• Proceedings of the Korean Society of Laser Processing Conference
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• 1998.11a
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• pp.43-46
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• 1998

• Journal of the Korean Society for Precision Engineering
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• v.17 no.7
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• pp.27-35
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• 2000

재료가공분야에의 레이저의 적용은 1960년대 후반부터 시작되었으며, 고출력 CO$_2$ 와 Nd:YAG 레이저가 많은 산업분야에서 보편화될 정도로 발전하여 왔다. 재료가공에서의 레이저의 적용분야는 금속의 절단, 용접 및 드릴링, 세라익의 스크라이빙, 플라스틱과 복합재의 절단 및 여러 가지 재료의 마킹 등을 포함한다. 이와 같은 모든 응용에서 공통적인 것이 레이저 조사에 의해 재료를 용융, 증발시키는 열적 메카니즘이다.(중략)

• Proceedings of the Korean Society of Laser Processing Conference
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• 2000.11a
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• pp.14-18
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• 2000

No Abstract, See Full Text

• Proceedings of the Korean Society of Laser Processing Conference
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• 2003.05a
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• pp.3-8
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• 2003

• Proceedings of the Korean Society of Laser Processing Conference
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• 2005.06a
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• pp.85-90
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• 2005

• Proceedings of the Korean Society of Laser Processing Conference
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• 2006.06a
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• pp.9-15
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• 2006

• Proceedings of the Korean Society of Laser Processing Conference
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• 2005.11a
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• pp.114-121
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• 2005

• Proceedings of the Korean Society of Laser Processing Conference
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• 2005.11a
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• pp.109-113
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• 2005

• Journal of the Korean Society for Precision Engineering
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• v.24 no.2 s.191
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• pp.134-139
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• 2007

Usually nanosecond pulsed laser processing of metal is mainly affected by the thermal ablation. Many studies of the theoretical analysis and modeling to predict the laser ablation of metal are suggested on the basis of the photothermal mechanism at higher laser fluence. In this paper, we investigate the etching depth and laser fluence of laser ablation of copper foils and propose the simplified SSB Model(Srinivasan-Smrtic-Babu model) to study the photothermal effect of nanosecond pulsed laser ablation. The experimental results show that the photothermal ablation of the 355nm DPSS $NdYVO_{4}$ laser is useful to process the copper thin foils.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2006.05a
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• pp.163-164
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• 2006

In this paper, an analytical laser ablation model with Maxwell equation will be addressed by considering relationship between laser ablation and material. The Maxwell equation consists of four equations: two Gauss laws for electric and magnetic fields, Faraday's law, and Ampere's law. This analytical model will be calculated by employing Finite Difference Time Domain (FDTD). This method also makes it possible to simulate the laser beam propagation in a wide range of materials, such as metals, semiconductors, and dielectrics. Therefore, in this study, a numerical model for short pulse laser interaction with materials is developed, focusing on the accurate description of laser beam propagation and ablation process into the material with each pulse.