Electronics Forum | Mon Apr 25 21:52:58 EDT 2005 | KEN
I wonder if yor customer means wrong "flux"? Your not solderng to gold. Your soldering to Nickle. The gold is disolved and dispersed. Your joint strength comes from the SnNi intermetalic.
Electronics Forum | Tue Sep 13 04:31:39 EDT 2005 | milroyperera
Hi, I`m using Sn633-2T-E solder paste that is specially formulated for fine pitch where 12mil pitch is applicable.I have the data sheet of this paste but the squeegee speed is not defined. What is the expected speed for solder paste printing process?
Electronics Forum | Tue Sep 13 09:08:15 EDT 2005 | russ
Squeege speeds can vary from .5 in/min to 6-8 in/min. It really depends on what the prints look like. For ultra fine pitch I usually start at .8 in/min and take it from there.
Electronics Forum | Tue Sep 13 14:39:07 EDT 2005 | russ
Minutes, seconds, something like that! It is seconds, sorry. I hope Milroy doesn't have any issues with process speed (12-20 min. print time per my way)
Electronics Forum | Wed Oct 05 11:45:30 EDT 2005 | chunks
Not knowing your company, I would treat LF boards as a new part number. All boards are sold in lots, so controlling both part numbers at the same time would be easy. May add to your inventory but beats mixing.
Electronics Forum | Wed Oct 05 11:49:22 EDT 2005 | russ
We have the pb free symbology embedded in copper on the fabs.
Electronics Forum | Fri Oct 07 04:15:09 EDT 2005 | GS
do not forget,ROHS Directive does not allow other chemical substances (ie. PBB, PBDE,....) that could be in PCBs, so the PCB must be ROHS compliant and not only Pb Free. That means be carefully when marking PCB or PBAs. Regards..........GS
Electronics Forum | Sun Nov 06 20:52:34 EST 2005 | milroyperera
Hi Ken What exactly the best reffered angle for Sn/Pb & Pb-free soldering? Is there a site where I can read the basic engineering concepts about this topic?
Electronics Forum | Thu Jan 05 17:10:04 EST 2006 | russ
The CCGA packages that we install are still a tin/lead alloy and not a SAC alloy. They were 90/10 SN/PB. I beleive that this may be one reason why the difference.
Electronics Forum | Thu Dec 01 11:46:41 EST 2005 | pjc
FYI: Most Sn/Pb and Pb Free solderpastes today are designed to run both a ramp-soak-spike or ramp-spike profiles.
