LASER MACHINING METHOD AND LASER MACHINING DEVICE
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United States of America Patent
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app pub date -
Sep 7, 2012
filing date -
Sep 16, 2011
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Abstract
Laser light L is converged at an object to be processed 1 formed from quartz, so as to provide the object 1 with a modified region 7 including a plurality of modified spots S along a line to cut 5. At this time, the laser light L is relatively moved along the line 5 while irradiating the object 1, so as to form the plurality of modified spots S with a pitch of 2 μm to 9 μm along the line 5. This can optimize the pitch between the plurality of modified spots S to be formed, so as to link fractures favorably to each other between the plurality of modified spots S.
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