Patent ID: 6134096
Filing Date: 2000-10-17
Classification: G03F,H01L,Y10T

Abstract:
An electrostatic chuck for attracting an object to be treated, comprising:a substrate;an insulating dielectric single layer comprising a ceramic material with a porosity level of not more than 3%; andat least one electrode being formed on and in contact with a top surface of said substrate and the insulating dielectric single layer being formed on and in contact with a top surface of said at least one electrode; whereinsaid object is attracted onto said at least one electrode via the insulating dielectric layer;said insulating dielectric single layer having an average thickness of 1 to 3 mm; andsaid insulating dielectric layer is a ceramic material selected from the group consisting of silicon nitride, aluminum nitride, boron nitride, sialon, silicon carbide and alumina-silicon nitride material, said electrostatic chuck having a leaked current value of 0.0017 to 0.0100 mA/cm.sup.2.