JP2021093238A5 - - Google Patents
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- JP2021093238A5 JP2021093238A5 JP2021038270A JP2021038270A JP2021093238A5 JP 2021093238 A5 JP2021093238 A5 JP 2021093238A5 JP 2021038270 A JP2021038270 A JP 2021038270A JP 2021038270 A JP2021038270 A JP 2021038270A JP 2021093238 A5 JP2021093238 A5 JP 2021093238A5
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- recording medium
- magnetic recording
- medium according
- less
- 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.)
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- 230000005291 magnetic effect Effects 0.000 claims 23
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims 6
- 238000005305 interferometry Methods 0.000 claims 2
- 239000006247 magnetic powder Substances 0.000 claims 2
- 230000003287 optical effect Effects 0.000 claims 2
- -1 polyethylene terephthalate Polymers 0.000 claims 2
- 238000005406 washing Methods 0.000 claims 2
- 239000004952 Polyamide Substances 0.000 claims 1
- 239000004962 Polyamide-imide Substances 0.000 claims 1
- 239000004760 aramid Substances 0.000 claims 1
- 229920003235 aromatic polyamide Polymers 0.000 claims 1
- 230000005294 ferromagnetic effect Effects 0.000 claims 1
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 claims 1
- 229920002647 polyamide Polymers 0.000 claims 1
- 229920002312 polyamide-imide Polymers 0.000 claims 1
- 239000011112 polyethylene naphthalate Substances 0.000 claims 1
- 229920000139 polyethylene terephthalate Polymers 0.000 claims 1
- 239000005020 polyethylene terephthalate Substances 0.000 claims 1
- 239000000843 powder Substances 0.000 claims 1
- 230000003746 surface roughness Effects 0.000 claims 1
Claims (7)
前記非磁性支持体は、ポリエチレンテレフタレート、ポリエチレンナフタレート、ポリアミド、ポリアミドイミドおよび芳香族ポリアミドからなる群から選択される１種以上を含み、
前記磁性層の表面において測定される中心線平均表面粗さＲａは１．０ｎｍ以上１．６ｎｍ以下であり、かつ
前記磁性層の表面においてメチルエチルケトン洗浄後に光学干渉法により測定されるスペーシングＳａｆｔｅｒと、前記磁性層の表面においてメチルエチルケトン洗浄前に光学干渉法により測定されるスペーシングＳｂｅｆｏｒｅとの差分、Ｓａｆｔｅｒ－Ｓｂｅｆｏｒｅ、は０ｎｍ超１５．０ｎｍ以下である磁気記録媒体。 A magnetic recording medium having a magnetic layer containing a ferromagnetic powder on a non-magnetic support.
The non-magnetic support comprises one or more selected from the group consisting of polyethylene terephthalate, polyethylene naphthalate, polyamide, polyamide-imide and aromatic polyamide.
The center line average surface roughness Ra measured on the surface of the magnetic layer is 1.0 nm or more and 1.6 nm or less, and the spacing Safter measured by the optical interferometry after washing the surface of the magnetic layer with methyl ethyl ketone. , A magnetic recording medium having a difference from the spacing S before measured by an optical interferometry on the surface of the magnetic layer before washing with methyl ethyl ketone, After -S before , which is more than 0 nm and 15.0 nm or less.
磁気ヘッドと、
を含む磁気記録再生装置。 The magnetic recording medium according to any one of claims 1 to 6 and the magnetic recording medium.
With a magnetic head
Magnetic recording / playback device including.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018064060 | 2018-03-29 | ||
| JP2018064060 | 2018-03-29 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2020190593A Division JP6852217B2 (en) | 2018-03-29 | 2020-11-17 | Magnetic recording medium and magnetic recording / playback device |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2021093238A JP2021093238A (en) | 2021-06-17 |
| JP2021093238A5 true JP2021093238A5 (en) | 2022-03-22 |
| JP7217766B2 JP7217766B2 (en) | 2023-02-03 |
Family
ID=68167087
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2019054750A Active JP6797231B2 (en) | 2018-03-29 | 2019-03-22 | Magnetic recording medium and magnetic recording / playback device |
| JP2020190593A Active JP6852217B2 (en) | 2018-03-29 | 2020-11-17 | Magnetic recording medium and magnetic recording / playback device |
| JP2021038270A Active JP7217766B2 (en) | 2018-03-29 | 2021-03-10 | Magnetic recording medium and magnetic recording/reproducing device |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2019054750A Active JP6797231B2 (en) | 2018-03-29 | 2019-03-22 | Magnetic recording medium and magnetic recording / playback device |
| JP2020190593A Active JP6852217B2 (en) | 2018-03-29 | 2020-11-17 | Magnetic recording medium and magnetic recording / playback device |
Country Status (1)
| Country | Link |
|---|---|
| JP (3) | JP6797231B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6812484B2 (en) * | 2018-03-29 | 2021-01-13 | 富士フイルム株式会社 | Magnetic recording medium and magnetic recording / playback device |
| JP7128147B2 (en) * | 2019-04-26 | 2022-08-30 | 富士フイルム株式会社 | Magnetic recording medium and magnetic recording/reproducing device |
| JP6788069B2 (en) * | 2019-05-15 | 2020-11-18 | 富士フイルム株式会社 | Magnetic recording medium and magnetic recording / playback device |
| JP6884257B2 (en) * | 2020-07-17 | 2021-06-09 | 富士フイルム株式会社 | Magnetic recording medium and magnetic recording / playback device |
| JP7287935B2 (en) | 2020-10-29 | 2023-06-06 | 富士フイルム株式会社 | Magnetic recording medium and magnetic recording/reproducing device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6334640B2 (en) * | 2015-09-30 | 2018-05-30 | 富士フイルム株式会社 | Magnetic tape and manufacturing method thereof |
| JP6465823B2 (en) * | 2016-02-03 | 2019-02-06 | 富士フイルム株式会社 | Magnetic tape and manufacturing method thereof |
| JP6427132B2 (en) * | 2016-03-23 | 2018-11-21 | 富士フイルム株式会社 | Magnetic tape and magnetic tape device |
| JP6498154B2 (en) * | 2016-06-23 | 2019-04-10 | 富士フイルム株式会社 | Magnetic tape and magnetic tape device |
| JP6797232B2 (en) * | 2018-03-29 | 2020-12-09 | 富士フイルム株式会社 | Magnetic tape and magnetic recording / playback device |
| JP6812485B2 (en) * | 2018-03-29 | 2021-01-13 | 富士フイルム株式会社 | Magnetic tape and magnetic recording / playback device |
| JP7003074B2 (en) * | 2019-01-31 | 2022-01-20 | 富士フイルム株式会社 | Magnetic tapes, magnetic tape cartridges and magnetic tape devices |
| JP7105211B2 (en) * | 2019-03-28 | 2022-07-22 | 富士フイルム株式会社 | Magnetic tapes, magnetic tape cartridges and magnetic recording/playback devices |
-
2019
- 2019-03-22 JP JP2019054750A patent/JP6797231B2/en active Active
-
2020
- 2020-11-17 JP JP2020190593A patent/JP6852217B2/en active Active
-
2021
- 2021-03-10 JP JP2021038270A patent/JP7217766B2/en active Active
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