Patent ID: 6050885
Filing Date: 2000-04-18
Classification: B24B

Abstract:
A device for the chemical-mechanical polishing of the surface of an object withtwo polishing units with height-adjustable vacuum holders each for a semiconductor wafer, which is driven by a drive motor about a vertical axis,parallel, approximately horizontally running guides, along which the polishing units are guided independently of one another,drive means by which the polishing units are moved along the guides,a first polishing plate rotatingly driven below the guides, which is arranged approximately symmetrically on both sides of the longitudinal axes of the guides, by which means the polishing units in their corresponding operational position cooperate with oppositely lying sections of the polishing plate,at least one transfer and take-over device for the semiconductor wafer, at the end of the guides which is opposite to the polishing plate,two depositing and accommodating devices for the semiconductor wafer, which are arranged on oppositely lying sides of the guides and to which the polishing units are aligned and which are reached from the transfer and take-over device anda control device which controls the operation of the polishing units and of the transfer and take-over device.