Patent ID: 11942345
Assignee: APPLIED MATERIALS, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B  G | IPC B  G  H

Claim 11:
12. A method of centering a substrate in a chamber, comprising:
inserting the substrate into the chamber with a robot arm, wherein the chamber comprises a first pyrometer and a plurality of second pyrometers below the substrate;
determining delta time values for the plurality of second pyrometers relative to the first pyrometer;
calculating time offset values of the delta time values relative to ideal delta time values, wherein the ideal delta time values are the delta time values when the substrate is perfectly centered in a first direction perpendicular to the motion of the substrate; and
finding an optimal match in a graph or a lookup table that correlates time offset values to a distance offset value, wherein the distance offset value is how far off center the substrate is from being perfectly centered in the first direction.