GLASS ARTICLE SUPPRESSED FROM VARYING IN THICKNESS, METHOD OF MAKING THE SAME, AND APPARATUS THEREFOR

• Main Authors: RONALD LEE KIMBALL, BRADLEY FREDERICK BOWDEN, STEVEN HOWARD TARCZA, WILLIAM ANTHONY WHEDON, ANDREA WEISS BOOKBINDER
• Format: Patent
• Language: English; Japanese
• Published: 18.02.2021
• Subjects: CHEMISTRY; GLASS; MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES; METALLURGY; MINERAL OR SLAG WOOL

To provide a glass article having its thickness variation minimized over the entire width.SOLUTION: The present invention relates to a glass platter blank 20 that has a first principal surface 22, a second principal surface 24 opposed to the first principal surface, and a thickness T defined therebetween, and that also has a total thickness variation TTV across the diameter of the glass platter blank equal to or less than about 2 μm. Further, a maximum sliding interval range MSIR obtained from an interval of 25 mm moved in 5 mm increments across the diameter of the glass platter blank is equal to or less than about 2 μm.SELECTED DRAWING: Figure 4 【課題】ガラス物品の幅全体にわたる厚み変動を最小限に抑制した物品の提供。【解決手段】ガラスプラッターブランク２０であって、第１の主面２２、前記第１の主面に対向する第２の主面２４、及びその間に画成される厚さＴを有し、前記ガラスプラッターブランクの直径にわたる全厚み変動ＴＴＶが、約２μｍ以下であるプラッターブランク。更にガラスプラッターブランクの直径にわたり、５ｍｍ単位で移動させた、２５ｍｍの間隔から得られる最大スライド間隔範囲ＭＳＩＲが、約２μｍ以下である。【選択図】図４