U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Magnetic head

Patent 4866555 Issued on September 12, 1989. Estimated Expiration Date: Icon_subject November 4, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

Thin film magnetic recording transducer having embedded pole piece design
Patent #: 4517616
Issued on: 05/14/1985
Inventor: Bischoff

Magnetic head and method of fabricating same
Patent #: 4559572
Issued on: 12/17/1985
Inventor: Kumasaka ,   et al.

Composite type magnetic head for recording and reproducing high frequency signals
Patent #: 4656547
Issued on: 04/07/1987
Inventor: Kumasaka ,   et al.

Amorphous magnetic head Patent #: 4755898
Issued on: 07/05/1988
Inventor: Higashionji ,   et al.

Inventors

Assignee

Application

No. 07/116345 filed on 11/04/1987

US Classes:

360/126, Laminated360/122Head surface structure

Examiners

Primary: Wolff, John H.
Assistant: Bussan, Matthew J.

Attorney, Agent or Firm

International Classes

G11B 5/187 (20060101)
G11B 5/255 (20060101)

Foreign Application Priority Data

1986-11-07 JP

Abstract

A magnetic head having a first core half body constituted by a first non-magnetic base and a magnetic layer made of a high-permeability magnetic material and formed on the first non-magnetic base, and a second core half body constituted by a second non-magnetic base and a magnetic layer made of a high-permeability magnetic material and formed on the second non-magnetic base. This magnetic head is provided with a track width regulation groove communicating with at least one of recording medium sliding surfaces of the first and second non-magnetic bases, the track width regulation groove being filled with the magnetic layer; and abutting surfaces formed on the sides of the track width regulation groove opposite to each other in the widthwise direction of the track, the abutting surfaces being parallel to the surface of mating one of the first and second core half bodies when the abutting surfaces abut there-against. The first and second core half bodies are connected to each other by at least a portion of the abutting surfaces.

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