Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Super-high density vertical magnetic recording medium and method for making same

A technology of perpendicular magnetic recording and magnetic recording media, which is applied in the field of information storage, can solve the problems of low efficiency in commercial mass production, unfavorable operations by ordinary technicians, and harsh preparation conditions, and achieve good industrial production prospects, simple equipment, and crystal grains. small size effect

Inactive Publication Date: 2007-09-19
山西师范大学
View PDF0 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This preparation method has high cost and harsh preparation conditions, which is not conducive to the operation of ordinary technicians, and the efficiency of commercial batch production is low

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
  • Super-high density vertical magnetic recording medium and method for making same
  • Super-high density vertical magnetic recording medium and method for making same
  • Super-high density vertical magnetic recording medium and method for making same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: prepare [CoPt (3nm) / C (3nm)] 5 / Ag (10nm) / the multilayer film magnetic recording medium of glass substrate

[0030] Follow these steps:

[0031] (1) Ultrasonic cleaning the 0.1cm thick glass substrate with electronic cleaning solution, distilled water and alcohol to remove oil stains and other impurity ions on the surface of the substrate, then put the cleaned substrate into the sputtering chamber, and install A CoPt composite target, an Ag target, and a non-magnetic material C target, wherein the CoPt atomic ratio in the CoPt composite target is 1:1.

[0032] (2) Pump the sputtering chamber, when the background vacuum of the sputtering chamber is better than 2×10 -4 Pa, pass through the working gas Ar gas to keep the working pressure between 5Pa and 6Pa. After starting each working target position to make it glow normally, select the appropriate sputtering power of each target to pre-sputter the target for several minutes to clean the target surface. The...

Embodiment 2

[0039] Embodiment 2: prepare [CoPt (3nm) / BN (2.5nm)] 5 / Ag (10nm) / the multilayer film magnetic recording medium of glass substrate

[0040] Adopt the same step as Example 1, first deposit the Ag bottom layer of 10nm on the glass substrate, then get the CoPt layer of 3nm to the CoPt target sputtering 11s, then to the BN target (the BN target sputtering power is 150W, and the target base distance is 6cm, the sputtering rate is 0.0487nm / s) to obtain a 2.5nm BN layer by sputtering for 51s, taking sputtering a layer of CoPt / BN as a cycle, and repeating sputtering for five cycles without changing the sputtering time, the structure can be obtained as [ CoPt (3nm) / BN (2.5nm)] 5 / Ag (10nm) / glass substrate multilayer film, described each layer thickness all is the value before vacuum sputtering sample or annealing. After the sample is annealed, the multilayer magnetic recording medium of [CoPt(3nm) / BN(2.5nm)]5 / Ag(10nm) / glass substrate of this embodiment can be obtained.

Embodiment 3

[0041] Embodiment 3: prepare [CoPt (3nm) / C (3nm)] 5 / Ag (0,5,10,30,50nm) / the multilayer film magnetic recording medium of glass substrate

[0042] According to the steps described in Example 1, where the Ag target sputtering time changes to 0s, 20s, 40s, 120s and 200s, a series of films with different thicknesses of the Ag bottom layer can be prepared respectively, and a series of [CoPt (3nm) Magnetic recording medium of / C(3nm)]5 / Ag(0, 5, 10, 30, 50nm) / glass substrate.

[0043] The thin film structure of present embodiment series has been characterized by X-ray diffractometer, because the intensity ratio I of CoPt (001) peak and (111) peak 001 / I 111 can be described as L1 0 - Figure of Merit for the degree of ordering of CoPt, Table 1 lists the L1 for different Ag layer thicknesses 0 -CoPt perpendicular magnetic recording media in X-ray diffraction I 001 / I 111 The value of and the grain size calculated according to the Scherrer formula, where CoPt (15nm) / substrate is th...

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
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides an ultra-high density vertical magnetic recording medium by a physical deposition method, i.e., a magnetron sputtering method, in which the recording medium uses L10-CoPt as a magnetic layer, includes a substrate, a base layer, and the magnetic layer, the magnetic layer is a multi-layer film on which CoPt and non-magnetic substance M are alternately deposited, wherein CoPt is equiatomic CoPt alloy, the non-magnetic substance M is carbon C or boron nitride BN. The method has a low manufacturing cost, products with small grain size, and the method can largely increase production efficiency thereby having a good industrialisation foreground.

Description

technical field [0001] The invention belongs to the field of information storage, in particular to a magnetic recording medium, in particular to a magnetic layer L1 0 -Ultra-high density perpendicular magnetic recording medium of CoPt alloy, and the preparation method of this kind of magnetic recording medium, technical background [0002] Magnetic recording is the core technology of information storage. With the development of the information age, the requirements and needs for magnetic recording are getting higher and higher, and increasing the density of magnetic recording is one of them. At present, the recording density of hard disks is increasing at a rate of 100% per year, and the recording method of the magnetic medium layer of commercial hard disks is mostly longitudinal magnetic recording. In order to further improve the recording density of magnetic recording media, the signal-to-noise ratio (SNR) must first be improved. and anisotropy constant (Ku). The noise o...

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): G11B5/66G11B5/70G11B5/73G11B5/84G11B5/851
Inventor 许小红王芳李小丽武海顺靳焘
Owner 山西师范大学
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com