Patent ID: 8018128

Claim:
A microchannel structure with a fine flow path through which a fluid flows, comprising: a wavy plate member fabricated into a wavy form; an external peripheral wall member that surrounds the wavy plate member; a spacer that ensures a spacing between opposed portions of the wavy plate member; and a pair of notch structures, each having an outer wall section arranged to prevent lateral movement of the wavy plate member with respect to a direction of flow, each notch structure having a pair of end portions extending laterally inwardly toward the wavy plate member and arranged to prevent longitudinal movement of the wavy plate member with respect to the direction of flow; wherein the fine flow path is defined by the wavy plate member and the external peripheral wall member; the pair of notch structures are formed in the external peripheral wall member along the direction of flow of the fluid; and two end portions of the wavy plate member are fit in the paired notch structures.