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Method of Coating Magnetic Disks

IP.com Disclosure Number: IPCOM000091034D
Original Publication Date: 1969-Sep-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Fleck, HR: AUTHOR

Abstract

A magnetic disk is made by casting a precatalyzed polyester coat, forced by spinning onto an aluminum substrate. The substrate is placed onto an optically flat glass and cured. The cured substrate and fine finished polyester coat are then removed from the glass. The polyester coat adheres to the metal substrate, filling all the pits and imperfections. A finish coat of magnetic iron oxide is spun onto the polyester coat to complete the disk assembly. Curing can be accomplished by chemically induced catalysis, electron irradiation, or gamma-ray induced catalysis. Also, thermal catalysis or after-hardening to complete the cure can be applied by infrared lamps or by a convection oven.

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Method of Coating Magnetic Disks

A magnetic disk is made by casting a precatalyzed polyester coat, forced by spinning onto an aluminum substrate. The substrate is placed onto an optically flat glass and cured. The cured substrate and fine finished polyester coat are then removed from the glass. The polyester coat adheres to the metal substrate, filling all the pits and imperfections. A finish coat of magnetic iron oxide is spun onto the polyester coat to complete the disk assembly. Curing can be accomplished by chemically induced catalysis, electron irradiation, or gamma-ray induced catalysis. Also, thermal catalysis or after-hardening to complete the cure can be applied by infrared lamps or by a convection oven.

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