Electronic assembly production is carried out using a variety of welding methods. In most cases, the electronic assembly (printed circuit board) is manufactured using selective soldering and wave or soldering machine.
The continued trend towards further shrinking of printed components and circuit boards, the use of new generations of active components (BGA, CSP, COD, DCP) and the introduction of lead-free solder leads to demand. High quality welding bridge is increasing joints and reproducibility process.
This increases the need for welding processes.
At the same time, however, the focus is on saving consumable materials and the energy required to produce them.
The application of industrial gases in combination with new treatment technologies brings a successful solution here:
By inerting the welded atmosphere with nitrogen, the oxidation of the metal surface is prevented. The surface wetting with the weld is improved, greatly reducing the number of weld defects and increasing the quality of the weld. In general, nitrogen increases process safety, increases productivity and widens the process window of welding machines.
The use of solder and low-residue solder is only possible with nitrogen or with active gas (hydrogen). This eliminates complicated cleaning processes.
In addition to using inert gases, especially nitrogen, to inert welding systems, Messer offers a retrofit system for wave-soldering systems to inert the weld zone.
The use of the active gas not only prevents oxide formation during manufacturing, but also reduces existing oxides.
In front of all the applications to create welding atmosphere always produces a stable and oxygen-poor welding atmosphere. In addition, Messer offers its customers a comprehensive package of service measures. In addition to providing oxygen measuring devices, this also includes checking the remaining oxygen concentration as a function of the amount of nitrogen used. Messer also provides technological support related to "inert gas welding".
Messer has developed a technology to use the cold energy generated in the evaporation of liquid nitrogen to cool the reflector system and production rooms. This "transfers" the obtained cooling energy into our customer's cooling water circuit.
Benefits:
• Better wetting
• High quality of the welds
• Better weld
• Less flux residue
• Less soldering and throughput required
• Less maintenance
• Rework less
• Check welds more easily
• Greater process reliability
• Cost savings
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