Browse Prior Art Database

Low Shear Force Flexure

IP.com Disclosure Number: IPCOM000103807D
Original Publication Date: 1993-Feb-01
Included in the Prior Art Database: 2005-Mar-18
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Aoyagi, A: AUTHOR [+4]

Abstract

Disclosed is an improved design of flexures on suspension assemblies used in hard disk drives.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 93% of the total text.

Low Shear Force Flexure

      Disclosed is an improved design of flexures on suspension
assemblies used in hard disk drives.

      Generally slider 1 is made of ceramics material and flexure 2
is made of stainless steel.  The slider 1 is glued to the flexure 2
by means of adhesive as shown in Fig. 1.  In prior art, the portion
of flexure to which the slider is glued is flat plane.  Therefore,
when head suspension assemblies are heated, the slider crown
decreases because thermal expansion coefficient of the slider is
smaller than that of flexure.  If the temperature is too high, the
slider becomes negative crown.  This negative crown degrades the
head-disk durability performance of contact start stop too much.

      If thermal expansion coefficient of slider materiais is equal
to that of flexure material, deformation due to temperature change
never occurs.  But, it is hard to determine almost the same thermal
expansion coefficient material combination.

      New flexure design in Fig. 2 is shown here.  This flexure has a
very narrow and short tongue extending in all in-plane directions.
Thus, when heat is applied on a Head Suspension Assembly, the flexure
does not have strong enough shear force to change the slider crown so
much because of its shape.  This reduces slider deformation caused by
heating with conventional sliders and flexures combination.  As the
result, the head-disk durability performance at high temperature
improves owing to this l...