Magnetic tape
US-10026430-B2 · Jul 17, 2018 · US
Magnetic tape device and magnetic reproducing method
US2018182428A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2018182428-A1 |
| Application number | US-201715854409-A |
| Country | US |
| Kind code | A1 |
| Filing date | Dec 26, 2017 |
| Priority date | Dec 27, 2016 |
| Publication date | Jun 28, 2018 |
| Grant date | — |
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- Title
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Abstract
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The magnetic tape device includes: a magnetic tape; and a reproducing head, in which a magnetic tape transportation speed of the magnetic tape device is equal to or lower than 18 m/sec, the reproducing head is a magnetic head including a tunnel magnetoresistance effect type element as a reproducing element, the magnetic tape includes a non-magnetic support, and a magnetic layer including ferromagnetic powder and a binding agent on the non-magnetic support, and a coefficient of friction measured regarding a base portion of a surface of the magnetic layer is equal to or smaller than 0.30.
First claim
Opening claim text (preview).
What is claimed is: 1 . A magnetic tape device comprising: a magnetic tape; and a reproducing head, wherein a magnetic tape transportation speed of the magnetic tape device is equal to or lower than 18 m/sec, the reproducing head is a magnetic head including a tunnel magnetoresistance effect type element as a reproducing element, the magnetic tape includes a non-magnetic support, and a magnetic layer including ferromagnetic powder and a binding agent on the non-magnetic support, and a coefficient of friction measured regarding a base portion of a surface of the magnetic layer is equal to or smaller than 0.30. 2 . The magnetic tape device according to claim 1 , wherein the coefficient of friction measured regarding the base portion of the surface of the magnetic layer is 0.20 to 0.30. 3 . The magnetic tape device according to claim 1 , wherein a center line average surface roughness Ra measured regarding a surface of the magnetic layer is equal to or smaller than 2.8 nm. 4 . The magnetic tape device according to claim 3 , wherein the center line average surface roughness Ra is equal to or smaller than 2.5 nm. 5 . The magnetic tape device according to claim 1 , wherein the magnetic tape includes a non-magnetic layer including non-magnetic powder and a binding agent between the non-magnetic support and the magnetic layer, and a total thickness of the magnetic layer and the non-magnetic layer is equal to or smaller than 1.8 μm. 6 . The magnetic tape device according to claim 5 , wherein the total thickness of the magnetic layer and the non-magnetic layer is equal to or smaller than 1.1 μm. 7 . A magnetic reproducing method comprising: reproducing information recorded on a magnetic tape by a reproducing head, wherein a magnetic tape transportation speed during the reproducing is equal to or lower than 18 m/sec, the reproducing head is a magnetic head including a tunnel magnetoresistance effect type element as a reproducing element, the magnetic tape includes a non-magnetic support, and a magnetic layer including ferromagnetic powder and a binding agent on the non-magnetic support, and a coefficient of friction measured regarding a base portion of a surface of the magnetic layer is equal to or smaller than 0.30. 8 . The magnetic reproducing method according to claim 7 , wherein the coefficient of friction measured regarding the base portion of the surface of the magnetic layer is 0.20 to 0.30. 9 . The magnetic reproducing method according to claim 7 , wherein a center line average surface roughness Ra measured regarding a surface of the magnetic layer is equal to or smaller than 2.8 nm. 10 . The magnetic reproducing method according to claim 9 , wherein the center line average surface roughness Ra is equal to or smaller than 2.5 nm. 11 . The magnetic reproducing method according to claim 7 , wherein the magnetic tape includes a non-magnetic layer including non-magnetic powder and a binding agent between the non-magnetic support and the magnetic layer, and a total thickness of the magnetic layer and the non-magnetic layer is equal to or smaller than 1.8 μm. 12 . The magnetic reproducing method according to claim 11 , wherein the total thickness of the magnetic layer and the non-magnetic layer is equal to or smaller than 1.1 μm.
Assignees
Inventors
Classifications
- G11B5/3909Primary
Arrangements using a magnetic tunnel junction · CPC title
characterised by addition of non-magnetic particles to the layer · CPC title
- G11B15/18Primary
Driving; Starting; Stopping; Arrangements for control or regulation thereof {(G11B15/56 takes precedence)} · CPC title
Tape carriers · CPC title
on a base layer · CPC title
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Frequently asked questions
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- What does patent US2018182428A1 cover?
- The magnetic tape device includes: a magnetic tape; and a reproducing head, in which a magnetic tape transportation speed of the magnetic tape device is equal to or lower than 18 m/sec, the reproducing head is a magnetic head including a tunnel magnetoresistance effect type element as a reproducing element, the magnetic tape includes a non-magnetic support, and a magnetic layer including ferrom…
- Who is the assignee on this patent?
- Fujifilm Corp
- What technology area does this patent fall under?
- Primary CPC classification G11B5/3909. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Thu Jun 28 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).