Patent ID: 7081316

Claim:
A flow field plate for use in a fuel cell of the type having a thin plate including an inlet margin having an inlet header formed therethrough, an exhaust margin having an exhaust header formed therethrough, and a first major face having a flow field formed therein, said flow field defined by a plurality of flow channels, each of said plurality of flow channels comprising: an inlet leg including a first longitudinal portion in fluid communication with said inlet header and a first transverse portion; a serpentine leg having a first end in fluid communication with said first transverse portion and a second end; and an exhaust leg having a second transverse portion in fluid communication with said second end of said serpentine leg and a second longitudinal portion in fluid communication with said first exhaust header; wherein said inlet legs of each of said plurality of flow channels are of equal length, said serpentine legs of each of said plurality of flow channels are of equal length, and said exhaust legs of each of said plurality of flow channels are of equal length.