SlideShare a Scribd company logo
Short Channel Effect
in MOSFET
Arpan Deyasi
Dept of ECE, RCCIIT, Kolkata, India
1/17/2021 1Arpan Deyasi, RCCIIT, India
Q. What is meant by short-channel?
Leff≃(zD+zS)
Leff
zDzS
Dielectric
1/17/2021 2Arpan Deyasi, RCCIIT, India
DrainSource
Channel
1/17/2021 3Arpan Deyasi, RCCIIT, India
I. Electric field tends to increase because of improper
scaling of source potential
II. Built-in potential is neither negligible nor scalable
III. Vertical depth of source/drain junctions can’t be reduced
IV. Mobility decreases with increase of substrate doping
V. Subthreshold slope is not scalable
Why small geometry effects arise?
1/17/2021 4Arpan Deyasi, RCCIIT, India
Short-channel effects in MOSFET
1. Hot electron effect
2. Dielectric breakdown
3. Output impedance variation
4. Mobility degradation
5. Threshold voltage shift
1/17/2021 Arpan Deyasi, RCCIIT, India 5
A few related
physical phenomena
1/17/2021 6Arpan Deyasi, RCCIIT, India
Hot electron
Coldelectron
Warmelectron
Hotelectron
3 3
2 2
B L B ek T k T>>
3 3
2 2
B L B ek T k T≈
3 3
2 2
B L B ek T k T<<
E
v
1/17/2021 Arpan Deyasi, RCCIIT, India 7
Drain-Induced Barrier Lowering
1/17/2021 Arpan Deyasi, RCCIIT, India 8
Surface Scattering
1/17/2021 Arpan Deyasi, RCCIIT, India 9
Channel Length Modulation
1/17/2021 Arpan Deyasi, RCCIIT, India 10
Impact Ionization
1/17/2021 Arpan Deyasi, RCCIIT, India 11
Effects of
Short-Channel Geometry
1/17/2021 12Arpan Deyasi, RCCIIT, India
Hot electron effect
Substrate (p)
S (n+) D (n+)
Gate
Channel
Dielectric
1/17/2021 13Arpan Deyasi, RCCIIT, India
Dielectric Breakdown
Substrate (p)
S (n+) D (n+)
Gate
Channel
Dielectric
1/17/2021 14Arpan Deyasi, RCCIIT, India
Output Impedance Variation
CLM+DIBL
VDS
Z0
DIBL
1/17/2021 15Arpan Deyasi, RCCIIT, India
Mobility Degradation
1/17/2021 16Arpan Deyasi, RCCIIT, India
Mobility Degradation
0
1
1 ( )
surf
GS ThV V
µ µ
θ
=
+ −
μ0: mobility at threshold voltage
θ: mobility reduction factor
1/17/2021 17Arpan Deyasi, RCCIIT, India
Threshold Voltage Variation
Dielectric
S D
Gate
zSm zDm
ΔLS ΔLD
zj
zj
1/17/2021 18Arpan Deyasi, RCCIIT, India
ΔLS: lateral extent of depletion region in source
ΔLD: lateral extent of depletion region in drain
zS: depth of depletion region in source
zD: depth of depletion region in drain
zSm: vertical extent of bulk depilation region in source
zDm: vertical extent of bulk depilation region in drain
Threshold Voltage Variation
1/17/2021 Arpan Deyasi, RCCIIT, India 19
22 2
( ) ( )j D Dm j Dz z z z L+ = + + ∆
Threshold Voltage Variation
2
2 2
2
0
2
D j D
Dm D j D
L z L
z z z z
 ∆ + + ∆
  =
 + − − 
1/17/2021 Arpan Deyasi, RCCIIT, India 20
Threshold Voltage Variation
2 2 2
( ( ) 2 )
D j
j D D j Dm
L z
z z z z z
∆ =− +
− − +
1 2 1D
D j
j
z
L z
z
 
∆ + − 
  

1/17/2021 Arpan Deyasi, RCCIIT, India 21
Threshold Voltage Variation
Similarly,
1 2 1S
S j
j
z
L z
z
 
∆ + − 
  

1/17/2021 Arpan Deyasi, RCCIIT, India 22
where
Threshold Voltage Variation
2
( )D DS F
A
z V
qN
ε
φ
 
= + 
 
2
S F
A
z
qN
ε
φ
 
=  
 
1/17/2021 Arpan Deyasi, RCCIIT, India 23
( )TO short channel TO TOV V V− = − ∆
Threshold Voltage Variation
VTO: zero-bias threshold voltage
ΔVTO: threshold voltage shift
1/17/2021 Arpan Deyasi, RCCIIT, India 24
Threshold Voltage Variation
1
2 2
2
S D
TO A F
D
L L
V qN
C L
ε φ
∆ + ∆
∆ =−
2 2
2
1 2 1 1 2 1
j
TO A F
D
SD
j j
z
V qN
C L
zz
z z
ε φ∆ =− ×
    
 + − + + −   
        

More Related Content

What's hot

Finfet
FinfetFinfet
Finfet
Aditya Singh
 
Digital VLSI Design : Combinational Circuit
Digital VLSI Design : Combinational CircuitDigital VLSI Design : Combinational Circuit
Digital VLSI Design : Combinational Circuit
Usha Mehta
 
Finfet Technology
Finfet TechnologyFinfet Technology
Finfet Technology
Srinivas Vasamsetti
 
Rc delay modelling in vlsi
Rc delay modelling in vlsiRc delay modelling in vlsi
Rc delay modelling in vlsi
Dr. Vishal Sharma
 
Leakage effects in mos-fets
Leakage effects in mos-fetsLeakage effects in mos-fets
Leakage effects in mos-fets
Arya Ls
 
Pass Transistor Logic
Pass Transistor LogicPass Transistor Logic
Pass Transistor Logic
Diwaker Pant
 
Optoelectronics seminar: MESFET
Optoelectronics seminar: MESFETOptoelectronics seminar: MESFET
Optoelectronics seminar: MESFET
Mridula Sharma
 
Mosfet
MosfetMosfet
Mosfet
Pooja Shukla
 
Cmos
CmosCmos
PHYSICS OF SEMICONDUCTOR DEVICES
PHYSICS OF SEMICONDUCTOR DEVICESPHYSICS OF SEMICONDUCTOR DEVICES
PHYSICS OF SEMICONDUCTOR DEVICES
Vaishnavi Bathina
 
GAA nano wire FET
GAA nano wire FETGAA nano wire FET
GAA nano wire FET
Jaidev Kaushik
 
Vlsi design notes
Vlsi design notesVlsi design notes
Vlsi design notes
Venkat Malai Avichi
 
Finfet; My 3rd PPT in clg
Finfet; My 3rd PPT in clgFinfet; My 3rd PPT in clg
Finfet; My 3rd PPT in clg
ARUNASUJITHA
 
High Electron Mobility Transistor
High Electron Mobility TransistorHigh Electron Mobility Transistor
High Electron Mobility Transistor
RCC Institute of Information Technology
 
Analog Layout design
Analog Layout design Analog Layout design
Analog Layout design
slpinjare
 
Lightly Doped Drain
Lightly Doped DrainLightly Doped Drain
Lightly Doped Drain
Sudhanshu Janwadkar
 
Latch up
Latch upLatch up
Latch up
ishan111
 
Layout02 (1)
Layout02 (1)Layout02 (1)
Layout02 (1)
venkat1234_nxp
 
Single Electron Transistor
Single Electron TransistorSingle Electron Transistor
Single Electron Transistor
RCC Institute of Information Technology
 
Introduction to FINFET, Details of FinFET
Introduction to FINFET, Details of FinFETIntroduction to FINFET, Details of FinFET
Introduction to FINFET, Details of FinFET
Justin George
 

What's hot (20)

Finfet
FinfetFinfet
Finfet
 
Digital VLSI Design : Combinational Circuit
Digital VLSI Design : Combinational CircuitDigital VLSI Design : Combinational Circuit
Digital VLSI Design : Combinational Circuit
 
Finfet Technology
Finfet TechnologyFinfet Technology
Finfet Technology
 
Rc delay modelling in vlsi
Rc delay modelling in vlsiRc delay modelling in vlsi
Rc delay modelling in vlsi
 
Leakage effects in mos-fets
Leakage effects in mos-fetsLeakage effects in mos-fets
Leakage effects in mos-fets
 
Pass Transistor Logic
Pass Transistor LogicPass Transistor Logic
Pass Transistor Logic
 
Optoelectronics seminar: MESFET
Optoelectronics seminar: MESFETOptoelectronics seminar: MESFET
Optoelectronics seminar: MESFET
 
Mosfet
MosfetMosfet
Mosfet
 
Cmos
CmosCmos
Cmos
 
PHYSICS OF SEMICONDUCTOR DEVICES
PHYSICS OF SEMICONDUCTOR DEVICESPHYSICS OF SEMICONDUCTOR DEVICES
PHYSICS OF SEMICONDUCTOR DEVICES
 
GAA nano wire FET
GAA nano wire FETGAA nano wire FET
GAA nano wire FET
 
Vlsi design notes
Vlsi design notesVlsi design notes
Vlsi design notes
 
Finfet; My 3rd PPT in clg
Finfet; My 3rd PPT in clgFinfet; My 3rd PPT in clg
Finfet; My 3rd PPT in clg
 
High Electron Mobility Transistor
High Electron Mobility TransistorHigh Electron Mobility Transistor
High Electron Mobility Transistor
 
Analog Layout design
Analog Layout design Analog Layout design
Analog Layout design
 
Lightly Doped Drain
Lightly Doped DrainLightly Doped Drain
Lightly Doped Drain
 
Latch up
Latch upLatch up
Latch up
 
Layout02 (1)
Layout02 (1)Layout02 (1)
Layout02 (1)
 
Single Electron Transistor
Single Electron TransistorSingle Electron Transistor
Single Electron Transistor
 
Introduction to FINFET, Details of FinFET
Introduction to FINFET, Details of FinFETIntroduction to FINFET, Details of FinFET
Introduction to FINFET, Details of FinFET
 

Similar to Short-Channel Effects in MOSFET

JFET
JFETJFET
Absorption coefficient of quantum well structure
Absorption coefficient of quantum well structure Absorption coefficient of quantum well structure
Absorption coefficient of quantum well structure
RCC Institute of Information Technology
 
Electrical characteristics of MOSFET
Electrical characteristics of MOSFETElectrical characteristics of MOSFET
Electrical characteristics of MOSFET
RCC Institute of Information Technology
 
DoS of bulk and quantum structures
DoS of bulk and quantum structuresDoS of bulk and quantum structures
DoS of bulk and quantum structures
RCC Institute of Information Technology
 
Semiconductor laser
Semiconductor laserSemiconductor laser
absorption coefficient in bulk and quantum well structure
absorption coefficient in bulk and quantum well structureabsorption coefficient in bulk and quantum well structure
absorption coefficient in bulk and quantum well structure
RCC Institute of Information Technology
 
Transit time device
Transit time deviceTransit time device
Band nonparabolicity effect on eigenstates
Band nonparabolicity effect on eigenstatesBand nonparabolicity effect on eigenstates
Band nonparabolicity effect on eigenstates
RCC Institute of Information Technology
 
Rec101 unit ii (part 3) field effect transistor
Rec101 unit ii (part 3) field effect transistorRec101 unit ii (part 3) field effect transistor
Rec101 unit ii (part 3) field effect transistor
Dr Naim R Kidwai
 
Gunn diode
Gunn diodeGunn diode
MESFET
MESFETMESFET
Drc 2010 D.J.Pawlik
Drc 2010 D.J.PawlikDrc 2010 D.J.Pawlik
Drc 2010 D.J.Pawlik
slrommel
 
Gain parameters of BJT
Gain parameters of BJTGain parameters of BJT
Electrical properties of p-n junction
Electrical properties of p-n junctionElectrical properties of p-n junction
Electrical properties of p-n junction
RCC Institute of Information Technology
 
Metal-Semiconductor Contact
Metal-Semiconductor ContactMetal-Semiconductor Contact
Metal-Semiconductor Contact
RCC Institute of Information Technology
 
Field Effect Transistor (FET)
Field Effect Transistor (FET)Field Effect Transistor (FET)
Field Effect Transistor (FET)
Jess Rangcasajo
 
Field Effect Transistor
Field Effect TransistorField Effect Transistor
Field Effect Transistor
Jess Rangcasajo
 
Hybrid Parameter in BJT
Hybrid Parameter in BJTHybrid Parameter in BJT
Semiconductor diodes
Semiconductor diodesSemiconductor diodes
Semiconductor diodes
Sirat Mahmood
 
Distortionless Transmission Line
Distortionless Transmission LineDistortionless Transmission Line
Distortionless Transmission Line
RCC Institute of Information Technology
 

Similar to Short-Channel Effects in MOSFET (20)

JFET
JFETJFET
JFET
 
Absorption coefficient of quantum well structure
Absorption coefficient of quantum well structure Absorption coefficient of quantum well structure
Absorption coefficient of quantum well structure
 
Electrical characteristics of MOSFET
Electrical characteristics of MOSFETElectrical characteristics of MOSFET
Electrical characteristics of MOSFET
 
DoS of bulk and quantum structures
DoS of bulk and quantum structuresDoS of bulk and quantum structures
DoS of bulk and quantum structures
 
Semiconductor laser
Semiconductor laserSemiconductor laser
Semiconductor laser
 
absorption coefficient in bulk and quantum well structure
absorption coefficient in bulk and quantum well structureabsorption coefficient in bulk and quantum well structure
absorption coefficient in bulk and quantum well structure
 
Transit time device
Transit time deviceTransit time device
Transit time device
 
Band nonparabolicity effect on eigenstates
Band nonparabolicity effect on eigenstatesBand nonparabolicity effect on eigenstates
Band nonparabolicity effect on eigenstates
 
Rec101 unit ii (part 3) field effect transistor
Rec101 unit ii (part 3) field effect transistorRec101 unit ii (part 3) field effect transistor
Rec101 unit ii (part 3) field effect transistor
 
Gunn diode
Gunn diodeGunn diode
Gunn diode
 
MESFET
MESFETMESFET
MESFET
 
Drc 2010 D.J.Pawlik
Drc 2010 D.J.PawlikDrc 2010 D.J.Pawlik
Drc 2010 D.J.Pawlik
 
Gain parameters of BJT
Gain parameters of BJTGain parameters of BJT
Gain parameters of BJT
 
Electrical properties of p-n junction
Electrical properties of p-n junctionElectrical properties of p-n junction
Electrical properties of p-n junction
 
Metal-Semiconductor Contact
Metal-Semiconductor ContactMetal-Semiconductor Contact
Metal-Semiconductor Contact
 
Field Effect Transistor (FET)
Field Effect Transistor (FET)Field Effect Transistor (FET)
Field Effect Transistor (FET)
 
Field Effect Transistor
Field Effect TransistorField Effect Transistor
Field Effect Transistor
 
Hybrid Parameter in BJT
Hybrid Parameter in BJTHybrid Parameter in BJT
Hybrid Parameter in BJT
 
Semiconductor diodes
Semiconductor diodesSemiconductor diodes
Semiconductor diodes
 
Distortionless Transmission Line
Distortionless Transmission LineDistortionless Transmission Line
Distortionless Transmission Line
 

More from RCC Institute of Information Technology

Scaling in conventional MOSFET for constant electric field and constant voltage
Scaling in conventional MOSFET for constant electric field and constant voltageScaling in conventional MOSFET for constant electric field and constant voltage
Scaling in conventional MOSFET for constant electric field and constant voltage
RCC Institute of Information Technology
 
Carrier scattering and ballistic transport
Carrier scattering and ballistic transportCarrier scattering and ballistic transport
Carrier scattering and ballistic transport
RCC Institute of Information Technology
 
Electromagnetic Wave Propagations
Electromagnetic Wave PropagationsElectromagnetic Wave Propagations
Electromagnetic Wave Propagations
RCC Institute of Information Technology
 
Biot-Savart law
Biot-Savart lawBiot-Savart law
Ampere's circuital law
Ampere's circuital lawAmpere's circuital law
Magnetic Potentials
Magnetic PotentialsMagnetic Potentials
Reflection and Transmission coefficients in transmission line
Reflection and Transmission coefficients in transmission lineReflection and Transmission coefficients in transmission line
Reflection and Transmission coefficients in transmission line
RCC Institute of Information Technology
 
Impedance in transmission line
Impedance in transmission lineImpedance in transmission line
Impedance in transmission line
RCC Institute of Information Technology
 
Quantum Hall Effect
Quantum Hall EffectQuantum Hall Effect
Telegrapher's Equation
Telegrapher's EquationTelegrapher's Equation
Dielectrics
DielectricsDielectrics
Capacitor
CapacitorCapacitor
Electrical Properties of Dipole
Electrical Properties of DipoleElectrical Properties of Dipole
Electrical Properties of Dipole
RCC Institute of Information Technology
 
Application of Gauss' Law
Application of Gauss' LawApplication of Gauss' Law
Application of Gauss' Law
RCC Institute of Information Technology
 
Fundamentals of Gauss' Law
Fundamentals of Gauss' LawFundamentals of Gauss' Law
Fundamentals of Gauss' Law
RCC Institute of Information Technology
 
Fundamentals of Coulomb's Law
Fundamentals of Coulomb's LawFundamentals of Coulomb's Law
Fundamentals of Coulomb's Law
RCC Institute of Information Technology
 
Vector Integration
Vector IntegrationVector Integration
Scalar and vector differentiation
Scalar and vector differentiationScalar and vector differentiation
Scalar and vector differentiation
RCC Institute of Information Technology
 
Coordinate transformation
Coordinate transformationCoordinate transformation
Coordinate transformation
RCC Institute of Information Technology
 
Moletronics
MoletronicsMoletronics

More from RCC Institute of Information Technology (20)

Scaling in conventional MOSFET for constant electric field and constant voltage
Scaling in conventional MOSFET for constant electric field and constant voltageScaling in conventional MOSFET for constant electric field and constant voltage
Scaling in conventional MOSFET for constant electric field and constant voltage
 
Carrier scattering and ballistic transport
Carrier scattering and ballistic transportCarrier scattering and ballistic transport
Carrier scattering and ballistic transport
 
Electromagnetic Wave Propagations
Electromagnetic Wave PropagationsElectromagnetic Wave Propagations
Electromagnetic Wave Propagations
 
Biot-Savart law
Biot-Savart lawBiot-Savart law
Biot-Savart law
 
Ampere's circuital law
Ampere's circuital lawAmpere's circuital law
Ampere's circuital law
 
Magnetic Potentials
Magnetic PotentialsMagnetic Potentials
Magnetic Potentials
 
Reflection and Transmission coefficients in transmission line
Reflection and Transmission coefficients in transmission lineReflection and Transmission coefficients in transmission line
Reflection and Transmission coefficients in transmission line
 
Impedance in transmission line
Impedance in transmission lineImpedance in transmission line
Impedance in transmission line
 
Quantum Hall Effect
Quantum Hall EffectQuantum Hall Effect
Quantum Hall Effect
 
Telegrapher's Equation
Telegrapher's EquationTelegrapher's Equation
Telegrapher's Equation
 
Dielectrics
DielectricsDielectrics
Dielectrics
 
Capacitor
CapacitorCapacitor
Capacitor
 
Electrical Properties of Dipole
Electrical Properties of DipoleElectrical Properties of Dipole
Electrical Properties of Dipole
 
Application of Gauss' Law
Application of Gauss' LawApplication of Gauss' Law
Application of Gauss' Law
 
Fundamentals of Gauss' Law
Fundamentals of Gauss' LawFundamentals of Gauss' Law
Fundamentals of Gauss' Law
 
Fundamentals of Coulomb's Law
Fundamentals of Coulomb's LawFundamentals of Coulomb's Law
Fundamentals of Coulomb's Law
 
Vector Integration
Vector IntegrationVector Integration
Vector Integration
 
Scalar and vector differentiation
Scalar and vector differentiationScalar and vector differentiation
Scalar and vector differentiation
 
Coordinate transformation
Coordinate transformationCoordinate transformation
Coordinate transformation
 
Moletronics
MoletronicsMoletronics
Moletronics
 

Recently uploaded

一比一原版(uofo毕业证书)美国俄勒冈大学毕业证如何办理
一比一原版(uofo毕业证书)美国俄勒冈大学毕业证如何办理一比一原版(uofo毕业证书)美国俄勒冈大学毕业证如何办理
一比一原版(uofo毕业证书)美国俄勒冈大学毕业证如何办理
upoux
 
一比一原版(USF毕业证)旧金山大学毕业证如何办理
一比一原版(USF毕业证)旧金山大学毕业证如何办理一比一原版(USF毕业证)旧金山大学毕业证如何办理
一比一原版(USF毕业证)旧金山大学毕业证如何办理
uqyfuc
 
Tools & Techniques for Commissioning and Maintaining PV Systems W-Animations ...
Tools & Techniques for Commissioning and Maintaining PV Systems W-Animations ...Tools & Techniques for Commissioning and Maintaining PV Systems W-Animations ...
Tools & Techniques for Commissioning and Maintaining PV Systems W-Animations ...
Transcat
 
一比一原版(uoft毕业证书)加拿大多伦多大学毕业证如何办理
一比一原版(uoft毕业证书)加拿大多伦多大学毕业证如何办理一比一原版(uoft毕业证书)加拿大多伦多大学毕业证如何办理
一比一原版(uoft毕业证书)加拿大多伦多大学毕业证如何办理
sydezfe
 
Null Bangalore | Pentesters Approach to AWS IAM
Null Bangalore | Pentesters Approach to AWS IAMNull Bangalore | Pentesters Approach to AWS IAM
Null Bangalore | Pentesters Approach to AWS IAM
Divyanshu
 
SCALING OF MOS CIRCUITS m .pptx
SCALING OF MOS CIRCUITS m                 .pptxSCALING OF MOS CIRCUITS m                 .pptx
SCALING OF MOS CIRCUITS m .pptx
harshapolam10
 
An Introduction to the Compiler Designss
An Introduction to the Compiler DesignssAn Introduction to the Compiler Designss
An Introduction to the Compiler Designss
ElakkiaU
 
1FIDIC-CONSTRUCTION-CONTRACT-2ND-ED-2017-RED-BOOK.pdf
1FIDIC-CONSTRUCTION-CONTRACT-2ND-ED-2017-RED-BOOK.pdf1FIDIC-CONSTRUCTION-CONTRACT-2ND-ED-2017-RED-BOOK.pdf
1FIDIC-CONSTRUCTION-CONTRACT-2ND-ED-2017-RED-BOOK.pdf
MadhavJungKarki
 
Blood finder application project report (1).pdf
Blood finder application project report (1).pdfBlood finder application project report (1).pdf
Blood finder application project report (1).pdf
Kamal Acharya
 
Height and depth gauge linear metrology.pdf
Height and depth gauge linear metrology.pdfHeight and depth gauge linear metrology.pdf
Height and depth gauge linear metrology.pdf
q30122000
 
Butterfly Valves Manufacturer (LBF Series).pdf
Butterfly Valves Manufacturer (LBF Series).pdfButterfly Valves Manufacturer (LBF Series).pdf
Butterfly Valves Manufacturer (LBF Series).pdf
Lubi Valves
 
EV BMS WITH CHARGE MONITOR AND FIRE DETECTION.pptx
EV BMS WITH CHARGE MONITOR AND FIRE DETECTION.pptxEV BMS WITH CHARGE MONITOR AND FIRE DETECTION.pptx
EV BMS WITH CHARGE MONITOR AND FIRE DETECTION.pptx
nikshimanasa
 
Beckhoff Programmable Logic Control Overview Presentation
Beckhoff Programmable Logic Control Overview PresentationBeckhoff Programmable Logic Control Overview Presentation
Beckhoff Programmable Logic Control Overview Presentation
VanTuDuong1
 
Accident detection system project report.pdf
Accident detection system project report.pdfAccident detection system project report.pdf
Accident detection system project report.pdf
Kamal Acharya
 
一比一原版(osu毕业证书)美国俄勒冈州立大学毕业证如何办理
一比一原版(osu毕业证书)美国俄勒冈州立大学毕业证如何办理一比一原版(osu毕业证书)美国俄勒冈州立大学毕业证如何办理
一比一原版(osu毕业证书)美国俄勒冈州立大学毕业证如何办理
upoux
 
A high-Speed Communication System is based on the Design of a Bi-NoC Router, ...
A high-Speed Communication System is based on the Design of a Bi-NoC Router, ...A high-Speed Communication System is based on the Design of a Bi-NoC Router, ...
A high-Speed Communication System is based on the Design of a Bi-NoC Router, ...
DharmaBanothu
 
Sri Guru Hargobind Ji - Bandi Chor Guru.pdf
Sri Guru Hargobind Ji - Bandi Chor Guru.pdfSri Guru Hargobind Ji - Bandi Chor Guru.pdf
Sri Guru Hargobind Ji - Bandi Chor Guru.pdf
Balvir Singh
 
Digital Twins Computer Networking Paper Presentation.pptx
Digital Twins Computer Networking Paper Presentation.pptxDigital Twins Computer Networking Paper Presentation.pptx
Digital Twins Computer Networking Paper Presentation.pptx
aryanpankaj78
 
Asymmetrical Repulsion Magnet Motor Ratio 6-7.pdf
Asymmetrical Repulsion Magnet Motor Ratio 6-7.pdfAsymmetrical Repulsion Magnet Motor Ratio 6-7.pdf
Asymmetrical Repulsion Magnet Motor Ratio 6-7.pdf
felixwold
 
UNIT 4 LINEAR INTEGRATED CIRCUITS-DIGITAL ICS
UNIT 4 LINEAR INTEGRATED CIRCUITS-DIGITAL ICSUNIT 4 LINEAR INTEGRATED CIRCUITS-DIGITAL ICS
UNIT 4 LINEAR INTEGRATED CIRCUITS-DIGITAL ICS
vmspraneeth
 

Recently uploaded (20)

一比一原版(uofo毕业证书)美国俄勒冈大学毕业证如何办理
一比一原版(uofo毕业证书)美国俄勒冈大学毕业证如何办理一比一原版(uofo毕业证书)美国俄勒冈大学毕业证如何办理
一比一原版(uofo毕业证书)美国俄勒冈大学毕业证如何办理
 
一比一原版(USF毕业证)旧金山大学毕业证如何办理
一比一原版(USF毕业证)旧金山大学毕业证如何办理一比一原版(USF毕业证)旧金山大学毕业证如何办理
一比一原版(USF毕业证)旧金山大学毕业证如何办理
 
Tools & Techniques for Commissioning and Maintaining PV Systems W-Animations ...
Tools & Techniques for Commissioning and Maintaining PV Systems W-Animations ...Tools & Techniques for Commissioning and Maintaining PV Systems W-Animations ...
Tools & Techniques for Commissioning and Maintaining PV Systems W-Animations ...
 
一比一原版(uoft毕业证书)加拿大多伦多大学毕业证如何办理
一比一原版(uoft毕业证书)加拿大多伦多大学毕业证如何办理一比一原版(uoft毕业证书)加拿大多伦多大学毕业证如何办理
一比一原版(uoft毕业证书)加拿大多伦多大学毕业证如何办理
 
Null Bangalore | Pentesters Approach to AWS IAM
Null Bangalore | Pentesters Approach to AWS IAMNull Bangalore | Pentesters Approach to AWS IAM
Null Bangalore | Pentesters Approach to AWS IAM
 
SCALING OF MOS CIRCUITS m .pptx
SCALING OF MOS CIRCUITS m                 .pptxSCALING OF MOS CIRCUITS m                 .pptx
SCALING OF MOS CIRCUITS m .pptx
 
An Introduction to the Compiler Designss
An Introduction to the Compiler DesignssAn Introduction to the Compiler Designss
An Introduction to the Compiler Designss
 
1FIDIC-CONSTRUCTION-CONTRACT-2ND-ED-2017-RED-BOOK.pdf
1FIDIC-CONSTRUCTION-CONTRACT-2ND-ED-2017-RED-BOOK.pdf1FIDIC-CONSTRUCTION-CONTRACT-2ND-ED-2017-RED-BOOK.pdf
1FIDIC-CONSTRUCTION-CONTRACT-2ND-ED-2017-RED-BOOK.pdf
 
Blood finder application project report (1).pdf
Blood finder application project report (1).pdfBlood finder application project report (1).pdf
Blood finder application project report (1).pdf
 
Height and depth gauge linear metrology.pdf
Height and depth gauge linear metrology.pdfHeight and depth gauge linear metrology.pdf
Height and depth gauge linear metrology.pdf
 
Butterfly Valves Manufacturer (LBF Series).pdf
Butterfly Valves Manufacturer (LBF Series).pdfButterfly Valves Manufacturer (LBF Series).pdf
Butterfly Valves Manufacturer (LBF Series).pdf
 
EV BMS WITH CHARGE MONITOR AND FIRE DETECTION.pptx
EV BMS WITH CHARGE MONITOR AND FIRE DETECTION.pptxEV BMS WITH CHARGE MONITOR AND FIRE DETECTION.pptx
EV BMS WITH CHARGE MONITOR AND FIRE DETECTION.pptx
 
Beckhoff Programmable Logic Control Overview Presentation
Beckhoff Programmable Logic Control Overview PresentationBeckhoff Programmable Logic Control Overview Presentation
Beckhoff Programmable Logic Control Overview Presentation
 
Accident detection system project report.pdf
Accident detection system project report.pdfAccident detection system project report.pdf
Accident detection system project report.pdf
 
一比一原版(osu毕业证书)美国俄勒冈州立大学毕业证如何办理
一比一原版(osu毕业证书)美国俄勒冈州立大学毕业证如何办理一比一原版(osu毕业证书)美国俄勒冈州立大学毕业证如何办理
一比一原版(osu毕业证书)美国俄勒冈州立大学毕业证如何办理
 
A high-Speed Communication System is based on the Design of a Bi-NoC Router, ...
A high-Speed Communication System is based on the Design of a Bi-NoC Router, ...A high-Speed Communication System is based on the Design of a Bi-NoC Router, ...
A high-Speed Communication System is based on the Design of a Bi-NoC Router, ...
 
Sri Guru Hargobind Ji - Bandi Chor Guru.pdf
Sri Guru Hargobind Ji - Bandi Chor Guru.pdfSri Guru Hargobind Ji - Bandi Chor Guru.pdf
Sri Guru Hargobind Ji - Bandi Chor Guru.pdf
 
Digital Twins Computer Networking Paper Presentation.pptx
Digital Twins Computer Networking Paper Presentation.pptxDigital Twins Computer Networking Paper Presentation.pptx
Digital Twins Computer Networking Paper Presentation.pptx
 
Asymmetrical Repulsion Magnet Motor Ratio 6-7.pdf
Asymmetrical Repulsion Magnet Motor Ratio 6-7.pdfAsymmetrical Repulsion Magnet Motor Ratio 6-7.pdf
Asymmetrical Repulsion Magnet Motor Ratio 6-7.pdf
 
UNIT 4 LINEAR INTEGRATED CIRCUITS-DIGITAL ICS
UNIT 4 LINEAR INTEGRATED CIRCUITS-DIGITAL ICSUNIT 4 LINEAR INTEGRATED CIRCUITS-DIGITAL ICS
UNIT 4 LINEAR INTEGRATED CIRCUITS-DIGITAL ICS
 

Short-Channel Effects in MOSFET

  • 1. Short Channel Effect in MOSFET Arpan Deyasi Dept of ECE, RCCIIT, Kolkata, India 1/17/2021 1Arpan Deyasi, RCCIIT, India
  • 2. Q. What is meant by short-channel? Leff≃(zD+zS) Leff zDzS Dielectric 1/17/2021 2Arpan Deyasi, RCCIIT, India DrainSource Channel
  • 3. 1/17/2021 3Arpan Deyasi, RCCIIT, India I. Electric field tends to increase because of improper scaling of source potential II. Built-in potential is neither negligible nor scalable III. Vertical depth of source/drain junctions can’t be reduced IV. Mobility decreases with increase of substrate doping V. Subthreshold slope is not scalable Why small geometry effects arise?
  • 4. 1/17/2021 4Arpan Deyasi, RCCIIT, India Short-channel effects in MOSFET 1. Hot electron effect 2. Dielectric breakdown 3. Output impedance variation 4. Mobility degradation 5. Threshold voltage shift
  • 5. 1/17/2021 Arpan Deyasi, RCCIIT, India 5 A few related physical phenomena
  • 6. 1/17/2021 6Arpan Deyasi, RCCIIT, India Hot electron Coldelectron Warmelectron Hotelectron 3 3 2 2 B L B ek T k T>> 3 3 2 2 B L B ek T k T≈ 3 3 2 2 B L B ek T k T<< E v
  • 7. 1/17/2021 Arpan Deyasi, RCCIIT, India 7 Drain-Induced Barrier Lowering
  • 8. 1/17/2021 Arpan Deyasi, RCCIIT, India 8 Surface Scattering
  • 9. 1/17/2021 Arpan Deyasi, RCCIIT, India 9 Channel Length Modulation
  • 10. 1/17/2021 Arpan Deyasi, RCCIIT, India 10 Impact Ionization
  • 11. 1/17/2021 Arpan Deyasi, RCCIIT, India 11 Effects of Short-Channel Geometry
  • 12. 1/17/2021 12Arpan Deyasi, RCCIIT, India Hot electron effect Substrate (p) S (n+) D (n+) Gate Channel Dielectric
  • 13. 1/17/2021 13Arpan Deyasi, RCCIIT, India Dielectric Breakdown Substrate (p) S (n+) D (n+) Gate Channel Dielectric
  • 14. 1/17/2021 14Arpan Deyasi, RCCIIT, India Output Impedance Variation CLM+DIBL VDS Z0 DIBL
  • 15. 1/17/2021 15Arpan Deyasi, RCCIIT, India Mobility Degradation
  • 16. 1/17/2021 16Arpan Deyasi, RCCIIT, India Mobility Degradation 0 1 1 ( ) surf GS ThV V µ µ θ = + − μ0: mobility at threshold voltage θ: mobility reduction factor
  • 17. 1/17/2021 17Arpan Deyasi, RCCIIT, India Threshold Voltage Variation Dielectric S D Gate zSm zDm ΔLS ΔLD zj zj
  • 18. 1/17/2021 18Arpan Deyasi, RCCIIT, India ΔLS: lateral extent of depletion region in source ΔLD: lateral extent of depletion region in drain zS: depth of depletion region in source zD: depth of depletion region in drain zSm: vertical extent of bulk depilation region in source zDm: vertical extent of bulk depilation region in drain Threshold Voltage Variation
  • 19. 1/17/2021 Arpan Deyasi, RCCIIT, India 19 22 2 ( ) ( )j D Dm j Dz z z z L+ = + + ∆ Threshold Voltage Variation 2 2 2 2 0 2 D j D Dm D j D L z L z z z z  ∆ + + ∆   =  + − − 
  • 20. 1/17/2021 Arpan Deyasi, RCCIIT, India 20 Threshold Voltage Variation 2 2 2 ( ( ) 2 ) D j j D D j Dm L z z z z z z ∆ =− + − − + 1 2 1D D j j z L z z   ∆ + −     
  • 21. 1/17/2021 Arpan Deyasi, RCCIIT, India 21 Threshold Voltage Variation Similarly, 1 2 1S S j j z L z z   ∆ + −     
  • 22. 1/17/2021 Arpan Deyasi, RCCIIT, India 22 where Threshold Voltage Variation 2 ( )D DS F A z V qN ε φ   = +    2 S F A z qN ε φ   =    
  • 23. 1/17/2021 Arpan Deyasi, RCCIIT, India 23 ( )TO short channel TO TOV V V− = − ∆ Threshold Voltage Variation VTO: zero-bias threshold voltage ΔVTO: threshold voltage shift
  • 24. 1/17/2021 Arpan Deyasi, RCCIIT, India 24 Threshold Voltage Variation 1 2 2 2 S D TO A F D L L V qN C L ε φ ∆ + ∆ ∆ =− 2 2 2 1 2 1 1 2 1 j TO A F D SD j j z V qN C L zz z z ε φ∆ =− ×       + − + + −            