VLSI LAYOUT


Very-large-scale integration (VLSI) is the process of creating an integrated circuit (IC) by combining millions of MOS transistors onto a single chip. VLSI began in the 1970s when complex semiconductor and communication technologies were being developed. The microprocessor is a VLSI device. Before the introduction of VLSI technology, most ICs had a limited set of functions they could perform. An electronic circuit might consist of a CPU, ROM, RAM and other glue logic. VLSI lets IC designers add all of these into one chip.

Integrated circuit layout, also known IC layout, IC mask layout, or mask design, is the representation of an integrated circuit in terms of planar geometric shapes which correspond to the patterns of metal, oxide, or semiconductor layers that make up the components of the integrated circuit. Originally the overall process was called tapeout as historically early ICs used graphical black crepe tape on mylar media for photo imaging

Corner stitching: A data-structuring technique for VLSI layout tools
free download

Corner stitching is a technique for representing rectangular two-dimensional objects. It appears to be especially well suited for interactive editing systems for VLSI layouts. The data structure has two important features: first. empty space is represented explicitly; and second

A VLSI layout for a pipelined Dadda multiplier
free download

Parallel counters (unary-to-binary converters) are the principal component of a Dadda multiplier. We specify a design first for a pipelined parallel counter, and then for a complete multiplier. As a result of its structural regularity, the layout is suitable for use in a VLSI

Minimizing the longest edge in a VLSI layout
free download

Abstract Recently, Paterson, Ruzzo, and Snyder demonstrated a better layout for complete binary trees than the well known H-tree layout . Whereas the longest edge in the H-tree layout is S (/m), the longest edge in their linear-area layout is G (/n/log n) which is

Boundary element methods for 3D capacitance and substrate resistance calculations in inhomogeneous media in a VLSI layout verification package
free download

In this paper we describe the application of the Boundary Element Method to the layout verification of VLSI Designs. We describe the methods for the calculation of interconnection capacitances and substrate resistances with the use of problem specific Greens functions

A VLSI artwork legalization technique based on a new criterion of minimum layout perturbation.
free download

In this paper we propose a novel VLSI artwork modification technique based on the concept of a minimum layout perturbation. Layouts are designed so that minimum design rules must be satisfied. Often layout processes such as custom layout methodologies and design rule

Placement techniques for VLSI layout using sequence-pair legalization
free download

This thesis considers the placement problem in VLSI layout , which deals with layout optimization of integrated circuits. Most practical formulations of this problem are NP-hard. The most widely used formulations of this problem consider placement of rectangles within a

4-Bit Fast Adder Design: Topology and Layout with Self-Resetting Logic for Low Power VLSI Circuits
free download

Dynamic logic families offer good performance over traditional CMOS logic. This is due to the comparatively high noise margins coupled with the ease of implementation. The main drawbacks of dynamic logic circuits are lack of design automation, charge sharing

A speed-oriented, fully-automatic layout program for random logic VLSI devices
free download

This paper describes a low cost, quick turnaround capability for generating high performance, random logic LSI and VLSI devices using the Standard Cell approach. This standard cell approach, described below, utilizes a fully automatic layout capability that

Vlsi layout based design optimization of a piezoresistive mems pressure sensors using comsol
free download

Structural Mechanics: Used for structural design of the model which includes pre-setting of subdomain consists of silicon as substrate/diaphragm and polysilicon as piezoresistor. Resultant deflection and stress are also studied. Material System: Uses anisotropic models

Node-Disjoint Paths on the Mesh and a New Trade in VLSI Layout
free download

A number of basic models for VLSI layout are based on the construction of nodedisjoint paths between terminals on a multi-layer grid. In this setting, one is interested in minimizing both the number of layers required and the area of the underlying grid. Building on work of

Extracting Geometry from FP for VLSI Layout
free download

The use of CAD tools has become essential in managing the complexity of designing a VLSI circuit. The design process entails going from a function describing the behavior of the circuit to an arrangement of colored polygons on a number of planes (artwork). To use these tools

VLSI layout synthesis
free download

Layout synthesis in VLSI chip design refers to the process of transforming the structural specification of a circuit in the form of modules and interconnects to detailed geometrical data and processing information for chip production. The two main tasks in layout synthesis

CMOS VLSI design of low power SRAM cell architectures with new TMR: A layout approach
free download

Rapid increase in technology for faster and smarter innovations that smoothens the needs of humans resulting in use of super tech gadgets, which use memory, such as, RAM. To meet the increasing demands, the size is getting reduced and the need to save power arises

A rule-based compactor for VLSI /CAD mask layout .
free download

Compactor is a CAD tool used to pack rough mask diagrams to reduce the area size of the VLSI layouts. Often many iterations with human interventions are necessary to accomplish the manipulations of layout compaction. A rule based system, in place of the conventional

RISCE a reduced instruction set circuit extractor for hierarchical VLSI layout verification
free download

We present a circuit extractor preserving the hierarchical layout structure isomorphically. As opposed to existing extractors, our approach permits all cell overlaps which are electrically meaningful. New mask operations based on stretched geometries handle topologically open

On optimal single jog river routing ( VLSI layout )
free download

ABSTRACT The wiring problem of providing a planar rectilinear wire connection between two sets of terminals which lie on two horizontal lines in the plane is called the river routing. The problem has been widely studied. It is normally studied in conjunction with

IC Layout Design of Decoder Using Electric VLSI Design System
free download

Circuit (IC) layout for a decoder. The layout was designed by using an open source software namely Electric VLSI Design System as the Electronic Design Automation (EDA) tool. In order to produce the layout , the basic knowledge of fabrication process and IC design rules

Combining Graphics and Procedures in a VLSI Layout Tool: The Tpack System
free download

Tpack is a system for VLSI module generation that uses both graphical and procedural information. A graphical editor is used to specify tiles of mask information, then procedures are written to arrange the tiles into modules. This technique combines the visual power of

Parallel Network Primal-Dual Method on a Shared Memory Multiprocessor and a Unified Approach to VLSI Layout Compaction and Wire Balancing.
free download

We present a unified approach to the layout compaction and wire balancing problem. We show that the layout compaction problem can be solved by an algorithm which also solves the primal-dual initialization problem. We formulate the wire balancing problem as a

Genetic algorithms for VLSI design, layout , and test automation [Reviews]
free download

Genetic algorithms (CAS) have been around since the mid-1970s. They are pretty general optimization tools inspired by Darwins surviual of the fittest princi-ple. In simple terms, a population of candidate solutions for an optimization problem undergoes a simulated



COMMENT vlsi



FREE IEEE PAPER





VLSI LAYOUT IEEE PAPER