PROCESS FOR PRODUCING CHEMICALLY STRENGTHENED GLASS

• US 20120247152A1
• Filed: 03/29/2012
• Published: 10/04/2012
• Est. Priority Date: 03/31/2011
• Status: Abandoned Application

• Current Assignee: Asahi Glass Company, Limited (AGC, Inc.)
• Original Assignee: Asahi Glass Company, Limited (AGC, Inc.)
• Inventors: Ohara, Seiki, Ono, Kazutaka, Ishimaru, Masayuki, Osuka, Takuo
• Application Number:
  US13/434,044
• Publication Number:
  US 20120247152A1
• Time in Patent Office: Days
• US Class Current: 65/29.16
• CPC Class Codes: C03C 21/002 to perform ion-exchange between alkali ions C03C21/005 takes precedence
• CPC Class Codes: G01N 21/45 using interferometric methods; using Schlieren methods

Abstract

The present invention relates to a process for producing a chemically strengthened glass, which includes conducting a sampling inspection including a measurement of a refractive index distribution of a glass. According to the process of the invention, the surface compressive stress and the depth of the compressive stress layer of the chemically strengthened glass can be stably and accurately measured.

Claims

1. A process for producing a chemically strengthened glass, comprising conducting a sampling inspection including a measurement of a refractive index distribution of a glass.

2. The process for producing a chemically strengthened glass according to claim 1, further comprising chemically strengthening a glass found to have no refractive index distribution as a result of the measurement of the refractive index distribution in the sampling inspection.

3. The process for producing a chemically strengthened glass according to claim 1, further comprising measuring a surface compressive stress and a depth of a compressive stress layer of a chemically strengthened glass in a non-destructive manner.

4. The process for producing a chemically strengthened glass according to claim 2, further comprising measuring a surface compressive stress and a depth of a compressive stress layer of a chemically strengthened glass in a non-destructive manner.

5. The process for producing a chemically strengthened glass according to claim 1, wherein the refractive index distribution is measured by means of a two-beam interferometer.