Patent ID: 7981218

Claim:
A substrate supporting mechanism including a function for heating a substrate placed thereon in a chamber of a substrate processing apparatus, the substrate supporting mechanism comprising: a worktable configured to place the substrate thereon and including a heating element made of silicon carbide and formed in a predetermined pattern; a support member connected to a central portion of a lower side of the worktable and supporting the worktable inside the chamber; electric feeder electrodes connected to the heating element from outside the chamber through the support member and configured to supply electricity to the heating element; and a partition member made of an electrically insulating material and interposed between portions adjacent to each other in the heating element formed in the predetermined pattern, wherein the worktable includes a cover that covers at least an upper side of the heating element, a sheeting plate disposed below the heating element, and a base member disposed below the sheeting plate, each of the cover, the sheeting plate, and the base member being made of an electrically insulating material, the heating element includes first and second zones respectively forming their own electric feed pathways, which are electrically independent of each other, each of the first and second zones includes first and second patterned parts respectively forming their own sub-patterns, which are respectively provided with first and second terminals at their terminal ends disposed in a central area of the worktable and are electrically connected to each other at their connection ends opposite to the terminal ends, the first and second terminals leading to corresponding ones of the electric feeder electrodes, the partition member includes an inter-zone partition plate interposed between the first and second zones and an intra-zone partition plate interposed between the first and second patterned parts, to prevent electric discharge, such that the intra-zone partition plate has a central-area plate portion interposed between portions of the first and second patterned parts in the central area of the worktable to prevent electric discharge from occurring due to a large electric potential difference caused when an electric current flows between the first and second terminals, the inter-zone partition plate projects from a lower surface of the cover and extends to the base member, and the intra-zone partition plate projects from an upper surface of the sheeting plate and extends to the cover.