Invention Grant
- Patent Title: Laser scoring of glass sheets at high speeds and with low residual stress
- Patent Title (中): 高速玻璃板激光刻痕,残余应力低
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Application No.: US12008949Application Date: 2008-01-15
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Publication No.: US08011207B2Publication Date: 2011-09-06
- Inventor: Anatoli A. Abramov , Yawei Sun , Wei Xu , Naiyue Zhou
- Applicant: Anatoli A. Abramov , Yawei Sun , Wei Xu , Naiyue Zhou
- Applicant Address: US NY Corning
- Assignee: Corning Incorporated
- Current Assignee: Corning Incorporated
- Current Assignee Address: US NY Corning
- Agent Thomas R. Beall
- Main IPC: C03B33/00
- IPC: C03B33/00 ; C03B33/02 ; C03B33/037

Abstract:
Experimental data is presented which shows that laser scoring of glass sheets (112) with existing techniques produces unacceptable levels of residual stress in the separated sheets as the scoring speed is increased. Methods for solving this problem are disclosed which employ elongated and, preferably, asymmetrically-truncated laser beams (13). The methods allow glass sheets (112) to be scored at speeds of 1000 mm/s and above with low levels of residual stress, e.g., levels of residual stress which are less than or equal to 500 psi. Such low levels of residual stress translate into low levels of distortion during the manufacture of display panels (e.g., LCD panels) as well as in improved properties of the separated edges. The methods can be used with glasses of various types including glasses having low coefficients of thermal expansion.
Public/Granted literature
- US20090126403A1 Laser scoring of glass sheets at high speeds and with low residual stress Public/Granted day:2009-05-21
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