High Quality Fiber Laser Cutting of Electronic Alumina Ceramics
In this paper, high quality cutting of 1 mm dense Al2O3 electronic ceramic processed by a fiber laser with spot diameter of 15 μm was reported. The narrow kerf with 30μm width was obtained with laser power of 100 W. 300 W is the laser power threshold of the kerf enlargement. Under higher laser power, the ceramics can be damage-free cut with higher cutting speed. Striation-free cutting could be achieved at 1000 W laser power with a cutting speed of 350 mm/s. The ratio of cutting speed to laser power for striation-free cutting was determined as 0.35. The black cutting surface was due to the mass tetragonal alumina induced by N2 as assist gas.
Zhengyi Jiang, Xianghua Liu and Jinglong Bu
X. C. Chen et al., "High Quality Fiber Laser Cutting of Electronic Alumina Ceramics", Advanced Materials Research, Vols. 154-155, pp. 917-922, 2011