Applied Parameters: Action=SingleComponent|ContextObject=Component
This command is used to fanout the pads of the surface mount component currently under the cursor, that connect to both signal and power plane nets and in accordance with specified fanout options and applicable design rules.
This command is accessed from the PCB Editor by right-clicking over the required component (selected or not) in the workspace then choosing the Component Actions » Fanout Component command from the context menu.
First, ensure that the cursor is currently over the SMT component (selected or not) whose pads you wish to fan out.
After launching the command, the Fanout Options dialog will open. Use this dialog to specify fanout and escape routing options. Typical fanout behavior is for used inner pads to first be fanned out using the traditional dog-bone (a short route with a via on the end) to access another layer, then from the via, they are escape routed out just beyond the edge of the device, working through the available routing layers until all pads have been escape routed. Ultimately, this makes routing connections to them much easier.
With options configured as required, click OK - each of the signal and power pads belonging to the component will be fanned out, where possible. Fanout and escape routing is done in accordance with the options specified in the Fanout Options dialog, as well as the applicable design rules, including the Fanout Control rule, Width rule (for additional track laid down), Routing Via Style rule (for dropped fanout vias), Routing Layers rule, and the Clearance rule.
- If a component contains pads that are not connected to any nets, a dialog will appear asking if you wish to fanout these pads as well.
- Running this command is equivalent to running both the Fan out Signal and Fan out to Plane passes in a strategy defined for the Autorouter.
- If you use any of the fanout commands before autorouting the board, there is no need to lock the preroutes unless you have additional manual routing or have modified the fanout routing in some way.
- To fanout the pads of a component, make sure that there is no polygon pours under this component on any layer. Polygons can be shelved before creating fanouts and restored afterward.