摘要:
An exposure apparatus comprises a light source, a mask plate having an exposure pattern area section and an alignment/reflection area section, a projection lens, a movable stage for holding a workpiece having a workpiece alignment mark, an alignment control and a driver for the movable stage. Before the exposure pattern area section is illuminated by the light source to be projected through the projection lens onto the workpiece, the workpiece is properly aligned with the mask. Alignment between the mask plate and the workpiece is performed by the effective use of the alignment/reflection area section specifically arranged and having a specific structure. The alignment/reflection area section is on that surface of the mask plate which does not face the light source and includes a reflection portion for conducting light from another light source to the workpiece and conducting light scattered from the workpiece and passing through the projection lens to the alignment control and a mask alignment mark portion of providing, when illuminated, an image of the mask alignment mark portion to the alignment control so that it detects the positional relation between the mask alignment mark portion and the workpiece alignment mark and produces a control signal for achieving alignment between the mask plate and the workpiece.
摘要:
In an alignment detection optical system designed to observe an alignment pattern of a mask and an image of an alignment pattern of a wafer formed on the alignment pattern of the mask by a projection lens in a projection type aligner, there is provided a spatial filter designed to select only the reflected light having a desired reflection angle from the light reflected by the alignment pattern composed of steps formed on a surface of the wafer.
摘要:
A semiconductor focusing exposure apparatus in which an opposite face of a mask to a face to be illuminated by exposure light is illuminated with alignment light so that the light reflected from said opposite face may be used for alignment and which is equipped with a second moving arrangement which is separate from a moving arrangement for an x-y moving table supporting a wafer, for aligning the mask and the wafer in an orthogonal direction with respect to the optical axis of a focusing lens.Moreover, the center of the flux of alignment pattern light for illuminating the wafer is made incident upon a line of intersection on which a plane containing the optical axis of an alignment optical system and the optical axis of said focusing lens and the incident plane of said focusing lens intersect with each other.Still moreover, the optical path of the alignment light beam is aligned in parallel with a straight line joining an alignment mark formed on the diffraction pattern and the center of the entrance pupil of said focusing lens.
摘要:
A method of inspecting a DNA chip and an apparatus therefor that allow a picture to be reconstructed in the following steps: A plurality of irradiation spots are formed on a DNA probe array mounted on a stage. Then, the stage is displaced in X, Y directions so as to execute a scanning, thereby irradiating substantially all the entire surface of the DNA probe array. Next, a plurality of emitted fluorescent lights, which are generated from the plurality of irradiation spot portions on the DNA probe array, are converged and are then detected simultaneously by multi detectors. Finally, a data processing apparatus processes the detected signals, thereby reconstructing the picture.
摘要:
A reduction projection type aligner in a reduction projection exposing device for exposing a circuit pattern on a mask through a reduction projection lens onto a wafer by the step and repeat of the wafer, which comprises: a light source for irradiating coherent irradiation light, a reflection mirror for reflecting the coherent irradiation light irradiated from the light source, a detection optical system for detecting an interference pattern by optically causing interference between an alignment pattern reflection light obtained by entering the coherent irradiation light irradiated from the light source through the reduction projection lens to the alignment pattern portion of the wafer, which is then reflected at the alignment pattern portion and then passed through the reduction projection lens and a reflection light reflected at the reflection mirror, and means for aligning a mask and a wafer relatively by detecting the position of the wafer by the video image signals in the interference pattern detected by the detection optical system.
摘要:
An enlargement projection type exposure method includes the steps of deforming the shape of a substrate so as to eliminate distortion in an enlarged image of the pattern, which is formed on a mask and projected onto the substrate through an enlargement projection system. The pattern is exposed with the use of an enlargement projection optical system. An apparatus for the method comprises an enlargement projection optical system for enlarging the pattern formed on the mask, and a substrate deforming device for deforming by adsorption the substrate in shape so as to eliminate the distortion in the enlarged image of the pattern through the enlargement projection optical system.
摘要:
A reduction projection system alignment method for detecting the positions of an alignment pattern on a reticle and an alignment pattern on a wafer projected onto a reticle by a reduction projection lens so as to relatively align the reticle and wafer. This method comprises providing spatial images emanating from patterns on the reticle and wafer surfaces as alginment patterns of at least one of the reticle and wafer, and detecting the alignment patterns of the reticle and wafer by the same detection optical system using lights which are different in the wavelength from that of an exposure light and different from each other between the reticle and wafer. An apparatus for performing this method is also disclosed.
摘要:
A wafer is aligned by using an alignment light having a longer wavelength than an exposure light. Exposure and alignment are effected through a common reduction lens. A wavefront aberration caused by the use of the long wavelength alignment light is compensated by a hologram. Thus, an alignment precision is improved without exposing a resist layer to a light.
摘要:
An illumination apparatus is disclosed which is suitable for use in a projection/exposure system for projecting an image of a circuit pattern of a reticle on a semiconductor wafer through a projection lens. The illumination apparatus includes an excimer laser for emitting a pulsed laser beam, an optical system for illuminating the reticle with a plurality of laser pulses emitted from the excimer laser so that laser pulses having passed through the reticle impinge on the semiconductor wafer in different directions through the projection lens, and a light intensity control device for controlling the light intensity of each of the laser pulses so that the laser pulses equally contribute to the reaction of a light sensitive material which is provided on the semiconductor wafer, with light.
摘要:
A method and a system for pattern detection are disclosed in which a laser beam high in directivity is emitted from a laser beam source, the laser beam emitted from the laser beam source is irradiated on an uneven pattern to be detected on an object, the light component of a frequency corresponding to the cut-off frequency of an objective lens is removed from the light reflected from the object when an image of the pattern on the object is formed through an objective lens, the optical image thus formed is received by a photoelectric converting device for producing a signal waveform representing the pattern free of a signal of the frequency corresponding to the cut-off frequency, and the pattern is detected from a signal produced from the photoelectric converting device.