The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 14, 2025
Filed:
Mar. 10, 2020
Lam Research Corporation, Fremont, CA (US);
Changyou Jing, Livermore, CA (US);
Oleksandr Mikhnenko, San Diego, CA (US);
Christopher Kimball, San Jose, CA (US);
Lam Research Corporation, Fremont, CA (US);
Abstract
A controller including a voltage sensor coupled to a heater trace integrated in an electrostatic chuck, the voltage sensor configured to sense a voltage difference across the heater trace, wherein the heater trace is associated with a heater zone. The controller including a current sensor coupled to the heater trace and configured to sense a current in the heater trace. The controller including a resistance identifier configured to identify a resistance of the heater trace based on the voltage difference and the current that is sensed. The controller including a temperature correlator configured to approximate a temperature of the heater zone based on the resistance and a correlation function of the heater trace. The correlation function uses a temperature coefficient of resistance of the heater trace.