A novel full chip process window OPC based on matrix retargeting

Process window OPC (PWOPC) is widely used in advanced technology nodes as one of the most important resolution enhancement techniques (RET). 1 PWOPC needs to consider not only edge placement error (EPE) from nominal condition simulations, but also constraints based on process variation simulations, such as pinch and bridge related requirements based on process variation band (PVBAND). Those constraints can be challenging to meet as feature size continues to shrink in advanced nodes. In this paper a novel matrix retargeting based PWOPC was developed to find optimal OPC solutions by solving constraints-based matrix and applying minimal retargeting as needed. 2 Experiment results showed enhanced process window and reasonable performance.