Patent 9543184 was granted and assigned to Kyocera Corporation on January, 2017 by the United States Patent and Trademark Office.
The present invention is an electrostatic chuck including a ceramic base body and an adsorption electrode provided inside of or on the lower surface of the ceramic base body and having a portion where a Mn content is 1×10−4% by mass or less in a region from the upper surface of the ceramic base body to the adsorption electrode.