한국정밀공학회:학술대회논문집 (Proceedings of the Korean Society of Precision Engineering Conference)

한국정밀공학회 (Korean Society for Precision Engineering)
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Micro-machining of nickel by picosecond laser ablation

  • Shin D.S. (IT Machinery Research Center, KIMM) ;
  • Lee J.H. (IT Machinery Research Center, KIMM) ;
  • Suh J. (IT Machinery Research Center, KIMM) ;
  • Noh J.W. (IT Machinery Research Center, KIMM) ;
  • Chung Y.W. (IT Machinery Research Center, KIMM) ;
  • Kim J.C. (Nanomechanical Systems Research Center, KIMM)
  • 발행 : 2006.05.01
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초록

In case of ultrashort laser ablation of metals, the transfer of energy from the electronic system causing strong absorption of laser light to the lattice needs relaxation times of the order of some picoseconds. Under the above theoretical background, nickel was ablated using femtosecond, picosecond and nanosecond laser. As a result, nickel ablation by picosecond laser and femtosecond laser, which are called ultrashort laser, has similar machinability because of relaxation time of metals, whereas nanosecond Nd:YAG laser has lower absorption, higher thermalization effect in comparison with ultrashort laser.

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