Glass Plate and its Manufacturing Method

Abstract

This invention provides a method for manufacturing a glass plate that improves the production efficiency of glass plates with through holes and prevents glass plate breakage. The method for manufacturing the glass plate 11 of this invention includes: a glass plate preparation step, which prepares a glass plate 1; a laser irradiation step, which irradiates a predetermined position 2 of the through hole in the first main surface 1a of the glass plate 1 with laser light to form a modified portion 3; a film application step, which applies a protective film 4 to the second main surface 1b of the glass plate 1; a single-sided etching step, which etches the glass plate 1 while the protective film 4 is applied to the second main surface 1b of the glass plate 1; a film peeling step, which peels the protective film 4 from the second main surface 1b of the glass plate 1; and a double-sided etching step, which etches the glass plate 1 while the protective film 4 has been peeled from the second main surface 1b of the glass plate 1, forming through holes 12 in the obtained glass plate 11.

Images