Electronics Forum | Thu Apr 15 14:36:06 EDT 2004 | Ted
I need solder that has a solidus temp. of approximately 260C so that when sent through a second reflow of 260C the solder doesn�t become liquidus. However, I need the max reflow to be less that 300C because of the substrate.
Electronics Forum | Wed Nov 23 07:24:39 EST 2005 | guenther
Well, according to Manix, this oven can run lead free, I have a few things that need to be tweeked, but I hope I can get that last zone up to temps.
Electronics Forum | Mon Dec 19 07:29:30 EST 2005 | jax
Tg is just a way to say when the board goes limp... or a quick way to rank laminates... who cares. For lead free you want to look at Td, Decomposition Temperatures. ( Temp at which the material weight changes by 5% )
Electronics Forum | Fri Feb 24 11:32:29 EST 2006 | inds
In addition to the response from Board House... You WILL see delamination at lead-free temp even during reflow.. more often than not.... sometime manufacturer's try to get aways with it by pre-baking the board to remove moisture..but I think one has
Electronics Forum | Thu Mar 02 09:35:05 EST 2006 | patrickbruneel
85% are exempt from the RoHS directive. Doesn't make a lot of sense but that wasn't your question.
Electronics Forum | Thu Mar 02 16:33:53 EST 2006 | russ
Your best bet would be to browse through you current solder suppliers catalog and pick your alloy. Most of them have a list of alloys and their melting points as well as what form they can be supplied in.
Electronics Forum | Fri Mar 10 03:16:07 EST 2006 | Slaine
Multicore make a HMP alloy liquidus at 298 degrees, Pb93Sn5Ag2.Ive used it to attatch thermocouples but they're difficult to solder as they dont wet.
Electronics Forum | Mon Mar 13 10:56:37 EST 2006 | Bob R.
I would try swapping the hottest & coolest thermocouples where they go into the mole and see if temp readings follows the thermocouples or stays with the mole input. A 40 deg delta T on a board that small really sounds like a measurement issue.
Electronics Forum | Wed Apr 26 13:30:35 EDT 2006 | pfifla1
i have a working 4zone novastar 1800 i can sell for $5500. wont get hot enough for lead free but will get you through till you get around to buy a high temp oven.
Electronics Forum | Wed Aug 09 18:24:30 EDT 2006 | SWAG
Great advice, all. Thanks much. I called on the Tribol 930 and there is now a blend called Tribol 1421 that is good for higher temps. Speedline recommends in place of 930 if you wish to do so. Might be something to consider for lead free stuff.
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