Electronics Forum | Wed Sep 21 16:23:36 EDT 2005 | 14367
I was going to ask the same question. As was mentioned, it depends on the classification of product. If it's IPC Class 3, with a requirement for high reliability, I'd want the OEM manufacturer to have a defined statement on this issue for more that
Electronics Forum | Thu Jun 15 13:41:12 EDT 2006 | patrickbruneel
Yes there is RoHS certified ink it just cost twice as much as the regular ink. Just kidding Some people ask for RoHaaS compliance on cardboard boxes, pencils etc. What a mess $%^$ To answer your question, Ink is made from ethanol (ethyl alcohol) and
Electronics Forum | Wed Mar 12 10:26:10 EDT 2008 | realchunks
Why would a board failure related problem be a process problem. I agree most companies believe EVERY problem is a Proces Problem, but in the real world we know this is not true. A pad lifting means your solder joint was able to rip it off the boa
Electronics Forum | Wed Apr 23 21:34:24 EDT 2008 | fowlerchang
It is CSP reliability issue, which is the mobile CPU from Spreadtrum. All the tests passed and shipped to customer. They assembly them and tested but failed. After they reflow this CSP with hot air gun, some of the boards passed. We got some board
Electronics Forum | Sat Aug 16 08:15:27 EDT 2008 | davef
We are unfamiliar with yellow penetrant. Red is common, as you say. There are couple of green penetrants out there. Some red penetrants contain yeasts [eg, Calcofluor Yellow, Azosol Brilliant Yellow 6GF, etc] that fluorese yellow, but that's not what
Electronics Forum | Tue Apr 13 08:21:05 EDT 2010 | esca
Hi manchella, After ATC test, two different failure modes can be present: solder FATIGUE (into bulk) or BRITTLE INTERMETALLIC fracture. So, first you have to verify this. Moreover, which brand of SMT paste have you used ? The crack into solder joint
Electronics Forum | Mon Mar 18 11:25:24 EDT 2013 | cyber_wolf
I was at an SMTA meeting Friday. One of the topics of discussion was nano coatings. 1. Nobody wants to talk about where the coating goes as it wears off. 2. There are different types of nano coatings : Chemically bonded which involves a special bon
Electronics Forum | Mon May 09 11:29:05 EDT 2016 | jpal
I wanted to bump this up. I am having the same problems. I cannot convince folks it is a solder mask issue and not our process issue, even though it shows up after wave and wash. I can heat the boards and even send them back through the wave preheate
Electronics Forum | Tue Sep 25 23:09:23 EDT 2018 | franknguyen
Hi, We are PCBA production company which factory's located in Vietnam. Somtime, we have to analyse failure of product to find out the root cause (ex: Micro-crack of solder joint under BGA IC...). We are searching labs around Asia (Vietnam, Malaysia,
Electronics Forum | Sun Jul 06 10:07:03 EDT 2003 | MA/NY DDave
Hi Sam, Great answers so far. Let me take a stab at a few of your questions. Q1. whether this is named Pososity? I can't tell from your description. Several companies and the IPC have porosity tests to see if the Gold has good coverage of the und
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