Contents
- 1 What should you do if after soldering the components you have noticed that the circuit is not working?
- 2 How do you remove solder without a vacuum?
- 3 How does solder mask affect distance between pad and via?
- 4 What does tenting vias, plugged vias and vias mean?
- 5 Is there a trick to drilling through vias?
What should you do if after soldering the components you have noticed that the circuit is not working?
If the solder refuses to flow the way you want it to:
- Stop and let the joint cool.
- Clean and tin your iron.
- Clean off any burnt flux from the joint.
- Let the iron come back up to temperature.
- Then reheat the joint and try again.
How do you remove solder without a vacuum?
Place your wick against the point where you want to remove solder, then hold your irons tip over that point. You’ll see the solder soak into the wires around the point where your iron is touching once it gets hot enough to melt.
What is encroachment?
Via encroaching: a technique that is often adopted due to concerns about the presence. of solder mask material under the device. This technique allows solder to flow down the via, but restricts the migration of the solder across the bottom plane of the board.
How does solder mask affect distance between pad and via?
The presence of the solder mask effectively increases the distance between the via and the nearby solderable pad, reducing the likelihood of solder bridging from the pad to the via. Since the hole is open, there is no concern about contaminant entrapment or air pocket formation in the barrel of the hole.
What does tenting vias, plugged vias and vias mean?
It’s the most popular and mature process in PCB fabrication, and tenting vias mean to cover the annular ring and via hole with solder mask, which is mainly in covering the annular ring to prevent exposure to the elements and reduce accidental shorting or contact with the the circuit.
What happens if you break the solder on a circuit board?
If you do it fast enough, you end up with the solder frozen on the wire sticking out the other side of the board, and you can break the solder off and then just pull the wire back through.
Is there a trick to drilling through vias?
There is no trick to drilling through vias, provided you follow your fabricator’s rules for minimum diameter, maximum aspect ratio (board thickness divided by hole diameter), and adjacency (minimum allowable distance from the edge of one via to the nearest adjacent via). Next come mechanically drilled blind vias.