摘要:
An aberration detector for a lithographic apparatus is used. An imaging device captures an image of at least one pinhole feature of a target projected onto the imaging device by the projection system of the lithographic apparatus at two different locations separated in a direction parallel to the optical axis of the projection system. A controller obtains a representation of the aberration of the projection system from the captured images.
摘要:
A method for detecting radiation. The radiation detector includes a plurality of Faraday cups. Each Faraday cup being provided with a cover. Each cover comprising a window arrangement through which the radiation may pass into the Faraday cup. The window arrangement of each cover being different for each Faraday cup. Each Faraday cup housing a target configured to emit photoelectrons if the radiation is incident upon the target.
摘要:
A method for detecting radiation. The radiation detector includes a plurality of Faraday cups. Each Faraday cup being provided with a cover. Each cover comprising a window arrangement through which the radiation may pass into the Faraday cup. The window arrangement of each cover being different for each Faraday cup. Each Faraday cup housing a target configured to emit photoelectrons if the radiation is incident upon the target.
摘要:
An aberration detector for a lithographic apparatus is used. An imaging device captures an image of at least one pinhole feature of a target projected onto the imaging device by the projection system of the lithographic apparatus at two different locations separated in a direction parallel to the optical axis of the projection system. A controller obtains a representation of the aberration of the projection system from the captured images.
摘要:
A lithographic apparatus includes an illumination system configured to condition a radiation beam; a polarization sensor configured at least in part to couple to a reticle stage, wherein components of the reticle polarization sensor can be loaded and unloaded in the lithographic apparatus in the manner used for conventional reticles. In one configuration an active reticle tool includes a rotatable retarder configured to vary the retardation applied to polarized light received from a field point in the illumination system. In another configuration, a passive reticle tool is configured as an array of polarization sensor modules, where the amount of retardation applied to received light by fixed retarders varies according to position of the polarization sensor module. Accordingly, a plurality of retardation conditions for light received at a given field point can be measured, wherein a complete determination of a polarization state of the light at the given field point can be determined. In another configuration, the polarization sensor is configured to measure the effect of a projection lens on a polarization state of light passing through the projection lens.
摘要:
A radiation detector detects radiation. The radiation detector includes a plurality of Faraday cups. Each Faraday cup being provided with a cover. Each cover comprising a window arrangement through which the radiation may pass into the Faraday cup. The window arrangement of each cover being different for each Faraday cup. Each Faraday cup housing a target configured to emit photoelectrons if the radiation is incident upon the target.
摘要:
A radiation detector detects radiation. The radiation detector includes a plurality of Faraday cups. Each Faraday cup being provided with a cover. Each cover comprising a window arrangement through which the radiation may pass into the Faraday cup. The window arrangement of each cover being different for each Faraday cup. Each Faraday cup housing a target configured to emit photoelectrons if the radiation is incident upon the target.
摘要:
A lithographic apparatus includes an illumination system configured to condition a radiation beam; a polarization sensor configured at least in part to couple to a reticle stage, wherein components of the reticle polarization sensor can be loaded and unloaded in the lithographic apparatus in the manner used for conventional reticles. In one configuration an active reticle tool includes a rotatable retarder configured to vary the retardation applied to polarized light received from a field point in the illumination system. In another configuration, a passive reticle tool is configured as an array of polarization sensor modules, where the amount of retardation applied to received light by fixed retarders varies according to position of the polarization sensor module. Accordingly, a plurality of retardation conditions for light received at a given field point can be measured, wherein a complete determination of a polarization state of the light at the given field point can be determined. In another configuration, the polarization sensor is configured to measure the effect of a projection lens on a polarization state of light passing through the projection lens.
摘要:
A lithographic apparatus includes an illumination system configured to condition a radiation beam; a polarization sensor configured at least in part to couple to a reticle stage, wherein components of the reticle polarization sensor can be loaded and unloaded in the lithographic apparatus in the manner used for conventional reticles. In one configuration an active reticle tool includes a rotatable retarder configured to vary the retardation applied to polarized light received from a field point in the illumination system. In another configuration, a passive reticle tool is configured as an array of polarization sensor modules, where the amount of retardation applied to received light by fixed retarders varies according to position of the polarization sensor module. Accordingly, a plurality of retardation conditions for light received at a given field point can be measured, wherein a complete determination of a polarization state of the light at the given field point can be determined. In another configuration, the polarization sensor is configured to measure the effect of a projection lens on a polarization state of light passing through the projection lens.