Soldering mask laser removal from printed circuit boards aiming copper recycling

作者: Marcus Paulo Raele , Lucas Ramos De Pretto , Denise Maria Zezell

DOI: 10.1016/J.WASMAN.2017.07.019

关键词: CoatingSolderingPrinted circuit boardElectronic wasteFar-infrared laserLaserWaste managementStripping (fiber)EngineeringProcess engineeringEnvironmentally friendly

摘要: Management of waste electric and electronic equipment (WEEE) is a key issue for modern societies; furthermore, it contains valuable materials that can be recycled, especially in printed circuit boards (PCB), which have approximately one-third their weight copper. In this study we demonstrated the use laser to strip covering soldering mask on PCB's, thus exposing copper underneath so extraction techniques may take place. Using Q-Switched Nd:YAG operating at 1064nm 532nm tested procedure under different energy conditions. The stripping was achieved with satisfactory results by irradiation 225mJ 1064nm. However, when using similar parameters process coating ejection not promoted properly, leading faulty detachment. Infrared PCB presents itself technically viable environmental friendly, since uses no chemicals inputs, offering one more option WEEE treatment recycling.

参考文章(22)
Maria Paola, Recycling of Printed Circuit Boards InTech. pp. 285- 298 ,(2011) , 10.5772/17220
Claude Phipps, None, Laser Ablation and its Applications Laser Ablation and its Applications. ,vol. 129, ,(2007) , 10.1007/978-0-387-30453-3
Luciana Harue Yamane, Viviane Tavares de Moraes, Denise Crocce Romano Espinosa, Jorge Alberto Soares Tenório, Recycling of WEEE: Characterization of spent printed circuit boards from mobile phones and computers Waste Management. ,vol. 31, pp. 2553- 2558 ,(2011) , 10.1016/J.WASMAN.2011.07.006
D.E. Roberts, Pulsed laser coating removal by detachment and ejection Applied Physics A. ,vol. 79, pp. 1067- 1070 ,(2004) , 10.1007/S00339-004-2632-Z
S. Georgiou, V. Zafiropulos, D. Anglos, C. Balas, V. Tornari, C. Fotakis, Excimer laser restoration of painted artworks: procedures, mechanisms and effects Applied Surface Science. ,vol. 127, pp. 738- 745 ,(1998) , 10.1016/S0169-4332(97)00734-4
B. N. Chichkov, C. Momma, S. Nolte, F. Alvensleben, A. Tünnermann, Femtosecond, picosecond and nanosecond laser ablation of solids Applied Physics A. ,vol. 63, pp. 109- 115 ,(1996) , 10.1007/BF01567637
Guang Tang, Andrew C. Hourd, Amin Abdolvand, Nanosecond pulsed laser blackening of copper Applied Physics Letters. ,vol. 101, pp. 231902- ,(2012) , 10.1063/1.4769215
Angela C Kasper, Guilherme BT Berselli, Bruno D Freitas, Jorge AS Tenório, Andréa M Bernardes, Hugo M Veit, None, Printed wiring boards for mobile phones: characterization and recycling of copper. Waste Management. ,vol. 31, pp. 2536- 2545 ,(2011) , 10.1016/J.WASMAN.2011.08.013
A.J. Potiens, J.C. Dellamano, R. Vicente, M.P. Raele, N.U. Wetter, E. Landulfo, Laser decontamination of the radioactive lightning rods Radiation Physics and Chemistry. ,vol. 95, pp. 188- 190 ,(2014) , 10.1016/J.RADPHYSCHEM.2013.03.043
Young-Min Kim, Seungdo Kim, Jeong-Yeon Lee, Young-Kwon Park, Pyrolysis Reaction Pathways of Waste Epoxy-Printed Circuit Board Environmental Engineering Science. ,vol. 30, pp. 706- 712 ,(2013) , 10.1089/EES.2013.0166