Patent ID: 11947254
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 14:
15. A system of semiconductor manufacturing, comprising:
a processor;
a non-transitory memory device coupled to the processor;
a testing tool coupled to the processor;
a mask manufacturing tool coupled to the processor; and
an IC manufacturing tool coupled to the processor;
wherein the processor is configured to execute instructions stored on the non-transitory memory device to:
select one or more regions of a device layout;
calibrate an optical proximity correction (OPC) model by adjusting a plurality of parameters including a first set of parameters and a second set of parameters, wherein the first set of parameters indicate a long-range effect caused by an electron-beam lithography tool for making a mask used to manufacture a structure, and the second set of parameters indicate a geometric feature of a structure or a manufacturing process to make the structure, wherein the first set of parameters are constants;
calculate a first grid pattern density map of the one or more regions of the device layout;
generate a long-range correction map of the one or more regions, at least based on the calibrated OPC model and the first grid pattern density map of the device layout; and
perform an OPC to generate a corrected mask layout at the one or more regions, at least based on the generated long-range correction map and the calibrated OPC model;
control the IC manufacturing tool to expose a resist layer on a wafer using the corrected mask layout to form a patterned resist layer;
determine whether a measured critical dimension (CD) of the patterned resist layer at the one or more regions is within a predetermined range;
adjust a single parameter of the second set of parameters without modifying other parameters of the second set of parameters if the determined measured CD is not within the predetermined range; and
iteratively perform the calibrating the OPC model, the generating the long-range correction map, the performing the OPC, and the adjusting the second set of parameters until the measured CD is within the predetermined range to generate a final corrected mask layout, wherein in each iteration one parameter of the second set of parameters is adjusted; and
control the mask manufacturing tool to produce the final corrected mask layout as a mask.