Electronics Forum: blister (Page 6 of 12)

Blistering issue, mixed LF/SnPb process

Electronics Forum | Fri Jul 28 16:36:37 EDT 2006 | chrisgriffin

Thats a great idea Doc. If we all listened to your suggestions, there would be zero defects in PCB manufacturing. I bet your using Bahodum solder which, I'm sure, is incapable of defects. Pavel, sounds like you can rule out reflow as the problem.

Water Absorption of PCB

Electronics Forum | Thu Feb 15 21:09:45 EST 2007 | Stephen- SMT engineer trainee

1. Can anyone tell me about the water absorption(wt%) among different PCB((i) RoHS, (ii)non-RoHS, (iii) Halogen free)), I am currently facing the problems of PCB blisters after reflow process. 2. Also, please suggest the baking period/time among dif

PC Board Guidelines

Electronics Forum | Wed Sep 19 17:36:16 EDT 2007 | slthomas

Like davef mentions, there are guidelines for both design and fabrication, not to mention assembly (which from the original post doesn't appear to come into play here). Not that I could improve on what dave has already shared, but it would be nice t

What caused this reflow issue?

Electronics Forum | Mon Apr 14 14:11:30 EDT 2008 | cyber_wolf

I dont know if this is related, but there appears to be a blister/measle in the upper right corner of the Q19 large pad. (upper right of Q19 as you are facing the photo) If your profile and paste is good, my bet would be that there is something wron

wave pallets

Electronics Forum | Fri Feb 20 02:09:23 EST 2009 | nibirta

Hi all, I have a question regarding some wave pallets having metallic traces of Titanium. The solder mask is blistering in some locations on the PCB and I am wondering if this Titaniumn may have an influence by incresing locally the temp. Also we ar

Vapor/ensolve flux cleaning

Electronics Forum | Wed Apr 28 12:08:02 EDT 2010 | tjg

Our latest designs are flip chip on flex based and we have issues with delamination/blistering. We know it is related to our vapor solvent (n-Propyl Bromide based) attacking an inner layer adhesive. Has anyone else ever heard of something like this?

High Relative Humidity and Blistering Issues in Assembly

Electronics Forum | Thu Aug 21 16:00:31 EDT 2014 | davef

This links to a NPL presentation on moisture removal from PCB http://www.npl.co.uk/upload/pdf/20140318_effect_baking.pdf Consider: * Focusing on preventing moisture contamination of boards, rather than removing moisture * There will be no standard

Part of PCB silkscreen turns yellow brownish

Electronics Forum | Thu Aug 28 23:15:44 EDT 2014 | phyllishwl

Hi all, Our production reported that they found 3 panels out of 53 panels with strange phenomenon after reflow. 1/ Blister / Delamination of PCB panels, 2pcs blister/delamination under solder mask, 1pc under Gold plating at Gold finger 2/ Silkscr

Re: PCB delamination

Electronics Forum | Mon Feb 05 17:18:53 EST 2001 | davef

Wha, Nellie!!! Delamination & Blistering IPC-A-600D Although it may occasionally occur because of a severe process breakdown, delamination and blistering occurs as a result of an inherent weakness of the material. Either condition represents a brea

High Relative Humidity and Blistering Issues in Assembly

Electronics Forum | Sun Sep 07 20:51:52 EDT 2014 | natashakt

1. Is the high RH environment consistently at 72% RH and 21.4 degrees Celsius? No, over the past 2 weeks I have recorded the highest at the moment: 67% RH at 22.6 degrees C and lowest (it is Spring not summer yet): 31.9% RH at 19.0 degrees C. Or d


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