US Patent 9079179 Microfluidic device comprising sensor

A microfluidic device for performing detection of a substance in a liquid sample includes a cavity (24) formed above a sensor surface area (22) of a sensor (18). The cavity (24) extends at the first side of a base plate (10) from a first area (32), where the cavity overlaps a first lateral channel part (30), to a second area (34), where the cavity overlaps a second lateral channel part (36). The second lateral channel part (36) includes a lateral channel part formed by a porous capillary suction structure (13). The cavity (24) forms a flow path (42) from the first lateral channel part (30) along the sensor surface area (22) to the second lateral channel part (36).