Electronics Forum | Thu Nov 30 17:31:41 EST 2000 | Larry C.Dyck
i am looking for info on lead free solder screen printing
Electronics Forum | Thu Nov 30 20:41:35 EST 2000 | Roland
Larry, SMTnet.com did an Onboard Forum regarding lead free solder. The link : http://www.smtnet.com/onboard/get_forum.cfm?session_id=4& Also, I did a search of the SMTnet forum (left side of most pages-please be patient it takes a moment) using th
Electronics Forum | Thu Nov 30 22:47:54 EST 2000 | CAL
Contact Lee Whiteman @ ACI/empf. Lee is an industry expert in Leadfree soldering. He has also ran an IPC leadfree work shop involving a DOE on Leadfree Screen Printing. Lee can be reached at lwhiteman@aci-corp.org or 610-362-1200. Best regards, Cal
Electronics Forum | Thu Feb 16 12:41:50 EST 2006 | fredericksr
Hey folks, I was interested in any information that you might have on tombstone reduction when using a lead free solder and profile. Thanks for any input that you may have! -Russ #x
Electronics Forum | Wed Nov 02 11:25:46 EST 2005 | dougm
I should specify that I am using SAC 305 as well.
Electronics Forum | Fri Feb 17 11:01:47 EST 2006 | amol_kane
with lead-free solders, one would expect to find less instances of tombstoning. this is because SAC alloys are not eutectic and melt over a range of temp (usually 217-220 deg C) instead of at a single temperature. therefore the forces due to solder s
Electronics Forum | Tue Dec 12 01:52:05 EST 2006 | hemu_me
As we have vitronics oven(SMR610A) made in dec,1997,which has 5 heating zones and 2 cooling zones. For Lead free soldering what should be our baseline for low/medium boards.we have gathered profiles from various paste manufacturers,however we don't k
Electronics Forum | Wed Nov 02 12:08:40 EST 2005 | chunks
It could be lack of preheat or flux. You can verify the flux by hand applying. I'll bet it's lack of preheat though. That's usually the case with selective solder.
Electronics Forum | Thu Nov 03 09:43:55 EST 2005 | lupo
Check flux penetration and type of flux. How much is solid contents. The solder filling is better under Nitrogen. Check the time (speed) of the nozzle whether is correct. Usually For SAC305 the temperature of bath is 320C/degrees, but only for sel
Electronics Forum | Fri Aug 12 13:17:00 EDT 2005 | patrickbruneel
To all smt neters, In many different threads I have tried to bring awareness of the dangers lead free alloys pose to the reliability of solder connections. Many times those warnings have been waved by unscientific reports (from lead free solder manu
