Patent ID: 7638098

Claim:
Microfluidic system, comprising a microfluidic network with a microstructure carrier with at least one channel and at least one microfluidic hollow fiber, one end of which is disposed in the at least one channel so as to be able to discharge into the channel, outside dimensions of the at least one hollow fiber being matched to the inside dimensions of the at least one channel in a manner forming capillary channels between the at least one hollow fiber and walls of the at least one channel, the network being covered with a cover film or plate which is fixed on the microstructure carrier and which closes the at least one channel, wherein the capillary channels are filled with a fluidically sealing cement up to a capillary stop structure in the area of the end of the hollow fiber in the channel, penetration of the cement in the liquid state into the end of hollow fiber having been prevented by the capillary stop structure; wherein the capillary stop structure is formed by a channel section forming a trapezoidal widening on the outer end of said at least one channel that is wider than said at least one channel and into which the end of the hollow fiber extends.