Patent ID: 8778282
Filing Date: 2014-07-15
Classification: B01L,F16K

Abstract:
1. A microfluidic device comprising: a first substrate; a second substrate which faces the first substrate; an elastic film between the first and second substrates; a microfluidic channel on the second substrate; a valve seat protruding into the microfluidic channel of the second substrate; a cavity on a surface of the first substrate facing the second substrate, and overlapping the valve seat; and a fine pattern on a surface of the elastic film facing the valve seat, and overlapping the valve seat, wherein the fine pattern comprises a concave groove extending away from the surface of the elastic film facing the valve seat, and the concave groove includes a bottom surface separated from the surface of the elastic film facing the valve seat, the bottom surface having a shape corresponding to a surface shape of the valve seat when the bottom surface of the concave groove is viewed in a first cross-sectional direction; wherein the elastic film and valve seat are configured such that contact between the fine pattern of the elastic film and the upper surface of the valve seat can block the flow of a fluid through the microfluidic channel.