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Title: Laser cleaning of printed circuit boards
Authors: Song, W.D. 
Hong, M.H. 
Lu, Y.F. 
Chong, T.C. 
Keywords: Acoustic wave
Laser cleaning
Printed circuit board
Resin contaminants
Issue Date: 15-Mar-2003
Citation: Song, W.D., Hong, M.H., Lu, Y.F., Chong, T.C. (2003-03-15). Laser cleaning of printed circuit boards. Applied Surface Science 208-209 (1) : 463-467. ScholarBank@NUS Repository.
Abstract: Laser cleaning of printed circuit boards (PCB) has been studied in this paper. It is demonstrated that laser cleaning is a powerful tool to remove resin contaminants from printed circuit boards. A Nd:YAG laser is used as a light source for laser cleaning. The beam profile of the YAG laser is reshaped and homogenized into a square beam with uniform energy distribution in the focal plane of the focusing lens by using an optical system. The printed circuit board surfaces before and after laser cleaning were inspected by an optical microscope, analysed by X-ray photoelectron spectroscopy and monitored by an acoustic wave detection method. The cleaning threshold is about 75 mJ/cm2 and no damage is observed below 400 mJ/cm2. © 2002 Elsevier Science B.V. All rights reserved.
Source Title: Applied Surface Science
ISSN: 01694332
DOI: 10.1016/S0169-4332(02)01434-4
Appears in Collections:Staff Publications

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