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Head-Gimbal Assembly with Dome-Lift Feature for Actuator Arm Rework

IP.com Disclosure Number: IPCOM000117233D
Original Publication Date: 1996-Jan-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 2 page(s) / 82K

Publishing Venue

IBM

Related People

Frater, N: AUTHOR [+3]

Abstract

A Head-Gimbal Assembly (HGA) is fabricated with two formed dome features in the base of the load beam or in the mount plate which protrude from the side of the load beam or mount plate in contact with the actuator arm. These dome features are positioned just outside of the nominal arm outline so that the protrusion does not interfere with the seating of the load beam and mount plate to the actuator arm. If rework is needed, the HGA can be easily removed from the actuator comb by rotating the HGA and engaging the dome features in interference with the arm tip. The dome interference produces a vertical force that lifts the HGA away from the arm tip enough to insert a prying tool to complete the HGA removal without damage to the fragile arm tip.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Head-Gimbal Assembly with Dome-Lift Feature for Actuator Arm Rework

      A Head-Gimbal Assembly (HGA) is fabricated with two formed dome
features in the base of the load beam or in the mount plate which
protrude from the side of the load beam or mount plate in contact
with the actuator arm.  These dome features are positioned just
outside of the nominal arm outline so that the protrusion does not
interfere with the seating of the load beam and mount plate to the
actuator arm.  If rework is needed, the HGA can be easily removed
from the actuator comb by rotating the HGA and engaging the dome
features in interference with the arm tip.  The dome interference
produces a vertical force that lifts the HGA away from the arm tip
enough to insert a prying tool to complete the HGA removal without
damage to the fragile arm tip.  In prior art, the HGA is removed by
inserting a knife-like prying tool into the interface between the HGA
and arm.  Since the HGA is swaged flush with the arm tip, the
insertion of the knife-like tool produces some scraping and burring
of the arm tip which creates possible contamination and damage to the
mounting surface for the replacement HGA.

      A Head-Gimbal Assembly is fabricated with formed domes in the
base area adjacent to the mount plate swage boss, but nominally lying
just outside of the actuator comb outline.  The dome features can be
fabricated from the load beam material or from the mount plate
material, which give differing amounts of stiffness and crushing
resistances.  The choice depends on the relative resistance of the
swage joint to being pushed out from the comb arm hole and th...