Research on a method for real time values for wash concentration and soil levels in aqueous cleaning processesAuthor: Ram Wissel
Company: Kyzen Corporation
Date Published: 11/18/2014 Conference: Symposium
Aqueous cleaning fluids are engineered to remove the most challenging flux residues from highly dense electronic assemblies. Cleaning fluids and processes are highly dynamic. The cleaning agents are typically delivered at elevated temperatures using pressurized spray impingement. The materials that make up the cleaning agent perform critical functions that enable cleaning on a wide range of flux residue soils under bottom terminations. Specific materials are required to dissolve, react, induce a dipole, wet, and inhibit material interactions with components. Over time, some of the materials will deplete while other build up within the wash bath. Assemblers want to know that the wash bath is within control limits. Controlling the wash bath requires the ability to monitor the chemistry/water ratio, adjust for build-up and depletions, flux loading and predict when the wash bath is depleted. Achieving real time monitoring and adjustments is highly complex. The purpose of this research is to present advance technology for monitoring, controlling, and measuring contamination levels. The goal of the technology is provide the assembler with real time data for controlling the cleaning process.
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