Elimination of Breather Holes in Magnetic Disk Files
Original Publication Date: 1989-Oct-01
Included in the Prior Art Database: 2005-Jan-29
The continued trend in magnetic recording disk drives is to increase the areal storage density. This is being accomplished by increasing the linear recording density and the track density which, in turn, require the lowering of the head-flying height. Lower flying heights are feasible only by assuring contamination-free operation of the drive over its expected life time. Experience has shown that certain chemical contaminants and moisture, entering the disk enclosure through the air breather opening, can lead to head crashes or can cause hard read errors. The objective of this invention is to eliminate the need for having the air breather opening. This is accomplished by means of a low cost device which will allow equalization of the internal pressure with the barometric pressure outside the enclosure.