WO2016104342A1 - 露光条件評価装置 - Google Patents
露光条件評価装置 Download PDFInfo
- Publication number
- WO2016104342A1 WO2016104342A1 PCT/JP2015/085434 JP2015085434W WO2016104342A1 WO 2016104342 A1 WO2016104342 A1 WO 2016104342A1 JP 2015085434 W JP2015085434 W JP 2015085434W WO 2016104342 A1 WO2016104342 A1 WO 2016104342A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- exposure
- exposure condition
- feature amount
- information
- feature
- Prior art date
Links
- 238000011156 evaluation Methods 0.000 title claims abstract description 46
- 230000009467 reduction Effects 0.000 claims abstract description 20
- 238000004364 calculation method Methods 0.000 claims description 209
- 238000000605 extraction Methods 0.000 claims description 48
- 238000012937 correction Methods 0.000 claims description 37
- 238000005259 measurement Methods 0.000 claims description 30
- 239000000284 extract Substances 0.000 claims description 5
- 238000001000 micrograph Methods 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 235000012431 wafers Nutrition 0.000 description 121
- 238000001878 scanning electron micrograph Methods 0.000 description 92
- 238000000034 method Methods 0.000 description 68
- 230000008569 process Effects 0.000 description 58
- 239000004065 semiconductor Substances 0.000 description 51
- 238000012545 processing Methods 0.000 description 44
- 238000003384 imaging method Methods 0.000 description 15
- 238000013461 design Methods 0.000 description 11
- 238000010894 electron beam technology Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 230000006870 function Effects 0.000 description 7
- 238000007689 inspection Methods 0.000 description 6
- 238000012935 Averaging Methods 0.000 description 5
- 238000012417 linear regression Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000012821 model calculation Methods 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 230000004075 alteration Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000001143 conditioned effect Effects 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000004422 calculation algorithm Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000003708 edge detection Methods 0.000 description 1
- 230000002068 genetic effect Effects 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70483—Information management; Active and passive control; Testing; Wafer monitoring, e.g. pattern monitoring
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F1/00—Originals for photomechanical production of textured or patterned surfaces, e.g., masks, photo-masks, reticles; Mask blanks or pellicles therefor; Containers specially adapted therefor; Preparation thereof
- G03F1/68—Preparation processes not covered by groups G03F1/20 - G03F1/50
- G03F1/82—Auxiliary processes, e.g. cleaning or inspecting
- G03F1/84—Inspecting
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70216—Mask projection systems
- G03F7/70258—Projection system adjustments, e.g. adjustments during exposure or alignment during assembly of projection system
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70483—Information management; Active and passive control; Testing; Wafer monitoring, e.g. pattern monitoring
- G03F7/70491—Information management, e.g. software; Active and passive control, e.g. details of controlling exposure processes or exposure tool monitoring processes
- G03F7/705—Modelling or simulating from physical phenomena up to complete wafer processes or whole workflow in wafer productions
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70483—Information management; Active and passive control; Testing; Wafer monitoring, e.g. pattern monitoring
- G03F7/70491—Information management, e.g. software; Active and passive control, e.g. details of controlling exposure processes or exposure tool monitoring processes
- G03F7/70516—Calibration of components of the microlithographic apparatus, e.g. light sources, addressable masks or detectors
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70483—Information management; Active and passive control; Testing; Wafer monitoring, e.g. pattern monitoring
- G03F7/7055—Exposure light control in all parts of the microlithographic apparatus, e.g. pulse length control or light interruption
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70483—Information management; Active and passive control; Testing; Wafer monitoring, e.g. pattern monitoring
- G03F7/7055—Exposure light control in all parts of the microlithographic apparatus, e.g. pulse length control or light interruption
- G03F7/70558—Dose control, i.e. achievement of a desired dose
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70483—Information management; Active and passive control; Testing; Wafer monitoring, e.g. pattern monitoring
- G03F7/70605—Workpiece metrology
- G03F7/70616—Monitoring the printed patterns
- G03F7/70625—Dimensions, e.g. line width, critical dimension [CD], profile, sidewall angle or edge roughness
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70483—Information management; Active and passive control; Testing; Wafer monitoring, e.g. pattern monitoring
- G03F7/70605—Workpiece metrology
- G03F7/70616—Monitoring the printed patterns
- G03F7/70641—Focus
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70483—Information management; Active and passive control; Testing; Wafer monitoring, e.g. pattern monitoring
- G03F7/70605—Workpiece metrology
- G03F7/706835—Metrology information management or control
- G03F7/706839—Modelling, e.g. modelling scattering or solving inverse problems
Definitions
- the present invention relates to an exposure condition evaluation apparatus such as a reduction projection exposure apparatus, and more particularly to an exposure condition evaluation apparatus that evaluates an exposure condition of a reduction projection exposure apparatus based on information obtained from a conditioned wafer.
- a dimension measurement SEM Critical Dimension-Scanning Electron Microscope: CD-SEM
- CD-SEM Cross-Scanning Electron Microscope
- the exposure light is applied to the photomask of the shielding material on which the circuit pattern to be printed is written, and the image of the photomask is projected onto the resist on the wafer through the lens system.
- Create a circuit pattern One chip or a plurality of chips are printed by one exposure shot, and a circuit pattern is created on the wafer by a plurality of exposure shots.
- the exposure and exposure are determined by appropriately determining the focus and exposure amount.
- the focus and exposure amount are uniformly determined to be appropriate values, the focus and exposure are caused by unevenness on the resist surface due to uneven resist coating, unevenness due to the photomask, lens aberration, etc.
- the value of the quantity deviates from an appropriate value, and a normal circuit pattern is not created, and variation in pattern dimensions increases.
- Patent No. 40658817 (corresponding US Pat. No. 6,929,892)
- the FEM wafer is a wafer used for determining the exposure conditions of the reduction projection exposure apparatus. Further, by modeling the relationship between the exposure conditions and the pattern shape information, a CD-SEM or the like can be obtained. Based on the measurement result obtained by the used measurement, it can be used for grasping under what exposure conditions the wafer to be measured was exposed. As described above, the FEM wafer serves as a reference for evaluating the exposure conditions. If the FEM wafer is not properly formed, the appropriate exposure condition evaluation as described above cannot be performed. For example, if there is uneven application of resist on the FEM wafer itself, the exposure conditions change accordingly, making it difficult to create an appropriate FEM wafer reflecting the change in exposure conditions. Patent Document 1 does not assume a state in which an FEM wafer as a reference for evaluation is not properly formed.
- an exposure condition evaluation apparatus for evaluating wafer exposure conditions appropriately or calculating appropriate exposure conditions based on information obtained from the FEM wafer regardless of the FEM wafer formation state will be described. To do.
- an exposure condition evaluation apparatus including an arithmetic unit that evaluates the exposure conditions of the reduction projection exposure apparatus based on pattern information exposed on the sample by the reduction projection exposure apparatus will be described below.
- the arithmetic device has the second feature of the plurality of patterns formed by unifying the first feature amounts of the plurality of patterns formed by setting a plurality of different exposure conditions.
- An exposure condition evaluation apparatus that corrects using an amount is proposed.
- an exposure condition evaluation including an arithmetic unit that evaluates the exposure condition of the reduced projection exposure apparatus based on the pattern information exposed on the sample by the reduced projection exposure apparatus.
- the apparatus wherein the arithmetic unit creates related information between the first feature amounts of a plurality of patterns formed by setting a plurality of different first exposure conditions and the exposure conditions of the plurality of patterns, A second exposure condition is calculated based on the related information and a second feature amount of a plurality of patterns formed by making the exposure condition uniform, and the calculated second exposure condition is used.
- An exposure condition evaluation apparatus for correcting the first exposure condition is proposed.
- the figure which shows the Example of a semiconductor measuring device The figure which shows the Example of a semiconductor measuring device.
- the figure which shows the Example of a feature-value extraction part The figure which shows the Example of an outline extraction part.
- amendment part The figure which shows the Example of a calculation information generation part.
- the figure which shows the Example of a calculation part The figure which shows the Example of the wafer used by the exposure condition calculation information preparation part.
- the figure which shows the Example of the GUI screen of a semiconductor measuring device The figure which shows the Example of the GUI screen of a semiconductor measuring device.
- the figure which shows the Example of a calculation processing flow The figure which shows the Example of a semiconductor measuring device.
- the figure which shows the Example of a semiconductor measuring device The figure which shows the Example of a semiconductor measuring device.
- the figure which shows each exposure field of a wafer The figure which shows the Example of the processing flow of a semiconductor measuring device.
- the figure which shows the Example of the semiconductor measuring device The figure which shows an example of the SEM image set used for input Diagram showing estimation error obtained at multiple points
- the figure which shows the Example of the semiconductor measuring device The figure which shows the Example of the processing flow of a semiconductor measuring device
- the FEM wafer is a conditioned wafer that is used to find an exposure condition in which an exposure condition (focus, dose) is changed by a reduction projection exposure apparatus while changing an exposure condition to obtain an appropriate pattern size or pattern shape. It is also used when correcting exposure condition fluctuations by associating and storing exposure conditions and pattern evaluation information. More specifically, the pattern is evaluated by SEM or the like, the evaluation value is compared with the evaluation value of the pattern that is the best condition on the FEM wafer, and the exposure amount is corrected so as to suppress the deviation. Used for.
- the FEM wafer is prepared in advance in order to evaluate the relationship between the exposure conditions and the circuit pattern shape.
- the pattern shape is evaluated by extracting features of the pattern from the SEM image (for example, the pattern dimension, the two-dimensional shape of the pattern, etc.), and the information related to the feature amount and the exposure condition is registered as the exposure condition evaluation information.
- the FEM wafer may be generated with a value different from the assumed exposure condition due to unevenness on the resist surface, non-flatness caused by the photomask, lens aberration, and the like.
- the deviation of the exposure condition that occurs on the FEM wafer becomes a cause of a decrease in accuracy when determining the relationship between the exposure condition and the circuit pattern shape. If there is a deviation in exposure conditions on the FEM wafer, the relationship between normal exposure conditions and circuit pattern shapes cannot be obtained. Even if an abnormal relationship is used, the estimated exposure parameter may not be normal.
- the exposure is performed using the relationship between the exposure parameter and the circuit pattern shape that evaluates the relationship between the exposure parameter and the circuit pattern shape that is not affected by unevenness on the surface of the resist.
- a pattern measuring apparatus for obtaining conditions will be described.
- a semiconductor measuring apparatus for obtaining an exposure condition of a semiconductor pattern from an image photographed using an electron beam
- a first SEM obtained by photographing a circuit pattern of a wafer prepared by changing the exposure condition of a reduction projection exposure apparatus.
- a first feature for obtaining pattern dimension and shape information from a first SEM image data set using an image data set and a second SEM image data set obtained by photographing a circuit pattern of a wafer created with uniform exposure conditions Calculate the output of the second feature quantity extraction unit, the first feature quantity extraction unit, and the output of the second feature quantity extraction unit for obtaining pattern dimension and shape information from the quantity extraction unit and the second SEM image data set
- the exposure condition using the relationship between the feature quantity correction unit, the exposure condition corresponding to each SEM image of the first SEM image data set, and the output of the feature quantity correction unit.
- a semiconductor measuring device comprising an exposure condition calculation information generation unit for generating information for determining the describing.
- a semiconductor measuring apparatus for obtaining an exposure condition of a semiconductor pattern from an image photographed using an electron beam
- an SEM image data set obtained by photographing a circuit pattern of a wafer
- a feature amount extraction unit that obtains pattern dimension and shape information from an image data set
- a feature amount correction unit that performs an operation using an output of the feature amount extraction unit and a feature amount reference value that is obtained in advance, an exposure condition, and the feature amount correction unit
- a semiconductor measurement apparatus including an exposure condition calculation unit that obtains an exposure condition using information using the relationship with the output of the above is proposed.
- the semiconductor measuring apparatus exemplified in the embodiments described below relates to a pattern image semiconductor measuring method and apparatus for monitoring exposure conditions of an exposure apparatus from circuit pattern image data obtained by SEM imaging. Further, as a specific example, a process using pattern shape feature values from circuit pattern image data created on two wafers, a wafer created under different exposure conditions and a wafer created under uniform exposure conditions. An example of obtaining a model for detecting fluctuation will be shown.
- a charged particle beam apparatus is illustrated as an apparatus for forming an image, and an example using an SEM is described as one aspect thereof.
- a focused ion beam (FIB) apparatus that scans the beam to form an image may be employed as the charged particle beam apparatus.
- FIB focused ion beam
- FIG. 21 is a schematic explanatory diagram of a measurement and inspection system in which a plurality of measurement or inspection devices are connected to a network.
- the system mainly includes a CD-SEM 2401 for measuring pattern dimensions of a semiconductor wafer, a photomask, etc., and irradiating a sample with an electron beam to acquire an image and compare the image with a pre-registered reference image.
- the defect inspection apparatus 24023 for extracting defects based on the above is connected to the network.
- the network also includes a condition setting device 2403 for setting the measurement position and measurement conditions on the design data of the semiconductor device, and the pattern quality based on the design data of the semiconductor device and the manufacturing conditions of the semiconductor manufacturing device.
- a simulator 2404 for simulation and a storage medium 2405 for storing design data in which layout data and manufacturing conditions of semiconductor devices are registered are connected.
- the design data is expressed in, for example, the GDS format or the OASIS format, and is stored in a predetermined format.
- the design data can be of any type as long as the software that displays the design data can display the format and can handle the data as graphic data.
- the storage medium 2405 may be built in the measuring device, the control device of the inspection device, the condition setting device 2403, and the simulator 2404.
- the CD-SEM 2401 and the defect inspection device 2402 are provided with respective control devices, and necessary control is performed for each device. In these control devices, the functions of the simulator, measurement conditions, etc. are set. You may make it mount a function.
- an electron beam emitted from an electron source is focused by a plurality of lenses, and the focused electron beam is scanned one-dimensionally or two-dimensionally on a sample by a scanning deflector.
- SE Secondary Electron
- BSE backscattered electrons
- the image signals stored in the frame memory are integrated by an arithmetic device mounted in the control device. Further, scanning by the scanning deflector is possible for any size, position, and direction.
- control and the like are performed by the control device of each SEM, and images and signals obtained as a result of scanning with the electron beam are sent to the condition setting device 2403 via the communication line network.
- the control device that controls the SEM and the condition setting device 2403 are described as separate units.
- the present invention is not limited to this, and the condition setting device 2403 controls and measures the device. Processing may be performed in a lump, or SEM control and measurement processing may be performed together in each control device.
- condition setting device 2403 or the control device stores a program for executing a measurement process, and measurement or calculation is performed according to the program.
- the condition setting device 2403 has a function of creating a program (recipe) for controlling the operation of the SEM based on semiconductor design data, and functions as a recipe setting unit. Specifically, positions for performing processing necessary for SEM such as desired measurement points, autofocus, autostigma, and addressing points on design data, pattern outline data, or design data that has been simulated And a program for automatically controlling the sample stage, deflector, etc. of the SEM is created based on the setting. Also, in order to create a template, which will be described later, information on a region serving as a template is extracted from design data, and a processor for creating a template based on the extracted information, or a program for creating a template for a general-purpose processor, or It is remembered.
- a program for controlling the operation of the SEM based on semiconductor design data
- a recipe setting unit Specifically, positions for performing processing necessary for SEM such as desired measurement points, autofocus, autostigma, and addressing points on design data, pattern outline data, or design data that
- FIG. 22 is a schematic configuration diagram of a scanning electron microscope.
- An electron beam 2503 extracted from an electron source 2501 by an extraction electrode 2502 and accelerated by an acceleration electrode (not shown) is focused by a condenser lens 2504 which is a form of a focusing lens, and then is scanned on a sample 2509 by a scanning deflector 2505.
- the electron beam 2503 is decelerated by a negative voltage applied to an electrode built in the sample stage 2508 and is focused by the lens action of the objective lens 2506 and irradiated onto the sample 2509.
- secondary electrons and electrons 2510 such as backscattered electrons are emitted from the irradiated portion.
- the emitted electrons 2510 are accelerated in the direction of the electron source by the acceleration action based on the negative voltage applied to the sample, collide with the conversion electrode 2512, and generate secondary electrons 2511.
- the secondary electrons 2511 emitted from the conversion electrode 2512 are captured by the detector 2513, and the output I of the detector 2513 changes depending on the amount of captured secondary electrons. Depending on the output I, the brightness of a display device (not shown) changes.
- an image of the scanning region is formed by synchronizing the deflection signal to the scanning deflector 2505 and the output I of the detector 2513.
- the scanning electron microscope illustrated in FIG. 22 includes a deflector (not shown) that moves the scanning region of the electron beam.
- the present invention is not limited to such a configuration. It is possible to adopt a configuration in which the detection surface of the electron multiplier tube or the detector is arranged on the orbit.
- the control device 2514 controls each component of the scanning electron microscope, and forms a pattern on the sample based on a function of forming an image based on detected electrons and an intensity distribution of detected electrons called a line profile. It has a function to measure the pattern width.
- the exposure condition calculation information creation unit 1 and the exposure condition calculation unit 2 can be built in the control device 2514 or can be executed by an arithmetic device with built-in image processing, or can be externally connected via a network. It is also possible to perform image evaluation with an arithmetic device (for example, condition setting device 2403).
- FIG. 30 is a view showing an example of an exposure system including an SEM 3000, a reduced projection exposure apparatus 3001, and an exposure condition evaluation apparatus (condition setting apparatus) 3002.
- the exposure condition evaluation apparatus 3002 illustrated in FIG. 30 includes an arithmetic processing unit 3004 that executes arithmetic processing to be described later, and a memory that stores arithmetic expressions necessary for the arithmetic processing, feature amounts obtained as a result of the arithmetic, and exposure conditions. 3005 is incorporated.
- an input / output device 3003 for displaying the output of the calculation result and inputting necessary information is provided.
- the arithmetic processing unit 301 includes a feature amount extraction unit 3006 that extracts two-dimensional information such as a pattern dimension (one-dimensional information), a pattern shape, and an area based on the SEM image.
- the feature amount extraction unit 3006 extracts dimension information between peaks from the signal waveform obtained by the SEM 3000.
- a contour line is extracted from an edge included in the SEM image, and the area and shape information (distortion information, etc.) of the contour line are calculated.
- the feature amount correction unit 3007 corrects the feature amount obtained by the feature amount extraction unit 3006 based on a predetermined condition.
- the feature amount correction unit 3007 makes the exposure condition uniform by using the first feature amount (feature amount of the FEM wafer) of the plurality of patterns formed by setting a plurality of different exposure conditions. Correction is performed using the second feature amount (feature amount of the nominal wafer) of the plurality of formed patterns.
- the calculation result classification unit 3008 classifies the feature amount or the corrected feature amount according to a preset classification condition.
- the classification is performed in shot units and exposure condition units, and stored in a predetermined format.
- a model creation unit 3009 creates a model in which the exposure conditions of the reduced projection exposure apparatus 3001 are associated with the feature quantities of the pattern created under the exposure conditions.
- the model is for grasping the variation of the pattern feature amount and the variation of the exposure condition.
- the model is used for grasping the adjustment amount of the exposure condition for correcting the variation of the feature amount.
- the exposure condition calculation unit 3010 calculates exposure condition correction parameters using the model generated by the model creation unit 3009.
- FIG. 1 is a diagram for explaining an example of a semiconductor measuring apparatus that creates exposure condition calculation information for obtaining a relationship between an SEM image and an exposure condition.
- the exposure condition calculation information creation unit 1 uses the first SEM image data set 4 and the second SEM image data set 5 as inputs.
- the first SEM image data set 4 is an image data set obtained by SEM imaging a circuit pattern of an FEM wafer created by a plurality of exposure shots while changing the exposure conditions Focus and Dose as in the wafer A shown in FIG. .
- the second SEM image data set 5 is an image data set obtained by SEM imaging a circuit pattern of a wafer (Nominal wafer) created by a plurality of exposure shots uniformly without changing the exposure conditions as in the wafer B of FIG. .
- Exposure condition information 3 is information on exposure conditions corresponding to each image data of the first SEM image data set 4.
- the feature amounts of the respective circuit pattern images are calculated from the first SEM image data set 4 and the second SEM image data set 5 through the first and second feature amount calculation units 11 and 12, respectively.
- the feature amount correction unit 13 corrects the feature amount calculated by the first feature amount calculation unit 11 with the feature amount calculated by the second feature amount calculation unit 12.
- the calculation information generation unit 14 obtains the relationship between the feature amount and the exposure condition by using the corrected feature amount and the exposure condition information 3 corresponding to the image.
- the relationship between the obtained feature amount and the exposure condition is output as exposure condition calculation information 6.
- the first and second feature quantity calculation units are used. However, it is also conceivable that the feature quantity calculation unit is used as one unit and divided into two steps. It is also conceivable that the exposure condition calculation information creation unit 1 is provided with a storage unit that stores the feature amount obtained by the feature amount calculation unit.
- FIG. 2 is a diagram for explaining an example of a semiconductor measuring apparatus for obtaining exposure conditions from an SEM image.
- the exposure condition calculation unit 2 inputs the SEM image data set 5 for which the exposure condition is to be obtained.
- the exposure condition calculation information 6 obtained by the exposure condition calculation information creation unit 1 is used as an input.
- the exposure condition calculation information 6 may be stored in advance beforehand.
- the feature amount calculation unit 11 calculates the feature amount of the circuit pattern image from the SEM image data set 5.
- the feature amount correction unit 13 corrects the feature amount calculated by the feature amount calculation unit 11 using a feature amount reference value obtained in advance. The feature amount reference value will be described separately.
- the calculation unit 16 calculates the exposure condition information 7 using the exposure condition calculation information 6 indicating the relationship between the corrected feature amount and the exposure condition.
- the exposure condition information 7 is a value of Focus and Dose.
- FIG. 3 shows an embodiment of the feature amount extraction unit.
- the contour line extraction unit 111 extracts contour line data from the SEM image data. Then, a shape feature is calculated for the contour line data obtained by the shape feature calculation unit 112.
- FIG. 4 shows an example of the contour line extraction unit.
- an edge detection unit 1111 obtains an edge image by extracting an edge such as a Laplacian filter and the like, and a binarization unit 1112 binarizes it with an arbitrary threshold value to make a thin line.
- Contour line data is obtained by thinning in the section 1113.
- the white band may be smoothed, binarized, and thinned to obtain contour line data, or other methods may be used as long as the contour line data with which the pattern shape can be obtained is obtained.
- FIG. 5 shows an example of the shape feature calculation unit.
- the alignment unit 1122 performs alignment with the contour line data of the contour line extraction unit 111 and the reference data created by the reference data creation unit 1121. Then, the distance value calculation unit 1123 obtains the distance between pixels corresponding to each pixel from the aligned contour line data and the reference pattern.
- the statistic calculation unit 1124 calculates the statistic using the distance value obtained for each pixel, and outputs the calculated statistic.
- the reference data created by the reference data creation unit 1121 may be design data, simulation data, or image data or contour line data created by averaging one or a plurality of SEM images. Also, one of the plurality of contour data generated by the contour generation unit 11 may be used as a reference pattern, or a contour created by averaging a plurality of corresponding contour pixels using a plurality of contour lines. A line may be used as a reference pattern. In addition, it is possible to create externally and input from outside without creating here.
- the alignment unit 1122 that aligns the contour line data and the reference pattern images the contour line data and the reference pattern, expands each of them, and performs a matching process using a normalized correlation to perform alignment. It is also conceivable that after the image is formed, the center of gravity of the image is obtained and the center of gravity is aligned. However, the present invention is not limited to this, and the alignment of the contour line data and the reference pattern can be performed by a known matching technique.
- the distance value calculation unit 1123 associates the pixels of the contour line after the alignment with the pixels of the reference pattern, for example, among the pixels of the reference pattern with reference to the pixels of the contour line.
- the pixels having the closest distance are associated as the corresponding reference pattern pixels, and the distance between the corresponding pixels is obtained.
- the statistic calculation unit 1124 calculates the statistic of the distance obtained by all the pixels, for example, the average value, the variance value, the skewness, and the saliency. Etc. are obtained as feature values. You may obtain
- the association is obtained based on the pixels of the contour line, but may be obtained based on the pixels of the reference pattern.
- FIG. 6 shows an embodiment of the feature amount correction unit.
- the first feature quantity extraction unit 11 subtracts the feature quantity obtained by the second feature quantity extraction unit 12 from the feature quantity obtained by the first feature quantity extraction unit 11 by the subtraction unit 131 of the feature quantity correction unit. The obtained feature amount is corrected.
- the selector 134 switches the value to be subtracted between when the exposure condition calculation information is created and when the exposure condition is calculated.
- the exposure condition calculation information is created, the feature amount obtained by the second feature amount extraction unit 12 is selected, and when the exposure condition is calculated, the value of the feature amount reference value 133 is selected.
- the feature amount reference value 133 is obtained when the exposure condition calculation information is created, and is used when calculating the exposure condition.
- the feature amount reference value 133 is obtained by summing a plurality of image data for the feature amount values obtained for each image data of the second feature amount extraction unit 12 by the averaging processing unit 132 and obtaining the average value. . Further, it may be a value created from the feature quantity of the second feature quantity extraction unit 12 of one or a plurality of image data corresponding to a position on a specific wafer. This value is stored internally as a feature value reference value 133 and read when calculating exposure conditions.
- FIG. 7 shows an example of the calculation information generation unit.
- a model indicating the relationship between the corrected feature quantity obtained by the feature quantity correction unit 13 and the exposure condition information 3 is calculated by the model calculation unit 141 and output as the exposure condition calculation information 5.
- the model may be a regression equation that uses a plurality of statistical values as corrected feature values and obtains exposure conditions by linear sums obtained by multiplying the respective coefficients.
- the exposure condition Y can be expressed by a linear sum of weight coefficients X1, X2,... Xn for a plurality of statistical values A1, A2,.
- the exposure condition calculation information is the values of the weight coefficients X1, X2,... Xn, b of each statistical value. Further, it may be obtained by nonlinear regression, or linear programming may be used. A model may be obtained by learning using a plurality of statistical values and their exposure conditions to obtain weights. It is also conceivable to create a library or the like associating the corrected feature quantity with the exposure condition information 3 as a model.
- FIG. 8 shows an example of the calculation unit 16 used in the exposure condition calculation unit 2.
- the model calculation unit 161 performs calculation using the exposure condition calculation information 6 created by the exposure condition calculation information creation unit 1 and the corrected feature quantity obtained by the feature quantity correction unit 13. For example, it is conceivable to calculate the exposure condition by multiplying weights corresponding to a plurality of statistics in the calculation of the model. It is also conceivable to use the exposure condition calculation information 6 as a library corresponding to the corrected feature value, and select the corrected feature value without performing the calculation.
- FIG. 20 shows a resist cross section and a focal position at the time of exposure.
- the resist surface of the wafer has irregularities due to coating unevenness and the like, and even at the same focal position, if the resist is concave, it becomes the upper focal point, and if convex, it becomes the lower focal point and may deviate from the proper focal position.
- a model or the like is created using a wafer created by changing the exposure conditions.
- an appropriate model may not be obtained. Therefore, it is possible to correct the feature value of the wafer circuit pattern created by changing the exposure condition using the feature value of the image obtained by SEM photographing the wafer circuit pattern of the uniform exposure condition. Thought.
- the wafer A created by changing the exposure conditions as shown in FIG. 9 and the wafer B created under the uniform exposure conditions SEM imaging is performed, and the first SEM image data set 4 and the second SEM image data set 5 are obtained.
- the wafer A and the wafer B are photographed at the same wafer position. For example, if the SEM image taken at the coordinates x and y of the wafer A is A1, the SEM image taken at the coordinates x and y of the wafer B is taken as B1 and taken at the same coordinates x and y.
- the wafer A and the wafer B must be SEM photographed at the same coordinates. Even if the same coordinates are within the range of 10 ⁇ m, even if the coordinates are slightly shifted, it is considered that there is no problem because it is considered that the period is smaller than the period of unevenness on the wafer. Since the resist coating unevenness is reproducible, if the two wafers have the same coordinates, the unevenness will be the same. Therefore, it is considered that the feature amount of the unevenness can be corrected by subtracting the feature amount of the image of the wafer B created under the uniform exposure condition from the feature amount of the image of the wafer A created by changing the exposure condition.
- the model subtracts the feature amount of the wafer B, but there may be offset values other than the unevenness in the model. In this case, when obtaining exposure conditions using this model, the offset value is corrected. There is a need.
- FIG. 10 shows a processing flow of the exposure condition calculation condition creation process.
- the SEM imaging process S11 the circuit pattern of the wafer A created by changing the exposure conditions as shown in FIG. 9 and the wafer B created under the uniform exposure conditions are SEM photographed, and the circuit pattern of the wafer A is first photographed by SEM.
- the feature amount of the first SEM image data set is calculated in the first feature amount calculation processing S12
- the feature amount of the second SEM image data set is calculated in the second feature amount calculation processing S12.
- the feature amount calculated in the first feature amount calculation processing S12 is corrected with the feature amount calculated in the second feature amount calculation processing S12. Then, the relationship between the exposure condition of the wafer A created by changing the exposure condition in the calculation information generation process S15 and the corrected feature amount of the image data corresponding to the exposure condition is obtained and output as exposure condition calculation information.
- FIG. 11 shows a processing flow of exposure condition calculation processing.
- SEM imaging processing S21 the circuit pattern of the wafer C whose exposure conditions are to be calculated is SEM-imaged to obtain an SEM image data set. Then, a feature amount of the SEM image data set is calculated in a feature amount calculation process S22.
- the feature amount correction processing S23 the feature amount calculated in the feature amount calculation processing S22 is corrected with a specific value, and in the calculation processing S24, the exposure condition is calculated using the exposure condition calculation information and the corrected feature amount.
- FIG. 12 is a diagram for explaining an example of a semiconductor measurement apparatus that creates exposure condition calculation information using a plurality of contour lines.
- the exposure condition calculation information creation unit 1 will be described here using two contour lines.
- the two shape feature extraction units 17 are used to form these two shapes.
- the exposure condition calculation information generation unit 15 obtains the relationship between the corrected feature quantity of the feature extraction unit 17 and the exposure condition information 3, and outputs the exposure condition calculation information 6.
- the number of shape feature extraction units 17 increases with the number of contour lines. When there are three contour lines, three shape feature extraction units 17 are used, and three corrected feature amounts and exposure conditions are used. A relationship with the information 3 is obtained by the exposure condition calculation information generation unit 15 and the exposure condition calculation information 6 is output.
- FIG. 13 is a diagram for explaining an example of a semiconductor measurement apparatus that calculates exposure conditions using a plurality of contour lines. Here, a case where two contour lines are used will be described.
- the exposure condition calculation unit 2 when the feature amount extraction unit 11 and the feature amount correction unit 13 are combined into a shape feature extraction unit 18, the two shape feature extraction units 18 are used to Using the corrected feature amount and the exposure condition calculation information 6, the calculation unit 16 obtains the exposure condition and outputs the exposure condition information 7.
- the number of shape feature extraction units 18 increases with the number of contour lines. When the number of contour lines is three, three shape feature extraction units 18 are used, and three corrected feature amounts and exposure conditions are used.
- the calculation unit 15 obtains the exposure condition using the calculation information 6 and outputs the exposure condition information 7.
- FIG. 14A shows a GUI example of the semiconductor measuring device.
- When creating information for calculating exposure conditions for example, when creating a model, there is an area for starting execution of model creation as shown in FIG. 14, and exposure as shown in FIG. 9 is used as data to be used.
- a second SEM image obtained by SEM imaging the circuit pattern of wafer B created under uniform exposure conditions, and the A area for specifying the first SEM image data set obtained by SEM imaging of the circuit pattern of wafer A created under different conditions.
- There is a B area for designating a data set and it is conceivable that model creation can be executed by designating two.
- the exposure condition calculation information for calculating the exposure condition as shown in FIG. 14B and the feature amount reference value information for correcting the feature amount may be output. Conceivable.
- the exposure conditions there is an area for starting execution of the calculation process, the C area for designating an image data set for which the exposure conditions are calculated, and the exposure conditions.
- There are information for calculation for example, a D region for specifying a model formula or a library, and an E region for specifying feature amount reference value information used for correction of the feature amount. By specifying these, calculation processing can be executed. It is possible to do so.
- FIG. 16 shows an embodiment of a semiconductor measuring device. 1 is mostly the same as FIG. 1 except that the feature value reference value from the feature value reference value creation unit 15 is output as the feature value reference value information 8. Moreover, the Example of FIG. 17 is shown.
- the feature amount reference value information 8 is input to the exposure condition calculation unit 2 and used by the feature amount correction unit 13, which is different from FIG. 2. In these cases, as shown in FIG. 18, the correction unit 13 determines whether the feature amount of the feature amount extraction processing 12 selected by the selector 134 from the feature amount extraction processing 11 to the subtraction portion 131 or the feature amount reference value of the feature amount reference value information 8 is selected. Correct either one of the two by subtracting the value. Switching by the selector 135 is the same as in FIG.
- FIG. 19 shows a feature quantity reference value creation unit. It is conceivable that the averaging processing unit 151 sums a plurality of pieces of image data for the feature value values obtained for each image data of the second feature value extraction unit 12 to obtain the average value. Further, it may be a value created from the feature amount of the second feature amount extraction unit of one or a plurality of pieces of image data corresponding to a position on a specific wafer. The created value is output as feature amount reference value information 8.
- the exposure condition calculation information is obtained mainly based on the correction of the feature amount.
- the exposure condition calculation information is obtained mainly by correcting the exposure condition.
- the first feature amount of a plurality of patterns formed by setting a plurality of different first exposure conditions and the exposure information of the plurality of patterns are created, and the related information Based on the information and the second feature amount of the plurality of patterns formed by making the exposure condition uniform, the second exposure condition is calculated, and using the calculated second exposure condition.
- FIG. 23 shows an example of the processing flow of the semiconductor measuring apparatus.
- the feature amount is obtained from the SEM image data set 4 obtained by SEM photographing the circuit pattern of the FEM wafer created under a plurality of exposure conditions while changing the first exposure condition Focus and Dose. Then, based on the obtained feature amount and the corresponding exposure condition (Focus and Dose), calculation information (related information between the feature amount and the exposure condition) for creating the exposure condition is created in the calculation information generation process S33.
- the feature amount is obtained from the SEM image data set 5 obtained by SEM photographing the circuit pattern of the wafer created under the plurality of exposure conditions uniformly without changing the exposure condition, and the calculation information generation processing S33.
- the exposure condition is obtained based on the feature amount in the calculation process S35.
- the exposure condition of the first SEM image data set 4 is corrected in the exposure condition correction process S36 using the obtained exposure condition.
- the exposure condition correction process S36 the difference between the exposure condition corresponding to the SEM image data set 5 and the value of the exposure condition calculated in the calculation process S35 based on the feature quantity in the second feature quantity calculation process (exposure condition deviation). ) And adding the deviation of the exposure condition to the exposure condition (Focus and Dose) corresponding to the first feature amount.
- calculation information for obtaining the exposure condition is created again in the calculation information generation process S37. Therefore, it is possible to create calculation information for obtaining the exposure condition in a state where there is no deviation of the exposure condition, and it is possible to obtain an accurate exposure condition.
- the calculation process is further performed using the feature quantity and the calculation information obtained in the second feature quantity calculation process S34. It is conceivable that the exposure condition is obtained in S35, and the above S35 to S39 are repeated a plurality of times until n becomes m. It is considered that it becomes possible to obtain a more accurate exposure condition by repeating.
- the calculation information generation processing As shown in FIG. 25, there is a feature amount obtained in advance from the SEM image data set 5 in the second feature amount calculation processing S52 and obtained in the effective feature amount determination processing S53. It is determined whether or not the value is equal to or less than a specific value, and the wafer position where the characteristic value is equal to or less than the specific value is stored. In the first characteristic value calculation process S54, the stored wafer position or the wafer is recorded. Only for the exposure conditions corresponding to the positions, the feature amount is obtained from the SEM image data set 4 of the circuit pattern of the first FEM wafer. Then, calculation information for obtaining the exposure condition is obtained in the calculation information generation process S55 using the obtained feature amount.
- a location where the deviation from the exposure condition is large is obtained from the SEM image data set 5 in advance, and by removing that portion, only the feature amount of the SEM image data set 4 effective for creating calculation information for obtaining the exposure condition is used. It is possible to improve the accuracy of the calculated information.
- This process corresponds to S33 in FIG.
- the subsequent processing is continued from, for example, S34 in FIG. Since the deviation of the exposure condition is corrected after the exposure condition correction process S36, the feature information corresponding to the exposure condition corresponding to the wafer position determined to be invalid or the wafer position in the calculation information generation process is also included. It is conceivable that the calculation information of the exposure condition is obtained by using it.
- the feature quantity is obtained from the SEM image in the feature quantity calculation process S62, and the exposure condition calculation information is used.
- the exposure condition is obtained in the calculation process S63.
- the feature amount calculation process S62 is the same process as S32 and S34 in FIG.
- the calculation process S63 is also the same process as S35 in FIG.
- FIG. 27 is a diagram for explaining an example of a semiconductor measurement apparatus that creates exposure condition calculation information for obtaining the relationship between the SEM image and the exposure condition.
- the exposure condition calculation information creation unit 1 uses the first SEM image data set 4 and the second SEM image data set 5 as inputs.
- the first SEM image data set 4 is an image data set obtained by SEM imaging a circuit pattern of an FEM wafer created by a plurality of exposure shots while changing the exposure conditions Focus and Dose as in the wafer A shown in FIG. .
- the second SEM image data set 5 is an image data set obtained by performing SEM imaging of a circuit pattern of a wafer created by a plurality of exposure shots uniformly without changing the exposure conditions as in the wafer B of FIG.
- the exposure condition information 3 is exposure condition information corresponding to each image data of the first SEM image data set 4.
- the feature amounts of the respective circuit pattern images are calculated from the first SEM image data set 4 and the second SEM image data set 5 via the first and second feature amount calculation units 11 and 12, respectively.
- the calculation information generation unit 14 obtains the relationship between the feature amount and the exposure condition by using the feature amount obtained by the first feature amount calculation unit 11 and the exposure condition information 3 corresponding to the image.
- the relationship between the obtained feature amount and the exposure condition is output as exposure condition calculation information 6 to the calculation unit 16.
- the calculation unit 16 obtains an exposure condition using the feature amount obtained by the second feature amount extraction unit 12 and the exposure condition calculation information obtained by the calculation information generation unit 14, and further corresponds to the second SEM image data set.
- the difference from the exposure condition is determined as the exposure condition deviation.
- the exposure condition correction unit 10 corrects the exposure condition by adding the exposure condition to the value of the exposure condition in the exposure condition information 3 using the obtained deviation of the exposure condition. Then, the relationship between the feature quantity and the exposure condition is obtained again using the exposure condition corrected by the exposure condition correction section 10 and the feature quantity obtained by the first feature quantity calculation section 11. The relationship between the obtained feature amount and the exposure condition is output as exposure condition calculation information 6.
- the exposure unit calculation information 6 is used to obtain the deviation of the exposure condition by the calculation unit 16 and the above process is repeated a plurality of times.
- the feature quantity extraction unit 11 extracts the feature quantity from the SEM image data set, and the calculation unit 16 uses the exposure condition calculation information 6 created in advance to expose the exposure condition. And the exposure condition information 7 is output.
- FIG. 29 illustrates an example of a semiconductor measurement apparatus that uses the second SEM image data set 5 to create exposure condition calculation information for determining whether or not the feature amount obtained from the first SEM image data set 4 is valid data.
- FIG. 29 Using the second SEM image data set 5 in advance, the feature amount is obtained in the second feature amount calculation processing S52, and it is determined whether or not the obtained feature amount is equal to or less than a specific value. The position of the wafer where the characteristic amount is equal to or less than a specific value is stored.
- the calculation information generation unit 14 when the feature amount is obtained from the SEM image data set 4 of the circuit pattern of the first FEM wafer and the relationship between the feature amount and the exposure condition is obtained by the calculation information generation unit 14, the stored wafer position or the wafer The relationship is obtained using only the feature amount corresponding to the exposure condition corresponding to the position of. Then, the relationship between the feature quantity and the exposure condition is obtained as the exposure condition calculation information 6, the exposure condition is calculated by the calculation unit 16 using the second SEM image data set 5 as in FIG. 28, and the obtained exposure condition is further calculated. The exposure condition is corrected by obtaining the deviation.
- the effective feature quantity judgment section judges.
- the relationship between the feature amount and the exposure condition is obtained using not only the feature amount that has been determined but also the feature amount that has been determined to be invalid, and is output as exposure condition calculation information 6.
- An exposure condition evaluation apparatus is proposed that estimates a deviation of exposure conditions using the feature amount and corrects the first exposure condition.
- a linear regression equation for obtaining a focus value when using the feature amount of the wafer B formed by making the exposure conditions uniform can be similarly expressed by the following equation B.
- the focus value becomes the same set value in all regions.
- the weight X (1 to m) of the feature amount and the exposure condition deviation o (11 to 77) of the wafer area are the same values as the wafer A.
- F4 + o11 X1B1 (11) + X2B2 (11) + .. + XmBm (11) + ⁇ B (11)
- F4 + o12 X1B1 (12) + X2B2 (12) + ..
- FIG. 32 shows an example of the processing flow of the semiconductor measuring device.
- the feature amount is obtained from the SEM image data set 4 obtained by SEM photographing the circuit pattern of the FEM wafer created under the plurality of exposure conditions while changing the first exposure condition Focus and Dose.
- the second feature amount calculation process S74 the feature amount is obtained from the SEM image data set 5 obtained by SEM photographing the circuit pattern of the wafer created under a plurality of exposure conditions uniformly without changing the exposure condition.
- the exposure condition of the exposure condition information 3 is output as it is because there is no exposure deviation value.
- the feature quantity calculated in the first feature quantity calculation process S72 Using the feature amount calculated in the second feature amount calculation process S74, a correspondence relationship with the exposure condition corrected in the exposure condition correction process S75 is obtained, and calculation information for obtaining the exposure condition is generated. It can be obtained by linear regression using the formulas A and B shown above. Information on the feature amount weights X (1 to m) used in the expressions A and B is generated as calculation information.
- the exposure condition is estimated in each region using the calculation information generated in the calculation information generation process S76 and the feature amount obtained from the SEM image data sets 4, 5, and corrected in the exposure condition correction process S75.
- a difference (error) from the value of the exposure condition is obtained, and the errors obtained in the same area corresponding to wafer A and wafer B are averaged to obtain an exposure condition deviation in that area.
- the respective errors obtained in the region No11 of the wafer A and the region No11 of the wafer B in FIG. 31 are 1.2 nm and ⁇ 2.4 nm
- the average value of the exposure deviation of the region No11 is ⁇ 0.6 nm. Become.
- the exposure condition deviation obtained in the exposure deviation calculation process S77 is added to the set value of the exposure condition for each area in the exposure condition correction S75, and calculation information for obtaining the exposure condition is generated in the calculation information generation process S76. This process is repeated m times, and the exposure condition deviation with the smallest error is obtained in the calculation information determination process S79. Then, calculation information of the exposure condition corresponding to the obtained exposure condition deviation is output.
- FIG. 33 is a diagram for explaining an example of a semiconductor measurement apparatus that creates exposure condition calculation information for obtaining a relationship between an SEM image and an exposure condition.
- the exposure condition calculation information creation unit 1 uses the first SEM image data set 4 and the second SEM image data set 5 as inputs.
- the first SEM image data set 4 is an image data set obtained by SEM imaging a circuit pattern of an FEM wafer created by a plurality of exposure shots while changing the exposure conditions Focus and Dose as in the wafer A shown in FIG. .
- the second SEM image data set 5 is an image data set obtained by performing SEM imaging of a circuit pattern of a wafer created by a plurality of exposure shots uniformly without changing the exposure conditions as in the wafer B of FIG.
- the exposure condition information 3 is exposure condition information corresponding to each image data of the first SEM image data set 4.
- the feature amounts of the respective circuit pattern images are calculated from the first SEM image data set 4 and the second SEM image data set 5 via the first and second feature amount calculation units 11 and 12, respectively.
- the calculation information generation unit 14 the feature amount obtained by the first feature amount calculation unit 11 and the second feature amount calculation unit 12 and the exposure condition information 3 corresponding to the image of the first SEM image data set are obtained.
- the relationship with the exposure condition in which the exposure condition deviation is corrected by the exposure condition deviation estimation unit 9 is obtained.
- the exposure condition deviation estimation unit 9 the exposure condition deviation is based on the exposure condition calculation information obtained by the calculation information generation unit 14, the feature amounts extracted by the first and second feature amount extraction units 11 and 12, and the exposure condition information 3. Is estimated.
- a difference (error) between the value obtained by estimating the exposure condition and the value obtained by adding the exposure condition deviation to the exposure condition of the exposure condition information 3 is obtained in each region, and the wafer A and the wafer B, the first SEM image data set 4 and The errors obtained in the same region in the second SEM image data set 5 are averaged and obtained as the exposure condition deviation in that region. Then, a value obtained by adding the exposure condition deviation to the set value of the exposure condition for each region is passed to the calculation information generation unit 14. Then, the calculation information generation unit 14 obtains exposure condition calculation information, and similarly estimates the exposure condition deviation using the obtained exposure condition calculation information. This process is repeated m times to obtain the exposure condition deviation with the smallest error. Then, the calculation information generation unit 14 outputs the calculation information of the exposure condition generated with the exposure condition deviation with the smallest error as the exposure condition calculation information 6.
- the example in which the exposure condition calculation information is obtained from the two wafers using the first and second SEM image data sets has been described.
- a plurality of different exposure conditions An example of obtaining exposure condition calculation information by correcting exposure conditions by obtaining a deviation of exposure conditions using one wafer formed by setting will be described.
- an exposure condition evaluation apparatus is proposed that estimates exposure condition deviations using feature amounts of a plurality of patterns formed by setting a plurality of different exposure conditions and corrects the exposure conditions.
- a plurality of patterns in the vicinity are used.
- a plurality of patterns corresponding to a plurality of different exposure conditions are used.
- the exposure condition calculation information is obtained at each of a plurality of points, and the difference between the estimated exposure value and the set value (estimation error) is obtained as shown in FIG.
- the error swings to plus or minus around zero, and the error approaches zero when averaged.
- the error shifts to plus or minus around the exposure shift value. Get closer.
- the exposure condition calculation information is obtained from each of a plurality of neighboring patterns, the exposure condition is estimated for each exposure area, and the estimation error is obtained and averaged to calculate the exposure deviation value for each exposure area. can do. If the value of the exposure deviation is known, the exposure condition calculation information without the influence of the exposure deviation can be obtained by correcting the value and obtaining the exposure condition calculation information again.
- FIG. 36 is a diagram for explaining an example of a semiconductor measurement apparatus that creates exposure condition calculation information for obtaining the relationship between the SEM image and the exposure condition.
- the exposure condition calculation information creation unit 1 uses the SEM image data set 4 as an input.
- the SEM image data set 4 is an image data set obtained by SEM imaging a circuit pattern of an FEM wafer created by a plurality of exposure shots while changing the Focus and Dose exposure conditions as in the wafer A shown in FIG.
- the exposure condition information 3 is information on exposure conditions corresponding to each image data in the SEM image data set 4.
- the feature amount of each circuit pattern image is calculated from the SEM image data set 4 via the feature amount calculation unit 11.
- the calculation information generation unit 14 obtains the relationship between the feature amount and the exposure condition by using the feature amount obtained by the feature amount calculation unit 11 and the exposure condition information 3 corresponding to the image. Then, the exposure condition is estimated for each exposure region based on the relationship between the feature amount obtained by the exposure deviation calculation unit 20 and the exposure condition, and the feature amount extracted by the feature amount calculation unit 11, and the exposure condition of the exposure condition information Find the difference (error). Then, after repeating the calculation of the errors for a plurality of neighboring patterns, the errors are averaged for each exposure region to obtain an exposure deviation value. Then, the exposure condition is corrected by adding the exposure condition and the exposure deviation value of the exposure condition information.
- the calculation information generation unit 21 obtains the relationship between the feature amount and the exposure condition based on the corrected exposure condition and the feature amount extracted by the feature amount calculation unit 11, and outputs the exposure condition calculation information 6. It can be considered that the calculation information generation unit 21 obtains the relationship between the feature amount and the exposure condition by linear regression.
- FIG. 37 shows an example of the processing flow of the semiconductor measuring device.
- the feature amount calculation process S82 the feature amount is obtained from the SEM image data set 4 obtained by SEM imaging the circuit pattern of the FEM wafer created under a plurality of exposure conditions while changing the first exposure condition Focus and Dose.
- the calculation information generation process S83 calculation information (related information between the feature quantity and the exposure condition) for obtaining the exposure condition is created based on the obtained feature quantity and the corresponding exposure condition (Focus and Dose).
- the exposure condition is determined for each exposure region from the feature quantity of the SEM image data set 4 taken by SEM using the calculation information (related information of the feature quantity and the exposure condition) created in the calculation information generation process S83. And the difference (estimation error) between the estimated exposure condition and the exposure condition (Focus and Dose) is calculated.
- the exposure deviation calculation process S86 m estimated errors obtained for each exposure area are averaged and calculated as an exposure deviation value.
- correction is performed by adding the obtained exposure deviation value to the exposure conditions (Focus and Dose) of the corresponding exposure region.
- exposure condition calculation information 6 (related information on the feature amount and the exposure condition) for obtaining the exposure condition from the corrected exposure condition (Focus and Dose) and the feature amount obtained from the SEM image data set 4 is created. To do.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
- Length-Measuring Devices Using Wave Or Particle Radiation (AREA)
- Testing Or Measuring Of Semiconductors Or The Like (AREA)
- Exposure Of Semiconductors, Excluding Electron Or Ion Beam Exposure (AREA)
Abstract
Description
この場合、露光条件算出情報は各統計値の重み係数X1、X2、…Xn、bの値となる。また、非線形の回帰で求めてもよいし、線形計画法を用いても良い。複数の統計値とその露光条件を用いて学習させて重みを求めてモデルとしてもよい。また、露光条件情報3から補正後の特徴量を対応づけたライブラリ等をモデルとして作成することも考えられる。
また、図15に示すように露光条件を算出する際は、算出処理実行を起動するための領域があり、また、露光条件を算出する対象の画像データセットを指定するC領域と、露光条件を算出するための情報、例えばモデル式やライブラリを指定するD領域と、特徴量の補正に用いる特徴量基準値情報を指定するE領域があり、それらを指定することで算出処理実行が可能となるようにすることが考えられる。
F1+o11= X1A1(11) + X2A2(11) + ・・ + XmAm(11)+εA(11)
F2+o12= X1A1(12) + X2A2(12) + ・・ + XmAm(12)+εA(12)
F3+o13= X1A1(13) + X2A2(13) + ・・ + XmAm(13)+εA(13)
:
F7+o77= X1A1(77) + X2A2(77) + ・・ + XmAm(77)+εA(77)
ウエハAではフォーカスの設定値F(1~7)、算出した特徴量A(1~m)、ウエハの領域の露光条件ずれo(11~77)が各領域(11~77)で変わる。
F4+o11= X1B1(11) + X2B2(11) + ・・ + XmBm(11)+εB(11)
F4+o12= X1B1(12) + X2B2(12) + ・・ + XmBm(13)+εB(12)
F4+o13= X1B1(13) + X2B2(13) + ・・ + XmBm(13)+εB(13)
:
F4+o77= X1B1(77) + X2B2(77) + ・・ + XmBm(77)+εB(77)
これらの式を合わせて線形回帰を求め、各領域の残差εAと残差εBが共に最小になる露光条件ずれo11~o77を、露光条件ずれo11~o77の真値として求める。そして、求めた露光条件ずれを除いた露光条件算出情報6を求める。
2 露光条件算出部
3 露光条件情報
4 第一のSEM画像データセット
5 第二のSEM画像データセット
6 露光条件算出情報
7 露光条件情報
8 特徴量基準値情報
11 第一の特徴量抽出部
12 第二の特徴量抽出部
13 特徴量補正部
14 算出情報生成部
15 特徴量基準値作成部
16 算出部
17 形状特徴抽出部
18 形状特徴抽出部
111 輪郭線抽出部
112 形状特徴算出部
131 減算部
132 平均化処理部
133 特徴量基準値
134 セレクタ
141 モデル算出部
161 モデル演算部
Claims (19)
- 縮小投影露光装置によって試料上に露光されたパターン情報に基づいて、縮小投影露光装置の露光条件を評価する演算装置を備えた露光条件評価装置において、
前記演算装置は、複数の異なる露光条件の設定によって形成された複数のパターンの第1の特徴量を、露光条件を一律にすることによって形成された複数のパターンの第2の特徴量を用いて補正することを特徴とする露光条件評価装置。 - 請求項1において、
前記演算装置は、前記補正された第1の特徴量と、対応する露光条件情報に基づいて、前記補正された第1の特徴量と、露光条件情報との関連情報を生成することを特徴とする露光条件評価装置。 - 請求項2において、
前記演算装置は、前記生成された関連情報に基づいて、露光条件を算出することを特徴とする露光条件評価装置。 - 請求項1において、
前記演算装置は、前記第1の特徴量から、前記第2の特徴量を減算して、前記第1の特徴量を補正することを特徴とする露光条件評価装置。 - 請求項1において、
前記演算装置は、複数の異なる露光条件の設定によって形成された複数のパターンの複数の第1の特徴量を、当該複数のパターンと座標が同じパターンの前記第2の特徴量を用いて補正することを特徴とする露光条件評価装置。 - 請求項1において、
前記第1の特徴量と前記第2の特徴量は、前記試料上に形成されたパターンの寸法情報、及び形状情報の少なくとも1つであることを特徴とする露光条件評価装置。 - 請求項1において、
前記演算装置は、電子顕微鏡画像に含まれるパターンのエッジから輪郭線を抽出し、当該輪郭線の抽出に基づいて、前記第1の特徴量、及び第2の特徴量を算出することを特徴とする露光条件評価装置。 - 請求項1において、
前記演算装置は、前記補正された第1の特徴量と、対応する露光条件情報に基づいて、前記補正された第1の特徴量と、露光条件情報に基づいて、露光条件を求めるためのモデル、或いはライブラリを生成することを特徴とする露光条件評価装置。 - 縮小投影露光装置によって試料上に露光されたパターン情報に基づいて、縮小投影露光装置の露光条件を評価する演算装置を備えた露光条件評価装置において、
前記演算装置は、複数の異なる第1の露光条件の設定によって形成された複数のパターンの第1の特徴量と、当該複数のパターンの露光条件との関連情報を作成し、当該関連情報と、露光条件を一律にすることによって形成された複数のパターンの第2の特徴量に基づいて、第2の露光条件を算出し、当該算出された第2の露光条件を用いて、前記第1の露光条件を補正することを特徴とする露光条件評価装置。 - 請求項9において、
前記演算装置は、前記第1の露光条件に前記第2の露光条件を加算することによって、前記第1の露光条件を補正することを特徴とする露光条件評価装置。 - 請求項9において、
前記演算装置は、前記補正された第1の露光条件と、対応する露光条件情報に基づいて、前記補正された第1の特徴量と、露光条件情報との関連情報を生成することを特徴とする露光条件評価装置。 - 請求項11において、
前記演算装置は、前記生成された関連情報に基づいて、露光条件を算出することを特徴とする露光条件評価装置。 - 請求項9において、
前記演算装置は、前記第1の露光条件の補正を所定回数繰り返すことを特徴とする露光条件評価装置。 - 請求項9において、
前記演算装置は、複数の異なる露光条件の設定によって形成された複数のパターンの複数の第1の特徴量と、当該複数のパターンと座標が同じパターンの前記第2の特徴量に基づいて、前記第1の露光条件を補正することを特徴とする露光条件評価装置。 - 請求項9において、
前記第1の特徴量と前記第2の特徴量は、前記試料上に形成されたパターンの寸法情報、及び形状情報の少なくとも1つであることを特徴とする露光条件評価装置。 - 縮小投影露光装置と、当該縮小投影露光装置によって露光された試料上に形成されたパターンを測定する測定装置と、当該測定装置によって得られたパターン情報に基づいて、前記縮小投影露光装置の露光条件を評価する露光条件評価装置を備えた縮小投影露光システムであって、
前記露光条件評価装置は、複数の異なる露光条件の設定によって形成された複数のパターンの第1の特徴量を、露光条件を一律にすることによって形成された複数のパターンの第2の特徴量を用いて補正することを特徴とする縮小投影露光システム。 - 縮小投影露光装置と、当該縮小投影露光装置によって露光された試料上に形成されたパターンを測定する測定装置と、当該測定装置によって得られたパターン情報に基づいて、前記縮小投影露光装置の露光条件を評価する露光条件評価装置を備えた縮小投影露光システムであって、
前記露光条件評価装置は、複数の異なる第1の露光条件の設定によって形成された複数のパターンの第1の特徴量と、当該複数のパターンの露光条件との関連情報を作成し、当該関連情報と、露光条件を一律にすることによって形成された複数のパターンの第2の特徴量に基づいて、第2の露光条件を算出し、当該算出された第2の露光条件を用いて、前記第1の露光条件を補正することを特徴とする縮小投影露光システム。 - 縮小投影露光装置によって試料上に露光されたパターン情報に基づいて、縮小投影露光装置の露光条件を評価する演算装置を備えた露光条件評価装置において、
前記演算装置は、複数の異なる第1の露光条件の設定によって形成された複数のパターンの第1の特徴量と、露光条件を一律にすることによって形成された複数のパターンの第2の特徴量に基づいて、当該複数のパターンの露光条件との関連情報を作成し、当該関連情報を用いて、前記第1、第2の露光条件を補正することを特徴とする露光条件評価装置。
- 縮小投影露光装置によって試料上に露光されたパターン情報に基づいて、縮小投影露光装置の露光条件を評価する演算装置を備えた露光条件評価装置において、
前記演算装置は、複数の異なる露光条件の設定によって形成された複数のパターンの特徴量の当該複数のパターンの露光条件との関連情報を作成し、当該関連情報を用いて、前記露光条件を補正することを特徴とする露光条件評価装置。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/536,255 US10558127B2 (en) | 2014-12-26 | 2015-12-18 | Exposure condition evaluation device |
KR1020177016892A KR101992550B1 (ko) | 2014-12-26 | 2015-12-18 | 노광 조건 평가 장치 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014263805A JP2018056143A (ja) | 2014-12-26 | 2014-12-26 | 露光条件評価装置 |
JP2014-263805 | 2014-12-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016104342A1 true WO2016104342A1 (ja) | 2016-06-30 |
Family
ID=56150362
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2015/085434 WO2016104342A1 (ja) | 2014-12-26 | 2015-12-18 | 露光条件評価装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US10558127B2 (ja) |
JP (1) | JP2018056143A (ja) |
KR (1) | KR101992550B1 (ja) |
WO (1) | WO2016104342A1 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11764111B2 (en) * | 2019-10-24 | 2023-09-19 | Texas Instruments Incorporated | Reducing cross-wafer variability for minimum width resistors |
JP7309639B2 (ja) * | 2020-03-13 | 2023-07-18 | キオクシア株式会社 | 半導体装置製造システム、半導体装置製造プログラム、及び半導体装置の製造方法 |
WO2021222688A1 (en) * | 2020-04-30 | 2021-11-04 | Photronics, Inc. | System, method, and program product for manufacturing a photomask |
KR20220095472A (ko) * | 2020-12-30 | 2022-07-07 | 삼성전자주식회사 | 패턴 분석 시스템 및 상기 시스템을 이용한 반도체 장치 제조 방법 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012081587A1 (ja) * | 2010-12-14 | 2012-06-21 | 株式会社ニコン | 検査方法、検査装置、露光管理方法、露光システムおよび半導体デバイス |
JP2013074221A (ja) * | 2011-09-29 | 2013-04-22 | Hitachi High-Technologies Corp | 画像分類支援を行う荷電粒子線装置 |
WO2013122022A1 (ja) * | 2012-02-14 | 2013-08-22 | 株式会社 日立ハイテクノロジーズ | 画像評価装置及びパターン形状評価装置 |
WO2014104194A1 (ja) * | 2012-12-27 | 2014-07-03 | 株式会社ニコン | 検査装置、検査方法、露光システム及び露光方法、並びにデバイス製造方法 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6159644A (en) * | 1996-03-06 | 2000-12-12 | Hitachi, Ltd. | Method of fabricating semiconductor circuit devices utilizing multiple exposures |
JP4065817B2 (ja) | 2003-08-12 | 2008-03-26 | 株式会社日立ハイテクノロジーズ | 露光プロセスモニタ方法 |
US6873938B1 (en) * | 2003-09-17 | 2005-03-29 | Asml Netherlands B.V. | Adaptive lithographic critical dimension enhancement |
EP2085741A1 (en) * | 2006-09-28 | 2009-08-05 | Nikon Corporation | Line width measuring method, image forming status detecting method, adjusting method, exposure method and device manufacturing method |
US8671366B2 (en) * | 2009-08-21 | 2014-03-11 | Hitachi High-Technologies Corporation | Estimating shape based on comparison between actual waveform and library in lithography process |
JP5286337B2 (ja) * | 2010-08-30 | 2013-09-11 | 株式会社日立ハイテクノロジーズ | 半導体製造装置の管理装置、及びコンピュータプログラム |
JP5963453B2 (ja) * | 2011-03-15 | 2016-08-03 | 株式会社荏原製作所 | 検査装置 |
-
2014
- 2014-12-26 JP JP2014263805A patent/JP2018056143A/ja active Pending
-
2015
- 2015-12-18 US US15/536,255 patent/US10558127B2/en active Active
- 2015-12-18 KR KR1020177016892A patent/KR101992550B1/ko active IP Right Grant
- 2015-12-18 WO PCT/JP2015/085434 patent/WO2016104342A1/ja active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012081587A1 (ja) * | 2010-12-14 | 2012-06-21 | 株式会社ニコン | 検査方法、検査装置、露光管理方法、露光システムおよび半導体デバイス |
JP2013074221A (ja) * | 2011-09-29 | 2013-04-22 | Hitachi High-Technologies Corp | 画像分類支援を行う荷電粒子線装置 |
WO2013122022A1 (ja) * | 2012-02-14 | 2013-08-22 | 株式会社 日立ハイテクノロジーズ | 画像評価装置及びパターン形状評価装置 |
WO2014104194A1 (ja) * | 2012-12-27 | 2014-07-03 | 株式会社ニコン | 検査装置、検査方法、露光システム及び露光方法、並びにデバイス製造方法 |
Also Published As
Publication number | Publication date |
---|---|
JP2018056143A (ja) | 2018-04-05 |
US10558127B2 (en) | 2020-02-11 |
KR20170088911A (ko) | 2017-08-02 |
US20170336717A1 (en) | 2017-11-23 |
KR101992550B1 (ko) | 2019-06-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10937146B2 (en) | Image evaluation method and image evaluation device | |
JP5276854B2 (ja) | パターン生成装置およびパターン形状評価装置 | |
US8767038B2 (en) | Method and device for synthesizing panorama image using scanning charged-particle microscope | |
US9830705B2 (en) | Image evaluation apparatus and pattern shape evaluation apparatus | |
US8295584B2 (en) | Pattern measurement methods and pattern measurement equipment | |
JP5604067B2 (ja) | マッチング用テンプレートの作成方法、及びテンプレート作成装置 | |
US20120290990A1 (en) | Pattern Measuring Condition Setting Device | |
JP5966087B2 (ja) | パターン形状評価装置及び方法 | |
WO2016104342A1 (ja) | 露光条件評価装置 | |
TW202418220A (zh) | 圖像處理程式、圖像處理裝置、圖像處理方法及缺陷檢測系統 | |
JP6286544B2 (ja) | パターン測定条件設定装置、及びパターン測定装置 | |
US20110260058A1 (en) | Charged particle radiation device and image capturing condition determining method using charged particle radiation device | |
JP5868462B2 (ja) | パターン形状評価装置 | |
KR20230004819A (ko) | 화상 처리 방법, 형상 검사 방법, 화상 처리 시스템 및 형상 검사 시스템 | |
JP5596812B2 (ja) | パターン生成装置およびパターン形状評価装置 | |
JP6207893B2 (ja) | 試料観察装置用のテンプレート作成装置 | |
US9947088B2 (en) | Evaluation condition setting method of semiconductor device, and evaluation condition setting apparatus | |
JP5604208B2 (ja) | 欠陥検出装置及びコンピュータプログラム | |
JP2014032102A (ja) | 信号処理装置及び荷電粒子線装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 15872911 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 20177016892 Country of ref document: KR Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 15872911 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: JP |