Electronics Forum | Mon Sep 22 10:52:14 EDT 2003 | Carol
Is there a standard that tells you how many times you can replace a PBGA without reliability issues? I've read IPC-7095 (many times) and have not found a recommendation for this. We have Class 3 products.My thoughts are 2 times max. We place PBGAs
Electronics Forum | Mon Sep 22 16:00:43 EDT 2003 | Joe
Two BGA replacements (same location) and throw the card away is the rule we are following. Experience has taught us that anything beyond this and you'd be pushing it - specifically when your new PBGA's price is above $20.00. The biggest concern is
Electronics Forum | Tue Sep 23 18:48:57 EDT 2003 | ericsbrown
We have an application where we are applying a heatsink with a thermal tape that has pressure sensitive adhesive (psa) on either side. Does anyone know of an off-the-shelf heatsink press that we could use to apply a consistent, measured force for a
Electronics Forum | Thu Sep 25 10:27:45 EDT 2003 | davef
Datum: Many times the requirement for a heat sink is anticipated poorly by the designer. So, adding a clip becomes burdensome and too expensive for a respin. Other times, there is no off the shelf clip for the component, as you say. So, a well des
Electronics Forum | Thu Oct 09 13:27:47 EDT 2003 | MA/NY DDave
Hi Haverhill DavidF, SMTA, SMTnet, I should know this, since Dave does raise a good point that involves the Charge Coupled Model for how ESD creates an event. Be careful you don't blow those components as you seek to create higher and higher vacuum
Electronics Forum | Fri Sep 26 08:28:24 EDT 2003 | successmani
Thank you Russ for the information. One more clarification- I found that the %metal content in lead free paste is in the range of 88-89.5 whereas %metal content in Sn-Pb paste was 90% in general. What is the reason behind this reduction of %metal co
Electronics Forum | Thu Sep 25 16:01:25 EDT 2003 | denis
We bought a Ersa rework station (IR technology) recently and we found in trouble when having to replace BGA with metal heat sink cover. I am affraid that we will probably have to invest money again in a convection rework system. Does someone can refe
Electronics Forum | Thu Sep 25 17:35:28 EDT 2003 | denis
To be precise, the component is a Xilinx Virtex platform FPGA with 1152 balls. We also assemble some DSPs up to 1000 balls with metal cover. At best, we can remove the components but it is almost impossible to find a working solder profile using IR.
Electronics Forum | Thu Sep 25 22:36:41 EDT 2003 | fastek
It wasn't that long ago that your beloved UIC was attempting to charge $20K to license a GSM. Are you saying they don't have a license fee structure any more? I bet they still do. I feel the fees charged by the SMT OEM's are justified as many are as
Electronics Forum | Fri Sep 26 16:49:17 EDT 2003 | lysik
I just want a forum to track the bad apples. They are out their and people need to know who they are and the consumer should be fully aware of policies before you buy something. Sometimes they are unclear or the sales engineer tells fib. GenRad does
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