Laser Joining Method

摘要

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.

主权项

1. A laser joining method, comprising:
a photooxidation-processing step of applying a photooxidation processing onto a second light-translucent resin; and a joining step of causing the photooxidation-processing applied surface of the second light-translucent resin to be opposed to a first light-translucent member, and joining the first light-translucent member and the second light-translucent resin with each other by irradiating the joining surface of the first light-translucent member and the second light-translucent resin with laser light.