Electronics Forum | Fri Feb 09 16:11:31 EST 2007 | MAC
Not an expert on PCB manufacture, but it looks like mask from other side of PCB flowed through vias before this side was masked. Is it possible previous vendor masked this side first, or used film-type mask which would not flow through?
Electronics Forum | Wed Dec 11 11:26:25 EST 2019 | SMTA-Norah
Yes, a polite complaint to our board shop later and the next batch didn't have that problem at least. I'm not convinced it's an ENIG issue as there was variability panel to panel in the first place.
Electronics Forum | Fri Mar 03 13:41:43 EST 2000 | pr
Is it o.k. to clean my glue stencils in the same IPA stencil cleaner I use for solder paste? Also if anyone with experience in stenciling glue can lead me away from first time pitfalls I would appreciate that as well. thanks in advance
Electronics Forum | Fri Mar 03 13:41:43 EST 2000 | pr
Is it o.k. to clean my glue stencils in the same IPA stencil cleaner I use for solder paste? Also if anyone with experience in stenciling glue can lead me away from first time pitfalls I would appreciate that as well. thanks in advance
Electronics Forum | Fri Jan 04 14:31:35 EST 2013 | tombstonesmt
Thank you guys. I will check this stuff out. It > quite possibly could be something we have done > wrong. Thanks again for the feedback Add anti seize to the threads. We do this to all of our nozzles when we first "tin" them with Active8. We usua
Electronics Forum | Fri May 23 23:45:38 EDT 2014 | edriansyah
Hi Evtimov. 1. yes both part and the process are lead free/RoHS 2. I ever did X-ray, the balls shape are good and I dont see any evident of head in pillow (but my x-ray machine is not too good) Head in pillow was also my first suspect. but after the
Electronics Forum | Tue May 16 15:16:26 EDT 2006 | Chunks
Not knowing your brand of Heller, I might suggest disconnecting the first cooling section to verify it's your heater fans. I just had a retro kit done to my Electrovert for a similar thing.
Electronics Forum | Thu May 29 17:18:51 EDT 2014 | island2013
whats the type of paset and the type of profile you're running. Doesn't look like enough heat to me on the first set of pics I see. Are you running ROHS BGAs on a lead profile?
Electronics Forum | Wed May 28 19:21:09 EDT 2014 | hegemon
Just from the look of things (a picture) I would first guess it is a contamination problem on the PWB. Check over all your handling practices. Make sure the PWBs are NEVER touched by bare hands. I would not rule out the Black Pad phenomena, but i
Electronics Forum | Tue Sep 16 09:59:26 EDT 2003 | James
I am having a problem with SOT23 moving off their pads during reflow. We did not have this problem yesterday. On the pads and surrounding area looks like a lot of flux spatter. I looked through the threads but they didnt help me much. I know what 3
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