Microelectronics

Compact Models for Integrated Circuit Design: Conventional by Samar K. Saha

By Samar K. Saha

Compact versions for built-in Circuit layout: traditional Transistors and Beyond presents a latest treatise on compact versions for circuit computer-aided layout (CAD). Written via an writer with greater than 25 years of event in semiconductor methods, units, and circuit CAD, and greater than 10 years of educational event in instructing compact modeling classes, this first-of-its-kind booklet on compact SPICE versions for very-large-scale-integrated (VLSI) chip layout bargains a balanced presentation of compact modeling the most important for addressing present modeling demanding situations and realizing new versions for rising devices.

Starting from uncomplicated semiconductor physics and protecting state of the art gadget regimes from traditional micron to nanometer, this text:

  • Presents regular types for bipolar-junction transistors (BJTs), metal-oxide-semiconductor (MOS) field-effect-transistors (FETs), FinFETs, and tunnel field-effect transistors (TFETs), besides statistical MOS models
  • Discusses the key factor of technique variability, which significantly affects equipment and circuit functionality in complex applied sciences and calls for statistical compact models
  • Promotes extra study of the evolution and improvement of compact versions for VLSI circuit layout and analysis
  • Supplies basic and functional wisdom useful for effective built-in circuit (IC) layout utilizing nanoscale devices
  • Includes workout difficulties on the finish of every bankruptcy and broad references on the finish of the book

Compact types for built-in Circuit layout: traditional Transistors and Beyond is meant for senior undergraduate and graduate classes in electric and electronics engineering in addition to for researchers and practitioners operating within the zone of electron units. even if, even these unusual with semiconductor physics achieve a fantastic clutch of compact modeling recommendations from this book.

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Additional info for Compact Models for Integrated Circuit Design: Conventional Transistors and Beyond

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Since the condition for any system in equilibrium is that the chemical potential must be constant throughout the system, it follows that the Femi level must be constant throughout a semiconductor in equilibrium. 3 Intrinsic Semiconductors An intrinsic semiconductor is a perfect single crystal semiconductor with no impurities or lattice defects. In such materials, the VB is completely filled with electrons and the CB is completely empty. Therefore, in intrinsic semiconductors, there are no charge carriers at 0° K.

In practice, there are several types of mass used for a given material and carrier type [1–11]. The effective mass required to calculate the carrier (electron and hole) concentration is called the density of states effective mass, whereas the mass required to calculate carrier mobility is called the conductivity effective mass. These effective masses depend on temperature. There is a large variation in the reported values of mn* and mp* [16]. 1 [6]. 4 Extrinsic Semiconductors An extrinsic semiconductor is a semiconductor material with added elemental impurities called dopants.

In the channel region of MOSFET (metal-oxide-semiconductor field-effect transistor) devices, the current flow is governed by the surface mobility. 1 of Chapter 5. 2 Electrical Resistivity The drift of charge carriers under an applied electric field E results in a current, called the drift current. 6 × 10 –19 C is the electronic charge and μn is the electron mobility. 34) Thus, the resistivity of a semiconductor depends on the electron and hole concentrations and their mobilities. 6 Impurity concentration versus resistivity for n-type and p-type silicon at 300° K.

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