Patent ID: 8112177
Filing Date: 2012-02-07
Classification: G05B,H01L

Abstract:
1. A method for teaching a position of a semiconductor wafer to a robot for carrying the semiconductor wafer between a container and processing equipment or among processing equipments, comprising: sensing at least two external teaching tools mounted on a front external wall of the container or processing equipment with a sensor provided at a wafer gripping portion of the robot controlled by a controller; and then roughly estimating an estimated position of an internal teaching tool at an internal position of the container or processing equipment where the semiconductor wafer is to be set using a controller, based on the sensing of said at least two external teaching tools by the sensor; and then approaching the internal teaching tool with the sensor provided at the wafer gripping portion of the robot controlled by the controller, based on the estimated position of the internal teaching tool and sensing the internal teaching tool to determine the position of the internal teaching tool, wherein said at least two external teaching tools are mounted on the front external wall of the container or processing equipment in a horizontally offset manner.