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US 5,307,593 AGranted
Method of texturing rigid memory disks using an abrasive article
AssigneeMinnesota Mining and Manufacturing Company
InventorsJames A. Lucker, Darlene N. Strecker, Kathleen A. Wagle
Life of this patent
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Abstract
A method for texturing magnetic recording media substrates which have a thin-film metal or metal alloy coating plated onto a substrate using an abrasive composite bonded to a porous backing.
Claims18
A method of texturing a thin-film metal coated substrate of a magnetic recording media before application of a magnetic coating to said substrate, said method comprising the steps of:
- a) providing a rigid substrate having a metal coating on a surface of said rigid substrate;
- b) providing a porous abrasive article in frictional contact with said metal coating, said porous abrasive article comprising an abrasive composite bonded to a porous backing, said abrasive composite further comprising a plurality of abrasive particles distributed in a binder;
- and
- c) abrading said metal coating with said porous abrasive article to form scratches in said metal coating.
1 more element
A method of texturing a thin-film metal coated substrate of a magnetic recording media before application of a magnetic coating to said substrate, said method comprising the steps of:
- a) providing a rigid, circular substrate having a metal coating on a surface of said rigid, circular substrate;
- b) providing a porous abrasive article in frictional contact with said metal coating, said porous abrasive article comprising an abrasive composite bonded to only a portion of a porous nonwoven material backing, said abrasive composite further comprising a plurality of abrasive particles distributed in a binder, said abrasive particles having an average size of about 0.1 to about 3 .mu.m;
- and
- c) abrading said metal coating with said porous abrasive article to form substantially circumferential scratches in said metal coating.
1 more element
Dependencies are inferred from the claim text.