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| Tips on hand-soldering USB type C receptacles? |
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| SiliconWizard:
Currently designing a new isolated JTAG/SWD probe, and I'm going to use an USB type C connector for a change. I selected the Amphenol 10137061-00021LF which seems a good compromise (pricing, build quality, availability and one through-hole row). I need to be able to hand-build a few prototypes. This connector has a shielding which will prevent (I think) direct hand-soldering of the SMD pins (one of the two rows) which are covered by it. Most receptacles I've found so far have a similar design (I guess for EMI reasons?). I've found only one receptacle the shielding of which doesn't cover the row of SMD pins, but it's unvailable. Don't want to get into supply issues. Obviously, using a hot air ironl ooks like an option but I'm wondering how difficult it will be given that the whole connector is covered by its shielding, so heating it from above will be a pain due to the thermal mass. Any tip/real experience with hand soldering those connectors is welcome. |
| wraper:
You would need metal stencil (preferably 0.10-0.12mm thick) to apply solder paste and use hot air. Preheater is not necessarily required but will make things much easier. Just applying solder paste on the pads without separation will guarantee shorts between the pins. Soldering iron is completely useless for SMT pins. |
| wraper:
If you don't want to bother with stencil, you could also apply as much solder as you can get on SMT pads, clean flux residues, apply tacky flux on them, place connector and heat with hot air. |
| SiliconWizard:
--- Quote from: wraper on December 06, 2018, 05:30:16 pm ---If you don't want to bother with stencil, you could also apply as much solder as you can get on SMT pads, clean flux residues, apply tacky flux on them, place connector and heat with hot air. --- End quote --- Thanks, but didn't you say above that without separation shorts are almost guaranteed? (And I would tend to think so as well, unless maybe you find just the right amount of paste...) |
| wraper:
--- Quote from: SiliconWizard on December 06, 2018, 05:38:59 pm --- --- Quote from: wraper on December 06, 2018, 05:30:16 pm ---If you don't want to bother with stencil, you could also apply as much solder as you can get on SMT pads, clean flux residues, apply tacky flux on them, place connector and heat with hot air. --- End quote --- Thanks, but didn't you say above that without separation shorts are almost guaranteed? (And I would tend to think so as well, unless maybe you find just the right amount of paste...) --- End quote --- You should apply as much solder as you can but pads should not be shorted of course. I thought it was obvious. If you do this, you should notice that solder prefers to stay on the solder iron tip rather than on small pads. |
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