Electronics Forum | Fri Mar 03 14:40:22 EST 2006 | amol_kane
i think a more important issue here would be the reduction ratio. as LF solders have a higher surface tension, they do not flow as well as their leaded counterparts. therefore the stencil design may have to be changed (hence a new stencil) if the red
Electronics Forum | Thu May 30 10:31:03 EDT 2002 | robbied
Hi Yannick. This is an issue that we are just recently getting into but here is some ifo that I have gathered so far. I have seen/ used 2 different rework machines. The one we have bought is a 'PACE TF2000' which was at the lower cost end of the mar
Electronics Forum | Thu Sep 07 03:57:39 EDT 2000 | Steven Cheung
Does anyone know of a freely-available document which discusses the main considerations of BGA assembly and inspection (x-ray?). l need to know about pad sizes and inspection standards and when to underfill and when not to etc.. l am looking at ass
Electronics Forum | Wed Sep 24 08:34:57 EDT 2003 | stefwitt
Even when you run a board several times, the machine may not make the same travel path every time. This in itself does not create a problem, but the vacuum on the nozzles could be different, dependent on the configuration of components on the heads.
Electronics Forum | Wed Feb 09 12:28:58 EST 2005 | Valerie
We have been pretty successful with screen printing glue, however the smallest component we now glue is a 0805. We had many problems using our Gemini II to put down glue dots for a 0603, so we altered the pads to do double-side reflow. As our own int
Electronics Forum | Wed Jan 12 13:42:19 EST 2011 | dwonch
Hi All, I'm hoping there is a PCB expert or two hanging around. We're having some solderability issue on our boards. The finish is ENIG but it doesn't seem to be related to the finish process itself. We did SEM and EDX analysis and found aluminum an
Electronics Forum | Thu Mar 31 12:13:28 EDT 2022 | cbart
That is a tough one because of package size I agree, as noted previously it would be good to know what the current PCB pad layout is. first thought does go right to an adapter board of course! is this a volume build or just 20-50 pcs? dead bug and ha
Electronics Forum | Thu Nov 11 17:04:31 EST 1999 | Michael Parker
I am looking for advice on sourcing a x,y digitizer to create pick and place files, off-line, rather than programming with the machine. I could use original gerber data or create the placement coordinates with the digitizer. Also, references to equip
Electronics Forum | Tue Nov 28 21:16:17 EST 2006 | davef
J Rose at EMPF says: The introduction of no-clean solder fluxes in electronics manufacturing has given rise to greater levels of solder balling simply because the opportunity to remove them in the wash process does not exist. They are typically cause
Electronics Forum | Tue Sep 18 15:35:23 EDT 2001 | jschake
A laser cut stainless steel stencil was used exclusively for the evaluation of the complete 0201 assembly process, which addressed printing, placement, and reflow. However, I have also conducted off-line 0201 print tests using a nickel electroformed
