摘要:
A wafer having a plurality of areas is subjected to multiple exposures or a stitching exposure with a plurality of mask patterns being interchanged. A plurality of wafers are sequentially exposed to the plurality of mask patterns, with one wafer being replaced with a next wafer. When the one wafer is replaced with the next wafer, the next wafer is exposed to the mask pattern last used, prior to the replacement. When one mask pattern is interchanged with a next mask pattern, an area of the one wafer, last exposed to the one mask pattern, is first exposed to the next mask pattern.
摘要:
There is provided an absorption refrigerator comprising a liquid-film type plate heat exchanger structure,. which is improved in terms of installation while maintaining the height of the refrigerator at a practical level. In an absorption refrigerator utilizing a liquid-film type plate heat exchanger for an absorber (A), an evaporator (E), a regenerator (G) and a condenser (C), all the absorber, the evaporator, the regenerator and the condenser, each comprising the liquid-film type plate heat exchanger, are arranged in a horizontal direction. The evaporator, the absorber, the regenerator and the condenser are accommodated in a single can body (1), and the evaporator and the absorber, and the regenerator and the condenser are, respectively, accommodated in different chambers arranged in a lateral direction, which are divided by a partition wall (16) provided in the can body. The evaporator and the absorber, and the regenerator and the condenser may be, respectively, accommodated in different can bodies arranged in the lateral direction.
摘要:
A projection exposure apparatus includes a projection lens system for projecting an image of a pattern of an original on a substrate having a photosensitive layer, by using a sensitizing beam; a first detection optical system for detecting a mark of the substrate through the projection lens system and with a first non-sensitizing beam, the first detection optical system producing first information related to the position of the mark; a second detection optical system for detecting the mark of the substrate without the projection lens system and with a second nonsensitizing beam having a bandwidth broader than that of the first non-sensitizing beam, the second detection optical system producing second information related to the position of the mark; and a detector for detecting an error included in the first information, by using the first and second information.
摘要:
A method and an apparatus for exposing an object with a pulsed laser beam. The exposure of one shot (one exposure area) is achieved by a plurality of pulse exposures with laser light in a corresponding number of pulses, as the result of which any fluctuations or errors in the outputs of the pulses are substantially compensated so that correct exposure of each shot is assured. In another aspect, the amounts of exposures by the plural pulses for the one shot exposure are integrated and the integrated amount of exposure is compared with a correct or desired amount of exposure. On the basis of the result of comparison, an additional pulse exposure is effected in accordance with the degree of under exposure.
摘要:
Disclosed is an exposure apparatus for printing a pattern of a reticle on different shot areas of the wafer in a step-and-repeat manner. In the disclosed apparatus, an image of an alignment mark of the reticle is printed, by use of a projection lens system, on each of some shot areas of the wafer which are selected as the subject of detection. By this, a latent image of the reticle mark is formed on each of the selected shot areas. The latent image of the reticle mark is detected by a microscope which may be a phase contrast microscope and, from the results of detection concerning all the latent images of the reticle mark, a reference (correction) grid representing the coordinate positions of all the shot areas of the wafer is prepared and stored. In accordance with the stored reference grid, the stepwise movement of the wafer is controlled at the time of the step-and-repeat exposures of the wafer. This assures improved throughput of the apparatus. Further, use of the phase contrast microscope for the detection of the latent image of the reticle mark ensures further improvement in the alignment accuracy.
摘要:
A projection exposure apparatus including a mask stage for supporting a mask, a wafer stage for supporting a wafer, and a projection optical system for projecting, on the wafer, an image of a circuit pattern of the mask, is disclosed. There are provided a surface position detecting system for detecting position of a surface of the water with respect to a direction of an optical axis of the projection optical system, an adjusting device for adjusting an interval between the wafer and the projection optical system, to position the wafer surface at a focus position of the projection optical system, and an outputting portion operable to direct a light beam to a reflection surface, provided at a predetermined site on the wafer stage, and to receive reflection light coming from the reflection surface through the projection optical system, the outputting portion producing a signal corresponding to a positional relationship between the reflection surface and the focus position of the projection optical system. A focus position detecting system detects the focus position of the projecting optical system, on the basis of the signal from the outputting portion, and a control system controls to the adjusting device on the basis of an output of the focus position detecting system and an output of the surface position detecting system.
摘要:
An apparatus usable with an object having surfaces, for examining the states of the surfaces, includes on irradiating system for irradiating the surfaces of the object with a single light beam, and a plurality of light-receiving systems provided in association with the surfaces of the object, respectively, the plural light-receiving systems being arranged to receive light scatteringly reflected from the surfaces of the object, respectively, and to produce outputs corresponding to the states of the surfaces of the object, respectively.
摘要:
An exposure apparatus for use in the manufacture of semiconductor devices, for transferring an integrated circuit pattern of a reticle onto a semiconductor wafer by use of a projection lens optical system. A portion of the pattern of the reticle is irradiated with a light beam, and the light beam is scanningly deflected so that the whole of the pattern of the reticle is scanned with the light beam, whereby the pattern of the reticle is transferred onto the wafer. For compensation of a curvature of field of the projection lens optical system, the wafer is displaced in the direction of an optical axis of the projection lens optical system in accordance with the position of scan, on the reticle, whereby a high resolving power is assured over the entire surface of the reticle pattern. This allows enlargement of the pattern area of the reticle.
摘要:
A reflecting optical system including a concave mirror and a convex mirror having opposing reflecting surfaces and disposed coaxially with each other. The reflecting optical system is provided with aspherical lens portions disposed between an object field and the concave mirror and between the concave mirror and an image field, respectively, to achieve a wider superior imaging region of arcuate shape.