Electronics Forum | Sat Nov 03 11:08:24 EDT 2012 | anvil1021
We have experience with this alloy, but with enig and we did start with PB HASL, none of our PCBs would of course pass thermal cycling at normal temperatures with the HASL so we went to ENIG. we could thermal cycle at 100-115C with no issues. We foun
Electronics Forum | Sat Nov 03 11:20:35 EDT 2012 | davef
EricR: There's substantial information about the properties of solder alloys on the web. Here's an example of something that I clipped from one site Alloy ||Solidus (°C)||Liquidus (C°) ||Tensile Strength (psi / MPa) Sn42 Bi58||-E-||138||8000 / 55.2
Electronics Forum | Sat Nov 03 10:57:27 EDT 2012 | davef
EricR: Regarding "*** By the way, since we have used the Tin-Silver-Copper lead free solder there has been a strange liquid type chemical leek from the oven exhausted pipes." ... I don't know anything about your process, but the first thing I'd inve
Electronics Forum | Tue Feb 29 10:14:02 EST 2000 | Robert Hartmann
My company is just getting into the flip chip packaging arena. We are putting in a prototype/small volume wire bond PBGA line. We have some questions with regard to choosing solder balls and cleaning of flux. 1) Is there a formula for the shrink
Electronics Forum | Tue Feb 29 10:14:02 EST 2000 | Robert Hartmann
My company is just getting into the flip chip packaging arena. We are putting in a prototype/small volume wire bond PBGA line. We have some questions with regard to choosing solder balls and cleaning of flux. 1) Is there a formula for the shrink
Electronics Forum | Thu Sep 23 08:08:12 EDT 2021 | SN
Hi. Anyone in this forum experienced the lead-free solder paste SAC305 and SAC405? What are the differences to expect for solder paste with SAC305 and SAC405? What is the effect of silver (Ag) alloy in solder paste? It was really appreciated if could
Electronics Forum | Fri Oct 01 01:25:55 EDT 2021 | sn
Thank you Djo for your sharing. By the way, do you know that which field/product will prefer to use SAC405 paste instead of SAC305 or lower Ag wt% alloy solder paste?
Electronics Forum | Thu Oct 02 17:00:44 EDT 2008 | davef
Is that accurate? If so, what are your aspect & area ratios? [Similar to the JerryS comment above.] * You say, � � and the average height is very high: nearly 200 pct.� => Our troop can make paste that height too. They snap the stencil-off a fast as
Electronics Forum | Thu May 06 06:47:12 EDT 2004 | praveen
Hi, I just need to undestand any issue? If I mount Pb free BGA and use normal SN/Pb solder paste?
Electronics Forum | Tue Jun 01 19:23:15 EDT 2004 | Ken
profile it for the tin/lead paste. The tin in the solder paste will begin to disolve the sac ball. This is exactly the same scenario as 90/10 (80/20)high temp balls found on ceramic bga and many super bga devices (except the sac balls are now tin r
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