The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 02, 2025
Filed:
Jan. 12, 2021
Nippon Electric Glass Co., Ltd., Shiga, JP;
NIPPON ELECTRIC GLASS CO., LTD., Shiga, JP;
Abstract
This method includes: an initial crack forming step of forming an initial crack (CR) on a first surface (MG) of a mother glass sheet (MG); and a laser irradiation step of irradiating the mother glass sheet (MG) with laser light (L) to cause a crack (CR) to propagate along a preset cleaving line (CL) through use of the initial crack (CR) as a starting point. The laser irradiation step includes irradiating a second surface (MG) of the mother glass sheet (MG) with the laser light (L) to heat a surface layer (SL) and an inner portion (IL) of the second surface (MG), to thereby cause, through a thermal shock caused by the heating, the crack (CR) to propagate in an entire thickness direction of the mother glass sheet (MG) while propagating along the preset cleaving line (CL).