Humidity requirement for soldering

[engr_joni_ee]

I was looking in one soldering standard that says "The relative humidity at room temperature of the facility shall be maintained at 55 % ± 15 %." What does it means 40 % to 70 % ? or ± 15 % of 55 ?

 

[KlausST]

Hi,

it means 40 % to 70 %

Btw: I don´t think the humidity is necessary for the soldering process. I rather guess you needs some minimum humidity to keep ESD problems low.

Klaus

 

[Externet]

The humidity at the soldering place may not be highly relevant; but the humidity within the solder paste is very important as becomes steam and explodes.

 

[engr_joni_ee]

How to increase the humidity in clean room if it is under 40 % ? Which factors effect.

 

[barry]

How to increase the humidity in clean room if it is under 40 % ? Which factors effect.

At the risk of stating the painfully obvious: Use a humidifier.

 

[KlausST]

At the risk of stating the painfully obvious: Use a humidifier.

I was about to answer the same..

 

[engr_joni_ee]

humidifier, is that a device ? can we use that in the clean room environment ?

 

[barry]

humidifier, is that a device ? can we use that in the clean room environment ?

Try this:
1) Google (or, the search engine of your choice)
2) In that little rectangle at the top type "Clean room humidifier"
3) Press "Enter"

 

[PCBFAE]

humidifier, is that a device ? can we use that in the clean room environment ?

Hi,

yes, humidifier is widely used in clean room for getting a higher humidity level when the RH is lower than spec .
It is also can be found in many PCB production house either .

BR