of HAZ (220μm). The bonding strength and the neck-strength of the Ag wires were more than 7gf and possessed excellent bonding properties.

Original languageEnglish
Title of host publicationExtraction and Processing Division - 2012 EPD Congress - Held During the TMS 2012 Annual Meeting and Exhibition
Pages145-152
Number of pages8
Publication statusPublished - 2012 May 15
Event2012 EPD Congress - TMS 2012 Annual Meeting and Exhibition - Orlando, FL, United States
Duration: 2012 Mar 112012 Mar 15

Publication series

NameTMS Annual Meeting

Other

Other2012 EPD Congress - TMS 2012 Annual Meeting and Exhibition
CountryUnited States
CityOrlando, FL
Period12-03-1112-03-15

Fingerprint

Silver
silver
wire
Wire
Annealing
annealing
flames
hardness
Hardness
mechanical properties
Mechanical properties
heat affected zone
Grain growth
Thermal effects
tensile strength
elongation
temperature effects
balls
Elongation
Tensile strength

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

Cite this

Hsueh, H. W., Hung, F. Y., Lui, T. S., & Chen, L. H. (2012). Annealing effect and tensile interface fracture mechanism of pure silver bonding wires. In Extraction and Processing Division - 2012 EPD Congress - Held During the TMS 2012 Annual Meeting and Exhibition (pp. 145-152). (TMS Annual Meeting).
Hsueh, Hao Wen ; Hung, Fei Yi ; Lui, Truan Sheng ; Chen, Li Hui. / Annealing effect and tensile interface fracture mechanism of pure silver bonding wires. Extraction and Processing Division - 2012 EPD Congress - Held During the TMS 2012 Annual Meeting and Exhibition. 2012. pp. 145-152 (TMS Annual Meeting).
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Hsueh, HW, Hung, FY, Lui, TS & Chen, LH 2012, Annealing effect and tensile interface fracture mechanism of pure silver bonding wires. in Extraction and Processing Division - 2012 EPD Congress - Held During the TMS 2012 Annual Meeting and Exhibition. TMS Annual Meeting, pp. 145-152, 2012 EPD Congress - TMS 2012 Annual Meeting and Exhibition, Orlando, FL, United States, 12-03-11.

Annealing effect and tensile interface fracture mechanism of pure silver bonding wires. / Hsueh, Hao Wen; Hung, Fei Yi; Lui, Truan Sheng; Chen, Li Hui.

Extraction and Processing Division - 2012 EPD Congress - Held During the TMS 2012 Annual Meeting and Exhibition. 2012. p. 145-152 (TMS Annual Meeting).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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N2 - Since Ag wires have similar hardness and bonding properties to Au wires, they can be applied in some pads. In the present study, the annealing effect (at 225°C-275°C for 30min) on the tensile mechanical properties of silver wires wih φ=23μm was investigated. In addition, the microstructural characteristics and the mechanical properties before and after an electric flame-off (EFO) process were also studied. Experimental results indicate that with annealing temperatures of more than 250°C, the silver wires possessed a fully annealed structure, the tensile strength and the hardness decreased, and the elongation was raised significantly. Under fte thermal effect of EFO, the necks of the Ag balls underwent recrystallization and grain growth was induced, and the annealed Ag wires had a shorter zone of HAZ (220μm). The bonding strength and the neck-strength of the Ag wires were more than 7gf and possessed excellent bonding properties.

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Hsueh HW, Hung FY, Lui TS, Chen LH. Annealing effect and tensile interface fracture mechanism of pure silver bonding wires. In Extraction and Processing Division - 2012 EPD Congress - Held During the TMS 2012 Annual Meeting and Exhibition. 2012. p. 145-152. (TMS Annual Meeting).