Back to results
US 2002/0172102 A1Published application
Magnetic head
AssigneeMatshushita Electric Industrial Co., Ltd.
InventorsOsamu Mizuno, Yutaka Murakami, Tohru Nakamura
Life of this patent
Estimating the term…
Abstract
A magnetic head is configured so that an aspect ratio w0/h0 of a cross section of a coil (11) is set to be 1 to 4, or preferably, approximately 1.5. This configuration suppresses the heat generation in the magnetic head that performs the magnetic field modulation, without impairing the efficiency, thereby making the magnetic head suitable for high-frequency modulation.
Claims8
A magnetic head comprising a magnetic core for mainly applying a modulated magnetic field to a medium, and a coil wound around the magnetic core,
- wherein a ratio α0 satisfies:
- 1≦α0≦4
- where
- α0≡w0/h0, and
- h0 and w0 represent dimensions of a cross-sectional area of the coil taken along a plane substantially orthogonally crossing a direction in which charges move when current is passed through the coil, h0 and w0 representing a dimension of the cross-sectional area in an excitation direction of the coil, and a dimension of the same in a direction perpendicular to the excitation direction, respectively.
2 more elements
Dependencies are inferred from the claim text.