Importance

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Abstract

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.

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First Claim