Sputtered-sliced fabrication of kinoform zone plate for hard X-ray focusing M. Yasumoto, S. Tamura, N. Kamijo, Y. Suzuki, M. Awaji, A. Takeuchi and H. Takano J. Phys. IV France, 104 (2003) 189-192 DOI: 10.1051/jp4:200300058