摘要:
There is provided a projection objective for a projection exposure apparatus that has a primary light source for emitting electromagnetic radiation having a chief ray with a wavelength≦193 nm. The projection objective includes an object plane, a first mirror, a second mirror, a third mirror, a fourth mirror; and an image plane. The object plane, the first mirror, the second mirror, the third mirror, the fourth mirror and the image plane are arranged in a centered arrangement around a common optical axis. The first mirror, the second mirror, the third mirror, and the fourth mirror are situated between the object plane and the image plane. The chief ray, when incident on an object situated in the object plane, in a direction from the primary light source, is inclined away from the common optical axis.
摘要:
There is provided a projection exposure system operable in a scanning mode along a scanning direction. The projection exposure system includes a collector that receives light having a wavelength ≦193 nm and illuminates a region in a plane. The plane is defined by a local coordinate system having a y-direction parallel to the scanning direction and an x-direction perpendicular to the scanning direction. The collector includes (a) a first mirror shell, (b) a second mirror shell within the first mirror shell, and (c) a fastening device for fastening the first and second mirror shells. The mirror shells are substantially rotational symmetric about a common rotational axis. The fastening device has a support spoke that extends in a radial direction of the mirror shells, and the support spoke, when projected into the plane, yields a projection that is non-parallel to the y-direction.
摘要:
There is provided an illumination system for microlithography with wavelengths ≦193 nm. The illumination system includes a primary light source, a first optical component, a second optical component, an image plane, and an exit pupil. The first optical component transforms the primary light source into a plurality of secondary light sources that are imaged by the second optical component in the exit pupil. The first optical component includes a first optical element having a plurality of first raster elements that are imaged into the image plane, producing a plurality of images being superimposed at least partially on a field in the image plane. The plurality of first raster elements are rectangular. The field is a segment of an annulus, and the second optical component includes a first field mirror with negative optical power for shaping the field to the segment of the annulus and a second field mirror with positive optical power. Each of a plurality of rays intersects the first field mirror with an incidence angle greater than 70° and each of the plurality of rays intersects the second field mirror with an incidence angle of less than 25°.
摘要:
There is provided an illumination system for microlithography. The illumination system includes an optical element having a plurality of field raster elements, a plane in which a field is illuminated, and a grazing incidence mirror situated in a light path from the optical element to the plane, after the optical element. The illumination system has no other grazing incidence mirror in the light path, after the optical element and before the plane.
摘要:
There is provided a projection objective for a projection exposure apparatus that has a primary light source for emitting electromagnetic radiation having a chief ray with a wavelength ≦193 nm. The projection objective includes an object plane, a first mirror, a second mirror, a third mirror, a fourth mirror; and an image plane. The object plane, the first mirror, the second mirror, the third mirror, the fourth mirror and the image plane are arranged in a centered arrangement around a common optical axis. The first mirror, the second mirror, the third mirror, and the fourth mirror are situated between the object plane and the image plane. The chief ray, when incident on an object situated in the object plane, in a direction from the primary light source, is inclined away from the common optical axis.
摘要:
There is provided an illumination system for microlithography with wavelengths≦193 nm. The illumination system includes a primary light source, a first optical component, a second optical component, an image plane, and an exit pupil. The first optical component transforms the primary light source into a plurality of secondary light sources that are imaged by the second optical component in the exit pupil. The first optical component includes a first optical element having a plurality of first raster elements that are imaged into the image plane producing a plurality of images being superimposed at least partially on a field in the image plane. The first raster elements that are imaged into the image plane are illuminated almost completely.
摘要:
There is provided an illumination system that includes (a) a light source that emits light having a wavelength ≦193 nm, where the light provides a predetermined illumination in a plane distant from the light source and defines a used area in the plane, and (b) a sensor, situated in or near the plane, for detecting light outside the used area.
摘要:
There is provided an optical element for forming an arc-shaped field in a field plane of an illumination system for light having a wavelength of less than or equal to about 193 nanometers. The optical element includes a plurality of mirror surfaces, each having an array of aspherical reflecting elements. The array of aspherical reflecting elements has a plurality of cylindrical mirrors with aspheric curvature in an x-direction. The plurality of mirror surfaces form a nested mirror and includes a pair of adjacent mirror surfaces that have a spacing dspace therebetween. The arc-shaped field has an axis of symmetry. The field plane is defined by a vector in a y-direction that is parallel to the axis of symmetry, and a vector in the x-direction, which is orthogonal to the axis of symmetry.
摘要:
There is provided a projection objective for a projection exposure apparatus that has a primary light source for emitting electromagnetic radiation having a chief ray with a wavelength ≦193 nm. The projection objective includes an object plane, a first mirror, a second mirror, a third mirror, a fourth mirror; and an image plane. The object plane, the first mirror, the second mirror, the third mirror, the fourth mirror and the image plane are arranged in a centered arrangement around a common optical axis. The first mirror, the second mirror, the third mirror, and the fourth mirror are situated between the object plane and the image plane. The chief ray, when incident on an object situated in the object plane, in a direction from the primary light source, is inclined away from the common optical axis.