Method and apparatus for controlling the flying height of the he

Details Method and apparatus for controlling the flying height of the he Method and apparatus for controlling the flying height of the he

1987-11-23

1989-08-01

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

G11B 560, G11B 1562, G11B 1732

Patent

active

048538108

ABSTRACT:
The method involves the steps of moving the magnetic head (8) to within aerodynamic distance from the electrically conductive surface (16) of rotating magnetic recording disk, further positioning of the head (8) until a tunnel current occurs across the gap between the head (8) and surface (16), and maintaining said tunnel current constant by using the deviations of the current from a predetermined value corresponding to a certain flying height.
The apparatus comprises a tunnel electrode (9) forming an integral part of the head assembly which is attached to a distance control mechanism (5) permitting the positioning of the head assembly with a one-nanometer accuracy. The tunnel electrode (9) has a very slightly beveled shoulder (45, 47) ensuring early detection of asperities approaching the head. Gradation of the potential between tunnel electrode (9) and surface (16) of the recording disk (3) is used to enhance the response to asperities.

REFERENCES:
patent: 4343993 (1982-08-01), Binnig et al.
patent: 4479090 (1984-10-01), Frater et al.
patent: 4572822 (1986-03-01), Quate
patent: 4605977 (1986-08-01), Mathews
"Electrostatically Loaded Slider Bearing" by Lin et al., IBM/TDB, vol. 12, No. 7, Dec. 1969, p. 959.
"Capacitance Probe and Constant Q Circuit * * *", by Cupp, IBM/TDB, vol. 22, No. 1, Jun. 1979, p. 319-320.
"Piezoelectric XY Translator", by Bednorz et al., IBM/TDB, vol. 26, No. 10A, Mar. 1984, p. 4898-4899.
"Tunneling Through a Controllable Vacuum Gap", by Binnig et al., Appl. Phys. Lett., vol. 4D, No. 2 (Jan. 15, 1982), p. 178-180.

Affiliated with

Also associated with

Rating

Method and apparatus for controlling the flying height of the he does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for controlling the flying height of the he, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for controlling the flying height of the he will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-135959