However, the solubility of reflowed Rosin flux is poor in such agents. This clearly presents a safety problem. High molecular weigh alcohols. These are effective cleaning agents. However, due to their low vapor pressure, they will require a rinse with different agent such as a low molecular weigh alcohol.
Possible problems can arise as a result of cross-contamination of the rinse agent.
Also, low flash point considerations of the rinsing agents may be a safety concern. These are very effective cleaning agents when used under controlled conditions in the vapor phase. Propylene Glycol Ethers. However, the surface tension may be slightly high for flip chip cleaning applications. Based on the previous observations, it became apparent that by modifying the surface tension of certain Propylene Glycol Ethers, a reliable, efficient, and cost effective cleaning process can be achieved.