Cleanliness of Stencils and Cleaned Misprinted Circuit Boards Cleanliness of Stencils and Cleaned Misprinted Circuit Boards There are long-established standards and test methods for ionic cleanliness levels for bare printed circuit boards
| https://www.smtfactory.com/PCBA-Cleaning-Machine-PCB-Defluxing-For-Best-Coating-and-Bonding-Effect-id43566387.html
cleaning is a full and important production step. But even with the so-called no-clean manufacturing, it may be that these components must be cleaned to avoid malfunctions
| https://www.eptac.com/faqs/ask-helena-leo/page/8
. The excess no-clean flux is located in an Ethernet port connector. The units pass all tests with no issues, however; we have recently had a couple of field returns where it was