Evaluation of damaged region at the groove edge of TCO film in pulsed fiber laser processing

Yasuhiro Okamoto; Naoya Takahashi; Shin Ichi Nakashiba; Tomokazu Sakagawa; Akira Okada

doi:10.2351/1.5062553

Evaluation of damaged region at the groove edge of TCO film in pulsed fiber laser processing

Yasuhiro Okamoto, Naoya Takahashi, Shin Ichi Nakashiba, Tomokazu Sakagawa, Akira Okada

Research output: Contribution to conference › Paper › peer-review

Abstract

Nonosecond pulsed fiber laser has been widely used for the removal of TCO film, because of its compact oscillator with the flexible processing head. However, the wide bandwidth of wavelength from the fiber laser would deteriorate the edge quality of groove such as cracks and burrs at the resolidified region due to the chromatic aberration. Therefore, the edge quality of scribed groove was experimentally investigated in the removal process of TCO film by the nanosecond pulsed fiber laser of 1060nm in wavelength. The damaged region such as cracks and burrs at the edge of groove could be improved by using achromatic focusing lenses. The singlet lens for focusing optics led to the large damaged region at the edge of groove, and the cracks and burrs appeared remarkably with increasing the pulse energy. The combination of singlet focusing lens and a circle mask to trim the laser beam made it possible to become the damaged region smaller, since the intensity distribution of laser beam could be sharpen at the edge by using the mask with an appropriate diameter hole.

Original language	English
Pages	860-865
Number of pages	6
DOIs	https://doi.org/10.2351/1.5062553
Publication status	Published - Jan 1 2012
Event	31st International Congress on Applications of Lasers and Electro-Optics, ICALEO 2012 - Anaheim, CA, United States Duration: Sep 23 2012 → Sep 27 2012

Other

Other	31st International Congress on Applications of Lasers and Electro-Optics, ICALEO 2012
Country	United States
City	Anaheim, CA
Period	9/23/12 → 9/27/12

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials

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Evaluation of damaged region at the groove edge of TCO film in pulsed fiber laser processing. / Okamoto, Yasuhiro; Takahashi, Naoya; Nakashiba, Shin Ichi; Sakagawa, Tomokazu; Okada, Akira.

2012. 860-865 Paper presented at 31st International Congress on Applications of Lasers and Electro-Optics, ICALEO 2012, Anaheim, CA, United States.

Research output: Contribution to conference › Paper › peer-review

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abstract = "Nonosecond pulsed fiber laser has been widely used for the removal of TCO film, because of its compact oscillator with the flexible processing head. However, the wide bandwidth of wavelength from the fiber laser would deteriorate the edge quality of groove such as cracks and burrs at the resolidified region due to the chromatic aberration. Therefore, the edge quality of scribed groove was experimentally investigated in the removal process of TCO film by the nanosecond pulsed fiber laser of 1060nm in wavelength. The damaged region such as cracks and burrs at the edge of groove could be improved by using achromatic focusing lenses. The singlet lens for focusing optics led to the large damaged region at the edge of groove, and the cracks and burrs appeared remarkably with increasing the pulse energy. The combination of singlet focusing lens and a circle mask to trim the laser beam made it possible to become the damaged region smaller, since the intensity distribution of laser beam could be sharpen at the edge by using the mask with an appropriate diameter hole.",

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AU - Okamoto, Yasuhiro

AU - Takahashi, Naoya

AU - Nakashiba, Shin Ichi

AU - Sakagawa, Tomokazu

AU - Okada, Akira

PY - 2012/1/1

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N2 - Nonosecond pulsed fiber laser has been widely used for the removal of TCO film, because of its compact oscillator with the flexible processing head. However, the wide bandwidth of wavelength from the fiber laser would deteriorate the edge quality of groove such as cracks and burrs at the resolidified region due to the chromatic aberration. Therefore, the edge quality of scribed groove was experimentally investigated in the removal process of TCO film by the nanosecond pulsed fiber laser of 1060nm in wavelength. The damaged region such as cracks and burrs at the edge of groove could be improved by using achromatic focusing lenses. The singlet lens for focusing optics led to the large damaged region at the edge of groove, and the cracks and burrs appeared remarkably with increasing the pulse energy. The combination of singlet focusing lens and a circle mask to trim the laser beam made it possible to become the damaged region smaller, since the intensity distribution of laser beam could be sharpen at the edge by using the mask with an appropriate diameter hole.

AB - Nonosecond pulsed fiber laser has been widely used for the removal of TCO film, because of its compact oscillator with the flexible processing head. However, the wide bandwidth of wavelength from the fiber laser would deteriorate the edge quality of groove such as cracks and burrs at the resolidified region due to the chromatic aberration. Therefore, the edge quality of scribed groove was experimentally investigated in the removal process of TCO film by the nanosecond pulsed fiber laser of 1060nm in wavelength. The damaged region such as cracks and burrs at the edge of groove could be improved by using achromatic focusing lenses. The singlet lens for focusing optics led to the large damaged region at the edge of groove, and the cracks and burrs appeared remarkably with increasing the pulse energy. The combination of singlet focusing lens and a circle mask to trim the laser beam made it possible to become the damaged region smaller, since the intensity distribution of laser beam could be sharpen at the edge by using the mask with an appropriate diameter hole.

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