Computer-aided design and analysis of circuits and semiconductor – Nanotechnology related integrated circuit design
Reexamination Certificate
2002-10-10
2004-03-16
Siek, Vuthe (Department: 2825)
Computer-aided design and analysis of circuits and semiconductor
Nanotechnology related integrated circuit design
C716S030000
Reexamination Certificate
active
06708313
ABSTRACT:
COPYRIGHT NOTICE
A portion of the disclosure of this patent document may contain material which is subject to copyright protection. To the extent that it does, the copyright owner has no objection to the facsimile reproduction by anyone of the patent document or the patent disclosure as it appears in the Patent and Trademark Office patent file or records, but otherwise reserves all copyright rights whatsoever. The following notice applies to the software and data as described below and in the drawings hereto: Copyright © 2002, Mentor Graphics Corp., All Rights Reserved.
FIELD OF THE INVENTION
This invention relates to the field of electronic design automation tools, and more specifically, to a mechanism for giving users a shared environment for parallel printed circuit board (PCB) design.
BACKGROUND OF THE INVENTION
A PCB starts out as a schematic design in which the PCB functionality is laid out as a logical diagram of symbolic representations. When the schematic is finished, the schematic is interpreted, or captured, into a virtual PCB of physical components that make up the PCB functionality as detailed in the schematics. The PCB design can then be used to manufacture an electrical circuit in the form of a printed circuit board.
During the PCB layout process, many users may work on the schematic design to create the virtual PCB. Traditionally, this has been accomplished via a design splitting mechanism whereby each user can check out a corresponding (assigned) piece of the design to make edits to the PCB layout.
To see how edits affect the most current edits to the remainder of the board, and vice versa, the edits are merged back into the original database where the master design is updated with the edits. However, this approach is restrictive in that the user is limited to viewing only areas of the design that are opened by each individual. Consequently, the user cannot see edits that are made to the rest of the board while the user's edits are being made.
Furthermore, there is currently no known mechanism that allows users to simultaneously work in shared areas of a PCB design while maintaining the integrity of the PCB design.
SUMMARY OF THE INVENTION
In one aspect of the invention is a method for simultaneously allowing multiple users to edit in shared areas of a master design. The method includes displaying the master design, allowing a first user to edit in a shared area of the design, while simultaneously allowing a second user to edit in a shared area of the design while preserving the integrity of the design.
REFERENCES:
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patent: 6023565 (2000-02-01), Lawman et al.
patent: 6094654 (2000-07-01), Van Huben et al.
patent: 2002/0144212 (2002-10-01), Lev et al.
Geppert.L.IC Design on the World Wide Web, IEEE Spectrum. Oct. 2001. pp. 31-36.
Natarajan Venkat
Petunin Vladimir
Pfeil Charles
Potts Henry
Smith Edwin Franklin
Banner & Witcoff , Ltd.
Levin Naum
Siek Vuthe
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