Patent ID: 11972963
Assignee: SHANGHAI HUALI INTEGRATED CIRCUIT CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B  G | IPC B  G  H

Claim 0:
1. A wafer transfer module in a semiconductor manufacturing machine, comprising:
a first transfer module sidewall and a second transfer module sidewall opposite to the first transfer module sidewall;
an elevator located between the first transfer module sidewall and the second transfer module sidewall and used to carry a wafer, wherein the elevator comprises an elevator sidewall and a plurality of inserts, one end of each of the plurality of inserts is fixed to the elevator sidewall and is in a spaced arrangement along a height direction of the elevator sidewall, the other end of each of the plurality of inserts protrudes from the elevator sidewall, a portion protruding from the elevator sidewall carries the wafer, and the height direction of the elevator sidewall is consistent with an extension direction of the first transfer module sidewall and the second transfer module sidewall;
a first transmitter and a first receiver, wherein the first transmitter is disposed on the first transfer module sidewall, the first receiver is disposed on the second transfer module sidewall, and the first receiver is positioned opposite the first transmitter such that in a case of no obstruction between the first receiver and the first transmitter, the first receiver can receive a signal transmitted by the first transmitter;
a second transmitter and a second receiver, wherein the second transmitter is disposed on the first transfer module sidewall, the second receiver is disposed on the second transfer module sidewall, the second receiver is positioned opposite the second transmitter such that in a case of no obstruction between the second receiver and the second transmitter, the second receiver can receive a signal transmitted by the second transmitter, the first transmitter and the first receiver corresponding thereto and the second transmitter and the second receiver corresponding thereto are used to monitor the position of a to-be-transferred wafer in a vertical direction, and according to a position change of the to-be-transferred wafer in the vertical direction, the first receiver outputs a first wafer position signal E1 and the second receiver outputs a second wafer position signal E2, wherein the position change of the to-be-transferred wafer in the vertical direction is implemented by means of movement of the elevator in the vertical direction;
a third transmitter and a third receiver, wherein the third transmitter is disposed on the first transfer module sidewall, the third receiver is disposed on the second transfer module sidewall, and the third receiver is positioned opposite the third transmitter such that in a case of no obstruction between the third receiver and the third transmitter, the third receiver can receive a signal transmitted by the third transmitter;
a fourth transmitter and a fourth receiver, wherein the fourth transmitter is disposed on the first transfer module sidewall, the fourth receiver is disposed on the second transfer module sidewall, the fourth receiver is positioned opposite the fourth transmitter such that in a case of no obstruction between the fourth receiver and the fourth transmitter, the fourth receiver can receive a signal transmitted by the fourth transmitter, the third transmitter and the third receiver corresponding thereto and the fourth transmitter and the fourth receiver corresponding thereto are used to monitor the position of a transfer arm used to transfer the wafer in the vertical direction, and according to a position change of the transfer arm in the vertical direction, the third receiver outputs a first transfer arm position signal H1 and the fourth receiver outputs a second transfer arm position signal H2; and
a control system that receives the first wafer position signal E1, the second wafer position signal E2, the first transfer arm position signal H1, and the second transfer arm position signal H2 and outputs a transfer arm control signal C according to the first wafer position signal E1, the second wafer position signal E2, the first transfer arm position signal H1, and the second transfer arm position signal H2, to control whether the transfer arm moves to obtain the to-be-transferred wafer, wherein the vertical direction is the height direction of the elevator sidewall.