Magnetic recording medium

Patent 4582746 Issued on April 15, 1986. Estimated Expiration Date:

March 1, 2004. 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.

Abstract Claims Description Full Text

Patent References

Apparatus for fabrication of magnetic recording media
Patent #: 4220117
Issued on: 09/02/1980
Inventor: Shinohara

Metallic thin film magnetic recording medium
Patent #: 4323629
Issued on: 04/06/1982
Inventor: Kunieda , et al.

Magnetic recording medium
Patent #: 4418126
Issued on: 11/29/1983
Inventor: Izumi , et al.

Magnetic recording media and process of producing them
Patent #: 4419404
Issued on: 12/06/1983
Inventor: Arai , et al.

Method of making antistatic magnetic recording tapes and recording tapes
Patent #: 4429024
Issued on: 01/31/1984
Inventor: Ueno , et al.

Method and device for manufacturing magnetic recording medium
Patent #: 4450186
Issued on: 05/22/1984
Inventor: Shinohara

Magnetic recording medium Patent #: 4521482
Issued on: 06/04/1985
Inventor: Arai , et al.

Inventors

Application

No. 06/585095 filed on 03/01/1984

US Classes:

428/216, No layer or component greater than 5 mils thick360/134, Tape360/135, Disk360/136, Drum427/131, Applying superposed diverse coating or coating a coated base427/132, Metal coating427/488, Plasma initiated polymerization428/336, 1 mil or less428/835.2, Plasma-formed carbon overcoat428/900MAGNETIC FEATURE

Examiners

Primary: Robinson, Ellis P.

Attorney, Agent or Firm

Sughrue, Mion, Zinn, Macpeak & Seas

International Classes

G11B 5/71 (20060101)
G11B 5/64 (20060101)
G11B 5/72 (20060101)
G11B 5/85 (20060101)

Foreign Application Priority Data

1983-03-01 JP

Abstract

Weather resistance and lubricity of a magnetic recording medium comprising a non-magnetic support having provided thereon a vapor deposited magnetic thin film mainly composed of cobalt, nickel and oxygen can be improved by limiting the amount of nickel and the number of oxygen atoms to a specific value and by providing a plasma polymerized layer on the magnetic thin film.