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Clean then assemble versus assemble then clean : several comparisons

Show simple item record Welker, Roger W. 2006-11-28T19:48:29Z 2006-11-28T19:48:29Z 2004-06-17
dc.identifier.citation 9th International Symposium on Particles on Surfaces : detection, adhesion and removal; Philadelphia, PA, June 17-18, 2004 en
dc.identifier.clearanceno 04-2202
dc.description.abstract Cleanliness of manufactured parts and assemblies is a significant issue in many industries including disk drives, semiconductors, aerospace, and medical devices. Clean manufacturing requires cleanroom floor space and cleaning technology that are both expensive to own and expensive to operate. Strategies to reduce these costs are an important consideration. One strategy shown to be effective at reducing costs is to assemble parts into subassemblies and then clean the subassembly, rather than clean the individual parts first and then assemble them. One advantage is that assembly outside of the cleanroom reduces the amount of cleanroom floor space and its associated operating cost premium. A second advantage is that this strategy reduces the number of individual parts that must be cleaned prior to assembly, reducing the number of cleaning baskets, handling and, possibly, reducing the number of cleaners. The assemble then clean strategy also results in a part that is significantly cleaner because contamination generated during the assembly steps are more effectively removed that normally can be achieved by hand wiping after assembly in the cleanroom. en
dc.description.sponsorship NASA/JPL en
dc.format.extent 9153501 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2004. en
dc.subject contamination en
dc.subject particles en
dc.subject surfaces en
dc.subject cleaning strategies en
dc.title Clean then assemble versus assemble then clean : several comparisons en
dc.type Preprint en

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