Electronics Forum | Tue Mar 01 15:13:22 EST 2011 | felixgutierrez
Hi Everyone. I would like your input in regards to lead free solder paste lead free. Which one is the most reliable solder for BGA's and BTC's (QFN). I have used different type of solder and on some of them i get big voids on BTC's and other one i g
Electronics Forum | Wed Jun 18 08:51:34 EDT 2008 | ldavis
We actually found the opposite to be true. Boards processed in VP are much cleaner than those processed in our air-only convection oven. We tested 5 lead free solder pastes upon implementation and found that the type of paste does affect the number
Electronics Forum | Mon May 22 14:31:58 EDT 2017 | sumote
I agree. Trim the leads before insertion, then raise the pot height. With the information given, this is most likely your solution. Our machine has a dam wall on the rear of the solder pot that raises the height on the solder pool. I would make sure
Electronics Forum | Fri Jun 24 07:02:35 EDT 2005 | davef
Problem 1: Solder shortage * Stencil aperatures [except the heat slug] should be 1:1 with the board. * Stencil should be 5 thou thick laser cut. * Board should be 1:1 with the component * Print should look good. Problem #2: Bad connection between p
Electronics Forum | Tue Apr 19 13:23:33 EDT 2016 | vchauhan
We are using Vicor SMT J-Lead VI Chip which is big component on the bottom side. The manufacturer recommends to have 6 mil stencil but the customer required 10 mil stencil. The PWB has gold contacts on both sides. We noticed some mini solder splashes
Electronics Forum | Fri Jul 03 09:29:19 EDT 1998 | Dave F
| Hi all. | I am trying to put one 20 pin thru hole connector along with the smt components on the PCB. I would appreciate if somebody can guide me in getting thru this process. I also need to know how much bigger the holes on the screen or stencil
Electronics Forum | Wed Apr 08 15:07:10 EDT 2009 | waveroom
When or before evaluating your paste you might want to find out how Readily available it is? From where it is coming to you? (Freight charges).. And how reliable the distributor is that is selling it to you. Nothing worse than running out of paste an
Electronics Forum | Mon Jun 05 19:08:08 EDT 2017 | zsoden
Thanks for the suggestions, Caurbach. We do have the occasional lead jumping out even at this length, hence why we've been hesitant to cut them shorter. I have the wave nozzle to PCB distance set as per the machine instructions (4mm I think?). I ce
Electronics Forum | Thu Oct 23 09:49:18 EDT 2008 | davef
We're not sure the specifics that BLT Circuit Services Ltd referenced, but many companies use dross reducing agents in their wave solder pots. Among dross reducing agent suppliers: * Fry [4100 Sixth Ave, Altoona, PA 16602; 814-946-1611 F814-944-8094
Electronics Forum | Mon Apr 05 16:12:16 EDT 2010 | dyoungquist
We are installing via reflow soldering a crystal that has 2 pads, 1 each end. They are flat pads on the bottom of the part with a small area of the pad looping around and up the side of the crystal on the end. Inspection of the cyrstal under a 40X
