Patent ID: 7982855
Filing Date: 2011-07-19
Classification: G03F

Abstract:
1. Illuminator of a photolithography device, comprising: a source of a light beam for illuminating a mask and for exposing a zone of a wafer, at least one main microlens array for focusing the light beam in a focusing plane, and a shutter comprising at least one shutter plate, which plate comprises: at least one portion opaque to the light beam, and a plurality of portions transparent to the beam, wherein the plate is capable of being moved with respect to the beam in a direction of movement substantially parallel to the plate, so that the opaque portion can at least partially block the light beam, or so that the transparent portions can allow said light beam at least partially to pass through, wherein said illuminator further comprises wherein the shutter is located in a zone near said pupil image, in a plane conjugated with the plane of the mask and the plane of the wafer.