Heller Industries Inc. | https://hellerindustries.com/nonwetting/
. Process and design-related causes of PCB Nonwetting: Solder paste flux not aggressive enough for level of oxidation present on part or PCB PCB pad contaminated Component lead contaminated Excessive moisture absorbed by paste Paste exposed beyond
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) Prevent oxidation of the tin solder. (2) Improve soldering wetting and accelerate wetting speed (3) Reduce the solder balls, avoid solder bridge, and obtain good soldering quality Nitrogen SMT Reflow Oven
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-remove protective layer and the antioxidant in the flux suppresses continued oxidation over time. Such effects help save the amount of activator needed for oxidation prevention, as well as the activator capping technique which allows maximum activation strength when the solder is molten
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. Dewetting directly impacts the quality of solder joints. Root Cause Analysis The PCB pads or the component‘s pins are oxidized. An oxidation layer prevents contact between the solder and the surface plating layer
ASYMTEK Products | Nordson Electronics Solutions | https://www.nordson.com/en/divisions/select/applications/soldering?con=t&page=9
-Pitch Components Nordson SELECT Bob Klenke (Circuitnet, November 2019) Solder Nozzle Cleaning Nordson SELECT Removes oxidation residues and re-tins the nozzle surface without overspray of machine or printed circuit board eliminating contamination
ASYMTEK Products | Nordson Electronics Solutions | https://www.nordson.com/en/divisions/select/industries/automotive-and-transportation?con=t&page=6
. Nitrogen Generators Nordson SELECT Improves solder quality by eliminating oxidation in the soldering process and improves soldering aesthetics
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. Some Print Circuit board components is very small, easy to be oxidated in the high temperature environment, so need the nitrogen process to avoid oxidation on the solder surface
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/RSS_pcb-design-in-the-1970s_topic2333.xml
. The primary goal of solder mask back in the 70’s was toprotect the bare copper traces from oxidation and the acronym SMOBC wascreated
ASYMTEK Products | Nordson Electronics Solutions | https://www.nordson.com/en/divisions/select/products/selective-soldering-systems?con=t&page=3
throughout Florida with equipment and materials selection services, process expertise and technical support. Solder Nozzle Cleaning Nordson SELECT Removes oxidation residues and re-tins the nozzle surface without overspray of machine or printed circuit board eliminating contamination
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