Structure and method for separating geometries in a design layout into multi-wide object classes
US6871332B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2002 |
| Grant date | Mar 22, 2005 |
| Priority date | — |
| Expiry date | Mar 21, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F30/39
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Manipulation of a multi-wide object class design layout to facilitate design rule checking or automatic correction of design rule errors is improved by deriving wide class objects from geometries of the design layout, and applying certain rules to non-virtual boundaries of the wide class objects that are not applied to virtual boundaries of the wide class objects. In an exemplary embodiment, the wide class objects are preferably derived by sizing down, then sizing up, each geometry by a sizing factor equal to half the minimum width of the particular wide class object less an amount that preferably corresponds to that represented by a minimum resolution of the design layout. Portions of a geometry that are otherwise excluded as being too narrow in width, but that lie wholly within a correction factor of the boundary of the wide class object otherwise derived, are preferably included to form effective wide class objects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.