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솔더조인트의 신뢰성 표준화를 위한 취성파괴 메커니즘 및 평가법 연구

Failure Mechanism and Test Method for Reliability Standardization of Solder Joints

  • 투고 : 2011.09.20
  • 심사 : 2011.12.26
  • 발행 : 2011.12.30

초록

솔더 접합부의 품질 신뢰성 문제는 얼라인먼트(Alignment)문제로 발생한 오픈불량, 기판 휨에 의한 HIP(Head In Pillow)불량, 열팽차 차이에 의한 솔더자체 크랙과 기계적인 충격에 의한 IMC층의 크랙이 중요한 불량이다. 특히 기판 소형화와 표면처리의 변화가 진행 되면서, 솔더 범프와 기판 사이 IMC층의 취성파괴가 더욱 이슈화가 되면서 연구가 활발하다. IMC의 형성과 성장 및 취성파괴의 메카니즘 연구를 통하여 기존 평가방법의 변별력 향상, 계량화 등의 개선이 필요하고, IMC 취성의 수준 향상 등 크랙에 대한 신뢰성 향상 방향을 위한 연구 방향을 제시하고자 한다.

With regard to reliability of solder joint, the significant failures include open defects that occurs from alignment problem, Head in Pillow by PCB's warpage, the crack of solder by CTE mismatch, and the crack of IMC layer by mechanical impact. Especially as PCB down-sizing and surface finish is under progress, brittle failure of IMC layer between solder bump and PCB pad becomes a big issue. Therefore, it requires enhancing the level of difficulty in the existing assessment method and improving the measurement through the study on the mechanism of IMC formation, growth and brittle failure. Under this circumstance, this study is intended to suggest the direction of research for improving the reliability on the crack such as improvement of IMC brittle fracture.

키워드

참고문헌

  1. D. Amir, R. Aspandiar, S. Buttars, W. W. Chin and P. Grill, "Head-and-Pillow SMT Failure Modes", Proc. SMTA International Conference, San Diego, Surface Mount Technology Association (SMTA) (2009).
  2. 박재현, "무연 솔더볼 접합부의 신뢰성평가 방법", RIST 연구 논문, 19(2), 101 (2005).
  3. 고병각, 박부희, 김강동, 장중순, "FCBGA의 솔더조인트 신 뢰성 보증을 위한 정량적인 시험법" 한국경영과학회/대학산 업공학회 춘계공동학술대회 논문집, 933, 한국경영과학회/대학산업공학회 (2005).
  4. A. Zribi, A. Clark, L. Zavalij, P. Borgesen and E. J. Cotts, "The Growth of Intermetallic Compounds at Sn-Ag-Cu Solder/ Cu and Sn-Ag-Cu Solder/Ni Interfaces and Associated Evolution of the Solder Microstructure" J. Electron. Mater., 30(9), 1157 (2001). https://doi.org/10.1007/s11664-001-0144-6
  5. W. K. Choi, J. H. Kim, S. W. Jeong and H. M. Lee, "Interfacial Microstructure and Joint Strength of Sn-3.5 Ag- X(X=Cu, In, Ni) Solder Joint", J. Mater. Res., 17(1), 43 (2002). https://doi.org/10.1557/JMR.2002.0009
  6. W. Peng, E. Monlevade and M. E. Marques, "Effect of Thermal Aging on the Interfacial Structure of SnAgCu Solder Joints on Cu" Microelectron. Reliab., 47(12), 2161 (2007). https://doi.org/10.1016/j.microrel.2006.12.006
  7. C. E. Ho, Y. W. Lin, S. C. Yang, C. R. Kao and D. S. Jiang, "Effects of Limited Cu Supply on Soldering Reactions between SnAgCu and Ni" J. Electron. Mater., 35(5) (2006).
  8. K. L. Lin and P. C. Shih, "IMC Formation on BGA Package with Sn-Ag-Cu and Sn-Ag-Cu/Ni-Ge Solder Balls", J. Alloys Compd., 452(2), 291 (2008).
  9. 손정민, 장미순, 곽계달, "Al Wire와 Al Pad 사이의 IMC (Intermertallic Compound) 형성에 의한 수명예측", 대한기계 학회 추계학술대회 논문집, 1295, 대한기계학회 (2008).
  10. Y. C. Sohn, J. Yu, S. K. Kang, D. Y. Shih and T. Y. Lee, "Spalling of Intermetallic Compounds during the Reaction between Lead-free Solders and Electroless Ni-P Metallization", J. Mater. Res., 19(8), 2428 (2004). https://doi.org/10.1557/JMR.2004.0297
  11. J. W. R. Teo and Y. F. Sun, "Spalling Behavior of Interfacial Intermetallic Compounds in Pb-free Solder Joints Subjected to Temperature Cycling Loading", Acta Mater., 56, 242 (2008). https://doi.org/10.1016/j.actamat.2007.09.026
  12. Y. C. Sohn, J. Yu, S. K. Kang, D. Y. Shih and T. Y. Lee, "Spalling of Intermetallic Compound during the Reaction between Electroless Ni(P) and Lead-free Solders", J. Microelectron. Packag. Soc., 11(3), 37 (2004).
  13. G. Milad, "Is "Black Pad" Still an Issue for ENIG?", Circuit World, 36(1), 10 (2010). https://doi.org/10.1108/03056121011015040
  14. D. J. Lee, J. W. Chio and S. H. Cho, "Study on Surface Morphology Control of Electroless Ni-P for Reliability Improvement of Solder Joints", J. Microelectron. Packag. Soc., 15(3), 27 (2008).
  15. 김성걸, 김주영, 김상현, 양우찬, 정호동, 김재호, "플립칩 솔 더 접합부의 신뢰성평가를 위한 보드레벨 낙하해석", 한국공 작기계학회 춘계학술대회 논문집, 188, 한국공작기계학회 (2008).
  16. J. Y. Kim and J. Yu, "A Study of Kirkendall Void Formation and Impact Reliability at the Electroplated Cu/Sn-3.5Ag Solder Joint", J. Microelectron. Packag. Soc., 15(1), 33 (2008).
  17. 이용성, 정종설, 이재현, 신기훈, 정성균, "보드 레벨 플립칩의 4점 굽힘 시험시 파단 특성 연구", 한국공작기계학회 춘계학술대회 논문집, 121, 한국공작기계학회 (2008).
  18. P. F. Yang, Y. S. Lai, S. R. Jian, J. Chen and R. S. Chen, "Nanoindentation Identifications of Mechanical Properties of Cu6Sn5, Cu3Sn, and Ni3Sn4 Intermetallic Compounds Derived by Diffusion Couples", Mater. Sci. & Eng. A, 485, 305 (2008). https://doi.org/10.1016/j.msea.2007.07.093
  19. S. H. Huh, K. D. Kim and J. S. Jang, "The Effect of Reliability Test on Failure Mode for Flip-chip BGA C4 Bump", J. Microelectron. Packag. Soc., 18(3), 45 (2011).
  20. K. Suganuma and K. S. Kim, "The Root Causes of the Black Pad Phenomenon and Avoidance Tactics", JOM, 60(6), 61 (2008). https://doi.org/10.1007/s11837-008-0074-3
  21. S. H. Huh, K. D. Kim, K. S. Kim and J. S. Jang, "A Novel High Speed Shear Test for Lead-free Flip Chip Packages", Eelecton. Matter. Lett., in press.
  22. K. Yamanaka, "Electromigration and Thermomigration in Flip-chip Joints in a High Wiring Density Semiconductor Package", J. Microelectron. Packag. Soc., 18(3), 67 (2011).