JPS5532266A - Master disc for record - Google Patents

Master disc for record

Info

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
Application number
JP10465478A
Other languages
Japanese (ja)
Inventor
Fumio Ito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Columbia Co Ltd
Original Assignee
Nippon Columbia Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Columbia Co Ltd filed Critical Nippon Columbia Co Ltd
Priority to JP10465478A priority Critical patent/JPS5532266A/en
Publication of JPS5532266A publication Critical patent/JPS5532266A/en
Pending legal-status Critical Current

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
JP10465478A 1978-08-28 1978-08-28 Master disc for record Pending JPS5532266A (en)

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)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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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