Patent ID: 9651868
Date: 2017-05-16
CPC Classifications: G03F

Claim:
1. A substrate processing apparatus comprising: a rotary cylindrical member that includes a cylindrical supporting surface curved with a constant radius from a predetermined center line and that is configured to rotate about the center line while having a part of a long substrate wound around the supporting surface in order to feed the substrate in a length direction of the substrate; a processing mechanism configured to perform a predetermined process on the substrate at a specific position in a circumferential direction of the supporting surface among a part of the substrate wound around the supporting surface of the rotary cylindrical member; a scale member that is configured to rotate about the center line along with the rotary cylindrical member so as to measure a displacement in a circumferential direction of the supporting surface of the rotary cylindrical member or a displacement in a direction of the center line of the rotary cylindrical member and that includes a scale portion carved in a ring shape; a first reading mechanism that is arranged to face the scale portion, that is disposed in substantially a same direction as the specific position when viewed from the center line, and that is configured to read the scale portion; a pattern detecting device that includes a detection probe for detecting a specific pattern formed discretely or continuously in the length direction of the substrate on the substrate and that is disposed around the rotary cylindrical member so as to set a detection area of the detection probe at an upstream side in a conveyance direction of the substrate than the reading mechanism; and a second reading mechanism that is arranged to face the scale portion, that is disposed in substantially a same direction as the detection area when viewed from the center line, and that is configured to read the scale portion.