PCB Layout CAD - Route/Via

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PCB Layout CAD : DRC/MRC Settings

Route/Via

Configure Route Width Default values and configure the Minimum Line Width and Maximum Line Width that will be checked when executing Run DRC.
It is also possible to specify the Shape for Smoothing Routes when the Route Width is changed during designing, and to set the Via Shape used for toggling layers while routing.
With DRC, it is checked whether unregistered Vias are used, and Route Width Violations are checked.

For more details about opening the DRC/MRC Settings screen, refer to About DRC/MRC Settings.

Example Route Settings

Setting Method

First, in Settings, there is an "Assignment" tab and "Advanced Settings" tab.
The "Advanced Settings" tab is used for configuring actual settings, and the "Assignment" tab is used for configuring which settings are assigned to which Net.

About the Work Procedure

STEP 1: Create a Net Class from the "Net Class" item
STEP 2: Configure settings in the "Advanced Settings" tab
STEP 3: Assign settings to the Net Class in the "Assignment" tab

The following will explain each setting tab.

Explanation of Each Setting Tab

Tab Name

Content

Assignment

It is possible to assign the "Settings" that are applied to Nets set in the "Net Class".

For example, you can create a "Power Supply Net Class (GND, VCC)" Net Class, and assign the setting for "Power Supply Net Settings".
When it is not necessary to divide settings for each Net, all Nets apply to "DefaultClass", so, assign "DefaultSetting".
* All Nets not individually assigned in the Net Class are "DefaultClass".

Advanced Settings

Configures actual settings.
Multiple definition is possible for settings.

Advanced Settings

For more details about adding settings, refer to Adding Settings.

Route Settings

Example Route Settings

Route Width

Item	Content
Minimum Line Width	This item is checked by "Online DRC" and "Run DRC". When a route width is smaller than a specified value, a "Route Width Violation" error will be detected.
Default Line Width	Sets the Route Width that applies when starting to draw a route.
Maximum Line Width	This item is checked by "Online DRC" and "Run DRC". When a route width is larger than a specified value, a "Route Width Violation" error will be detected.

Smoothing Routes

Item

Content

Smoothing Routes

This is a check for whether to execute Smoothing Routes. When Smoothing Routes is enabled, this applies to all routes including routes that have already been drawn and routes that will be drawn.

Shape

Specifies the shape for Smoothing Routes.

Line	Arc

* "Diameter Ratio": Specifies the smoothing diameter ratio for routes with a thick Route Width. (Set this to 1.0 or smaller.)
　"Length Ratio": Specifies the smoothing length ratio for Line Widths with a thick route. The distance in light blue is the ratio for the route.

The distance in orange is "Route Width × Length Ratio + Radius × Diameter Ratio". * Keep in mind that the distance differs according to the Diameter Ratio.

Via Settings

It is also possible to set the Via Shape that applies automatically for toggling layers while routing.
Multiple registration is also possible, and you can confirm which Via applies from the "Via" item in the Property Window while routing.
To toggle among multiple registered Vias, toggle using the "Via" item in the Property Window, or change it using the Right Click Menu => [Toggle Via].

Example Via Settings

The Via at the top of Available Vias is the default Via.
To change the Via while working, select a Via from "Via" in the Property Window or on the Select Via screen that appears when toggling layers using the "L Key".
For more details, refer to Routing Operations.

The shapes of Vias that have already been drawn will not be changed.

Drill Settings

Item	Content
Hole Diameter	Sets the drill diameter.
Tolerance	Sets the tolerance for the drill diameter. This is shown for NC Drill Files and Print NC Drill Lists.

Land Settings

Item	Content
Top	Sets the land diameter of the Top surface.
Inner	Sets the land diameter of the Inner layer.
Bottom	Sets the land diameter of the Bottom surface.

Solder Resist Settings(Land edge)

Item	Content
Top	Solder Resist Settings for the Top surface. Enable/Invalid is toggled using the check on the left side. Place a check when you want to prepare Solder Resist for a Via. The setting is the specification for One Side Oversize. When it is a positive number, it is larger than the land, and when it is a negative number, it is smaller than the land. If it is the same size as the land, specify "0".
Bottom	Solder Resist Settings for the Bottom surface. Enable/Invalid is toggled using the check on the left side. Place a check when you want to prepare Solder Resist for a Via. The setting is the specification for One Side Oversize. When it is a positive number, it is larger than the land, and when it is a negative number, it is smaller than the land. If it is the same size as the land, specify "0".

Other Settings

Item	Content
Pad Name	You can give an arbitrary name for the created Via shape. This does not need to be set. Ex.) MIiniVia, etc.
Layer From	Sets Layer From for the Via.
Layer To	Sets Layer To for the Via.

* Vias are through from Layer From to Layer To.
Specify the Layer From and Layer To for Inner Via Holes (Non Through holes between necessary layers without passing through in order to connect Conductors that exist in different layers in the Inner Layers of a board).

Layer Settings

For more details, refer to Layer Settings.

Assignment Settings

"Assignment" Settings

It is possible to assign the "Settings" that are applied to Nets set in the "Net Class".

The Net Class set in the "Net Class" tab will be displayed.

(1)	Select settings.

About "DefaultClass" for Net Class, refer to "DefaultSetting" in Advanced Settings,
and about "Power" for Net Class, refer to "Power" in Advanced Settings.

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