Vinesh: You�ll find no papers that "clearly describes the harmful effects" of your style "of white residues," because no one is crazy enough to brag that they are doing what your customer wants you to do.
The residue of no-clean fluxes are designed to be benign for most applications. They are called no-clean, because these benign residues do not require cleaning. Here�s what I think you should do:
1 Establish measures of cleanliness by:
� Telling your customer that you appreciate their concern about flux residues and that you want to meet their cleanliness standards. � Asking them to quantitatively define their cleanliness standards (rather than telling you how to go about cleaning boards). It�s their job to tell you what they want and it�s your job to give them what they ask for, as long as it�s not too stupid. � Agreeing on and documenting the method the two of you will use to measure the cleanliness of the boards.
2 Educate you customer about no-clean fluxes by:
� Calling you flux supplier, describing the situation, and requesting they give you and your customer a presentation on no-clean fluxes from a technical perspective. � Developing pricing alternatives of no-clean soldering only, no-clean soldering with IPA cleaning and accepting the white resin coated, ugly solder connections, and no-clean soldering with IPA cleaning and further cleaning to remove the white resin coated, ugly solder connections. � Considering the alternative of using OA flux and washing for this customer.
Good luck
Dave F
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