Floating magnetic head having improved static friction coefficie

Details Floating magnetic head having improved static friction coefficie Floating magnetic head having improved static friction coefficie

1989-06-01

1991-04-23

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

G11B 560

Patent

active

050104292

ABSTRACT:
A floating type magnetic head is made of a polycrystalline material. A surface to be opposed to a magnetic recording medium is undulated with lands and grooves having a height different of 50 to 200 .ANG. on an average and a repetition pitch of 5 to 20 microns on an average. The portions, in which the heights of the lands and the grooves abruptly change, extend along the boundaries of the polycrystals. The head surface opposed to the magnetic recording medium is sputter-etched to have the predetermined surface roughness.

REFERENCES:
patent: 4257076 (1981-03-01), Shimizu et al.
patent: 4660114 (1987-04-01), Yamakawa et al.
patent: 4796127 (1989-01-01), Wada et al.
patent: 4833556 (1989-05-01), Kosarko et al.
patent: 4851942 (1989-07-01), Kumasaka et al.
IBM Technical Disclosure Bulletin vol. 20, No. 8 Jan. 1978.

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