Browse Prior Art Database

Improved Structural Suspension Arm for the REED Head

IP.com Disclosure Number: IPCOM000115676D
Original Publication Date: 1995-Jun-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 42K

Publishing Venue

IBM

Related People

Santini, H: AUTHOR

Abstract

The low mass REED head, for contact recording, has as its most important attributes the fabrication of the finished throat height, and the integral fabrication of the head and the suspension arm at the same time via thin film techniques.

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Improved Structural Suspension Arm for the REED Head

      The low mass REED head, for contact recording, has as its most
important attributes the fabrication of the finished throat height,
and the integral fabrication of the head and the suspension arm at
the same time via thin film techniques.

      The suspension arm preferred materials are sputtered Al2O3 for
the structural rectangular beam and electroplated Cu for the imbedded
leads.  The rectangular beam cross section, in its preferred
embodiment, is 40 by 600 um while its length is of 12.0 mm.

      In the contact recording application of this design the head
experiences increased friction, in the radial direction, while it is
seeking an appropriate track.  This friction causes torsion forces in
the flexure arm and by its rectangular cross section design it causes
tilting of the head and accordingly larger settling time before
attempting a write or read operation.

      By introducing small photo masking changes at the metalization
steps, more particular  to the Cu electroplating ones (leads and
contact pads), one could electrodeposit Cu to a thickness up to the
combined thickness of all the steps incorporated and of a width
dictated by the photomask.

      The preferred location  of these Cu structures is alongside the
edges of the suspension arm thus modifying the rectangular cross
section into U shaped beam.  It is intrinsic for this new cross
section to be of better structural stiffne...