Electronics Forum | Tue Jun 21 16:03:33 EDT 2005 | jdengler
The 2 issues are: -1 Enough flow to keep all fumes from reaching people. -2 Consistent amount of heat removal to keep the temperature steady. If the 45 CFM is steady and keeps all fumes away from people all is well. Jerry
Electronics Forum | Tue Jun 28 13:23:56 EDT 2005 | Bob Gilbert
Matt, Try a cooler profile by simply speeding up the conveyor by 10%. The difference may be the temperature the pads are reaching between the HASL boards and the Au boards. Are they the same thickness?
Electronics Forum | Wed Jun 29 14:36:11 EDT 2005 | Steve
A customer of mine is using Chemtronics (Circuit Works) CW3300 Overcoat pen. This is an acrylic conformal coating. It cures at Room temperature. They need something similar that can be UV cured in a pen form. Any suggestions?
Electronics Forum | Tue Jul 12 03:58:46 EDT 2005 | Chris Ong
Hi Bob, I heard that they have low temperature solder that is able to tackle heat sensitive component. Some of my industrial friend also mentioned that they some sort of low cost material alloy -SCS7?? Is that true? Thanks Chris
Electronics Forum | Thu Jul 14 03:01:37 EDT 2005 | fctassembly
Chris, The Asahi SCS7 is Asahi's attempt at copying the SN100C and is a tin/copper/silicon alloy that melts at 227C so no, it is not a low temperature lead free alloy.
Electronics Forum | Wed Jul 06 03:23:14 EDT 2005 | javi
We start to get mixed component leaded and lead-free, we still using leaded solder paste in the SMT process. Do you see this a problem to use leaded process 179 deg celsuis temperature reflow on RoHS compatible lead-free components with same specific
Electronics Forum | Wed Aug 10 16:04:09 EDT 2005 | rrylande
I am concerned about delamination and other modes of damaging the board itself. Am I mistaken to believe that raising the entire board to near reflow temperatures (during the repair of a single BGA) may damage the quality of the board?
Electronics Forum | Sun Aug 28 03:22:35 EDT 2005 | Leo_dektec
We have had this experience in China. Some of our customer produce aluminium radiator. They always ask us to design this type reflow oven for it.Because the large desire of the heat,we have to design the oven at a higher temperature.It's almost meet
Electronics Forum | Fri Sep 02 05:41:51 EDT 2005 | Rob
Is your oven suitable for Lead free temperatures & can it achieve a decent profile across your complete range of boards? AOI will need to be looked at too as the joints are not as shiney. Cheers, Rob. PS. Where's Thisbie?
Electronics Forum | Thu Sep 08 14:25:20 EDT 2005 | kris
what did you reprofile to ? did you increase the peak reflow temperature ? can you tell form what to where ? I bet your vendor told you process guys that it was " drop in" for a tin leaded plated part.
