摘要:
A projection objective of a microlithographic projection exposure apparatus has a high index refractive optical element with an index of refraction greater than 1.6. This element has a volume and a material related optical property which varies over the volume. Variations of this optical property cause an aberration of the objective. In one embodiment at least 4 optical surfaces are provided that are arranged in at least one volume which is optically conjugate with the volume of the refractive optical element. Each optical surface comprises at least one correction means, for example a surface deformation or a birefringent layer with locally varying properties, which at least partially corrects the aberration caused by the variation of the optical property.
摘要:
A projection objective of a microlithographic projection exposure apparatus has a high index refractive optical element with an index of refraction greater than 1.6. This element has a volume and a material related optical property which varies over the volume. Variations of this optical property cause an aberration of the objective. In one embodiment at least 4 optical surfaces are provided that are arranged in at least one volume which is optically conjugate with the volume of the refractive optical element. Each optical surface comprises at least one correction means, for example a surface deformation or a birefringent layer with locally varying properties, which at least partially corrects the aberration caused by the variation of the optical property.
摘要:
A projection objective of a microlithographic projection exposure apparatus has a high index refractive optical element with an index of refraction greater than 1.6. This element has a volume and a material related optical property which varies over the volume. Variations of this optical property cause an aberration of the objective. In one embodiment at least 4 optical surfaces are provided that are arranged in at least one volume which is optically conjugate with the volume of the refractive optical element. Each optical surface comprises at least one correction means, for example a surface deformation or a birefringent layer with locally varying properties, which at least partially corrects the aberration caused by the variation of the optical property.
摘要:
A projection objective of a microlithographic projection exposure apparatus has a high index refractive optical element (L3) with an index of refraction greater than 1.6. This element (L3) has a volume and a material related optical property which varies over the volume. Variations of this optical property cause an aberration of the objective. In one embodiment at least 4 optical surfaces are provided that are arranged in at least one volume (L3′) which is optically conjugate with the volume of the refractive optical element. Each optical surface comprises at least one correction means, for example a surface deformation or a birefringent layer with locally varying properties, which at least partially corrects the aberration caused by the variation of the optical property.
摘要:
In a method for describing, evaluating and improving optical polarization properties of a projection objective of a microlithographic projection exposure apparatus, the Jones or Stokes vectors are firstly determined at one or more points in the exit pupil of the projection objective. These are then described at least approximately as a linear superposition of predetermined vector modes with scalar superposition coefficients. The optical polarization properties can subsequently be evaluated on the basis of the superposition coefficients.
摘要:
An optical system (1) includes a first optical subsystem (3) with at least a first birefringent optical element (7), and further includes a second optical subsystem (5) with at least a second birefringent optical element (9). Between the first optical subsystem and the second optical subsystem, an optical retarding system (13) with at least a first optical retarding element (15) is arranged, which introduces a retardation of one-half of a wavelength between two mutually orthogonal states of polarization.
摘要:
A method for determining intensity distribution in the focal plane of a projection exposure arrangement, in which a large aperture imaging system is emulated and a light from a sample is represented on a local resolution detector by an emulation imaging system. A device for carrying out the method and emulated devices are also described. The invention makes it possible to improve a reproduction quality since the system apodisation is taken into consideration. The inventive method consists in includes determining the integrated amplitude distribution in an output pupil, combining the integrated amplitude distribution with a predetermined apodization correction and calculating a corrected apodization image according to the modified amplitude distribution.
摘要:
The invention concerns an optical element, in particular for an objective or an illumination system of a microlithographic projection exposure apparatus, including a substrate which for light of a predetermined working wavelength which passes through the substrate causes a first retardation between mutually perpendicular polarization states, and a layer which is epitaxially grown on the substrate and which is made from a material with non-cubic crystal structure, which by virtue of natural birefringence causes a second retardation between mutually perpendicular polarization states, which at least partially compensates for the first retardation caused in the substrate.
摘要:
A method for determining intensity distribution in the focal plane of a projection exposure arrangement, in which a large aperture imaging system is emulated and a light from a sample is represented on a local resolution detector by an emulation imaging system. A device for carrying out the method and emulated devices are also described. The invention makes it possible to improve a reproduction quality since the system apodisation is taken into consideration. The inventive method includes determining the integrated amplitude distribution in an output pupil, combining the integrated amplitude distribution with a predetermined apodization correction and calculating a corrected apodization image according to the modified amplitude distribution.
摘要:
The invention concerns a method for operating a projection exposure apparatus to project the image of a structure of an object (5) arranged in an object plane (6) onto a substrate (10) arranged in an image plane (8). The object (5) is illuminated with light of an operating wavelength of the projection exposure apparatus according to one of several adjustable exposure modes. The light produces changes in at least one optical element (9) of the projection exposure apparatus, by which the optical properties of the projection exposure apparatus are influenced. The operation of the projection exposure apparatus makes allowance for the influencing of the optical properties of the projection exposure apparatus or a quantity dependent on the former, being calculated approximately on the basis of the exposure mode used and the structure of the object (5).