Title page for ETD etd-11012008-063423

Type of Document Master's Thesis
Author Al-Mahmood, Saiyid Jami Islah Ahmad
URN etd-11012008-063423
Title A distributed design rule checker for VLSI layouts
Degree Master of Science
Department Electrical Engineering
Advisory Committee
Advisor Name Title
Midkiff, Scott F. Committee Chair
Nunnally, Charles E. Committee Member
Tront, Joseph G. Committee Member
  • Integrated circuits
Date of Defense 1990-01-03
Availability restricted

VLSI technology is continually fueling the need for more efficient computer aided design tools. Parallel or distributed processing is a possible solution to this problem. Advances in computer networking have made distributed processing over a local area network very attractive and cost-effective. This research investigates the application of such a large-grained parallel processing method to the task of checking geometric constraints or design rules that are imposed on the layout of VLSI circuits to ensure a correct implementation of the design despite imperfections in the fabrication process.

The thesis begins with a study of design rule checking algorithms including algorithms for parallel processing as applied to design rule checking. Then, the algorithms for a technology independent design rule verification tool are developed. For distributed processing, two separate approaches are examined. One approach, called the data partitioning method, divides a fully instantiated or non-hierarchical layout into several sections and then processes each section on a different computer. The second approach looks for smaller tasks within the design rule checking process that can be executed in parallel and is called the task partitioning method. A dynamic task-scheduling algorithm is used to assign the tasks to the available processors. Implementations of both of these parallel processing schemes on a local area network of workstations are described. Experiments are performed to assess the performance of the programs and the results of testing a few layouts are presented.

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