Laser machining method and device for wafer
A laser processing and wafer technology, applied in metal processing, laser welding equipment, metal processing equipment, etc., can solve the problems of laser beam energy loss, Low-K layer peeling, increasing laser energy, etc., and achieve energy control accuracy High, easy to prepare, and the effect of improving the light absorption rate
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[0056] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is only some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0057] An embodiment of the present invention provides a method for laser processing a wafer, wherein at least two laser beams with different energy distributions respectively perform a roughening process and a grooving process on a predetermined cutting line on the upper surface of the wafer in sequence, using A groove is formed on the prede...
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