Micro-pump or normally-off micro-valve

摘要

The invention relates to a micro valve for use in a biosensor, a micro fluidic device, use of such a device, and a micro fluidic element. Biosensors are used for detection of molecules and/or ions, such as protein, drug, DNA, RNA, hormone, glucose, insulin, enzyme, fungus, bacterium, etc., in a biological sample. The sensor can be used for diagnostic application, but for instance also drugs, either therapeutic or abuse, may be detected in for instance blood, urine and saliva.

主权项

1. A normally closed micro-valve for use in a microfluidic device, comprising
a valve seat; an outlet opening; an inlet; and flexible pre-compressed or pre-stretched separator arranged so that the pre-compression or pre-stretch forces the separator against the valve seat in a normally closed state to isolate the outlet opening from the inlet, the separator being a non-perforated membrane and configured to be removed from the valve seat when a vacuum force is applied onto the separator.