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Ansoft Designer / Ansys Designer 在线帮助文档：

Layout Editor User Guide >
   Importing a Stackup       

Importing a Stackup

In certain instances it may be easier to define your dielectric and metal layer stackup by importing an XML based “control file" using the Edit Layers dialog. For example, if you have a standard technology process, and you want to assure that all the designs you create in Designer use this process, you can import a control file to guarantee that all the stackups are identical.

The XML control file can be created using a third party text editor or a script. In some cases, extremely complex stackups can be more easily created outside of Designer and then imported, rather than creating the stackups using the Designer interface. For more information on the format of the XML layer control file, see Layout and ODB++ Control File.

To import a stackup, open the Edit Layers dialog by clicking its toolbar icon or by selecting Layout > Layers. Next, click on the Import Stackup button. A series of dialogs will open that allow you to browse to the XML control file and import the stackup. The exact series of steps will depend on whether the design has existing layers and whether the layers contain geometry. In all cases the imported stackup will possess alternating dielectric-signal layer pairs that create a "pancake" stackup. In certain instances the import mechanism will add additional dielectric/metal layers to create the pancake stackup.

The Design Does Not Have Existing Layers

The Layout/ODB++ Control file can be imported directly. A File Open dialog will appear that allows you to browse to the XML layer control file.

The Design Has Existing Layers

After clicking the Import Stackup button, a warning may display that indicates at least one of the existing layers contains geometry. A dialog then offers the option of replacing or updating the existing layers. After updating/replacing existing layers, a File Open dialog appears that allows you to browse to the XML layer control file.

• Replace existing layers — All existing layers in the design are discarded and layers from the Layout/ODB++ Control File are inserted into the design. Geometry on any of the existing layers may be moved to different layers. After importing a stackup into a design with existing geometry, it is important to recheck your design.

• Update existing layers — The import mechanism will attempt to merge the existing design layers with those in the Layout/ODB++ Control File. In some cases the import mechanism cannot merge the layers and you will not be able to import the Layout/ODB++ Control file. The following examples illustrate the results when a one-to-one match does not exist between existing and imported layers. The XML file and existing stackup contain layers of type signal ("S") and dielectric ("D") — i.e., the name "S1" signifies a signal layer (but the layer names you choose can be arbitrary).

Example 1: One to one mapping. This is the simplest case where existing layers are updated with new material properties and thicknesses. The matching of layer names is case insensitive.

Example 2: Merge not possible. In this case the layers in the XML file are very different from the layers in the existing stackup and the import mechanism cannot create a merged stackup.

Example 3: Additional layers. In this case the XML file has one or more additional layers. The import mechanism will update existing material properties and thicknesses and add the additional layers.

Example 4: Automatic layer addition. The import mechanism will add dielectric or signal layers to create a strict pancake stackup.

Layer "S0_DIEL" is a dielectric layer added by the import mechanism with defaults for the material and thickness.

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