Magnetic head arrangement
First Claim
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.
1 Assignment
0 Petitions
Accused Products
Abstract
A magnetic head arrangement includes a spiral coil made of a thin layer and having a central opening. The spiral coil is deposited on a first layer of magnetic material in an electrically insulated manner. The arrangement further includes a second layer of magnetic material having a width wider than that of the central opening of the spiral coil and deposited on the spiral coil in an electrically insulated manner. A portion of the second layer located in the central opening of the spiral coil is magnetically connected with the first layer and another portion of the second layer located outside the spiral coil is held above the first layer to form a predetermined gap.
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Citations
7 Claims
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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:
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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. - View Dependent Claims (2, 6, 7)
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3. 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:
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a non-electrically conductive first magnetic layer; an electrically conductive layer formed on said first magnetic layer, said electrically conductive layer being in the shape of a spiral having a central opening; an 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 electrically nsulating 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 first magnetic layer having formed therein a groove confronting at least said portion of said spiral covered by said electrically insulating layer and said intermediate portion; a non-magnetic material filling said groove; 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. - View Dependent Claims (4, 5)
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Specification