Design and performance test of comb-shaped clamp/spacer for improvement of recirculation filter efficacy in a hard disk drive

Sung Eun Park, Dae Young Lee, Jae Hong Park, Tae Sik Kang, Jin Gyoo Yoo, Jungho Hwang

Research output: Contribution to journalArticle

3 Citations (Scopus)


With the recent increase of the rotational speed of hard disk drives, nanoparticle contamination can cause serious problems including thermal asperity. We designed a comb-shaped clamp and spacer to improve the efficacy of the recirculation filter in the operation of the hard disk drive (HDD). We calculated flow characteristics by a commercial computational fluid dynamics (CFD) code for six cases of the comb-shaped clamp and spacer. The calculation results showed that the outward velocity was the highest when the comb-shape angle was 45°. We measured temporal variations of particle concentration during the operation of the HDD by experiments. Considering the decay rate and the percent clean-up of particle concentration, we found the case of 45° to be the best design.

Original languageEnglish
Article number4773573
Pages (from-to)201-205
Number of pages5
JournalIEEE Transactions on Magnetics
Issue number1
Publication statusPublished - 2009 Jan 1


All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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