  We investigate the ordered morphologies occurring in thin-films diblock
copolymer. For temperatures above the order-disorder transition and for an
arbitrary two-dimensional surface pattern, we use a Ginzburg-Landau expansion
of the free energy to obtain a linear response description of the copolymer
melt. The ordering in the directions perpendicular and parallel to the surface
are coupled. Three dimensional structures existing when a melt is confined
between two surfaces are examined. Below the order-disorder transition we find
tilted lamellar phases in the presence of striped surface fields.
