Laser joining method
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United States of America Patent
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Aug 23, 2016
Grant Date -
Nov 13, 2014
app pub date -
Nov 28, 2012
filing date -
Dec 9, 2011
priority date (Note) -
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Abstract
The present invention provides a method for stably and robustly laser-welding transparent resins together without compromising transparency. Before laser welding, the joining surface of at least a second transparent resin is subjected to photooxidation, thereby reducing the laser transmittance without reducing the visible light transmittance. A laser beam in the ultraviolet region at a wavelength of 400 nm or less, or a laser beam with a pulse width of 10 ps or less is irradiated while the second transparent resin is pressurized to perform laser welding.
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