Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Effects of Beam Pulse Width and Power Density in Silver Nanowire Welding Using Pulsed IR Laser

적외선 레이저 공정을 통한 실버나노와이어 접합에서의 빔 펄스폭과 출력의 영향

  • Kim, Joohan (Dept. of Mechanical & Automotive Engineering, Seoul Nat'l Univ. of Science and Technology) ;
  • Yoon, Sang Woo (Dept. of Mechanical & Automotive Engineering, Seoul Nat'l Univ. of Science and Technology)
  • 김주한 (서울과학기술대학교 기계.자동차공학과) ;
  • 윤상우 (서울과학기술대학교 기계.자동차공학과)
  • Received : 2014.04.14
  • Accepted : 2014.05.27
  • Published : 2014.08.01
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Abstract

A direct pulsed laser process for welding and networking silver nanowires was developed. The welded nanowire network demonstrated modified electrical properties in a transparent substance. In particular, the welding points on the nanowires were investigated to measure the resistance at the connections. The level of networking in nanowires was explored with respect to various laser pulse widths and average power densities. In particular, the influence of laser beam density was investigated in detail. Selective laser treatment can be advantageous in imparting customized local property changes in transparent conducting materials. Various applications of the process are also discussed in this paper.

펄스 레이저를 적용한 실버나노와이어의 접합 영향이 연구되었다. 조사된 레이저 펄스 에너지는 실버나노와이어 네트워크에서 실버나노와이어간에 접합을 유도하였으며 이로 인해 투명 기저위의 실버나노와이어 네트워크 박막에 전기 저항값을 조절할 수 있었다. 특히 이러한 나노네트워크에서의 접합은 개별 나노와이어의 접촉점의 형태로 발생되었고 접합의 효과는 전체 실버나노와이어 네트워크의 전기저항 변화 측정으로 평가하였다. 또한 레이저 빔 펄스폭 및 레이저 평균 출력이 나노와이어 접합 비율 평가에 적용되어 연구되었다. 실버나노와이어 네트워크의 광학 특성도 관찰되었으며 이에 레이저 공정 요소 대비 효과도 연구되었다. 최적화된 레이저빔 적용 재료처리는 특화된 국부 재료 특성 개선에 장점을 보였다. 펄스 레이저를 이용한 실버나노와이어의 재료처리의 적용과 그 효과에 대해서도 논의한다.

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References

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