TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Method: The method further comprises: applying a porous reinforcement layer (133) on the nonporous layer solution; drying the first porous layer solution and the nonporous layer solution to form a first porous layer and a nonporous layer; drying the first porous layer solution, the nonporous layer solution, and the porous reinforcement layer to form a first porous layer on the substrate, a non-porous layer on the first porous layer, and the porous reinforcement layer on the non-porous layer; drying the microporous layer solution, the first porous layer solution and the non-porous layer solution to form a microporous layer, a first porous layer and a nonporous layer; drying the first porous layer solution, the non-porous layer solution, and the second porous layer solution to form a first porous layer, a non-porous layer, and a second porous layer; and drying the cathode substrate and the anode substrate. The second porous layer solution is simultaneously coated on the non-porous layer solution, where the second porous layer solution comprises an electrode ink. The first porous layer solution is simultaneously coated on a microporous layer solution, and the microporous layer is simultaneously coated on the substrate. The solutions are simultaneously coated using a slot die coating, a slide coating, a curtain coating and/or roll coating.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The substrate is gas diffusion media. The electrode ink comprises at least one solvent, ionomer or a catalyst. The membrane solution comprises at least one solvent and an ionomer. The laminar flow has a Reynolds number of less than 50. The microporous layer solution comprises solvent comprising an organic solvent and/or water, carbon particles and hydrophobic polymer comprising PTFE, polyvinylidene fluoride and/or fluoroethylene propylene. The laminar flow has a Reynolds number of less than 50. EXAMPLE - On the surface of a piece of gas diffusion media microporous solution (prepared by adding 480 g spherical zirconia milling media, 10.29 g Pure Black SCD205-110 (RTM: Superior graphite grade) and 2.06 g Ultraflon 8TA (RTM: PTFE) (sintered at 300 degrees C for 45 minutes) to 500 ml polyethylene bottle and shaking, adding 55.86 g water, 31 g n-propanol, 11.44 g nitrous acid and 9.35 g Nafion DE2020 (RTM: Perfluorinated resin solution), 21.4 wt.% solids, 33.1 wt.% water and 45.5 wt.% n-propanol, and placing on ball mill), cathode ink (prepared by adding 16.89 g platinum on graphitized vulcan carbon catalyst and 520 g zirconia milling media to polyethylene bottle, adding 10.7 g n-propanol, 39 g diacetone alcohol and 4.8 g water in second bottle, mixing, adding solution in second bottle to catalyst and milling media in first bottle and shaking, adding to first bottle 58.6 g Nafion DE2020 (RTM: Perfluorinated resin solution), 21.4 wt.% solids, 33.1 wt.% water and 45.5 wt.% n-propanol and placing bottle on a ball mill) and membrane solution (comprising Nafion DE2020 (RTM: Perfluorinated resin solution), 21.4 wt.% solids, 33.1 wt.% water and 45.5 wt.% n-propanol) were coated under laminar flow onto the gas diffusion media substrate using a slot die to form a wet composite structure.