Patent ID: 11862521
Assignee: KLA CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 12:
13. A multiple-tool parameter set calibration and misregistration measurement system useful in manufacture of semiconductor devices comprising:
at least a first reference misregistration metrology tool operative to use a first set of measurement parameters to measure misregistration between at least two layers on a wafer, said wafer being selected from a batch of wafers, thereby generating a first misregistration data set;
at least one initially-uncalibrated misregistration metrology tool operative to measure misregistration between at least two layers on a wafer selected from said batch of wafers; and
a calibrated set of measurement parameters generator (CSMPG) operative to:
receive from said at least a first reference misregistration metrology tool said first set of measurement parameters and said first misregistration data set;
process said first set of measurement parameters and said first misregistration data set, thereby generating a calibrated set of measurement parameters, wherein said calibrated set of measurement parameters comprises at least one of:
a linear position of a wafer stage used m misregistration measurement;
an azimuthal orientation of a wafer stage used in misregistration measurement;
an elevation angular orientation of a wafer stage used in misregistration measurement;
an axis along which misregistration is measured;
a region of interest of a metrology target;
a numerical aperture used in misregistration measurement;
a polarization of light used in misregistration measurement;
wavelengths of light used in misregistration measurement;
a bandwidth of wavelengths of light used in misregistration measurement;
an intensity of light used in misregistration measurement;
a focal depth used in misregistration measurement;
a camera used in misregistration measurement;
an apodizer used in misregistration measurement; and
an optics channel used in misregistration measurement; and

communicate said calibrated set of measurement parameters from said CSMPG to said at least one initially-uncalibrated misregistration metrology tool to facilitate calibrating of said at least one initially-uncalibrated misregistration metrology tool.