METHOD FOR CUTTING GLASS PLATE
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United States of America Patent
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app pub date -
Dec 16, 2013
filing date -
Jun 15, 2011
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Abandoned
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Abstract
A method for cutting a glass plate includes a first step of radiating a laser beam onto a front surface of the glass plate and forming a crack in the glass plate. The laser beam has a wavelength of 5000-11000 nm and becomes a linear beam at the front surface of the glass plate. The linear beam is formed into a shape conforming to a predetermined cut line, has a length greater than or equal to 10 mm along the predetermined cut line and a width less than or equal to 3 mm, and has an intensity distribution substantially uniform along the predetermined cut line. In the first step, a position of the linear beam in the front surface of the glass plate is fixed for a prescribed time, and at least one end part of the linear beam is located at an outer peripheral part of the glass plate.
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