Laser cutting and sealing methods of capillary glass tube

Gi-Jung Nam; Meong-Hui Seo; Kwang-Hyun Ryu; Sung-Wook Moon; Yun-Suk Hong; Dong-Seob Ko

doi:10.1117/12.596305

8 October 2004 Laser cutting and sealing methods of capillary glass tube

Gi-Jung Nam, Meong-Hui Seo, Kwang-Hyun Ryu, Sung-Wook Moon, Yun-Suk Hong, Dong-Seob Ko

Proceedings Volume 5662, Fifth International Symposium on Laser Precision Microfabrication; (2004) https://doi.org/10.1117/12.596305
Event: Fifth International Symposium on Laser Precision Microfabrication, 2004, Nara, Japan

Abstract

Cutting and sealing methods of quartz and borosilicate capillary glass-tube using CO₂ laser have been investigated. Conventional cutting and sealing glass tube have been done independently from each other. In this study, cutting and sealing processes of glass tube with 1.4 mm outer diameter and 0.25 mm thickness are done simultaneously. Key parameters of laser glass-tube cutting and sealing are laser power, laser spot-size, exposure time and rotation speed of glass tube. Also, the gas pressure-difference between the inside and the outside of glass tube plays a pivotal role in determination of cutting quality. Laser power required for sealing of quartz tube is about 3 times higher than that of borosilicate tube. However, the cutting power of borosilicate tube is slightly higher than that of quartz tube. A clean cut requires 2 or 3 times of rotation within 0.7 sec exposure-time. A proper spot-size of laser should be irradiated on the surface of glass tube, to obtain an enough melting volume for sealing. Differences of cutting and sealing quality beween quartz and borosilicate tubes have been presented in this article.

Citation Download Citation

Gi-Jung Nam, Meong-Hui Seo, Kwang-Hyun Ryu, Sung-Wook Moon, Yun-Suk Hong, and Dong-Seob Ko "Laser cutting and sealing methods of capillary glass tube", Proc. SPIE 5662, Fifth International Symposium on Laser Precision Microfabrication, (8 October 2004); https://doi.org/10.1117/12.596305

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