Patent ID: 7055540

Claim:
A method of moving a fluid in a capillary using a capillary chip having a layer comprising a polymer composition and a capillary formed on the surface or inside of said layer comprising a polymer composition, wherein said capillary has a movement control part, and said movement control part comprises multiple and sequential opening/closing parts; said opening/closing part blocks movement of the fluid that flows in said capillary by increase in the volume of said polymer composition to result in the closed state, while it permits movement of the fluid that flows in said capillary by decrease in the volume of said polymer composition to result in the open state; and said method of moving the fluid comprises: step (a) of switching said multiple opening/closing parts from the open state to the closed state sequentially in a movement direction by changing the temperature of said polymer composition in said movement control part, thereby moving the fluid in said capillary.