CRYSTALLIZED GLASS BODY, METHOD FOR MANUFACTURING CRYSTALLIZED GLASS BODY, METHOD FOR MANUFACTURING CRYSTALLIZED GLASS SUBSTRATE BLANK, METHOD FOR MANUFACTURING MAGNETIC DISK SUBSTRATE, AND METHOD FOR MANUFACTURING MAGNETIC DISK

PROBLEM TO BE SOLVED: To provide crystallized glass bodies which each have a columnar shape and can be simultaneously sliced in a high precision when a plurality of them are stacked in a state aligned in the longitudinal direction; a method for manufacturing the same; a method for manufacturing crys...

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Bibliographische Detailangaben
1. Verfasser:	SUU GAKUROKU
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS GLASS INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER JOINING GLASS TO GLASS OR OTHER MATERIALS MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES METALLURGY MINERAL OR SLAG WOOL PHYSICS SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS SURFACE TREATMENT OF GLASS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE
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Zusammenfassung:	PROBLEM TO BE SOLVED: To provide crystallized glass bodies which each have a columnar shape and can be simultaneously sliced in a high precision when a plurality of them are stacked in a state aligned in the longitudinal direction; a method for manufacturing the same; a method for manufacturing crystallized glass substrate blanks; a method for manufacturing magnetic disk substrates from the crystallized glass substrate blanks, and a method for manufacturing magnetic disks from the magnetic disk substrates. SOLUTION: The crystallized glass bodies are each obtained by heat treating a glass formed body and each have such a columnar shape that the tolerance of the outer diameter is ≥-0.2 mm and ≤0.2 mm, and the straightness is ≤5×10-5×L mm, wherein, L is length of the glass body. The method for manufacturing the crystallized glass bodies is also provided. The method for manufacturing the crystallized glass substrate blanks comprises slicing each crystallized glass body. The method for manufacturing the magnetic disk substrates comprises polishing the main surface of each crystallized glass substrate blank. The method for manufacturing the magnetic disks comprises forming a magnetic recording layer on each magnetic disk substrate. COPYRIGHT: (C)2007,JPO&INPIT