User manual CADENCE DESIGN SYSTEMS ASSURA PHYSICAL VERIFICATION DATASHEET
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Manual abstract: user guide CADENCE DESIGN SYSTEMS ASSURA PHYSICAL VERIFICATIONDATASHEET
Detailed instructions for use are in the User's Guide.
[. . . ] ASSURAPHYSICALVERIFICATION
DATASHEET
ASSURA PHySIcAl VERIFIcATIoN
AssuraPhysicalVerificationformsa keycomponentofthedesign, parasitic extractionandsimulationflowwithinthe VirtuosoCustomDesignPlatform. Asa trustedsolutionwithmanyhundredsof usersworldwide, itenablesdesignteams tocheck, identify, andcorrectdesignand connectivityerrorstoachievedesignsignoffbeforetape-out. [. . . ] A model contains a primary polygon (e. g. , contact, fuse opening, DRC error markers) and environment polygons (e. g. , metals enclosing contact, fuse metals/vias, waivable layout configuration per error marker). Pattern check is triggered by primary polygons in the design.
ElEcTRIcAl RUlE cHEckS
Acomprehensivesetofelectricalrule check(ERC)commandsverifiesthat designsconformtoconnection, tracing, andspecificconnectivitypropertiesthat areestablishedforagivenfabrication processorprocessvariant. AssuraPhysicalVerificationprovidesfull setofERCcapabilities, including: · ExternalConnectionDefinitionRules · PathTracingRules · NonfunctionalDeviceCheckingRules · SpecificConnectivity · DebugGUIsupportforERC
dENSITy cHEck ANd mETAl FIll
AssuraPhysicalVerificationofferscontextsensitivefillpatterns, meaninguserscan placewhateverpatternswherevertheyare neededinthelayout. Userscancustomize fillpatternsandshapes(e. g. , customfill cells, squares, rectangles, skewed, bridging bars)asnecessarytobalancelayout density. Theareafillcommandisalso capableofconnectingareafillfeatures. AssuraPhysicalVerificationcanperform areafillinflatorhierarchicalmode.
gUI-gUIdEd lVS dEBUg ENVIRoNmENT
AssuraPhysicalVerificationoffersaGUI debugenvironmentthatinteractively stepsusersthroughtheprocessof resolvingLVSerrors. OncetheLVSrun iscomplete, userscanchoosetoopen theLVSdebugtools, suchastheshort locatorandrewirefunction, fromthe pop-upwindowtoexamineandcorrect theerrors.
UNIqUE PATTERN cHEckINg cAPABIlITy
Certainadvancedchecks, suchasmetal enclosureofcontactatline-end, are noteasytowriteandarebestchecked usingpatternrecognitionmethods. AssuraPhysicalVerificationincorporates uniquepatterncheckingcapabilitiesto accelerateadvancedruledevelopment andmaintenanceforchecksthatwould bedifficulttowriteusingtraditional approaches. Thisapproachcanprovide upto20xperformanceimprovement foradvancedchecks, whichinturncan improvetheoverallrun-timefortheentire DRCtaskbyupto2x.
3 2 1
Figure 2. Sample context-dependent fill recipe: rectangular fill (1) under bond pad, grounded multi-layer custom fill (2) pattern in empty areas, skewed square fill (3) under power lines.
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ASSURAPHYSICALVERIFICATION
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· Fasterrorcorrectionusingedit-in-place ordescendmodeswithinVirtuoso LayoutEditor · Accesslayoutdatainedit-orread-only modes · Hierarchicalerrorreportingandcrossprobingforblocks, cells, devices, nets, andpins · Showerrorsbyruletypeorbylayout cell · Immediateerrorandwarningmessages duringinteractivesessionsviacommand interpreterwindow(CIW) · PerformXORcomparisonbetweentwo databases · Supportsign-offorfalseerrormarker exceptionhandling · WindowDRCoperationallowsfast localizedchecking, especiallyuseful duringchipassemblyorforlastminute editstoreduceredundantcheckingand runtimes · Time-to-errorcapability · IntegrationwithQuickViewtoopen anddebuglargedesigns · Abilitytoviewinterimlayers(forrule deckdevelopers)
Figure 3. [. . . ] All others are properties of their respective holders. [. . . ]
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