Electrical microvalve and method of manufacturing thereof

B - Operations – Transporting – 81 – C

Patent

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Details

B81C 1/00 (2006.01) B81B 5/00 (2006.01) B81B 7/00 (2006.01) G01N 37/00 (2006.01)

Patent

CA 2703801

The present invention relates to a microvalve for controlling a fluid flow in a microchannel, to a microfluidic circuit using the microvalve, and to a manufacturing method thereof. The microvalve has a first electrode located on a portion of the microchannel, a second electrode over the microchannel and substantially aligned with the first electrode forming a membrane with substantially no resilience. In function, upon application of an electric force on the first and second electrodes, the second electrode draws nearer the first electrode, thus obstructing the microchannel. The microfluidic circuit comprises multiple microchannels and at least one microvalve affixed to one of the multiple microchannels, wherein the at least one microvalve is adapted to indirectly actuate a flexible valve adapted to regulate a flow of fluid in another one of a multiplicity of microchannels.

La présente invention porte sur une microsoupape pour commander un écoulement de fluide dans un microcanal, sur un circuit microfluidique utilisant la microsoupape et sur un procédé de fabrication de ceux-ci. La microsoupape a une première électrode située sur une partie du microcanal, une seconde électrode sur le microcanal et sensiblement alignée avec la première électrode formant une membrane sensiblement sans aucune résilience. En fonctionnement, lors de l'application d'une force électrique sur les première et seconde électrodes, la seconde électrode est amenée à s'approcher de la première électrode, obstruant ainsi le microcanal. Le circuit microfluidique comprend de multiples microcanaux et au moins une microsoupape fixée à l'un des multiples multicanaux, la ou lesdites microsoupapes étant conçues pour actionner de façon indirecte une soupape souple conçue pour réguler un écoulement de fluide dans un autre microcanal d'une multiplicité de microcanaux.

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