Browse Prior Art Database

Circuitized Suspension Flexure: Foliage for Disk Drives

IP.com Disclosure Number: IPCOM000109137D
Original Publication Date: 1992-Jul-01
Included in the Prior Art Database: 2005-Mar-23
Document File: 1 page(s) / 36K

Publishing Venue

IBM

Related People

O'Hara, DJ: AUTHOR [+2]

Abstract

Disclosed is a composite flexure/cable (foliage) for read/write head assemblies that combines flexure for the air bearing slider gimbal and circuitry for signal processing in a structure more reliable and more suitable to automated assembly than previous designs.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Circuitized Suspension Flexure: Foliage for Disk Drives

      Disclosed is a composite flexure/cable (foliage) for read/write
head assemblies that combines flexure for the air bearing slider
gimbal and circuitry for signal processing in a structure more
reliable and more suitable to automated assembly than previous
designs.

      The composite replaces conventional structures comprising a
unique flexure and twisted pair wire routing.  One embodiment has a
stiff stainless steel base, an insulating and damping polyimide
layer, a conducting layer of printed copper, and a protective layer
of gold to facilitate termination and to prevent corrosion of the
copper.

      One advantage of this structure is the placement of the
circuits.  Because they do not make contact with the conductive
material of the slider, there is no risk of short circuits and thus
no need for a protective cover layer between these elements.
Furthermore, the circuits are located on the preferred side of the
foliage for termination to the arm cable solder pads.  Previous
designs required laser burn-in to expose the copper wires beneath the
cover layer at the termination pads.

      Disclosed anonymously.