Patent ID: 11908720
Assignee: HANGZHOU SIZONE ELECTRONIC TECHNOLOGY INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 7:
8. A wafer transfer robot used to transfer wafers in a cleaning module of a chemical mechanical planarization equipment, to take out the wafers that have been cleaned in a cleaning unit in a vertical state, and to flip over and place them horizontally into a drying unit of the cleaning module, comprising:
a horizontal transfer shaft only located on one side of the cleaning unit;
a horizontal transfer carriage that is arranged on the horizontal transfer shaft and moves laterally along the horizontal transfer shaft;
a first vertical lifting shaft that is arranged on a lateral transfer pallet and performs vertical movement on a lateral transfer carriage;
a rotating platform arranged on the first vertical lifting shaft;
a first jaw clamping arm which is connected to a rotating table and driven by the rotating platform to make rotational movement for wafer grabbing and placement,
wherein the cleaning unit and drying unit is installed with switchable doors for automatic opening or closing when the wafer transfer robot grabs and places wafers,
wherein the cleaning unit comprises a pre-drying unit and other units of cleaning module, which are located on both sides of the pre-drying unit; the pre-drying unit works in vertical direction; the wafers in the pre-drying unit are transferred to the drying unit by the first jaw clamping arm; the other units of cleaning module may be one or more of the wafer transition unit, megasonic cleaning unit, and scrubbing unit,
wherein the cleaning module further comprises a buffer unit, which is located in front of the cleaning input unit and temporarily stores a number of wafers,
wherein a water injector is installed in the buffer unit to prevent the wafers from being dried without being cleaned.