Patent ID: 6534413
Filing Date: 2003-03-18
Classification: B81C,H01L

Abstract:
A method for removing sacrificial materials and metal contamination from silicon surfaces during the manufacturing of an integrated micromechanical device and a microelectronic device on a single chip, comprising the steps of:(a) adjusting the temperature of the chip using a reaction chamber, as necessary, to a temperature appropriate for the beta-diketone employed in step (c) and the design of the micromechanical and microelectronic devices; (b) cycle purging the chamber using an inert gas to remove atmospheric gases and trace amounts of water; (c) introducing HF and the beta-diketone as a reactive mixture into the reaction chamber which contains at least one substrate to be etched; (d) flowing the reactive mixture over the substrate until any sacrificial materials and metal contamination have been substantially removed; (e) stopping the flow of the reactive mixture; and (f) cycle purging the chamber to remove residual reactive mixture and any remaining reaction by-products.