GLASS SUBSTRATE AND ITS MANUFACTURING METHOD

PROBLEM TO BE SOLVED: To provide a glass substrate, which has excellent melt moldability and few internal defects such as an air bubble, whose cost is remarkably reduced due to the extension of the service life of its manufacturing equipment, and whose waviness is so small that it is shipped without...

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Bibliographische Detailangaben
Hauptverfasser:	CHOJU KEN, TOMITA YUSUKE, MIWA SHINKICHI
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING FREQUENCY-CHANGING GLASS JOINING GLASS TO GLASS OR OTHER MATERIALS MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES METALLURGY MINERAL OR SLAG WOOL NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS SURFACE TREATMENT OF GLASS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a glass substrate, which has excellent melt moldability and few internal defects such as an air bubble, whose cost is remarkably reduced due to the extension of the service life of its manufacturing equipment, and whose waviness is so small that it is shipped without grinding since it is molded into a plate through an overflow-down-draw method, and to provide a manufacturing method for the glass substrate. SOLUTION: The glass substrate is made of glass, whose strain point is 530-630°C, whose temperature corresponding to 102.5dPa.s is 1,370-1,520°C, and whose viscosity at a liquid-phase temperature is ≥100,000 poise. The translucent surface of the glass substrate is a non-ground surface. COPYRIGHT: (C)2006,JPO&NCIPI