Equation icon  Resistor-capacitor (RC) delay

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Resource type: Equation
Description: As integrated circuits decrease in size and more transistors are squeezed into the same amount of space, the interconnecting wires remain at roughly the same overall length, whilst the width of dielectric layers between them is reduced. This introduces a capacitance and resistance which must be overcome for a signal to pass.

TeX format: {RC delay \approx \rho \varepsilon \frac{L^2}{w^2}}

RC delay {RC delay} = time take for a signal to pass through an interconnect wire (s) {s}
ρ {\rho} = resistivity of interconnect wire (Ω.m) {\Omega.m}
ε {\varepsilon} = permittivity of dielectric material surrounding wire (F.m-1) {F.m^{-1}}
L {L} = length of metal interconnect (m) {m}
w {w} = width or separation of interconnects (m) {m}

Keywords: RC • resistance • capacitance • delay • signal • transistors • MOSFET • IC • integrated cicuits
Categories: Science approaches
Science approaches > Modelling & simulation
Applications > Electronics
Properties > Electrical, magnetic & optical > Resistivity
Testing, analysis & experimentation
Created by: The University of Liverpool
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Date created: 18 August 2010
Date added: 14 September 2010
Resource ID: 3200