Patent ID: 7790052
Filing Date: 2010-09-07
Classification: H01L

Abstract:
1. A method for receiving a substrate comprising: transferring a cassette, receiving the substrate on the plates of the cassette, to a cassette loading unit having uploading and downloading functions; fixing the cassette on the cassette loading unit using clamps, the clamps arranged at corners of the cassette; inserting the auxiliary plates between plates of the cassette from outside by revolving at least two auxiliary plate support bars, wherein the auxiliary plates are supported by the auxiliary plate support bars arranged on a port, supporting the cassette loading unit, at both sides of the cassette, wherein the auxiliary plates are inserted to be substantially parallel with the plates of the cassette and to be respectively lower than the plates of the cassette, and wherein the auxiliary plates are longer than the plates of the cassette; after inserting the auxiliary plates, downwardly moving the cassette by the cassette loading unit so as to move substrates from the plates of the cassette to auxiliary plates longer than the plates of the cassette, the downwardly moving the cassette occurring while simultaneous moving the same substrates from plates of the cassette to auxiliary plates; unloading and loading the same substrates from/on the auxiliary plates in the cassette; upwardly moving the cassette by the cassette loading unit so as to move the same substrates from the auxiliary plates to the plates of the cassette, the upwardly moving the cassette occurring while simultaneous moving the same substrates from the auxiliary plates to the plates of the cassette; and wherein the auxiliary plates support the same substrates only within the cassette, and wherein the same substrates in the cassette are unloaded from the auxiliary plate on a conveying robot arm, entered in the cassette for unloading the same substrates, and are loaded from the conveying robot arm on the auxiliary plate, again entered in the cassette for loading the same substrates.