A Fresnel zone plate (FZP) with 35nm outermost zone width has been fabricated and tested in the hard X-ray region. The FZP\r\nwas made by electron beam lithography and reactive ion etching technique. The performance test of the FZP was carried out\r\nby measuring the focused beam profile for coherent hard X-ray beam at the beamline 20XU of SPring-8. The full width at half\r\nmaximum of the focused beam profile measured by knife-edge scan method is 34.9 �± 2.7 nm, that agrees well with the theoretical\r\nvalue of diffraction-limited resolution. Applications to scanning microscopy were also carried out.
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