Browse Prior Art Database

Protecting All The Traces By Turning The Flexure Upside Down

IP.com Disclosure Number: IPCOM000123662D
Original Publication Date: 1999-Mar-01
Included in the Prior Art Database: 2005-Apr-05
Document File: 2 page(s) / 65K

Publishing Venue

IBM

Related People

Le, HH: AUTHOR [+2]

Abstract

Abstract: The current suspension design is divided into 2 different groups: CIS (Circuit Integrated Suspension) 3-piece suspension, and ILS (Integrated Lead Suspension) 3-piece suspension. The common feature of these two types of suspension is a flexure which has 3 different layers: stainless steel, polymer, and copper traces. With these designs, there is some possibility of damage to the traces due to the handling or shock. A partial etch or forming channel with a cover can be used to reduce these problems.

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Protecting All The Traces By Turning The Flexure Upside Down

   Abstract:

   The current suspension design is divided into 2 different
groups: CIS (Circuit Integrated Suspension) 3-piece suspension, and
ILS (Integrated Lead Suspension) 3-piece suspension.  The common
feature of these two types of suspension is a flexure which has 3
different layers:  stainless steel, polymer, and copper traces.  With
these designs,  there is some possibility of damage to the traces due
to the handling or shock.  A partial etch or forming channel with a
cover can be used to reduce these problems.

   Description:

   Referring to the figure 1, the current flexure or
integrated gimbal design is comprised of 3 different layers:
stainless steel 4, polymide 5, and copper traces 6.  With these
designs, the copper traces are fully exposed and can be damaged
during the handling or shock.  The first proposal is shown in figure
2 for CIS integrated gimbal suspension.  The stainless steel 4 is
partially etched on one side to reduce the thickness.  Then polymide
5 and copper traces 6 layers are placed on the etched area of the
stainless steel layer 4, so the height of the traces can be reduced.
The second proposal is shown in figure 3 for CIS 3-pieces suspension.
The stainless steel 4 has a formed channel on the edge, then the
whole flexure is covered by the load beam 7.  The third proposal is
shown in figure 4 for TSA 3-pieces suspension.  The load beam 7 is
partially etched on one sid...