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VLSI Definitions
           Definitions of the terms that are often used in Chip design world. Please help us to improve the list. You can add VLSI terms and its definitions with out registering in the site.

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There are 257 entries in the glossary.
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Term Definition
Generic nameA designation or identification, such as code name, code number, trade name, or brand name, used to identify a chemical by a designation other than its chemical name.
 
Golden RTLUsually design process involves lot of changes and ECOs (Engineering Change Order) where the code will be modified. Once all these modifications are done and the netlist is finalised to be processed for next stage, it\'s called \"Golden RTL\" which usually won\'t have much architectural changes.
 
HALThe portion of the operating system that lets programs deal with hardware directly.
 
HALHardware Abstraction Layer
 
HARMHigh Aspect Ratio MEMS. MEMS manufacturing techniques including surface micromachining that result in high aspect ratio geometry.
 
High-reliabilityThe ability of a device to continue to meet a challenging specification over extended periods of time.
 
Hot carrierA charge-carrying particle with sufficient energy to pass over a diode barrier.Repeated occurrences of this phenomenon can lead to device failure.
 
Hot chuckA fixture holding IC die or packages that can be heated for an assembly operation or for temperature testing.
 
ICA semiconductor device that combines multiple transistors and other components and interconnects on a single piece of semiconductor material.
 
ImpurityIn semiconductor technology, a material such as boron, phosphorus or arsenic added in small quantities to a crystal to produce an excess of electrons (donor impurity) or holes (acceptor impurity). Also called \"dopant\".
 
In-line testsTests applied to semiconductor wafers during the fabrication process to detect defects.
 
InsulatorA material that is a poor conductor of electricity or heat, and used to separate conductors from one another or to protect personnel from active electrical devices. Examples: silicon dioxide (glass), silicon nitride, rubber, ceramics, wood.
 
IntegrationThe combination of various components to form a system. Heterogeneous integration includes blocks or subsystems from different technologies such as photonics, MEMS, CMOS.
 
InverterA switch-mode voltage regulator in which output voltage is negative with respect to its input voltage.
 
JFETJunction field-effect transistor. A FET in which the gate is created by reverse-biased junction
 
JumperA jumper fits on two metal connectors. It provides an electrical connection between the two wires to enable a semi-permanent hardware configuration.
 
Karnaugh MappingA means of showing the relationship between logic inputs and desired output. Generally a truth table is mapped to a smaller, more workable grid of output values (1s and 0s). Karnaugh Mappings are often used when working with electronic circuits and trying to predict their output.
 
Lab-on-CDMEMS / Microfluidic technology applied to analytical instrumentation. The resulting instruments fits onto a standard CD-ROM.
 
Lab-on-chipMEMS technology applied to analytical instrumentation. The instrument is reduced in size such that it fits onto one chip.
 
Latent defectA microcircuit defect that is not likely to inhibit performance until well into the microcircuit\'s lifetime.
 
LayoutThe physical implementation of the components and interconnections which make up an integrated circuit or microsystem chip.
 
Leakage currentAll undesirable stray current in a microcircuit.
 
LFSRA shift register in which some of its outputs are connected to the input through some logic gates.
 
Linear energy transfer (LET)The amount of energy transfered to an IC\'s active area by a traversing charged particle.
 
LINT checkThe LINT program can be used to detect certain language (can be any language like verilog, vhdl, systemC, C++, C. etc.) constructs that may cause portability problems. In case of HDL LINT check point out malicious codes which may create problem in the final implementation. This is very important especially when a code is handled by different tools. Those problems usually will not identified by simulators.
Read this article about lint check
 
Logic gatePhysically, a logic gate is a transistor circuit which allows voltages to pass through based on simple logic rules applied to its inputs.
 
MAPAn automotive industry pressure sensor used to sense fuel injection inlet air pressures for 2-D and 3-D fuel mapping.
 
MaskA thin photographic film used to transfer part of a circuit pattern to the surface of a semiconductor wafer. A number of masks are used in combination with various additive and subtractive operations, to create the integrated circuits on a wafer.
 
Mask, trimetalA mask formed by etching a metal protected by a third metal in certain areas.
 
Masking layerA patterned layer associated with a semiconductor integrated circuit. A typical circuit will require between 12 and 25 masking layers for full definition.
 


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