How To Measure Distance In Pads Layout View

Four layer circuit boards accept the usual two external surfaces and two boosted internal copper surfaces. You can pattern and order iv layer boards in Pad2Pad. For case, you lot might desire to use a four layer board to improve capacitive coupling between power and ground and to reduce the size of a circuit board since less infinite will be taken by power and ground traces.

To design a four-layer circuit lath:

1. ChooseJob | Settings
2. ChooseSpecifications
3. SelectNumber of Layers | 4 Layers.
4. ClickOK.
5. To connect a multi-layer pad pad or a via to an internal layer of a iv-layer lath, select the pad or via in the workspace and fix theproperty barNet holding toPower orBasis. (You tin as well exercise cyberspace assignment inNets | Edit Nets.)

Four layer circuit boards provide two actress solid internal copper layers. By default internal layers are continued to Ability andGround nets only y'all can change that assignment in the Edit Nets Dialog. Pad2pad uses the following pattern to connect a multilayer pad to an internal layer when the "Thermal" connexion type is selected for the pad (this is default setting): when the "Solid" connection type is selected for the pad: and the following pattern when non connected to an internal layer:

To betoken for a pad whether to apply solid connection:

1. Click a pad.
2. On the property bar click the Additional properties push.
3. Beneath "Connexion to inner layer planes" choose "Solid"*.
4. Click OK.

* The option is non bachelor if it'southward not a iv-layer lath or if the pad net belongings is not Power or Ground. The width of the clearance around vias and holes can be specified atJob | Settings | Specifications | Width of clearance around vias and holes. To view the internal layers, selectView | Layers and gear up checkmark next to "1st inner" and "2d inner" to open a iv-layer view and run across the inner layers.  Apply theJob | Clarify command to find partial internet errors where a multi-layer-pad that should exist connected to an inner plane is non continued. Utilize the "X" button in the upper right corner to close the four-layer view or but close the layer dialog. Unremarkably internal layers are generated automatically. Even so you can also use inner layers for traces.

To create a four-layer board with traces on the inner layers:

1. CullFile | New.
2. InJob | Settings | Specifications choose 4-layers and inSpecial Requirements enter "Employ inner layers from separate PCB file provided."
3. Create footprints and traces for outer layers.
4. ChooseFile | Salve As… and proper noun like "my outer layers".
5. ChooseView | Layers and select an inner layer.
6. ChooseFile | Save As… and proper noun similar "my inner layers.pcb".
7. Remove car-generated copper polygons that are not needed.
8. Add together pads to the holes where inner layer traces volition exist continued. For precise positioning please enable the snap-to-line fashion.
9. Add the traces on inner layer(due south).
10. Don't shift origin betoken.
11. ChooseFile | Salvage.
12. ChooseWindow | "my outer layers" to switch dorsum to the 4-lyer design.
13. From the bill of fare place your order.
14. Send the inner layer file with message "Please add to my four-layer lodge placed today".

Source: https://www.pad2pad.com/help/vias-pads/

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