Separator assembly for fuel cell and method for manufacturing separator assembly for fuel cell

A separator assembly for a fuel cell applied to a fuel cell stack configured by single cells laminated in a laminating direction, each of the single cells including a membrane electrode assembly, a first separator having a base made of a metal plate and arranged on an anode side of the membrane electrode assembly, and a second separator having a base made of a metal plate and arranged on a cathode side of the membrane electrode assembly, the separator assembly comprising:

• the first separator;
• the second separator, wherein the first separator and the second separator are adjacent to each other in the laminating direction;
• and
• a joined portion where the first separator and the second separator are joined to each other through laser welding, wherein
• the first separator includes a first surface that is intended to be opposed to the membrane electrode assembly,
• the first surface of the first separator includes an exposed portion where the base of the first separator is exposed,
• the second separator includes a second surface that is intended to be opposed to the membrane electrode assembly,
• a film including conductive particles is arranged on the entire second surface of the second separator, and
• the joined portion is formed by irradiating the exposed portion of the first separator with laser.