Skip to Content
Find More Like This
Return to Search

Tools for measuring surface cleanliness

United States Patent

June 4, 2002
View the Complete Patent at the US Patent & Trademark Office
A procedure and tools for quantifying surface cleanliness are described. Cleanliness of a target surface is quantified by wiping a prescribed area of the surface with a flexible, bright white cloth swatch, preferably mounted on a special tool. The cloth picks up a substantial amount of any particulate surface contamination. The amount of contamination is determined by measuring the reflectivity loss of the cloth before and after wiping on the contaminated system and comparing that loss to a previous calibration with similar contamination. In the alternative, a visual comparison of the contaminated cloth to a contamination key provides an indication of the surface cleanliness.
Schroder; Mark Stewart (Hendersonville, NC), Woodmansee; Donald Ernest (Simpsonville, SC), Beadie; Douglas Frank (Greenville, SC)
General Electric Company (Schenectady, NY)
09/ 669,574
September 26, 2000
This invention was made with Government support under Government contract No. DE-FC21-95-MC31176 awarded by the Department of Energy. The Government has certain rights in this invention.