Reel-to-Reel method for making membrane electrode assemblies. A first catalyst is deposited in a repeating cell pattern on a first side of a proton exchange membrane film. A second catalyst is deposited on the back side of the proton exchange membrane. An electron conductor material is deposited on a support film which is adhered by means of an adhesive film to the proton exchange membrane film. The various layers are aligned and laminated together to form the membrane electrode assembly.

 
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