Electronics Forum | Tue Apr 27 16:44:05 EDT 1999 | Chrys Shea
| | Has anybody had experience wavesoldering 1 watt 2512 resistor packages?? I know it can be done, but are there reliability issues? | | | | We are in the middle of a new product and the question was posed to me "Can we use 2512 1 watt resistors o
Electronics Forum | Tue Jan 12 17:51:41 EST 1999 | Tom Gervascio
I've been using selective soldering process for about 18 months. The major problem concerns tight spacing- the distance between the SMT pads to be masked and the thru hole leads to be wave soldered should be no less than 0.150 inches. Keep the wall
Electronics Forum | Thu Dec 26 16:51:47 EST 2002 | davef
First, an earlier poster suggested using DI water. We are NOT excited about DI water with a NC fluxer, unless DI water is the proper flux thinner. Second, as you inplied, the maintenance steps you take should vary according to the amount of time th
Electronics Forum | Thu Nov 17 21:46:48 EST 2005 | C. Kolokoy
With DIP type components, a sub-par fluxing method (foaming a no-clean), and a chip wave where one is not needed are formulas for bridging and insufficient wetting. If you have SMD's on the wave solder side of the board greater than 0603, and no SOT
Electronics Forum | Tue Aug 22 21:00:39 EDT 2006 | davef
National says: [ http://www.national.com/packaging/llp/faq.html#faq_manu ] Manufacturing FAQ's Are there any precautions that need to be taken with the LLP package? It is critical to follow National�s guidelines for successful surface moun
Electronics Forum | Tue Sep 18 21:37:06 EDT 2012 | vergara1
Hi Manoel, I want to make sure I understand what you are talking about; reading the reply,along with your replys it almost sounds as if we are not talking about the same thing. In your picture I'm seeing a SMT diode correct? You are talking about th
Electronics Forum | Fri Feb 18 21:34:36 EST 2000 | gwen
We always have big power modules on the board,they are very heavy,so we use the screw to fix the soldered module,then we destroyed the solder joints.If we screw them first, the board can't be wave soldered. My questions: whether we should use the s
Electronics Forum | Wed Feb 16 07:55:19 EST 2000 | Dave F
CK: I hear you about pads. Most secondary side SMT pads are primary side SMT pads that are on the secondary side. This only matters when boards are wave soldered. Rather than changing to larger components, consider a bigger fight than that ... ge
Electronics Forum | Thu Feb 10 09:43:42 EST 2000 | Glenn Robertson
Russ - I agree with Dave and Wolfgang that the boards are the top suspect. The idea of "rework" from Gold to HASL sounds scary. Are you sure the Gold is electroplate and not immersion? Resolve that and then check the archives for "dark pad" or
Electronics Forum | Thu Jan 04 17:26:17 EST 2001 | Cory
We're going to begin conformal coating a few of our assemblies as required by our customer. We're using Kester No clean paste and will use cotton gloves to keep the boards clean while handling. My question is: Do we need to clean the boards prior to
