Patent ID: 7209339

Claim:
An electrostatic chuck for attracting an insulative substrate to be processed, the electrostatic chuck comprising: a dielectric layer having a first surface which attracts an insulative substrate, and a second surface on which a plurality of electrodes are intricately provided to be alternatingly adjacent; wherein the dielectric layer is comprised of a sintered ceramic, a distance between the adjacent electrodes and the thickness of the dielectric layer are adjusted such that when a potential difference is established between the electrodes, a non-uniform electric field is formed in which an insulative substrate is attracted to the first surface; a distance between the adjacent electrodes is equal to or greater than 0.5 mm and less than or equal to 2 mm, a thickness of the dielectric layer is equal to or greater than 0.3 mm and less than or equal to 2 mm, and a width of the electrodes is equal to greater than 0.5 mm and less than or equal to 4 mm so as to attract an insulative substrate whose top surface and surface to be mounted on the electrostatic chuck has an electrically insulative characteristic.