Electronics Forum | Wed Apr 26 07:37:52 EDT 2006 | amol_kane
"Can we reuse the same machine? My point here is that the non lead free process has already coated the machine interior ( exhaust, internal flow ) with leaded component, and by conversion to lead free are we containminating the lead free product from
Electronics Forum | Wed Jul 06 18:05:57 EDT 2005 | Dave
lead free transition. want to use lead free parts w/ lead solder.. any issues I should be aware of???
Electronics Forum | Wed Jul 06 18:11:37 EDT 2005 | russ
Please search the archives as this has been discussed on many occasions. Everything should be fine except for BGAs which will require a higher temp of 235C at the peak in reflow.
Electronics Forum | Wed Sep 14 09:19:30 EDT 2011 | swag
Target those specific parts/leads with a thermal-couple and a mole and try to get the peak reflow temps up to 225 C. It's not a cure but it will improve the apperance of the solder joints.
Electronics Forum | Mon Jul 16 10:26:54 EDT 2007 | davef
Ed: We agree with you that leadfree parts can be used with leaded paste. We disagree that lead part can be used with leadfree paste. Here is link to a previous discussion here on SMTnet on the topic: http://www.smtnet.com/forums/Index.cfm?CFApp=1&M
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 | Fri Jul 20 08:09:09 EDT 2007 | chrispy1963
In passives I dont know if anything changed at all other than the terminal plating. As for Active components there has been much engineering done to allow for the extra heat needed to liquify say SAC305 or other lead free pastes without damage to th
Electronics Forum | Thu Jul 19 11:59:21 EDT 2007 | hussman
Phil is wrong. In the real world, we know that part mfgers have not changed every one of their parts to make them "high temp". They just changed the plating. Anyone who thinks otherwise, has never run a profile or touched a warm board coming out o
Electronics Forum | Mon Jul 16 10:17:22 EDT 2007 | realchunks
Yes you can use no-lead parts in a leaded process. Your solder joints will be weaker than they once were unless you change your solder paste. You can try to improve this by running a hotter reflow temp, but be careful since your flux was not design
Electronics Forum | Thu Jul 19 04:38:33 EDT 2007 | chrispy1963
I took a Lead Free troubleshooting Class at SMTA in Chicago last September taught by Phil Zarrow. He told us during that seminar that its not a good practice to cross contaminate Leaded and Lead Free components but IF it is necesary than using lead
.gif)
.gif)
