  We present few ordering mechanisms in block copolymer melts in the
coarse-graining approach. For chemically homogeneous or modulated confining
surfaces, the surface ordering is investigated above and below the
order-disorder temperature. In some cases the copolymer deformation near the
surface is similar to the copolymer morphology in bulk grain boundaries. Block
copolymers in contact with rough surfaces are considered as well, and the
transition from lamellae parallel to perpendicular to the surface is
investigated as a function of surface roughness. Finally, we describe how
external electric fields can be used to align block copolymer meso-phases in a
desired direction, or to induce an order-order phase transition, and dwell on
the role of mobile dissociated ions on the transition.
