In some designsflows, you need to connect two plane shapes on the same net, but on different layers, together with vias in order to improve connectivity. These “shorting” vias are placed in a regular pattern across the overlapping areas of the shape, in such a way as not to interfere with any routing on layers between the two shapes.
The 16.6 Allegro Package Designer (APD) product now provides a mechanism for constructing these arrays of shape-to-shape shorting via arrays, deleting them, and updating them as the design progresses.
Read on for more details …
You first select the two shapes to be shorted together. This will update the form fields to restrict the padstacks available, and, if parameters already exist for this shape pairing, will optionally load the existing via array values. You can customize any fields as necessary on the form, and finally presses the “Add Vias” or “Remove Vias” button to perform the desired operation.
Note: If the two selected shapes already have a via array between them, it will be cleared before generating a new array.
Manufacture > Shape Via Shorting:
The RMB popup menu, shown below, contains the standard Done, Oops, and Cancel items. As well as entries for add vias and for remove vias:
Below we have a substrate with GND planes on the Surface and Base layers that we would like to connect with seed vias:
We bring up the Shape Shorting Via Array tool and set it as needed. Select the two shapes to be shorted on the work surface and then select the Add Vias button:
The shapes are now shorted together per our settings:
Please share your experience using this new capability!
Jerry "GenPart" Grzenia