Thin-film magnetic head and manufacturing method of the head
AssigneeTDK Corporation
InventorAkifumi Kamijima
Life of this patent
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Abstract
A thin-film magnetic head has a recording head element that includes a lower magnetic pole, a recording gap, and an upper magnetic pole facing to the lower magnetic pole through the recording gap. The upper magnetic pole has a first width which is constant in a region from a first edge (lower edge) of the upper magnetic pole at the side of the recording gap to a point at a predetermined distance from the first edge, and has a second width at a second edge (upper edge) of the upper magnetic pole at the opposite side of the recording gap. The second width is larger than the first width.
Claims6
A thin-film magnetic head including a recording head element, said element comprising:
- a lower magnetic pole;
- a recording gap;
- and
- an upper magnetic pole facing to said lower magnetic pole through said recording gap,
- said upper magnetic pole having a first width which is constant in a region from a first edge of said upper magnetic pole at the side of said recording gap to a point at a predetermined distance from said first edge, and having a second width at a second edge of said upper magnetic pole at the opposite side of said recording gap, said second width being larger than said first width,
- wherein said first width of the upper magnetic pole is continuously varied from said point to said second edge,
- wherein an edge of said lower magnetic pole at the side of said recording gap has a protruded part facing to said upper magnetic pole, and wherein said protruded part has a width which is equal to the first width at said first edge of said upper magnetic pole.
A thin-film magnetic head including a recording head element, said element comprising:
- a lower magnetic pole;
- a recording gap;
- and
- an upper magnetic pole facing to said lower magnetic pole through said recording gap,
- said upper magnetic pole having a first width which is constant in a region from a first edge of said upper magnetic pole at the side of said recording gap to a point at a predetermined distance from said first edge, and having a second width at a second edge of said upper magnetic pole at the opposite side of said recording gap, said second width being larger than said first width,
- wherein said first width of the upper magnetic pole is continuously varied from said point to said second edge,
- wherein an edge of said lower magnetic pole at the side of said recording gap is flat.
Dependencies are inferred from the claim text.