Electronics Forum | Wed Dec 04 09:46:15 EST 2002 | stefwitt
In a new design project, I would like to attach electronic components to a board using either sonic or resistance spot welding. Anyone out there, who could provide me with actual parameters, like frequency, current and equipment used?
Electronics Forum | Tue Apr 27 19:13:04 EDT 2021 | astarotf
Solder balls, can be excess paste by opening ST. Do you see the curve still working pasty with lead with alloy "63Sn / 37Pb alloy" has defects?
Electronics Forum | Fri Apr 16 17:20:34 EDT 2021 | astarotf
We are currently producing a project that brings a TQFP64. But some boards do not solder the component well with its ideal fillet, some are well soldered when they come out of the reflow oven, but some are not. Can the pins be sulphated? How can we c
Electronics Forum | Fri Apr 16 17:44:12 EDT 2021 | dwl
I'm concerned by the solder spheres in the via on the first picture. Are these boards mis prints that got washed and printed again? To me it almost looks like someone washed the board, but left a lot of solder paste on it. The lack of flux prevents
Electronics Forum | Tue Apr 20 12:28:46 EDT 2021 | kylehunter
I agree with DWL's comments. Also, your profile is really really inconsistent. How did you attach the probes to the board? You have a 25c delta in your peak temps. Unless that is from a probe lifting, that is really bad. What type of oven are you usi
Electronics Forum | Tue Oct 29 03:29:23 EDT 2019 | ramesh_10377
hi with reference to below thread Nickel pad for spot welding on PCB i have a similar requirement. Plese help me to resolve. regards Ramesh.S
Electronics Forum | Sat Oct 01 15:51:54 EDT 2016 | mnikhilesh
I have seen a small nickel pad (probably) soldered on PCB which is used to spot weld the other nickel strip coming from battery. I have seen them in chinese protection boards. I need to know how and where I can find them? Is there any technical name
Electronics Forum | Mon Oct 03 05:10:19 EDT 2016 | robl
Hi Nikhilesh, It was a long time ago, but we used to buy the nickel in reels then had a cut and feed station on the smt machine with selectable sizes. We did many types of boards in very large volumes, and usually the Nickel strip was soldered to t
Electronics Forum | Tue Feb 11 09:26:57 EST 2020 | astarotf
Hi everyone I have problems welding QFN components in a 10-zone reflux oven, we cannot make a welding fillet that covers the entire QFN pin. Currently we use paste T4 - 63Sn / 37Pb. I enclose the curve of the oven profile. Any help or support on this
Electronics Forum | Tue Feb 11 15:17:49 EST 2020 | emeto
Your profile should be close to this.
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