Electronics Forum | Wed Jan 30 17:44:38 EST 2002 | davef
The gold is compatible with your solder. Gold will dissolve in your solder very quickly. Assuming you have a fairly large [~ couple hundred pounds] solder pot, the gold will not, over the short term, affect the performance of the pot. The issue is
Electronics Forum | Thu Sep 24 06:30:28 EDT 2009 | cathtee
Is there any vision system to check for substrate crack?
Electronics Forum | Thu Sep 24 09:25:24 EDT 2009 | davef
What do you mean by "substrate?" Is it: * Semiconductor die * BT circuit board interposer Is the BGA package: * Encapsulated * Mounted on a circuit board
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
Electronics Forum | Wed Jun 25 03:49:17 EDT 2003 | M.DAttilio
Hello everyone, my company produce Alumina PCB. Till now we mount ceramic BGA on alumina substrate, but now it's hard to find ceramic components so we'd like to mount plastic BGA on this kind of substrate. Do you know problems about it? Please, if yo
Electronics Forum | Thu Nov 03 02:34:46 EST 2005 | Rosewood
We've recently encountered some problems with wire bond strengths. I'm looking for anybody that has had some experience with different types of substrate contamination and methods for cleaning. There is no visible contamination on the gold pads, bu
Electronics Forum | Thu Dec 10 03:37:29 EST 1998 | Youngho Song
Hi everybody? I heard that typical FR-4 would not acceptable for BGA application. What is the main reason? (thermal property? or CTE?) Sombody please answer me the requirement of PCB substrate for PCB application. Thanks. Youngho Song
Electronics Forum | Thu Dec 10 09:09:31 EST 1998 | Earl Moon
| Hi everybody? | I heard that typical FR-4 would not acceptable for BGA application. | What is the main reason? | (thermal property? or CTE?) | Sombody please answer me the requirement of PCB substrate for PCB application. | Thanks. | | Youngho Son
Electronics Forum | Thu Aug 12 00:17:15 EDT 1999 | DLKearns
Wanted to know if there was a good "to go by" tip other than the customers(if it helps current req.,10% of 30% of trace) requirements, about pits in the traces on copper plated ceramic substrates? More to the point how many is too many regardless of
Electronics Forum | Thu Nov 03 12:48:14 EST 2005 | Rosewood
We have some no sticks, but that is actually a good thing because we have NSD. During process control audits we found that pull strengths to the board dropped off. We build a military application that requires higher bond strenghts. Low pull streg
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