Figure 3
From: A New Strategy of Lithography Based on Phase Separation of Polymer Blends
Top view of SEM images of PS porous film with different polymer blend concentration.
(a) 5 wt%; (b) 4 wt%; (c) 3 wt% and (d) 2 wt%. The initial PS/PEG weight ratio was set at 2:3 and the spin speed was 3000 r∙min–1.
