Patent ID: 8399178
Filing Date: 2013-03-19
Classification: G03F

Abstract:
1. A method for producing a relief image arrangement said relief image arrangement comprising a base layer and a layer of photosensitive material fixed on the base layer, wherein the layer of photosensitive material is selectively crosslinkable to create at least one screen point therein, the method comprising the steps of: providing a plurality of zones of the at least one photosensitive material for creating the at least one screen point; successively exposing the photosensitive material to modulated light energy to selectively crosslink the photosensitive material and form the at least one screen point therein, wherein the at least one screen point that is formed comprises a pyramidal shape having a smaller top surface and shoulders sloping away from the smaller top surface; wherein the at least one screen point is formed by the successive exposure of the photosensitive material to the modulated light energy comprising at least one laser in the zones of the at least one screen point and wherein the plurality of zones of the at least one screen point are exposed to different levels of light energy; wherein the at least one screen point is contacted with several back-and-forth passes of the laser; and wherein each successive exposure of the modulated light energy comprises a fraction of the energy necessary for the total crosslinking of the photosensitive material to modulate the total energy received at each point of the relief image arrangement.