GLASS SUBSTRATE FOR MAGNETIC RECORDING MEDIUM PRODUCTION METHOD THEREOF, AND MAGNETIC RECORDING MEDIUM USING THE SUBSTRATE

The present invention provides a production method of a glass substrate for magnetic recording medium having an inner diameter and an outer diameter comprising an edge polishing step of a glass substrate. In one embodiment of the production method, it has the edge polishing step in which the inner o...

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Bibliographische Detailangaben
Hauptverfasser:	KENTA ITOU, KUNIO HIBINO, TAKASHI SHIMADA
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY DRESSING OR CONDITIONING OF ABRADING SURFACES FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS GLASS GRINDING INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER JOINING GLASS TO GLASS OR OTHER MATERIALS MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING METALLURGY MINERAL OR SLAG WOOL PERFORMING OPERATIONS PHYSICS POLISHING SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS SURFACE TREATMENT OF GLASS TRANSPORTING
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Beschreibung
Zusammenfassung:	The present invention provides a production method of a glass substrate for magnetic recording medium having an inner diameter and an outer diameter comprising an edge polishing step of a glass substrate. In one embodiment of the production method, it has the edge polishing step in which the inner or outer diameter of the glass substrate is chucked, in a single disk process, and the edge surface of the outer or inner diametral side of the glass substrate is polished using a polishing tape or a grindstone. Further, the present invention relates to a magnetic recording medium using the glass substrate. The production method of a glass substrate of the present invention can perform a polishing of edge surface in a high-quality without generating a defect on the surface of the glass substrate. The present invention can provide a superior magnetic recording medium by using the glass substrate.