Patent ID: 9202718
Filing Date: 2015-12-01
Classification: B32B,C04B,C23C,H01L,H05B,Y10T

Abstract:
1. An electrostatic chuck comprising a susceptor and an electrostatic chuck electrode embedded within said susceptor, said susceptor comprising an adsorption face of adsorbing a semiconductor: wherein said susceptor comprises a plate shaped main body and a surface corrosion resistant layer, said surface corrosion resistant layer comprising an upper face providing said adsorption face; wherein said surface corrosion resistant layer comprises a ceramic material comprising magnesium, aluminum, oxygen and nitrogen as main components; and wherein said ceramic material comprises (i) a main phase comprising magnesium-aluminum oxynitride phase exhibiting an XRD peak at least in 2θ=47 to 50° taken by using CuKα ray, and (ii) a sub phase comprising a crystal phase of MgO—AlN solid solution wherein aluminum nitride is dissolved into magnesium oxide, wherein said MgO—AlN solid solution has XRD peaks at (200) and (220) faces taken by using, CuKα ray in ranges of 2ω=42.9 to 44.8° and 62.3 to 65.2°, respectively, which are between peaks of cubic phase of magnesium oxide and cubic phase of aluminum nitride, respectively.