Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


RICK_EEI

#9104

PCB Cleaning | 7 October, 1999

Hi everyone, I am having a problem with cleaning PCB's with different finishes. I run one type of board through a drag solder and it comes out perfect using a water slouble flux then putting it in an aqueous cleaner. Then I run another board with a different finish and it comes out with a white haze to it. Does anyone know of a book or website with different cleaning methods in respect to which type of PCB finish that I'm dealing with? Or any other suggestions would be greatly appreciated.

Thank you, Rick

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Brian

#9105

Re: PCB Cleaning | 8 October, 1999

| Hi everyone, I am having a problem with cleaning PCB's with different finishes. I run one type of board through a drag solder and it comes out perfect using a water slouble flux then putting it in an aqueous cleaner. Then I run another board with a different finish and it comes out with a white haze to it. Does anyone know of a book or website with different cleaning methods in respect to which type of PCB finish that I'm dealing with? Or any other suggestions would be greatly appreciated. | | Thank you, Rick |

The problem is most probably due to the type of solder mask. The book below will help.

Brian

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#9106

Re: PCB Cleaning | 8 October, 1999

| | Hi everyone, I am having a problem with cleaning PCB's with different finishes. I run one type of board through a drag solder and it comes out perfect using a water slouble flux then putting it in an aqueous cleaner. Then I run another board with a different finish and it comes out with a white haze to it. Does anyone know of a book or website with different cleaning methods in respect to which type of PCB finish that I'm dealing with? Or any other suggestions would be greatly appreciated. | | | | Thank you, Rick | | | | The problem is most probably due to the type of solder mask. The book below will help. | | Brian | | Rick: "White haze" doesn't make me think of poor cleaning, first. It makes me think of poorly processed solder mask.

In deference to Brain (and his efforts to peddle books), you should get your fabricator involved. Your fabricator can recommend a mask that is compatable with your process.

My2�

Dave F

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