Electronics Forum | Wed Jan 11 09:21:19 EST 2017 | rgduval
Do you have some pictures of the condition that you are facing? Your description of the issue sounds more like dewetting, rather than cold solder. A picture would help us better understand what you're facing. Cheers, ..rob
Electronics Forum | Tue Nov 05 09:57:45 EST 2013 | cuperpeter
Hello All, We have a problem with dewetting of solder paste. Problem is most visible on the pads without components (see attached pictures) and occurs randomly, 20% of PCB's. Pcb supplier sent us a cross-section of pads with thickness of Cu, Ni and
Electronics Forum | Wed Jul 26 11:56:40 EDT 2017 | rgduval
Ah...the joys of subjective analysis! At a glance, these pictures look fine to me. Other than the IC's, which you've indicated were masked, and, maybe R12 in the last picture and CC1384 in the first image, coating looks uniform and well distributed
Electronics Forum | Mon Oct 12 15:51:47 EDT 2015 | davef
IPC-A-610E-2010, Acceptability of Electronic Assemblies, 8.3.4 Castellated Terminations talks to the acceptability of solder connections on components like yours. It’s tough to say from the pictures, but I’d say your issues are: Missing solder: Plat
Electronics Forum | Tue Jun 06 11:47:33 EDT 2017 | stevezeva
Hi Zac, was that board finished with tin/lead HASL or leadfree/HASL? Also what type of flux were you using? Just because a board is fresh out of sealed packaging doesn't necessarily mean that it's going to solder well. The picture that I've attached
Electronics Forum | Fri Feb 23 11:50:14 EST 2024 | emanuel
Unfortunately it is not possible to post pictures here. It looks the same as in these photos: https://yic-assm.com/wp-content/uploads/2019/06/dewetting-1.jpg https://res.cloudinary.com/engineering-com/image/upload/v1577777622/tips/20191216_174750_1_a
Electronics Forum | Wed Aug 18 21:18:00 EDT 1999 | Dave F
| WE ARE CURRENTLY HAVING PROBLEMS REFLOWING BOARDS WITH WHITE TIN PLATING. WE ARE NOT GETTING GOOD WETTING ON THE PADS. | WE HAVE CHECKED THE REFLOW PROFILE AND TRIED DIFFERENT PASTE'S. | WE THINK THERE MAY BE CONTAMINATION OR OXIDATION ON THE PADS.
Electronics Forum | Thu Mar 06 11:36:37 EST 2003 | O' Connor
Hi, I'm experiencing a problem on a standard part made many times before -Ni/Au finish PCB, Reflow 100% SMD parts. After reflow the gold on the pads does not fully fuse with the solder paste it remains intact on the extremities of the pads, it seems
Electronics Forum | Mon Aug 25 15:40:58 EDT 2008 | dyoungquist
I am seeing poor quality solder joints, mostly on 0402 components. The problem is that while the pad on the pcb is getting fully wetted, the solder is not flowing up the sides of the 0402 component, i.e. the 0402 lead is somewhat de-wetting. The re
Electronics Forum | Wed Oct 24 18:08:02 EDT 2001 | davef
1- DF1: WOW!!! How do people get these cool toys? CB: I am with the University at Buffalo Electronic Packaging Lab. http://www.packaging.buffalo.edu We have pretty much everything that is sold on the market as well as Laser inspection technologies we
