TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred Cell: The fuel cell has gas inlet area and gas outlet area with greater hydrophobic polymer loading adjacent or in gas outlet area.    TECHNOLOGY FOCUS - POLYMERS - Preferred Method: (M1) involves delivering 1 - 20 (preferably 2 - 15 especially 4 - 10) wt.% polyetrafluoroethylene onto the carbon fiber paper based. (M1) Involves contacting the porous sheet material material on one side only with the pattern member or on both sides with pattern member. The contacting step comprises holding the sheet between two mold surfaces such that at least one mold surface comprises openings through which the solvent can evaporate. Evaporating is accomplished by heating the sheet to remove solvent. The pattern comprises 50-99% coverage by the hydrophobic polymer on the porous sheet material and is in the form of screen. Preferred Components: The hydrophobic polymer comprises a fluorocarbon polymer (e.g. polytetrafluoroethylene). The polymer comprises fluorocarbon and the solvent comprises water. The solution is an aqueous emulsion comprising 1 - 10 (preferably 1 - 5 wt.%) in the form of particles. The fluorocarbon comprises polytetrafluoroethylene. One mold surface comprises openings, and the other mold surface is solid. Both mold surfaces comprise openings, and a pattern of fluorocarbon polymer is deposited on both sides of the sheet. The porous sheet material comprises carbon fiber paper having porosity greater than 50%. At least one side of the sheet is coated over 10 - 90 (preferably 10-60 especially 10-50) % of its area with fluorocarbon polymer. The screen comprises openings that make up 10-90 (preferably 10 - 60 especially 1 - 40) % of the area of the screen. EXAMPLE - A pattern member in the form of screen was provided having a series of holes in a stainless steel sheet such that the area of the holes makes up about 20 to 63% of the total surface area of the pattern member. A sheet of carbon fiber paper was soaked in a solution of polytetrafluoroethylene (PTFE) (3 wt %) for 4 minutes. The carbon fiber paper was then placed in contact with the pattern member and dried at 120degreesC for 0.5 hours. At this point, there was approximately 8.2 wt.% uptake, which was generally made of PTFE and surfactants in the commercial solution. After solvent removal, the paper was removed from contact with the pattern member and cured at 380degreesC for 20 minutes. After the curing step, there remained approximately a 7 wt.% uptake of PTFE. An electrochemical fuel cell was prepared in which the anode catalyst layer was in contact with a sheet of Toray TGPH-060 carbon fiber paper containing 7 wt.% PTFE applied without use of a pattern member. In three different cells, a diffusion medium was provided adjacent to the cathode that contains 1) no pattern of PTFE but containing 7 wt.% total of PTFE, 2) a carbon fiber paper containing 7 wt.% PTFE with mirrored patterns on both sides of the paper, and the PTFE covers 37% of the area of the paper and are present as dots of 0.045 inch diameter; and 3) a carbon fiber paper having 7 wt.% PTFE with mirrored patterns on both sides, the PTFE covers about 63% of the area of the paper and was present as dots of 0.156 inch diameter. A first experiment was carried out to evaluate gas diffusion media performance under fairly dry conditions conducted on a single-cell fuel cell with 50 cm2 active area. The cells having the patterned diffusion media have equivalent performance to the cell provided with a diffusion medium having PTFE but with no pattern.