BSIM (Berkeley Short-channel

IGFET The metal–oxide–semiconductor field-effect transistor (MOSFET, MOS-FET, or MOS FET) is a type of field-effect transistor (FET), most commonly fabricated by the thermal oxidation, controlled oxidation of silicon. It has an insulated gate, the ...

Model) refers to a family of

MOSFET The metal–oxide–semiconductor field-effect transistor (MOSFET, MOS-FET, or MOS FET) is a type of field-effect transistor (FET), most commonly fabricated by the controlled oxidation of silicon. It has an insulated gate, the voltage of which d ...

transistor models for integrated circuit design. It also refers to the BSIM group located in the Department of Electrical Engineering and Computer Sciences (EECS) at the University of California, Berkeley, that develops these models. Accurate

transistor models Transistors are simple devices with complicated behavior. In order to ensure the reliable operation of circuits employing transistors, it is necessary to scientifically model the physical phenomena observed in their operation using transistor mod ...

are needed for

electronic circuit simulation Electronic circuit simulation uses mathematical models to replicate the behavior of an actual electronic device or circuit. Simulation software allows for modeling of circuit operation and is an invaluable analysis tool. Due to its highly accurat ...

, which in turn is needed for

integrated circuit design Integrated circuit design, or IC design, is a sub-field of electronics engineering, encompassing the particular logic and circuit design techniques required to design integrated circuits, or ICs. ICs consist of miniaturized electronic component ...

. As the devices become smaller each process generation (see

Moore's law Moore's law is the observation that the number of transistors in a dense integrated circuit (IC) doubles about every two years. Moore's law is an observation and projection of a historical trend. Rather than a law of physics, it is an empir ...

), new models are needed to accurately reflect the transistor's behavior. Commercial and industrial analog simulators (such as

SPICE A spice is a seed, fruit, root, bark, or other plant substance primarily used for flavoring or coloring food. Spices are distinguished from herbs, which are the leaves, flowers, or stems of plants used for flavoring or as a garnish. Spices a ...

) have added many other device models as technology advanced and earlier models became inaccurate. To attempt standardization of these models so that a set of model parameters may be used in different simulators, an industry working group was formed, the

Compact Model Coalition The Compact Model Coalition (formerly the Compact Model Council) is a working group in the Electronic Design Automation industry formed to choose, maintain and promote the use of standard semiconductor device models. Commercial and industrial anal ...

, to choose, maintain, and promote the use of standard models. BSIM models, developed at

UC Berkeley The University of California, Berkeley (UC Berkeley, Berkeley, Cal, or California) is a public university, public land-grant university, land-grant research university in Berkeley, California. Established in 1868 as the University of Californi ...

, are one of these standards. Other models supported by the council ar
PSP
an
MEXTRAM
.

BSIM models

The transistor models developed and currently maintained by

are: * BSIM-CMG (Common Multi-Gate), * BSIM-IMG (Independent Multi-Gate), the only model published without source-code (whose publication is foreseen for July 13, 2021) * BSIM-SOI (Silicon-on-Insulator), * BSIM-BULK, formerly BSIM6, * BSIM4, used for 0.13 μm to 20 nm nodes, * BSIM3,{{cite web, url=http://bsim.berkeley.edu/models/bsim4/bsim3/, title=BSIM3 Model, last=, first=, date=, website=, publisher=BSIM Group, UC Berkeley, access-date= a predecessor of BSIM4. Original versions of BSIM models were written in the

C programming language ''The C Programming Language'' (sometimes termed ''K&R'', after its authors' initials) is a computer programming book written by Brian Kernighan and Dennis Ritchie, the latter of whom originally designed and implemented the language, as well as ...

. All newer versions of the models, except BSIM4 and BSIM3, support only

Verilog-A Verilog-A is an industry standard modeling language for analog circuits. It is the continuous-time subset of Verilog-AMS. A few commercial applications may export MEMS designs in Verilog-A format. History Verilog-A was created out of a need to st ...

. For example, the last version of BSIM-SOI which supported C was the version BSIM-SOIv4.4.

BSIM models

References

See also