摘要:
An illumination system includes an optical system, an optical integrator and a condenser. The optical system collects light from a light source and includes a mirror for reflecting the light. The mirror has an ellipsoidal reflection surface of a shape being out of axial symmetry for defining an aperture of rectangular or semicircular shape as seen in an optical axis direction. The optical integrator produces plural light beams by use of light from the optical system and includes an array of condensing elements having a light entrance surface of rectangular shape as seen in the optical axis direction. A lengthwise direction of the rectangular-shaped or semicircular-shaped aperture of the ellipsoidal reflection surface corresponds to a lengthwise direction of the rectangular-shape light entrance surface of the condensing elements. The condenser illuminates a surface to be illuminated by use of the plural light beams.
摘要:
An illumination optical system comprises a first polarization control unit which is located between a light source and a pupil of an illumination optical system, and a second polarization control unit which is located between the first polarization control unit and the pupil, wherein a region on the pupil includes a plurality of partial regions which are classified into a first group including a partial region having a largest area, and a second group including a partial region different from the partial region having the largest area, and the second polarization control unit controls a polarization state in the partial region which belongs to only the second group.
摘要:
An exposure apparatus includes an illumination optical system for illuminating an reticle using light from a light source, a projection optical system for projecting a pattern of the reticle onto a substrate, and a variable stop having an opening for regulating an illumination area on the substrate, said variable stop is arranged near a position conjugate with the substrate, wherein a position of the variable stop is variable along an optical axis of the illumination optical system or an optical axis of the projection optical system.
摘要:
A method of inspecting a curved surface of a workpiece by a surface inspecting apparatus provided with a projecting device for illuminating the workpiece surface to be inspected with detection light, a detecting device for receiving and detecting the light reflected from the workpiece surface, and a condensing optical system for causing the reflected light to converge on a light-receiving surface of the detecting device. According to the method, the surface inspecting apparatus is successively displaced along the workpiece surface and the reflected light is detected by the detecting device. Further, image data obtained from the detecting device is held and binary digitized. It is determined whether or not the workpiece surface to be inspected is planar. If it is not planar, then the digitized image data is processed for dilation and erosion. Thus, when the workpiece surface is curved, faulty or defective spots can be reliably detected. If the workpiece surface is planar, the time required to process an image can be shortened.
摘要:
An illumination optical system comprises a first polarization control unit which is located between a light source and a pupil of an illumination optical system, and a second polarization control unit which is located between the first polarization control unit and the pupil, wherein a region on the pupil includes a plurality of partial regions which are classified into a first group including a partial region having a largest area, and a second group including a partial region different from the partial region having the largest area, and the second polarization control unit controls a polarization state in the partial region which belongs to only the second group.
摘要:
An illumination optical system for illuminating a target surface using light from a light source, includes a sensor for detecting a light intensity of the light, a light splitter for splitting part of the light, and an optical element, arranged between the light source and the light splitter, for transmitting the light, and for reflecting the part of the light that has been split by the light splitter, towards the sensor.
摘要:
A method of controlling an amount of exposure, in which, when a pattern on a reticle is illuminated by illuminating light from a light source so as to be projected onto a substrate, an amount of light at a position substantially conjugate with a projected area on the substrate is measured and an amount of exposure applied to the substrate is controlled based upon a result of this measurement. The position at which the amount of light is measured is a position substantially conjugate with an off-optical-axis position in the projected area on the substrate.
摘要:
A lithographic apparatus includes: a light-shielding plate which includes, on an edge thereof, an arc overlapping with a circular boundary line that defines a region onto which the pattern is transferred and is located inside an outer periphery of a substrate, and blocks the light to prevent the light from being incident on an outer peripheral region located outside the circular boundary line; a first driving unit which rotates the light-shielding plate about an axis parallel to an optical axis of the irradiation system; and a second driving unit which linearly drives the light-shielding plate within a plane perpendicular to the optical axis.
摘要:
A sequence control portion of a control program is configured to execute simulation for one period to generate an execution result related to the sequence control portion. A motion control portion is configured to execute simulation for one period to generate an execution result related to the motion control portion. A control period number is then increment updated. Whether or not a resumable control period is determined, and if determined as the resumable control period, content of a resuming data buffer (828) updated in the previous control period is saved in a resuming data storage section (826).
摘要:
An exposure apparatus comprises an illumination optical system and a projection optical system. The illumination optical system includes an optical integrator configured to emit a plurality of light fluxes from an exit surface thereof, a diffraction optical element configured to form a predetermined light intensity distribution on an incident surface of the optical integrator, and a polarization optical element configured to adjust a polarization state of the incident light. The polarization optical element has a pattern with which the polarization optical element functions as a birefringent element, the pattern changing in density between a first direction and a second direction perpendicular to the first direction, and having a sub wavelength structure having a cycle not more than a wavelength of the light from the light source, and the polarization optical element is arranged near or on the incident surface on which the diffraction optical element forms the light intensity distribution.