公开(公告)号：US20240208854A1

公开(公告)日：2024-06-27

申请号：US18424963

申请日：2024-01-29

Applicant: AGC Inc.

Inventor： Tomoki OWADA ,  Kazuya SASAKI ,  Masahiro KAWAGISHI ,  Satoru KURATA

IPC: C03C3/078 ,  C03C3/06

CPC classification number: C03C3/078 ,  C03C3/06 ,  C03C2204/00

Abstract: The present invention relates to a TiO2-containing silica glass substrate that: contains 6.7-12 mass % of TiO2, expressed as a mass percentage on an oxide basis; has a CTE-slope of 1.40 ppb/K/K or less; and, in at least one main surface and at least one end surface, (A) no striae are observed in a stria evaluation in compliance with JOGIS 11-2008, or (B) the striation intensity corresponds to class A under US military specification MTL-G-174 B.