Electronics Forum: solder and paste and temperature (Page 1 of 38)

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

paste Sn42/Bi58 and Lead Finish

Electronics Forum | Thu Nov 15 09:29:29 EST 2012 | anvil1021

Maybe this piece of information will help. In China (just returned from visit) there are many factories that are using a dual temperature process using SAC305 or Sn100C and 42/58. Apparently this allows them to run their through hole parts through re

paste Sn42/Bi58 and Lead Finish

Electronics Forum | Tue Nov 06 22:37:35 EST 2012 | davef

Ryan ... "As for bismuth-based lead-free alloys, a lower melting temperature than that of tin-lead is offered together with a cost similar to that of tin [in the area of $3/lb]. Unfortunately, bismuth in soldering alloys tends to create embrittlemen

paste Sn42/Bi58 and Lead Finish

Electronics Forum | Sat Nov 03 11:08:24 EDT 2012 | anvil1021

We have experience with this alloy, but with enig and we did start with PB HASL, none of our PCBs would of course pass thermal cycling at normal temperatures with the HASL so we went to ENIG. we could thermal cycle at 100-115C with no issues. We foun

paste Sn42/Bi58 and Lead Finish

Electronics Forum | Fri Nov 02 14:46:18 EDT 2012 | ericrr

So how does this (lead free paste Sn42/Bi58) solder compare with the Sn-Ag-Cu (Tin-Silver-Copper) combination which does not flow as well (in the oven), needs higher oven temperature, (that can be adjusted by reducing the oven chain speed) and cost m

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

Pb free BGA and Sn Pb solder paste

Electronics Forum | Tue Jun 01 17:37:34 EDT 2004 | lynnmc

Any view on what the minimum reflow temperature is for a SAC ball bga to form a reliable joint with PbSn solder?

Evalution on solder paste and spray flux

Electronics Forum | Wed Jan 26 20:52:06 EST 2005 | Chua

Hi, I'm going to evalute new solder paste and flux for wave-solder. Appreciate you could advise what are the things need to look out during the evalution. Any recommend step or proper way of doing solder paste and flux evalution. Appreciate your he

solder paste ingredients and their effects

Electronics Forum | Fri Feb 09 02:30:50 EST 2007 | Muhammad Haris

What are Resins, Solvents, Activators, and Thickening Agents in Solder Paste and what are their helpful and harmful effects? AND What are the purposes/properties and effects of Sn(Tin), Pb(Lead), Ag(Silver), Bi(Bismuth), In(Indium), Cu(Copper), Ni(

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