Calibration pod for robotic wafer carrier handling and calibration performed using same

A robotic wafer handling system, comprising:

• a robot;
• a calibration pod comprising a pod body configured for handling by the robot, a plurality of lasers disposed on a bottom of the pod body, and a power module operatively connected to power the plurality of lasers;
• and
• a load port for a bench tool, the load port having a plurality of alignment pins having a lateral pattern and a plurality of optical detectors with the same lateral pattern as the plurality of alignment pins and laterally offset relative to the lateral pattern of the plurality of alignment pins of the load port;
• and
• wherein the robot is laterally aligned with the load port when laser beams emitted by the plurality of lasers disposed on the bottom of the pod body of the calibration pod are detected by the plurality of optical detectors of the load port.

A method of calibrating a robot configured to load a wafer carrier into a load port of a bench tool, the method comprising:

• operating the robot to move a calibration pod above the load port such that a plurality of lasers of the calibration pod output laser beams downward from the calibration pod onto the load port;
• determining a lateral alignment of the robot respective to the load port by operating the robot to adjust a lateral position of the calibration pod to align the laser beams with a plurality of alignment features of the load port, wherein the alignment features have a same lateral pattern as alignment pins of the load port but are laterally offset relative to the lateral pattern of the alignment pins;
• and
• storing the determined lateral alignment in a robot configuration memory.