摘要:
In calibration of overlay performance of an immersion lithographic apparatus, two sets of overlay data are obtained from exposures carried out using normal and reversed meanders. The two data sets can then be used to eliminate effects due to wafer cooling.
摘要:
In calibration of overlay performance of an immersion lithographic apparatus, two sets of overlay data are obtained from exposures carried out using, for example, normal and reversed meanders. The two data sets can then be used to eliminate effects due to substrate cooling.
摘要:
A lithographic apparatus having an illumination system for providing a projection beam of radiation; an article support member for supporting an article to be placed in a beam path of the projection beam of radiation on the article support; and a clamp for providing a clamping pressure for clamping the article against the article support during projection. The article support member includes a section that is trimmed for locally adjusting a clamping pressure.
摘要:
A lithographic projection apparatus is disclosed. The apparatus includes a radiation system for providing a beam of radiation and a substrate holder for supporting a substrate to be placed in a beam path of the beam of radiation. The substrate holder includes a plurality of first protrusions, the distal ends thereof defining a first contact surface for contacting the substrate, and a plurality of second protrusions, the distal ends thereof defining a second contact surface for supporting the substrate. The second protrusions are arranged for preventing sticking of the substrate to the first contact surface during release of a clamping pressure so that (1) the substrate contacts the first and second contact surfaces when the substrate is clamped against the substrate holder, and (2) the substrate is supported by the second contact surface and distanced from the first contact surface when the substrate is not clamped.
摘要:
An immersion lithographic apparatus has a plurality of substrate holders arranged to hold substrates, each substrate holder having a conduit therein for passing a temperature control fluid. The thermal responses of the different substrate holders are calibrated and flow rates calculated and used so that all the holders return to a predetermined temperature in the same time.
摘要:
A lithographic projection apparatus having a radiation system for providing a projection beam of radiation; a support structure for supporting a patterning device, the patterning device serving to pattern the projection beam according to a desired pattern; a substrate holder for holding a substrate the substrate holder provided with a device to provide a holding force for pressing the substrate against the substrate holder; a releasing structure constructed and arranged to eject the substrate from the holder against the holding force; and a projection system for projecting the patterned beam onto a target portion of the substrate. The lithographic projection apparatus may include a controller for controlling the releasing structure so as to release the substrate from the holder with a release force that is reduced prior to final release.
摘要:
An electrostatic clamp assembly for a lithographic apparatus is provided. The clamp assembly includes an electrostatic clamp structured to clamp an article against an article support structure during projection of a beam of radiation, and a controller structured to control at least one of the clamp and a backfill gas pressure to release the article from the article support structure by use of the backfill gas pressure.
摘要:
A lithographic apparatus is disclosed. The apparatus includes an illumination system for conditioning a beam of radiation, and an article support for supporting a substantially flat article to be placed in the beam of radiation. The article support includes a plurality of supporting protrusions for supporting the article, and at least one protective member located near a boundary of the supporting protrusions for protecting at least a boundary portion of the supporting protrusions during release of the article. The apparatus also includes a releasing device for releasing said article from said article support.
摘要:
A movable carriage for moving an article support member in a lithographic apparatus is provided. The article support member is constructed and arranged to move and support an article to be placed in a beam path of the lithographic apparatus. The carriage includes a compartmented composite structure.
摘要:
A lithographic apparatus includes an illumination system for providing a beam of radiation, an article support for supporting a flat article to be placed in a beam path of the beam of radiation on the article support, a backfill gas feed arranged in the article support for feeding backfill gas to a backside of the article when supported by the article support, and a clamp for clamping the article against the article support during projection. According to one aspect of the invention, the apparatus includes a controller for controlling the clamp and/or the backfill gas feed pressure so as to release the clamp prior to reducing the backfill gas feed pressure.