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HomeKey Engineering MaterialsKey Engineering Materials Vol. 871Effect of Laser Processing Parameters on Microhole...

Effect of Laser Processing Parameters on Microhole Quality of Aluminium Nitride Ceramics

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Abstract:

A picosecond laser in spin-cutting mode was used to drill 500μm diameter microholes on 150μm thick aluminium nitride ceramic. The effects of laser processing parameters such as the laser power, scanning speed, and defocus amount on the microhole quality were studied. The results show that as the laser power increases, the inlet and outlet diameters of the holes increase, the taper decreases slightly, and the thickness of the recast layer decreases evidently. The scanning speed has no obvious effect on the diameter and taper of the hole; however, the hole can not be drilled through when the speed is too large. Positive defocus can effectively reduce the taper of the hole. Under 28.5W laser power, 400Hz frequency, 200mm/s scanning speed, and zero defocus amount conditions, high-quality microholes with a taper of 0.85° were obtained.

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Advanced Materials, Processing and Testing Technology II

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Periodical:

Key Engineering Materials (Volume 871)

Pages:

277-283

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.871.277

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Online since:

January 2021

Authors:

Chun Yan Yang, Yun Hao, Bozhe Wang, Hai Yuan, Liu Hui Li*

Keywords:

Aluminum Nitride Ceramic, Laser Processing, Microhole Quality

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© 2021 Trans Tech Publications Ltd. All Rights Reserved

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