Cleaning Semiconductor Equipment
Q. We’re getting some residue from foaming of detergent on our semiconductor handling equipment.
A. To clean semiconductor handling equipment in electronics, use a warm 3% Detergent 8 (30 mL/L) solution followed by a deionized water rinse to clean the equipment. Detergent 8 is free of any metal ion ingredients such as sodium that can dope a semiconductor.
Cleaning Chromate Finished Zinc Plated Bolts
Q. I need to specify a cleaning protocol for chromate finished zinc plated bolts. The plater commented that any cleaning (except for a very mild one) can damage the chromate finish. The customer is concered about residual oils. My guess at a cleaning protocol would be: clean in ultrasonic bath, 2 min with 1% Alconox solution, rinse with de-ionized water. All we are doing is cleaning fasteners to be installed in a clean room. The level of cleanliness for these fasteners is a bit fuzzy. Does this sound reasonable?
A. Read the answer.
Cleaning Bioreactors
Q. How can I clean bioreactors and do you have any SOPs you can offer.
A. Liquinox is typically used for cleaning bioreactors. A 1% solution of Liquinox (1.25 oz/gal or 10 mL/L) is used to soak and scrub the bioreactor. Learn More.
Health and Safety Considerations for Medical Device Cleaners
Q. What are health and safety considerations when selecting and using a medical device cleaning agent?
A. Human health and safety considerations include detergent toxicity, corrosivity, reactivity, and flammability. These considerations can be evaluated by reviewing a Safety Data Sheet for the solvent, chemical, or detergent with which you intend to clean. Learn More.
Cleaning Machined PTFE Parts
Q. I just received your chapter on cleaning SOPs and I look forward to reading it. In parallel, I was hoping to get your thoughts or a bit of advice on how to create and implement cleanliness specifications/processes for machined (PTFE) plastic parts. Cutting fluid for the machining center is basically a water soluble vegetable oil-based fluid. The use of this plastic manifold and cover is within an electro-mechanical-fluidic subsystem (“Delivery Module”). This delivery module accumulates a quantity of 59wt% Hydrogen Peroxide that has been … Click to Read The Full Question and Answer.
