Browse Prior Art Database

Material and Process for Bonding Low-Profile Head Suspension Assemblies to Comb Arms

IP.com Disclosure Number: IPCOM000117479D
Original Publication Date: 1996-Mar-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 4 page(s) / 90K

Publishing Venue

IBM

Related People

Kuczynski, JP: AUTHOR

Abstract

Disclosed are cyanoacrylate adhesives used to bond head suspension assemblies to comb arms in low-profile disk drives, enabling tight disk-to-disk spacing, ease of manufacture, and reworkability.

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

Material and Process for Bonding Low-Profile Head Suspension Assemblies
to Comb Arms

      Disclosed are cyanoacrylate adhesives used to bond head
suspension assemblies to comb arms in low-profile disk drives,
enabling tight disk-to-disk spacing, ease of manufacture, and
reworkability.

      Head suspension assemblies are fixtured to the comb arm and
held in place with locating keys.  XY alignment of the suspension to
the comb is accomplished by providing a circular tooling hole in the
load beam.  A tooling pin is engaged and the head end of the load
beam is rotated and butted up against a locating fixture.  A low
viscosity (<= 200 cP) cyanoacrylate adhesive is dispensed along the
mating surface of the comb and load beam (Fig. 1).

      The adhesive wicks under the load beam and, within seconds,
the load beam is securely adhered to the comb arm.  The strength of
the bond exceeds the tensile strength of the load beam when pulled in
shear (Table).
  Table.  SHEAR BOND FORCE OF CA4-BONDED SUSPENSIONS TO COMB ARMS
        SAMPLE ID      FORCE      FAILURE INTERFACE
                       (Lbs)
        Ambient-1       >46       Load beam failure
               -2       >31       Load beam failure
               -3       >48       Load beam failure
         150C  -1        *        Cohesive failure in the CA4 bond
               -2        *        Cohesive failure in the CA4 bond
               -3        *        Cohesive failure in the CA4 bond
  Note: * Samples were heated to 150 degrees...