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Proceedings Paper

Characterization of modified surface of indium tin oxide film during process of laser patterning
Author(s): JiNan Zeng; Hwee Lin Koh; ZhongMin Ren; Wen Dong Song; Yongfeng Lu
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Paper Abstract

Effect of excimer laser irradiation at different fluences on Indium-Tin-Oxide films has been studied with the use of optical transmission, XRD, Mirco-Raman spectra and XPS. Surface modification at low fluence of 154mJ/cm2 is observed to cause the increase of optical transmittance at initial several pulses of UV laser. At moderate fluence of 239mJ/cm2, UV laser irradiation results in apparent coloration and chemical compositional change on the ITO surface. XRD results show the grain size of ITO tends to decrease after irradiation. Novel features appear in Raman spectra, which involve the change of surface crystallinity and composition induced by UV laser irradiation. XPS analysis indicates peak shape of O bond is modified post irradiation and Sn/In ratio presents maximum corresponding to dark coloration. ITO films have also been patterned at high fluence of 1-2J/cm2 using simple masks. The ablation rate on laser pulse demonstrates linear change. An alternative method for laser patterning is proposed by the combination of excimer laser coloration and visible laser patterning.

Paper Details

Date Published: 25 February 2002
PDF: 4 pages
Proc. SPIE 4426, Second International Symposium on Laser Precision Microfabrication, (25 February 2002); doi: 10.1117/12.456855
Show Author Affiliations
JiNan Zeng, National Univ. of Singapore (Singapore)
Hwee Lin Koh, National Univ. of Singapore (Singapore)
ZhongMin Ren, Data Storage Institute (Singapore)
Wen Dong Song, Data Storage Institute (Singapore)
Yongfeng Lu, National Univ. of Singapore (United States)


Published in SPIE Proceedings Vol. 4426:
Second International Symposium on Laser Precision Microfabrication

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