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August 2017

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Subject:
Dried flux
From:
Steven Kelly <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Steven Kelly <[log in to unmask]>
Date:
Thu, 24 Aug 2017 18:11:55 +0000
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Hi All,
I have a new hi-density BGA connector I am trying to assemble. When the supplier makes the connector they "solder balls onto the pin" (lead free). We see dried flux on the balls and when we solder the connector we are getting a few joints with head in pillow. The connector manufacturer says the dried flux is not an issue - is this true? Thanks. Steve Kelly

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