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Beaker Scale Testing for flux cleaning chemistries/surfactant

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#64200

Beaker Scale Testing for flux cleaning chemistries/surfactant | 22 April, 2011

Hi,

I am doing my master degree in flux cleaning process for flip chip assemblies and required to establish a new receipt for flux cleaning. currently, i am doing screening process for the parameters involve ; temp,pressure, surfactants, speed and angle of penetration using inline cleaning machine.

Is there any other ways to evaluate the chemical compatibility for flux cleaning instead of directly tries it using the cleaner machine? It will be a waste to use lots of chemical just for screening. I have found a paper that use beaker-test-scale method for chemical compatibility (Cleaning RMA Flux residue in a high Lead Wafer bumping process), but it didnt state the details about the method. Have anyone try this method before?

Your help is much appreciated.

Thank you.

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#64201

Beaker Scale Testing for flux cleaning chemistries/surfactant | 22 April, 2011

Quick question, how are you measuring the effectiveness of the cleaning process to remove the flux?

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#64205

Beaker Scale Testing for flux cleaning chemistries/surfactant | 23 April, 2011

As am doing screening right now, am not measuring the total cleanliness yet, i just observe by taking photos (FYI, am varying speed for conveyor belt for cleaning) and see whether the flux is able to be removed by certain parameters. the speed am using is 0.3,0.5,0.7 and 1.0 m per min..

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