Abstract: A display device according to an exemplary embodiment includes: a substrate including a display area and a transmission area; a metal blocking layer disposed in the display area of the substrate; an inorganic insulating layer disposed on the metal blocking film; a transistor disposed on the inorganic insulating layer; an emission layer connected to the transistor; and a light blocking layer and a color filter disposed on the emission layer of the display area, wherein the edge of the light blocking layer is protruded toward the transmission area more than the edge of the metal blocking layer.

Abstract: A chemical mechanical polishing apparatus includes a polishing head, including a polishing head body, a membrane attached to a lower portion of the polishing head body, and a reflector disposed between the polishing head body and the membrane, a platen including an opening, an emitter disposed below the opening of the platen, the emitter configured to emit terahertz waves, a detector disposed below the opening of the platen, the detector configured to receive the terahertz waves emitted by the emitter and reflected by the reflector, and an analyzer configured to analyze an electrical signal generated by converting the terahertz waves received by the detector, the analyzer configured to determine a polishing end point.