Perpendicular magnetic recording method

Details Perpendicular magnetic recording method Perpendicular magnetic recording method

1986-03-28

1987-02-24

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

Recording or reproducing plural information signals on the...

360 20, G11B 502

Patent

active

046461680

ABSTRACT:
A perpendicular magnetic recording method for recording two kinds of signals on a magnetic recording medium which has perpendicular magnetic anisotropy, recording the first kind of signal on the recording medium with a linear recording density higher than 30 kBPI, and then recording the second kind of signal on that recording track on which the first kind of signal has been recorded, with a linear recording density which is 15 or more kBPI lower than that of the previously-recorded signal, whereby two kinds of signals can be recorded on the same recording medium in such a way that they are superimposed on one another. These two kinds of signals are detected at the same time by one magnetic head and frequency-separated by a reproduced signals processing circuit which is provided with high and low pass filters.

REFERENCES:
patent: 3188615 (1965-06-01), Wilcox
patent: 3200207 (1965-08-01), Rainer et al.
patent: 3732364 (1973-05-01), Terada
patent: 3945035 (1976-03-01), Goldman
patent: 4313140 (1982-01-01), Keidl
patent: 4380779 (1983-04-01), Kitamura et al.
"Recording Servo Information Below a Data Surface in a Homogeneous Medium" by T. A. Schwartz, IBM TDB, vol. 17, #2, 7/74.
B. J. Langland and P. A. Albert, "Recording on Perpendicular Anisotropy Media with Ring Heads", IEEE Mag-17, 2547, Nov. 1981.

Affiliated with

Also associated with

Rating

Perpendicular magnetic recording method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Perpendicular magnetic recording method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Perpendicular magnetic recording method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-112916