Electronics Forum: soldering and temperature and precision (Page 1 of 11)

Expected pick and place precision for 0603 LEDs?

Electronics Forum | Wed Nov 13 16:48:19 EST 2013 | spoiltforchoice

I would expect any half decent machine to place 0603 parts slap bang on target to the typical defined accuracy for such parts on most machines of perhaps ~60 microns or better. Self correction during reflow is IMHO much less pronounced with lead-free

Pre-bake times and temperature for polyimide boards

Electronics Forum | Wed Jan 12 10:05:20 EST 2005 | Dreamsniper

we are using polyimide boards 6 inches x 7 inches, 2.5mm thick, 12 to 14 layers, for aerospace industries. I am using a long bake of 12 hours at 70'C prior to manufacturing or exposure to elevated reflow and wave soldering temperature. If schedule i

How does temperature and humidity effect solder paste/printing

Electronics Forum | Wed Apr 11 19:32:39 EDT 2001 | Adam

I'm trying to find information/articles describing the effects of temp and humidity on solder paste. Just recently we have gone through a change outside temperature and humdidty and have notice solderabilty problems with smt boards.

How does temperature and humidity effect solder paste/printing

Electronics Forum | Wed Apr 11 22:05:58 EDT 2001 | davef

OA pastes are more hydroscopic than NC pastes. Hydroscopic. The capacity of a material to absorb and retain moisture from the ambient air. Sometimes this is compounded if you remove paste from the frig and let it warm to room temperature, because

wave soldering and solder bridge

Electronics Forum | Mon Dec 17 12:06:58 EST 2007 | pjc

5 Steps to Eliminate Bridges: 1. Establish (wave) Parallelism First and foremost, you must establish board-to-wave parallelism. This is the prerequisite to any wave solder process control. For an understanding of the power of this approach go to ht

Selective soldering pallets and solder balls

Electronics Forum | Mon Dec 02 17:02:28 EST 2002 | Vince Whipple

Steve, I agree with the recommendation to check the temperature. This is the first place to go. Is this an IPA or water based Noclean? What is the topside temp of the assembly at the effected areas? If you are too cold you will have a tendency to hav

Reflow soldering problems and traces under component

Electronics Forum | Mon Jul 18 12:24:53 EDT 2016 | oleksz

Some people involved in PCB assembly process claim that SMD components reflow soldering problems are often caused by traces running under a component. According to this claim, trace (or any copper) covered by solder mask and placed under SMD componen

Reflow soldering problems and traces under component

Electronics Forum | Mon Jul 18 12:25:30 EDT 2016 | oleksz

Some people involved in PCB assembly process claim that SMD components reflow soldering problems are often caused by traces running under a component. According to this claim, trace (or any copper) covered by solder mask and placed under SMD componen

Selective soldering pallets and solder balls

Electronics Forum | Thu Dec 05 11:36:30 EST 2002 | William Guatemala

Have you check the flux gravity lately? If not, Check the flux gravity every 6 hours to make sure proper parameters are meet. Here is a list of things that may cause your solder ball problems; Excecive heat, defective fixtures, preheating temperature

Selective soldering pallets and solder balls

Electronics Forum | Tue Dec 10 14:10:38 EST 2002 | Randy Villeneuve

Steve, I wave solder most if not all our boards with selective wave pallets. I did not catch if the solder balls were on top of the board or on the bottom but that will make a difference on what to do to get rid of them. Pallets are good and bad. On

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