Vapor Phase Process Chart For Lead Free Soldering

 

1. The assembly is moved to the vapor phase. It was preheated by IR radiators from the top. It also can be preheated on the upper boundary of the vapor phase predominantly from below. The use of IR preheat improves the quality of the solder joint and allows the free shaping of the temperature profiles.

 
Vapor phase process step three

2. The assembly dives into the vapor phase. There, it is heated up. With a patented procedure, it is possible to control the heat transfer to the assembly  in a way that soft temperature rise is performed.

 
  vaport phase process step  two

3. The vapor condenses on the assembly and transfers its heat. Since the vapor is inert, it performs an inert gas atmosphere with 0 ppm oxygen. This is done automatically without the use of nitrogen.

 
  Vapor phase process step four

4. The assembly can be heated up to a maximum temperature that equals the temperature of the vapor. This temperature cannot be exceeded even if the assembly stays longer inside the vapor. Therefore, no overheating is possible.

 
  Vapor phase process step five

5. After leaving the vapor phase there is still condensed fluid left on the board. Due to the inner heat of the assembly, the liquid evaporates and a dry assembly leaves the machine.

 

 
 

The CSI Company, LLC
10 Derry St.
Nashua, NH 03063
Office Number: 603-594-9909
Fax Number: 603-594-9913
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