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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Kumar, Aditya Zhong Chen |
| Copyright Year | 2005 |
| Description | Author affiliation: Sch. of Mater. Sci. & Eng., Nanyang Technol. Univ., Singapore (Aditya Kumar; Zhong Chen) |
| Abstract | Tensile strength and fracture behavior of thermally aged Cu/electroless Ni-P/Sn-3.5Ag solder joint were examined for three different Ni-P thicknesses (3.9, 7.3, and 9.9 mum) to comprehend the mechanical reliability of the solder joint. The tensile testing results showed that the Ni-P thickness influences the solder joint strength considerably. In the case of thin Ni-P, the tensile strength decreased with increase in aging duration, whereas, it increased in the case of thicker Ni-P. The failure mode and fracture surfaces were also found to depend upon the Ni-P thickness. In the solder joint with thick Ni-P, failure mode was ductile and fracture surfaces were inside the bulk solder. Whereas in the joint with thin Ni-P, with aging duration, failure mode changed from ductile to brittle and fracture surfaces shifted from inside the bulk solder to the $(Ni_{1-x}Cu_{x$ $})_{3}Sn_{4}/Ni-Sn-P$ and $Ni_{3}P/Cu$ interfaces. The depletion of Cu from the $Ni_{3}P/Cu$ interface and formation of $(Ni_{1-x}Cu_{x})_{3}Sn_{4$ intermetallic at the $Ni_{3}Sn_{4}/Ni-Sn-P$ interface were found to be the main causes for the brittle failure. The Cu depletion resulted in formation of layer of voids at the Ni3 P/Cu interface and thereby in loss of adhesion between Ni3 P layer and Cu surface |
| File Size | 5751755 |
| File Format | |
| ISBN | 0780395786 |
| DOI | 10.1109/EPTC.2005.1614522 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2005-12-07 |
| Publisher Place | Singapore |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Soldering Environmentally friendly manufacturing techniques Lead Nickel Aging Intermetallic Electronics packaging Surface cracks Metallization Tin |
| Content Type | Text |
| Resource Type | Article |
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