Electronics Forum | Tue Apr 13 09:11:54 EDT 1999 | Dave F
| We process both tin/lead plated boards and gold plated boards in our surface mount group. I have used Sn62/Pb36/Ag2 solder paste on all gold plated boards to help prevent gold scavaging. To reduce the amount of different solder pastes we have to
Electronics Forum | Thu Apr 22 17:19:57 EDT 1999 | JohnW
| | We process both tin/lead plated boards and gold plated boards in our surface mount group. I have used Sn62/Pb36/Ag2 solder paste on all gold plated boards to help prevent gold scavaging. To reduce the amount of different solder pastes we have t
Electronics Forum | Thu Aug 24 15:37:50 EDT 2006 | Chunks
Hi Any, This is from an earlies thread "Solder Ball After Reflow Process". Date: August 16, 2006 01:52 PM Author: Russ Subject: Solder Ball After Reflow Process Oven settings are meaningless here. What does the board see? It is the paste we a
Electronics Forum | Thu May 26 13:28:12 EDT 2011 | blnorman
I agree with Dave on the processing issues, but there are others: Print speed capability (do you get good deposits at various print speeds), humidity exposure (our plant did get to the high side so moisture absorption on the board/stencil was an issu
Electronics Forum | Thu May 26 16:41:00 EDT 2011 | scottp
Here's what I do: - Test Surface Insulation Resistance (we're in the high reliability market and use a test significantly harder than IPC's). I also test SIR in combination with other assembly materials like conformal coatings and wave solder flux
Electronics Forum | Sun Apr 25 19:03:13 EDT 1999 | Steve Gregory
| Again, I know this does not answer your needs. I do believe there to be a cheaper system than ours that will satisfy your needs. Big Steve found one that seems fairly reasonable for less damandig boards than ours. | | Earl Moon Hi Joe! Yeah Earl
Electronics Forum | Tue Feb 28 13:46:28 EST 2006 | slthomas
Assuming you're using DOM and shelf life to determine what's good and what's not, you just have to know 1)the rate at which you use it up, 2) how much shelf life is left, and 3) the rate that it goes bad when not refrigerated. From that you can tel
Electronics Forum | Wed Feb 14 16:58:12 EST 2018 | cbart
you would be best to get this from your paste/solder manufacture. but here are some rules of thumb: -Solder paste out of fridge before use - get out the night before needed.. don't let your op's warm on the oven!! you will regret that! if not over ni
Electronics Forum | Thu Feb 27 02:55:53 EST 2020 | hexton
I want to avoid peoples preferences as they will differ and will not be a deciding factor. A heat gun will introduce risk to surrounding PTH components and having to add protection for those, will limit any gain in productivity. There is no question
Electronics Forum | Fri Dec 03 12:12:33 EST 2004 | mruzicka
Dreamsniper, We would need much more details about your process to help you to determine the source of voids. Type of paste, how long you leave your paste on stencil, your relative humidity, reflow profile, type of oven, oven environment (N2?) and so
