Electronics Forum | Wed Aug 09 08:46:01 EDT 2017 | stivais
I agree. Just thinking.. could it be copper plating issue as well? anyway, would be interesting to see some photos. Sounds like solder (from HASL process, wave or even poorly washed SMT solder paste) to me.
Electronics Forum | Fri Jun 21 03:07:28 EDT 2019 | gregoryyork
REL alloys from Aim solders maybe worth looking into for this application. May I ask what your profile on reflow is like please, especially peak
Electronics Forum | Mon Jun 24 22:15:56 EDT 2019 | sssamw
Can you please tell us which components cracked? Component type, size, pitch, pin Qty, etc. The solder cracked in thermal cycling is very complicated and difficult to solve.
Electronics Forum | Wed Feb 14 04:48:58 EST 2018 | ameenullakhan
The profile I have shared is for SMQ92J leaded solder paste
Electronics Forum | Wed Aug 08 14:57:20 EDT 2018 | tey422
If you happen to have the Solder Paste Height Measurement System, it would able to do the works for you. That's only if the leads are not long.
Electronics Forum | Fri Aug 24 12:59:03 EDT 2018 | cupet
Dear davef, but this LED is skip component, that's a blank footprint and one of its pad is badly wetted...this is the reason for my thinking about contamination. Do you mean different solder paste with more aggressive flux?
Electronics Forum | Fri Dec 27 14:22:00 EST 2019 | ameenullakhan
Hi , Thanks..., Its "not wetting the pads sufficiently" We have tried with RTS , Our paste is ROL0 based chemistry. Which solder have you changed. Regards, Ameen
Electronics Forum | Fri Jan 03 02:03:58 EST 2020 | sssamw
What's your target for voiding? I cannot see it violate 25% of solder joint area. Process setting and PCB design can impact the voiding, many factors, such as PCB pad, stencil aperture and thickness, re-flow profile, solder paste, etc.
Electronics Forum | Fri Jun 12 05:56:53 EDT 2020 | sssamw
I cannot see the logic connection between HIP and RSS or RTS, or between HIP and solder paste volume because volume is ok. Did you measured the BGA solder profile?
Electronics Forum | Fri Jun 26 14:08:49 EDT 2020 | indhu
Hi, I am having a issue that SMT nut drop after reflow. The solder height all in specifications. Had tried adding flux inand the solder paste. But shows no improvement. Is the nut easily oxidize? Can anyone help me on this?
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