Electronics Forum | Tue Sep 11 19:04:28 EDT 2007 | hakerem
Hi Shrek - Not sure why you think adjusting dwell time and preheats is a sales pitch, but I do appreciate your candor. These are proven, widely used techniques for attacking, eliminating and preventing the recurrence of blowholes. Since it is so ea
Electronics Forum | Tue Nov 27 08:47:24 EST 2007 | ratsalad
The letter below was dated December 13, 2006 from Kester's Senior Market Development Engineer. I guess since then they have moved production back to Mexico. We no longer use EM907 as our primary Pb-free paste so I haven't seen any containers in a w
Electronics Forum | Wed Jan 30 12:53:58 EST 2008 | tonyamenson
In approximately one month I am installing 2D at our DEK print station. We are going with the basic (cheap) software options and 2D camera. After it is up and running we will determine if it is indeed useful. At that point we will decide on the adva
Electronics Forum | Fri May 23 18:55:20 EDT 2008 | gregoryyork
This is one of the biggest mistakes with the Lead Free process. We have all listened to the 'industry experts' and followed their advice and unfortunately got it wrong. Keep the dwell times (dependant on alloy selection) the same as Leaded so you are
Electronics Forum | Mon Mar 02 00:38:35 EST 2009 | sachu_70
Hi Jorge, The success of such production purely depends on process control. One needs to first understand the board layout in detail, and evaluate any critical components for their temperature handling capabilities. Remember, you are dealing with com
Electronics Forum | Sat Apr 04 03:24:41 EDT 2009 | monduran
Our company is in the market to replace the $50 toaster oven we use to reflow boards with something that can actually achieve even temperature and a proper reflow curve. We are a RnD type company and have no need for volumes. Though we have some heav
Electronics Forum | Wed May 13 03:22:26 EDT 2009 | J.Hall
We use SAC387 (or 96SC) and I found that the SelectX was only marginally effective and that other factors (varying the wave height mainly - we use pallets) affected bridging more. Also, because we run different products at the same time through the
Electronics Forum | Fri Oct 09 10:57:25 EDT 2009 | clampron
Omid, I have used the DRS24 for many years and have had similar problems with what you are talking about. I do not have any documents but I will tell you what I have seen. It sounds like an inconsistant collpse of the BGA. If one side of the BGA col
Electronics Forum | Wed Jun 08 10:57:20 EDT 2011 | pcbrookie
We recently got our last BGA X-Ray results back (no X-ray in house yet) and had more than one board/BGA look like the attached image. The balls on one corner are completely collapsed (so much so that bridges appear) and raised on the opposite corner
Electronics Forum | Thu Feb 07 12:37:42 EST 2013 | phase1
Resistor/Caps using package library Match-45% White pixel solder-25% search window-25% Tant caps custom teach checking for pattern/value Do you also put a polarity band check in there or just check the value and click the polarity box? same passing
