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Browse Prior Art Database

Damped Mount Plate For A Head Gimbal Assembly

IP.com Disclosure Number: IPCOM000123592D
Original Publication Date: 1999-Jan-01
Included in the Prior Art Database: 2005-Apr-05
Document File: 1 page(s) / 54K

Publishing Venue

IBM

Related People

Pan, TS: AUTHOR [+2]

Abstract

A mount plate design for a head gimbal assembly (HGA) is disclosed which incorporates high-loss modulus damping material for reducing the amplitude of unwanted structural vibrations in a hard disk drive (HDD) actuator assemblies. The damping material does not add to the z-height of the HGA, will not creep, and is encapsulated to prevent outgassing.

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Damped Mount Plate For A Head Gimbal Assembly

   A mount plate design for a head gimbal assembly (HGA) is
disclosed which incorporates high-loss modulus damping material for
reducing the amplitude of unwanted structural vibrations in a hard
disk drive (HDD) actuator assemblies.  The damping material does not
add to the z-height of the HGA, will not creep, and is encapsulated
to prevent outgassing.

   Referring to the attached drawing, a suspension load beam
1 is secured to a mount plate 2 with adhesive (not shown), spot
welds 7, or other suitable means.  The mount plate 2 has cavities 3
formed on one side.  Cavities 3 may be formed by etching, coining,
machining, casting, or other means.  The mount plate 2 may also
contain a swage spud 4 to facilitate attachment of the HGA to the
actuator arm, or it can be adhesive attached or spot welded without a
swage spud.  A high-loss elastomer damping material 5, such as
manufactured by the 3M Company, is placed in the cavities 3 prior to
attaching the mount plate 2 to the load beam 1.  The damping material
5 can be cast into the cavities 3 in liquid form or stamped from a
dry film to form a "decal" which is then inserted into the cavities 3
before attachment to the load beam 1.  Another variation is to form
cavities 3 on both faces of the mount plate 2, and fill all cavities
with damping material 5.  In this case, the mount plate 2 is attached
to the opposite side of the load beam 1 as shown in the drawing and
encapsulated...