摘要:
A projection optical system forms an image of an object in a first plane onto a second plane. The projection optical system has an optical element group including at least one refractive member and plural reflective members, and a plurality of lens-barrel units holding the optical element group divided into a plurality of respective groupings. The reflective members are all held by a single lens-barrel unit of the plurality of lens-barrels units.
摘要:
A precision assembly (210) for positioning a device (226) includes a stage (260) that retains the device (226), a dual mover assembly (228) that moves the stage (260), and the device (226) along a movement axis (266), a measurement system (222) and a control system (224). The dual mover assembly (228) includes a first mover (262) that moves the stage (260) along the movement axis (266) and a second mover (264) that moves the device (226) along the movement axis (266). The second mover (264) is rigidly coupled to the first mover (262) so that movement of the first mover (262) results in movement of the second mover (264). Further, the total output of the dual mover assembly (228) along the movement axis (266) is equal to the sum of the movement of the first mover (262) and the movement of the second mover (264). The measurement system (222) measures a movement position along the movement axis (266). The control system (224) controls the dual mover assembly (228) utilizing the movement position. The control system (224) is designed to effectively decouple the control of the first mover (262) from the control of the second mover (264). Further, the control system (224) includes a quantization feedforward loop.
摘要:
A reflection type illumination optical apparatus, which guides an exposure light to a reticle surface via a curved mirror, a concave mirror, etc. includes a vacuum chamber which accommodates the curved mirror, the concave mirror, etc; and a subchamber which is arranged in the vacuum chamber and which accommodates the curved mirror. The subchamber has openings through which the exposure light coming into the curved mirror and the exposure light exiting from the curved mirror pass, respectively. Each of the openings is arranged in the vicinity of a position at which the cross-sectional area of the light flux is smallest. It is possible to decrease the amount of adhesion of minute particles such as debris to the reflecting optical element, without unnecessarily enhancing the ability of the vacuum gas discharge mechanism.
摘要:
A flange portion is provided to at least a part of the periphery at the center position in the direction of the optical axis of a lens. The lens is held with clamping members and a lens holding metallic part, with the flange portion pressed by the clamping members. The portion where the flange portion is provided, suffers no compressive strain and tensile strain due to the bending of the lens, and is a part of the periphery of a neutral plane, which is the farthest plane from the optical surface of the lens. Therefore, the influence of the clamping force on the flange portion acting on other portions of the lens is reduced to the utmost, and the deformation of the optical surface due to the force acting on the flange portion is reduced to a minimum. As a result, the deterioration of the optical properties of the lens can be suppressed to the utmost.
摘要:
An exposure apparatus includes an illumination optical system that guides illumination light to a mask; a projection optical system that projects the pattern irradiated with the illumination light, onto a substrate; and a supporting device that integrally suspendingly supports at least part of the illumination optical system and the projection optical system, with a supporting member having a flexible structure.
摘要:
An optical member cooling apparatus for cooling an optical member such as a mirror. The optical member cooling apparatus includes a cooling member fixed to the rear surface of the mirror by an engagement mechanisms. The rear surface of the mirror and the contact surface of the cooling mirror have a high flatness. A locking portion including a groove and an extended portion is formed in the rear surface of the mirror. A shaft of the engagement mechanism is hooked to the extended portion of the locking portion. The engagement member is urged toward the cooling member by a spring.
摘要:
An illumination optical apparatus which illuminates an illumination objective surface with an exposure light includes: an illumination optical system having a curved mirror and a concave mirror and defining a position substantially conjugate with the illumination objective surface between the curved and concave mirrors; and a second aperture plate separating a space in which the curved mirror is arranged and a space in which the concave mirror is arranged into mutually different vacuum environments or pressure-reduced environments, and having an aperture through which the exposure light passes, the aperture being arranged at a position at which a cross-sectional area of the exposure light is smallest, or in the vicinity of the position. It is possible to decrease the amount of passage of minute particles such as debris in relation to any downstream-side optical system.
摘要:
“Hexapod” mountings are disclosed for use with optical elements. An exemplary mounting includes a base, a platform that is movable relative to the base, and six legs having nominally identical length. Three pairs of legs, having substantially equal stiffness, extend between the base and platform and support the platform relative to the base. In each pair of legs, respective first ends are coupled together in a Λ-shaped manner forming a respective apex. Respective second ends are splayed relative to the apex, desirably forming an angle of substantially 109.5° at the apex. The apices are mounted equidistantly from each other on a circle on the platform. The respective second ends of the pairs of legs are mounted at respective locations on a circle on the base. The axes of each pair of legs define a respective leg plane substantially perpendicular to the base plane. Each leg has an actuator that, when energized, changes a length of the respective leg. Coordinated energization of the actuators in selected legs produces a desired movement of the platform relative to the base in all six degrees of freedom of motion.
摘要:
There is provided is an optical member-holding apparatus which can hold a plurality of optical members of two different optical systems, even when the optical members exist in a common barrel in a mixed manner, such that the relative positions between the optical members can be easily adjusted; and which holds a mirror in a projection optical system and a mirror in an illumination optical system and includes a barrel unit, an inner ring holding the mirror, a holding member holding the mirror, a support plate attached to the barrel unit, and a holding-supporting mechanism attached to the support plate and adjusting the relative position of the mirror to the mirror.
摘要:
An illumination optical apparatus which illuminates an illumination objective surface with an exposure light includes: an illumination optical system having a curved mirror and a concave mirror and defining a position substantially conjugate with the illumination objective surface between the curved and concave mirrors; and a second aperture plate separating a space in which the curved mirror is arranged and a space in which the concave mirror is arranged into mutually different vacuum environments or pressure-reduced environments, and having an aperture through which the exposure light passes, the aperture being arranged at a position at which a cross-sectional area of the exposure light is smallest, or in the vicinity of the position. It is possible to decrease the amount of passage of minute particles such as debris in relation to any downstream-side optical system.