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

Claim 0:
1. A multiple-tool parameter set calibration and misregistration measurement method useful in manufacture of semiconductor devices comprising:
using at least a first reference misregistration metrology tool using 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;
transmitting said first set of measurement parameters and said first misregistration data set to a calibrated set of measurement parameters generator (CSMPG);
processing said first set of measurement parameters and said first measurement data set, using said CSMPG, 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 in 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;

transmitting said calibrated set of measurement parameters from said CSMPG to at least one initially-uncalibrated misregistration metrology tool;
calibrating said at least one initially-uncalibrated misregistration metrology tool based on said calibrated set of measurement parameters; and
thereafter measuring misregistration between at least two layers of at least one wafer, selected from said batch of wafers, by using said at least one initially-uncalibrated misregistration metrology tool using said calibrated set of measurement parameters.