Disk drive with secondary VCM actuator

Details Disk drive with secondary VCM actuator Disk drive with secondary VCM actuator

1997-12-12

1999-08-10

Ometz, David L.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

360109, G11B 555, G11B 556

Patent

active

059368055

ABSTRACT:
An active mount plate having a secondary electromagnetic (voice coil motor, VCM) actuator controls the fine positioning of a magnetic read/write head relative to a magnetic disk. The active mount plate is a laminate structure comprising spring layer(s) and magnet-carrier layer(s). A spring connects a fixed part controlled by a primary VCM to a movable part for mounting top and bottom suspensions and slider/head assemblies. In one embodiment, a coil mounted on a steel coil carrier is sandwiched between permanent magnets mounted on polycarbonate spring supports. The permanent magnets are fixed, while the coil is attached to the movable part. In another embodiment, a movable permanent magnet mounted on a spring is sandwiched between top and bottom fixed coils. The centers of mass of the suspension/slider/head assemblies coincide with the attachment points of the suspensions, such that the primary and secondary actuators act independently. The laminate layers can be easily made by extrusion, molding or die-cutting.

REFERENCES:
patent: 4814908 (1989-03-01), Schmitz
patent: 5177652 (1993-01-01), Yamaguchi et al.
patent: 5189578 (1993-02-01), Mori et al.
patent: 5216559 (1993-06-01), Springer
patent: 5303105 (1994-04-01), Jorgenson
patent: 5521778 (1996-05-01), Boutaghou et al.
patent: 5657188 (1997-08-01), Jurgenson et al.
patent: 5745319 (1998-04-01), Takekado et al.
patent: 5781381 (1998-07-01), Koganezawa et al.
patent: 5796558 (1998-08-01), Hanraham et al.
Koshida, S.; Head Access Mechanism; IBM Technical Disclosure Bulletin; vol. 31; No. 2; Jul. 1988; pp. 220-221.
Koganezawa, S. et al.; A Flexural Piggyback Milli-Actuator for Over 5 Gbit/in.2 Density Magnetic Recording; IEEE Trans. Magn..; vol. 32; pp. 3908-3910; 1996.
Tang et al, IEEE Trans. on Magnetics, "Silicon Micromachined Electromagnetic Microactuators . . . ", vol. 31, No. 6, pp. 2964-2966, Nov. 1995.

Affiliated with

Also associated with

Rating

Disk drive with secondary VCM actuator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Disk drive with secondary VCM actuator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Disk drive with secondary VCM actuator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1125986