Automatic ionic cleanliness tester
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United States of America Patent
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Mar 24, 1998
Grant Date -
N/A
app pub date -
Jul 19, 1996
filing date -
Jul 19, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An automatic ion residue monitoring and testing system that has a particular application to quantify ionic residue on a printed circuit board. The monitoring system is a stand-alone unit that includes a purification system for providing deionized water. Deionized water from purification system is heated and sent to an extraction tank where it is held in a controlled quantity. A printed circuit board is placed in the extraction tank and the heated deionized water is caused to circulate through the extraction tank so as to remove ionic contamination on the circuit board. The system then automatically extracts a controlled quantity of now ionized water from the extraction tank and sends it to an ion chromatograph. The ion chromatograph tests the contaminated water, and provides a readout of the level of ionic contamination in the water.
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