Module 12: Design Rules - Altium

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Module 12: Design Rules 12.1 Design rules and design rule checking ........................................ 12-1 12.1.1 Adding design rules......................................................................................12-1 12.1.2 Design rules concepts..................................................................................12-2 12.1.3 How rules are checked.................................................................................12-4 12.1.4 Where rules apply ........................................................................................12-6 12.1.5 From-tos .......................................................................................................12-8 12.1.6 Exercise – Setting up the design rules.........................................................12-8 12.1.7 Design Rule Checking..................................................................................12-9 12.1.8 Exercise – Running a DRC ........................................................................12-10 Software, documentation and related materials: Copyright © 2009 Altium Limited. All rights reserved. You are permitted to print this document provided that (1) the use of such is for personal use only and will not be copied or posted on any network computer or broadcast in any media, and (2) no modifications of the document is made. Unauthorized duplication, in whole or part, of this document by any means, mechanical or electronic, including translation into another language, except for brief excerpts in published reviews, is prohibited without the express written permission of Altium Limited. Unauthorized duplication of this work may also be prohibited by local statute. Violators may be subject to both criminal and civil penalties, including fines and/or imprisonment. Altium, Altium Designer, Board Insight, Design Explorer, DXP, LiveDesign, NanoBoard, NanoTalk, P-CAD, SimCode, Situs, TASKING, and Topological Autorouting and their respective logos are trademarks or registered trademarks of Altium Limited or its subsidiaries. All other registered or unregistered trademarks referenced herein are the property of their respective owners and no trademark rights to the same are claimed. Module Seq = 12
12.1 Design rules and design rule checking In Altium Designer, design rules are used to define the requirements of your design. These rules cover every aspect of the design – from routing widths, clearances, plane connection styles, routing via styles, and so on. Rules can be monitored as you work and you can also run a batch test at any time and produce a DRC report. Altium Designer design rules are not attributes of the objects; they are defined independently of the objects. Each rule has a scope that defines which objects it must target. Rules are applied in a hierarchical fashion, for example, there is a clearance rule for the entire board, then perhaps a clearance rule for a class of nets, then perhaps another for one of the pads in a class. Using the rule priority and the scope, the PCB Editor can determine which rule applies to each object in the design. This section describes how design rules are defined and how to check for design rule violations. 12.1.1 Adding design rules Design rules are defined in the PCB Rules and Constraints Editor dialog that is displayed by selecting Design » Rules. Figure 1. PCB Rules and Constraints Editor dialog. To set up a design rule: 1. Click on the to expand the required rule category in the tree on the left. 2. Click on the next to the rule kind to display the rules of that kind that have been defined. Notice how in Figure 1 the tree is expanded to show the four Width rules. 3. Click on a specific rule to display the properties of that rule. 4. Right-click on a rule kind to add a new rule of that kind. Module 12: Design Rules 12 - 1
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Module 12: Design Rules - Altium

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