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Copper Foil with Imbedded Breather Filter

IP.com Disclosure Number: IPCOM000104143D
Original Publication Date: 1993-Mar-01
Included in the Prior Art Database: 2005-Mar-18
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Ulrich, SD: AUTHOR

Abstract

Disclosed is a copper foil laminate with an imbedded breather filter system for use in disk drive manufacturing. The imbedded filter uses the natural boundary created by the mechanical mating of the cover to the base in a disk drive assembly to form a "breather airflow channel". The mating boundary becomes functional, thus supplanting a potential leakage problem due to conventional sealing at the mating seam with a functional air flow characteristic.

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Copper Foil with Imbedded Breather Filter

      Disclosed is a copper foil laminate with an imbedded breather
filter system for use in disk drive manufacturing.  The imbedded
filter uses the natural boundary created by the mechanical mating of
the cover to the base in a disk drive assembly to form a "breather
airflow channel".   The mating boundary becomes functional, thus
supplanting a potential leakage problem due to conventional sealing
at the mating seam with a functional air flow characteristic.

The system building blocks follow:

1.  Copper foil laminate

2.  Diffuser layer

3.  Breather filter layer

4.  Designed air flow channel(s)

      The copper foil laminate 1 with the imbedded breather filter(s)
2 is applied to the disk drive along the mating seam of the file
halves.  The breather filter contours the mating seam at a specific
design point(s).  The design point(s) forms the air flow channel(s) 3
which has been optimized around the pressure differentials of the
disk drive under operation.  Thus, the need for conventional seals at
mating boundaries is supplanted with an air flow channel(s) and
breather filtering at the optimized design point(s) (see figure).