Patent ID: 8642226

Claim:
A separator for fuel cell, comprising: a first flow path-forming portion having a corrugated cross-sectional shape including a first groove concave to a first surface to form a flow path for a first fluid on the first surface and a second groove concave to a second surface to form a flow path for a second fluid on the second surface, which are arranged alternately, the first flow path-forming portion comprising at least three linear areas parallel to one another, each including a plurality of the first grooves and a plurality of the second grooves, and plural turned areas, each including a plurality of the first grooves and a plurality of the second grooves to connect between corresponding grooves in adjacent linear areas, and thereby forming serpentine flow paths for the second fluid; and second flow path-forming portions provided adjacent to an inlet position and an outlet position of the flow paths for the second fluid in the first flow path-forming portion, each of the second flow path-forming portions forming a connection flow path to connect between flow paths for the first fluid on the first surface and forming a connection flow path to connect between the flow paths for the second fluid on the second surface, wherein each of the second grooves in each of the turned areas has a shallower groove portion having less depth from the second surface than depth of a remaining portion, so that a connection flow path is formed on the first surface to connect two adjacent flow paths for the first fluid across the shallower groove portion, wherein the first grooves are alternated with the second grooves, and wherein the flow paths for the second fluid are separated from each other.