Magnetic head device incorporating a ferroelectric thin film

Details Magnetic head device incorporating a ferroelectric thin film Magnetic head device incorporating a ferroelectric thin film

1996-12-12

1998-09-01

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

G11B 548

Patent

active

058019065

ABSTRACT:
A ferroelectric thin film (6) is formed on the surface of a support spring (4) for pressing a magnetic head (3) against a magnetic disc (1) so that the magnetic head (3) is in close contact with the magnetic disc (1). When the magnetic head (3) jumps out of the magnetic disc (1), electrostatic attractive force acts between the ferroelectric thin film (6) and the magnetic disc (1) to prevent the jumping of the magnetic head (3). Further, when the magnetic head (3) is excessively pressed against the magnetic disc (1), electrostatic repulsive force acts between the ferroelectric thin film (6) and the magnetic disc (1) to prevent the pressing force from increasing, thereby preventing the magnetic head (3) and the magnetic recording surface of the magnetic disc (1) from being worn or scratched.

REFERENCES:
patent: 5276573 (1994-01-01), Harada
H. Hamilton, "Contact Recording on Perpendicular Rigid Media", Journal of the Magnetics Society of Japan, vol. 15 Supplement, No. S2 (1991), pp. 483-490.

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