Results with Benchtop PCB Cleaning
This paper examines the role variables play in aerosol cleaning and offers guidelines to improve an aerosol cleaning process.
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Authored By:
Lindsey Shehan, Chemist
Techspray, Amarillo, Texas USA
Summary
The purpose of this study is to determine whether or not aerosol benchtop cleaning can consistently and reliably clean reworked boards. Different variables that play a role in the effectiveness of aerosol benchtop cleaning were examined. These variables include straw attachment, spray technique, spray angle, handheld cleaning tools, brush attachments, and a final rinse.
While no approach to aerosol benchtop cleaning was found to be 100% effective all of the time, the study did yield good information that can be used as general guidelines to improve benchtop cleaning processes.
Conclusions
There is no "one size fits all" approach to aerosol benchtop cleaning. There are too many variables involved in benchtop cleaning that prevent developing a method/formula for cleaning that appears to be (per visual inspection) 100% effective all of the time. That being said, some methods do work better than others, and selecting the correct combination and formalizing the process will reduce variability.
Initially Published in the IPC Proceedings
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