CLEAVING METHOD FOR TEMPERED GLASS

摘要

A cleaving method for tempered glass includes forming a scribe line in the tempered glass from a front surface side of the tempered glass in a thickness direction along a preset cleaving line, followed by cleaving the tempered glass with the scribe line being set as a boundary. The tempered glass includes a front surface-side compressive stress layer formed on the front surface side and having compressive stress applied thereto, a back surface-side compressive stress layer formed on a back surface side of the tempered glass in the thickness direction and having compressive stress applied thereto, and an intermediate tensile stress layer formed between the front and back surface-side compressive stress layers and having tensile stress applied thereto. The forming of the scribe line includes increasing a thickness of the front surface-side compressive stress layer at least in the vicinity of the preset cleaving line.

主权项

1. A cleaving method for tempered glass, comprising forming a scribe line on a front surface side of the tempered glass along a preset cleaving line, followed by cleaving the tempered glass with the scribe line as a boundary,
the tempered glass comprising:
a front surface-side compressive stress layer being formed on the front surface side of the tempered glass in the thickness direction and having compressive stress applied thereto;a back surface-side compressive stress layer being formed on a back surface side of the tempered glass in the thickness direction and having compressive stress applied thereto; andan intermediate tensile stress layer being formed between the front surface-side compressive stress layer and the back surface-side compressive stress layer and having tensile stress applied thereto, the forming of the scribe line comprising increasing a thickness of the front surface-side compressive stress layer at least in the vicinity of the preset cleaving line.