Electronics Forum | Fri Jan 04 07:44:37 EST 2019 | bane016
Try to measure the profile again by datasheet..with the result that you will reduce the temperature in the areas below...increase the upper temperatures as needed according to the properly measured profile...I hope you can solve the problem like this
Electronics Forum | Fri Jan 04 08:02:03 EST 2019 | ameenullakhan
Hi, Thanks for the valuable feedback. We are at lower spec : ( TAL )Reflow time : Around 50 Sec ( Above 217 deg C) Peak Temp : 240- 245 deg C. Any other suspects. And your English is fine :) Regards, Ameen
Electronics Forum | Fri Jan 18 12:05:47 EST 2019 | SMTA-Timothy
It's unlikely to be a reliability issue. It looks like tin oxide. Nothing to be too concerned about. Otherwise your process controls sound robust.
Electronics Forum | Sat Jan 19 11:53:51 EST 2019 | davef
cColor is NOT a measure of solder connection quality. It is a process indicator. So, you're being smart by trying to figure out whats causing he discoloration
Electronics Forum | Sat Jan 19 12:00:13 EST 2019 | ameenullakhan
Thanks Dave, For the feedback. It was initially rejected by our customer end. so we had to submit complete analysis report with lab test of the PCBA.
Electronics Forum | Sat Jan 19 15:20:25 EST 2019 | ameenullakhan
Hi, Thanks . It was ok with N2 environment. Reducing below recommended temperature of the supplier. It was not ok for us.. We had BGA components. Which were getting affected if we reduce temperature below recommendation. Regards, Ameen
Electronics Forum | Mon Jan 21 12:05:44 EST 2019 | ameenullakhan
Hi Tony, Thanks for the valuable feedback. We got to know about the flux they use ( they were using organic water soluble flux) . Alloy we didn't enquire. Will try to do that. thanks., Regards, Ameen
Electronics Forum | Mon Jan 07 15:19:13 EST 2019 | med_cezir
Hi everyone. I wanna learn how I can edit pre generated pick and place program(x.pp file) for AX501.
Electronics Forum | Tue Jan 08 16:43:04 EST 2019 | bane016
Try with "120F" type part number:48503503 or 1220 1240...reduce pick up speed...
Electronics Forum | Thu Jan 24 09:50:59 EST 2019 | my3sons
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