Characterization, Prevention and Removal of Particulate Matter on Printed Circuit Boards
Published: |
December 22, 2016 |
Author: |
Prabjit Singh, Patrick Ruch, Sarmenio Saliba - IBM Corporation, Christopher Muller - Purafil Inc. |
Abstract: |
Particulate matter contamination is known to become wet and therefore ionically conductive and corrosive if the humidity in the environment rises above the deliquescence relative humidity (DRH) of the particulate matter. In wet condition, particulate matter can electrically bridge closely spaced features on printed circuit boards (PCBs), leading to their electrical failure. (...) The objective of this paper is to develop and describe a practical, routine means of measuring the DRH of minute quantities of particulate matter (1 mg or less) found on PCBs.... |
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