Dome or bowl shaped glass and method of fabricating dome or bowl shaped glass

Abstract

A glass sheet includes a first major surface, a second major surface opposite to the first major surface, and an edge surface extending between the first major surface and the second major surface. The glass sheet includes a thickness between 0.3 mm and 2 mm. The glass sheet includes a dome or bowl shape.

Description

[0001] background [0002] Cross References to Related Applications [0003] This application claims the benefit of priority under 35 U.S.C. §119 to U.S. Provisional Application Serial No. 62 / 629338, filed February 12, 2018, and U.S. Provisional Application Serial No. 62 / 463198, filed February 24, 2017 , their respective contents serve as the basis for this article and are incorporated herein by reference in their entirety. technical field [0004] The present disclosure generally relates to glass sheets and glass substrates and methods of making glass sheets and glass substrates. More particularly, the present disclosure relates to glass substrates for hard disk drives and methods of manufacturing glass substrates using glass manufacturing processes or systems, such as glass manufacturing processes and systems utilizing glass drawing equipment. Background technique [0005] It has been more than 60 years since IBM designed and manufactured the first magnetic recording har...

AI Technical Summary

Problems solved by technology

Compression molded discs are typically thicker than 1 mm, which requires multiple grinding steps to reduce the thickness to the target thickness of less than 0.7 mm, making it difficult to economically produce substrates by this method

Compression molding also makes it difficult to achieve precise control of the green body shape or to maintain the green body shape during such a large amount of material removal

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