Patent ID: 7189359

Claim:
A magnetic beads biochemical detecting device for detecting a target in a plurality of magnetic beads of a droplet, comprising: a first substrate; a magnetic layer located on said first substrate; an isolation layer located on said magnetic layer; at least a first electrode located on said isolation layer, wherein said first electrode is zigzag-shaped; a first dielectric layer located on said first electrode; a first hydrophobic layer located on said first dielectric layer; a second substrate; at least a second electrode located on said second substrate and having a cathode and an anode, wherein said cathode and said anode are comb-shaped and are interlaced with each other; a second dielectric layer located on said second electrode; and a second hydrophobic layer located on said second dielectric layer; wherein said first substrate and said second substrate are respectively configured to make said first electrode and said second electrode face to each other and to form a gap therebetween; said droplet is movable in said gap by a voltage difference produced between said first electrode and said second electrode; a magnetic force for attracting said plurality of magnetic beads is induced by applying currents only on said first electrode; and a positive-and-negative interlaced electric field is generated by applying currents on said cathode and said anode for initiating a certain reaction of said target to further generate a signal of current to be detected.