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VLSI Design Full-custom IC Design Flow

VLSI Design Full-custom IC Design Flow. Introduction to VLSI Circuits and Systems 積體電路概論. 賴秉樑 Dept. of Electronic Engineering National Chin-Yi University of Technology Fall 2007. Outline. Schematic with Composer of ICFB (Cadence) Pre-simulation using Hspice

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VLSI Design Full-custom IC Design Flow

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  1. VLSI DesignFull-custom IC Design Flow Introduction to VLSI Circuits and Systems積體電路概論 賴秉樑 Dept. of Electronic Engineering National Chin-Yi University of Technology Fall 2007

  2. Outline • Schematic with Composer of ICFB (Cadence) • Pre-simulation using Hspice • Layout with Virtuoso or Laker • Verification using Calibre or Dracula • DRC • LVS • PEX • Post-simulation using Hspice

  3. Custom IC Design We offer the technology files of the following, and copy it to your home directory

  4. Environment • Operation System: Solaris 8 (Sun Blade 2500) • Account is personal student’s identity number, ex. g955168 • Using X-win32 or ReflectionX to remote WorkStation

  5. Console 登入的Shell is C-shell 1. 目前source license的軟體 家目錄 2. 可修改於home dir/.cshrc

  6. Schematic with Composer

  7. ICFB • Under home directory  Mkdir work_tsmc035 (自設一個工作目錄) • Under work_tsmc035 directory→ icfb & Under your design directory Cadence 的ICFB控制視窗

  8. Merge Display File to Virtuoso • 加入後 Schematic & Layout view 才能正常顯示顏色與圖層 • Key Step: Tools  Display Resource Manger… (1) ../technology/display.drf (2) Add (3) ./work_tsmc035/display.drf

  9. 建立新的製程 Library • 不同的製程需新建不同製程技術的library • Step 1: Select File  New  Library • Step 2: Name  tsmc035_techfile (user-define) • Step 3: ASCII Technology File  ../technology/035ms.tf Step 1 Step 2 Step 3

  10. 建立新的 Design Library • Step 4: Select File  New  Library • Step 5: Name  basic_logic (usr-define) • Step 6: Technology Library  tsmc035_techfile Step 4 Step 6 Step 5

  11. Create a Cellview under Design Library • 建立一個cell  inv (inverter) • Step 7: Select File  New  Cellview

  12. Step 8: 呼叫 analogLib 建立基本的instance PMOS: pmos4 NMOS: nmos4 加入 instance (hot key ‘i’)

  13. 加入 input and output (hot key ‘p’) 完成inverter設計 (pmos, nmos, vdd, gnd and wire-connection)

  14. Generating Netlist using CDL • Step 9: File  Export  CDL Netlist 的副檔名為 name.sp

  15. Modify the inv.sp and Create a another inv_sim.sp Delete NM  NCH PM  PCH

  16. Pre-sim. using Hspice • 進行 Hspice 時，netlist 與 Spice Model file mm0355v.l要在同一個目錄下 • Console  soclab02% hspice inv_sim.sp 路徑要注意!

  17. 確定 hspice job concluded  soclab02% awaves & • Step 10: Open Step 10 Ctrl+a 可將波形視窗分割

  18. 觀察inverter的input & output 電壓

  19. Waveform with Awaves **檢查Pre-sim. 的結果與功能正常後才進行layout**

  20. Layout with Virtuoso Editor

  21. Layout with Virtuoso Editor • Step 1: Link Calibre into Virtuoso (load(“/usr/mentor/Calibre_ss/cur/lib/calibre.skl”) • Step 2: File  New  Cellview Under the same library and cell name Step 1 Step 2 Select Virtuoso, and View Name is layout

  22. Virtuoso Layout Window Make sure linking Calibre success! LSW: 供可選擇之layer，如無法正常顯示顏色，請重做Display resource manger (Merge display.drf)

  23. N-Well COMS Inverter The cross-section view and layout of a CMOS(n-well) inverter

  24. TSMC035 Minimum Design Rule with COMS Inverter

  25. Minimum NIMP extension of N+ Diffusion 0.25 um Minimum N-Well width 1.7 um Minimum Metal1 extension of Contact 0.15 um Minimum POLY1 extension of Diffusion 0.4 um Contact size 0.4 * 0.4 um Minimum Contact to Contact spacing 0.4 um Minimum N-Well extension of P+ Diffusion 1.2 um Minimum Diffusion extension of Contact is 0.15 um Minimum Metal1 width 0.5 um Minimum clearance from Contact on Diffusion region to a Poly gate 0.3 um Minimum Diffusion width 0.3 um Minimum PIMP extension of P+ Diffusion 0.25 um Minimum Poly1 width 0.35 um

  26. An Inverter Layout

  27. Layout Verification with Calibre DRC/LVS/PEX

  28. Calibre DRC (5/1) • Step 1: File  Export  Stream 須先轉成Layout的GDSII的格式 Step 1

  29. Calibre DRC (2/5) • Step 2: Calibre  Run DRC Calibre DRC window

  30. Calibre DRC (3/5) • Step 3: Rules  將TSMC035的calibre DRC rules file加入

  31. Calibre DRC (4/5) • Step 4:Inputs  Layout  Files  inv.gds (路徑要注意) 可直接由layout view來執行，但電路假如很大，則需較久時間，一般disalbe

  32. Calibre DRC (5/5) • Step 5:Run DRC No error! 但可忽略的design rule error 可查閱　“可允許之DRC錯誤-假錯-申請者常犯錯誤”

  33. Calibre LVS (1/6) • Step 1:修改inv.sp檔局部的netlist成LVS可過的形式

  34. Calibre LVS (2/6) • Step 2: Calibre  Run LVS

  35. Calibre LVS (3/5) • Step 3: Rules  將TSMC035的calibre LVS rules file加入

  36. Calibre LVS (4/6) • Step 4:Inputs  Layout  Files  inv.gds (路徑要注意)

  37. Calibre LVS (5/6) • Step 4:Inputs  Netlist  Files  inv.sp (路徑要注意) 可直接由schematic view來執行，但電路假如很大，則需較久時間，一般disalbe

  38. Calibre LVS (6/6)

  39. Calibre PEX (1/8) • Step 1:修改inv.sp檔局部的netlist成PEX可過的形式

  40. Calibre PEX (2/8)

  41. Calibre PEX (3/8)

  42. Calibre PEX (4/8)

  43. Calibre PEX (5/8)

  44. Calibre PEX (6/8)

  45. Calibre PEX (7/8) 進行RC值萃取

  46. Calibre PEX (8/8)

  47. Modify inv_pex.sp inv_pex.sp.inv.pxi & inv_pex.sp.pex為存放PEX萃取出後的RC參數值

  48. inv_pex.sp.inv.pxi & inv_pex.sp.pex為存放PEX萃取出後的RC參數值

  49. Post-simulation Result

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