Journal of the Microelectronics and Packaging Society (마이크로전자및패키징학회지)

The Korean Microelectronics and Packaging Society (한국마이크로전자및패키징학회)
권호 표지

Electrodeposition of Permalloy-Silica Composite Coating

전기도금법을 이용한 퍼멀로이-실리카 복합도금

  • Jung, Myung-Won (Dept. of Materials Science and Engineering, Hongik University) ;
  • Kim, Jong-Hoon (Dept. of Materials Science and Engineering, Hongik University) ;
  • Lee, Heung-Yeol (Div. of Production Technology, Korea Institute of Industrial Technology) ;
  • Lee, Jae-Ho (Dept. of Materials Science and Engineering, Hongik University)
  • 정명원 (홍익대학교 신소재공학과) ;
  • 김종훈 (홍익대학교 신소재공학과) ;
  • 이흥렬 (한국생산기술연구원 생산기반연구본부) ;
  • 이재호 (홍익대학교 신소재공학과)
  • Received : 2010.12.07
  • Accepted : 2010.12.27
  • Published : 2010.12.30
Download PDF
⟨ Previous Next ⟩

Abstract

The composite electroplating is accomplished by adding inert materials during the electroplating. Permalloy is the term for Ni-Fe alloy and it is used for industrial applications due to its high magnetic permeability. Microhardness for microdevices is enhanced after composite coating and it increases the life cycle. However, the hydroxyl group on the silica makes their surface susceptible to moisture and it causes the silica nanoparticles to be agglomerated in the aqueous solution. The agglomeration problem causes poor dispersion which eventually interrupts uniform deposition of silica nanoparticles. In this study, the dispersion of silica nanoparticles in the permalloy electroplated layer is reported with variation of additives and sonication time. Longer sonication period guaranteed better silica nanopowder dispersion and sonication period also influenced on composition of deposits. The amount of silica nanopowder codeposition and surface morphologies were influenced with variation of additives. In alkaline bath, smooth surface morphology and relatively high contents of silica nanopowder codeposition were obtained with addition of sodium lauryl sulfate.

복합전기도금은 도금 중 반응성이 없는 물질을 첨가하여 도금층 내부에 함께 존재하도록 함으로써 이루어진다. 퍼멀로이는 철과 니켈의 합금을 말하는 것으로써 높은 투자율를 나타내기 때문에 산업 여러 분야에 응용된다. 복합도금을 통해 제품의 미세경도를 향상시킬 수 있으며 이는 제품의 수명과 연관된다. 하지만 실리카 나노분말 표면의 수산화기는 표면을 수분에 취약하게 만들고 이는 나노분말의 응집을 발생시켜 균일한 도금층의 형성을 어렵게 하는 요인이 된다. 본 연구에서는 실리카 나노분말의 응집을 줄이기 위하여 첨가제의 변화, 초음파 처리 시간의 변화를 살펴보았다. 초음파 처리시간의 증가시 입자의 분산효과가 좋았고 조성의 변화가 발생하였다. 첨가제에 따라 표면 형상과 공석되는 실리카 나노입자의 함량 차이가 나타났다. 염기성 도금용액에서 sodium lauryl sulfate를 사용하였을 경우 표면이 매끄럽고 공석되는 실리카 나노분말의 양도 높았다.

Keywords

References

  1. H. K. Um, H. Y. Lee, T. H. Yim and J. H. Lee, "The Effects of Pretreatment and Surfactants on CNT and Permalloy Composite Electroplating", J. Microelectron. Packag. Soc., 17(1), 63 (2010).
  2. H. A. Esfahani, M. R. Vaezi, L. Nikzad, B. Yazdani and S. K. Sadrnezhaad, "Influence of SiC nanoparticles and saccharin on the structure and properties of electrodeposited Ni-Fe/SiC nanocomposite coatings", J. of Alloy. Compd., 484(1-2), 540 (2009). https://doi.org/10.1016/j.jallcom.2009.04.146
  3. A. Brenner, Electrodeposition of Alloys, Academic Press, 194-195(1963).
  4. H. Dahms and I. M. Croll, "The Anomalous Codeposition of Iron-Nickel Alloys", J. Electrochem. Soc., 112(8), 771 (1965). https://doi.org/10.1149/1.2423692
  5. S. Biallozor and M. Lieder, "Study of the electrodeposition process on Ni-Fe alloys from chloride electrolytes: ", Surf. Technol., 21(1), 1 (1984). https://doi.org/10.1016/0376-4583(84)90142-0
  6. Y. K. Ko, T. H. Yim and J. H. Lee, "The Effects of Electroplating Parameters on the Mechanical Properties of Nickel-Iron Alloy Electrodeposits", J. Microelectron. Packag. Soc., 15(4), 71 (2008).
  7. S. N. Srimathi and S. M. Mayanna, "Electrolytic preparation of Fe-Ni alloy", J. Mater. Sci. Lett., 4(7), 904 (1985). https://doi.org/10.1007/BF00720535
  8. C. T. J. Low, R. G. A. Wills and F. C. Walsh, "Electrodeposition of Composite Coatings Containing nanoparticles in a Metal Deposit", Surf. Coat. Technol., 201(1-2), 371 (2006). https://doi.org/10.1016/j.surfcoat.2005.11.123
  9. X. K. Ma, N. H. Lee, H. J. Oh, J. W. Kim, C. K. Rhee, K. S. Park and S. J. Kim, "Surface modification and characterization of highly dispersed silica nanoparticles by a cationic surfactant", Colloids Surf. A: Physicochem. Eng. Aspects, 358(1-3), 172 (2010). https://doi.org/10.1016/j.colsurfa.2010.01.051
  10. X. Wang, M. Wang, H. Song and B. Ding, "A simple sol-gel technique for preparing lanthanum oxide nanopowders", Mater. Lett., 60(17-18), 2261 (2006). https://doi.org/10.1016/j.matlet.2005.12.142