Integrated OPC verification tool
View Patent ↗An integrated verification and manufacturability tool provides more efficient verification of integrated device designs than verification using several different verification components. The integrated verification and manufacturability includes a hierarchical database to store shared design data accessed by multiple verification components (e.g., layout versus schematic, design rule check, optical process correction, phase shift mask assignment and OPC verification and machine language conversion). The hierarchical database includes representations of one or more additional, or intermediate layer structures that are created and used by the verification components for operations performed on the design being verified. Use of a single hierarchical database having shared data for access and use by multiple verification components streamlines the verification process, which provides an improved verification tool.
1. An integrated verification and manufacturability tool comprising:
a hierarchical database to represent at least a portion of an integrated device layout in a hierarchical manner;
an optical and process correction (OPC) component that operates on the integrated device layout by accessing said hierarchical database, and determining corrections for one or more edge fragments in the integrated device layout and storing the corrections in the hierarchical database; and
an optical and process correction (OPC) verification component that operates on the integrated device layout by accessing the OPC corrections stored in the hierarchical database and analyzing them with a simulation engine to ensure that the edge fragments of the integrated device design will print as desired.
2. The integrated verification and manufacturability tool of claim 1 , wherein the integrated verification and manufacturability tool further comprises a layout versus schematic (LVS) component.
3. The integrated verification and manufacturability tool of claim 1 , wherein the integrated verification and manufacturability tool further comprises a design rule checking (DRC) component.
4. The integrated verification and manufacturability tool of claim 1 , wherein the integrated verification and manufacturability tool further comprises a phase shift mask (PSM) component.
5. The integrated verification and manufacturability tool of claim 1 , wherein the integrated verification and manufacturability tool further comprises an optical rule checking (ORC) component.
6. The integrated verification and manufacturability tool of claim 1 , wherein the OPC component and the OPC verification component analyze the integrated device layout at a number of simulation sites and wherein at least some of the simulation sites used by the OPC verification component are different from the simulation sites used by the OPC component.
7. The integrated verification and manufacturability tool of claim 6 , wherein the OPC verification component analyzes the integrated device layout with a dense grid of simulation sites.
8. The integrated verification and manufacturability tool of claim 7 , wherein the dense grid of simulation sites is uniform.
9. The integrated verification and manufacturability tool of claim 7 , wherein the dense grid of simulation sites is variable.