We have developed a highly accurate differential deposition system for the fabrication of X-ray optical devices. Using this system, thin films having a thickness distribution gradually changing along the longitudinal direction on a substrate surface could be produced with sub-nanometer accuracy. The surface flatness of the deposited films was confirmed by atomic force microscopy observation, and the surface was sufficiently smooth to prevent X-ray scattering on the mirror surface. A demonstration of differential deposition was performed and a Pt thin film having the desired thickness profile was successfully deposited on a 100 mm long substrate.
All Science Journal Classification (ASJC) codes
- Physical and Theoretical Chemistry
- Colloid and Surface Chemistry