Electronics Forum | Tue Oct 27 13:56:36 EDT 2009 | julie331975
I work for a CEM. We are having some quality issues with some pcb's that came from China. (I know, big surprise) Can anyone with pcb manufacturing experience look at some pictures I have and give me an opinion as to what could go wrong in the pcb man
Electronics Forum | Mon Dec 30 02:05:08 EST 2013 | mysmt
Hello, I am facing intermittent delamiantion effect in FR1 type laminate after wavesoldring.Bath temp. is 255 degees cel.Preheater temp is also controlled (110 deg cel. on top side before passing on solder bath). Thanks,
Electronics Forum | Wed Jan 01 21:58:31 EST 2014 | mysmt
Hi , Wish you a happy new year. Find attached datasheet of laminate. Thanks,
Electronics Forum | Thu Jan 02 23:39:33 EST 2014 | mysmt
Hi, FR1 laminiate used is only for single side type and THD plating is not used. I have also attached laminate manufaturer's datasheet. Thanks,
Electronics Forum | Mon Dec 30 08:14:45 EST 2013 | jax
I was unaware of any Pb-Free process capable FR-1 laminate... not to mention capable of Though Hole plating that would be expected when wave soldering. What is the Td and Z-expansion for the laminate you are using?
Electronics Forum | Mon Jan 06 17:37:54 EST 2014 | hegemon
Make sure you are providing an adequate moisture bake out prior to wave soldering. It sounds moisture related since is so random. I would suggest perhaps 120C for a minimum of 8 hours to drive the moisture out, and then complete your wave soldering
Electronics Forum | Tue Apr 24 21:00:58 EDT 2018 | marlonbc
Hi All, Would just like to course through this concern on a product that we are contracted to assemble. It is mainly used for an automatic hand sanitizer dispensing product. By design there is a restrictive value of current that it needs to dissipat
Electronics Forum | Tue Nov 20 12:48:40 EST 2001 | tony_sauve
We recently experienced a problem w/voids (up to 65%) in uBGA solder joints. The only joints that have the problem correlated to pads which had blind 0.006" via's in them. The via's only extend down 2 layers, of the 18. 21 BGA's on the PCB, only expe
Electronics Forum | Wed Jul 27 05:31:09 EDT 2022 | lindsaylbb
Aluminum shreds were found inside the tooling hole after depaneling. We ruled out contamination because the tooling holes were covered during depaneling. Out of three holes, only 2 holes with positioning columns inside have aluminum shreds residue.
Electronics Forum | Wed Nov 10 02:13:32 EST 2004 | Grant
Hi, We are thinking about starting to use via in Pad, for both BGA and 0402 and 0201 components. Does anyone know how this would effect production. Obviously PCB production is not difficult, but this should only effect production and assembly. R
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