JPS5525821A - Magnetic memory substance - Google Patents

Magnetic memory substance

Info

Publication number
JPS5525821A
JPS5525821A JP9706578A JP9706578A JPS5525821A JP S5525821 A JPS5525821 A JP S5525821A JP 9706578 A JP9706578 A JP 9706578A JP 9706578 A JP9706578 A JP 9706578A JP S5525821 A JPS5525821 A JP S5525821A
Authority
JP
Japan
Prior art keywords
film
plated
oxide
finished
silane coupling
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
JP9706578A
Other languages
Japanese (ja)
Inventor
Masahiro Yanagisawa
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP9706578A priority Critical patent/JPS5525821A/en
Priority to DE2923682A priority patent/DE2923682C2/en
Priority to US06/047,916 priority patent/US4307156A/en
Publication of JPS5525821A publication Critical patent/JPS5525821A/en
Pending legal-status Critical Current

Links

Landscapes

  • Magnetic Record Carriers (AREA)

Abstract

PURPOSE: To secure the better protection for the metal magnetic thin film against the contact friction phenomenon as well as to increase the margin furthermore by eliminating the evil effect due to the unevenness caused when forming the formation process film by providing the specified protective film.
CONSTITUTION: Nonmagnetic metal layer 2 is plated on alloy disk 1 which is finished into the surface featuring a satisfactorily samll external waviness and then finished to a mirror surface. Then metal magnetic thin film medium 3 is plated on the mirror surface. Furthermore, nonmagnetic metal 4 composed of the Ni-P alloy is plated on medium 3 and then soaked into the acid solution containing the Cr oxide to form formation process film 5 composed of the Ni oxide and the Cr oxide. Then pre-process layer 6 containing the silane coupling agent, coat 7 composed of the inorganic high molecular compound containing the stress relaxing agent and through coating and drying of the poly-silicic acid containing the silane coupling agent and orientating lubricant 8 composed of alkoxysilane are provided on film 5. Thus the protective film is formed for magnetic disk 9.
COPYRIGHT: (C)1980,JPO&Japio
JP9706578A 1978-06-13 1978-08-08 Magnetic memory substance Pending JPS5525821A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP9706578A JPS5525821A (en) 1978-08-08 1978-08-08 Magnetic memory substance
DE2923682A DE2923682C2 (en) 1978-06-13 1979-06-12 Magnetic recording medium
US06/047,916 US4307156A (en) 1978-06-13 1979-06-12 Magnetic record member

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9706578A JPS5525821A (en) 1978-08-08 1978-08-08 Magnetic memory substance

Publications (1)

Publication Number Publication Date
JPS5525821A true JPS5525821A (en) 1980-02-23

Family

ID=14182236

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9706578A Pending JPS5525821A (en) 1978-06-13 1978-08-08 Magnetic memory substance

Country Status (1)

Country Link
JP (1) JPS5525821A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57164432A (en) * 1981-04-02 1982-10-09 Fuji Photo Film Co Ltd Magnetic recording medium
JPS57186230A (en) * 1981-05-13 1982-11-16 Matsushita Electric Ind Co Ltd Metallic thin film type magnetic recording medium and its manufacture
JPS6113425A (en) * 1984-06-29 1986-01-21 Nec Corp Magnetic recording medium and its production

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57164432A (en) * 1981-04-02 1982-10-09 Fuji Photo Film Co Ltd Magnetic recording medium
JPH0445889B2 (en) * 1981-04-02 1992-07-28 Fuji Photo Film Co Ltd
JPS57186230A (en) * 1981-05-13 1982-11-16 Matsushita Electric Ind Co Ltd Metallic thin film type magnetic recording medium and its manufacture
JPH0325848B2 (en) * 1981-05-13 1991-04-09 Matsushita Electric Ind Co Ltd
JPS6113425A (en) * 1984-06-29 1986-01-21 Nec Corp Magnetic recording medium and its production

Similar Documents

Publication Publication Date Title
JPS5584045A (en) Magnetic memory substance and its manufacture
JPS52122213A (en) Production of ferromagnetic metal powder
JPS5525821A (en) Magnetic memory substance
JPS5225603A (en) Magnetic tape
JPS57179948A (en) Magnetic recording medium
JPS5525822A (en) Magnetic memory substance
JPS54162508A (en) Magnetic memory medium
JPS57158036A (en) Magnetic storage body
JPS5758247A (en) Manufacture of vertical magnetic recording medium
JPS5654637A (en) Magnetic recording medium
JPS6020317A (en) Magnetic disc
JPS5583209A (en) Ferromagnetic powder and preparing the same
JPS57191831A (en) Metallic thin film type magnetic recording medium and its manufacture
JPS5342707A (en) Magnetic recording medium
JPS5570926A (en) Magnetic head of wear proof
JPS51131303A (en) Magnetic recording medium
JPS5584036A (en) Manufacture of magnetic recording medium
JPS5584035A (en) Manufacture of magnetic recording medium
JPS5251909A (en) Production of magnetic film
JPS5378807A (en) Magnetic recorder and preparation thereof
JPS55150134A (en) Magnetic disk
JPS5760536A (en) Magnetic recording medium
JPS537206A (en) Magnetic recording medium
JPS5584033A (en) Manufacture of magnetic recording medium
JPS52112306A (en) Magnetic recording tape