Patent ID: 8795607

Claim:
A microfluidic cartridge ( 22 ) for metering a liquid into a channel, comprising: a plate shaped substrate ( 17 ) which has a through-flow opening ( 18 ), a chamber ( 4 ) tightly sealed by a first film ( 3 ), the first film ( 3 ) being arranged at a first side of the through-flow opening ( 18 ), and wherein the chamber ( 4 ) is formed by a container ( 1 ) which is encapsulated by the first film ( 3 ) and whereby the container ( 1 ) is attached via a surface of the first film ( 3 ) to the substrate ( 17 ), and a second film ( 7 ) arranged at a second, opposite, side of the through-flow opening ( 18 ), wherein the second film ( 7 ) forms a channel ( 40 ) with the substrate ( 17 ) and the first and second films differ in respective tear strength such that when pressure is applied simultaneously to both the first and second films, the first film ( 3 ) tears while the second film ( 7 ) deforms elastically and/or plastically.