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

Claim 7:
8. The wafer detection device according to claim 1, wherein the detecting unit includes: at least one regression-reflection laser sensor and at least one reflector, and each regression-reflection laser sensor corresponds to one reflector; the regression-reflection laser sensor is electrically connected to the detection processing unit; the regression-reflection laser sensor emits a wafer detecting laser beam to the work plane, the wafer detecting laser beam is not blocked by the clamping jaw, the corresponding reflector reflects the emitted wafer detecting laser beam to the regression-reflection laser generator along an original path, the regression-reflection laser generator receives the reflected wafer detecting laser beam and converts the optical signal of the received wafer detecting laser beam into the corresponding second electrical signal; the wafer detecting laser beams emitted by the different regression-reflection laser generators have different frequencies; if it can be deduced from the second electrical signal that the regression-reflection laser generator can't receive the wafer detecting laser beam it emitted, then it can be judged that the wafer is clamped by the clamping jaw.