Clean assemblies are no longer a specialty in today’s electronics production. Fully automated washing systems ensure the reliable cleaning of assemblies after the final production steps in serial production. However, due to follow-up work on the printed circuit board, e.g.reworking, the standard component cleaning process suddenly plays a special role again. Reworking contaminates the printed circuit board, which can lead to undesired malfunctions later on. Flux residues, dust, fingerprints, grease and other substances may have accumulated on the PCB and should therefore be removed after reworking is complete.
However, integrating the reworked PCB into the cleaning process of series production can be difficult. Cleaning processes may have to be adapted, which in turn disrupts cycle times and production processes. Therefore a quick manual cleaning can be helpful. This requires not only the right medium, but also the right method of application. Ideally, these cleaning agents consist of an isopropynol alcohol mixture, which reliably removes all the above-mentioned impurities, including resinous residues. Furthermore, the cleaning medium must not attack the surface of the PCB, which ensures that it can be used on all substrates. Thanks to a brush spray bottle, these cleaning agents can be applied precisely and economically to the area of the reworked circuit board. It is also necessary to evaporate the cleaning agent without leaving any residues on the printed circuit board. Using an ESD cloth, excess residue can be removed from the PCB after application.
Do you have questions regarding this matter?
Your contact person: Markus Geßner
Company: Emil Otto GmbH