Patent ID: 9223229
Filing Date: 2015-12-29
Classification: G03F

Abstract:
1. An exposure device, comprising: a stage comprising a first region and a second region related to the first region, a first clamp holder located in the first region and adapted for holding a first substrate, and a second clamp holder located in the second region and adapted for holding a second substrate; an optical projection unit, located above the stage and adapted for exposure of the first substrate in the first region or the second substrate in the second region; a first alignment detection unit, adapted for detecting alignment marks of the first substrate; and a second alignment detection unit, adapted for detecting alignment marks of the second substrate, wherein the first alignment detection unit and the second alignment detection unit are symmetrically positioned on opposite sides of the optical projection unit, wherein a non-zero distance between a center of the first clamp holder and a center of the second clamp holder is equal to a distance between a central axis of the first alignment detection unit and a central axis of the optical projection unit, or equal to a distance between a central axis of the second alignment detection unit and the central axis of the optical projection unit.