NOVELTY - The fuel cell component manufacturing assembly comprises a support member configured to be situated adjacent to a fuel cell component (20) to provide support for the component, and a platen member having a configuration corresponding to a portion of the support member for being received against a portion of the component. The support member has a perimeter corresponding to a perimeter of the component. A temperature of the platen member is controllable to achieve a desired temperature of a material situated adjacent to the platen member.    USE - The assembly is useful for manufacturing a fuel cell component such as an electrode, a gas diffusion layer and a catalyst layer (all claimed).    ADVANTAGE - The assembly is capable of economically and reliably manufacturing the fuel cell component with reduced leakage of reactant gas and reduced risk of negatively affecting the component layer during the manufacturing process.    DETAILED DESCRIPTION - The fuel cell component manufacturing assembly comprises a support member configured to be situated adjacent to a fuel cell component (20) to provide a support for the component, and a platen member having a configuration corresponding to a portion of the support member for being received against a portion of the component. The support member has a perimeter corresponding to a perimeter of the component. A temperature of the platen member is controllable to achieve a desired temperature of a material situated adjacent to the platen member. The platen member has: a surface area that is less than a surface area of the component such that the portion of the component is subjected to pressure resulting from a force urging the platen member and the support member together with the component between the support member and the platen member; and a rectangular configuration. The support member has a rectangular configuration and a surface area that is less than the surface area of the component. The rectangular configurations are the same. Three sides of the platen member are situated to be aligned with three sides of the support member. The platen member configuration corresponds to an edge of the component. The platen member has a portion corresponding to each edge of the component. An INDEPENDENT CLAIM is included for a method for making a fuel cell component.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a phosphoric acid fuel cell component.    Fuel cell component (20)    Substrate layer (22)    Region of substrate layer. (24)