Electronics Forum | Thu Jun 04 14:35:11 EDT 2009 | floydf
We wound up using a ramp to spike profile with 50 sec. between 150C and 217C and 90 sec. above 217C. The idea being the flux is still active when it hits reflow, and it stays in reflow long enough for the weird alloy in the parts lead to wet. All par
Electronics Forum | Wed Jun 27 10:44:09 EDT 2007 | bjrap3
What would a good ramp rate be. I am running from 205-217C in 17 seconds. My reflow is 217-235 for 68 seconds. The bottom preheaters are set at 200C and the nozzle is 2075 & 295 for each process respectively.
Electronics Forum | Fri Feb 01 10:57:52 EST 2002 | davef
Yes, that's what people are thinking. The 217�C melting temperature that you mention requires a ~250�C reflow temperature. Generally, boards, legend ink, and components cannot take that temperature. Further, few ovens can produce that temperature
Electronics Forum | Wed Oct 02 15:20:55 EDT 2002 | Eric
Is there a steadfast rule of thumb for a good solder joint on an Enig Gold board. I come across this number 217C when discussing BGA profiles. Is this a published number? I sure could use a reference. Anybody feedback is appreciated.
Electronics Forum | Sun Jun 13 18:44:54 EDT 2004 | Ken
If the balls are SAC then you may actually reflow them at 217C. Of course, I may be assuming they are SAC...
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 | Tue May 02 07:56:58 EDT 2006 | billyd
Yeah, that's what I'm doing now. I have it now peaking around 235, with about 70 sec. above 220C. (220C is the reflow temp, according to manufacturer. I've always used 217C for Pb free) Wish me luck. Thanks!
Electronics Forum | Thu Oct 05 16:06:33 EDT 2006 | cw
Thanks! What's your ramp rate?2 - 3C/sec? What's your time above 217C. What's your peak temp?
Electronics Forum | Mon Apr 07 13:12:02 EDT 2014 | cyber_wolf
Gary, We are missing something here. I see no evidence of reflow at all. If you have a thermo couple under the inductor, 237 deg with a TAL of 48 seconds should work all day long.(even though it may be on lower end of process window) SAC melts at 21
Electronics Forum | Mon Oct 10 20:06:59 EDT 2005 | nuezmaster
Does anyone have any experience running Aluminum Electrolytic Caps with a SAC305 alloy. The profile for the solder calls out a peak temp of 235-255C and 60-75 seconds above 217C. Most can cap manufacturers are calling out for 230-245c max for no lo
