IP Library › Granted Patent US 12,080,322
Granted Patent B2
US 12,080,322 · App. 18/191,354 · Granted Sep 3, 2024

Magnetic tape, magnetic tape cartridge, and magnetic tape device

Inventor: Tetsuya Kaneko (Minamiashigara, JP)
Assignee: FUJIFILM Corporation
G11B23/107G11B5/588G11B5/78
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Quick Facts
Patent No.
US 12,080,322
App. No.
18/191,354
Granted
Sep 3, 2024
Kind
B2
Abstract

A magnetic tape including a timing-based servo pattern, in which the magnetic tape is used in a magnetic tape device in which a total number of data tracks is 8705 or more in conversion of a magnetic tape having a width of ½ inches, and ΔPNL of the timing-based servo pattern is 10.0% or less of a track pitch. A magnetic tape cartridge including the magnetic tape, and a magnetic tape device including a magnetic tape, in which a total number of data tracks is 8705 or more in conversion of a magnetic tape having a width of ½ inches, the magnetic tape includes a timing-based servo pattern, and ΔPNL of the timing-based servo pattern is 10.0% or less of a track pitch are provided. The ΔPNL indicates an amount of deviation of the timing-based servo pattern from linearity.

Claims (42)

1. A magnetic tape comprising:

a timing-based servo pattern,

wherein the magnetic tape is used in a magnetic tape device in which a total number of data tracks is 8705 or more in conversion of a magnetic tape having a width of ½ inches,

ΔPNL of the timing-based servo pattern is 10.0% or less of a track pitch, and

the ΔPNL indicates an amount of deviation of the timing-based servo pattern from linearity.

2. The magnetic tape according to claim 1 ,

wherein the total number of data tracks is 8960 or more.

3. The magnetic tape according to claim 1 ,

wherein the ΔPNL of the timing-based servo pattern is 0.5% to 10.0% of the track pitch.

4. The magnetic tape according to claim 2 ,

wherein the ΔPNL of the timing-based servo pattern is 0.5% to 10.0% of the track pitch.

5. The magnetic tape according to claim 1 , further comprising:

a non-magnetic support; and

a magnetic layer containing a ferromagnetic powder.

6. The magnetic tape according to claim 5 , further comprising:

a non-magnetic layer containing a non-magnetic powder between the non-magnetic support and the magnetic layer.

7. The magnetic tape according to claim 5 , further comprising:

a back coating layer containing a non-magnetic powder on a surface side of the non-magnetic support opposite to a surface side including the magnetic layer.

8. The magnetic tape according to claim 6 , further comprising:

a back coating layer containing a non-magnetic powder on a surface side of the non-magnetic support opposite to a surface side including the magnetic layer.

9. A magnetic tape cartridge comprising:

the magnetic tape according to claim 1 .

10. A magnetic tape device comprising:

a magnetic tape,

wherein a total number of data tracks is 8705 or more in conversion of a magnetic tape having a width of ½ inches,

the magnetic tape includes a timing-based servo pattern,

ΔPNL of the timing-based servo pattern is 10.0% or less of a track pitch, and

the ΔPNL indicates an amount of deviation of the timing-based servo pattern from linearity.

11. The magnetic tape device according to claim 10 ,

wherein the total number of data tracks is 8960 or more.

12. The magnetic tape device according to claim 10 ,

wherein the ΔPNL of the timing-based servo pattern is 0.5% to 10.0% of the track pitch.

13. The magnetic tape device according to claim 11 ,

wherein the ΔPNL of the timing-based servo pattern is 0.5% to 10.0% of the track pitch.

14. The magnetic tape device according to claim 10 ,

wherein the magnetic tape includes a non-magnetic support, and a magnetic layer containing a ferromagnetic powder.

15. The magnetic tape device according to claim 14 ,

wherein the magnetic tape further includes a non-magnetic layer containing a non-magnetic powder between the non-magnetic support and the magnetic layer.

16. The magnetic tape device according to claim 14 ,

wherein the magnetic tape further includes a back coating layer including a non-magnetic powder on a surface side of the non-magnetic support opposite to a surface side including the magnetic layer.

17. The magnetic tape device according to claim 15 ,

wherein the magnetic tape further includes a back coating layer including a non-magnetic powder on a surface side of the non-magnetic support opposite to a surface side including the magnetic layer.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 28, 2023
From: KANEKO, TETSUYA
To: FUJIFILM CORPORATION
Reel/Frame 063135/0193 →
Priority Claims (1)
JP 2020-165818 · Sep 30, 2020 · national
Continuity (2)
Continuation PCTJP2021034153 · Sep 16, 2021
Related Publication 20230238032A1 · Jul 27, 2023
Cited By (1)
US 12,518,793