Patent ID: 8524005

Claim:
A heat-transfer structure disposed in a processing chamber in which plasma processing is performed on a substrate under a reduced pressure, the structure comprising: an electrostatic chuck a consumable component including an exposed surface exposed to plasma; said consumable component includes an annular focus ring disposed to enclose an outer peripheral edge of the substrate; a cooling component that cools said consumable component; and a heat-transfer member interposed between said focus ring and said electrostatic chuck and made of a gel-like material, wherein a ratio of a hardness of said heat-transfer member expressed in Asker C to a thermal conductivity of said heat-transfer member expressed in W/m·K is less than 20, wherein a hardness of said heat-transfer member expressed in Asker C is 10 to 100, and wherein a surface roughness of a contact surface of said focus ring is 6.3 μm or greater in Ra, the contact surface contacting said heat-transfer member.