August wrote: ====================================================================== Does anyone have a method to repeatedly clean a combination silicon nitride and oxide surface of organics? Piranna and Nitrated Piranna appear to damage the nitride and plasma cleaning takes to long to remove the organics. I need to be able to use this proceedure numerous times without etch or oxidizing the layers. ===================================================================== Why would not a plasma etcher, one operating at 100 watts and generally more power than one finds in a plasma cleaner, and using pure oxygen, remove the surface organics? One example (but there are others) would be the SPI Supplies Plasma Prep II unit, URL www.2spi.com/catalog/instruments/etchers1.shtml Disclaimer: SPI Supplies manufactures this equipment so we have a vested interest in this posting. Chuck