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<div>LEF&#47;DEF 5.8 Language Reference</div>
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</p><h1>Contents</h1>
<div>
<h2> <a name=""></a><a href="preface.html" title="Preface" name="214940"><font color="#0000ff"><u>Preface</u></font></a></h2>
<p> <a name=""></a><a href="preface.html#1017612" title="Preface" name="214942"><font color="#0000ff"><u>What's New</u></font></a></p>
<p> <a name=""></a><a href="preface.html#conventions" title="Preface" name="214944"><font color="#0000ff"><u>Typographic and Syntax Conventions</u></font></a></p>
<h2><a href="LEFSyntax.html" title="1" name="214946"><font color="#0000ff"><u>1</u></font>
</a></h2>
<h2> <a name=""></a><a href="LEFSyntax.html#1087299" title="1" name="214948"><font color="#0000ff"><u>LEF Syntax</u></font></a></h2>
<p> <a name=""></a><a href="LEFSyntax.html#952855" title="1" name="214950"><font color="#0000ff"><u>About Library Exchange Format Files</u></font></a></p>
<dd> <a name=""></a><a href="LEFSyntax.html#980814" title="1" name="214952"><font color="#0000ff"><u>General Rules</u></font></a></dd>
<dd> <a name=""></a><a href="LEFSyntax.html#1098095" title="1" name="214954"><font color="#0000ff"><u>Character Information</u></font></a></dd>
<dd> <a name=""></a><a href="LEFSyntax.html#ManagingLEFFiles" title="1" name="214956"><font color="#0000ff"><u>Managing LEF Files</u></font></a></dd>
<dd> <a name=""></a><a href="LEFSyntax.html#LEFStatementOrder" title="1" name="214958"><font color="#0000ff"><u>Order of LEF Statements</u></font></a></dd>
<p> <a name=""></a><a href="LEFSyntax.html#972773" title="1" name="214960"><font color="#0000ff"><u>LEF Statement Definitions</u></font></a></p>
<dd> <a name=""></a><a href="LEFSyntax.html#BusBitCharacters" title="1" name="214962"><font color="#0000ff"><u>Bus Bit Characters</u></font></a></dd>
<dd> <a name=""></a><a href="LEFSyntax.html#ClearanceMeasure" title="1" name="214964"><font color="#0000ff"><u>Clearance Measure</u></font></a></dd>
<dd> <a name=""></a><a href="LEFSyntax.html#DividerCharacter" title="1" name="214966"><font color="#0000ff"><u>Divider Character</u></font></a></dd>
<dd> <a name=""></a><a href="LEFSyntax.html#Extensions" title="1" name="214968"><font color="#0000ff"><u>Extensions</u></font></a></dd>
<dd> <a name=""></a><a href="LEFSyntax.html#fixedmask" title="1" name="214970"><font color="#0000ff"><u>FIXEDMASK</u></font></a></dd>
<dd> <a name=""></a><a href="LEFSyntax.html#Layer(Cut)" title="1" name="214972"><font color="#0000ff"><u>Layer (Cut)</u></font></a></dd>
<dd> <a name=""></a><a href="LEFSyntax.html#Layer(Implant)" title="1" name="214974"><font color="#0000ff"><u>Layer (Implant)</u></font></a></dd>
<dd> <a name=""></a><a href="LEFSyntax.html#Layer(MastersliceorOverlap)" title="1" name="214976"><font color="#0000ff"><u>Layer (Masterslice or Overlap)</u></font></a></dd>
<dd> <a name=""></a><a href="LEFSyntax.html#Layer(Routing)" title="1" name="214978"><font color="#0000ff"><u>Layer (Routing)</u></font></a></dd>
<dd> <a name=""></a><a href="LEFSyntax.html#5524143" title="1" name="214980"><font color="#0000ff"><u>Library</u></font></a></dd>
<dd> <a name=""></a><a href="LEFSyntax.html#Macro" title="1" name="214982"><font color="#0000ff"><u>Macro</u></font></a></dd>
<dd> <a name=""></a><a href="LEFSyntax.html#ManufacturingGrid" title="1" name="214984"><font color="#0000ff"><u>Manufacturing Grid</u></font></a></dd>
<dd> <a name=""></a><a href="LEFSyntax.html#MaximumViaStack" title="1" name="214986"><font color="#0000ff"><u>Maximum Via Stack</u></font></a></dd>
<dd> <a name=""></a><a href="LEFSyntax.html#NondefaultRule" title="1" name="214988"><font color="#0000ff"><u>Nondefault Rule</u></font></a></dd>
<dd> <a name=""></a><a href="LEFSyntax.html#PropertyDefinitions" title="1" name="214990"><font color="#0000ff"><u>Property Definitions</u></font></a></dd>
<dd> <a name=""></a><a href="LEFSyntax.html#Site" title="1" name="214992"><font color="#0000ff"><u>Site</u></font></a></dd>
<dd> <a name=""></a><a href="LEFSyntax.html#Units" title="1" name="214994"><font color="#0000ff"><u>Units</u></font></a></dd>
<dd> <a name=""></a><a href="LEFSyntax.html#UseMinSpacing" title="1" name="214996"><font color="#0000ff"><u>Use Min Spacing</u></font></a></dd>
<dd> <a name=""></a><a href="LEFSyntax.html#Version" title="1" name="214998"><font color="#0000ff"><u>Version</u></font></a></dd>
<dd> <a name=""></a><a href="LEFSyntax.html#918957" title="1" name="215000"><font color="#0000ff"><u>Via</u></font></a></dd>
<dd> <a name=""></a><a href="LEFSyntax.html#ViaRule" title="1" name="215002"><font color="#0000ff"><u>Via Rule</u></font></a></dd>
<dd> <a name=""></a><a href="LEFSyntax.html#ViaRuleGenerate" title="1" name="215004"><font color="#0000ff"><u>Via Rule Generate</u></font></a></dd>
<h2><a href="DEFINEandALIAS.html" title="2" name="215006"><font color="#0000ff"><u>2</u></font>
</a></h2>
<h2> <a name=""></a><a href="DEFINEandALIAS.html#919793" title="2" name="215008"><font color="#0000ff"><u>ALIAS Statements</u></font></a></h2>
<p> <a name=""></a><a href="DEFINEandALIAS.html#ALIAS Statements" title="2" name="215010"><font color="#0000ff"><u>ALIAS Statements</u></font></a></p>
<dd> <a name=""></a><a href="DEFINEandALIAS.html#Alias Definition" title="2" name="215012"><font color="#0000ff"><u>ALIAS Definition</u></font></a></dd>
<dd> <a name=""></a><a href="DEFINEandALIAS.html#Alias Examples" title="2" name="215014"><font color="#0000ff"><u>ALIAS Examples</u></font></a></dd>
<dd> <a name=""></a><a href="DEFINEandALIAS.html#Alias Expansion" title="2" name="215016"><font color="#0000ff"><u>ALIAS Expansion</u></font></a></dd>
<h2><a href="WorkingwithLEF.html" title="3" name="215018"><font color="#0000ff"><u>3</u></font>
</a></h2>
<h2> <a name=""></a><a href="WorkingwithLEF.html#922000" title="3" name="215020"><font color="#0000ff"><u>Working with LEF</u></font></a></h2>
<p> <a name=""></a><a href="WorkingwithLEF.html#918646" title="3" name="215022"><font color="#0000ff"><u>Incremental LEF</u></font></a></p>
<p> <a name=""></a><a href="WorkingwithLEF.html#Error Checking" title="3" name="215024"><font color="#0000ff"><u>Error Checking</u></font></a></p>
<dd> <a name=""></a><a href="WorkingwithLEF.html#Message Facility" title="3" name="215026"><font color="#0000ff"><u>Message Facility</u></font></a></dd>
<dd> <a name=""></a><a href="WorkingwithLEF.html#Error-Checking Facility" title="3" name="215028"><font color="#0000ff"><u>Error&#45;Checking Facility</u></font></a></dd>
<h2><a href="DEFSyntax.html" title="4" name="215030"><font color="#0000ff"><u>4</u></font>
</a></h2>
<h2> <a name=""></a><a href="DEFSyntax.html#948406" title="4" name="215032"><font color="#0000ff"><u>DEF Syntax</u></font></a></h2>
<p> <a name=""></a><a href="DEFSyntax.html#918666" title="4" name="215034"><font color="#0000ff"><u>About Design Exchange Format Files</u></font></a></p>
<dd> <a name=""></a><a href="DEFSyntax.html#968594" title="4" name="215036"><font color="#0000ff"><u>General Rules</u></font></a></dd>
<dd> <a name=""></a><a href="DEFSyntax.html#1030241" title="4" name="215038"><font color="#0000ff"><u>Character Information</u></font></a></dd>
<dd> <a name=""></a><a href="DEFSyntax.html#DEFStatementOrder" title="4" name="215040"><font color="#0000ff"><u>Order of DEF Statements</u></font></a></dd>
<p> <a name=""></a><a href="DEFSyntax.html#962034" title="4" name="215042"><font color="#0000ff"><u>DEF Statement Definitions</u></font></a></p>
<dd> <a name=""></a><a href="DEFSyntax.html#Blockages" title="4" name="215044"><font color="#0000ff"><u>Blockages</u></font></a></dd>
<dd> <a name=""></a><a href="DEFSyntax.html#BusBitCharacters" title="4" name="215046"><font color="#0000ff"><u>Bus Bit Characters</u></font></a></dd>
<dd> <a name=""></a><a href="DEFSyntax.html#ComponentMaskShift" title="4" name="215048"><font color="#0000ff"><u>Component Mask Shift</u></font></a></dd>
<dd> <a name=""></a><a href="DEFSyntax.html#Components" title="4" name="215050"><font color="#0000ff"><u>Components</u></font></a></dd>
<dd> <a name=""></a><a href="DEFSyntax.html#Design" title="4" name="215052"><font color="#0000ff"><u>Design</u></font></a></dd>
<dd> <a name=""></a><a href="DEFSyntax.html#DieArea" title="4" name="215054"><font color="#0000ff"><u>Die Area</u></font></a></dd>
<dd> <a name=""></a><a href="DEFSyntax.html#DividerCharacter" title="4" name="215056"><font color="#0000ff"><u>Divider Character</u></font></a></dd>
<dd> <a name=""></a><a href="DEFSyntax.html#Extensions" title="4" name="215058"><font color="#0000ff"><u>Extensions</u></font></a></dd>
<dd> <a name=""></a><a href="DEFSyntax.html#Fills" title="4" name="215060"><font color="#0000ff"><u>Fills</u></font></a></dd>
<dd> <a name=""></a><a href="DEFSyntax.html#GCellGrid" title="4" name="215062"><font color="#0000ff"><u>GCell Grid</u></font></a></dd>
<dd> <a name=""></a><a href="DEFSyntax.html#Groups" title="4" name="215064"><font color="#0000ff"><u>Groups</u></font></a></dd>
<dd> <a name=""></a><a href="DEFSyntax.html#History" title="4" name="215066"><font color="#0000ff"><u>History</u></font></a></dd>
<dd> <a name=""></a><a href="DEFSyntax.html#Nets" title="4" name="215068"><font color="#0000ff"><u>Nets</u></font></a></dd>
<dd> <a name=""></a><a href="DEFSyntax.html#NondefaultRules" title="4" name="215070"><font color="#0000ff"><u>Nondefault Rules</u></font></a></dd>
<dd> <a name=""></a><a href="DEFSyntax.html#Pins" title="4" name="215072"><font color="#0000ff"><u>Pins</u></font></a></dd>
<dd> <a name=""></a><a href="DEFSyntax.html#PinProperties" title="4" name="215074"><font color="#0000ff"><u>Pin Properties</u></font></a></dd>
<dd> <a name=""></a><a href="DEFSyntax.html#PropertyDefinitions" title="4" name="215076"><font color="#0000ff"><u>Property Definitions</u></font></a></dd>
<dd> <a name=""></a><a href="DEFSyntax.html#Regions" title="4" name="215078"><font color="#0000ff"><u>Regions</u></font></a></dd>
<dd> <a name=""></a><a href="DEFSyntax.html#Rows" title="4" name="215080"><font color="#0000ff"><u>Rows</u></font></a></dd>
<dd> <a name=""></a><a href="DEFSyntax.html#ScanChains" title="4" name="215082"><font color="#0000ff"><u>Scan Chains</u></font></a></dd>
<dd> <a name=""></a><a href="DEFSyntax.html#Slots" title="4" name="215084"><font color="#0000ff"><u>Slots</u></font></a></dd>
<dd> <a name=""></a><a href="DEFSyntax.html#SpecialNets" title="4" name="215086"><font color="#0000ff"><u>Special Nets</u></font></a></dd>
<dd> <a name=""></a><a href="DEFSyntax.html#Styles" title="4" name="215088"><font color="#0000ff"><u>Styles</u></font></a></dd>
<dd> <a name=""></a><a href="DEFSyntax.html#Technology" title="4" name="215090"><font color="#0000ff"><u>Technology</u></font></a></dd>
<dd> <a name=""></a><a href="DEFSyntax.html#Tracks" title="4" name="215092"><font color="#0000ff"><u>Tracks</u></font></a></dd>
<dd> <a name=""></a><a href="DEFSyntax.html#Units" title="4" name="215094"><font color="#0000ff"><u>Units</u></font></a></dd>
<dd> <a name=""></a><a href="DEFSyntax.html#Version" title="4" name="215096"><font color="#0000ff"><u>Version</u></font></a></dd>
<dd> <a name=""></a><a href="DEFSyntax.html#Vias" title="4" name="215098"><font color="#0000ff"><u>Vias</u></font></a></dd>
<h2><a href="Examples.html" title="A" name="215100"><font color="#0000ff"><u>A</u></font>
</a></h2>
<h2> <a name=""></a><a href="Examples.html#920628" title="A" name="215102"><font color="#0000ff"><u>Examples</u></font></a></h2>
<p> <a name=""></a><a href="Examples.html#918644" title="A" name="215104"><font color="#0000ff"><u>LEF</u></font></a></p>
<p> <a name=""></a><a href="Examples.html#918664" title="A" name="215106"><font color="#0000ff"><u>DEF</u></font></a></p>
<p> <a name=""></a><a href="Examples.html#918708" title="A" name="215108"><font color="#0000ff"><u>Scan Chain Synthesis Example</u></font></a></p>
<h2><a href="OptimizingLEFTechnology.html" title="B" name="215110"><font color="#0000ff"><u>B</u></font>
</a></h2>
<h2> <a name=""></a><a href="OptimizingLEFTechnology.html#1031927" title="B" name="215112"><font color="#0000ff"><u>Optimizing LEF Technology for Place and Route</u></font></a></h2>
<p> <a name=""></a><a href="OptimizingLEFTechnology.html#1031962" title="B" name="215114"><font color="#0000ff"><u>Overview</u></font></a></p>
<p> <a name=""></a><a href="OptimizingLEFTechnology.html#1031996" title="B" name="215116"><font color="#0000ff"><u>Guidelines for Routing Pitch</u></font></a></p>
<p> <a name=""></a><a href="OptimizingLEFTechnology.html#1032229" title="B" name="215118"><font color="#0000ff"><u>Guidelines for Wide Metal Spacing</u></font></a></p>
<p> <a name=""></a><a href="OptimizingLEFTechnology.html#1032245" title="B" name="215120"><font color="#0000ff"><u>Guidelines for Wire Extension at Vias</u></font></a></p>
<p> <a name=""></a><a href="OptimizingLEFTechnology.html#1032644" title="B" name="215122"><font color="#0000ff"><u>Guidelines for Default Vias</u></font></a></p>
<p> <a name=""></a><a href="OptimizingLEFTechnology.html#1033035" title="B" name="215124"><font color="#0000ff"><u>Guidelines for Stack Vias (MAR Vias) and Samenet Spacing</u></font></a></p>
<p> <a name=""></a><a href="OptimizingLEFTechnology.html#1033558" title="B" name="215126"><font color="#0000ff"><u>Example of an Optimized LEF Technology File</u></font></a></p>
<h2><a href="PAE.html" title="C" name="215128"><font color="#0000ff"><u>C</u></font>
</a></h2>
<h2> <a name=""></a><a href="PAE.html#1033512" title="C" name="215130"><font color="#0000ff"><u>Calculating and Fixing Process Antenna Violations</u></font></a></h2>
<p> <a name=""></a><a href="PAE.html#1034563" title="C" name="215132"><font color="#0000ff"><u>Overview</u></font></a></p>
<dd> <a name=""></a><a href="PAE.html#1034595" title="C" name="215134"><font color="#0000ff"><u>What Are Process Antennas?</u></font></a></dd>
<dd> <a name=""></a><a href="PAE.html#1034685" title="C" name="215136"><font color="#0000ff"><u>What Is the Process Antenna Effect (PAE)?</u></font></a></dd>
<dd> <a name=""></a><a href="PAE.html#1034691" title="C" name="215138"><font color="#0000ff"><u>What Is the Antenna Ratio?</u></font></a></dd>
<dd> <a name=""></a><a href="PAE.html#1034778" title="C" name="215140"><font color="#0000ff"><u>What Can Be Done to Improve the Antenna Ratio?</u></font></a></dd>
<p> <a name=""></a><a href="PAE.html#1034861" title="C" name="215142"><font color="#0000ff"><u>Using Process Antenna Keywords in the LEF and DEF Files</u></font></a></p>
<p> <a name=""></a><a href="PAE.html#CalculatingAntennaRatios" title="C" name="215144"><font color="#0000ff"><u>Calculating Antenna Ratios</u></font></a></p>
<dd> <a name=""></a><a href="PAE.html#1039567" title="C" name="215146"><font color="#0000ff"><u>Calculating the Antenna Area</u></font></a></dd>
<dd> <a name=""></a><a href="PAE.html#1034939" title="C" name="215148"><font color="#0000ff"><u>Calculating a PAR</u></font></a></dd>
<dd> <a name=""></a><a href="PAE.html#1035362" title="C" name="215150"><font color="#0000ff"><u>Calculating a CAR</u></font></a></dd>
<dd> <a name=""></a><a href="PAE.html#1036143" title="C" name="215152"><font color="#0000ff"><u>Calculating Ratios for a Cut Layer</u></font></a></dd>
<p> <a name=""></a><a href="PAE.html#1036523" title="C" name="215154"><font color="#0000ff"><u>Checking for Antenna Violations</u></font></a></p>
<dd> <a name=""></a><a href="PAE.html#1036542" title="C" name="215156"><font color="#0000ff"><u>Area Ratio Check</u></font></a></dd>
<dd> <a name=""></a><a href="PAE.html#1036566" title="C" name="215158"><font color="#0000ff"><u>Side Area Ratio Check</u></font></a></dd>
<dd> <a name=""></a><a href="PAE.html#1036590" title="C" name="215160"><font color="#0000ff"><u>Cumulative Area Ratio Check</u></font></a></dd>
<dd> <a name=""></a><a href="PAE.html#1036600" title="C" name="215162"><font color="#0000ff"><u>Cumulative Side Area Ratio Check</u></font></a></dd>
<dd> <a name=""></a><a href="PAE.html#CutProcessAntennaModelExamples" title="C" name="215164"><font color="#0000ff"><u>Cut Layer Process Antenna Model Examples</u></font></a></dd>
<dd> <a name=""></a><a href="PAE.html#RoutingProcessAntennaModelExamples" title="C" name="215166"><font color="#0000ff"><u>Routing Layer Process Antenna Model Examples</u></font></a></dd>
<dd> <a name=""></a><a href="PAE.html#1038786" title="C" name="215168"><font color="#0000ff"><u>Example Using the Antenna Keywords</u></font></a></dd>
<p> <a name=""></a><a href="PAE.html#1036656" title="C" name="215170"><font color="#0000ff"><u>Using Antenna Diode Cells</u></font></a></p>
<dd> <a name=""></a><a href="PAE.html#1036661" title="C" name="215172"><font color="#0000ff"><u>Changing the Routing</u></font></a></dd>
<dd> <a name=""></a><a href="PAE.html#1036670" title="C" name="215174"><font color="#0000ff"><u>Inserting Antenna Diode Cells</u></font></a></dd>
<p> <a name=""></a><a href="PAE.html#1036735" title="C" name="215176"><font color="#0000ff"><u>Using DiffUseOnly</u></font></a></p>
<p> <a name=""></a><a href="PAE.html#CalculateHierDesign" title="C" name="215178"><font color="#0000ff"><u>Calculations for Hierarchical Designs</u></font></a></p>
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