公开(公告)号：US10450216B2

公开(公告)日：2019-10-22

申请号：US14862525

申请日：2015-09-23

Applicant: AGC Inc.

Inventor： Isao Saito ,  Takahiro Nagata

IPC: C03B33/09 ,  B23K26/402 ,  B23K26/064 ,  B23K26/50 ,  B23K26/06 ,  B23K26/08 ,  B23K26/12 ,  B23K26/00 ,  B23K26/066 ,  B23K26/40 ,  B23K26/361 ,  B23K103/00

Abstract: A glass sheet processing method is provided for irradiating a laser beam on a glass sheet and forming a cleavage in the glass sheet with thermal stress. If each of an irradiation area of the laser beam on the surface and an irradiation area of the laser beam on the back face of the glass sheet includes a peak position of a power density of the laser beam, each irradiation area has an asymmetrical power density distribution that is asymmetrical with respect to a reference line that passes through the peak position and is parallel to a moving direction of the peak position. If each irradiation area has no peak position, each irradiation area has an asymmetrical shape that is asymmetrical with respect to a reference line that passes through a centroid position of the irradiation area and is parallel to a moving direction of the centroid position.

公开(公告)号：US10654742B2

公开(公告)日：2020-05-19

申请号：US16047660

申请日：2018-07-27

Applicant: AGC Inc.

Inventor： Isao Saito ,  Yasumasa Kato

IPC: C03B27/012 ,  C03B27/04 ,  C03B29/02 ,  C03B29/08 ,  C03C21/00

Abstract: To provide a method for tempering glass to obtain tempered glass having high surface quality and a deep compression stress layer. The present invention relates to a method for tempering a glass plate comprising a preparation step of preparing a glass plate having a surface temperature of at most the strain point, an internal heating step of heating the internal temperature of the glass plate to be at least the annealing point, while maintaining the surface temperature of the glass plate within 10 minutes, or to be at most the strain point, and a cooling step of cooling the glass plate.