Electronics Forum | Wed Aug 10 13:55:38 EDT 2011 | franxsmt
Hi all, I would like to assemble boards that have one side all SMD and the other side all TH components. I have no idea how to do it. Any help will be appreciated.
Electronics Forum | Thu Aug 11 09:18:18 EDT 2011 | blnorman
We used process 1 that dave detailed. We used screen print adhesive on one line and pin transfer on another. The adhesive dots were applied to the body of the component allowing the wave to form the solder joints.
Electronics Forum | Wed Aug 10 14:49:11 EDT 2011 | davef
There are several ways to assemble a board like you describe. Since you're asking this question, we assume that your production technology is limited. What tools, machinery, and equipment can you access?
Electronics Forum | Wed Aug 10 14:56:21 EDT 2011 | franxsmt
We have an SMT line (Screen Printer, P&P, Reflow) and a Wave machine.
Electronics Forum | Wed Aug 10 16:42:10 EDT 2011 | kahrpr
Not an easy question to answer with out seeing the board. There is selective soldering, gluing, maybe a wave soldering pallet. As DaveF said since your asking the question I would assume your shops expertise is limited.
Electronics Forum | Wed Aug 10 15:45:49 EDT 2011 | franxsmt
Maybe I was not clear in my original post. So we have boards that have SMD components on one side and TH components on the opposite side. We want to assemble the boards using our SMT and Wave lines. Now the problem is that if we solder the SMD firs
Electronics Forum | Sat Aug 13 10:56:57 EDT 2011 | jldowsey
Process Flow #4 in davef's response is your best bet for this assemblly judging buy your pictures. We purchase our selective wave solder pallets from Ascentec Engineering - they can fabricate a pallet to hold your assemblies, keep the SMT devices pro
Electronics Forum | Thu Aug 11 07:01:34 EDT 2011 | franxsmt
Thank you very much for your informative and helpful reply. I have a few more questions:) 1- So for the case 1: should I apply the glue to the PCB with the same method as I apply solder paste? (with screen printer and squeegee). If so, I would guess
Electronics Forum | Fri Aug 12 17:36:06 EDT 2011 | grics
Dave is correct. Also, you should check the TDS's of the caps and the display before processing to see if they can withstand the process temps, look for a recommended solder profile or info for the manufacturability of the device. On another note,
Electronics Forum | Thu Aug 11 15:11:35 EDT 2011 | davef
Franx: In response to your follow-up questions ... For the case 1: Q1: Should I apply the glue to the PCB with the same method as I apply solder paste? (with screen printer and squeegee). A1: Correct. Glue can be stencil printed, dispensed, or pin t
