JPS5750324A - Magnetic disc substrate - Google Patents
Magnetic disc substrateInfo
- Publication number
- JPS5750324A JPS5750324A JP55124682A JP12468280A JPS5750324A JP S5750324 A JPS5750324 A JP S5750324A JP 55124682 A JP55124682 A JP 55124682A JP 12468280 A JP12468280 A JP 12468280A JP S5750324 A JPS5750324 A JP S5750324A
- Authority
- JP
- Japan
- Prior art keywords
- substrate
- subjected
- heat treatment
- titanium oxide
- titanium nitride
- 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 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract 3
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 abstract 3
- 238000010438 heat treatment Methods 0.000 abstract 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 abstract 3
- 238000000034 method Methods 0.000 abstract 2
- 239000010409 thin film Substances 0.000 abstract 2
- 229910000838 Al alloy Inorganic materials 0.000 abstract 1
- 239000010408 film Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 230000003746 surface roughness Effects 0.000 abstract 1
- 239000010936 titanium Substances 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
- G11B5/733—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer characterised by the addition of non-magnetic particles
- G11B5/7334—Base layer characterised by composition or structure
Landscapes
- Magnetic Record Carriers (AREA)
- Physical Vapour Deposition (AREA)
Abstract
PURPOSE:To obtain a substrate which has a high surface hardness and a high surface precision and is adapted for production of a magnetic thin film disc for high- density recording, by providing a titanium nitride or titanium oxide layer on an Al substrate. CONSTITUTION:A titanium nitride or titanium oxide layer is formed on the surface of an Al substrate or an Al alloy plate by the method where titanium nitride or titanium oxide is stuck to this surface directly, the method where Ti is subjected to heat treatment in an atmospheric N2 or O2 at 300-1,000 deg.C after being vapor- deposited, etc. Next, the surface of the formed layer is polished chemically by approximately 1mu to give surface smoothness to surface roughness Rmax 0.02- 0.03mu. Since this polished substrate is not magnetized even if it is subjected to heat treatment at approximately 800-1,000 deg.C, it is subjected to heat treatment at 350 deg.C or less under the state where a magnetic film is caused to adhere onto the substrate. Thus, the substrate is obtained which has a high surface precision and a high surface hardness and is adapted for a thin film disc for high-density recording.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55124682A JPS5750324A (en) | 1980-09-10 | 1980-09-10 | Magnetic disc substrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55124682A JPS5750324A (en) | 1980-09-10 | 1980-09-10 | Magnetic disc substrate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5750324A true JPS5750324A (en) | 1982-03-24 |
Family
ID=14891457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55124682A Pending JPS5750324A (en) | 1980-09-10 | 1980-09-10 | Magnetic disc substrate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5750324A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5131995A (en) * | 1990-03-09 | 1992-07-21 | Nkk Corporation | Method of manufacturing titanium magnetic disk substrate |
| US5626920A (en) * | 1991-10-04 | 1997-05-06 | Tulip Memory Systems, Inc. | Method for coating metal disc substrates for magnetic-recording media |
| US5900126A (en) * | 1993-08-02 | 1999-05-04 | Tulip Memory Systems, Inc. | Method for manufacturing austenitic stainless steel substrate for magnetic-recording media |
-
1980
- 1980-09-10 JP JP55124682A patent/JPS5750324A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5131995A (en) * | 1990-03-09 | 1992-07-21 | Nkk Corporation | Method of manufacturing titanium magnetic disk substrate |
| US5626920A (en) * | 1991-10-04 | 1997-05-06 | Tulip Memory Systems, Inc. | Method for coating metal disc substrates for magnetic-recording media |
| US5811182A (en) * | 1991-10-04 | 1998-09-22 | Tulip Memory Systems, Inc. | Magnetic recording medium having a substrate and a titanium nitride underlayer |
| US6103367A (en) * | 1991-10-04 | 2000-08-15 | Tulip Memory Systems, Inc. | Coating of metal substrate for magnetic recording medium |
| US5900126A (en) * | 1993-08-02 | 1999-05-04 | Tulip Memory Systems, Inc. | Method for manufacturing austenitic stainless steel substrate for magnetic-recording media |
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