Why N2 in the electronics production process : Oxidation is unavoidable in soldering due to the combination of oxygen and hot air. When nitrogen displaces oxygen, corrosion can be prevented.
Soldering is a process in which a low-melting point conductive material is used to connect two or more components. During the process, the conductive material melts and flows into a joint, joining the parts. In the production of electronics, soldering is used in the connection of electronic components such as capacitors, resistors, LEDs and transistors
There are several soldering ways:
• Wave soldering
• Selective soldering
• Reflow soldering
The combination of the oxygen in the air and the heat exposed to the solder metals creates an atmosphere in which oxidation is inevitable. This will lead to corrosion of the solder metal. This problem can be avoided if oxygen is replaced by nitrogen.
With the Seho Wave Soldering Machine (Assembly1) and the BTU Reflow Furnace (SMD), the nitrogen is blown onto the connecting metal to displace the oxygen. The purity of the gas must be at least 99.99%, any lower purity will compromise the quality of the soldering. In addition, the high gas purity also helps to disperse the nitrogen at lower temperatures, reducing the total energy costs. The purity of the N² generator at BHC is currently 99.9965%
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