WO2010073527A1 - 検査方法及び検査装置 - Google Patents
検査方法及び検査装置 Download PDFInfo
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- WO2010073527A1 WO2010073527A1 PCT/JP2009/006829 JP2009006829W WO2010073527A1 WO 2010073527 A1 WO2010073527 A1 WO 2010073527A1 JP 2009006829 W JP2009006829 W JP 2009006829W WO 2010073527 A1 WO2010073527 A1 WO 2010073527A1
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- Prior art keywords
- inspection
- scattering intensity
- inspection apparatus
- condition
- film thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/9501—Semiconductor wafers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/93—Detection standards; Calibrating baseline adjustment, drift correction
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/94—Investigating contamination, e.g. dust
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L22/00—Testing or measuring during manufacture or treatment; Reliability measurements, i.e. testing of parts without further processing to modify the parts as such; Structural arrangements therefor
- H01L22/10—Measuring as part of the manufacturing process
- H01L22/12—Measuring as part of the manufacturing process for structural parameters, e.g. thickness, line width, refractive index, temperature, warp, bond strength, defects, optical inspection, electrical measurement of structural dimensions, metallurgic measurement of diffusions
Definitions
- the present invention relates to an inspection method and inspection apparatus for inspecting defects.
- the present invention is suitable for use in semiconductor element inspection / measurement and semiconductor manufacturing process management in the field of semiconductor element manufacturing, and a method for creating inspection conditions And a technique for inspecting defects using the inspection conditions.
- the inspection conditions required for inspection by inspection equipment are to prepare wafers for each film type and film thickness of the film formed on the substrate, apply standard particles of multiple sizes to all the wafers, The coated film type and film thickness were inspected with an inspection device, and optimum inspection conditions were created for each film type and film thickness. Therefore, it takes a lot of time and money to create inspection conditions for each film type and film thickness.
- Patent Document 1 discloses an inspection system and a method for manufacturing a semiconductor device aimed at increasing the efficiency of inspection time by classifying wafer lots and feeding back to recipes.
- the inspection conditions necessary for the inspection of the inspection apparatus were to prepare wafers for each film type and film thickness of the film formed on the substrate, and to apply standard particles of a plurality of sizes to all the wafers.
- the wafers for each film type and film thickness to which standard particles were applied were inspected by an inspection device, and the optimal inspection conditions were created for each film type and film thickness, it took a great amount of time, materials, and expenses to create the inspection conditions. Therefore, the reduction has been an issue.
- An object of the present invention is to reduce the inspection condition creation work time.
- the first feature of the present invention is that the fluctuation range of the scattering intensity is divided into a plurality of regions according to the intensity based on the relationship between the film thickness of the film formed on the substrate and the scattering intensity.
- the second feature of the present invention is that the scattering intensity fluctuation range is converted into a size by using a sensitivity curve obtained from the relationship between the particle size and the scattering intensity.
- the sensitivity curve obtained from the relationship between the particle size and the scattering intensity is sometimes referred to as a calibration curve.
- the third feature of the present invention is that the fluctuation range of the scattering intensity is divided into a plurality of divisions based on either the fluctuation range after the division or the number of divisions of the scattering intensity fluctuation range.
- the fourth feature of the present invention is that the inspection conditions are made common for each divided scattering intensity region, and the inspection is performed under the common inspection conditions.
- the fifth feature of the present invention is that an inspection condition suitable for the substrate to be inspected is selected and inspected from inspection conditions common to each divided scattering intensity region.
- a sixth feature of the present invention is to display a film thickness necessary for creating an inspection condition to be shared for each divided scattering intensity region.
- the seventh feature of the present invention is that it has a database connected to the inspection apparatus and a simulator connected to the database.
- the eighth feature of the present invention is that the scattering intensity corresponding to the particle size is calculated using simulation data and actual measurement data.
- a ninth feature of the present invention is to calculate a reference inspection condition, a scattering intensity corresponding to a particle size calculated using corresponding simulation data and actual measurement data, and an inspection condition used in the inspection. .
- the tenth feature of the present invention is that the simulation result is corrected using the refractive index, and the scattering intensity corresponding to the particle size is calculated.
- the eleventh feature of the present invention is that the correction coefficient obtained from the comparison result between the actual measurement value and the simulation value is reflected in the calculation formula of the scattering intensity, and the scattering intensity corresponding to the particle size is calculated.
- a twelfth feature of the present invention is that the control unit of the inspection apparatus is controlled based on a signal from a database.
- the inspection condition creation work time can be reduced.
- the system configuration figure of a 1st embodiment The block diagram of the optical wafer surface inspection apparatus of 1st Embodiment of embodiment of this invention.
- the inspection conditions necessary for the inspection of an optical wafer surface inspection apparatus for inspecting foreign matters and defects on the wafer surface are the preparation of wafers for each film type and film thickness, the application of standard particles to those wafers, and further It took a lot of time and money to inspect the wafers with an inspection device and create optimum inspection conditions for each film type and film thickness. Even when the film type and film thickness of the wafer to be inspected have changed due to a change in the manufacturing process, it is necessary to create new inspection conditions.
- the present invention is applied to an optical wafer surface inspection apparatus, and the scattering intensity characteristic with respect to the film thickness is calculated by a simulator or the like, and the result is divided into a plurality of divided by the scattering intensity and an inspection condition is created and shared for each divided area. This reduces the work for creating inspection conditions.
- FIG. 1 shows an embodiment of a system according to the present invention.
- the system includes an optical wafer surface inspection apparatus 100, a review SEM (Scanning / Electron / Microscope) 101, a CD-SEM (Critical / Dimension-Scanning / Electron Microscope) 102, a data server 103, an electrical test apparatus 104, and an analysis apparatus 105.
- Each device is connected by a network 120.
- the data server 103 is a computer that can store measurement data acquired by each apparatus, such as foreign matter, defect inspection results acquired by the optical wafer surface inspection apparatus 100, and test data acquired from the electrical test apparatus 104.
- the data server 103 has a scattering intensity characteristic database 110 and stores the scattering intensity characteristic with respect to the film thickness for each film type calculated by the simulator 111.
- FIG. 2 shows a configuration diagram of the optical wafer surface inspection apparatus.
- the optical wafer surface inspection apparatus 100 includes a sample inspection table 210, an illumination light source 220, a scattered light detection unit 230, a signal synthesis unit 240, an overall control unit 250, a stage control unit 260, an information display unit 270, an input operation unit 280, and a storage. Part 290 and communication part 295.
- the sample inspection table 210 includes a sample stage 211 on which a sample such as the wafer 200 is placed, a rotation drive unit 213 that rotates the sample stage 211 around the rotation shaft 212, and a slide drive unit 214 that moves the sample stage 211 in the radial direction. I have.
- the rotation drive unit 213 and the slide drive unit 214 are controlled by a later-described stage control unit 260 that receives a command signal from the later-described overall control unit 250.
- the illumination light source 220 is installed so that the irradiated light (illumination light 221) irradiates a certain point (spot) on the sample stage 211. Therefore, under the control of the stage control unit 260, the slide drive unit 214 moves in the radial direction while the rotation drive unit 213 of the sample inspection table 210 rotates the rotation shaft 212, so that every place on the sample stage 211 is spotted.
- the illumination light 221 can be irradiated to a specific position of the wafer 200 on the sample stage 211.
- the stage controller 260 converts the specific position of the wafer 200 irradiated with the illumination light 221 into XY coordinates by the rotation angle of the rotation driving unit 213 and the radial movement distance of the slide driving unit 214. it can.
- the acquired XY coordinate data is stored in the storage unit 290 via the overall control unit 250.
- the illumination light 221 is preferably light having a high degree of convergence of light, such as laser light, in order to minimize the area that the light hits.
- the scattered light detection unit 230 includes detectors 231a to 231d that detect light.
- detectors 231a to 231d that detect light.
- FIG. 2 a total of four detectors, detectors 231a and 231d arranged at low angle positions and detectors 231b and 231c arranged at high angle positions, are shown, but the number of detectors is not limited, Two or more detectors may be arranged so that the detectors 231a to 231d are different in at least one of the azimuth angle and the elevation angle between each spot and the detector.
- Each of the detectors 231a to 231d is irradiated with illumination light (laser light) 221 from the illumination light source 220 on the surface of the wafer 200, and detects scattered light generated at the spot.
- the detection signals output from the detectors 231a to 231d include a foreign matter or defect signal (defect signal) and a surface roughness signal (Haze signal; haze signal).
- the detectors 231a to 231d are connected to the amplifiers 232a to 232d, respectively, and then connected to the A / D converters 233a to 233d.
- the detection signals of the detectors 231a to 231d are amplified by the amplifiers 232a to 232d and converted into digital signals by the A / D converters 233a to 233d.
- the signal synthesis unit 240 creates a synthesized signal obtained by synthesizing the detection signals of the detectors 231a to 231d converted into digital signals according to the specified calculation condition (program).
- the synthesized signal data synthesized by the signal synthesizing unit 240 and the detection signal data of the detectors 231a to 231d converted into digital signals that are the basis of the synthesized signal are stored in the storage unit 290 via the overall control unit 250.
- the overall control unit 250 controls the entire optical wafer surface inspection apparatus. For example, an operation signal from the input operation unit 280 is received, a process corresponding to the operation signal is performed using a program stored in the storage unit 290, and the stage controller 260 has a rotation driving unit 213 included in the sample inspection table 210. In addition, a command signal for controlling the slide drive unit 214 is output, and calculation conditions for synthesizing the detection signals of the detectors 231a to 231d converted into digital signals by the signal synthesis unit 240 are changed.
- the overall control unit 250 causes the storage unit 290 to store the combined signal data combined by the signal combining unit 240 and the detection signal data of the detectors 231a to 231d that are converted into digital signals based on the combined signal.
- the data is processed using a processing program stored in the storage unit 290 and displayed on the information display unit 270.
- the signal synthesis unit is described. However, each signal of the detectors 233a to 233d is individually processed, or data obtained by extracting a part thereof is directly processed by the overall control unit 250, and is displayed on the display unit 270. When displaying, it is not necessary to go through the signal synthesis unit 240.
- all or part of the signals of the detectors 233a to 233d are directly stored in the storage unit 290, or all or part of the signals of the detectors 233a to 233d are processed by the overall control unit 250, It may be stored in the storage unit 290.
- the input operation unit 280 is for the user to input detection signal synthesis conditions by the signal synthesis unit 240 as described above, and to instruct the operation of each device.
- the storage unit 290 stores programs and constants necessary for various types of control / arithmetic processing, measurement results (synthetic signals and detection signals), synthesis conditions set by the input operation unit 280, and the like.
- the combined signal data and detection signal data of the detectors 231a to 231d are stored together with the measurement position (coordinates) of the scattered light on the wafer obtained from the stage control unit 260.
- the communication unit 295 is connected to the network 140, and the overall control unit 250 transmits and receives data to and from the data server 120 and the design information database 130 via the communication unit 295.
- FIG. 3 shows an example of an inspection condition creation procedure of the optical wafer surface inspection apparatus.
- a wafer is prepared by applying standard particles of a plurality of sizes in a spot shape for each film type and film thickness, and an inspection condition is created according to the following procedure.
- a wafer prepared for each film type and film thickness is subjected to a reference inspection condition inspection S10 under reference inspection conditions registered in advance in the wafer surface inspection apparatus 100.
- the reference inspection condition is a condition in which parameters are set so that various information from the wafer such as scattering intensity from the standard particles applied to the wafer and noise obtained from the surface of the wafer can be easily obtained.
- the laser power optimum for the inspected wafer can be obtained by performing laser power determination S20 from the inspection result obtained in the reference inspection condition inspection procedure S10.
- polarization condition determination S30 the polarization state of the illumination light irradiated onto the wafer is switched and inspected using the polarization switching mechanism built in the illumination light source 220, and the S / N ratio (signal / noise ratio) is the highest among them. ) choose good polarization conditions. Since the light projection conditions are determined by the above procedure, the detection system conditions are determined in the detector sensitivity adjustment procedure S40. The wafer is inspected using the light projection conditions determined in the laser power determination procedure S20 and the polarization condition determination procedure S30, and the parameters of the detectors 231a to 231d are adjusted. Here, it is determined whether or not the desired sensitivity has been obtained.
- detector sensitivity adjustment S40 is performed, and if the target sensitivity is obtained, sensitivity curve creation S60 is performed.
- the conditions of the projecting and receiving systems are determined, and the scattering intensity obtained from the standard particles of each size applied to the wafer is determined, so that the relationship between the scattering intensity of the standard particles of each size and the size of the standard particles can be obtained.
- the relationship between the scattering intensity of the standard particles of each size and the size of the standard particles is called a sensitivity curve, and is used for converting the scattering intensity obtained from the inspection apparatus into a size.
- the inspection condition is completed by setting a detector threshold value S70 for separating the scattering intensity from the standard particles applied to the wafer and the noise generated from the surface of the wafer.
- This screen is used to display information necessary for investigating and selecting the polarization condition and detection particle size suitable for sharing.
- Polarization comparison items for comparison of scattering intensity characteristic data for each polarization condition scattering characteristic items for confirming scattering intensity characteristic data for each particle size
- sensitivity curve items indicating the correlation between particle size and scattering intensity for each film thickness The display screen can be switched by clicking the polarization comparison tab 414, the scattering characteristic tab 415, and the sensitivity curve tab 416.
- Fig. 4 shows a screen for polarization comparison items.
- the display data such as the display range of the film thickness and the scattering intensity, the particle size, the polarization condition, etc. in the scattering characteristic data display column 422 and the scattering characteristic data graph 422 of the scattering intensity characteristic database 110 displayed in a graph for easy comparison and confirmation. It consists of a graph setting field 417 for setting.
- a list of film types possessing scattered intensity characteristic data is displayed from the data server 103, and the film type for investigating and selecting the polarization conditions and detection particle sizes suitable for sharing the inspection conditions from among them is displayed. Is selected, the selected film type is displayed in the selected film type display column 412, and the refractive index of the selected film type is displayed in the refractive index display column 413. Note that as a method of searching the scattering intensity characteristic data from the data server 103, a search using a film type name, a search using a refractive index, and the like can be considered.
- the scattering characteristic data display column 422 displays the scattering characteristic data 423 for each polarization condition for the film type selected by the button 411 in an overlapping manner with respect to the film thickness for each film type held in the data server 103.
- the comparison of the scattering characteristic data of each polarization condition for the film type selected by the button 411 is facilitated, and the investigation and selection of the polarization condition suitable for sharing the inspection condition is facilitated.
- the polarization condition legend 423 indicates which polarization condition the scattering characteristic data 423 for the displayed film type indicates.
- the scattering characteristic data 423 held by the data server 103 holds scattering characteristic data for each particle size in addition to the scattering characteristics for each film type.
- the graph setting column 417 has a pull-down menu 418 for selecting a particle size from among them, and the particle size is selected from the particle sizes held in the scattering characteristic database for the film thickness for each film type in the data server 103.
- the scattering intensity display range of the scattering characteristic data display column 422 can be designated in the scattering intensity range designation column 420 in order to display and compare the scattering characteristic data for each polarization condition displayed in detail.
- the display range of the film thickness in the scattering characteristic data display column 422 can be designated.
- the scattering intensity and film thickness display ranges are automatically determined according to the displayed scattering characteristic data 423, and the values at that time are respectively scattered. They are displayed in the intensity range designation column 420 and the film thickness range designation column 421.
- FIG. 5 shows a screen of scattering characteristic items for confirming the scattering intensity characteristic data for each particle size.
- the sample data display column 410 is common to the polarization comparison items in FIG. 4 and displays the selected film type and refractive index.
- the scattering intensity characteristic display column 517 displays the scattering intensity characteristic with respect to the film thickness for each particle size
- the graph setting column 512 automatically displays the setting contents corresponding to the scattering intensity characteristic display column 517. Is displayed.
- the graph setting field 512 has a polarization condition pull-down menu 513 for selecting the polarization condition of the scattering intensity characteristic displayed in the scattering intensity characteristic display field 517, and the scattering intensity characteristic display field 517 contains the polarization condition selected in the polarization condition pull-down menu.
- Scattering characteristic data can be displayed.
- the particle size selection check box displays the particle size of the scattering intensity characteristic held in the data server 103, and the scattering intensity characteristic 519 of the particle size for which the check box is checked is displayed in the scattering intensity characteristic display field 517.
- the particle size legend 518 is displayed with the particle size selection check box 514 checked.
- the scattering intensity display range designation column and the film thickness display range designation column have the same functions as those in the polarization condition comparison tab.
- FIG. 6 shows a screen of sensitivity curve items showing the correlation between the particle size and the scattering intensity for each film thickness.
- the sensitivity curve item screen includes a sample data display column, a graph setting column 611, and a sensitivity curve display column 616 indicating the correlation between the particle size and the scattering intensity for each film thickness.
- the sensitivity curve tab 610 is clicked, the contents corresponding to the sensitivity curve item are automatically displayed in the graph setting field 611 and the sensitivity curve display field 616.
- the scattering characteristic data for the film thickness with different polarization conditions can be switched as needed. Can be displayed.
- the film thickness selection check box displays the film thickness of the scattering intensity characteristic stored in the data server 103, and the film thickness scattering intensity characteristic 618 with the check box checked is displayed in the scattering intensity characteristic display field 616.
- the film thickness legend 617 is displayed by checking the film thickness selection check box 613.
- the scattering intensity display range designation column and the film thickness display range designation column have functions similar to those of the polarization condition comparison tab and the scattering characteristic tab.
- the scattering intensity characteristic with respect to the film thickness for each film type held in the data server 103 is analyzed using FIG. 4: polarization comparison item, FIG. 5: scattering characteristic item, and FIG. 6: sensitivity curve item.
- Optimal polarization conditions, detection particle size, etc. can be selected in order to standardize inspection conditions. By selecting the optimum polarization condition, detection particle size, and the like, it is possible to perform a stable inspection while minimizing errors that occur in common inspection conditions.
- Fig. 7 shows a master condition setting screen for setting parameters for dividing the scattering intensity into a plurality of regions according to intensity and setting for common inspection conditions.
- the master condition column 710 the master condition is saved and read, and the condition of each divided area is registered.
- the master condition includes various information necessary for common conditions, such as the division setting of the scattering intensity and the registration information of a plurality of conditions created for each scattering intensity region.
- the button 711 When the button 711 is clicked, the created master condition is saved, and when the button 712 is clicked, the already created master condition can be read.
- An arbitrary master condition name is input in the text box 713 and used when selecting a master condition on an inspection screen or the like.
- the pull-down menu 714 selects a film type used for setting from the scattering intensity characteristic calculated by the simulator 111.
- the scattering intensity characteristics 739 and the variation of the scattering intensity with respect to the selected film type and grain thickness are selected.
- a size error range 740 of the scattering intensity characteristic obtained by converting the width into the size using the sensitivity curve is automatically displayed.
- the individual condition registration field 716 when a plurality of inspection conditions selected from the pull-down menus 717 to 721 are registered as master conditions, and wafer information is input on the inspection screen and inspection is executed, inspection conditions corresponding to the scattering intensity of the wafer to be inspected are displayed. Automatic selection is performed.
- the scattering intensity region division setting column 730 settings relating to the division of the scattering intensity region are performed for the scattering intensity characteristic 739. There are a plurality of setting methods, such as a method of specifying the number of divisions of the scattering intensity region, and a method of specifying a size error caused by dividing the scattering intensity region and sharing the inspection conditions.
- a size error caused when the scattered intensity region is divided by the designated number of divisions is displayed in the text box 736. Is displayed.
- the size error is selected, when the size error is input to the text box 735, the number of divisions when the scattering intensity is divided so that the error specified in the text box 735 is displayed in the text box 737 is displayed in the text box 737. The result is displayed in the scattering intensity division result 738.
- the applied film thickness range is displayed in the film thickness application range 741 in different colors for each scattering intensity divided region.
- the film thickness necessary for creating the inspection condition for each divided region is automatically displayed in the condition creation candidate list 751.
- One film thickness is selected from the film thicknesses displayed for each region, a wafer is prepared, and conditions are created.
- FIG. 8 is an inspection setting screen for designating a wafer and a master condition when the wafer is inspected by the inspection apparatus using the master condition sharing the inspection condition.
- a loader selection button 811 for selecting a loader on which a wafer to be inspected is mounted from among a plurality of loaders of an inspection apparatus, selection of a wafer shelf number, and a wafer for entering the film thickness of the wafer.
- the master condition information 821 is a column for displaying the reading of the inspection condition and the information of the read inspection condition.
- the master condition name is displayed in the condition name display field 823, and the film type targeted by the read master condition is displayed in the film type display field 824 in the detection sensitivity display field 825.
- the area division number display field 826 shows the read master condition scattering intensity division number
- the size error display field 827 shows the read master condition scattering intensity division size error. Is displayed.
- the scattering intensity characteristic display column 831 is displayed when the master condition is selected by the button 822, and the inspection wafer display marker 832 is automatically displayed when the wafer film thickness is input to the wafer designation column 812.
- a button 842 is a button for making a transition to the master condition setting screen of FIG. 7, and a button 841 is a button for executing an inspection under a designated wafer and master condition.
- the relationship between the film thickness and the scattering intensity in the inspection apparatus is calculated, and the scattering intensity is divided into a plurality of areas according to the intensity, an inspection condition is created for each divided area, and the inspection condition is set for each of the divided scattering intensity areas.
- 901 is an inspection apparatus using the present invention
- 902 is an inspection apparatus using the present invention or an inspection apparatus for inspecting a substrate after pattern formation
- 903 is a network such as the Internet
- 904 is a server.
- the scattering intensity having a fluctuation range is divided into a plurality of regions according to the intensity, and the inspection is performed under the same common conditions. Therefore, the inspection result by the optical wafer surface inspection apparatus 100 has an error. May occur. A method for reducing the error and an example thereof are shown in FIGS.
- Fig. 10 shows the outline of the technique for reducing the error.
- the simulation data 1001 is simulation data created from the result calculated by the simulator 111
- the actual measurement data 1002 is device actual measurement data created from the result of measuring a standard sample with the device.
- the reference film thickness 1004 is designated from the scattering intensity characteristics 1003 with respect to the film thickness for each film type calculated by the simulator 111.
- the scattering intensity 1005 for each particle size of the designated reference film thickness 1004 is calculated from the scattering intensity characteristic 1003 for the film thickness, and a sensitivity curve (simulation) 1006 is created from the relationship between the particle size and the scattering intensity in the reference film thickness 1004.
- the scattering intensity 1008 of each particle size corresponding to the film thickness 1007 of the measurement sample is calculated from the scattering intensity characteristic 1003 with respect to the film thickness, and the calculated scattering intensity 1008 of each particle size is calculated using a sensitivity curve (simulation) 1006. Convert to size.
- the converted size is converted into an AD value 1010 using a sensitivity curve (actual measurement) 1009 created by actual measurement with the optical wafer surface inspection apparatus 100.
- the AD value 1010 is calculated for the other particles of the measurement sample, and the correspondence table 1011 of the particle size and AD value is created, so that the relationship between the particle size and the scattering intensity necessary for creating the inspection condition can be obtained.
- the required sensitivity curve is obtained.
- this method uses a sensitivity curve (actual measurement) 1009 obtained from the relationship between the actual measurement value and the particle size created for each inspection apparatus, it is difficult to be influenced by machine differences for each inspection apparatus.
- FIG. 11 is a sensitivity curve calculation result screen required when inspecting with the optical wafer surface inspection apparatus 100 calculated using the scattering intensity characteristic 1003 with respect to the film thickness for each film type calculated by the simulator 111.
- the reference recipe information field 1101, the sensitivity curve calculation parameter field 1102, and the sensitivity curve calculation result display field 1103 are configured. From the reference recipe setting button 1118, the reference recipe setting screen shown in FIGS. 12 to 13 is displayed from the recipe output button 1119.
- the recipe output setting screen shown in FIG. 14 can be opened.
- the condition name of the reference recipe set in the reference recipe setting shown in FIGS. 12 to 13 is displayed in the condition name display column 1104, the film type name is displayed in the film type name display column 1105, and the sensitivity curve (actual measurement).
- the name is displayed in the actual measurement data name display column 1106, and the sensitivity curve (simulation) name created from the scattering intensity characteristic data for the film thickness for each film type is displayed in the Sim data display column 1107, respectively.
- the sensitivity curve calculation parameter column 1102 includes a refractive index (n) input column 1108 and a refractive index (k) input column 1109 for inputting an actual measured value of the refractive index of the target film type.
- the AD value correction coefficient field includes a low angle AD value correction coefficient input field 1110 and a high angle AD value correction coefficient input field 1111, and a correction value 1703 derived from a comparison result between an actual measurement value and a simulation value described later is input.
- the AD value effective range also includes a low angle AD value effective range 1112 and a high angle AD value effective range 1113, and the AD value reflected in the recipe is reflected on the low angle AD value calculation result 1115 and the high angle AD value calculation result 1116. Set the range.
- the value outside the set AD value effective range indicates that the value is not suitable for creating the inspection condition of the optical wafer surface inspection apparatus 100 by changing the cell color or the like.
- the sensitivity curve calculation result display column 1103 has a film thickness input column 1114.
- the low angle AD value calculation result display column 1115 displays the low angle AD value calculation result.
- the calculation result display field 1116 displays a high angle AD value calculation result.
- a sensitivity curve graph 1117 is a graph showing the low angle AD value calculation result 1115 and the high angle AD value calculation result 1116.
- Figure 12 shows the standard recipe setting screen.
- the reference recipe setting screen includes an actual measurement data tab 1201 and a Sim data tab 1202, and when each tab is clicked, the screen is switched and each can be set.
- a recipe selection button 1203 in the actual measurement data tab 1201 is clicked, when a standard recipe created by inspecting a standard sample with a reference film thickness 1004 by the optical wafer surface inspection apparatus 100 is selected, the recipe name, sensitivity condition name, The low angle sensitivity curve name and the high angle sensitivity curve name are displayed in the reference recipe (actual measurement) information column 1204, respectively, and the sensitivity curves registered in the reference recipe are displayed in the low angle sensitivity curve graph 1205 and the high angle sensitivity curve graph 1206. Is done.
- the recipe selected by the recipe selection button 1203 is set as the reference recipe, and the screen returns to the sensitivity curve calculation result screen of FIG. 11 sensitivity curve calculation result screen.
- the Cancel button 1208 is clicked, the selected recipe is not set as the reference recipe, but returns to the original reference recipe setting and returns to the sensitivity curve calculation result screen of the sensitivity curve calculation result screen in FIG.
- the reference recipe selection by the recipe selection button 1203 will be described in detail.
- a recipe selection button 1203 on the actual measurement data tab 1201 is clicked, the recipe selection screen in FIG. 13 is opened.
- a reference recipe is selected from the recipe list 1301 and an OK button 1303 is clicked, the designated recipe can be read and set as a reference recipe.
- the Cancel button 1304 is clicked, the reference recipe recipe setting is not changed, and the screen returns to the reference recipe setting screen of FIG.
- a recipe file is stored in multiple folders, or when a reference recipe is set by reading a recipe file stored in another folder, a recipe folder for specifying the stored folder
- a selection button 1302 is clicked to specify a folder in which the recipe file is stored.
- the folder storing the recipe file is designated, the recipe stored in the folder is displayed in the recipe list, and the reference recipe can be selected from the list.
- the screen is switched to the simulation data setting screen in FIG. Since the scattering intensity characteristic 1003 for the film thickness for each film type calculated by the simulator 111 has different data depending on the configuration of the inspection apparatus, it is necessary to prepare the scattering intensity characteristic 1003 for the film thickness for each film type for each inspection apparatus configuration. Yes, it is necessary to select the scattering intensity characteristic 1003 for the film thickness for each film type in accordance with the configuration of the inspection apparatus.
- An inspection apparatus to be used for inspection is selected from the pull-down menu 1401, and a target film type is selected from the pull-down menu 1402.
- the simulation condition of the scattering intensity characteristic 1003 with respect to the film thickness for each film type selected from the pull-down menus 1401 and 1402 is displayed in the simulation condition display field 1404. Items displayed in the simulation condition display field 1404 may include optical conditions, the refractive index of the target film type, film thickness, particle size, and the like. Further, a graph of the scattering intensity characteristic 1003 against the film thickness of the inspection apparatus and film type selected by the pull-down menu 1401 and the pull-down menu 1402 is displayed in the low angle scattering intensity characteristic graph 1405 and the high angle scattering intensity characteristic graph 1406.
- the data of the scattering intensity characteristic 1003 with respect to the film thickness for each film type separately created by clicking the Sim data acquisition button 1403 is clicked.
- the Sim data list button 1407 is clicked, a simulation data list screen shown in FIG. 15 is displayed, and a list 1502 of scattering intensity characteristics 1003 with respect to film thickness for each registered film type can be displayed.
- the target inspection apparatus is switched using the pull-down menu 1501, so that the film thickness for each film type corresponding to the selected inspection apparatus is selected.
- a list 1502 of scattering intensity characteristics 1003 is displayed.
- an OK button 1503 is clicked, the screen returns to the reference recipe setting screen of FIG.
- the recipe output setting screen FIG. 16 includes an inspection condition display field 1601, a recipe name input field 1602, a sensitivity curve setting field 1603, and a CH setting field 1604.
- the inspection condition display field 1601 displays various inspection conditions 1605 such as laser power and detector parameters of the optical wafer surface inspection apparatus 100 for obtaining an AD value for each particle size set in the sensitivity curve setting field 1603.
- the recipe name input field 1602 includes a recipe name input field 1606, a low angle sensitivity curve name input field 1607, and a high angle sensitivity curve input field 1608, which are used when outputting the created recipe, low angle sensitivity curve, and high angle sensitivity curve.
- a name can be specified.
- the recipe name input field 1602 includes a low angle sensitivity curve field 1609 and a high angle sensitivity curve field for each particle size of the low angle and the high angle in the specified film thickness calculated on the sensitivity curve calculation result screen shown in FIG. 1610 is displayed.
- the AD values of other particle sizes are set at a low angle based on the input AD value.
- the inspection condition update button 1611 is clicked, the inspection conditions necessary for obtaining the set AD value by the inspection of the optical wafer surface inspection apparatus 100 are calculated, and the inspection condition display field 1605 is displayed.
- the CH setting field 1604 includes a low angle CH setting field 1612 and a high angle CH setting field 1613 for displaying the number of detections for each size when the inspection result of the optical wafer surface inspection apparatus 100 is output. Can be set for each of a low angle and a high angle.
- the inspection conditions and sensitivity curves calculated are determined by clicking the recipe output button 1614, and the inspection conditions of the optical wafer surface inspection apparatus 100 including the low angle sensitivity curve 1609 and the high angle sensitivity curve 1610 are displayed in the recipe name input field.
- the sensitivity curve output button 1615 is clicked, the low angle sensitivity curve name input in the low angle sensitivity curve name input field 1607 and the high angle sensitivity curve specified in the high angle sensitivity curve name input field 1608 are output. Output by name.
- the screen returns to the sensitivity curve calculation result screen of FIG.
- FIG. 17 is a calculation example of the AD value correction coefficient in the sensitivity curve calculation result screen of FIG.
- wafers coated with a plurality of standard particles are prepared for a plurality of film thicknesses, and these wafers are inspected by the optical wafer surface inspection apparatus 100.
- the inspection result when the wafer of each film type and film thickness is inspected by the optical wafer surface inspection apparatus 100 is calculated by the simulator 111.
- the value measured by the inspection apparatus is taken on the X axis, and the simulator is taken on the Y axis.
- the value calculated in 111 is taken, the size 1701 of each particle is plotted, and the slope 1703 of the approximate line straight line 1702 is calculated by the least square method or the like. This inclination becomes an AD value correction coefficient.
- FIG. 18 shows a comparison between the conventional method and the new method according to the present invention using a flowchart.
- standard samples of all film thicknesses that require recipe creation are prepared S100, and standard particles of a plurality of sizes are applied S110 to these samples.
- standard particles of a plurality of sizes are applied to all these samples, and actual measurement S120 is performed by the apparatus.
- the conventional method prepares samples of all film thicknesses, measures them with an apparatus, optimizes various apparatus parameters, and determines the sensitivity curve from the relationship between the particle size and scattering intensity of all film thickness samples. It is necessary to create S130. The inspection is carried out using various apparatus parameters and sensitivity curves optimized in this way.
- the scattering intensity by simulation is changed even if the film thickness of the measurement sample changes.
- the work time required for the sensitivity curve creation S170 from the scattering intensity calculation S160 by simulation and the scattering intensity by simulation is 2 minutes.
- the work time required for the new method is “2 hours + 2”, which is the total of “2 minutes ⁇ number of film thicknesses” of the simulation calculation work time required when the film thickness changes as “2 hours” required for creating the reference conditions.
- Min x number of film thickness " compared to the conventional method of" 2 hours x number of film thickness ", the standard particle coating work and the actual measurement with the device only need to be performed once for each film type, so the work time is greatly increased.
- the number of samples that need to be prepared is conventionally only one for each film thickness, and the cost required for the samples can be greatly reduced.
- FIG. 1 shows the form in which the function of the present invention is incorporated in the inspection apparatus as the first embodiment in FIG. 1, but the second embodiment is a form in which the function of the present invention is an independent inspection condition creation support tool.
- Each device and the inspection condition creation support tool are connected by a network 130.
- a scattering intensity characteristic with respect to the film thickness for each film type calculated by the simulator 111 is included in the inspection condition creation support tool, and the scattering intensity characteristic with respect to the film thickness for each film type calculated by the simulator 111 can be additionally acquired.
- the fluctuation range of the scattering intensity is divided into a plurality of regions according to the intensity based on the relationship between the film thickness of the film formed on the substrate and the scattering intensity.
- the sensitivity curve obtained from the relationship between the particle size and the scattering intensity (the sensitivity curve obtained from the relationship between the particle size and the scattering intensity is sometimes referred to as a calibration curve) is used. To convert to size.
- the inspection conditions are made common for each of the divided scattering intensity regions, and the inspection is performed under the common inspection conditions. 5). Above 1.
- an inspection condition suitable for a substrate to be inspected is selected from inspection conditions common to the divided scattering intensity regions, and the inspection is performed. 6). Above 1.
- An inspection apparatus for inspecting defects on a substrate using light comprising: a light detection section; and a control section for controlling the inspection apparatus based on a detection signal from the light detection section, wherein the control section A process of dividing the fluctuation range of the scattering intensity into a plurality of regions according to the intensity based on the relationship between the film thickness of the film formed on the substrate obtained based on the detection signal and the scattering intensity. 8). Above 7. In this method, the scattering intensity fluctuation range is converted into a size by using a sensitivity curve (calibration curve) obtained from the relationship between the particle size and the scattering intensity. 9. Above 7.
- the inspection conditions are made common for each of the divided scattering intensity regions, and the inspection is performed under the common inspection conditions.
- the inspection conditions suitable for the substrate to be inspected are selected from the inspection conditions common to the divided scattering intensity regions, and the inspection is performed.
- 12 Above 7. And displaying a film thickness necessary for creating an inspection condition to be shared for each of the divided scattering intensity regions.
- An inspection system comprising: the inspection apparatus; a database connected to the inspection apparatus; and a simulator connected to the database. 14 13. above.
- the control unit of the inspection apparatus controls the inspection apparatus based on a signal from the database. 15.
- the measurement range of the light scattering intensity is divided, an inspection condition is set for each of the divided measurement ranges, and the inspection condition for each of the divided measurement ranges is used.
- the inspection condition is an inspection recipe.
- the present invention is suitable for use in semiconductor element inspection / measurement and semiconductor manufacturing process management in the semiconductor element manufacturing field.
- the configuration of the inspection apparatus is not limited to the configuration of the present embodiment, and the inspection target is not limited to the wafer, but may be a hard disk substrate or the like.
- Network 904 Server 1011 Simulation data 1002 Actual measurement data 1003 Scattering intensity characteristic 1004 for each film type Reference thickness 1005 Scattering intensity 1006 for each particle size Sensitivity curve (simulation) 1007 Film thickness of measurement sample 1008 Scattering intensity of each particle size of measurement sample 1009 Sensitivity curve (actual measurement) 1010 AD value 1011 Correspondence table 1101 of particle size and AD value 1101 Reference recipe information field 1102 Sensitivity curve calculation parameter field 1103 Sensitivity curve calculation result display field 1104 Condition name display field 1105 Film type name display field 1106 Actual data Name display field 1107 Sim data display field 1108 Refractive index (n) input field 1109 Refractive index (k) 1110 Low angle AD value correction coefficient input field 1111 High angle AD value correction coefficient input field 1112 Low angle AD value effective range 1113 High angle AD value effective range 1114 Film thickness input field 1115 Low angle AD value calculation result display field 1116 High angle AD Value calculation result 1117 Sensitivity curve graph 1118 Reference recipe setting button 1119 Recipe output button 1201 Actual
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Abstract
Description
本発明の第9の特徴は、基準となる検査条件と、対応するシミュレーションデータと実測データとを用いて算出した粒子サイズに対応した散乱強度と、検査で使用する検査条件を算出することにある。
本手法の一例について、図9を用いて説明する。
1.光を用いて基板の欠陥を検査する検査方法において、前記基板上に形成された膜の膜厚と散乱強度の関係に基づき、前記散乱強度の変動幅を強度別に複数の領域に分割すること。
2.上記1.において、前記散乱強度変動幅を粒子サイズと散乱強度との関係から求めた感度カーブ(粒子サイズと散乱強度との関係から求めた感度カーブのことを、検量線と呼ばれることもある。)を用いることでサイズに変換すること。
3.上記1.において、前記分割後の変動幅または散乱強度変動幅の分割数の何れかに基づいて、前記散乱強度の変動幅を、複数に分割すること。
4.上記1.において、前記分割した散乱強度領域毎に検査条件を共通化し、共通化した検査条件で検査を実施すること。
5.上記1.において、前記分割した散乱強度領域毎に共通化した検査条件の中から、検査対象の基板に適する検査条件を選定し検査を実施することを特徴とする検査方法。
6.上記1.において、前記分割した散乱強度領域毎に共通化する検査条件の作成に必要な膜厚を表示することを特徴とする検査方法。
7.光を用いて基板の欠陥を検査する検査装置であって、光検出部と、前記光検出部からの検出信号に基づいて検査装置を制御する制御部とを有し、前記制御部は、前記検出信号に基づいて得られた前記基板上に形成された膜の膜厚と散乱強度の関係に基づき、前記散乱強度の変動幅を強度別に複数の領域に分割する処理を行うこと。
8.上記7.において、前記散乱強度変動幅を粒子サイズと散乱強度との関係から求めた感度カーブ(検量線)を用いることでサイズに変換すること。
9.上記7.において、前記分割後の変動幅または散乱強度変動幅の分割数の何れかに基づいて、前記散乱強度の変動幅を、複数に分割すること。
10.上記7.において、前記分割した散乱強度領域毎に検査条件を共通化し、共通化した検査条件で検査を実施すること。
11.上記7.において、前記分割した散乱強度領域毎に共通化した検査条件の中から、検査対象の基板に適する検査条件を選定し検査を実施すること。
12.上記7.において、前記分割した散乱強度領域毎に共通化する検査条件の作成に必要な膜厚を表示すること。
13.上記7.の検査装置と、前記検査装置に接続されたデータベースと、前記データベースに接続されたシミュレータとを有する検査システムを構成すること。
14.上記13.において、前記検査装置の前記制御部は、前記データベースからの信号に基づいて、前記検査装置を制御すること。
15.光を用いて基板の欠陥を検査する検査方法において、前記光の散乱強度の測定レンジを分割し、前記分割した測定レンジごとに検査条件を設定し、前記分割した測定レンジごとの検査条件を用いて欠陥の検査を行こと。
16.上記15.において、前記検査条件は、検査レシピであること。
101 レビューSEM
102 CD-SEM
103 データサーバ
104 電気テスト装置
105 分析装置
111 シミュレータ
120 ネットワーク
200 ウェハ
211 資料ステージ
212 回転軸
213 回転駆動部
214 スライド駆動部
220 照明光源
221 照明光
230 散乱光検出部
231a~d 検出器
232a~d 増幅器
233a~d A/Dコンバータ
240 信号合成部
250 全体制御部
260 ステージ制御部
270 情報表示部
280 入力操作部
290 記憶部
310 基準検査条件検査手順
320 レーザーパワー決定手順
330 偏光条件決定手順
340 検出器感度調整手順
350 感度カーブ作成手順
360 検出器しきい値設定手順
370 検査条件完成
410 サンプルデータ表示欄
411 膜種選択ボタン
412 膜種表示欄
413 屈折率表示欄
414 偏光比較タブ
415 散乱特性タブ
416 感度カーブタブ
417 グラフ設定表示欄
418 粒子サイズ選択プルダウンメニュー
419 偏光条件選択チェックボックス
420 散乱強度表示範囲指定欄
421 膜厚表示範囲指定欄
422 散乱強度特性表示欄
423 散乱特性データ
424 偏光条件凡例
510 サンプルデータ表示欄
511 散乱特性タブ
512 グラフ設定欄
513 偏光条件選択プルダウンメニュー
514 粒子サイズ選択チェックボックス
515 散乱強度表示範囲指定欄
516 膜厚表示範囲指定欄
517 散乱強度特性表示欄
518 粒子サイズ凡例
519 散乱特性データ
610 感度カーブタブ
611 グラフ設定欄
612 偏光条件選択プルダウンメニュー
613 膜厚選択チェックボックス
614 散乱強度表示範囲指定欄
615 粒子サイズ表示範囲指定欄
616 感度カーブ表示欄
617 膜厚凡例
618 感度カーブ
710 マスタ条件設定欄
711 条件保存ボタン
712 条件読み込みボタン
713 条件名入力ボックス
714 膜種選択プルダウンメニュー
715 粒経選択プルダウンメニュー
716 条件登録ボタン
717~721 登録条件選択プルダウンメニュー
730 領域分割設定欄
731 領域分割実行ボタン
732 自動領域分割ボタン
733 領域分割方法選択ラジオボタン
734 領域分割数入力ボックス
735 サイズ誤差入力ボックス
736 サイズ誤差算出結果表示ボックス
737 領域分割数算出結果表示ボックス
738 散乱強度分割結果
739 散乱強度特性
740 サイズ誤差範囲
741 共通レシピの膜厚適用範囲
750 条件作成候補表示欄
751 条件作成候補膜厚
810 サンプル指定欄
811 ローダ選択ボタン
812 ウェハ指定欄
821 マスタ条件情報表示欄
822 マスタ条件読み込みボタン
823 マスタ条件名表示欄
824 膜種表示欄
825 検出感度選択プルダウンメニュー
826 領域分割数表示欄
827 サイズ誤差表示欄
831 散乱強度特性表示欄
832 検査ウェハ表示マーカ
841 検査開始ボタン
842 マスタ条件作成ボタン
901 本発明を用いた検査装置
902 本発明を用いた検査装置またはパターン形成後の基盤を検査する検査装置
903 インターネットなどのネットワーク
904 サーバ
1011 シミュレーションデータ
1002 実測データ
1003 膜種毎の膜厚に対する散乱強度特性
1004 基準膜厚
1005 各粒子サイズに対する散乱強度
1006 感度カーブ(シミュレーション)
1007 測定サンプルの膜厚
1008 測定サンプルの各粒子サイズの散乱強度
1009 感度カーブ(実測)
1010 AD値
1011 粒子サイズとAD値の対応表
1101 基準レシピ情報欄
1102 感度カーブ算出パラメータ欄
1103 感度カーブ算出結果表示欄
1104 基準レシピの条件名を条件名表示欄
1105 膜種名表示欄
1106 実測データ名表示欄
1107 Simデータ表示欄
1108 屈折率(n)入力欄
1109 屈折率(k)
1110 低角度AD値補正係数入力欄
1111 高角度AD値補正係数入力欄
1112 低角度AD値有効範囲
1113 高角度AD値有効範囲
1114 膜厚入力欄
1115 低角度AD値算出結果表示欄
1116 高角度AD値算出結果
1117 感度カーブグラフ
1118 基準レシピ設定ボタン
1119 レシピ出力ボタン
1201 実測データタブ
1202 Simデータタブ
1203 レシピ選択ボタン
1204 基準レシピ(実測)情報欄
1205 低角度感度カーブグラフ
1206 高角度感度カーブグラフ
1207 OKボタン
1208 Cancelボタン
1301 レシピ一覧
1302 レシピフォルダ選択ボタン
1303 OKボタン
1304 Cancelボタン
1401 プルダウンメニュー
1402 プルダウンメニュー
1403 Simデータ取り込みボタン
1404 シミュレーション条件表示欄
1405 低角度散乱強度特性グラフ
1406 高角度散乱強度特性グラフ
1407 Simデータ一覧ボタン
1501 プルダウンメニュー
1502 膜種毎の膜厚に対する散乱強度特性一覧
1503 OKボタン
1601 検査条件表示欄
1602 レシピ名入力欄
1603 感度カーブ設定欄
1604 CH設定欄
1605 検査条件
1606 レシピ名入力欄
1607 低角度感度カーブ名入力欄
1608 高角度感度カーブ入力欄
1609 低角度感度カーブ欄
1610 高角度感度カーブ欄
1611 検査条件更新ボタン
1612 低角度CH設定欄
1613 高角度CH設定欄
1614 レシピ出力ボタン
1701 各粒子のサイズ
1702 近似線直線
1703 近似線直線の傾き
Claims (25)
- 光を用いて基板の欠陥を検査する検査方法において、
前記基板上に形成される膜の膜厚と散乱強度の関係に基づき、
前記散乱強度の変動幅を強度別に複数の領域に分割することを特徴とする検査方法。 - 請求項1に記載の検査方法において、
前記散乱強度変動幅を粒子サイズと散乱強度との関係から求めた感度カーブを用いることでサイズに変換することを特徴とする検査方法。 - 請求項1に記載の検査方法において、
前記分割後の変動幅または散乱強度変動幅の分割数の何れかに基づいて、前記散乱強度の変動幅を、複数に分割することを特徴とする検査方法。 - 請求項1に記載の検査方法において、
前記分割した散乱強度領域毎に検査条件を共通化し、共通化した検査条件で検査を実施することを特徴とする検査方法。 - 請求項1に記載の検査方法において、
前記分割した散乱強度領域毎に共通化した検査条件の中から、検査対象の基板に適する検査条件を選定し検査することを特徴とする検査方法。 - 請求項1に記載の検査方法において、
前記分割した散乱強度領域毎に共通化する検査条件の作成に必要な膜厚を表示することを特徴とする検査方法。 - 光を用いて基板の欠陥を検査する検査装置であって、
光検出部と
前記光検出部からの検出信号に基づいて検査装置を制御する制御部とを有し、
前記制御部は、前記検出信号に基づいて得られた前記基板上に形成される膜の膜厚と
散乱強度の関係に基づき、前記散乱強度の変動幅を強度別に複数の領域に分割する処理を行う処理部を有することを特徴とする検査装置。 - 請求項7に記載の検査装置おいて、
前記散乱強度変動幅を粒子サイズと散乱強度との関係から求めた感度カーブを用いることでサイズに変換することを特徴とする検査装置。 - 請求項7に記載の検査装置おいて、
前記分割後の変動幅または散乱強度変動幅の分割数の何れかに基づいて、前記散乱強度の変動幅を、複数に分割することを特徴とする検査装置。 - 請求項7に記載の検査装置おいて、
前記分割した散乱強度領域毎に検査条件を共通化し、共通化した検査条件で検査することを特徴とする検査装置。 - 請求項7に記載の検査装置おいて、
前記分割した散乱強度領域毎に共通化した検査条件の中から、検査対象の基板に適する検査条件を選定し検査を実施することを特徴とする検査装置。 - 請求項7に記載の検査装置おいて、
前記分割した散乱強度領域毎に共通化する検査条件の作成に必要な膜厚を表示することを特徴とする検査装置。 - 請求項7に記載の検査装置おいて、
シミュレーションデータと実測データを用いて
粒子サイズに対応した散乱強度を算出することを特徴とする検査装置。 - 請求項7に記載の検査装置において、
基準となる検査条件と、
対応するシミュレーションデータと実測データとを用いて算出した粒子サイズに対応した散乱強度と、を使用して、
検査で使用する検査条件を算出することを特徴とする検査装置。 - 請求項7に記載の検査装置において、
屈折率を用いてシミュレーション結果を補正し、
粒子サイズに対応した散乱強度を算出することを特徴とする検査装置。 - 請求項7に記載の検査装置において、
実測値とシミュレーション値との比較結果から得られた補正係数を散乱強度の算出式に反映し、粒子サイズに対応した散乱強度の算出することを特徴とする検査装置。 - 請求項7記載の検査装置と、
前記検査装置に接続されるデータベースと、
前記データベースに接続されるシミュレータとを有することを特徴とする検査システム。 - 請求項17に記載の検査システムにおいて、
前記検査装置の前記制御部は、
前記データベースからの信号に基づいて、
前記検査装置を制御することを特徴とする検査システム。 - 光を用いて基板の欠陥を検査する検査方法において、
前記光の散乱強度の測定レンジを分割し、
前記分割した測定レンジごとに検査条件を設定し、
前記分割した測定レンジごとの検査条件を用いて欠陥の検査を行うことを特徴とする検査方法。 - 請求項19に記載の検査方法において、
前記検査条件は、検査レシピであることを特徴とする検査方法。 - 請求項19に記載の検査方法において、
シミュレーションデータと実測データを用いて
膜厚における、粒子サイズに対応した散乱強度を算出することを特徴とする検査方法。 - 請求項19に記載の検査方法において、
基準となる検査条件を設定し、
対応するシミュレーションデータと実測データを用いて粒子サイズに対応した散乱強度を算出し、
検査に使用する検査条件を算出することを特徴とする検査方法。 - 請求項19に記載の検査方法において、
屈折率を用いてシミュレーション結果を補正し、
粒子サイズに対応した散乱強度の算出することを特徴とする検査方法。 - 請求項19に記載の検査方法において、
実測値とシミュレーション値との比較結果から得られた補正係数を散乱強度の算出式に反映し、
粒子サイズに対応した散乱強度の算出することを特徴とする検査方法。 - 請求項21に記載の検査方法において、
シミュレータで算出したシミュレーションデータを取り込み、
前記シミュレーションデータを追加することを特徴とする検査方法。
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US9665668B2 (en) * | 2012-02-29 | 2017-05-30 | Applied Materials, Inc. | Configuring a dispatching rule for execution in a simulation |
US9404743B2 (en) * | 2012-11-01 | 2016-08-02 | Taiwan Semiconductor Manufacturing Company, Ltd. | Method for validating measurement data |
US8830464B2 (en) * | 2012-11-06 | 2014-09-09 | Kla-Tencor Corporation | Film thickness, refractive index, and extinction coefficient determination for film curve creation and defect sizing in real time |
US9098894B2 (en) * | 2013-02-01 | 2015-08-04 | Taiwan Semiconductor Manufacturing Company, Ltd. | Defect determination in integrated circuit manufacturing process |
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JPH04109108A (ja) * | 1990-08-30 | 1992-04-10 | Toshiba Corp | 異物検査装置 |
JPH0743310A (ja) * | 1993-07-27 | 1995-02-14 | Matsushita Electron Corp | パーティクル検査方法 |
JP2003185588A (ja) * | 2001-12-14 | 2003-07-03 | Mitsubishi Electric Corp | 異物検査装置の校正方法 |
JP2008032600A (ja) * | 2006-07-31 | 2008-02-14 | Hitachi High-Technologies Corp | 外観検査装置 |
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JP4734002B2 (ja) | 2005-03-16 | 2011-07-27 | 株式会社東芝 | 検査システム及び半導体装置の製造方法 |
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JPH04109108A (ja) * | 1990-08-30 | 1992-04-10 | Toshiba Corp | 異物検査装置 |
JPH0743310A (ja) * | 1993-07-27 | 1995-02-14 | Matsushita Electron Corp | パーティクル検査方法 |
JP2003185588A (ja) * | 2001-12-14 | 2003-07-03 | Mitsubishi Electric Corp | 異物検査装置の校正方法 |
JP2008032600A (ja) * | 2006-07-31 | 2008-02-14 | Hitachi High-Technologies Corp | 外観検査装置 |
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JP5216869B2 (ja) | 2013-06-19 |
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