Abstract: A cassette for supporting substantially planar objects such as photomasks, glass plates or semiconductor wafers during processing. The cassette is composed of bars connected at each end to an endpiece. Arms which form part of the endpiece are hinged to permit the side bars of the cassette to move inwardly and outwardly from one another when objects are inserted in the cassette. A bridge can connect an upper portion of the arms. The bridge can be used to lift the cassette and cause flexing of the cassette to ensure better retention while the cassette is being lifted.

Abstract: A multiple stage wet processing platform includes a sealable enclosure, at least two processing modules positioned within the enclosure, at least one of them including a housing having an opening and a door moveable into position covering the opening, at least two processing vessels within the housing, and an intra-module robot within the housing and including a wafer support member, the intra-module robot moveable to a first position in which the support is disposed in a first one of the processing vessels and a second position in which the support is disposed in a second one of the processing vessels. An inter-module robot is positioned within the enclosure and is moveable between a first position adjacent to a first one of the modules and a second position adjacent to a second one of the modules.

Abstract: An apparatus and method for performing multiple wet processing steps on objects placed within a sealed chamber. The apparatus include a sealable chamber, at least one processing tank within the chamber, and preferably also includes an intrachamber robot configured to move objects to be treated within the chamber. Preferred embodiments utilize at least two processing tanks within the chamber. During use of these exemplary embodiments, objects to be treated are placed within the sealed chamber and the chamber is sealed to create a sealed interior environment. The objects are immersed in a first treatment fluid which is in a first one of the tanks, and then carried by the intrachamber robot from the first to the second tank where there are immersed in a second treatment fluid in the second tank. The objects may be moved back and forth between the tanks as needed in order to complete the process being performed. After processing is complete, the chamber is unsealed and the objects are removed from the chamber.

Abstract: A cassette for supporting substantially planar objects such as photomasks, glass plates or semiconductor wafers during processing. The cassette is composed of bars connected at each end to an endpiece. Arms which form part of the endpiece are hinged to permit the side bars of the cassette to move inwardly and outwardly from one another when objects are inserted in the cassette. A bridge can connect an upper portion of the arms. The bridge can be used to lift the cassette and cause flexing of the cassette to ensure better retention while the cassette is being lifted.

Abstract: A conductivity cell for use in determining ionic concentrations in the gap between two semiconductor substrates or wafers. The wafer gap conductivity cell is composed of two flat electrodes separated by a fixed gap. The electrodes are fabricated from wafers of the same type and dimensions used as semiconductor device substrates. All or a portion of the surfaces of the wafer electrodes are coated with a conductive material. The wafer gap conductivity cell is placed in a wafer cassette or other suitable wafer holder, whose other slots are filled with wafers which are to be cleaned or subjected to another fabrication process. The cell can be used to characterize the processes used during the fabrication of semiconductor devices and assist in investigating the effect on the processes of different process vessel designs.

Abstract: A method and apparatus for monitoring characteristics of a fluid contained in a vessel includes a fluid displacer suspended in the vessel. The buoyant force acting on the fluid displacer is measured using a pair of force transducers and used to calculate fluid characteristics such as the height of the fluid in the vessel, fluid density, solute concentration, and/or the presence of fluid cascading from one section of the vessel to another.