Electronics Forum | Fri Jan 14 12:59:07 EST 2005 | Dan Mendoza
I have used the rectangle shapes and round shapes with no noticible difference. The idea is to design the pads to accept the same solder volume per component. Components over two size pads will favor the higher solder volume side during reflow.
Electronics Forum | Wed Feb 02 16:24:14 EST 2005 | bobsavenger
I would like to know if anyone has an IPC specification for BGA's handy? I'm looking for specifics based on Classification. Roundness, %voids, size, etc. Please let me know if you have this. Thanks Bob
Electronics Forum | Wed Apr 27 13:50:01 EDT 2005 | russ
You will want the square in this case to be .013" with rounded corners (slight overprint). I do not see why you would need a type 4 paste for this. the aperture as it sits should release well but obviously there is something wrong.
Electronics Forum | Wed Apr 27 15:13:24 EDT 2005 | jdumont
If square apertures are supposedly better than round why arnt we using them for all BGA locations, even the larger ones?
Electronics Forum | Tue Jun 14 18:37:18 EDT 2005 | GS
On top to above suggestions,Round pad designe (where possible to get) helps to solve tombstoning pbm. Regards GS
Electronics Forum | Tue Aug 23 04:04:58 EDT 2005 | Rob
But one of the unique selling points of a Fuji has always been all that space you get to hide things in when the auditors come round.....
Electronics Forum | Tue Aug 09 06:23:04 EDT 2005 | dougs
can you just turn the buffer round, the control panel might be at the other side but thats not a big deal is it.
Electronics Forum | Tue Aug 09 10:38:45 EDT 2005 | SuMoTe
Water soluable dots will wash off after reflow. A water soluable liquid mask will work as well. dots are better for defined (round)holes, whereas the liquid mask works well with odd shapes.
Electronics Forum | Mon Feb 20 14:49:58 EST 2006 | pjc
Samir, I didn't get the e-mail unless I thought it was spam and erased it. The high-mass sensors are custom made for ECD. The round sensors on the OvenRIDER are the "process" or high-mass sensors. They are designed to never reach zone temnperature. T
Electronics Forum | Sun Feb 19 12:16:12 EST 2006 | slthomas
Where in the world are you? Is it naturally that dry and you'e trying to keep it up, or do you dry it to that state? 'round here 40-45 is the norm so we don't put much thought into controlling it.
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