Study on the speed threshold of PCB cutting using three kinds of Q-switched lasers

Meng Zhang; Xi Yang; Yun Huang; Hao Xing; Ruina Fang; Weijiang Wang; He Cai; Guofei An; Xiaoxu Liu; Juhong Han; Chenxu Wang; You Wang

doi:10.1117/12.2651630

10 May 2023 Study on the speed threshold of PCB cutting using three kinds of Q-switched lasers

Meng Zhang, Xi Yang, Yun Huang, Hao Xing, Ruina Fang, Weijiang Wang, He Cai, Guofei An, Xiaoxu Liu, Juhong Han, Chenxu Wang, You Wang

Author Affiliations +

Proceedings Volume 12554, AOPC 2022: Advanced Laser Technology and Applications; 125540U (2023) https://doi.org/10.1117/12.2651630
Event: Applied Optics and Photonics China 2022 (AOPC2022), 2022, Beijing, China

Abstract

With the development of laser technology, nanosecond lasers have been widely used in material micromachining due to their advantages such as the narrow pulse width and high-power density. The high-order harmonic generation procedures have been invented to obtain 532, 355, and 266 nm radiations based on a 1064 nm Nd:YAG laser. In this paper, the influence of different sample moving speeds and laser power on the cutting effects were studied using three kinds of laser sources. It can be seen that the state of the cutting surface has not changed obviously when the laser power was increased. The self-defined cutting threshold, i.e., 2.25 W·s/mm, has been obtained by investigating the processing morphology with the power of 1.35 W at different sample moving speeds for both a 355 nm laser and a 266 nm laser. Increasing the laser power to 3.20 W, we obtained the cutting threshold of about 1.80 W·s/mm for a 355 nm laser. The scorching status of the surfaces cut by both a FHG laser and a SHG laser have been found to be more serious than that cut by a THG laser. The experiments have demonstrated that the machining efficiency increases with the laser power, but the cutting quality becomes worse at the same time. The results are thought to be useful for the PCB cutting applications in the industrial fields.

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Meng Zhang, Xi Yang, Yun Huang, Hao Xing, Ruina Fang, Weijiang Wang, He Cai, Guofei An, Xiaoxu Liu, Juhong Han, Chenxu Wang, and You Wang "Study on the speed threshold of PCB cutting using three kinds of Q-switched lasers", Proc. SPIE 12554, AOPC 2022: Advanced Laser Technology and Applications, 125540U (10 May 2023); https://doi.org/10.1117/12.2651630

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KEYWORDS

Laser cutting

Laser damage threshold

Laser processing

Nd:YAG lasers

Laser energy

Second-harmonic generation

Laser applications

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