Micropattern formation for magnetic recording head using electroless CoFeB deposition

Tokihiko Yokoshima, Seiichi Nakamura, Daiju Kaneko, Tetsuya Osaka*, Sanae Takefusa, Atsushi Tanaka

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


The method of electroless deposition of CoFeB thin films has been improved and used to fabricate the write head core for magnetic recording. The currently available method is poorly selective in depositing thin films on surfaces patterned with photoresist; i.e., the deposition occurs not only on the catalytic surface but also on the surface of the photoresist. To improve the selectivity, the effects of bath agitation and organic additives were investigated. Extraneous deposition on the photoresist was decreased by deposition with agitation in a paddle plating cell system and/or by adding thiodiglycolic acid in the bath without any effect on the coercivity of the resulting thin film. The new techniques enabled consistently uniform deposition of the film on the patterned surface of the write head core. The improved electroless deposition system operated under optimized conditions is suitable for future applications involving the deposition of the alloy in fine-patterned structures.

Original languageEnglish
Pages (from-to)C375-C382
JournalJournal of the Electrochemical Society
Issue number8
Publication statusPublished - 2002 Aug
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry


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