Electronics Forum | Thu Jan 18 12:53:19 EST 2007 | Heywood Jablowme
What is your setting on screen mask printer, stering solder paste, profile reflow etc?
Electronics Forum | Thu Jan 18 12:07:52 EST 2007 | tonang
How to problem solved about production reject IC short? Please advice us about setting screen mask printer, stering solder paste, profile reflow etc Thank you for your attention and cooperation Best regard, Tonang
Electronics Forum | Fri Jan 19 14:32:35 EST 2007 | Mike Hunt
What pitch IC? Perhaps a nickel stencil will work. Are your board FR4? Warping the board could play a major factor in solder shorting.
Electronics Forum | Fri Jan 19 14:29:19 EST 2007 | I.P. Freely
What is the part designator? A lot has to do with that. Also, is this a double sided reflow board. Perhaps you need to change your process to accept two heat cycles simultaneously. Solder thieves should work. Check the archives.
Electronics Forum | Wed Jul 10 16:34:23 EDT 2013 | hegemon
Preheating is critical in Vapor Phase Soldering. One trick that is done is to use the "soft vapor" area just above the soldering vapor, some machines can pause just before going into the soldering vapor. Using that pause above the vapor to continue
Electronics Forum | Thu Dec 22 12:05:37 EST 2005 | Tony
Currently we are using a 2 step vapor soldering process to manufacture our std. lead soldered parts. The first step was done with a ls240 vapor fluid and the second was done with a ls200 fluid. Using a 221 deg C sn95/Ag5 solder for the first step a
Electronics Forum | Thu Dec 22 15:36:03 EST 2005 | CC
In general two step temperature reflow process requires minimum 40 deg C delta to be sucessful. We are not using vapor phase soldering but we have similar situation when we change to SAC lead free solder for PCB component population and secondary swe
Electronics Forum | Mon Aug 12 15:56:13 EDT 2013 | pjchonis
Vapor phase soldering systems by Asscon are characterized by special designed heating modules. The thermal mass of the heating modules is designed so that a completely delay-less and direct regulation of the heat/flow/energy transfer to the soldering
Electronics Forum | Fri Nov 19 05:12:21 EST 1999 | Graham Naisbitt
Steve, If you can get me your snail-mail address, I will send you some latest information. We actually have a totally new system called Delta 5. It is Condensation Soldering rather than Vapour phase, the difference being that we solder in an air ti
Electronics Forum | Wed Jul 10 14:29:27 EDT 2013 | isd_jwendell
You wouldn't have a very good profile if you went straight from room temp to vapor temp (_-). The chamber should preheat the board before using vapor to melt the solder.
