The Study of High Speed Micro-Drilling Performance and Machining Quality of Coated Micro-Drills with Zr-C:H Coatings


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The Zr-C:H coatings with various C2H2 flow rate were deposited on micro-drills (a diameter of 0.2 mm) used a closed field unbalanced magnetron sputtering system. The ultrahigh speed (drilling speed of 160000 rpm) through-hole drilling printed circuit board tests used to evaluate the drilling performance of the coated micro-drills. The rejection criteria of service lives of the coated micro-drills were evaluated using two different criteria: (1) a nail head ratio greater than 1.5; (2) a drilled hole surface roughness greater than 25.4 μm. Adopting a service life criterion of a nail head ratio of 1.5, the Zr-C:H-5 coating possesses the optimal high-speed machining performance, which yields a micro-drill lifetime of above 6000 drilled holes. It represents a three-fold improvement on that of an uncoated micro-drill and it also improves machining quality.



Advanced Materials Research (Volumes 591-593)

Edited by:

Liangchi Zhang, Chunliang Zhang, Jeng-Haur Horng and Zichen Chen




W. H. Kao et al., "The Study of High Speed Micro-Drilling Performance and Machining Quality of Coated Micro-Drills with Zr-C:H Coatings", Advanced Materials Research, Vols. 591-593, pp. 342-346, 2012

Online since:

November 2012




[1] H. Ronkainen, S. Varjus, J. Koskinen, K. Holmberg: Wear Vol. 249 (2001), p.260.

[2] C. Charitidis, S. Logothetidis: Thin Solid Films Vol. 482 (2005), p.120.

[3] C. Corbella, M. Rubio-Roy, E. Bertran, et al.: Diamond Relat. Mater. Vol. 18 (2009), p.1035.

[4] E. Konca, Y.T. Cheng, A.T. Alpas: Diamond Relat. Mater. Vol. 15 (2006 ), p.939.

[5] James C. Sung, Ming-Chi Kan, Michael Sung: Int. Journal of Refractory Metals & Hard Materials Vol. 27 (2009), p.421.


[6] D. Sheeja, B.K. Tay, S. M Krishnan, L.N. Nung: Diamond Relat. Mater. Vol. 12 (2003), p.1389.

[7] Yan Xingbin, Xu Tao, Chen Gang, Yang Shengrong, Liu Huiwen: Applied Surface Science Vol. 236 (2004), p.328.

[8] B. Podgornik, J. Vižintin: Surf. Coat. Technol Vol. 200 (2005), p. (1982).

[9] Vanhulsel, F. Velasco, R. Jacobs, L. Eersels, D. Havermans, E.W. Roberts, I. Sherrington, M.J. Anderson, L. Gaillard: Tribology International Vol. 40 (2007), p.1186.


[10] S. Yang, D. Camino, A.H. S Jones, Teer D G: Surf. Coat. Technol Vol. 124 (2000), p.110.

[11] V.N. Inkin, G.G. Kirpilenko, A.A. Dementjev, K.I. Maslakov: Diamond Relat. Mater. Vol. 9 (2000), p.715.

[12] S. Miyake, T. Saito, Y. Yasuda, Y. Okamoto, M. Kano: Tribology International Vol. 37 (2004), p.751.

[13] M. Kalin, J. Vižintin: Thin Solid Films Vol. 515 (2006), p.2734.

[14] Nanofilm International Technologies Pte. Ltd. : http/www. nanofilm. com. sg.