JPS55125976A - Method for finishing base plate to mirror finished surface - Google Patents
Method for finishing base plate to mirror finished surfaceInfo
- Publication number
- JPS55125976A JPS55125976A JP3025279A JP3025279A JPS55125976A JP S55125976 A JPS55125976 A JP S55125976A JP 3025279 A JP3025279 A JP 3025279A JP 3025279 A JP3025279 A JP 3025279A JP S55125976 A JPS55125976 A JP S55125976A
- Authority
- JP
- Japan
- Prior art keywords
- grinding
- solution
- base plate
- finished surface
- mirror finished
- 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.)
- Granted
Links
Landscapes
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Manufacturing Of Magnetic Record Carriers (AREA)
- Thin Magnetic Films (AREA)
Abstract
PURPOSE:To finish the base plate of a magnetic disc to mirror finished surface, an extremely low roughness, by using special grinding solution. CONSTITUTION:The base plate 20 of a magnetic disc is seized under pressure between the magnetic cloths 27 and 28, and its both sides are ground at the same time to finish by rotating the grinding cloths 27 and 28 driven by the belts 33 and 34 with the colloidal silica solution 31 and 32 supplied as grinding solution through the grinding liquid supply pipes 29 and 30, which solution is a colloidal solution of ultra fine particles of silicin anhydride. In this grinding solution the silicic anhydride particles have an extremely small diameter in the range from about 0.01mum to about 0.02mum and are of round shape, giving no minute grinding scars under low pressure. It is possible to grind both sides of the base plate 20 to mirror finished surface with surface roughness, for example, below 0.005mum Rmax.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3025279A JPS55125976A (en) | 1979-03-15 | 1979-03-15 | Method for finishing base plate to mirror finished surface |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3025279A JPS55125976A (en) | 1979-03-15 | 1979-03-15 | Method for finishing base plate to mirror finished surface |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55125976A true JPS55125976A (en) | 1980-09-29 |
JPS6240140B2 JPS6240140B2 (en) | 1987-08-26 |
Family
ID=12298512
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3025279A Granted JPS55125976A (en) | 1979-03-15 | 1979-03-15 | Method for finishing base plate to mirror finished surface |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55125976A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57144654A (en) * | 1981-03-03 | 1982-09-07 | Nec Corp | Polishing method for high density magnetic disk substrate |
JPS6148123A (en) * | 1984-08-15 | 1986-03-08 | Sumitomo Special Metals Co Ltd | Substrate for magnetic disk and its production |
EP0664540A3 (en) * | 1994-01-21 | 1996-05-29 | Ibm | Substrate independent superpolishing process and slurry. |
CN115139191A (en) * | 2022-09-05 | 2022-10-04 | 歌尔光学科技有限公司 | Polishing method of optical lens mould core |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5380897A (en) * | 1976-12-27 | 1978-07-17 | Fujitsu Ltd | Method for grinding ferrite sintered bodies |
-
1979
- 1979-03-15 JP JP3025279A patent/JPS55125976A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5380897A (en) * | 1976-12-27 | 1978-07-17 | Fujitsu Ltd | Method for grinding ferrite sintered bodies |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57144654A (en) * | 1981-03-03 | 1982-09-07 | Nec Corp | Polishing method for high density magnetic disk substrate |
JPS6148123A (en) * | 1984-08-15 | 1986-03-08 | Sumitomo Special Metals Co Ltd | Substrate for magnetic disk and its production |
JPH0330209B2 (en) * | 1984-08-15 | 1991-04-26 | ||
EP0664540A3 (en) * | 1994-01-21 | 1996-05-29 | Ibm | Substrate independent superpolishing process and slurry. |
US6801396B1 (en) | 1994-01-21 | 2004-10-05 | Hitachi Global Storage Technologies Netherlands B.B. | Substrate independent superpolishing process and slurry |
CN115139191A (en) * | 2022-09-05 | 2022-10-04 | 歌尔光学科技有限公司 | Polishing method of optical lens mould core |
CN115139191B (en) * | 2022-09-05 | 2022-11-22 | 歌尔光学科技有限公司 | Polishing method of optical lens mould core |
Also Published As
Publication number | Publication date |
---|---|
JPS6240140B2 (en) | 1987-08-26 |
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