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Micro-cutting with diamond tool micro-patterned by femtosecond laser

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Abstract

The demand for micro-scale surface machining has been steadily increasing, and various methods have been introduced. Among these, microcutting with a diamond tool removes material by making multiple cutting passes. However, many passes are needed to generate micropatterns over a large area. To overcome the drawbacks of this time-consuming process, we propose a novel method, which uses a micropatterned diamond tool. A 220-fs-pulsed Ti: Sapphire laser is used to create micropatterns on the edge line of a rectangular diamond tool. A six-axis motion stage is used to align the edge line and flank surface of the diamond tool with respect to the focal point of the laser beam. Using a simple laser direct-writing method and a 100× objective lens (NA: 0.8), lines ≤ 2 μm in width, 20 μm in length, and 10 μm in separation were fabricated along the 1-mm edge line of a bulk diamond tool. The micropatterned diamond cutting tool was then used to successfully produce micropatterns on the surface of nickel (Ni)-electroformed on SKD-61. This novel process provides an efficient means of multiple micropattern generation for molding applications, such as those required for optics and biotechnology, using only a single pass of a diamond cutting tool.

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Correspondence to Jaegu Kim.

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Kim, J., Je, TJ., Cho, SH. et al. Micro-cutting with diamond tool micro-patterned by femtosecond laser. Int. J. Precis. Eng. Manuf. 15, 1081–1085 (2014). https://doi.org/10.1007/s12541-014-0440-8

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  • DOI: https://doi.org/10.1007/s12541-014-0440-8

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