Patent ID: 9721821
Date: 2017-08-01
CPC Classifications: C23C,H01L,H02N

Claim:
1. An electrostatic chuck comprising: a surface layer activated by a voltage in an electrode to form an electric charge to electrostatically clamp a substrate to the electrostatic chuck, the surface layer including a plurality of hard-baked photo-patterned polymer protrusions comprising a hard-baked photo-patterned polymer and a charge control layer to which the plurality of hard-baked photo-patterned polymer protrusions adhere, the plurality of hard-baked photo-patterned polymer protrusions extending to a height above portions of the charge control layer surrounding the plurality of hard-baked photo-patterned polymer protrusions to support the substrate upon the plurality of hard-baked photo-patterned polymer protrusions during electrostatic clamping of the substrate.