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Magnetic recording medium, method for production thereof, and magnetic recording and reproducing device

A magnetic recording medium and magnetic recording technology, applied in the directions of magnetic recording, data recording, recording information storage, etc., can solve the problems that the discrete magnetic track media manufacturing technology does not appear, achieve excellent track isolation characteristics, avoid the appearance of particles, and avoid signal The effect of interference

Inactive Publication Date: 2009-04-08
SHOWA DENKO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] However, discrete track media fabrication techniques that pose little risk of contamination during fabrication and are capable of forming flat surfaces have not been available until now.

Method used

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  • Magnetic recording medium, method for production thereof, and magnetic recording and reproducing device
  • Magnetic recording medium, method for production thereof, and magnetic recording and reproducing device

Examples

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example 1

[0063] Similar to Comparative Example 2, the HD-oriented glass substrate was placed in a vacuum chamber, and the vacuum chamber was pre-evacuated to 1.0 × 10 -5 Pa or lower. The glass substrate used here is a Li 2 Si 2 o 5 、Al 2 o 3 -K 2 O, MgO-P 2 o 5 and Sb 2 o 3 - ZnO glass ceramics. The substrate had an outer diameter of 65 mm, an inner diameter of 20 mm, and an average surface roughness (Ra) of 2 Angstroms.

[0064] On the glass substrate, a FeCoB soft magnetic layer, a Ru interlayer and a 70Co-5Cr-15Pt-10SiO 2 Alloy magnetic layer, and further lamination of C (carbon) protective film layer and fluorine-based lubricating film by P-CVD method, the order of each layer is as described above. The thickness of the FeCoB soft magnetic layer is 600 angstroms, the thickness of the Ru intermediate layer is 100 angstroms, the thickness of the magnetic layer is 150 angstroms, and the average thickness of the C (carbon) protective film is 4 nm.

[0065] Afterwards, a mag...

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PUM

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Abstract

A discrete track-type magnetic recording medium (30) includes a nonmagnetic substrate (1), a magnetic recording track and a servo signal pattern that are provided on at least one side of the nonmagnetic substrate and a part (4) nonmagnetized through implantation (7) of ions from above a mask (6) having a shape of a pattern expected to be separated for physically separating the magnetic recording track and the servo signal pattern. A magnetic recording and reproducing device includes the magnetic recording medium (30), a driving part (26) serving to drive the magnetic recording medium in a direction of recording, a magnetic head (27) composed of a recording part and a reproducing part, means (28) to impart motion to the magnetic head relative to the magnetic recording medium and recording and reproducing signal processing means (29) for entering a signal into the magnetic head and reproducing an output signal from the magnetic head.

Description

[0001] Cross References to Related Applications [0002] This application is an application filed under 35 U.S.C. §111(a) to obtain a provisional filed under 36 U.S.C. §111(b) on February 27, 2006 under 35 U.S.C. §119(e)(1) Application No. 60 / 776,732 and Japanese Patent Application No. 2006-044295 filed on February 21, 2006 and No. 2006-111833 filed on April 14, 2006. technical field [0003] The present invention relates to a magnetic recording medium used in a hard disk drive, a manufacturing method of the magnetic recording medium, and a magnetic recording and reproducing apparatus. Background technique [0004] In recent years, magnetic recording devices such as hard disk drives, floppy disk drives, and magnetic tape drives have greatly expanded their use and gained importance. Much work has been devoted to significantly increasing the recording density of the magnetic recording media used in these devices. In particular, since the introduction of magnetoresistive (MR)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/85G11B5/65
Inventor 福岛正人坂胁彰佐佐木保正
Owner SHOWA DENKO KK
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