Microfluidic switch to temporarily stop a flow of liquid

摘要

The micro-fluid switch (1), to block a fluid flow for a time span, has at least one initial channel (3) together with at least one second channel (4), with a common end section (6) and a common or separate entry section (5). The micro-fluid switch (1), to block a fluid flow for a time span, has at least one initial channel (3) together with at least one second channel (4), with a common end section (6) and a common or separate entry section (5). A micro-valve (20) acts as a capillary stop at the end section of the first channel, which is given an abrupt change in its geometry or surface characteristics, which is controlled for the fluid flow in the second channel to restore the flow in the first channel. Hollow zones (3b,4b) contain reagents.