I am looking to learn of possible causes and solutions for the following problem.
A potential customer is demanding that I use a saponifier in the aqueous wash, he has lab test results of former CM's products that leads him to believe it is necessary.
The problem is at a PGA socket, its growing oxidation on the contacts. This has been verified by a independent lab using an environmental chamber. The product is an industrial computer PCBA that is expected to have a 7-10 year working life.
The customer claims that DI water alone is not good enough. I normally operate at 18 Megohms resistivity with my water. He wants to add the saponifier, thinking its a detergent that cleans better. I think the saponifier is acting like a coating, leaving a residual film that stops or slows down the oxidation of the socket leads.
All information you can share would be greatly appreciated.
Statement: This post is only the personal view of the author and does not represent the opinions of ALLPCB.com.