A composition for forming a radiation absorbing coating which comprises an organic solvent, a radiation absorbing polymer or a radiation absorbing material dissolved therein and a crosslinking agent having blocked isocyanate groups. The carrier includes a substrate and a metal layer. A partition is arranged so as to face the projections of the surface of the dielectric layer for ensuring a ventilation path for exhausting air. Related computer system and computer program products for implementing the method are also described.