Magnetic disk recording with variable track width and variable t

Details Magnetic disk recording with variable track width and variable t Magnetic disk recording with variable track width and variable t

1988-06-13

1990-07-31

McElheny, Jr., Donald

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 76, 360103, 360106, G11B 2121, G11B 2020

Patent

active

049454277

ABSTRACT:
A magnetic recording apparatus and method for the constant frequency recording of concentric data tracks on a magnetic recording disk in a manner to provide continuously reducing track width and continuously reducing track-to-track spacing from the disk's inner track to the disk's outer track. A magnetic recording head moves on a path from the disk's inner track to the disk's outer track. The head's gap-to-radius skew increases as the head moves from the inner track to the outer track. Thus, the gap's width-projection onto a disk radius at the location of each track continuously decreases in length, from the inner track to the outer track. As the track width progressively decreases, the track-to-track spacing also decreases, to thereby provide higher track density at the disk's outer tracks. A flying head having a parallelogram shaped slider is described, allowing use of the invention in non-contact recording.

REFERENCES:
patent: 3384880 (1968-05-01), Duinker et al.
patent: 3855625 (1974-12-01), Garnier et al.
patent: 4388655 (1983-06-01), Zenzefilis
patent: 4479156 (1984-10-01), Kumagai et al.
patent: 4486798 (1984-12-01), Feliss et al.
patent: 4633343 (1986-12-01), Maury et al.
J. S. Heath, Design of a Swinging Arm Actuator for a Disk File, IBM Journal of Research and Development, vol. 20, No. 4, pp. 389-397, Jul 1976.
IEEE Transactions on Magnetics, vol. Mag-22, No. 5, pp. 1028, 1029 & 1030, Sep. 1986, Entitled "A Uniform Flying Height Rotary Actuator Air Bearing Slider".

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