Patent ID: 8808790

Claim:
A process for manufacturing a submillimetric electroconductive grid coated with an overgrid on a main face of a substrate comprising: producing a network mask having submillimetric openings on the main face, the producing including: depositing a masking layer from a solution of colloidal polymeric nanoparticles that are stabilized and dispersed in a solvent, the polymeric nanoparticles having a glass transition temperature T g ; and drying the masking layer at a temperature below said temperature T g until the network mask having a network of openings is obtained, the openings separating mask zones with substantially straight edges in the network mask; forming the electroconductive grid from the network mask, the forming comprising depositing at least one electroconductive grid material until a fraction of the depth of the openings is filled; heat treating the masking layer with the electroconductive grid material at a temperature greater than or equal to 0.8 times T g , resulting in a shrinkage of the mask zones, thus creating a space between the edges of the mask zones and lateral edges of the grid; forming the overgrid on the grid, the forming of the overgrid comprising depositing an overlayer, made of an overlayer material, on the grid and in the space between the edges of mask zones and the lateral edges of the grid; removing the masking layer, until the electroconductive grid coated with the overgrid is revealed.