Method for preparing a substrate for a magnetic disk
AssigneeKomag, Inc.
InventorsCaroline A. Ross, Martin Philip Rosenblum
Life of this patent
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Abstract
A method for manufacturing a magnetic disk comprises the step of depositing a metallic layer on a glass substrate and laser texturing the metallic layer. The magnetic disk is then completed by deposition of (a) an underlayer such as Cr or sputtered NiP, (b) a magnetic layer such as a Co or Fe alloy, and (c) a protective overcoat such as ZrO.sub.2, carbon or hydrogenated carbon. By providing the above-mentioned metallic layer, laser texturing can now be used in conjunction with glass substrates.
Claims24
A method of making a magnetic disk comprising the steps of:
- depositing a metallic initiation layer on an unpolished glass ceramic substrate;
- electroless plating a texture layer on said metallic initiation layer, said initiation layer initiating electroless plating of said texture layer onto said substrate;
- polishing said texture layer;
- laser texturing said texture layer;
- and
- depositing a magnetic layer on said texture layer.
A method for manufacturing a magnetic disk comprising the steps of:
- depositing a metallic initiation layer onto a glass ceramic substrate;
- electroless plating a NiP layer onto said substrate after said step of depositing said metallic initiation layer, said initiation layer initiating said electroless plating of NiP;
- laser texturing said NiP layer;
- and
- depositing a magnetic layer onto said NiP layer after said step of laser texturing.
Method of making a magnetic disk comprising the steps of:
- depositing an initiation layer on an unpolished glass ceramic substrate;
- electroless plating a plated layer on said initiation layer, said initiation layer
- initiating electroless plating of said plated layer on said substrate;
- polishing said plated layer;
- texturing said plated layer;
- and then
- depositing an underlayer and a magnetic layer onto said plated layer.
A method for making a magnetic disk comprising the steps of:
- depositing a texture layer on a glass ceramic substrate, said texture layer comprising a nickel-niobium alloy;
- laser texturing said texture layer;
- and
- depositing a magnetic layer on said texture layer.
Dependencies are inferred from the claim text.