Patent ID: 7785864

Claim:
An apparatus for detecting bio-molecules by using electromagnetic induction, comprising: a cantilever of which one end is fixed and another end is set up to be movable; a first metal formed in a line shape in an upper plane of the cantilever, said first metal receiving a current signal, having a frequency component, applied thereto; a bio chip formed of a solid substrate of one of glass, silicon and nylon, wherein the bio chip is positioned on an upper part of the first metal, wherein the bio chip has a probe biomolecule for searching particular information on a sample to be analyzed, and wherein a lower surface of the bio chip abuts an upper surface of the first metal; a magnetic field source configured to form a magnetic field in a direction perpendicular to a direction the signal is applied, said magnetic field being on the same plane as the direction of the signal applied to the first metal; a signal source configured to apply the current signal having a frequency component to the first metal so that the cantilever makes an up and down movement; a detector configured to measure current signal values of the first metal before and after the probe biomolecule is bio-coupled with the sample, individually, wherein the current signal values of the first metal is determined based on the movement of the cantilever; and a second metal which is in a line shape and formed on the cantilever in the lower part of the bio chip separately from the first metal, and connected with the detector so that the detector can measure induced current signal values of the second metal before and after bio-coupling, wherein the first and second metals are separated by a portion of the cantilever, and wherein the induced current signal is induced in the second metal by the movement of the cantilever.