| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a glass substrate capable of preventing occurrences of microcracks on cutting edge planes of glass substrates manufactured by cutting a large-size glass substrate.SOLUTION: A thin scheduled-to-be-cut portion 6 having a specified width is formed on a scheduled-to-be-cut site of a large-size glass substrate 1 by etching. The thickness of the thin scheduled-to-be-cut portion 6 is set to be equal to or less than the thickness t3 of a chemically fortified layer formed as a result of a chemical fortifying treatment at the next step so as to transform the thin scheduled-to-be-cut portion 6 into the chemically fortified layer over the entire thickness direction thereof. At the next cutting step, the thin scheduled-to-be-cut portion 6 consisting of the chemically fortified layer is cut. It becomes possible to prevent or inhibit occurrences of post-cutting strength irregularities and yield losses of touch panels 3 owing to microcracks generated on cutting edge planes formed as a result of the cutting of the portion of the glass substrate 1 on the inner side of the chemically fortified layer. |
