Electronics Forum | Mon May 06 06:22:39 EDT 2019 | SMTA-Rogers
Hello! Do you have a better stencil design to reduce the large area of solder joint voids? Or is there a suggested way to set the reflow profile? Or are there other process improvements to make the solder joint at the LED pad less than 10% per void?
Electronics Forum | Thu May 09 08:36:18 EDT 2019 | solderkingchris
Hi, You can work on improving stencil design, having the perfect profile and other process improvements but it may be the paste itself letting you down. We have put a lot of work into developing our solder pastes to significantly reduce voiding. Y
Electronics Forum | Mon May 13 23:44:26 EDT 2019 | dami0629
if use tray cannot solve the problem, you can change from the design 1）Reduce the effect of temperature on PCB 2) PCB USE HIGH TG 3) BOARD THICKNESS TOO THIN 4) MODIFY THE BOARD SIZE 5) Reduce the V-CUT depth.
Electronics Forum | Mon Jul 01 09:33:08 EDT 2019 | dbuschel
if you can't change the PCB materials or design at this point, you might be able to reduce it somewhat through the use of fixtures or edge stiffeners. Unless it is a particularly thick board, I don't think the reflow profile would be the issue. The t
Electronics Forum | Fri May 31 12:28:45 EDT 2019 | slthomas
You really need to define what you mean when you say "bend" and when you say "break". You might have zero damage to a bare board but cracked solder joints and ceramic caps on an assembly, given the same amount of bending or stress. It all depends on
Electronics Forum | Wed May 22 10:14:08 EDT 2019 | emeto
Matt, we did the study and YES perpendicular to the V-score is the worst case scenario. We did a cross section and confirmed component is cracked. If you don't have power over PCB design, the easiest way is to change board panelization or even order
Electronics Forum | Mon Jun 10 13:47:23 EDT 2019 | don_julio
First thing we did was visit the profile and we have it adjusted as far as we're willing to take it. I'm just going to make a carrier design in cad and have the board house produce some in their thickest substrate to see how it works out. Thanks.
Electronics Forum | Thu Aug 01 12:58:07 EDT 2019 | davef
Look at: * Conformal Coating 101 - https://www.smta.org/chapters/files/UpperMidwest_BTW_Conformal_Coating_June_27th_2012.pdf * IPC Conformal Coating Course - https://edge.ipc.org/course/conformal-coating * IPC-CC-830: Qualification and Performance
Electronics Forum | Mon Sep 23 05:57:55 EDT 2019 | uzbek
Hi all, we have the opportunity to buy used Essemtec FLX2011 PnP machine. The machine is made in 2009 and the last two years it wasn't used. With the machine, we would get some feeders and all nozzles. Moreover, we would get the library from the EM
Electronics Forum | Tue Oct 15 16:48:04 EDT 2019 | davef
I assume you're playing us, but I've always been a tool. So, here are a couple of links that will help you get started in understanding "printed circuit boards: + Printed circuit board [https://en.wikipedia.org/wiki/Printed_circuit_board] + Printed
