Journal of Vacuum Science & Technology B, Vol.11, No.6, 2373-2377, 1993
Multiple Beam-Shaping Diaphragm for Efficient Exposure of Gratings
The variable-shaped beam principle has some advantages over Gaussian beams in terms of throughput. The multiple beam-shaping diaphragm concept offers additional capabilities and further increase of throughput. The fabrication procedure of the diaphragm blades are described. We used the multiple beam-shaping diaphragm in ZBA 31/32 from JENOPTIK for efficient exposure of gratings with critical dimension down to 150 nm.