RF fences

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I am having trouble with achieving wetting on fences and I c... - Aug 07, 2019 by QA123

We do this often. Including fences with many internal struct... - Aug 08, 2019 by SMTA-Joe SMTA

I am placing these at SMT.... they are going through reflow ... - Aug 08, 2019 by QA123

Ok, interesting. Unfortunately I can't speak on that. We alw... - Aug 08, 2019 by SMTA-Joe SMTA

Thanks for the feedback I will pull a group together and dis... - Aug 08, 2019 by QA123

QA123

#83216

RF fences | 7 August, 2019

I am having trouble with achieving wetting on fences and I cannot find an IPC callout. What experience does the group have with fences install and inspection?

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SMTA-Joe

#83220

RF fences | 8 August, 2019

We do this often. Including fences with many internal structures.

I assume you are hand soldering the fences. Are you heating the assembly during the soldering process?

We typically have no issues with this operation, on a variety of assembly types, such as standard PCBs, to PCBs soldered into large housings with high thermal mass. We find that setting a hotplate from 80-100 C provides the best results. If the assembly won't sit flat, consider an IR heater. But the key is getting heat into the assembly however you can.

This message was posted via the Electronics Forum @ SMTA SMTA

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QA123

#83221

RF fences | 8 August, 2019

I am placing these at SMT.... they are going through reflow so they should be reaching a high temperature.....

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SMTA-Joe

#83223

RF fences | 8 August, 2019

Ok, interesting. Unfortunately I can't speak on that. We always treat these as a 2nd ops and have never had a problem. We determined it was something that could add to thermal trouble. Also, the amount of solder added during paste deposition may not be enough to complete the seal nicely.

This message was posted via the Electronics Forum @ SMTA SMTA

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QA123

#83224

RF fences | 8 August, 2019

Thanks for the feedback I will pull a group together and discuss

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