Abstract: The invention provides a design and an integrated circuit having a substantially uniform density and electrical characteristics between parts of the IC that are angled at 45 degrees relative to one another. In particular, the invention provides fill tiling patterns oriented substantially uniformly to electrical structures of either orthogonal or 45 degree angle orientation.
Type:
Grant
Filed:
January 9, 2003
Date of Patent:
September 20, 2005
Assignee:
International Business Machines Corporation
Inventors:
Robert J. Allen, John M. Cohn, Peter A. Habitz, William C. Leipold, Ivan L. Wemple, Paul S. Zuchowski