Author Topic: SMD work  (Read 1481 times)

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Offline akis

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SMD work
« on: October 07, 2014, 09:20:42 am »
I have watched a few youtube tutorials on how to work/solder SMD components.

Do I understand it correctly that the PCB must have a solder mask otherwise the solder paste will bridge ? On the youtube tutorials they use professionally made PCBs but for home made ones, I do not have solder mask equipment.
 

Offline Kjelt

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Re: SMD work
« Reply #1 on: October 07, 2014, 10:35:29 am »
This might be an issue on components with small distances between the legs <0.8mm so or you can use a lot of flux and hope for the best or as I sometimes do with rework, is solder each leg seperately with a small smd solder pencil and a tiny amount of solderpaste (not solderwire but paste) that you have put on with a syringe with needle and  solder paste dispenser.
EDIT: I assumed you manually soldered, for reflowing the amount of paste is crucial, too much paste and small pitch even the pro pcb's won't stop bridging.
« Last Edit: October 07, 2014, 10:41:10 am by Kjelt »
 

Offline sleemanj

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Re: SMD work
« Reply #2 on: October 07, 2014, 10:38:39 am »
Do I understand it correctly that the PCB must have a solder mask otherwise the solder paste will bridge ?

Only if you were using really tight pitchpackages, or were sloppy with the paste I expect.

I don't reflow, but don't have problems with drag-ish soldering SOIC etc on home etched boards without mask, easy as pie.

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