Tools for measuring surface cleanliness

Schroder, Mark Stewart; Woodmansee, Donald Ernest; Beadie, Douglas Frank

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A - human necessities
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Title: Tools for measuring surface cleanliness

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Abstract

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.

Inventors:

Schroder, Mark Stewart ^[1]; Woodmansee, Donald Ernest ^[2]; Beadie, Douglas Frank ^[3]

Hendersonville, NC
Simpsonville, SC
Greenville, SC

Issue Date:: 2002-01-01

Research Org.:: General Electric Co., Schenectady, NY (United States)

OSTI Identifier:: 874474

Patent Number(s):: 6397690

Assignee:: General Electric Company (Schenectady, NY)

Patent Classifications (CPCs):: B - PERFORMING OPERATIONS B08 - CLEANING B08B - CLEANING IN GENERAL

G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES

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B - PERFORMING OPERATIONS B08 - CLEANING B08B - CLEANING IN GENERAL
B08B1/00 - Cleaning by methods involving the use of tools, brushes, or analogous members

G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N1/02 - Devices for withdrawing samples
G01N2001/028 - {Sampling from a surface, swabbing, vaporising}
G01N21/94 - Investigating contamination, e.g. dust

Show less

DOE Contract Number:: FC21-95MC31176

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: tools; measuring; surface; cleanliness; procedure; quantifying; described; target; quantified; wiping; prescribed; flexible; bright; white; cloth; swatch; mounted; special; tool; picks; substantial; amount; particulate; contamination; determined; reflectivity; loss; contaminated; comparing; previous; calibration; similar; alternative; visual; comparison; key; provides; indication; measuring surface; /73/

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                    Schroder, Mark Stewart, Woodmansee, Donald Ernest, and Beadie, Douglas Frank. Tools for measuring surface cleanliness.  United States: N. p., 2002. 
        Web.

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                    Schroder, Mark Stewart, Woodmansee, Donald Ernest, & Beadie, Douglas Frank. Tools for measuring surface cleanliness.  United States.

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                    Schroder, Mark Stewart, Woodmansee, Donald Ernest, and Beadie, Douglas Frank. Tue .  
        "Tools for measuring surface cleanliness".  United States.  https://www.osti.gov/servlets/purl/874474.

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@article{osti_874474,

  title        = {Tools for measuring surface cleanliness},

  author       = {Schroder, Mark Stewart and Woodmansee, Donald Ernest and Beadie, Douglas Frank},

  abstractNote = {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.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2002},

  month        = {1}

}

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