Electronics Forum | Mon Nov 08 11:00:53 EST 2004 | davef
It's possible your supplier has not thought through the results of their conversion to lead-free throughly. We'd expect something like: Reflow Parameters||Pb Assy||Pb Free Peak Temp.||235�C �5�C||255�C �5�C Time Within 5�C Peak Temp.||20 to 40 sec.|
Electronics Forum | Mon Oct 18 12:55:47 EDT 2004 | marc
45 seconds from 230-245C. Check your paste material of choice for recomended profile peak temp and TAL. If you have not selected a lead free material check out the major paste suppliers on their lead free material offering and review the specs.
Electronics Forum | Mon Oct 18 12:02:06 EDT 2004 | Rob
Hi Guy's, Sorry about this, but yes it's another lead free related question. We are looking at using a Chinese SMD DC-DC Converter in a new design, whilst keeping one eye on the approaching Lead-free issue. The manufacturer claims that these are O
Electronics Forum | Thu Oct 28 05:49:41 EDT 2004 | Rob
Any comments to add Dave?
Electronics Forum | Thu Nov 04 12:41:37 EST 2004 | cobar
Definetely 245�C
Electronics Forum | Wed Oct 20 07:55:02 EDT 2004 | Rob
Gentlemen, Thanks for your feedback - I think we are going to have to stay with the parts we are using. Cheers, Rob.
Electronics Forum | Fri Nov 05 05:06:18 EST 2004 | rlackey
Thanks Mark, we're not going to go anywhere with that particular supplier now. Cheers, Rob.
Electronics Forum | Mon Nov 08 12:50:04 EST 2004 | Rob
Thanks Dave, I'm guessing they either were just hoping they'd be ok, or were suppling them to people using nitrogen. Cheers, Rob.
Electronics Forum | Mon Oct 18 22:15:11 EDT 2004 | KEN
I have two industry leading customers that have specific requirements for components to survive 30 seconds above 230C. In one case I have a custom ASIC that is heat sinked on the die (to the PCB). The sink pulls heat out of the lead frame very effi
Electronics Forum | Thu Jan 29 00:12:39 EST 2009 | grayman
Hi Armando, I think you have to buy a bigger reflow let say 7 zones to get the correct profile. The reason you are getting that problem is due to short profile time. What is the size of your board? What is the composition of your solder paste? Ple
