Drilling of FR-4 Composite Materials Using Single Pulse of Nd:YAG Laser

  • Osamah F. Abdulateef Department of Automated Manufacturing Engineering/ AL-Khwarizmi College of Engineering/ University of Baghdad
  • Enas A. Khalid Department of Automated Manufacturing Engineering/ AL-Khwarizmi College of Engineering/ University of Baghdad
  • Amer G. Hoss Department of Automated Manufacturing Engineering/ AL-Khwarizmi College of Engineering/ University of Baghdad
Keywords: Nd:YAG Laser, FR-4 Composite materials, Laser Drilling

Abstract

Laser drilling is capable of producing small, precisely positioned holes with high degree of reproductively. In this paper , IR millisecond Nd:YAG single pulsed laser was used to determine the effect of laser parameters on the drilled hole of the glass - fiber reinforced epoxy composite FR-4 sample of 2 mm in thickness . The type of laser source was GSI lumonics JK760TR Series laser 1.064μm system in a CNC cabin. The JK760TR series has a 0.3-50ms pulse length and a maximum repetition rate 500Hz with an average power of 600W. The investigation of single pulse laser drilling in this paper was based on theoretical and experimental solutions. In single pulse technique, the investigation included focal plane position fpp, pulse shape, laser peak power, and pulse duration. It was found that (-1) was the best fpp due to less taper for the drilled holes made by this level (Entrance hole =0.68, Exit hole = 0.27). To predict pulse shape effects; three types were : rectangular , rump-up and cool down, it were  examined found that rectangular pulse was efficient  more than the other types due to its ability to produce holes with less tapering as compared with others types. Also its found that all pulse shapes had the same effect on the materials microstructure . Laser peak power and pulse duration had the predominant affects on the hole dimensions and edge quality without any defect except hole tapering.  

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Published
2013-06-30
How to Cite
Abdulateef, O., Khalid, E., & Hoss, A. (2013). Drilling of FR-4 Composite Materials Using Single Pulse of Nd:YAG Laser. Al-Khwarizmi Engineering Journal, 9(2), 1-11. Retrieved from https://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/163
Section
Articles