Patent ID: 7879765

Claim:
An apparatus for detecting biochip information using phase changes to record and reproduce biochip information, the apparatus comprising: a biochip including a phase change layer deposited on a substrate, immobilized probes formed on a top of the phase change layer, and an array of target probes, bound to the immobilized probes, with nanoparticles being coated on tops of the target probes; laser beam scanning means for radiating a write laser beam to a top of the biochip to cause a phase change in the phase change layer and then stopping the radiation to cause a phase change in an area of the phase change layer where only immobilized probes are present so that information of binding states of the target probes of the biochip is recorded on the biochip; and reproduction means for scanning a read laser beam on the top of the biochip, detecting reflectance of the phase change layer according to phase change states of the phase change layer to read bio information recorded on the biochip, and outputting the read bio information through output means.