  We investigate the morphology of diblock copolymers in the vicinity of flat,
chemically patterned surfaces. Using a Ginzburg-Landau free energy, spatial
variations of the order parameter are given in terms of a general
two-dimensional surface pattern above the order-disorder transition. The
propagation of several surface patterns into the bulk is investigated. The
oscillation period and decay length of the surface $q$-modes are calculated in
terms of system parameters. We observe lateral order parallel to the surface as
a result of order perpendicular to the surface. Surfaces which has a finite
size chemical pattern (e.g., a stripe of finite width) induces lamellar
ordering extending into the bulk. Close to the surface pattern the lamellae are
strongly perturbed adjusting to the pattern.
