MY169221A - Glass for magnetic recording medium substrate, glass substrate for magnetic recording medium, and their use - Google Patents
Glass for magnetic recording medium substrate, glass substrate for magnetic recording medium, and their useInfo
- Publication number
- MY169221A MY169221A MYPI2014702850A MYPI2014702850A MY169221A MY 169221 A MY169221 A MY 169221A MY PI2014702850 A MYPI2014702850 A MY PI2014702850A MY PI2014702850 A MYPI2014702850 A MY PI2014702850A MY 169221 A MY169221 A MY 169221A
- Authority
- MY
- Malaysia
- Prior art keywords
- recording medium
- magnetic recording
- glass
- cao
- substrate
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
- G11B5/8404—Processes or apparatus specially adapted for manufacturing record carriers manufacturing base layers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
- G11B5/739—Magnetic recording media substrates
- G11B5/73911—Inorganic substrates
- G11B5/73921—Glass or ceramic substrates
Abstract
An aspect of the present invention relates to glass for a magnetic recording medium substrate, which comprises essential components in the form of Si02, LhO, Na2O, and one or more alkaline earth metal oxides selected from the group consisting of MgO, CaO, SrO, and BaO wherein a molar ratio of a content of CaO to a combined content ofMgO, CaO, SrO, and BaO (CaO/(MgO + CaO + SrO + BaO)) is equal to or less than 0.20, and which has a glass transition temperature of equal to or higher than 650?C. Figure 5.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012076309 | 2012-03-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
MY169221A true MY169221A (en) | 2019-03-19 |
Family
ID=49259521
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
MYPI2014702850A MY169221A (en) | 2012-03-29 | 2013-03-13 | Glass for magnetic recording medium substrate, glass substrate for magnetic recording medium, and their use |
Country Status (5)
Country | Link |
---|---|
JP (1) | JP6042875B2 (en) |
CN (1) | CN104246883B (en) |
MY (1) | MY169221A (en) |
SG (1) | SG11201406177YA (en) |
WO (1) | WO2013146256A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SG10201605515PA (en) * | 2012-05-16 | 2016-09-29 | Hoya Corp | Glass for magnetic recording medium substrate and usage thereof |
JP6131154B2 (en) * | 2013-09-11 | 2017-05-17 | Hoya株式会社 | Glass for magnetic recording medium substrate and magnetic recording medium substrate |
JP2020534238A (en) * | 2017-09-21 | 2020-11-26 | コーニング インコーポレイテッド | Transparent, ion-exchangeable silicate glass with high fracture toughness |
JP7134397B2 (en) * | 2018-02-28 | 2022-09-12 | 日本電気硝子株式会社 | tempered glass and tempered glass |
CN116023025A (en) * | 2023-01-19 | 2023-04-28 | 清远南玻节能新材料有限公司 | Aluminoborosilicate glass for ion exchange, preparation method and application thereof |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10226532A (en) * | 1995-12-28 | 1998-08-25 | Yamamura Glass Co Ltd | Glass composition for magnetic disk substrate and magnetic disk substrate |
US5972460A (en) * | 1996-12-26 | 1999-10-26 | Hoya Corporation | Information recording medium |
JP3412804B2 (en) * | 1996-12-26 | 2003-06-03 | Hoya株式会社 | Information recording medium substrate |
JP4161509B2 (en) * | 1999-04-13 | 2008-10-08 | 旭硝子株式会社 | Glass for information recording medium substrate and glass substrate for information recording medium |
JP4017466B2 (en) * | 2001-12-04 | 2007-12-05 | 岡本硝子株式会社 | Heat resistant glass |
JP3897170B2 (en) * | 2002-01-21 | 2007-03-22 | 日本板硝子株式会社 | Infrared emitter and optical amplification medium |
JP4446683B2 (en) * | 2002-05-24 | 2010-04-07 | Hoya株式会社 | Glass substrate for magnetic recording media |
AU2003241745A1 (en) * | 2002-06-03 | 2003-12-19 | Hoya Corporation | Substrate for information recording medium, information recording medium and process for producing the same |
JP4726400B2 (en) * | 2003-05-29 | 2011-07-20 | コニカミノルタオプト株式会社 | Manufacturing method of glass substrate |
US8871368B2 (en) * | 2008-09-16 | 2014-10-28 | Wd Media (Singapore) Pte. Ltd. | Perpendicular magnetic recording medium and process for manufacture thereof |
JP5699434B2 (en) * | 2009-04-02 | 2015-04-08 | 旭硝子株式会社 | Glass for information recording medium substrate, glass substrate for information recording medium and magnetic disk |
EP2465828A4 (en) * | 2009-08-10 | 2014-03-26 | Hoya Corp | Glass for magnetic recording medium substrate, magnetic recording medium substrate and method for producing same, and magnetic recording medium |
JP5330307B2 (en) * | 2010-03-31 | 2013-10-30 | Hoya株式会社 | Manufacturing method of glass blank, manufacturing method of magnetic recording medium substrate, and manufacturing method of magnetic recording medium |
JP5528907B2 (en) * | 2010-05-31 | 2014-06-25 | Hoya株式会社 | Glass substrate for heat-assisted recording medium |
WO2012001914A1 (en) * | 2010-06-30 | 2012-01-05 | コニカミノルタオプト株式会社 | Glass substrate for information recording medium |
-
2013
- 2013-03-13 JP JP2014507641A patent/JP6042875B2/en active Active
- 2013-03-13 MY MYPI2014702850A patent/MY169221A/en unknown
- 2013-03-13 WO PCT/JP2013/056966 patent/WO2013146256A1/en active Application Filing
- 2013-03-13 SG SG11201406177YA patent/SG11201406177YA/en unknown
- 2013-03-13 CN CN201380015658.3A patent/CN104246883B/en active Active
Also Published As
Publication number | Publication date |
---|---|
JP6042875B2 (en) | 2016-12-14 |
JPWO2013146256A1 (en) | 2015-12-10 |
CN104246883B (en) | 2018-10-23 |
CN104246883A (en) | 2014-12-24 |
WO2013146256A1 (en) | 2013-10-03 |
SG11201406177YA (en) | 2014-11-27 |
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