Electronics Forum | Thu Aug 10 13:27:29 EDT 2017 | dilogic
I prefer simple sequential P/N system. We use digits 0-9 and english aplhabet (total of 34 characters). Letters I and O are ommited to avoid mix-up with digits 1 and 0. P/N is 6 characters long - long enough to cover ~1.5 billion parts but short eno
Electronics Forum | Fri Aug 11 22:14:59 EDT 2017 | dawson
Hi Adonys, What's ICP 1-3? Do you mean IPC? 1. Excess Plating- no excess, but filled with something which generated in the process of copper plating. 2. Dark Vias - it's oxidized. and the solder mask printing is not aligned. The board is failed. M
Electronics Forum | Mon Aug 14 03:25:51 EDT 2017 | spoiltforchoice
There is no solution in above case, this is > caused by the PCB design. There are no > thermals on the pads connected to the copper > poured area. So the other pad reflow first and > lift the component. Yes, this. You could try playing with
Electronics Forum | Mon Aug 14 12:46:41 EDT 2017 | deanm
Any of the comments so far could be valid. To add my opinion, it looks like the pad size is too large. A smaller volume of solder will pull less than a larger volume. If you can't change the pad sizes, then the next thing to try is to get another ste
Electronics Forum | Thu Aug 17 12:18:40 EDT 2017 | cyber_wolf
I do not see anything obvious that would cause a thermal mis match. Regarding reflow profiles reducing tombstoning, Unless there is something wrong with your paste or you are running smaller than 0402's, I have NEVER seen a reflow profile reduce tom
Electronics Forum | Thu Aug 24 00:05:14 EDT 2017 | heros_electronics
The first reply from Tsvetan Usunov already > answered your question - there are no thermals > for one side of the chips. > > You can try to > reduce the phenomenon by using different solder > pastes, tuning your soldering profile or even > swi
Electronics Forum | Sat Aug 12 11:55:52 EDT 2017 | sankarseptember
We are facing component Drop on second side of the reflow.We are using Senju Reflow oven..Profile judgement was within in the standard.All the component Drop occur in between last heating zone and cooling Zone.The dropped component is ICC 525FL5 SOP
Electronics Forum | Thu Aug 24 23:20:22 EDT 2017 | micropak
We often do double sided SMT assembly, never had issues with smaller components. However, we apply glue to heavier components like inductors, SD card sockets etc. For this purpose, we have a glue dispensing machine inline after the solder paste prin
Electronics Forum | Thu Aug 17 21:56:05 EDT 2017 | v037022
Dear experience members, Now we are using permelex squeegee blade and we do cleaing it after printing 24 hours. Actually, it took very long time to clean. we need to take out one by one screw and use bemcot paper/ alcohol to clean solder remaining on
Electronics Forum | Wed Feb 14 16:44:01 EST 2018 | cbart
Probably to late for ya, but: -Center support -mesh belt and conveyor (have the mesh is nice for 1st side runs to keep the board flat. -N2 capable, in case you need it -on board profiling -smema if needed -board drop detect (sensor at input and exit)
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