摘要:
The invention relates to a method for analysing the imaging behaviour of a first optical imaging element, whereby an object is imaged into an image plane by a second optical imaging element and light in the image plane is detected in a spatially resolved manner, the two optical imaging elements differing in terms of at least one imaging characteristic. Values are determined for the intensity and for at least one second characteristic of the light, said values being then stored in image points, and processed in an emulation step. An emulation image is produced, emulating the imaging of the object by the first optical imaging element, taking into account the influence of the second characteristic. A series of images is produced by dividing a range of values of the second characteristic into subdomains, associating an image with each subdomain, and associating the corresponding intensity value with the image points of each image, in case the value of the second characteristic, associated with the image point, falls in the subdomain associated with the respective image. Otherwise, a pre-determined intensity value is associated therewith. The series of images is converted into a series of intermediate images in the emulation step. A constant value of the second characteristic is used in the emulation for each intermediate image, said value originating from the respective subdomain and differing from the values of the second characteristic for the other intermediate images. The intermediate images are then combined to form an emulation image.
摘要:
The invention relates to a method for determining a repair shape (60, 260) of a defect (30, 200) on or in the vicinity of an edge (32, 232) of a substrate (100), comprising the steps of scanning the defect (30, 200) using a scanning probe microscope for determining a three-dimensional contour (40, 240) of the defect (30, 200), scanning the defect (30, 200) using a scanning electron microscope for determining the course (50, 250) of the at least one edge (32, 232) of the substrate (100), and determining the repair shape (60, 260) of the defect (30, 200) from a combination of the three-dimensional contour (40, 240) and the course (50, 250) of the at least one edge (32, 232).
摘要:
The present invention relates to a method for processing an object with miniaturized structures, having the steps of : feeding a reaction gas onto a surface of the object; processing the object by directing an energetic beam onto a processing site in a region, which is to be processed, on the surface of the object, in order to deposit material on the object or to remove material from the object, detecting interaction products of the beam with the object, and deciding whether the processing of the object must be continued or can be terminated with the aid of information which is obtained from the detected interaction products of the beam with the object, the region to be processed being subdivided into a number of surface segments, and the interaction products detected upon the beam striking regions of the same surface segment being integrated to form a total signal in order to determine whether processing of the object must be continued or can be terminated.
摘要:
The invention relates to a mask inspection method that can be used for the design and production of masks, in order to detect relevant weak points early on and to correct the same. According to said method for mask inspection, an aerial image simulation, preferably an all-over aerial image simulation, is carried out on the basis of the mask design converted into a mask layout, in order to determine a list of hot spots. The mask/test mask is analysed by means of an AIMS tool, whereby real aerial images are produced and compared with the simulated aerial images. The determined differences between the aerial images are used to improve the mask design. The inventive arrangement enables a method to be carried out for mask inspection for mask design and mask production. The use of the AIMS tool directly in the mask production process essentially accelerates the mask production, while reducing the error rate and cost.
摘要:
A charged particle beam exposure system has a blanking aperture array (31) having groups of apertures (53) controlled by shift registers (75), wherein different inputs (C) to the shift registers influence a different number of apertures. Charged particle beamlets traversing the apertures are scanned across a charged particle sensitive substrate in synchronism with a clock signal of the shift registers.
摘要:
The invention relates to an arrangement for inspecting objects, especially masks in microlithography. Said masks are disposed in a vacuum chamber. A converter converts illuminating radiation emitted from the object into radiation of a higher wave length. A sensor is also provided for recording images. The sensor is disposed outside the vacuum chamber and is arranged as an optical interface between the vacuum chamber to the sensor of the converter or at least one part of an image lens is arranged as a window in the vacuum chamber.
摘要:
The invention relates to a method for determining the image quality of an optical imaging system and to the use of the inventive method for determining the influence of samples on the amplitude distribution and on the phase front distribution of the illuminating light of which the amplitude distribution, in particular, is known. The invention comprises the following steps: adjusting the subassemblies relative to one another whereby making it possible to project images of a sample onto the detection device; recording a number of images of the sample from different planes of reference near the best focus plane; improving the image quality by image processing, particularly by reducing the noise in order to compare local sensitivity differences of the detection device and to center the intensity concentration points at a predetermined location in the images; computational linking of locally resolved image information, of the set values and system values related to the optical imaging system, and of information concerning the sample with the aim of determining characteristic numbers that are characteristic of the wave front deformation caused by the imaging system, and; outputting the characteristic numbers and assigning them to the imaging system in order to describe the image quality.
摘要:
The invention relates to a method for analysing objects in microlithography, preferably masks with the aid of aerial image measurement systems (AIMS) comprising at least two imaging stages wherein a detected image is corrected by means of a correction filter with respect to the dynamic systems behaviour of a second imaging stage or another imaging stage, the lighting of the object being carried out by incident and/or transmitted light. The resulted correction is such that corrected output quantities correspond to the image of a photolithography stepper or scanner, said correction being made by reconvolution and the measured correction values being taken into account for the correction.
摘要:
The invention relates to a method for determining the image quality of an optical imaging system and to the use of the inventive method for determining the influence of samples on the amplitude distribution and on the phase front distribution of the illuminating light of which the amplitude distribution, in particular, is known. The invention comprises the following steps: adjusting the subassemblies relative to one another whereby making it possible to project images of a sample onto the detection device; recording a number of images of the sample from different planes of reference near the best focus plane; improving the image quality by image processing, particularly by reducing the noise in order to compare local sensitivity differences of the detection device and to center the intensity concentration points at a predetermined location in the images; computational linking of locally resolved image information, of the set values and system values related to the optical imaging system, and of information concerning the sample with the aim of determining characteristic numbers that are characteristic of the wave front deformation caused by the imaging system, and; outputting the characteristic numbers and assigning them to the imaging system in order to describe the image quality.