Electronics Forum | Thu Apr 22 16:07:36 EDT 1999 | Rick
| | Do solders exist that are both lead-free and low-temperature (e.g. 100-170 Celsius range)? If so, who supplies these materials? Any websites or contact information would be most helpful. | | | | Also, I am not an expert on soldering, so any
Electronics Forum | Fri Dec 07 15:23:27 EST 2001 | davef
I'm with Brian. TIN COATED 0603 FAILURES Welcome to the lead-free generation. ;-) The Eurolanders are so blanking stupid, it just makes my head hurt. But then again, it doesn�t take much. OK, enough pontification. Your profile is setup incorrec
Electronics Forum | Thu Nov 21 06:36:30 EST 2002 | Ben
I'm doing SMT of lead-free solder BGA on FR4 Ni-Au PCB. The solder paste I'm using is Sn/Ag/Cu and reflow with peak temp at 240C. I found there are voids(1-2) in almost every solder joint(500 micron in dia) under xray. And the void size is violate th
Electronics Forum | Mon Sep 11 08:52:12 EDT 2006 | Amol Kane
lead-free processes involve higher temperatures. if you run this PCB thru the reflow oven, the worst possible scenario is that the board may melt and deform. even if it doesnt, it may delam internally (and or the bare board reliability might be compr
Electronics Forum | Sun Jun 22 13:24:49 EDT 2014 | davef
I don't know. We never had craziness like this before lead-free. You should have the yellowish-metal analyzed to be sure. Guessing: You're seeing this color on the terminations of components, not on the bulk of the SnX solder connection. If that's
Electronics Forum | Fri Jul 06 12:07:07 EDT 2001 | nwyatt
I have been researching lead-free paste for a while now and I will share with you what I can. Firstly, SnAgCu seems to be the common industry choice. It really depends on your application - the cell phone/pda sector is primarly using different comb
Electronics Forum | Thu Dec 17 10:04:28 EST 1998 | Chrys
Necessity is the mother of invention... The other day I loaned my last bit of high-temp solder to a co-op and never saw it again. Then I had to run a profile and I was in a pickle with no solder. So I ran out to the local Radio Shack to see if the
Electronics Forum | Tue May 07 05:55:58 EDT 2002 | ianchan
Hi mate, do you mean : 1) Au = "ENIG" or "immersion Au(gold)"? or 2) Ag as in = "silver"? If Au is the correct term, no need to make extreme changes in your profile. just keep the profile to within your paste specs of preheat, reflow time and reflo
Electronics Forum | Thu Dec 17 10:22:31 EST 1998 | Earl Moon
| Necessity is the mother of invention... | | The other day I loaned my last bit of high-temp solder to a co-op and never saw it again. Then I had to run a profile and I was in a pickle with no solder. | | So I ran out to the local Radio Shack to
Electronics Forum | Thu May 05 03:22:38 EDT 2005 | Hannu
I do not mean big, heavy transformers but rather small ferrite core transformers, with ferrites in the range of EF16 .. EF40. The weight of the lead and its percentage of the total weight is not the issue here. We simply do not want lead-containing t
