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Electrodeposition of Permalloy-Silica Composite Coating  

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)
Publication Information
Journal of the Microelectronics and Packaging Society / v.17, no.4, 2010 , pp. 83-88 More about this Journal
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.
Keywords
Composite plating; Dispersion; Silica nanopowder; Additive;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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