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/cm 2 and no damage is observed below 400 mJ/cm 2 .
| Original language | English (US) |
|---|---|
| Pages (from-to) | 463-467 |
| Number of pages | 5 |
| Journal | Applied Surface Science |
| Volume | 208-209 |
| Issue number | 1 |
| DOIs | |
| State | Published - Mar 15 2003 |
| Externally published | Yes |
Keywords
- Acoustic wave
- Laser cleaning
- Printed circuit board
- Resin contaminants
ASJC Scopus subject areas
- General Chemistry
- Condensed Matter Physics
- General Physics and Astronomy
- Surfaces and Interfaces
- Surfaces, Coatings and Films