Electronics Forum | Sat Apr 21 12:06:43 EDT 2007 | Cmiller
I coated three other bare boards on one side this morning from two different suppliers. Two of them had exceptional adhesion and one was so-so. I ran them through the reflow oven, coated them and got the same results on the other side, so it does not
Electronics Forum | Wed Aug 01 18:14:13 EDT 2007 | swag
We had the same trouble. We baked our boards out but the delamination continued very random. One board would be fine and the next was a nasty explosion of delam. Switched material - no problems since. I never found out the technical reason behind
Electronics Forum | Sat Jun 06 15:14:35 EDT 2009 | ysutariya
If the concern is the increased moisture absorption associated with lead-free capable materials, you probably have the most experience with phenolic materials like Isola IS410 or 370HR. The best move would be to switch to an IPC 4101/99 or /124 mate
Electronics Forum | Fri Feb 24 10:21:59 EST 2006 | Board House
TM, When picking a material for your lead free assembly you need to think about a couple of things, The standard Material in the US that is being used is running 140 - 170 tg. material. But for lead free assembly you need to focus on is Decomp tem
Electronics Forum | Sat Apr 21 08:26:57 EDT 2007 | Cmiller
Has anyone experienced a problem with conformal coating adhesion to IS-410 boards? We are having problems with one suppliers boards. IS-410 boards from other suppliers are fine and all FR-4 boards that I have looked at are fine. We are using Conap
Electronics Forum | Tue Aug 22 13:05:32 EDT 2006 | Board House
Hi CP, From a PCB manufacturing side, all of our product is Lead free / RoHs compliant if it has a surface finish other than Hot Air. To be ROHS compliant and Able to with stand Lead Free Assembly, this is where the board house would need to switch
Electronics Forum | Wed Feb 28 14:48:41 EST 2007 | jax
I doubt it's the board house. Check the Laminate being used. When you find out that the laminate is IS410, search the forum for time and location for the next "RoHs Compliant PCB Delamination Support Group" Some of the locations are hard to find but
Electronics Forum | Mon Apr 23 14:05:07 EDT 2007 | Cmiller
Dave, we have the same issue running a new bare board through the oven with no paste. If there is an imcompatibility with our flux would it still manifest itself when there is not flux? Im sure there is some residual flux in the oven all the time. We
Electronics Forum | Thu Apr 26 16:47:52 EDT 2007 | Cmiller
Is anyone using standard FR-4 material for ROHS? All I have ever seen to indicate the need to go to a high tg/td board is that the material may fail after repeted rework. I have a customer that is trying to use IS-410 and it is causing electrical pro
Electronics Forum | Wed Jul 11 14:48:25 EDT 2007 | rgduval
My boss just received some info through a design mailing list that he's on claiming that FR406 is not RoHS compliant based on the limited number of processing cycles at RoHS compliant temperatures. I would guess that this is related to the relativel
