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| Date: | Fri, 11 Dec 2009 08:29:47 +0100 |
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Depending on the HASL process the plating can become thin enough that intermetallic phases are growing through. Bevore starting any deoxidising it might be helpful to check that.
Guenter
>-----Ursprüngliche Nachricht-----
>Von: TechNet [mailto:[log in to unmask]] Im Auftrag von Lee Whiteman
>Gesendet: Donnerstag, 10. Dezember 2009 19:54
>An: [log in to unmask]
>Betreff: [TN] BOARD SOLDERABILITY
>
>One of my colleagues has a HASL finished board, that sat in our
>stockroom for ~ 10 years, and of course he want to use them (EOY
>Billing).
>
>Ran the board through wave soldering, and it did not solder at all. Good
>news was that the board was not damaged by the heat - it just was not
>solderable. I do not want to use a more active flux since it will be
>difficult to clean.
>
>Are there any solutions / processes that can restore board
>solderability?
>
>Thanks in advance.
>
>Lee Whiteman, PMP
>Senior Member Engineering Staff
>L-3 Communications East
>Telephone: (856) 338-3508
>FAX: (856) 338-2906
>E-Mail: [log in to unmask]
>
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