tutorial1

• If there is design rule violation, the errors encountered and the total number of errors will be appeared on the Command Interpreter Window.
Design Rule Check
Design Rule Check
• On the Layout Editor, the layer encounters design rule violation will be covered by a „Maker‟ layer. Choose “Verify Markers Explain” and click on the „Maker‟ layer to check out the violated design rule. The error messages will be appeared on the “marker text window”.
Tutorial 1 (Cadence)
Installation of Cadence
• 1. Download the file named “cds97a.env” from the homepage into your root directory. • 2. In the file .cshrc, add the code “source cds97a.env”. • 3. Source the .cshrc at the first time of installation. • 4. Make a working directory e.g. mkdir ele5260
• Type “capall” on the Switch Names or you can select it from the “Set Switches” item.
Parameter Extraction
• In the extraction process, the errors encountered and the total number of errors will be appeared on the Command Interpreter Window.
For schematic capture The Cell Name is defined by the user
For symbol generation
For layout design (used in hw1)
Creating new Cell View
A window called “Create New File” will be appeared. You can define the name of the new Cell e.g. inverter. The option “View Name” is target specific, for example if you want to do a layout design, you have to choose “Virtuoso” and the View Name will be automatically set to “layout”
• Open windows • Start tools • View prompts, error messages, and informational messages • Make changes to your working environment • Quit your design session
Starting with Cadence
• In your working directory, type “icfb &” to run Cadence. • A Command Interpreter Window (CIW) will be loaded.
Command Integreter Window (CIW)
Design Rule Check
• We can extract all the parasitic capacitance from the layout. Choose “Verify Extract” to extract the parasitic capacitance.
Parameter Extraction
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Library 3
Cell 1
Cell 1
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Cell 1
Schematic
Layout
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Symbol
• On the Library Manager, choose “File New Library…” to create a Library
Creating new Library
Layout Editor
• 5. Misc Ruler/clear Rulers (k/K) measure dimension • 6. Edit Move (m) Move the object • 7. Edit Copy (c) Copy the object • 8. Edit Stretch (s) Stretch and change the dimension of the layer • 9. Edit Delete (del) Delete the object
A window called “New Library” will be appeared. You can define the nating new Library
Creating new Library
After you have defined the name, you have to choose the technology file you want to use. In this homework, you have to use the existing technology file “TECH_CUP”
Layer and selection window LSW
• • • • • • • • Common layers used: 1. NTUB (dg) + FIMP (dg) N-Well 2. DIFF (dg) Active area 3. PPLUS (dg) P+ implant 4. NPLUS (dg) N+ implant 5. POLY1 (dg) Polysilicon 6. MET1 (dg) Metal 1 7. CONT (dg) Contact
Design Rule Check
• If there is no design rule violation, a message “Total errors found: 0” will be appeared on the Command Interpreter Window.
Design Rule Check
Layout Editor
• Common command used (pull down menu): • 1. Design Save(F2) Save the design • 2. Window Zoom in/out by 2 (Ctrl + z/Shift + z) zoom • 3. Create Rectangle (r) create rectangular shape layer • 4. Edit Undo/Redo (u/U) undo/redo process
• On the CIW, choose “Tools Library Manager...” to open the Library Manager
Library Manager
Structure of Library Manager
Working directory
Library 1
Library 2
Installation of Cadence conv.
• Download the file named “display.drf” from the homepage into your working directory. • In your working directory, type the following path “/export_sun6/ams_v3.12/artist/bin/ams_cds -newtech -tech cup -tool artist” • Choose “File Exit” to quit the cadence • installation complete
Parameter Extraction
• On the Library Manager, a new cell view called “extracted” is created. Double click the extracted view to open the extracted layout.
Layout Editing
DIFF(dg)
ruler
Shortcut for ruler
Shortcut for create rectangle
Procedure for Layout Editing
• Select the appropriate layout on the LSW • Click the shortcut button of “ruler” or select the “ruler” from the pull down menu • define the dimension of the layer on the layout editor • Click the shortcut button of “create rectangle” or select it from the pull down menu • Create the rectangle on the layout editor