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Working with a Region Keepout Object on a PCB in Altium Designer - Altium designer 17 keepout layer free
As shown in the section of board layout, the track routed between the two pads avoids the Keepout region on the right by a larger margin than the Top Layer region left.
The PCB List panel can be used to list, select and edit Keepout object of the selected type — for example, Keepout Fills, as shown in the below List panel image. A standard Top Layer Fill the last listed is also shown for comparison. If all the Fills or other types of objects, such as Regions included in the design are assigned as Keepouts, then the PCB List panel will include the full set of Keepout object Restriction attributes.
Previous releases of Altium Designer prior to version The automated Keepout object conversion is as outlined below:. Altium Designer is able to import design files from a wide range of other design tools using the automated conversion capabilities provided by the Import Wizard File » Import Wizard.
Keepout type objects that are included in PCB design files from other design tools, some of which are object specific, are converted to Object Specific Keepouts by the Wizard, where possible. Correct Keepout interpretation also occurs during the IDF export process. Using Altium Documentation. Now reading version Keepouts can be placed on all copper signal layers, excluding copper planes. When currently active board layer is not compatible with Keepouts, the Place » Keepout command is not available grayed out.
Keepouts are automatically restricted to the Layer they are placed on, so Keepouts applied directly to the Keep-Out layer will become All Layer Keepouts. When the Keepout Layer is changed, the Keepout will be limited to, and appear on, the specified Layer. Note that a conventional non Keepout object cannot be placed on the Keep-Out Layer. The Keepout object shown associated with C9 was added to that component in the PCB Library Editor , and is therefore part of its component definition.
Note that the approach to controlling Polygon Pour areas is used here as an example for placing and configuring Layer Specific Keepouts. Keepout objects can be converted back to their equivalent non-Keepout primitive objects using the Tools » Convert » Convert Selected Keepouts to Primitives command.
Roll the mouse over the image to compare the two modes available. The rule scope returns a set of objects, the constraints detailed below are then applied to that set of objects:. For a defined Same-Net Only Clearance rule, the general approach is that if two objects are touching i. The exception to this is when checking the clearance between via and SMD pad objects in the same net.
When a via and SMD pad have soldermask clearance, and the two are too close together, the soldermask bridge between the two objects can disappear and solder paste will flow down into the via during the soldering process, creating a bad solder joint on the SMD pad. Even if a via and SMD pad are connected with a trace or overlapping, they are deemed to be in violation when the distance between them is less than the Via-SMD Pad clearance in the Same-Net Clearance rule.
For many users, there is no great difference between Track and Arc primitives. And when it comes to Fill, Region, and Polygon objects, most users just see these as more 'copper. With the required selection made either a single cell or multiple cells , making a change to the current value is simply a case of typing the new value required. To submit the newly entered value, either click away on another cell, or press Enter.
All cells in the selection will be updated with the new value. Example multi-cell editing. Designers can check clearances between the edges of drill holes and neighboring copper objects on signal layers. This is particularly beneficial in preventing the routing of track too near to a drilled hole, which could otherwise suffer from any potential wandering of the drill during board fabrication. The row at the bottom of the Clearance rule's minimum clearance matrix is used to define the desired clearances.
Set clearance values to catch any copper objects that are too close to the edges of drill holes in the design. Designers can also check clearances between split plane regions on internal plane layers.
How clearance is defined depends on the mode in which you are using the minimum clearance matrix:. As is the case for other object primitives, the current Electrical Clearance Rule will determine the clearance constraints for Keepouts — see Design » Rules. Ensure that the custom Keepout Clearance Rule is set to a higher priority than the existing global Clearance Rule.
As shown in the section of board layout, the track routed between the two pads avoids the Keepout region on the right by a larger margin than the Top Layer region left.
An additional Clearance rule for Keepout objects can be created. Existing primitive objects on signal layers can be converted to Keepouts, on the same layer, using the Convert Primitives to Keepouts command Tools » Convert » Convert Selected Primitives to Keepout. A primitive object can be converted to an equivalent Keepout object and vice-versa. The PCB List panel can be used to list, select and edit the Keepout object of the selected type — for example, Keepout Fills, as shown in the below List panel image.
A standard Top Layer Fill the last listed is also shown for comparison. If all the Fills or other types of objects, such as Regions included in the design are assigned as Keepouts, then the PCB List panel will include the full set of Keepout object Restriction attributes. Altium Designer is able to import design files from a wide range of other design tools using the automated conversion capabilities provided by the Import Wizard File » Import Wizard.
Keepout type objects that are included in PCB design files from other design tools, some of which are object-specific, are converted to Object Specific Keepouts by the Wizard, where possible. Correct Keepout interpretation also occurs during the IDF export process.
Using Altium Documentation. Keepouts can be placed on all copper signal layers, excluding copper planes. When the currently active board layer is not compatible with Keepouts, the Place » Keepout command is not available grayed out.
Note that the approach to controlling Polygon Pour areas is used here as an example for placing and configuring Layer Specific Keepouts. Keepout objects can be converted back to their equivalent non-Keepout primitive objects using the Tools » Convert » Convert Selected Keepouts to Primitives command. Note that the Keepout attribute listed in the PCB List panels is read-only since the Fill, in this case, is designated as a Keepout object. Similarly, the Net attribute for Keepout objects in the PCB List panel cannot be edited because Keepout objects, by definition, cannot be assigned to a Net.
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