Adhesive bonding and miscellaneous chemical manufacture – Delaminating processes adapted for specified product – Delaminating in preparation for post processing recycling step
Patent
1987-06-09
1988-03-15
Powell, William A.
Adhesive bonding and miscellaneous chemical manufacture
Delaminating processes adapted for specified product
Delaminating in preparation for post processing recycling step
134113, 156345, 156668, 356436, B44C 122, B29C 3700
Patent
active
047311541
ABSTRACT:
An apparatus and method are disclosed for determining the cleanliness of an electronic circuit assembly (ECA) such as printed circuit boards (PCB) following normal cleaning and flux removal processes. The apparatus and method are used to quantitatively measure the organic contaminants such as the amount of rosin flux remaining on an ECA. The apparatus utilizes small volumes of isopropanol and a spectrophotometric analytical instrument. The apparatus generally provideds for washing the "cleaned" or defluxed ECA with a measured volume of isopropanol and thereafter measuring the organic contaminants in the wash solution by spectrometric analysis. The results can then be compared to a standard.
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Hausman Hazlitt Andrea Jo
Richey Warren F.
Powell William A.
Prieto Joe R.
The Dow Chemical Company
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