Patent ID: 8399151

Claim:
A fuel cell formed by stacking an electrolyte electrode assembly and a metal separator in a form of a corrugated plate in a stacking direction, the electrolyte electrode assembly including a pair of electrodes and an electrolyte interposed between the electrodes, a reactant gas flow field as a passage of a fuel gas or an oxygen-containing gas being formed on one surface of the metal separator, a fluid flow field as a passage of the fuel gas, the oxygen-containing gas, or a coolant being formed on another surface of the metal separator, the metal separator comprising: a first buffer that includes a linear guide protruding from an intermediate height area toward the reactant gas flow field to form a continuous guide flow field, the continuous guide flow field guiding a fuel gas or an oxygen-containing gas from the first buffer to the reactant gas flow field; and a second buffer protruding from the intermediate height area toward the fluid flow field to form an embossed flow field.