Enhanced magnetic properties of bit patterned magnetic recording media by trench-filled nanostructure

Chulmin Choi, Daehoon Hong, Young Oh, Kunbae Noh, Jin Yeol Kim, Leon Chen, Sy Hwang Liou, Sungho Jin

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

The structure and properties of nanoscale magnetic island arrays for bit patterned media (BPM) have been studied. A periodic Si nano-island array was fabricated by nano-imprint-lithography (NIL), with the trench-filling and flattening achieved by resist spin coating followed by reactive ion back-etching. A Co/Pd multilayer magnetic media with a perpendicular anisotropy was then sputtered and lifted-off so that the processed nanostructure array now has the magnetic material only on the top of the pillars. This process significantly improved the magnetic characteristics of BPM. A planarization by hydrogen silsesquioxane filling reduced the tribological interference of the protruding nanoisland heights in BPM.

Original languageEnglish (US)
Pages (from-to)113-116
Number of pages4
JournalElectronic Materials Letters
Volume6
Issue number3
DOIs
StatePublished - Sep 2010

Keywords

  • Bit patterned media
  • Filling and planarization
  • Nano imprint lithography

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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