Electronics Forum | Thu Jun 16 16:50:37 EDT 2011 | boardhouse
Hi Milroy, One thing to check is the FR4 Laminate being used - if this is a RoHs build is the correct FR4 being used by your manufacture. What layer count of board are you seeing the delamination on? Does you board shop Vacuum seal the packages wi
Electronics Forum | Wed Jun 22 02:30:33 EDT 2011 | boardhouse
if its a RoHs Assembly they should be using an FR4 material designed with higher TD to handle higher Assembly temps. 370HR,IT158, IT180, 4000-29 just to name a few that would be suitable. Standard FR4 material is not designed to handle the higher as
Electronics Forum | Sat Apr 21 14:50:17 EDT 2012 | edmentzer
We are using SN100C in both our wave and selective machines and have very good results. We also using it for ROHS hand soldering. It flows better than SAC305, the joints are shinny just like Sn63/37. We are looking into using SN100C as our paste b
Electronics Forum | Fri Mar 15 08:25:42 EDT 2013 | torch
looking for a bit of advice really, our current reflow oven (surfair 510) is in the process of slowly dieing so we are in the market for a replacement. I havent followed technologies on ovens for a while but im looking for something that is low to m
Electronics Forum | Fri Mar 15 15:34:37 EDT 2013 | anvil1021
In my experience used reflow ovens have been problematic. There are lots of adequate or better reflow systems out there that wont break the bank too badly....the N2 question, if you are going to be using solder that requires higher reflow temp than d
Electronics Forum | Thu Mar 21 16:45:31 EDT 2013 | dyoungquist
We have been using a Heller 1707EXL (7 zones + 1 cooldown zone) for lead free (ROHS) soldering since 2007 with good results. I wouldn't go any lower than 7 heat zones though. If I may brag a bit....The IPC-7095 revision C standard was released a fe
Electronics Forum | Mon May 12 04:26:00 EDT 2014 | gazelle
Hello - I am looking for a source to supply low thermal EMF solder - can anyone provide pointers ? In the past a cadmium - lead alloy was used for this, but these are banned (RoHs) ... - the aim is to minimize thermo-couples on a very sensitive 4 lay
Electronics Forum | Tue May 13 08:59:13 EDT 2014 | gazelle
Hello davef - could it be you are confusing low thermal emf (Seebeck coefficient) with low temperature solder ? I am looking after solder wire and paste with low Seebeck coefficient - cadmium based alloy was OK but banned in europe due to RoHs direct
Electronics Forum | Tue May 13 17:53:54 EDT 2014 | anvil1021
Hello Michel...this might be a bit of a battle finding the low thermal EMF material that you are looking for. The first one that comes to my mind is Bismuth Selenium Telluride, with either a nickel or cobalt doping agent. Silver went away from this
Electronics Forum | Fri May 23 09:27:37 EDT 2014 | emeto
Hello, these pads look so clean.....I am not sure you had a good solder connection there. I would check the following. 1. Is the part RoHS in a lead process 2. X -ray boards after reflow(I assume you will see head in pillow) 3. Check for board con
