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자료유형
학술저널
저자정보
이지혜 (삼성전기) 허석환 (삼성전기) 정기호 (삼성전기) 함석진 (삼성전기)
저널정보
대한용접·접합학회 대한용접·접합학회지 大韓熔接·接合學會誌 第32卷 第3號
발행연도
2014.6
수록면
60 - 67 (8page)

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The ability of electronic packages and assemblies to resist solder joint failure is becoming a growing concern. This paper reports on a study of high speed shear energy of Sn-4.0wt%Ag-0.5wt%Cu (SAC405) solder with different electroless Ni-P thickness, with HNO3 vapor’s status, and with various pre-conditions. A high speed shear testing of solder joints was conducted to find a relationship between the thickness of Ni-P deposit and the brittle fracture in electroless Ni-P deposit/SAC405 solder interconnection. A focused ion beam (FIB) was used to polish the cross sections to reveal details of the microstructure of the fractured pad surface with and without HNO3 vapor treatment. A scanning electron microscopy (SEM) and an energy dispersive x-ray analysis (EDS) confirmed that there were three intermetallic compound (IMC) layers at the SAC405 solder joint interface: (Ni,Cu)₃Sn₄ layer, (Ni,Cu)₂SnP layer, and (Ni,Sn)₃P layer. The high speed shear energy of SAC405 solder joint with 3㎛ Ni-P deposit was found to be lower in pre-condition level#2, compared to that of 6㎛ Ni-P deposit. Results of focused ion beam and energy dispersive x-ray analysis of the fractured pad surfaces support the suggestion that the brittle fracture of 3㎛ Ni-P deposit is the result of Ni corrosion in the pre-condition level#2 and the HNO3 vapor treatment.

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Abstract
1. 서론
2. 실험 방법
3. 실험 결과 및 고찰
4. 결론
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