Segregating wafer carrier types in semiconductor storage devices

Abstract

A system for managing the entry of a wafer carrier into a stocker in a semiconductor manufacturing operation is disclosed. The system comprises a stocker that accepts wafer carriers via one or more input ports. The present invention provides a means for detecting the presence of a wafer carrier at the input port, means for identifying the type of the wafer carrier, and means for executing an action sequence if the stocker is not compatible with those wafer carriers. Upon detecting an erroneous condition, an action sequence is executed which may include prevention entry of the wafer carrier, and notifying an operator.