Coating System for Magnetic Disks
Original Publication Date: 1986-Feb-01
Included in the Prior Art Database: 2005-Mar-08
A coating system for particulate magnetic disks is proposed, wherein the dispersion magnets in the spin-off phase rotate in the same sense but not synchronously with the magnetic disk at a slightly lower speed than the latter, leading to a number of advantages. There is no introduction of He gas causing layer thickness distribution problems. The amount of eddy current heat, which hitherto impaired the coating of the second disk side, is noticeably reduced. There is no contamination of magnet edges by spun off ink. The known "window" effect is reduced, as the vertical alignment of the particles in the field of the dispersion magnets is improved. The dispersion magnets rotate in the same sense as the magnetic disk but at a slightly lower speed than the latter.