摘要:
A projection exposure apparatus is equipped with an illumination system, a reticle, a projection objective and an image plane. Interstitial spaces between the individual elements of the apparatus are open to the ambient space. A gas purge device which carries a stream of noble gas or nitrogen is arranged in at least one of the interstitial spaces. The gas purge device is of a shape and size so that one or more interstitial spaces are at least to a large extent sealed off from the ambient space surrounding the projection apparatus.
摘要:
A projection exposure apparatus is equipped with an illumination system, a reticle, a projection objective and an image plane. Interstitial spaces between the individual elements of the apparatus are open to the ambient space. A gas purge device which carries a stream of noble gas or nitrogen is arranged in at least one of the interstitial spaces. The gas purge device is of a shape and size so that one or more interstitial spaces are at least to a large extent sealed off from the ambient space surrounding the projection apparatus.
摘要:
An optical system, in particular an exposure lens for semiconductor lithography, with a plurality of optical elements has at least one load-dissipating structure. The load-dissipating structure diverts the forces originating from the optical elements. The optical system also has a measuring structure constructed independently of the at least one load-dissipating structure.
摘要:
A positioning device is provided with a spindle and a spindle nut cooperating therewith for the conversion of a rotary motion into a linear motion for a coarse adjustment, and a piezoelectric linear positioning element arranged in series with the spindle and spindle nut for fine adjustment. The piezoelectric linear positioning element is relieved of transverse forces and moments by a cardan joint that is arranged between an object seating and the spindle.
摘要:
The present invention relates to a method for evaluating fringe images, in particular, for topographic measurements. During a first step, several phase-displaced patterns are recorded sequentially in time, and the respective phase relations of these patterns are determined by evaluation in the spatial domain (14a, 14b, 15). During a second step, after the phase shifts have been determined accurately in this manner based on the video images themselves, a pixel-by-pixel evaluation of the phase-displaced pattern is performed in the time domain. The invention also includes computer hardware for performing the evaluation of the strip images in video real time.
摘要:
A lithographic projection apparatus according to one embodiment of the invention includes a projection system having a plurality of optical elements or sensors mounted on a frame. The frame includes support portions made of a material (e.g. a glass ceramic) having a coefficient of thermal expansion of less than or approximately equal to 0.1×10−6 K−1.
摘要翻译:根据本发明的一个实施例的光刻投影设备包括具有安装在框架上的多个光学元件或传感器的投影系统。 框架包括由热膨胀系数小于或大约等于0.1×10 -6 K -1的材料(例如玻璃陶瓷)制成的支撑部分。
摘要:
The present invention is a process by which optical surfaces of lenses, particularly plastic progressive lenses and molding shells for producing lenses are manufactured directly in a single step according to didicidual data. A blank from which an optical surface or a molding shell is to be manufactured is held at the workpiece carrier of a spindle axis (Z axis) of a shaping machine and is directly turned into its final form by a turning tool which can move relative to the blank (in the X axis), i.e., transversely to the direction of displacement of the tool. During each rotation of the spindle, the turning tool is incrementally adjusted towards or away from the blank depending on the characteristic surface data, which may be predetermined or calculated on-line.
摘要:
Several bar patterns are projected in sequence on the object (O) to be measured by time-division multiplexing, and images of the bar patterns are recorded by a camera (K). The phases of each bar pattern, as distorted by the object, are calculated for preselected image points by a computer connected with the camera. For each image point, the calculated phases for one of said bar patterns are compared to the phases calculated for at least one other of said bar patterns, thereby producing a beat frequency which can be used to determine height measurements in the direction of the camera axis (z). In order to increase the range of the height measurements, at least two beat frequencies of quite different effective wavelengths are generated and evaluated. Different systems are disclosed for generating the different beat frequencies. In one embodiment, the bar patterns are projected by three different projectors (P.sub.1, P.sub.2, P.sub.3) which are inclined at different angles relative to each other (.alpha..sub.1, .alpha..sub.2). In a second embodiment, only two projectors are used, but each projector has two gratings, the respective periods of which differ from each other only slightly.
摘要:
An optical system, such as a microlithographic projection exposure apparatus, includes a first optical component, a second optical component, and a measurement arrangement for determining the relative position of the first optical component and the second optical component in six degrees of freedom. The measurement arrangement is adapted to determine the relative position of the first optical component and the second optical component over six different length measurement sections. The length measurement sections extend directly between the first optical component and the second optical component.
摘要:
An apparatus for measuring the positions of marks on a mask is provided, said apparatus comprising a mask holder for holding the mask, a recording unit for recording the marks of the mask held by the mask holder, an actuating module for moving the mask holder and the recording unit relative to each other, and an evaluating module, which numerically calculates the gravity-induced sagging of the mask in the mask holder and determines the positions of the marks on the mask, based on the calculated sagging, the recordings made by the recording unit and the relative movement between the mask holder and the recording unit, wherein, prior to calculating said sagging, the present position of the mask in the mask holder is determined and is taken into consideration in said numerical calculation, and/or the geometrical dimensions of the mask are taken into consideration in said numerical calculation of sagging.