Target trajectory metrology in an extreme ultraviolet light source

    公开(公告)号:US10681797B2

    公开(公告)日:2020-06-09

    申请号:US16552760

    申请日:2019-08-27

    Abstract: A method is described for measuring a moving property of a target. The method includes: forming a remaining plasma that at least partially coincides with an extended target region, the remaining plasma being a plasma formed from an interaction between a prior target and a prior radiation pulse in a target space; releasing a current target along a trajectory toward the target space that is at least partly overlapping the extended target region; determining one or more moving properties of the current target when the current target is within the extended target region and after a prior and adjacent target has interacted with a prior radiation pulse in the target space; and if any of the determined one or more moving properties of the current target are outside an acceptable range, then adjusting one or more characteristics of a radiation pulse directed toward the target space.

    Reducing an optical power of a reflected light beam

    公开(公告)号:US10606096B2

    公开(公告)日:2020-03-31

    申请号:US15901976

    申请日:2018-02-22

    Abstract: A system for an extreme ultraviolet (EUV) light source includes a light-generation system configured to emit one or more light beams onto a beam path; one or more optical amplifiers, each of the one or more amplifiers including a gain medium on the beam path, each gain medium being configured to amplify the one or more light beams to produce one or more amplified light beams; and one or more diffractive optical elements on the beam path, where each of the one or more diffractive optical elements has a plurality of focal lengths, and each focal length of the diffractive optical element is associated with a particular polarization state.

    TARGET TRAJECTORY METROLOGY IN AN EXTREME ULTRAVIOLET LIGHT SOURCE

    公开(公告)号:US20190069386A1

    公开(公告)日:2019-02-28

    申请号:US16174464

    申请日:2018-10-30

    Abstract: A method is described for measuring a moving property of a target. The method includes: forming a remaining plasma that at least partially coincides with an extended target region, the remaining plasma being a plasma formed from an interaction between a prior target and a prior radiation pulse in a target space; releasing a current target along a trajectory toward the target space that is at least partly overlapping the extended target region; determining one or more moving properties of the current target when the current target is within the extended target region and after a prior and adjacent target has interacted with a prior radiation pulse in the target space; and if any of the determined one or more moving properties of the current target are outside an acceptable range, then adjusting one or more characteristics of a radiation pulse directed toward the target space.

    Target trajectory metrology in an extreme ultraviolet light source

    公开(公告)号:US10681796B2

    公开(公告)日:2020-06-09

    申请号:US16174464

    申请日:2018-10-30

    Abstract: A method is described for measuring a moving property of a target. The method includes: forming a remaining plasma that at least partially coincides with an extended target region, the remaining plasma being a plasma formed from an interaction between a prior target and a prior radiation pulse in a target space; releasing a current target along a trajectory toward the target space that is at least partly overlapping the extended target region; determining one or more moving properties of the current target when the current target is within the extended target region and after a prior and adjacent target has interacted with a prior radiation pulse in the target space; and if any of the determined one or more moving properties of the current target are outside an acceptable range, then adjusting one or more characteristics of a radiation pulse directed toward the target space.

    TARGET TRAJECTORY METROLOGY IN AN EXTREME ULTRAVIOLET LIGHT SOURCE

    公开(公告)号:US20190387603A1

    公开(公告)日:2019-12-19

    申请号:US16552760

    申请日:2019-08-27

    Abstract: A method is described for measuring a moving property of a target. The method includes: forming a remaining plasma that at least partially coincides with an extended target region, the remaining plasma being a plasma formed from an interaction between a prior target and a prior radiation pulse in a target space; releasing a current target along a trajectory toward the target space that is at least partly overlapping the extended target region; determining one or more moving properties of the current target when the current target is within the extended target region and after a prior and adjacent target has interacted with a prior radiation pulse in the target space; and if any of the determined one or more moving properties of the current target are outside an acceptable range, then adjusting one or more characteristics of a radiation pulse directed toward the target space.

    Target trajectory metrology in an extreme ultraviolet light source

    公开(公告)号:US10149375B2

    公开(公告)日:2018-12-04

    申请号:US15265373

    申请日:2016-09-14

    Abstract: A method is described for measuring a moving property of a target. The method includes: forming a remaining plasma that at least partially coincides with an extended target region, the remaining plasma being a plasma formed from an interaction between a prior target and a prior radiation pulse in a target space; releasing a current target along a trajectory toward the target space that is at least partly overlapping the extended target region; determining one or more moving properties of the current target when the current target is within the extended target region and after a prior and adjacent target has interacted with a prior radiation pulse in the target space; and if any of the determined one or more moving properties of the current target are outside an acceptable range, then adjusting one or more characteristics of a radiation pulse directed toward the target space.

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