Method for automatically eliminating three way intersection desi

Details Method for automatically eliminating three way intersection desi Method for automatically eliminating three way intersection desi

1996-10-18

1999-07-13

Teska, Kevin J.

Boots, shoes, and leggings

364489, 430 5, G06F 1700, G06F 1750

Patent

active

059235624

ABSTRACT:
A method automatically locates and eliminates the most frequently encountered phase conflict in phase edge phase shift mask (PSM) designs used in the manufacture of VLSI circuits. The process is implemented as an automatic CAD routine that locates and widens one leg of a three way intersection to avoid phase conflicts. CAD and design rule checking techniques are used to first locate and then to resolve design conflicts prior to actually executing the very time consuming phase shift mask design. The original circuit design is manipulated prior to or as part of the design rule checking, allowing the verification of the manipulations made prior to handing the design off to the mask layout and mask data preparation group.

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