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SMD CIRCUIT DESIGN SOFTWARE HOW TO

Power routing: Vias are also used to connect components to power or ground planes or traces.

Escape vias should be placed in a defined pattern to allow for the maximum amount of routing channels beneath them on the internal layers of the board. These escape or fan-out vias are usually routed before the other traces in the design.

Escape routing: Surface mount components usually need their pins to immediately connect to a via for routing on the internal layers of a multi-layer circuit board.

Regular routing: Thru-hole vias are the standard method of transitioning a signal trace running on one board layer to another.

Thru-hole vias are used for various purposes, including: These vias are drilled all the way through the board at whatever size is required, allowing traces or metal fills to connect to them on any of the board layers. Since the first two-layer circuit boards went into mass production, the standard plated thru-hole via has become a staple in PCB design.

SMD CIRCUIT DESIGN SOFTWARE HOW TO

Here is some more information on PCB via design rules and how you need to work with them to guarantee the performance and manufacturability of your circuit board.Ĭonventional Thru-Hole Vias: Where and How to Use Them Each of these vias may have different rules associated with them, and your job as a designer is to keep them all organized and apply the correct rules for each in the CAD system.

While using a via would seem to be a straightforward operation, there can be many different types of vias in use on your design. To do this requires routing the traces through the circuit board design and transitioning them between layers with small holes known as vias. As a circuit board layout designer, your job is to organize and design these elements to connect them correctly without allowing them to come into contact with other signal or power nets. Thru-hole and microvias in a 3D view of PCB routingĬircuit boards can contain thousands of traces, pads, and holes to conduct signals and power between component pins. Conventional thru-hole vias-where and how to use them.Įxamining the makeup and use of blind, buried, and microvias.