Patent ID: 7049019

Claim:
A fuel cell comprising a pair of separators and electrolyte electrode assemblies interposed between said separators, said electrolyte electrode assemblies each including an anode, a cathode, and an electrolyte interposed between said anode and said cathode, wherein each of said separators includes a first plate and a second plate stacked together; said electrolyte electrode assemblies are interposed between one of said separators having said first and second plates and the other of separators having said first and second plates; a fuel gas channel for supplying a fuel gas to said anode, and an oxygen-containing gas channel for supplying an oxygen-containing gas to said cathode are formed between said first and second plates which are jointed together; a first ridge is formed on said first plate, and a second ridge is formed on said second plate, and said first ridge and said second ridge protrude away from each other to form said oxygen-containing gas channel between said first ridge and said second ridge; said first plate includes a first outer projection and a first inner projection on opposite sides of said first ridge; said second plate includes a second outer projection and a second inner projection on opposite sides of said second ridge; and said first outer projection and said first inner projection protrude oppositely to said first ridge, and said second inner projection and said second outer projection protrude oppositely to said second ridge such that said first outer projection and said second outer projection are in contact with each other, and said first inner projection and said second inner projection are in contact with each other.