Electronics Forum | Thu Jul 14 16:08:07 EDT 2005 | russ
Stencil thickness is related to PCB design and is not related to paste type. If you release with a 8 mil stencil then use an 8 mil stencil. Of course there are pastes that release bteer than other and what not but use area and aspect ratios to dete
Electronics Forum | Tue Aug 09 10:02:07 EDT 2005 | davef
Td or Decomposition Temperature (the temperature that the epoxy actualy starts to break down) should be greater than 330*C for lead-free. Search the fine SMTnet Archives for more on Td.
Electronics Forum | Mon Aug 29 07:29:54 EDT 2005 | javi
Patrick, See your point. I migth was too focused towards how our EMS could get control of the mixed SMT process and final qualification. Rgds JaVi
Electronics Forum | Wed May 24 22:56:11 EDT 2006 | Rune
Saw that u have been doing testing with lead free.. Is it possible to have the resault of ur testing... rune@neural.com.my
Electronics Forum | Mon Oct 03 10:20:43 EDT 2005 | davef
Follow your component supplier recommendations. For instance: Xilinx says their lead-free alloy for their BGA spheres is SnAgCu, and liquidous is 217*C and they want you to peak at 230 - 235*C for good wetting according to their reflow guidelines.
Electronics Forum | Wed Oct 05 11:45:30 EDT 2005 | chunks
Not knowing your company, I would treat LF boards as a new part number. All boards are sold in lots, so controlling both part numbers at the same time would be easy. May add to your inventory but beats mixing.
Electronics Forum | Fri Oct 28 14:28:20 EDT 2005 | aespino
Have any of you used or evaluated lead free water soluble paste from kester or indium?
Electronics Forum | Tue Jun 27 11:42:54 EDT 2006 | rkevin
What is up with Indium 5.1 lately. Has Indium lost the recipe. The Lead free products from Indium used to kick ass, now they are biting mine. I'm looking at Aim 254 and Senju
Electronics Forum | Thu Nov 03 09:18:22 EST 2005 | jrr3434
How well would a 3 zone oven work? I need to do lead free and have heard that 5 zones or more will work the best. The problem is I don't have the work load to justify a large oven. Any advice? Jay
Electronics Forum | Wed Nov 09 09:41:44 EST 2005 | chunks
Wetting with lead free at wave is a bit different. You may need to increase your flux parameter to gain top side wetting. May get rid of the voids too.
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