Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1994-07-22

1996-11-19

Dawson, Robert A.

Stock material or miscellaneous articles

All metal or with adjacent metals

Microscopic interfacial wave or roughness

428626, 428634, 428667, 428652, B32B 300

Patent

active

055761119

ABSTRACT:
A surface of a non-magnetic base plate is first coarsened to a required surface roughness and an ultrasonic vibration is then applied to the surface of the non-magnetic base plate while the nonmagnetic base plate is immersed in a liquid. Thereafter, a magnetic recording layer and a protective layer are successively formed on the surface of the non-magnetic base plate thereby to produce a magnetic recording medium. It is preferable that the frequency of a ultrasonic is within a range from 200 kHz to 1600 kHz. Surface fractional properties of the magnetic recording medium can adequately be controlled without variation of floatation height of a magnetic head during its running by varying an ultrasonic oscillation output and an ultrasonic processing time.

REFERENCES:
patent: 3297418 (1967-07-01), Firestone
patent: 4698251 (1987-10-01), Fukuda et al.
patent: 4816351 (1989-03-01), Takagi et al.
patent: 5061537 (1991-10-01), Kobayashi et al.
patent: 5080948 (1992-01-01), Morita et al.
patent: 5082709 (1992-01-01), Suzuki et al.
patent: 5094897 (1992-03-01), Morita et al.
patent: 5114778 (1992-05-01), Yanai et al.

Affiliated with

Also associated with

Rating

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

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-539681