Contents
What is via stitching in PCB?
Via stitching is a technique used to tie together larger copper areas on different layers, in effect creating a strong vertical connection through the board structure, helping maintain a low impedance and short return loops.
How much current can flow through a VIA?
Vias have very low resistance and even a 0.35 mm drill via can safely carry 2 amps of current. Furthermore, their resistance can be reduced by filling them with solder.
Why do we use stitching?
But more serious cuts or incisions from surgical procedures may require stitches, or sutures, to hold tissues together while they heal. The goal is to piece together the edges so that skin and other tissues can fuse back together.
How does via stitching work on a PCB?
Via stitching on the PCB is where a large number of vias are used to connect copper areas on different layers together. Via shielding (sometimes called a picket fence) is where one or two rows of vias connect copper pour together at the perimeter of some tracks or the copper pour areas.
How is via stitching used for high current traces?
One technique used to manage high current in PCB layouts is stitching vias, which can help transfer the heat and energy of the current through the board. Here is some more information on using via stitching for high current traces in your next PCB design. High Current Concerns on Circuit Boards
Why do you need to stitch copper on a PCB?
As soon as any current starts to flow it will cause a voltage across the copper through which it is flowing, serving to both spread the current out but also cause the ground to ‘bounce’ around depending on which part of the PCB is being looked at. Via stitching can be an effective and low-effort way to more tightly couple ground across the PCB.
When do I use Vias on my PCB?
Via shielding (sometimes called a picket fence) is where one or two rows of vias connect copper pour together at the perimeter of some tracks or the copper pour areas. There are many different views on when and how to use stitching / shielding vias on your PCB, some of which we’ll summarize in this post.