PN Junction Length Calculator

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✖Depletion Region Width in a typical Si diode ranges from a fraction of a micrometer to tens of micrometers depending on device geometry, doping profile, and external bias.ⓘ Depletion Region Width [L_d]			+10% -10%
✖Effective Channel Length is defined as the path that links the charge carriers between the drain and the source.ⓘ Effective Channel Length [L_eff]			+10% -10%

✖PN Junction Length is defined as the total length of the junction from p-side to n-side in a semiconductor.ⓘ PN Junction Length [L_pn]

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Formula

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PN Junction Length

Formula

`"L"_{"pn"} = "L"_{"d"}+"L"_{"eff"}`

Example

`"19.01mm"="11.01mm"+"8mm"`

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PN Junction Length Solution

STEP 0: Pre-Calculation Summary

Formula Used

PN Junction Length = Depletion Region Width+Effective Channel Length
L_pn = L_d+L_eff
This formula uses 3 Variables

Variables Used

PN Junction Length - (Measured in Meter) - PN Junction Length is defined as the total length of the junction from p-side to n-side in a semiconductor.
Depletion Region Width - (Measured in Meter) - Depletion Region Width in a typical Si diode ranges from a fraction of a micrometer to tens of micrometers depending on device geometry, doping profile, and external bias.
Effective Channel Length - (Measured in Meter) - Effective Channel Length is defined as the path that links the charge carriers between the drain and the source.

STEP 1: Convert Input(s) to Base Unit

Depletion Region Width: 11.01 Millimeter --> 0.01101 Meter (Check conversion here)
Effective Channel Length: 8 Millimeter --> 0.008 Meter (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

L_pn = L_d+L_eff --> 0.01101+0.008

Evaluating ... ...

L_pn = 0.01901

STEP 3: Convert Result to Output's Unit

0.01901 Meter -->19.01 Millimeter (Check conversion here)

FINAL ANSWER

19.01 Millimeter <-- PN Junction Length

(Calculation completed in 00.004 seconds)

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Created by Shobhit Dimri

Bipin Tripathi Kumaon Institute of Technology (BTKIT), Dwarahat

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< 15 CMOS Circuit Characteristics Calculators

Effective Capacitance in CMOS

Go Effective Capacitance in CMOS = Duty Cycle*(Off Current*(10^(Base Collector Voltage)))/(Gates on Critical Path*[BoltZ]*Base Collector Voltage)

Permittivity of Oxide Layer

Go Permittivity of Oxide Layer = Oxide Layer Thickness*Input Gate Capacitance/(Gate Width*Length of Gate)

Oxide Layer Thickness

Go Oxide Layer Thickness = Permittivity of Oxide Layer*Gate Width*Length of Gate/Input Gate Capacitance

Width of Gate

Go Gate Width = Input Gate Capacitance/(Capacitance of Gate Oxide Layer*Length of Gate)

Sidewall Perimeter of Source Diffusion

Go Sidewall Perimeter of Source Diffusion = (2*Transition Width)+(2*Length of Source)

Critical Electric Field

Go Critical Electric Field = (2*Velocity Saturation)/Mobility of Electron

Transition Width of CMOS

Go Transition Width = MOS Gate Overlap Capacitance/MOS Gate Capacitance

Effective Channel Length

Go Effective Channel Length = PN Junction Length-Depletion Region Width

Depletion Region Width

Go Depletion Region Width = PN Junction Length-Effective Channel Length

PN Junction Length

Go PN Junction Length = Depletion Region Width+Effective Channel Length

Voltage at Minimum EDP

Go Voltage at Minimum EDP = (3*Threshold Voltage)/(3-Activity Factor)

CMOS Critical Voltage

Go Critical Voltage in CMOS = Critical Electric Field*Mean Free Path

CMOS Mean Free Path

Go Mean Free Path = Critical Voltage in CMOS/Critical Electric Field

Width of Source Diffusion

Go Transition Width = Area of Source Diffusion/Length of Source

Area of Source Diffusion

Go Area of Source Diffusion = Length of Source*Transition Width

PN Junction Length Formula

PN Junction Length = Depletion Region Width+Effective Channel Length
L_pn = L_d+L_eff

What is Subthreshold conduction ?

Subthreshold conduction or subthreshold leakage or subthreshold drain current is the current between the source and drain of a MOSFET when the transistor is in subthreshold region, or weak-inversion region, that is, for gate-to-source voltages below the threshold voltage.

How to Calculate PN Junction Length?

PN Junction Length calculator uses PN Junction Length = Depletion Region Width+Effective Channel Length to calculate the PN Junction Length, PN Junction Length is defined as the total length of the junction from p-side to n-side in a semiconductor. PN Junction Length is denoted by L_pn symbol.

How to calculate PN Junction Length using this online calculator? To use this online calculator for PN Junction Length, enter Depletion Region Width (L_d) & Effective Channel Length (L_eff) and hit the calculate button. Here is how the PN Junction Length calculation can be explained with given input values -> 1.6E+7 = 1.101E-05+8E-06.

FAQ

What is PN Junction Length?

PN Junction Length is defined as the total length of the junction from p-side to n-side in a semiconductor and is represented as L_pn = L_d+L_eff or PN Junction Length = Depletion Region Width+Effective Channel Length. Depletion Region Width in a typical Si diode ranges from a fraction of a micrometer to tens of micrometers depending on device geometry, doping profile, and external bias & Effective Channel Length is defined as the path that links the charge carriers between the drain and the source.

How to calculate PN Junction Length?

PN Junction Length is defined as the total length of the junction from p-side to n-side in a semiconductor is calculated using PN Junction Length = Depletion Region Width+Effective Channel Length. To calculate PN Junction Length, you need Depletion Region Width (L_d) & Effective Channel Length (L_eff). With our tool, you need to enter the respective value for Depletion Region Width & Effective Channel Length and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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