NOVELTY - Manufacturing fuel cell (100) involves applying a sacrificial material periodically to a surface of an anode (102) substrate; applying a first gas diffusion layer to the sacrificial material; applying a first catalyst material (108) to the first gas diffusion layer; applying an electrolyte material to anode substrate and first gas diffusion layer with the first catalyst material; applying a second catalyst material to the electrolyte material on electrolyte material; applying a cathode (110) to the second gas diffusion layer; and removing the sacrificial material from anode substrate.    USE - For manufacturing fuel cell (claimed).    ADVANTAGE - The method improves the usefulness of fuel cells, provides fuel cell as a monolithic device with microstructures and thin and thick films optimized for high performance; and avoids failure of the fuel cell due to mechanical stresses encountered during operation such as due to swelling and contraction.    DETAILED DESCRIPTION - Manufacturing fuel cell (100) involves applying a sacrificial material periodically to a surface of an anode (102) substrate, where at least some areas of the anode substrate have no sacrificial material; applying a first gas diffusion layer to the sacrificial material; applying a first catalyst material (108) to the first gas diffusion layer; applying an electrolyte material to the anode substrate and the first gas diffusion layer with the first catalyst material, where a first surface of the electrolyte material is in operative association with the anode substrate and the first gas diffusion layer with the first catalyst material; applying a second catalyst material to the electrolyte material on a second surface of the electrolyte material, where a first surface of the second catalyst material is in contact with the second surface of the electrolyte material; applying a second gas diffusion layer to the electrolyte material with the second catalyst material (116); applying a cathode (110) to the second gas diffusion layer with the second catalyst material; removing the sacrificial material from the surface of the anode substrate to expose integrated gas channels for the anode substrate of a monolithically constructed fuel cell; perforating the cathode with through holes arrayed throughout the cathode; and laminating the second gas diffusion layer and the second catalyst material prior to the steps of applying the second catalyst material and the second gas diffusion layer. INDEPENDENT CLAIMS are included for following:    (1) printing a fuel cell having integrated gas channels involving printing a sacrificial material periodically to a surface of a metal anode substrate, where at least some portions of the metal anode substrate have no sacrificial material printed on it; printing or laminating a first gas diffusion layer to conform to a surface of the sacrificial material; infusing or coating a first catalyst material to the first gas diffusion layer; printing an electrolyte material onto the infused first applied catalyst material; infusing or coating a second catalyst material to the electrolyte material; printing or laminating a second gas diffusion layer onto the electrolyte material with the second catalyst material; applying a cathode to the second gas diffusion layer; and removing the sacrificial material, to form integrated gas channels of a monolithically formed fuel cell; and    (2) printed fuel cell having integrated gas channels comprising an anode layer; a first gas diffusion layer periodically fixed to the anode layer, where the periodically fixed first gas diffusion layer defines hydrogen flow field channels; a first catalyst material coated or infused to the first gas diffusion layer; an electrolyte membrane covering portions of the anode layer and the first gas diffusion layer with the first catalyst material; a second catalyst material coated or infused to the electrolyte membrane; a second gas diffusion layer in operative association with the electrolyte membrane and the second catalyst material, on a surface of the electrolyte membrane different from a surface of the electrolyte membrane which is in contact with the first gas diffusion layer; and a perforated cathode in contact with the second gas diffusion layer.    DESCRIPTION OF DRAWING(S) - The figure shows cross sectional view of hydrogen fuel cell.    Fuel cell (100)    Anode (102)    First catalyst material (108)    Cathode (110)    Second catalyst material (116)