Contents
How to create a ground plane in Altium?
Using an Internal Plane in Creating a Ground Plane. In Altium Designer, you can create your planes either as a negative (Internal) plane or as a positive plane (Polygon Pour). First we will look at the process of creating a negative or “Internal” plane. The first thing to do when creating an internal plane is to add a design layer specifically
How to create a polygon pour in Altium?
To create the polygon pour you can either use the pulldown menu command “Place > Polygon Pour”, or you can click on the polygon icon in the active bar at the top of the session window. Creating a Polygon Pour in Altium Designer.
What happens if you separate a star ground?
If you were to separate their grounds, you will end up routing over the gap between the two reference planes, creating an undefined return path with large parasitic loop inductance. This area becomes a strong emitter/receiver of EMI. This situation is shown in the image below.
Can a CAD system create a negative ground plane?
You have the choice of creating a ground plane that is either a positive copper fill, or a negative plane depending on what your needs are. Any CAD system can do this, but some are better at it than others. Take Altium Designer for example.
How to create a stack in Altium Designer 21?
If the Stack Symmetry option is enabled in the Board section of the Properties panel, layers are added in matching pairs, centered around the mid-dielectric layer. The layer Material can either be typed into the selected Material cell or selected in the Select Material dialog, which is accessed by clicking the button.
When to add a dielectric layer in Altium?
Adding a Signal or Plane (copper) layer will also add a dielectric layer when an existing adjacent layer is also a copper layer. If the Stack Symmetry option is enabled in the Board section of the Properties panel, layers are added in matching pairs, centered around the mid-dielectric layer.
How is a region defined in Altium Designer?
A region ( Place » Solid Region) is a design object that is used for defining polygonal shapes. A Solid Region (commonly called Region) can be placed on any layer including signal (copper) layers. Like a Fill, a Region does not avoid other objects, such as pads, vias, tracks, fills, other regions or text.
How to create a ground plane for your PCB design?
In the picture below, you can see in that two layers have been added as internal planes in the layer stack manager, which is found in the “Design” pulldown menu. They have been named “GND” and “PWR” respectively and occupy layers two and three.
When to use ground plane in PCB stackup?
PCB ground plane design starts with the right stackup. Higher layer counts might use multiple ground and power plane arrangements, making the stackup more complicated. However, whether we have a 4-layer stackup or more layers, the primary power planes should have a ground plane in an adjacent layer.
How are polygons different from plane layers in Altium?
Altium distinguishes polygon pours from plane layers. Polygons are positive features on positive (signal) layers, that fill large (or small) areas. Plane layers are negative layers where copper is present on the entire surface, except where features are defined.
What can I do with Altium Designer platform?
If you are interested in learning more, talk to an Altium Designer expert today. When you’ve finished your design, and you want to release files to your manufacturer, the Altium 365 ™ platform makes it easy to collaborate and share your projects. We have only scratched the surface of what is possible to do with Altium Designer on Altium 365.