Patent ID: 7445754

Claim:
A device for controlling fluid using surface tension of the fluid, comprising: at least one storage chamber to which a fluid is injected and stored; at least one reaction chamber in which a predetermined reaction occurs on the fluid; at least one supply channel, each supply channel communicating fluid from each storage chamber to the at least one reaction chamber; at least one exhaust chamber in which fluid used as a result of the reaction is exhausted; at least one exhaust channel, each exhaust channel communicating used fluid from each reaction chamber to the at least one exhaust chamber; a first capillary stop valve located in each supply channel between the at least one storage chamber and the at least one reaction chamber; a second capillary stop valve located in each exhaust channel between the at least one reaction chamber and the at least one exhaust chamber; at least one side connecting channel connecting the first capillary stop valve to the second stop valve, wherein the capillary stop valves stop the flow of the fluid in each supply channel and exhaust channel using the surface tension of the fluid, and wherein a flow of fluid through the side connecting channel opens the capillary stop valves; at least one flow delay part formed within said side connecting channel and delays flow of the fluid by the surface tension of the fluid; and wherein said fluid moves from said storage chamber to said reaction chamber and exhaust chamber using only surface tension and the fluid in said reaction chamber is replaced by a different fluid.