Selective Soldering

What are the advantages of nitrogen for your selective wave soldering process

Improved quality of solder joints

Nitrogen helps create a cleaner solder environment, which results in better quality solder joints.

Reduced oxidation

By replacing air with nitrogen, the risk of oxidation is reduced, helping to ensure a stronger and more reliable connection between components and the PCB.

Increased productivity

Nitrogen allows faster wetting which can help increase the speed of the brazing process, and improve productivity.

Improved repeatability

Maintaining and controlling the inert atmosphere around the selective wave nozzle during the soldering process helps ensure consistent and repeatable results.

Our offer for selective brazing under nitrogen

With Air Liquide, benefit from a tailor-made solution, reliable, safe and optimized according to your needs!

Nitrogen supply

For this process a supply of high quality nitrogen (purity < 10 ppm O₂) is required:

  • One or more racks of conditioned nitrogen bottles (200 or 300 b)
  • A liquid nitrogen storage equipped with atmospheric heaters
  • An on-site production solution (PSA-type on-site).

For each customer, the nitrogen requirement and the type of supply to be offered are defined by our teams of experts, according to the specifications, in order to achieve the optimum level of performance for your wave soldering process.

Expertise and experience at your service

To take full advantage of these benefits, it is important to carefully control the flow rate and purity of the nitrogen used in selective wave soldering.

Our experts support you from the design of the optimal solution defined from your specifications to the implementation and start-up of your solution.

We train your teams in the use of nitrogen (e.g. safety, handling, etc.) as well as the maintenance of your equipment.

At your request, our experts carry out recurring or one-off audits of your selective shaving equipment to ensure that your installations are operating optimally over time.

Sample Audit

Selective wave soldering is a highly efficient process that allows the selective soldering of complex electronic assemblies, while minimizing the risk of damage to sensitive components. To get the maximum efficiency from the process, to obtain the best quality, it is important to take the greatest care with the inerting device of the equipment nozzle, and to regularly monitor its performance, to ensure that the welds are perfect.

For the majority of selective soldering equipment, the length of the nozzle and its geometry induce significant heat losses. Usually, these thermal losses are compensated by a significant rise in the temperature of the alloy, which greatly increases the sensitivity of the alloy to oxidation. In the majority of cases, it is impossible to perform air soldering.

The protective atmosphere is essential in wave soldering, which is always carried out under nitrogen. During the soldering process, the substitution of air with nitrogen protects and prevents oxidation of the solder and components, ensuring a high performance, strong and reliable solder joint.