Patent ID: 8585013

Claim:
A magnetic microvalve using a metal ball, the magnetic microvalve comprising: an upper substrate having a microchannel serving as a passage through which a fluid moves, a fluid inlet through which the fluid flows into the microchannel, and a fluid outlet through which the fluid, having passed through the microchannel, flows out of the microchannel; a lower substrate having a trench locally provided therein; a PDMS/metal ball combination having a metal ball and PDMS surrounding the metal ball so that the metal ball is located in a central portion thereof, the PDMS/metal ball combination being fully inserted into the trench provided in the lower substrate; and an external magnet located above the microchannel, provided in the upper substrate or below the lower substrate under the microchannel, and generating magnetic force, wherein the PDMS surrounding the PDMS/metal ball combination closes the micro channel by deforming the PDMS surrounding the PDMS/metal ball combination upon magnetic force pulling the PDMS/metal ball combination.