Narrow-Gap Read Head Using a High-Resistance Magnetic Shield

DOI NDL Digital Collections Web Site 5 References
  • Hoshino K.
    Storage Technology Research Center, Hitachi, Ltd. (Kanagawa)
  • Kimura H.
    Storage Technology Research Center, Hitachi, Ltd. (Kanagawa)
  • Takahashi H.
    Storage Technology Research Center, Hitachi, Ltd. (Tokyo)
  • Nakamoto K.
    Storage Technology Research Center, Hitachi, Ltd. (Kanagawa)
  • Ide H.
    Storage Technology Research Center, Hitachi, Ltd. (Kanagawa)
  • Watanabe K.
    Storage Technology Research Center, Hitachi, Ltd. (Kanagawa)
  • Hoshiya H.
    Storage Technology Research Center, Hitachi, Ltd. (Kanagawa)

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Other Title
  • 高抵抗シールド膜を用いた狭ギャップ再生ヘッド
  • コウテイコウ シールド マク オ モチイタ キョウギャップ サイセイ ヘッド

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Description

A narrow-gap read head with a high-resistance magnetic film was investigated. The film has a resistance of more than 10 m Ω cm and good soft magnetic properties. The high-resistance shield head comprises a GMR film, insulator films for the read-gap, high-resistance magnetic films, insulator films to prevent breakdown of the head, and magnetic shield films. The fabricated high-resistance shield head shows a good output waveform. However, it has a slightly larger half-amplitude pulse width (PW50) value than a conventional shield head, because the permeability of the high-resistance magnetic film is insufficiently high. We concluded that a read head using a high-resistance shield with high permeability would be a suitable candidate for a narrow-gap read head.

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