Cell Positioning Culture Chip Based on Functional Micro Topological Substrate Chenghua Sa, Yan Xue, Chen Wei, Haobin Liang, Li Xie and Fang Ye JNWPU, 38 1 (2020) 139-146 Published online: 12 May 2020 DOI: 10.1051/jnwpu/20203810139