ALEXANDRIA, Va., Oct. 27 -- United States Patent no. 12,774,881, issued on Oct. 27, was assigned to Applied Materials Inc. (Santa Clara, Calif.).

"Multi-purpose confocal sensor systems" was invented by Zhaozhao Zhu (Milpitas, Calif.), Jon Meyer (Fremont, Calif.) and Varoujan Chakarian (San Jose, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method includes causing, by at least one processing device, a confocal sensor system to make a plurality of signal measurements of a target material, each signal measurement of the plurality of signal measurements corresponding to a respective distance of a plurality of distances between a confocal sensor of the confocal sensor system and the target material, ge...