JPS62234232A - Magnetic disk substrate and its production - Google Patents
Magnetic disk substrate and its productionInfo
- Publication number
- JPS62234232A JPS62234232A JP61076512A JP7651286A JPS62234232A JP S62234232 A JPS62234232 A JP S62234232A JP 61076512 A JP61076512 A JP 61076512A JP 7651286 A JP7651286 A JP 7651286A JP S62234232 A JPS62234232 A JP S62234232A
- Authority
- JP
- Japan
- Prior art keywords
- disk
- resin
- phenol formaldehyde
- formaldehyde resin
- parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000758 substrate Substances 0.000 title abstract 4
- 229920005989 resin Polymers 0.000 abstract 4
- 239000011347 resin Substances 0.000 abstract 4
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 abstract 3
- 229920001568 phenolic resin Polymers 0.000 abstract 3
- OZAIFHULBGXAKX-UHFFFAOYSA-N precursor Substances N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 abstract 3
- 238000001354 calcination Methods 0.000 abstract 2
- 239000000945 filler Substances 0.000 abstract 2
- 150000001247 metal acetylides Chemical class 0.000 abstract 2
- 238000000465 moulding Methods 0.000 abstract 2
- 229920005992 thermoplastic resin Polymers 0.000 abstract 2
- 229920001187 thermosetting polymer Polymers 0.000 abstract 2
- 239000000654 additive Substances 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- 238000003763 carbonization Methods 0.000 abstract 1
- 238000010000 carbonizing Methods 0.000 abstract 1
- 229910021397 glassy carbon Inorganic materials 0.000 abstract 1
- 238000005498 polishing Methods 0.000 abstract 1
Abstract
PURPOSE: To obtain a disk substrate which substantially satisfies all the conditions necessary for the substrate by working a molded precursor formed by thermal molding of a prescribed resin to a disk, then carbonizing and calcining the disk and polishing the carbonized disk surface.
CONSTITUTION: The molded precursor is formed by thermal molding of a phenol formaldehyde resin and at least one kind selected from thermosetting resins except said resin and thermoplastic resins, carbides and inorg. fillers. After the precursor is worked to the disk, the disk is carbonized by carbonization and calcination. The surface of such disk is polished to obtain the magnetic disk substrate consisting of the glassy carbon. The mixing ratio of the additives to the phenol formaldehyde resin is 0W60 parts per 100 parts phenol formaldehyde resin in the case of the thermosetting resins, thermoplastic resin and carbides and is 0W40 parts in the case of the inorg. fillers.
COPYRIGHT: (C)1987,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61076512A JPS62234232A (en) | 1986-04-04 | 1986-04-04 | Magnetic disk substrate and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61076512A JPS62234232A (en) | 1986-04-04 | 1986-04-04 | Magnetic disk substrate and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62234232A true JPS62234232A (en) | 1987-10-14 |
Family
ID=13607316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61076512A Pending JPS62234232A (en) | 1986-04-04 | 1986-04-04 | Magnetic disk substrate and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62234232A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991006948A1 (en) * | 1989-10-27 | 1991-05-16 | Kabushiki Kaisha Kobe Seiko Sho | Method of producing magnetic recording medium |
| GB2242423A (en) * | 1990-03-29 | 1991-10-02 | Kobe Steel Ltd | Amorphous carbon substrate for magnetic discs |
| DE4430570A1 (en) * | 1993-08-30 | 1995-04-20 | Kobe Steel Ltd | Method of making a carbon substrate |
-
1986
- 1986-04-04 JP JP61076512A patent/JPS62234232A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991006948A1 (en) * | 1989-10-27 | 1991-05-16 | Kabushiki Kaisha Kobe Seiko Sho | Method of producing magnetic recording medium |
| GB2245599A (en) * | 1989-10-27 | 1992-01-08 | Kobe Steel Ltd | Method of producing magnetic recording medium |
| GB2245599B (en) * | 1989-10-27 | 1993-08-04 | Kobe Steel Ltd | Method of manufacturing a magnetic recording medium |
| US5252367A (en) * | 1989-10-27 | 1993-10-12 | Kabushiki Kaisha Kobe Seiko Sho | Method of manufacturing a magnetic recording medium |
| GB2242423A (en) * | 1990-03-29 | 1991-10-02 | Kobe Steel Ltd | Amorphous carbon substrate for magnetic discs |
| US5326607A (en) * | 1990-03-29 | 1994-07-05 | Kabushiki Kaisha Kobe Seiko Sho | Amorphous carbon substrate for a magnetic disk and a method of manufacturing the same |
| GB2242423B (en) * | 1990-03-29 | 1994-11-02 | Kobe Steel Ltd | Amorphous carbon substrate for a magnetic disk and a method of manufacturing the same |
| DE4430570A1 (en) * | 1993-08-30 | 1995-04-20 | Kobe Steel Ltd | Method of making a carbon substrate |
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