Verticle magnetic recording medium and its manufacturing method and magnetic recording/reproduing device

A technology of perpendicular magnetic recording and media, applied in magnetic recording, data recording, recording information storage, etc., which can solve the problem of signal-to-noise ratio reduction

Inactive Publication Date: 2004-10-20
KK TOSHIBA +1
View PDF1 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the signal-to-noise ratio (SNR) of the recording / reproducing (R / W) characteristic decreases

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Verticle magnetic recording medium and its manufacturing method and magnetic recording/reproduing device
  • Verticle magnetic recording medium and its manufacturing method and magnetic recording/reproduing device
  • Verticle magnetic recording medium and its manufacturing method and magnetic recording/reproduing device

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0056] The present invention will be described in more detail through examples below.

specific Embodiment approach 1

[0057] Prepare a non-magnetic glass substrate in the shape of a 2.5-inch hard disk.

[0058] The vacuum chamber of a sputtering device is evacuated to 2 x 10 -5 Pa or less, in a 0.67-Pa Ar environment by using Co 84 Zr 6 Nb 10 target and Ta target, forming a 200-nm thick Co 84 Zr 6 Nb 10 The soft magnetic layer and the 8-nm thick Ta layer serve as a soft magnetic layer and a first underlayer, respectively. After that, a 15-nm thick Ru layer was laminated as a second underlayer in a 3-Pa Ar environment.

[0059] Subsequently, a composite target was obtained by adding 0-30 mol% InP as a matrix material to Co-10at%Cr-14at%Pt as a magnetic grain material, through which a 20-nm thick magnetic recording layer. Afterwards, a 7-nm thick C layer was stacked as a protective layer in a 0.67-Pa Ar environment. After the thin film was formed, the surface of the protective layer was coated with a 13 Å thick perfluoropolyether (PEPE) lubricant by dipping to obtain a magnetic recordi...

specific Embodiment approach 2

[0080] Prepare a non-magnetic glass substrate in the shape of a 2.5-inch hard disk.

[0081] The vacuum chamber of a sputtering device is evacuated to 2 x 10 -5 After -Pa or less, a 5-nm thick Te layer was formed as a first underlayer in a 0.67-Pa Ar environment. After that, a 15-nm thick Ru layer was laminated as a second underlayer in an 8-Pa Ar environment.

[0082] Subsequently, under an Ar environment of 8-Pa, using a Co-10at%Cr-14at%Pt target as the magnetic grain material and an InP target as the matrix material, a 15-nm thick magnetic film was formed by simultaneous sputtering of the two targets. record layer. During the sputtering process, the electric power for each target was controlled to be able to properly vary the addition amount of the matrix material between 0-30 mol% relative to the magnetic grain material. Then a 7-nm thick C layer was stacked as a protective layer in a 0.67-Pa Ar environment. After film formation, the surface of the protective layer was...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to view more

Abstract

Disclosed is a magnetic recording medium which includes a substrate, an underlayer, and a perpendicular magnetic recording layer, and in which this perpendicular magnetic recording layer contains magnetic crystal grains and a matrix surrounding the magnetic crystal grains, and the matrix contains an element selected from Zn, Cd, Al, Ga, and In, and a component selected from P, As, Sb, S, Se, and Te.

Description

technical field [0001] The present invention relates to a magnetic recording medium applied to a hard disk drive using magnetic recording technology, a method of manufacturing the magnetic recording medium, and a magnetic recording / reproducing apparatus. Background technique [0002] Magnetic storage devices (HDDs), which are mainly used in computers to record and reproduce information, have recently gradually expanded their applications because of their large capacity, low price, fast data access speed, and reliable data retention. HDDs are currently used in various fields such as home video recorders, audio equipment, and car navigation systems. As the range of applications of HDDs has widened, the demand for increased storage capacity or density of HDDs has also increased. In recent years, high-density HDDs are being developed more and more widely. [0003] A longitudinal magnetic recording system for a magnetic recording / reproducing apparatus is currently on the market...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/65G11B5/64G11B5/85H01F10/14H01F10/16H01F41/20
CPCG11B5/656G11B5/65G11B5/653
Inventor 前田知幸彦坂和志中村太岩崎刚之酒井浩志清水谦治坂腋彰
Owner KK TOSHIBA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap