Magnetic tape device and head tracking servo method
US-10438622-B2 · Oct 8, 2019 · US
Magnetic tape
US10878845B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10878845-B2 |
| Application number | US-201816009825-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 15, 2018 |
| Priority date | Jun 23, 2017 |
| Publication date | Dec 29, 2020 |
| Grant date | Dec 29, 2020 |
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Abstract
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The magnetic tape includes a non-magnetic support; a magnetic layer including ferromagnetic powder and a binding agent on one surface side of the non-magnetic support; and a back coating layer including non-magnetic powder and a binding agent on the other surface side of the non-magnetic support, in which a thickness of the back coating layer is equal to or smaller than 0.30 μm, and an isoelectric point of a surface zeta potential of the back coating layer is equal to or smaller than 3.0.
First claim
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What is claimed is: 1. A magnetic tape comprising: a non-magnetic support; a magnetic layer including ferromagnetic powder and a binding agent on one surface side of the non-magnetic support; and a back coating layer including non-magnetic powder and a binding agent on another surface side of the non-magnetic support, wherein the thickness of the back coating layer is equal to or smaller than 0.30 μm, and the isoelectric point of the surface zeta potential of the back coating layer is equal to or smaller than 3.0. 2. The magnetic tape according to claim 1 , wherein the isoelectric point is 1.5 to 3.0. 3. The magnetic tape according to claim 2 , wherein the binding agent of the back coating layer is a binding agent including an acidic group. 4. The magnetic tape according to claim 3 , wherein the acidic group includes at least one kind of acidic group selected from the group consisting of a sulfonic acid group and a salt thereof. 5. The magnetic tape according to claim 1 , wherein the binding agent of the back coating layer is a binding agent including an acidic group. 6. The magnetic tape according to claim 5 , wherein the acidic group includes at least one kind of acidic group selected from the group consisting of a sulfonic acid group and a salt thereof. 7. The magnetic tape according to claim 1 , further comprising: a non-magnetic layer including non-magnetic powder and a binding agent between the non-magnetic support and the magnetic layer. 8. The magnetic tape according to claim 1 , wherein the thickness of the back coating layer is 0.05 μm to 0.30 μm. 9. The magnetic tape according to claim 1 , wherein the isoelectric point is 1.5 to 2.7.
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- What does patent US10878845B2 cover?
- The magnetic tape includes a non-magnetic support; a magnetic layer including ferromagnetic powder and a binding agent on one surface side of the non-magnetic support; and a back coating layer including non-magnetic powder and a binding agent on the other surface side of the non-magnetic support, in which a thickness of the back coating layer is equal to or smaller than 0.30 μm, and an isoelect…
- Who is the assignee on this patent?
- Fujifilm Corp
- What technology area does this patent fall under?
- Primary CPC classification G11B5/702. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Dec 29 2020 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).