JPS6437718A - Production of substrate for magnetic disk - Google Patents

Production of substrate for magnetic disk

Info

Publication number
JPS6437718A
JPS6437718A JP19373187A JP19373187A JPS6437718A JP S6437718 A JPS6437718 A JP S6437718A JP 19373187 A JP19373187 A JP 19373187A JP 19373187 A JP19373187 A JP 19373187A JP S6437718 A JPS6437718 A JP S6437718A
Authority
JP
Japan
Prior art keywords
reference length
250mum
ruggedness
substrate
magnetic disk
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
JP19373187A
Other languages
Japanese (ja)
Other versions
JP2605292B2 (en
Inventor
Shun Kijima
Atsushi Matsui
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 JP19373187A priority Critical patent/JP2605292B2/en
Priority to DE3789932T priority patent/DE3789932T2/en
Priority to EP87114663A priority patent/EP0263512B1/en
Priority to US07/105,612 priority patent/US4833001A/en
Publication of JPS6437718A publication Critical patent/JPS6437718A/en
Priority to US07/329,993 priority patent/US5087481A/en
Application granted granted Critical
Publication of JP2605292B2 publication Critical patent/JP2605292B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To easily obtain the roughness required for a media by bringing a gaseous mixture contg. hydrogen fluoride in an inert gas into contact with a glass substrate kept in a specific temp. range. CONSTITUTION:The gaseous mixture contg. 0.01-10mol.% hydrogen fluoride in the inert gas is brought into contact with a glass stock plate kept in the 5-90 deg.C range, by which ruggedness is formed on the surface of the glass stock plate and the substrate for a magnetic disk is obtd. The max. height (Rmax) of the surface roughness consisting of ruggedness is required to be <=1,00Angstrom at 250mum reference length and >=50Angstrom at 50mum reference length; more preferably said height is maintained at <=700Angstrom at 250mum reference length and more preferably, <=400Angstrom at 250mum reference length. The easy formation of the fine ruggedness distributed uniformly without having directivity within the surface on the surface is thereby enabled and the performance required for the media is sufficiently satisfied.
JP19373187A 1986-10-09 1987-08-04 Method of manufacturing magnetic disk substrate Expired - Lifetime JP2605292B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP19373187A JP2605292B2 (en) 1987-08-04 1987-08-04 Method of manufacturing magnetic disk substrate
DE3789932T DE3789932T2 (en) 1986-10-09 1987-10-07 Glass substrate for a magnetic disk and process for its manufacture.
EP87114663A EP0263512B1 (en) 1986-10-09 1987-10-07 Glass substrate for a magnetic disc and process for its production
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
JP19373187A JP2605292B2 (en) 1987-08-04 1987-08-04 Method of manufacturing magnetic disk substrate

Publications (2)

Publication Number Publication Date
JPS6437718A true JPS6437718A (en) 1989-02-08
JP2605292B2 JP2605292B2 (en) 1997-04-30

Family

ID=16312871

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19373187A Expired - Lifetime JP2605292B2 (en) 1986-10-09 1987-08-04 Method of manufacturing magnetic disk substrate

Country Status (1)

Country Link
JP (1) JP2605292B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008156176A1 (en) * 2007-06-20 2008-12-24 Asahi Glass Company, Limited Method for treatment of surface of oxide glass with fluorinating agent
WO2012141311A1 (en) * 2011-04-15 2012-10-18 旭硝子株式会社 Anti-reflection glass substrate
WO2013171846A1 (en) * 2012-05-15 2013-11-21 三菱電機株式会社 Method for manufacturing glass substrate and method for manufacturing thin-film solar battery
WO2017073580A1 (en) * 2015-10-29 2017-05-04 旭硝子株式会社 Glass substrate for displays and method for producing glass substrate for displays
WO2018116779A1 (en) * 2016-12-21 2018-06-28 日本電気硝子株式会社 Device and method for producing glass substrate

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5359871B2 (en) * 2007-06-20 2013-12-04 旭硝子株式会社 Surface treatment method of oxide glass with fluorinating agent
WO2008156177A1 (en) * 2007-06-20 2008-12-24 Asahi Glass Company, Limited Method for treatment of surface of oxide glass
JPWO2008156177A1 (en) * 2007-06-20 2010-08-26 旭硝子株式会社 Oxide glass surface treatment method
JPWO2008156176A1 (en) * 2007-06-20 2010-08-26 旭硝子株式会社 Surface treatment method of oxide glass with fluorinating agent
WO2008156176A1 (en) * 2007-06-20 2008-12-24 Asahi Glass Company, Limited Method for treatment of surface of oxide glass with fluorinating agent
JP5343849B2 (en) * 2007-06-20 2013-11-13 旭硝子株式会社 Oxide glass surface treatment method
US8656735B2 (en) 2007-06-20 2014-02-25 Asahi Glass Company, Limited Method for treating surface of oxide glass with fluorinating agent
JP5962652B2 (en) * 2011-04-15 2016-08-03 旭硝子株式会社 Antireflection glass substrate and method for producing antireflection glass substrate
JPWO2012141311A1 (en) * 2011-04-15 2014-07-28 旭硝子株式会社 Anti-reflective glass substrate
WO2012141311A1 (en) * 2011-04-15 2012-10-18 旭硝子株式会社 Anti-reflection glass substrate
US9484473B2 (en) 2011-04-15 2016-11-01 Asahi Glass Company, Limited Anti-reflection glass substrate
WO2013171846A1 (en) * 2012-05-15 2013-11-21 三菱電機株式会社 Method for manufacturing glass substrate and method for manufacturing thin-film solar battery
WO2017073580A1 (en) * 2015-10-29 2017-05-04 旭硝子株式会社 Glass substrate for displays and method for producing glass substrate for displays
JPWO2017073580A1 (en) * 2015-10-29 2018-08-30 Ａｇｃ株式会社 GLASS SUBSTRATE FOR DISPLAY AND METHOD FOR PRODUCING GLASS SUBSTRATE FOR DISPLAY
TWI707833B (en) * 2015-10-29 2020-10-21 日商Ａｇｃ股份有限公司 Glass substrate for display and method for manufacturing glass substrate for display
WO2018116779A1 (en) * 2016-12-21 2018-06-28 日本電気硝子株式会社 Device and method for producing glass substrate
JP2018100203A (en) * 2016-12-21 2018-06-28 日本電気硝子株式会社 Manufacturing apparatus and manufacturing method of glass substrate
CN110088055A (en) * 2016-12-21 2019-08-02 日本电气硝子株式会社 The manufacturing device and manufacturing method of glass substrate
KR20190098997A (en) * 2016-12-21 2019-08-23 니폰 덴키 가라스 가부시키가이샤 Manufacturing apparatus and manufacturing method of glass substrate
TWI751242B (en) * 2016-12-21 2022-01-01 日商日本電氣硝子股份有限公司 Manufacturing device and manufacturing method of glass substrate

Also Published As

Publication number Publication date
JP2605292B2 (en) 1997-04-30

Similar Documents

Publication Publication Date Title
EP0413834A4 (en) Diamond-covered member and process for producing the same
JPS6486344A (en) Information recording carrier and production thereof
GR3002384T3 (en) High purity process for the preparation of 4,6-diamino-1,3-benzenediol
JPS6437718A (en) Production of substrate for magnetic disk
JPS56151495A (en) Production of l-glutamine through fermentation
EP0471845A4 (en) Method of forming oxide film
JPS6447019A (en) Glassy carbon coated susceptor
MY122506A (en) Method for pressing oxynitride glass, disk of oxynitride glass made by said method, and press-mold for said method
JPS56153558A (en) Floating head slider
ES8606497A1 (en) Process for preparing l-carnitine.
JPS6461263A (en) Electrode head
JPS6428376A (en) Production of silicon dioxide film containing boron
JPS6462484A (en) Method for flattening diamond film
JPS5737718A (en) Magnetic recording medium
JPS6482321A (en) Magnetic recording medium
JPS6419520A (en) Perpendicular magnetic recording medium and its production
JPS57150143A (en) Manufacture for magnetic recording medium
JPS5713650A (en) Electron tube vacuum exhaust dolly
JPS5321102A (en) Production of light hydrocarbon
JPS5346701A (en) Manufacture of reproducing stylus of diamond single crystal
JPS6421720A (en) Production of magnetic recording medium
JPS5783283A (en) Novel yeast
JPS5274329A (en) Production of stylus for video disc apparatus
JPS5270395A (en) Manufacturing process for resister for use in variable resister
JPS6478435A (en) Production of magnetic recording medium