| US 7,571,408 B1 | ||
| Methods and apparatus for diagonal route shielding | ||
| Judd M Ylinen, San Francisco, Calif. (US); and Alexander Khainson, Morgan Hill, Calif. (US) | ||
| Assigned to Cadence Design Systems, Inc., San Jose, Calif. (US) | ||
| Filed on Mar. 09, 2005, as Appl. No. 11/76,204. | ||
| Int. Cl. G06F 17/50 (2006.01) | ||
| U.S. Cl. 716—10 [716/8; 716/9; 257/659; 257/660] | 10 Claims |
| 1. An integrated circuit (“IC”) layout comprising a plurality of layers, each layer having a preferred routing direction and
a set of routing tracks that are in the direction of the preferred routing direction, the layout comprising:
a set of elements;
a set of routes for connecting the set of elements, each route comprising one or more route segments, at least one particular
route segment has endpoints and bend points all located on one or more routing tracks; and
a set of shield segments for shielding the set of routes, each shield segment representative of an IC shield segment formed
by a conductive material, each shield segment being adjacent to a route segment, wherein an angle between two shield segments
on a particular layer of the layout is neither collinear nor orthogonal, a particular set of shield segments being adjacent
to the particular route segment, each of which has endpoints and bend points all located on one or more routing tracks,
wherein said layout is stored on a computer readable storage device.
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