PCB-Layers

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PCB-Layers

Printed circuits and footprints both contain the following layers.

Document

the document layer contains graphics that you can add to document your design. There are no restrictions on color and style etc.

Net

the net layer displays unrouted track segments.

If a footprint is placed outside the PCB area and the footprint  net does not connect to any footprints inside the PCB area then the net that connect to the footprint will not appear. This is to avoid clutter. However when you move the footprint that is outside the PCB area the nets will be displayed.

Top Package

the top package layer contains graphics that define the 3-D content on the top of the PCB/footprint.

Top Silkscreen

the top silk screen layer defines the graphics that will be used to print a graphics design on the top of the PCB.

Top Copper

The top copper is used to define the copper tracks, but shapes, copper filled regions etc. that will be on the underside of the PCB.

Bottom Copper

The bottom copper is used to define the copper tracks, but shapes, copper filled regions etc. that will be on the underside of the PCB.

Bottom Silkscreen

The top silk screen layer defines the graphics that will be used to print a graphics design on the top of the PCB.

Bottom Package

The bottom package layer contains graphics that define the 3-D content on the underside of the PCB/footprint.

Background

The background can be used for graphics that you want to be displayed underneath all the other layers. It is useful for adding objects such as images that you want to use as a trace pattern.

Inner Layers

PCBs can also have a number of inner layers.