JPS5532266A - Master disc for record - Google Patents
Master disc for recordInfo
- Publication number
- JPS5532266A JPS5532266A JP10465478A JP10465478A JPS5532266A JP S5532266 A JPS5532266 A JP S5532266A JP 10465478 A JP10465478 A JP 10465478A JP 10465478 A JP10465478 A JP 10465478A JP S5532266 A JPS5532266 A JP S5532266A
- Authority
- JP
- Japan
- Prior art keywords
- record
- plate
- alloy
- electrocast
- base body
- 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
Abstract
PURPOSE: To suppress the generation of a noise, etc., of a record due to deterioration in surface quality by making the surface tolerant of gas generated in heating dissolution of a record material by coating a stamper base body of an electrocast plate with a Ni-P alloy film by electroplating.
CONSTITUTION: An original disc base for a record made of an electrocast plate is connected to a cathode and a Ni plate is to an anode to carry out electroplating in a solution of pH 1.5, for example, of nickel sulfate and phosphorous acid, thereby forming a Ni-P alloy coating on the surface of the base body. In comparison with Cr plating, Ni-P alloy is deposited uniformly in consequence, so that a sound groove will be repoduced with fidelity with the improvement of corrosion resistance, resistance to wear, easiness to separate molds, etc.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10465478A JPS5532266A (en) | 1978-08-28 | 1978-08-28 | Master disc for record |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10465478A JPS5532266A (en) | 1978-08-28 | 1978-08-28 | Master disc for record |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5532266A true JPS5532266A (en) | 1980-03-06 |
Family
ID=14386440
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10465478A Pending JPS5532266A (en) | 1978-08-28 | 1978-08-28 | Master disc for record |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5532266A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5313580A (en) * | 1976-07-21 | 1978-02-07 | Maruho Hatsujiyou Kougiyou Kk | Surgical operational clip and opening or closing forceps therefor |
JPS5335502A (en) * | 1976-09-14 | 1978-04-03 | Sony Corp | Manufacture of original disk |
-
1978
- 1978-08-28 JP JP10465478A patent/JPS5532266A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5313580A (en) * | 1976-07-21 | 1978-02-07 | Maruho Hatsujiyou Kougiyou Kk | Surgical operational clip and opening or closing forceps therefor |
JPS5335502A (en) * | 1976-09-14 | 1978-04-03 | Sony Corp | Manufacture of original disk |
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