JPS6467714A - Glass substrate for magnetic disk and manufacture thereof - Google Patents

Glass substrate for magnetic disk and manufacture thereof

Info

Publication number
JPS6467714A
JPS6467714A JP22403487A JP22403487A JPS6467714A JP S6467714 A JPS6467714 A JP S6467714A JP 22403487 A JP22403487 A JP 22403487A JP 22403487 A JP22403487 A JP 22403487A JP S6467714 A JPS6467714 A JP S6467714A
Authority
JP
Japan
Prior art keywords
rugged
manufacture
glass substrate
magnetic disk
projecting part
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
Application number
JP22403487A
Other languages
Japanese (ja)
Other versions
JP2737901B2 (en
Inventor
Atsushi Matsui
Takaaki Sera
Shun Kijima
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.)
AGC Inc
Original Assignee
Asahi Glass 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 Asahi Glass Co Ltd filed Critical Asahi Glass Co Ltd
Priority to JP62224034A priority Critical patent/JP2737901B2/en
Priority to EP87114663A priority patent/EP0263512B1/en
Priority to DE3789932T priority patent/DE3789932T2/en
Priority to US07/105,612 priority patent/US4833001A/en
Publication of JPS6467714A publication Critical patent/JPS6467714A/en
Priority to US07/329,993 priority patent/US5087481A/en
Application granted granted Critical
Publication of JP2737901B2 publication Critical patent/JP2737901B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Magnetic Record Carriers (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)

Abstract

PURPOSE:To improve a magnetic characteristic by forming a surface to be finely rugged and obtaining the rounded top of a projecting part on the rugged surface. CONSTITUTION:The surface to be rugged is formed by executing a chemical etching processing to a glass surface and next, a mechanical grinding processing is executed to this surface. Accordingly, the top of the projecting part is made rounded on the surface to be equally and finely rugged. Here, preferably the maximum height of the surface roughness due to the ruggedness is <=700Angstrom in a reference length 250mum and >=50Angstrom in the reference length 50mum. Thus, the magnetic characteristic of a CSS characteristic, a head stick property and an S/N, etc., are improved.
JP62224034A 1986-10-09 1987-09-09 Method for manufacturing glass substrate for magnetic disk Expired - Fee Related JP2737901B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP62224034A JP2737901B2 (en) 1987-09-09 1987-09-09 Method for manufacturing glass substrate for magnetic disk
EP87114663A EP0263512B1 (en) 1986-10-09 1987-10-07 Glass substrate for a magnetic disc and process for its production
DE3789932T DE3789932T2 (en) 1986-10-09 1987-10-07 Glass substrate for a magnetic disk and process for its manufacture.
US07/105,612 US4833001A (en) 1986-10-09 1987-10-08 Glass substrate for a magnetic disc and process for its production
US07/329,993 US5087481A (en) 1986-10-09 1989-03-29 Method for texturing a magnetic disk silicate glass substrate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62224034A JP2737901B2 (en) 1987-09-09 1987-09-09 Method for manufacturing glass substrate for magnetic disk

Publications (2)

Publication Number Publication Date
JPS6467714A true JPS6467714A (en) 1989-03-14
JP2737901B2 JP2737901B2 (en) 1998-04-08

Family

ID=16807555

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62224034A Expired - Fee Related JP2737901B2 (en) 1986-10-09 1987-09-09 Method for manufacturing glass substrate for magnetic disk

Country Status (1)

Country Link
JP (1) JP2737901B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02285515A (en) * 1989-04-27 1990-11-22 Hitachi Ltd Magnetic disk, its manufacturing method, its manufacturing device, and magnetic disk device
JPH03173917A (en) * 1989-11-30 1991-07-29 Victor Co Of Japan Ltd Magnetic recording medium and production thereof
JPH07240025A (en) * 1994-01-21 1995-09-12 Internatl Business Mach Corp <Ibm> Superpolishing method and slurry for it
WO1996030901A1 (en) * 1995-03-30 1996-10-03 Ag Technology Co., Ltd. Method of manufacturing glass substrate for magnetic disk
JPH08297834A (en) * 1996-04-26 1996-11-12 Hitachi Ltd Magnetic disk

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60136035A (en) * 1983-12-22 1985-07-19 Fujitsu Ltd Production of magnetic disc
JPS60229234A (en) * 1984-04-27 1985-11-14 Sumitomo Special Metals Co Ltd Substrate for magnetic disk and its production
JPS61278021A (en) * 1985-06-03 1986-12-08 Hitachi Ltd Underlying substrate for magnetic disks

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60136035A (en) * 1983-12-22 1985-07-19 Fujitsu Ltd Production of magnetic disc
JPS60229234A (en) * 1984-04-27 1985-11-14 Sumitomo Special Metals Co Ltd Substrate for magnetic disk and its production
JPS61278021A (en) * 1985-06-03 1986-12-08 Hitachi Ltd Underlying substrate for magnetic disks

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02285515A (en) * 1989-04-27 1990-11-22 Hitachi Ltd Magnetic disk, its manufacturing method, its manufacturing device, and magnetic disk device
JPH03173917A (en) * 1989-11-30 1991-07-29 Victor Co Of Japan Ltd Magnetic recording medium and production thereof
JPH07240025A (en) * 1994-01-21 1995-09-12 Internatl Business Mach Corp <Ibm> Superpolishing method and slurry for it
WO1996030901A1 (en) * 1995-03-30 1996-10-03 Ag Technology Co., Ltd. Method of manufacturing glass substrate for magnetic disk
US5871654A (en) * 1995-03-30 1999-02-16 Ag Technology Co., Ltd. Method for producing a glass substrate for a magnetic disk
JPH08297834A (en) * 1996-04-26 1996-11-12 Hitachi Ltd Magnetic disk

Also Published As

Publication number Publication date
JP2737901B2 (en) 1998-04-08

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees