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The RCA clean is a standard set of wafer cleaning steps which need to be performed before high-temperature processing steps (oxidation, diffusion, CVD) of silicon wafers in semiconductor manufacturing. Werner Kern developed the basic procedure in 1965 while working for RCA, the Radio Corporation of America.
1. Pre-cleaning: The test surface is cleaned to remove any dirt, paint, oil, grease or any loose scale that could either keep penetrant out of a defect or cause irrelevant or false indications. Cleaning methods may include solvents, alkaline cleaning steps, vapour degreasing, or media blasting. The end goal of this step is a clean surface where ...
While the valve is off, the threads of cylinder and valve must be checked to identify the thread type and condition. The threads of cylinder and valve must be of matching thread specification, clean and full form, undamaged and free of cracks, burrs and other imperfections. Tap marks [note 3] are acceptable and should not be confused with ...
Example checklist. While the check sheets discussed above are all for capturing and categorizing observations, the checklist is intended as a mistake-proofing aid when carrying out multi-step procedures, particularly during the checking and finishing of process outputs. This type of check sheet consists of the following:
Follow this bathroom cleaning checklist, complete with expert tips. This daily, weekly, monthly and seasonal schedule will keep it sparkling and mildew-free. Bathroom cleaning checklist: What to ...
House deep-cleaning an intensive cleaning process targeting often-neglected areas, enhancing aesthetics, and improving health by reducing allergens and bacteria. It typically includes tasks like detailed dusting, appliance cleaning, and carpet shampooing, recommended biannually to maintain a home's hygiene and air quality.