Projection exposure system
View Patent ↗A projection exposure system, intended in particular for microlithography, is used for generating, in an image plane, an image of a mask arranged in an object plane. The projection exposure system has a light source emitting projection light and projection optics arranged between the mask and the image. Starting from the mask, the following are arranged in the beam path of the projection optics: a first group of optical components with an overall positive refractive power; a second group of optical components with an overall negative refractive power; a third group of optical components with an overall positive refractive power; a fourth group of optical components with an overall negative refractive power, and, a fifth group of optical components with an overall positive refractive power. At least three optical subgroups having at least one optical component can be displaced along the optical axis of the projection optics. The first optical subgroup comprises the mask or at least one optical component from the first group of optical components. The second optical subgroup comprises at least one optical component from the second or the third group of optical components. The third optical subgroup comprises at least one optical component from the third or the fourth group of optical components. With such subgroups, efficient imaging error correction of the projection optics is possible.
1. An optical system, comprising:
a light source capable of emitting light;
projection optics having an optical axis, the projection optics comprising:
a first group of optical components with an overall positive refractive power, the first group of optical components including at least one component that is displaceable along the optical axis of the projection optics;
a second group of optical components with an overall negative refractive power; and
a third group of optical components with an overall positive refractive power;
an instrument capable of adjusting a wavelength of light emitted by the light source; and
a mask that is displaceable along the optical axis of the projection optics so that during use of the optical system the position of the mask along the optical axis can be selected to compensate for imaging errors of the projection optics,
wherein the optical system is a microlithography projection exposure system, and the system is configured so that, during use, the projection optics can image the mask onto a light sensitive surface.
2. The system of claim 1 , wherein at least one component from the second group of optical components is displaceable along the optical axis of the projection optics.
3. The system of claim 2 , wherein at least one component from the third group of optical components is displaceable along the optical axis of the projection optics.
4. The system of claim 1 , wherein at least one component from the third group of optical components is displaceable along the optical axis of the projection optics.
5. The system of claim 1 , further comprising a fourth group of optical components with an overall negative refractive power.
6. The system of claim 5 , further comprising a fifth group of optical components with an overall positive refractive power.
7. An optical system, comprising:
projection optics having an optical axis, the projection optics comprising:
a first group of optical components with an overall positive refractive power, the first group of optical components including at least one component that is displaceable along the optical axis of the projection optics;
a second group of optical components with an overall negative refractive power; and
a third group of optical components with an overall positive refractive power;
an instrument capable of adjusting a wavelength of light; and
a mask that is displaceable along the optical axis of the projection optics so that during use of the optical system the position of the mask along the optical axis can be selected to compensate for imaging errors of the projection optics,
wherein the optical system is a microlithography projection exposure system, and the system is configured so that, during use, the projection optics can image the mask onto a light sensitive surface.
8. The system of claim 7 , wherein at least one component from the second group of optical components is displaceable along the optical axis of the projection optics.
9. The system of claim 8 , wherein at least one component from the third group of optical components is displaceable along the optical axis of the projection optics.
10. The system of claim 7 , wherein at least one component from the third group of optical components is displaceable along the optical axis of the projection optics.
11. The system of claim 7 , further comprising a fourth group of optical components with an overall negative refractive power.
12. The system of claim 11 , further comprising a fifth group of optical components with an overall positive refractive power.
13. An optical system, comprising:
a light source capable of emitting light;
projection optics having an optical axis, the projection optics comprising:
a first group of optical components with an overall positive refractive power, the first group of optical components including at least one component that is displaceable along the optical axis of the projection optics;
a second group of optical components with an overall negative refractive power, the second group of optical components including at least one component that is displaceable along the optical axis of the projection optics; and
a third group of optical components with an overall positive refractive power; and
an instrument capable of adjusting a wavelength of light emitted by the light source,
wherein the optical system is a microlithography projection exposure system, and the system is configured so that, during use, the projection optics can image a mask onto a light sensitive surface.
14. The system of claim 13 , further comprising a mask that is displaceable along the optical axis of the projection optics.
15. The system of claim 13 , wherein at least one component from the third group of optical components is displaceable along the optical axis of the projection optics.
16. The system of claim 13 , further comprising a fourth group of optical components with an overall negative refractive power.
17. The system of claim 16 , further comprising a fifth group of optical components with an overall positive refractive power.