Electronics Forum: substrate discoloration (Page 1 of 1)

pbga substrate crack vision system

Electronics Forum | Thu Sep 24 18:57:03 EDT 2009 | davef

From "siliconfareast.com": Basic Die Cracking FA Flow 1) Failure Information/Device and Lot History Review. Understand the customer's description of the failure, i.e., the failure mode, where it was encountered, what conditions the sample was subject

Lead Free Substrate

Electronics Forum | Mon Mar 07 15:35:35 EST 2005 | John M

It has been my experience that the standard Fr4 material (Tg 135c) will discolor when processed at the new higher temperatures required for the high tin alloys... We have been using the High Tg Fr4 (Tg 170c) for many years to ensure this does not hap

What is the best way to remove OSP coatings.

Electronics Forum | Tue Sep 11 22:52:18 EDT 2007 | davef

Here are some options for removing OSP coatings from pads of the BGA substrates. * Leave the substrates in storage for 13-14 months. Shelf life of OSP coating is ~12 months, depending on the product. * Wash the substrates in your aqueous washer. Ea


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