Electronics Forum | Thu Dec 06 23:34:25 EST 2001 | Beny
Pls. help. I�ve problem with non-wetting defect at capacitor termination. I have faced this problem at the 2 kinds of termination. One is chip capacitor 0603 that its outer termination surface composed with 100 Sn (Lead free) and another one is Sta
Electronics Forum | Mon Sep 29 16:38:07 EDT 2014 | rgduval
These papers are a good place to start when learning about profiling: https://www.smtnet.com/library/files/upload/374_RSS_vs_RTS_revised_12-99_(no_pics).doc http://www.ipcoutlook.org/pdf/best_practices_reflow_profiling.pdf If you're having a lot o
Electronics Forum | Mon Oct 30 16:00:30 EST 2000 | Finepitch Services
Sal, I kind of assume you have paste there to start with... Because sometimes the edge components do not have paste applied caused by the bottom support in the screen printer etc. And if that is the case for one direction, the other direction applie
Electronics Forum | Tue Dec 04 10:30:16 EST 2007 | slthomas
Q: The question I have is do they wet in wave solder, and if they do, why does it matter what happens to them in reflow? A: Yes, but somebody here don't agree with me that the glued part need help from wave to get the good wetting. They are wrong
Electronics Forum | Tue Apr 14 09:38:07 EDT 1998 | Earl Moon
| We are having some difficulty soldering a 240 pin Altera device. We use Alpha WS-609, a very generic profile for that solder paste, and a 6 mil stencil with laser cut apertures (1:1 ratio). This is a 20 mil pitch device (aperture size is 10 mils X
Electronics Forum | Sat Oct 18 09:30:43 EDT 2008 | hussman
Sounds like a part problem. You can SOMETIMES over come this with a hotter profile. We see this a lot with brokered parts. Seems like a lot of people are rejecting parts because a lot of companies haven't perfected their RoHS process, yet produce
Electronics Forum | Mon May 09 16:44:33 EDT 2011 | dcell_1t
Hi, We have been struggling with an issue of non wetting on a QFP (Renesas - 256, Sn90Pb10) but the issue "desapears" sometimes for a while and then back again suddenly. This is the scenario: Component: QFP 256 / Renesas / Sn90Pb10 / 0.5 mm pitch S
Electronics Forum | Thu Aug 05 09:23:36 EDT 2004 | blnorman
We're using a RC filter network that we're having solderability problems with. There are 4 RC pairs with 2 ground connections (this is a leadless component). The problem we're having is non-wetting of one of the castellations (9 of the 10 scallops
Electronics Forum | Fri Mar 21 20:24:13 EST 2003 | msimkin
Has anyone had success in soldering these devices, in particular devices from a company callede Pycomp. They are 8 way 0402 sized terminations. I have experemented with the printing process, placement verification & reflow profile. Unfortuanlty, I am
Electronics Forum | Thu Sep 23 23:42:52 EDT 2004 | KEN
The LF pastes will have virtually NO wetting spread. This is normal. LF mobilities are virtually non-existant with SAC alloys. However, the addition of varrying amounts of silver can (and does) improve mobility but, this comes with a price (paste
