Claims
- 1. A magnetic recording/reproducing system comprising:
- a magnetic head member including a ring recording head having a magnetic gap length g and a recording track width Tw and a reproducing head having a reproducing track width Tr; and
- a rotatable magnetic recording disk having recording tracks recorded and reproduced by said magnetic head member,
- wherein said magnetic gap length g is expressed by the following inequalities:
- g<(1500/Hc-Hc/4000.pi.+0.3)/(Hc/400.pi.-1/2)
- and
- g>(1500/Hc-Hc/4000.pi.+0.3-Tp+Tw)/(Hc/400.pi.-1/2),
- where, Tp is a pitch of said recording tracks of said rotatable magnetic recording disk, and Hc is a coercive force of said magnetic recording disk,
- wherein g is selected in the stated range so that the ring recording head generates a side fringe magnetic field, which extends beyond said recording track width Tw, to erase a side-fringe erase region extending outside a selected recording track in said recording disk without erasing data on adjacent tracks of said selected recording track.
- 2. A system according to claim 1, wherein a>b and Tr<Tp+2a,
- where, 2a is equal to Tp-Tw, and 2b is equal to Tp-Tr.
- 3. A system according to claim 1, wherein Tr is larger than Tw and the reproducing track width Tr overlaps the side-fringe erase region.
- 4. The system of claim 3, wherein the side-fringe erase region has a maximum width of 0.21 .mu.m on each side of the reproducing track.
- 5. The system of claim 3, wherein the reproducing track width Tr is essentially 0.3 .mu.m greater than Tw.
- 6. The system of claim 3, wherein the reproducing track width Tr is essentially 0.4 .mu.m greater than Tw.
- 7. The system of claim 6, wherein the track pitch Tp is essentially 2.5 .mu.m.
- 8. The system of claim 3, wherein the recording track width Tw is 1.5 .mu.m and the reproducing track width Tr is 1.85 .mu.m.
- 9. The system of claim 3, wherein the reproducing track width Tr is 2.4 .mu.m and the recording track width is Tw 2.0 .mu.m.
- 10. A magnetic recording/reproducing system having recording tracks and a reproducing head with a reproducing track width Tr and a recording head with a recording track width Tw for recording/reproducing a signal with reference to a magnetic recording medium by means of a magnetic head which comprises:
- a ring recording head having a magnetic gap length g and a reproducing head;
- wherein said magnetic gap length g is expressed by the following inequalities:
- g<(1500/Hc-Hc/4000.pi.+0.3)/(Hc/400.pi.-1/2)
- and
- g>(1500/Hc-Hc/4000.pi.+0.3-Tp+Tw)/(Hc/400.pi.-1/2),
- where, Tp is a pitch of said recording tracks of said magnetic recording medium, and Hc is a coercive force of said magnetic recording medium,
- wherein g is selected in the stated range so that the ring recording head generates a side fringe magnetic field, which extends beyond said recording track width Tw, to erase a side-fringe erase region extending outside a selected recording track in said recording medium without erasing data on adjacent tracks of said selected recording track.
- 11. The system of claim 10, wherein Tr is larger than Tw and the reproducing track width Tr overlaps the side-fringe erase region.
- 12. The system of claim 11, wherein the side-fringe erase region has a maximum width of 0.21 .mu.m on each side of the reproducing track.
- 13. The system of claim 11, wherein the reproducing track width Tr is essentially 0.3 .mu.m greater than Tw.
- 14. The system of claim 11, wherein the reproducing track width Tr is essentially 0.4 .mu.m greater than Tw.
- 15. The system of claim 14, wherein the track pitch Tp is essentially 2.5 .mu.m.
- 16. The system of claim 11, wherein the recording track width Tw is 1.5 .mu.m and the reproducing track width Tr is 1.85 .mu.m.
- 17. The system of claim 11, wherein the reproducing track width Tr is 2.4 .mu.m and the recording track width is Tw 2.0 .mu.m.
- 18. A magnetic recording/reproducing method comprising the steps of:
- recording a signal by a ring recording head having a magnetic gap length g on recording tracks of a recording disk, having a recording track width Tw, wherein said recording tracks have a track pitch Tp and said recording disk has a coercive force Hc; and
- reproducing the signal from the recording disk,
- wherein the track pitch Tp and the recording track width having a relationship of the following inequalities:
- g<(1500/Hc-Hc/4000.pi.+0.3)/(Hc/400.pi.-1/2)
- and
- g>(1500/Hc-Hc/4000.pi.+0.3-Tp+Tw)/(Hc/400.pi.-1/2),
- wherein g is selected in the stated range so that the ring recording head generates a side-fringe magnetic field, which extends beyond said recording track width Tw, to erase a side-fringe erase region extending outside a selected recording track in said recording medium without erasing data on adjacent tracks of said selected recording track.
Priority Claims (2)
Number |
Date |
Country |
Kind |
5-050298 |
Mar 1993 |
JPX |
|
5-162922 |
Jun 1993 |
JPX |
|
Parent Case Info
This application is a Continuation of application Ser. No. 08/097,024, filed on Jul. 27, 1993, now abandoned.
US Referenced Citations (4)
Foreign Referenced Citations (1)
Number |
Date |
Country |
0521442 |
Jan 1993 |
EPX |
Continuations (1)
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Number |
Date |
Country |
Parent |
097024 |
Jul 1993 |
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