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Magnetic head arrangement

  • US 4,409,632 A
  • Filed: 11/19/1980
  • Issued: 10/11/1983
  • Est. Priority Date: 11/20/1979
  • Status: Expired due to Term
First Claim
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1. A magnetic head arrangement including a plurality of magnetic head units aligned with a predetermined pitch along a first direction orthogonal to a second direction of movement of a recording medium, each said magnetic head unit comprising:

  • a first magnetic layer;

    a first electrically insulating layer in contact with said first magnetic layer;

    an electrically conductive layer formed directly on said first electrically insulating layer, said electrically conductive layer being in the shape of a spiral having a central opening;

    a second electrically insulating layer covering a portion of said spiral which is wider than said central opening;

    a second magnetic layer having a contacting portion within said central opening and in magnetic connection with said first magnetic layer, an intermediate portion located above said portion of said spiral and electrically insulated therefrom by said second electrically insulating layer, and a gap forming portion positioned exteriorly of said spiral and forming with said first magnetic layer a predetermined gap adapted to confront a recording medium;

    said second magnetic layer including said gap forming portion having a width in said first direction greater than the width in said first direction of said central opening; and

    the total length of a border between said contacting portion and said intermediate portion being equal to or greater than the width in said first direction of said gap forming portion.

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