Electronics Forum | Tue Jul 22 20:38:28 EDT 2003 | Paul T.
Have the PCB fabricator use a conductive paste to fill the vias and then finish by plateing over the via. Make sure it's coplanar to the side they're on, usually secondary side for discretes. PT
Electronics Forum | Wed Feb 26 13:29:32 EST 2003 | sergiovito
Dear Sirs, We are studying the possibility to produce printed board in house - onluy for prototyping needs. Does someone have experienced this kind of solution? Is this profitable? Thanks in advance!
Electronics Forum | Mon Apr 07 22:07:25 EDT 2003 | davef
It depends on the carbon polymer that the fabricator printed on your board. It could be: * No wave soldering * Wave soldering with a peelable mask * Wave soldering ... probably one of the latter two. Watch it. Some temporary masks can affect the
Electronics Forum | Fri Apr 25 08:48:25 EDT 2003 | davef
If what you say is accurate, two thing come to mind: * Pads on the board are incorrect for the tombstoning components. * Profile is different on the individual pads of tombstoning components. We have heard of, but never seen, components [tants] that
Electronics Forum | Thu Aug 21 20:39:09 EDT 2003 | davef
You have one option: Take the boards to the fabricator that build the board and ask him for $20k.
Electronics Forum | Fri Aug 22 09:44:45 EDT 2003 | davef
Kenny: Since you need to use water soluable flux and can't use no-clean, consider asking your board fabricator to plug the via.
Electronics Forum | Tue Oct 07 02:18:13 EDT 2003 | iman
Hi Experts, Pls help advise what is the expected range of PCB gold thickness over Ni (for ENIG/Electrolytic fabrication processes)? any referrence standards set by the IPC?
Electronics Forum | Sat Nov 08 08:16:45 EST 2003 | davef
We saw this quite a bit, I want to say 5 or 6 years ago, but it's probably more like 10 years ago. It's caused by poor solder mask crue. Talk to your board fabricator about solutions.
Electronics Forum | Thu Nov 13 20:48:04 EST 2003 | davef
There a number of studies like this published by component fabricators. Many can be found on the net. For instance: http://www.amd.com/us-en/assets/content_type/DownloadableAssets/Pb-free_Board-level_reliability_study.pdf
Electronics Forum | Thu Apr 15 17:48:15 EDT 2004 | davef
When we see dewetted solder on pads, we sprint to get sections done, in order to determine if over-exuberant pumice scrubbing by the fabricator has buried material in the copper.
