Effect of substrate curvature on thickness distribution of polydimethylsiloxane thin film in spin coating process*

Project supported by the National Natural Science Foundation of China (Grant Nos. 51605079 and 51475076), the Science Fund for Creative Research Groups of the National Natural Science Foundation of China (Grant No. 51621064), and the China Postdoctoral Science Foundation (Grant No. 2016M591424).

Yan Ying, Zhou Ping, Zhang Shang-Xiong, Guo Xiao-Guang, Guo Dong-Ming
       

(color online) Film thickness distribution along the radial direction on a convex substrate (center deformation 250 μm/400 μm) at the spin speed of 1000 rpm, 3000 rpm, 5000 rpm. The substrate center is set as the zero point of x axis.