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

Substrate for magnetic information recording medium, and producing method of substrate for magnetic information recording medium

A technology for a magnetic recording medium and a manufacturing method, applied in the directions of magnetic recording, magnetic recording layer, base layer of recording layer, etc., can solve problems such as deformation, damage to magnetic recording medium, damage to glass substrate or aluminum substrate, etc.

Inactive Publication Date: 2007-03-07
KONICA MINOLTA OPTO
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In addition, when it is a portable small disk recording device such as 2.5 inches, 1 inch, or 0.85 inches, when the device is impacted, the magnetic recording medium is subject to large damage due to the impact on the magnetic recording medium body. The problem of breakage or deformation of the glass substrate or aluminum substrate occurs
In addition, in the manufacturing process of magnetic recording media, there is also the problem that the glass substrate is easily broken.
[0008] In addition, for a portable magnetic disk recording device, considering portability, it is desirable to have a light device, but since the aluminum substrate or glass substrate itself is heavy, it is difficult to achieve light weight when using an aluminum substrate or a glass substrate.

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
  • Substrate for magnetic information recording medium, and producing method of substrate for magnetic information recording medium
  • Substrate for magnetic information recording medium, and producing method of substrate for magnetic information recording medium
  • Substrate for magnetic information recording medium, and producing method of substrate for magnetic information recording medium

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0058] First, a substrate for a magnetic recording medium according to a first embodiment of the present invention will be described with reference to FIG. 1 . 1(a) to 1(c) are structural views of a substrate for a magnetic recording medium according to a first embodiment of the present invention, FIG. 1(a) is a perspective view of a substrate for a magnetic recording medium, and FIG. 1(b) and 1(c) is the I-I sectional view of Fig. 1(a).

[0059] As shown in the perspective view of FIG. 1( a ), the substrate 1 for magnetic recording media has a disc shape with a hole 1c formed in the center, and can be used as a substrate for magnetic recording media such as hard disks.

[0060] As shown in the cross-sectional view of FIG. 1( b ), a magnetic recording medium substrate 1 has a resin substrate 2 molded from a resin material into a disk shape, and a coating layer 3 a is formed on one surface of the resin substrate 2 . In this first embodiment, both surfaces of the resin substrat...

no. 2 Embodiment approach

[0102] Next, a substrate for a magnetic recording medium according to a second embodiment of the present invention will be described with reference to FIGS. 2( a ) to 2 ( b ). Fig. 2 is a cross-sectional view showing the structure of a substrate for a magnetic recording medium according to a second embodiment of the present invention.

[0103] As shown in Figure 2 (a), the substrate 5 for magnetic recording media related to the second embodiment has a resin substrate 2, an intermediate layer 6a is formed on one side surface of the resin substrate 2, and an intermediate layer 6a is formed on the intermediate layer 6a. Covering layer 3a. In the above-mentioned first embodiment, the covering layer 3a is provided directly on the resin substrate 2, but in the second embodiment, the intermediate layer 6a is provided between the resin substrate 2 and the covering layer 3a, which is a feature.

[0104] For the intermediate layer 6a, various resins can be used besides thermosetting re...

no. 3 Embodiment approach

[0120] Next, a magnetic recording medium substrate according to a third embodiment of the present invention will be described with reference to FIGS. 3( a ) to 3 ( b ). 3( a ) to 3 ( b ) are cross-sectional views showing the structure of a resin substrate in which the substrate for a magnetic recording medium according to the third embodiment of the present invention is used as a base material.

[0121] In the above-mentioned first and second embodiments, the surface of the resin substrate 2 is flat and horizontal, and the thickness of the resin substrate 2 is equal regardless of the central part or the peripheral part of the resin substrate. In the third embodiment, It is characteristic that the central part of the thickness of the resin substrate is different from that of the peripheral part.

[0122] As shown in the cross-sectional view of FIG. 3( a), in the resin substrate 8 according to the third embodiment, an opening 8c penetrating in the vertical direction is formed in...

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
surface roughnessaaaaaaaaaa
glass transition temperatureaaaaaaaaaa
surface roughnessaaaaaaaaaa
Login to View More

Abstract

The present invention provides a substrate for a magnetic information recording medium. The substrate for a magnetic information recording medium includes: a base plate in a disk shape comprising a resin material; and a covering layer formed on a surface of at least one side of the base plate.

Description

technical field [0001] The present invention relates to a substrate for a magnetic recording medium used as a substrate of a magnetic disk recording device and a method for manufacturing a substrate for a magnetic recording medium, and particularly relates to a substrate for a magnetic recording medium using a resin substrate. Background technique [0002] A magnetic disk recording device used in a computer or the like, such as a hard disk, uses a disk of aluminum alloy or glass as a substrate. A metal magnetic film is formed on the substrate, and the metal magnetic film is magnetized by a magnetic head to record information. [0003] In addition, a magnetic head for reading magnetically recorded information stored in a magnetic recording medium is configured to face the magnetic recording medium and move in a state of floating from the surface thereof. When there are irregularities on the surface of the magnetic recording medium, these irregularities collide with the magne...

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): G11B5/66G11B5/73G11B5/84B32B27/00
CPCG11B5/8404G11B5/82G11B5/7315G11B5/73925G11B5/739Y10S428/90
Inventor 中野智史小林肇正木义治河合秀树
Owner KONICA MINOLTA OPTO
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