Thin diblock copolymer films on patterned surfaces: Computer simulations and the Frenkel-Kontorowa model

We study by direct numerical integration of the dynamical evolution equatio n the equilibrium configuration of a diblock copolymer thin film melt on a patterned surface. The surface has a large number of stripes and the mismat ch between the bulk diblock spacing and the stripe width is small. We inves tigate primarily the formation of small discommensurations in the incommens urate phase and compare the results with the predictions of an analogous mo del of solid-state physics, the Frenkel-Kontorowa model. [S1063-651X(99)138 11-X].