Patent ID: 11961749
Assignee: HANGZHOU SIZONE ELECTRONIC TECHNOLOGY INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 5:
6. The wafer detection device according to claim 1, wherein the wafer parallel measuring unit includes: at least one transmittance laser generator, at least one transmittance laser receiver and at least one reflector, and each transmittance laser generator corresponds to one transmittance laser receiver and one reflector; the transmittance laser generator emits the parallel measuring laser beam, the reflector reflects the emitted parallel measuring laser beam, the corresponding transmittance laser receiver receives the reflected parallel measuring laser beam and converts the optical signal of the received parallel measuring laser beam into the corresponding first electrical signal; the parallel measuring laser beams emitted by the different transmittance laser generators have different frequencies; both the parallel measuring laser beams emitted by the transmittance laser generator and reflected by the reflector are parallel to the bottom of the clamping jaw and a distance between the parallel measuring laser beams emitted by the transmittance laser generator and the bottom of the clamping jaw and a distance between the parallel measuring laser beams reflected by the reflector and the bottom of the clamping jaw are the same; if it can be deduced from the first electrical signal that the transmittance laser receiver can receive the parallel measuring laser beam emitted by the corresponding transmittance laser generator, then it can be judged that the wafer is parallel to the bottom of the clamping jaw.