Glass article and method for fabricating the same

Patent metadata

Field	Value
Publication number	US-2024150214-A1
Application number	US-202418412263-A
Country	US
Kind code	A1
Filing date	Jan 12, 2024
Priority date	Apr 21, 2020
Publication date	May 9, 2024
Grant date	—

Abstract

A glass article includes a first surface; a second surface opposed to the first surface; a side surface connecting the first surface to the second surface; a first surface compressive region extending from the first surface to a first depth; a second surface compressive region extending from the second surface to a second depth; and a side compressive region extending from the side surface to a third depth, where the first surface and the side surface are non-tin surfaces, the second surface is a tin surface, and a maximum compressive stress of the second surface compressive region is greater than a maximum compressive stress of the first surface compressive region.

First claim

What is claimed is:

1 . A method for fabricating a glass article, the method comprising:
molding a glass having a tin surface by floating a molten glass raw material above molten tin; forming a protective layer on the tin surface of the molded glass; cutting the glass to a predetermined size; three-dimensionally machining a non-tin surface opposed to the tin surface, the protective layer being formed on the tin surface; primarily polishing the glass; removing the protective layer; and chemically strengthening the glass from which the protective layer has been removed.

2 . The method of claim 1 , further comprising:
secondarily polishing the chemically strengthened glass.

3 . The method of claim 2 , wherein the primarily polishing comprises polishing the tin surface and the non-tin surface, and
the secondarily polishing comprises polishing the non-tin surface.

4 . The method of claim 1 , wherein the forming of the protective layer on the tin surface comprises attaching a film to the tin surface.

5 . The method of claim 1 , wherein the chemically strengthening comprises immersing the glass in a potassium nitrate molten salt at a temperature of about 300 degrees Celsius (° C.) to about 500° C.

6 . The method of claim 1 , further comprising: between the removing of the protective layer and the chemically strengthening of the glass from which the protective layer has been removed, three-dimensionally machining the tin surface,
wherein the tin surface machined three-dimensionally has a smaller area than the non-tin surface machined three-dimensionally.

7 . The method of claim 1 , wherein the three-dimensionally machining is performed using computer numeric control (CNC) machining equipment.

Assignees

• Samsung Display Co Ltd

Inventors

• Sung Su Jin
• Kang Byung Hoon
• Kim Seung
• Park Young Ok
• Shim Gyu In

Classifications

• B24B7/242

  for plate glass · CPC title

• C03B18/02 Primary

  Forming sheets · CPC title

• C03C21/002 Primary

  to perform ion-exchange between alkali ions (C03C21/005 takes precedence) · CPC title

• C03C19/00

  Surface treatment of glass, not in the form of fibres or filaments, by mechanical means (sand-blasting, grinding, or polishing glass B24) · CPC title

• C03B33/074

  Glass products comprising an outer layer or surface coating of non-glass material · CPC title