Computer Aids for VLSI Design
Steven M. Rubin
Copyright © 1994

Chapter 7: The Output of Design Aids

Section 5 of 5

7.5 Summary

This chapter has described the necessary steps for the fabrication of VLSI circuits. The CAD system must be able to generate manufacturing specifications in a number of different formats, depending on the particular environment of design. Also, interchange formats are a necessary part of a CAD system, to let it communicate with the other systems in the world. This chapter also covered specific implementation issues such as format conversion, testing interface, layout standards, and manufacturing standards. CAD systems and their users should understand these issues in order to complete their task and realize their designs.


  1. Why is there no hierarchy in descriptions of wire-wrap or printed-circuit boards?
  2. List three disadvantages of binary file formats.
  3. What is the most important feature of any standard output format?
  4. List two reasons to convert between output formats.
  5. What is the programming-language equivalent of cell libraries? Of design frames?
  6. What difficulties may prevent EDIF from becoming a standard?
  7. What technological advance will remove the distinction between manufacturing formats and interchange formats?


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