Abstract:
Backing pads (11) adapted for attachment to a pressure plate (14) for machining workpieces with the outer exposed surfaces of the pad having been abraded to eliminate surface irregularities and to achieve a desired flatness on the surface of the pad.
Abstract:
Methods and apparatus for measuring and controlling the flow rates of processing solutions to a CMP machine during the polishing and planarization process. The apparatus comprises a processing solution source, a processing solution dispensing system for applying the solution to the CMP machine, a mechanism for transferring the processing solution from the solution source to the dispensing system, and a metering or sensing system for accurately measuring the amount of processing solution actually dispensed to the CMP machine. Preferably, the metering system comprises a coriolis mass flow meter and a controller for controlling its operation. The metering system may interface with the CMP machine controller in a feed-back loop configuration so that the actual flow rates of the solutions may be controlled in real time.
Abstract:
The present invention relates generally to a wafer cassette holding mechanism for use in processing wafers. The cassette holding mechanism has adjustable alignment posts to facilitate the cassette placement and an adjustment guide to guide placement of the cassette on the holding mechanism so that the holding mechanism may receive and securely hold in place a variety of different sizes and brands of cassettes.
Abstract:
The present invention relates generally to abrasive stone pads for use in processing workpiece surfaces. The abrasive stones generally are produced by combining a phenolic resin mixture with a diluent and then injecting microballoon structures into the resin/diluent mixture to create a porous solution. The diluent is initially ball-milled with an abrasive in a tumbler to eliminate the agglomerates and is then added to a resin monomer. A suitable catalyst is added to the mixture to create a chemical reaction, further increasing the porocity of the substance. The mixture is poured into molds and through a filter of frit plate to remove excess resin and diluent. Finally, the mixture is cured, creating abrasive stones having a uniform surface and bulk structure with a uniform hardness, suitable for workpiece grinding.