Page 1EL/CCUT T.-C. Huang Dec. 2003 TCH CCUT Introduction to IC Design Tsung-Chu Huang ( 黃宗柱 ) Department of Electronic Eng. Chong Chou Institute of Tech

Page 1EL/CCUT T.-C. Huang Dec. 2003

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Introduction to IC DesignIntroduction to IC Design

Tsung-Chu Huang( 黃宗柱 )

Department of Electronic Eng.Chong Chou Institute of Tech.

Email: [email protected]

2003/12/01


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I/O Structures

1. Bonding 2. ESD3. I/O Pad4. Power Pads5. Guard Ring, Quiet Ring6. Tristate and Bidirectional Pads


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Packages


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Bonding

Passivation/overglass

PadUltrasonic Beam100


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Pad Building

Metal-Upmost

Metal_Underlayer

N-Well

Via


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ESDElectrostatic Discharge

1. Usually, discharging time ~ 100ns2. Input resistance ~ 1K for common ICs.3. Test Bench:

Class 1

Class 2Class 2

Class 3

Class 4

1kV 2kV 4kV 8kV 16kV 32kV 64kV

4. ESD Classification:

CUT

1.5k

100p


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Thinox Puncture and Drain Breakdown

~ 100V

1210


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Typical ESD Protection

I

V~ 40V


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Diode Clamper and Protecting Resistor

-40 < V < +40

Poly-resistor

p-Diff resistor

Be careful of RC for Hi-speed!


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PAD vs. Core

Core-Limited Core

Pad-Liimited


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Connection between PADs

1. Butting2. Feed-through3. Wired

CoreCorner pads


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Rings around the CoresGuard Rings

Pad-Power Rings

Core-Power Rings

Quiet Rings

Dirty Rings

Clean Rings

Usually lowest outer

Diffusion Rings

CoreSensitive

Core

User Rings


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Miscellaneous Pads 1. Power Pads: Noise Prevention, Separation2. Input Pads: Level-Shifting, Input Protection3. Output Pads: Drive, Latch-up Prevention4. Clock Pads: RC Reduction5. Heat-sink Pads: (connected to) Heat Sink6. Stand Pads: (e.g., LCD display)7. Scan Pads: with Boundary Scan Cell8. Virtual-Ground Pads: with SLEEP Transistor9. Register Pads: to reduce tCQ, tDC

10.Schmitt-Trigger Pads11.Pull-Up/Down Pads12.Analog/Digital Pads13.Dirty/Clean Pads


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Latch-up Effect in n-Well ProcessIN

OUTVdd

Vss

Latch up ! 正回授鎖死而燒毀 !


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Guard Rings1. Noise Reduction2. Latch-up prevention especially for Output (Hi-I) Pad

s3. To guard deeply (under thinox), Diffusion Rings are

usually used.4. For diffusion rings, Poly-crossovers are inhibited.


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Doubly Guard Rings


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Pad-Limited Pads

core


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Core-Limited Pads

core


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TTL Input PAD

IN OUT

VDD

VSS

VDD

IN OUT

VSS

1:6

Wide


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A Tri-state/Bidirectional Pad

Dout

OE

Din


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Sleep Transistor in Pads

VSS I/O


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Boundary Scan Cell in I/O Pad

outS

0

1

D QD Q

0

1

inS

D

ClkDR UpdateDRModeShiftDR

outS

0

1

D QD Q

0

1

inS

D

ClkDR UpdateDRModeShiftDR


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Homework #2


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Homework #2


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Homework #31. Applying an account to use Cadence/Virtuoso2. Select or design a circuit with about 2~10 transistors

1. Inverter,2. Transmission gate,3. D-Latch4. NAND2, NOR2, etc.

3. Draw the Schematics4. Transistor sizing and Pre-layout simulation5. Layout using Virtuoso, Laker or L-Edit6. DRC, LVS (Dracula or Calibre, at least Diva)7. Extract to a SPICE file8. Post-layout simulation on the typical function of your

circuit.

Due to the final-exam day (no postponement).

A tutorial can be download from my instruction web.


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Simple Tutorial and Tips about HW#3

1. X-Windows

2. Solaris/UNIX

3. Design Flow


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X-Window1. X-Windows Tools

1. eXceed

2. Xdemo

3. Xwin32

2. Graphic-Base Exchange Protocol

3. 1990 X11

4. Present Unix/Solaris facilities X-windowDaemon ；

5. For PC/Windows, X-window Client Package should be installed.


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Typical Configuration of Xwindow

Usually, Daemon xdm has Installed

set DISPLAY 163.23.247.178:0.0

who

Run Xwindow client

telnet 163.23.247.191

winipcfg

163.23.247.191cad1.el.ccut.edu.tw

163.23.247.178


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Daemon xdm Protocol

Typical Configuration of Xwindow


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Login Shell as a Window in Windows

Press User name and Password


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OpenWindows

(1) 右鍵出現選單

(2) 由 Tools 選擇 Terminal

(3) 有 4 個桌面可以用(4) 最後按 EXIT 離開


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Typical (Suggested) File/Folder Allocation

~

bin TSMC035 tmp

tf workcheck

035.tfdivaDRC.ruldivaLVS.ruldivaLPE.rul

drclvslpe

display.drf

cds.lib

$home

離線 Pdracula的檢查規則

線上 Diva的檢查規則

色盤設定

CDS 資料庫

0.35um 技術檔


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Utilizing script and alias

1. 常要設定 setenv DISPLAY (IP):0.0

2. 可以用 alias 替代指令被替代的指令串3. 例如： alias d ‘setenv DISPLAY !*\:0.0’

4. 在 ~/.cshrc 設定，則 login 後只要 d (IP)即可

5. more ~tch/.cshrc

6. cp ~tch/.cshrc ~

7. source cds_0006.cshrc

8. icfb &


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CIW: Command Interpretation Window

Exit from Cadence by CIW→FILE→Exit as possible!

Be careful of the error message frequently.

CIW

File

Tools Library manager

Exit

Open

New

New

Library

Cell view

Documents

Page 1EL/CCUT T.-C. Huang Dec. 2003 TCH CCUT Introduction to IC Design Tsung-Chu Huang ( 黃宗柱 ) Department of Electronic Eng. Chong Chou Institute of Tech