Fuel cell and method for manufacturing fuel cell

A fuel cell and a method for manufacturing a fuel cell are presented. The method comprises providing at least one substrate (202) and disposing a plurality of fuel cell component layers (204) on the substrate (202) by at least one physical vapor deposition (PVD) process. Each layer of the plurality comprises an edge bordering the layer (304). The fuel cell unit comprises at least one substrate (202); a plurality of fuel cell component layers (204) disposed on the substrate (202), wherein each layer (204) of the plurality comprises an edge bordering the layer (304); and at least one dense layer of material disposed over at least a portion of the edge of at least one fuel cell component layer. The at least one dense layer seals at least the aforementioned portion of the edge.