Patent ID: 11953823
Assignee: ASML NETHERLANDS B.V.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A method of controlling an imaging process that uses an optical proximity correction (OPC) model, the method comprising:
obtaining an already-calibrated OPC model that is configured to model behavior of OPC modifications to a pre-OPC design in a process for forming a pattern on a substrate using a post-OPC design in a patterning process;
using the patterning process in a manufacturing environment;
collecting process control data for substrates patterned using the patterning process in the manufacturing environment;
analyzing, by a hardware computer system, the collected process control data to verify that the OPC model is correcting pattern features within a selected threshold; and
for pattern features falling outside the selected threshold, determining a modification to the imaging process to correct imaging errors.