Patent ID: 6395073
Filing Date: 2002-05-28
Classification: B01D,G11B

Abstract:
A disk drive filter assembly for selectively removing contaminants from a disk drive enclosure comprising:a layer of adhesive having at least one opening therein, each of said at least opening defined by a perimeter, for location over a breather hole in said enclosure; a first filter layer having an air permeability of from 0.05 to 40 Frazier and a particle filtration efficiency of at least 90% for 0.1 micron sized particles adjacent said adhesive layer and covering said at least one opening; and a second filter layer having an air permeability of from 18 to 1000 Frazier and a particle filtration efficiency of at least 55% for 0.1 micron sized particles adjacent said first filtration layer.