WO2002021111A1 - Appareil d'inspection de la surface de plaquettes, procede d'inspection de la surface de plaquettes, appareil d'estimation de plaquettes defectueuses, procede d'estimation de plaquette defectueuse et appareil de traitement d'informations sur la surface de plaquettes - Google Patents
Appareil d'inspection de la surface de plaquettes, procede d'inspection de la surface de plaquettes, appareil d'estimation de plaquettes defectueuses, procede d'estimation de plaquette defectueuse et appareil de traitement d'informations sur la surface de plaquettes Download PDFInfo
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- WO2002021111A1 WO2002021111A1 PCT/JP2001/007699 JP0107699W WO0221111A1 WO 2002021111 A1 WO2002021111 A1 WO 2002021111A1 JP 0107699 W JP0107699 W JP 0107699W WO 0221111 A1 WO0221111 A1 WO 0221111A1
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- wafer
- information
- wafer surface
- scratches
- surface information
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Classifications
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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
- H01L22/20—Sequence of activities consisting of a plurality of measurements, corrections, marking or sorting steps
-
- 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
- G01N21/956—Inspecting patterns on the surface of objects
-
- 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
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
- G01N2021/8854—Grading and classifying of flaws
- G01N2021/8861—Determining coordinates of flaws
Definitions
- Wafer surface inspection device Description Wafer surface inspection device, wafer surface inspection method, defective wafer determination device, defective wafer determination method, and wafer surface information processing device
- the present invention relates to a wafer surface inspection apparatus and method for inspecting a silicon wafer surface for the presence or absence of scratches and scratches, capable of extracting ⁇ defects such as scratches and scratches and classifying the defects.
- the present invention also relates to an apparatus and a method for determining a defective wafer based on a scratch on the surface of a silicon wafer, wherein the determination can be performed according to the type of a defect such as a scratch or a scratch.
- the present invention provides a wafer surface information processing apparatus for accumulating wafer surface information such as scratch information and scratch information on a wafer surface detected by a wafer surface inspection apparatus and utilizing the information in a wafer processing step or other steps.
- a wafer surface information processing apparatus for accumulating wafer surface information such as scratch information and scratch information on a wafer surface detected by a wafer surface inspection apparatus and utilizing the information in a wafer processing step or other steps.
- a polishing liquid containing an abrasive with a fine particle diameter was used for a silicon wafer cut from a silicon ingot pulled up by the cz (Chiyoklarsky) method or the like.
- the surface is mirror-finished by lapping.
- the silicon wafers whose surfaces have been finished in this way are subjected to a cleaning process and then visually inspected by the operator, and only those wafers judged to be free from scratches and stains are shipped as non-defective products.
- the present invention has been made in view of the above problems, and a first object is to It is an object of the present invention to provide a wafer surface inspection apparatus and method capable of reliably detecting a defective scratch.
- a second object is to provide an apparatus and a method for determining a defective wafer, which can reliably detect a defective wafer to be determined to be defective according to its characteristic amount.
- a third object is to provide a wafer surface information processing device that accumulates wafer surface information and uses it in a wafer processing step or other steps.
- the wafer supplier the wafer maker
- the wafer supplier will supply wafers of a quality that can accurately respond to the needs of the user. This also makes it easier for users to communicate their requirements to the wafer supplier.
- the present invention has been made in view of the above problems, and a fourth object is to easily detect the tendency of scratches and spiders to occur in a predetermined process, and at the same time, to transmit information about the tendency to the wafer supplier.
- the purpose is to provide a system that can be freely exchanged with the consumer. Disclosure of the invention
- the wafer surface inspection apparatus detects, from distribution information of fine point defects (LPDs) on the surface of a silicon wafer, an aggregate of unevenly distributed LPDs as scratches. And a means for reliably detecting those defects that should be defective.
- LPDs fine point defects
- the present invention provides the following wafer surface inspection apparatus and wafer surface inspection method.
- a wafer surface inspection apparatus for detecting a flaw on the wafer surface based on a report comprising: input means for receiving the LPD map supplied from the particle counter; A storage means capable of storing the LPD map for a plurality of wafers, and an information processing for detecting a flaw on the wafer surface by detecting an uneven distribution of the LPD in the LPD map stored in the storage means.
- Means comprising: a wafer surface inspection apparatus.
- Particle count refers to detecting scattered light obtained from the wafer surface when the wafer surface is irradiated with laser light, and a commercially available one can be used.
- the main function of this inspection device is to judge the quality of each scattering point (LPD: Light Point Defect) as an individual defect, and recognize this as a linear scratch from the two-dimensional gathering state of the LPD. It was difficult to perform the same inspections as those performed by humans when determining whether the scratches were to be defective or not. For this reason, it is necessary for the worker to look at this map to detect flaws and judge defects, etc., and it is still insufficient in that the inspection can be performed without human intervention. That is, although the current inspection device could not automatically recognize the scratches made up of an aggregate of LPDs from the LPD map as such, the inspection device according to the present invention can do so.
- the aggregate of LPDs on the wafer surface may be continuous or discontinuous.
- the arrangement may be a straight line or a curved line.
- "Scratch” refers to various forms of defects, such as a collection of defects on the wafer surface or scratches on the wafer surface.
- “storage means capable of accumulating a plurality of wafers” means that accumulation is possible for a plurality of wafers or a single wafer.
- the information processing means smoothes the LPD map by spatial filling.
- the wafer surface inspection apparatus according to (1) wherein the result of binarization is binarized with a predetermined threshold value to detect the aggregate of the LPDs separately from its surroundings.
- a wafer surface inspection method for detecting flaws on the wafer surface based on the two-dimensional defect distribution information (LPD map) on the wafer surface supplied from the particle computer, which is extracted from the wafer surface.
- a wafer surface inspection method comprising detecting an uneven distribution of LPDs in an LPD map to detect a defect composed of an aggregate of LPDs on the wafer surface.
- the defect (scratch defect) is detected by detecting a set of linearly distributed LPDs by a two-dimensional Hough transform process for each partial area of the LPD map.
- the wafer surface inspection method according to (4) is described in detail below.
- the amorphous aggregate of the LPD can be distinguished from its surroundings and a defect can be identified.
- a computer-readable storage medium storing a program including a detection step for performing the detection.
- the determination apparatus uses a characteristic amount of a scratch extracted based on distribution information of fine point defects (LPD) on a silicon wafer surface to determine those types.
- LPD fine point defects
- the present invention provides the following determination device and determination method.
- a determination device for determining whether or not to allow a wafer having a surface with scratches and dust as a product based on information on the scratch and dust from the wafer surface inspection device; Input means for taking in the information on the scratches and scratches of the supplied wafer; storage means for accumulating the information on the scratches and scratches for each wafer for a plurality of wafers; The type and degree of the flaw are detected from the characteristic amount of the flaw in the information, and the degree of the flaw is detected from the characteristic amount of the flaw in the information stored in the storage means.
- Information processing means for performing the determination based on a criterion according to the type and degree, and / or based on a criterion according to the degree of the detected smear; Determining device, characterized in that it comprises.
- the “wafer surface inspection device” detects the scattered light obtained from the wafer surface when the wafer surface is irradiated with laser light, and a commercially available device can be used.
- the main function of this inspection device is to judge the quality of each scattering point (LPD: Light Point Defect) as an individual defect, and to determine the linear defect from the two-dimensional gathering state of the LPD. It was difficult to recognize as scratches and to perform the same tests as those performed by humans when determining whether the scratches were to be defective. For this reason, it is necessary for an operator to look at this map to detect scratches and judge a defect, etc., which is still insufficient in that inspection and judgment can be performed without manual operation. That is, the current inspection device could not automatically recognize and judge a defect made up of an aggregate of LPDs from the LPD map, but by attaching the determination device according to the present invention, it could do so. Becomes possible.
- the “aggregation of LPDs on the wafer surface” may be continuous or discontinuous; The arrangement may be a straight line or a curved line.
- “Scratch” means various forms such as an aggregate of defects on the wafer surface or a scratch on the wafer surface.
- “Type” means qualitative, and “degree” means quantitative. means.
- “information on scratches and scratches supplied from the wafer surface inspection device” includes visual screen information and numerical information.
- Storage means capable of accumulating a plurality of wafers means that accumulation is possible for a plurality of wafers or a single wafer.
- the characteristic amount of the flaw is one or more selected from the group consisting of a length, a density, a width, a linearity, a circularity, and a position of the flaw. apparatus.
- the feature amount of Yogore is one or more selected from the group consisting of the area, density / density, distribution, shape and position of Yogore.
- the type and degree of the flaw are detected based on the feature amount of the flaw in the wafer surface information (information on the flaw and the flaw on the wafer surface) supplied from the wafer surface inspection apparatus, and the fog in the surface information is detected.
- the degree of the scratch is detected, and based on a criterion corresponding to the type of the scratch, and / or Alternatively, a computer-readable storage medium storing a program including a determination step of determining whether or not to allow the wafer as a product based on a criterion according to the degree of squealing.
- wafer surface information such as scratch information and scratch information on the wafer surface detected by the wafer surface inspection apparatus is particularly used. It is characterized in that it is stored as image information or numerical information, and by superimposing the stored information, it is possible to easily detect the occurrence tendency of scratches in a predetermined process.
- the present invention provides the following wafer surface information processing apparatus.
- Input means for taking in the wafer surface information (scratch information and wafer information on the wafer surface) for each wafer supplied from the wafer surface inspection apparatus, and the wafer surface information for each wafer for a plurality of wafers
- Storage means for storing, superimposing means for superimposing arbitrary wafer surface information stored in the storage means to form superimposed surface information, and display means for displaying the superimposed surface information formed by the superimposing means.
- a data processing means for processing various information.
- the “wafer surface inspection device” detects the scattered light obtained from the wafer surface when the wafer surface is irradiated with laser light, and a commercially available device can be used.
- the main function of this inspection device is to detect each scattering point (LPD: Light Point Defect) as an individual defect.
- the “aggregation (scratch) of LPDs on the wafer surface” may be continuous or discontinuous.
- the arrangement may be a straight line or a curved line.
- “Scratch” refers to various forms of defects, such as a collection of defects on the wafer surface or scratches on the wafer surface.
- the wafer surface information and the superimposed surface information for each wafer are displayed as images on the wafer. Wafer surface information processing device.
- the wafer surface information is stored in association with wafer history information in which a process that each wafer has passed is recorded; and A wafer surface information processing apparatus characterized in that by outputting corresponding wafer surface information, it is possible to assist in judging in which process the scratches adhere.
- a wafer surface information processing apparatus characterized by outputting surface information to assist in determining in which step the scratches are attached.
- a support device for supporting determination of the cause of occurrence of scratches in a wafer manufacturing process comprising: input means, storage means, processing means, and output means; and (17) )
- the “wafer surface information corresponding to the wafer history information” is extracted through the input unit, and the extracted “wafer surface information corresponding to the wafer history information” is stored in the storage unit.
- the processing unit calculates a process in which scratches frequently occur, and outputs the result from the output unit. Support equipment.
- a support device for assisting in determining an insurance amount when a wafer is transferred during wafer transfer comprising: an input unit, a storage unit, a processing unit, and an output unit, and described in (17).
- the “wafer surface information corresponding to the wafer history information” of the wafer surface information processing device is extracted via the input means, and the extracted “wafer history information” is extracted.
- Wafer surface information corresponding to the wafer history information is stored in the storage means, and the amount of insurance money is calculated by the processing means based on the stored "wafer surface information corresponding to wafer history information".
- a support device for outputting a result from the output unit comprising: an input unit, a storage unit, a processing unit, and an output unit, and described in (17).
- a program containing a superimposition process for superimposing the wafer surface information (scratch information and wafer information on the wafer surface) for each wafer supplied from the wafer surface inspection apparatus to form superimposed surface information is stored.
- Computer readable storage medium Computer readable storage medium. .
- Computer-readable storage storing superimposed surface information formed by superimposing the wafer surface information (scratch information and wafer information on the wafer surface) for each wafer supplied from the wafer surface inspection device Medium.
- the wafer surface information (scratch information and wafer information on the wafer surface) for each wafer supplied from the wafer surface inspection device and superimposed surface information formed by superimposing the wafer surface information are obtained.
- a computer-readable storage medium that stores the information.
- the “storage medium” is typically FD, MD, HD, etc., but if it can store data overnight, it is said that it is a portable type and an installation type. Irrespective of the above, and not only those that perform static storage but also those that perform dynamic storage, any form can be employed. “Specific wafer consumer” means a specific customer.
- the wafer surface information such as scratch information and scratch information on the wafer surface detected by the wafer surface inspection apparatus is particularly required.
- the image information By accumulating the image information as image information and superimposing the accumulated image information on each other, it is possible to easily detect the occurrence tendency of scratches in a predetermined process. It is characterized in that it can be shared between the supplier side of c and the consumer side.
- the present invention provides the following.
- Input means for taking in wafer surface information (scratch information and scratch information on the wafer surface) for each wafer supplied from two wafer surface inspection devices, respectively, and the wafer surface information for each wafer Means for accumulating a plurality of wafer surface information on a plurality of wafers; superimposing means for superimposing arbitrary wafer surface information accumulated in the memory means to form superimposed surface information;
- a wafer surface information processing apparatus comprising: display means for displaying wafer surface information or superimposed surface information in comparison with each other; and information processing means for processing various information.
- the “wafer surface information” is typically information on scratches on the wafer surface and information on the surface, but also includes other information such as cloud.
- Display in contrast means a display method such as displaying a pair on a screen or displaying a difference (either image display or data display).
- display includes not only displaying images but also displaying mere images in some form.
- Image display means not just a simple display, but an image display on a CRT or LCD screen.
- the “wafer surface inspection device” detects scratches and dust on the wafer surface based on the LPD map (defect distribution information on the wafer surface supplied from the particle count). Those with the same performance and sensitivity are preferred.
- the wafer surface information and the superimposed surface information for each wafer are displayed as images on the wafer, respectively. Wafer surface information processing device.
- the two wafer surface inspection apparatuses are respectively located at a start point and an end point of a certain wafer processing step. Wafer surface information processing device.
- the two wafer surface inspection apparatuses are respectively installed on a wafer supplier side and a wafer consumer side. Wafer surface information processing device.
- a wafer surface information processing apparatus characterized in that it is capable of performing the following.
- Wafer surface information for each wafer supplied from a plurality of wafer surface inspection devices (scratch information and scraping information on the wafer surface), and superimposed surface information formed by superimposing the wafer surface information;
- the “storage medium” is typically FD, MD, HD, etc., but if it can store data overnight, it is said that it is a portable type and an installation type. Irrespective of the above, and not only those that perform static storage but also those that perform dynamic storage, any form can be employed.
- the wafers installed on the wafer supplier side and the wafer consumer side respectively A computer readable storage of the wafer surface information (wound surface information and scratch information on the wafer surface) supplied from the surface inspection device for each wafer and the superimposed surface information formed by superimposing the wafer surface information.
- Wafer surface information for each wafer (wafer surface information and scratch information) supplied from a wafer surface inspection device installed after a predetermined wafer processing step, and this wafer surface information Is a computer-readable storage medium that stores superimposed surface information formed by superimposing and information indicating a tendency of the occurrence of failure in the process, and is shared by a plurality of wafer surface information processing apparatuses.
- the wafer surface inspection device on the side of the wafer consumer is provided with a transmission device for transmitting the data of the wafer determined to be defective by the wafer consumer, according to (29). Wafer surface information processing device.
- the wafer surface inspection equipment on the wafer supplier side is characterized by being equipped with a receiving device that receives the data of the wafer that the wafer consumer has judged to be defective and transmitted.
- a wafer surface information processing apparatus as described in the above.
- FIG. 1 is a schematic diagram showing an overall configuration of a silicon wafer inspection system according to the present invention.
- FIG. 2 is a block diagram showing a configuration of a computer for determining a defect according to the present invention.
- FIG. 3 is a schematic diagram illustrating an example of detection of an LPD map.
- FIG. 4 is a flowchart showing the procedure of the surface inspection processing of a silicon wafer according to the present invention.
- FIG. 5 is a schematic diagram illustrating a viramid process in the scratch detection process according to the present invention.
- FIG. 6 is a schematic diagram for explaining a rotation projection method in the scratch detection processing according to the present invention.
- FIG. 7 is a schematic diagram for explaining a rotation projection method in the scratch detection processing according to the present invention.
- FIG. 8 is a schematic diagram for explaining a method of reproducing flaws according to the present invention.
- FIG. 9 is a schematic diagram for explaining the method of reproducing flaws according to the present invention.
- FIG. 10 is a schematic diagram for explaining the method of reproducing creatures according to the present invention.
- FIG. 11 is a schematic diagram used to explain a method of reproducing creatures according to the present invention.
- FIG. 12 is a schematic diagram used to explain a method of reproducing creatures according to the present invention.
- FIG. 13 is a schematic diagram used for describing a method for reproducing creatures according to the present invention.
- FIG. 14 is a schematic diagram for explaining the types of scratches according to the present invention.
- FIG. 15 is a schematic diagram showing criteria for detecting flaws and judging defects according to the present invention.
- FIG. 16 is a block diagram showing the overall configuration of a system using the surface information processing device according to the present invention.
- FIG. 17 is a flowchart showing the procedure of the process of specifying a failure occurrence step according to the present invention.
- FIG. 18 is a schematic diagram illustrating a superimposition result of surface information according to the present invention.
- FIG. 19 is a schematic diagram showing surface information and process information according to the present invention.
- FIG. 20 is a flowchart showing another embodiment of the procedure for specifying a failure occurrence step according to the present invention.
- FIG. 21 is a schematic diagram showing a superposition result of the LPD map according to the present invention.
- FIG. 22 is a block diagram showing an embodiment in which a supplier and a consumer according to the present invention are provided with a surface detecting device (laser scattering detecting device).
- FIG. 23 is a schematic diagram showing the overall configuration of a silicon wafer inspection system different from FIG.
- FIG. 24 is a block diagram showing a configuration of a computer for determining a defect different from FIG. 2.
- FIG. 25 is a block diagram showing an embodiment different from FIG. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 is a schematic diagram showing an overall configuration of a silicon wafer surface inspection system 10 according to the present invention.
- the surface inspection system 10 controls the laser scattering detector 11 for extracting minute defects from the surface of the silicon wafer and the laser scattering detector 11.
- a plurality of extraction units 13 each consisting of a control convenience store 12 for collecting the extraction results (LPD maps) from these extraction units 13 via the network 15 to determine the state of the damage condition. It has a computer 21 for judgment.
- Each laser scattering detector 11 of the extraction unit 13 irradiates the surface of the silicon wafer with laser light and detects scattered light generated when there is a defect.
- the laser scattering detector 11 uses a map (LPD map: Light Point Defect map), in which each detected scattering point is an individual defect, to determine a coordinate value in a predetermined coordinate system on the wafer and the intensity of the scattered light. By generating as a set of degrees, minute defects on the silicon wafer surface are extracted.
- LPD map Light Point Defect map
- the information (LPD map) of individual scattering points (defects) on the silicon wafer surface extracted in this way is stored in the hard disk provided in each laser scattering detector 11 O (not shown) or directly on the hard disk of the judgment console 21 via the network 15 in association with the wafer ID, slot number, and the like.
- the determination computer 21 is constructed by Ethernet with the wafer ID and slot number of the silicon wafer to be determined from each control computer 12 and the scattering point information (LPD map) associated with the wafer ID and slot number. From the corresponding laser scattering detector 11 via a LAN (Local Area Network) (network 15).
- LAN Local Area Network
- the judgment computer 21 that obtains such information is used. Is designed to convert such information into a common data format and handle it.
- the computer 21 for determination is connected to a computer-structured support device 121 for superimposing surface information (described later) of a wafer representing a defect and detecting a defect that occurs constantly.
- FIG. 2 is a block diagram showing the configuration of the judgment view 21, and includes a CPU (Central Processing Unit) 42, a ROM (Read Only Memory) 44, a RAM (Random Access Memory) 45, A hard disk drive unit 48, a display processing unit 46, and interfaces 43, 49 and 50 are connected.
- a CPU Central Processing Unit
- ROM Read Only Memory
- RAM Random Access Memory
- the CPU 42 operates according to a program stored in the ROM 44 or a program read from another storage medium, and obtains scattering point information (LPD map) of each silicon wafer supplied from the laser scattering detector 11 and the control computer 12. ) Is received via the interface 43 and stored in the hard disk of the hard disk drive 48.
- the CPU 42 writes a predetermined portion of the LPD map stored in the hard disk into the RAM 45 as necessary, and performs a process of extracting a scratch and a judgment of good or bad described later.
- the processing result is subjected to graphics processing in the display processing unit 46 and then visually displayed on a monitor 47 such as a CRT (Cathode Ray Tube) and, if necessary, an interface such as a USB terminal. It is supplied to pudding via 4 9 and printed.
- CRT Cathode Ray Tube
- Fig. 3 is a display example in which the LPD map 30 supplied from the laser scattering detector 11 to the determination combi- ter 21 is converted into screen information and displayed.
- a defect that can be defective according to the aggregation state (feature amount) is detected.
- a set area 32 of a series of scattering points which are linearly close to each other is detected as a flaw, and a scattering point having a higher density is detected.
- the irregular gathering area 33 is detected as ragged.
- the judgment computer 21 detects linear flaws and irregular shaped bumps from the uneven distribution of the scattering points 31 on the silicon wafer surface and the state of generation of the aggregates in accordance with the inspection processing procedure shown in FIG. 4, and as the detection results. Based on the uneven distribution of the obtained scattering points 31 and the state of occurrence (features) of the aggregate, it is further determined whether or not the scratches should be made defective. 21 first obtains the LPD map data from the laser scattering detector 11 and enters the inspection processing procedure from step A11.In step A12, the block analysis method and the viramid processing perform the processing from the LPD map. A linear gathering area 32 of scattering points 31 on the silicon wafer surface is detected and recognized as a flaw.
- step A12 When the process of detecting the scratches in step A12 is completed, the computer 21 for determination moves to the following step A13, where unevenness, which is an irregular set of scattering points from the LPD map, that is, the silicon wafer surface Detects squeaks.
- step A14 the types of the detected flaws and scratches should be classified based on the feature amounts, and the silicon wafer to be inspected at this time should be determined to be defective by using a criterion based on the classified result. It is determined whether or not there is. After the determination result is output to a printer or the like in step A15, the inspection processing procedure is completed in step A16.
- FIG. 5 is a schematic diagram for explaining the pyramid processing for detecting the uneven distribution of the scattering points 31 which may be defective from the LPD map 30 and the aggregation region, and the determination computer 21 uses the LPD map 30 written in the RAM 45.
- the determination computer 21 uses the LPD map 30 written in the RAM 45.
- For each resolution we use three levels of resolution (a: 200 X 200 [Dots] b: 400 X 400 [Dots] ⁇ C: 1000 X 1000 [Dots]) as shown in Fig. 5 (A).
- a linear aggregate area of scattering points is extracted by a section analysis process using a rotation projection method described later.
- the judgment computer 21 first analyzes the image of the LPD map 30 with low resolution (a: 200 ⁇ 200 [Dots]) as shown in FIG. Is extracted.
- the linear gathering area 34 of the scattering points that can be extracted with low resolution is kept at this resolution by the rotation projection method described later.
- the judgment computer 21 analyzes the image with slightly higher medium resolution (b: 400 X 400 [Dots]) as shown in Fig. 5 (C), and the scattered point 31 is unevenly distributed. And a linear set area are extracted. In this case, a linear gathering region of scattering points that can be extracted at this resolution is detected as a scratch by the rotation projection method described later with this resolution.
- the uneven distribution 33 of the scattering points is recognized, but the linear aggregate region is not recognized.
- a linear aggregated region 33A hidden in the uneven distribution 33 which is a high-density region of scattering points 31, is recognized.
- the determination combination 21 can detect the set area 33A for the first time at this resolution by the rotation projection method described later.
- FIG. 6 is a schematic diagram showing the principle of a method of detecting a linear aggregation region of scattering points that may become a linear defect, and a predetermined region of an LPD map 30 created based on the scattering points 31 on the silicon wafer surface. Cut out segment SEG 10 from AR 10 and rotate this segment SEG 10. Incidentally, as a method of rotating the segment SEG10, for the image data of the area AR10 extracted in the RAM 45 (FIG. 2), a method of changing the readout address of the image data according to the rotation angle and reading out the image data is used. .
- the projection result of each scattering point 31 on the vertical axis (Y-axis) of the segment SEG10 at that time is defined as a Y-axis projection curve YP, and each projection result on the horizontal axis (X-axis) of the segment SEG10 at that time is obtained.
- the projection result of the scattering point 31 is defined as an X-axis production curve XP.
- the X-axis projection curve XP and the Y-axis projection curve YP have larger values as the projection amount (the number of scattering points) of the scattering points on each axis (X-axis or Y-axis) increases.
- the angle between the longitudinal direction of the continuous gathering region 32 of the scattering points present therein and the X axis of the segment SEG 10 is substantially a right angle. In such a state, the value of the X-axis production curve XP partially increases.
- the X-axis projection curve XP and the Y-axis projection curve YP When a state showing a steep rising part is detected, it is understood that a continuous scattering point aggregation region 32 exists. This means that even if the scattered point aggregation area 32 is not continuous, it is detected, and the state in which the scattered points are arranged with regularity in at least a certain direction in the segment SEG 10 is considered. Can be detected.
- FIG. 6 shows a state in which the rotation angles are 0 °, 10 °, and 50 °, but the method of detecting the aggregation region 32 of the scattering points using the rotation projection method in the present embodiment is not shown.
- the direction of the rotation projection is not fixed, and the set of scattering points is monitored by monitoring the rising state of the X-axis projection curve XP and the Y-axis projection curve YP when continuously rotated.
- the region 32 can be detected regardless of the direction.
- the method of detecting the continuous linear aggregation region 32 of the scattering points based on the projection curve described above with reference to FIG. 6 shows the principle of the detection, but actually, as shown in FIG.
- the X-axis projection curve XP and the Y-axis projection curve YP arrange the histograms corresponding to the rotation angles, and determine the linear aggregation area 32 of the scattering points by searching for the peak PEAK. be able to.
- a method of detecting a straight line by a so-called two-dimensional Hough transform may be used.
- the determination computer 21 uses the rotational projection method described above with reference to FIGS. 6 and 7 for each of the resolutions described above with reference to FIG. 5 to convert the linear collection region of the scattering points that may be defective into a silicon wafer. Detect in all areas.
- the determination computer 21 recognizes the linear aggregate area of the scattered point whose position (segment SEG 10) is specified by the rotation projection method as a linear flaw by image processing based on its luminance and color.
- the image information and numerical information indicating the position, shape, and the like of the object recognized as a scratch are held as wafer surface information.
- the determination computer 21 executes the process of connecting the intermittently recognized linear flaws under certain conditions in the above-described step A12 (FIG. 4).
- the first block 32a and the second block 32b recognized as linear scratches are determined as a method for determining whether or not to see them as one scratch.
- the computer 21 connected the angles 01 and 02 of the two flaw blocks 32a and 32b with respect to the reference direction, and the midpoints M1 and M2 of the blocks 32a and 32b.
- the angle similarity Z is obtained by the following equation.
- the judgment combination 21 draws a common approximate straight line L2 of the two blocks 32a and 32b, and obtains an approximate straight line L2 of the two blocks 32a and 32b. If the distance L 3 in the direction of the arrow is smaller than a predetermined value, two It is determined that prok 32a and 32b should be connected.
- the point between the two nearest points of the blocks 32a and 32b is determined.
- the two adjacent proxies 32a and 32b to be connected can be reliably connected.
- FIG. 10 shows an LPD map 30 showing a detection state of the scattering point 31 on the surface of the silicon wafer, and shows a state in which the uneven regions 35a, 36a, and 37a of the scattering point 31 are present.
- the scattering points 31 of the LPD map 30 are represented as dots as shown in FIG.
- the determination combination 21 performs a conversion process into, for example, a 256-gradation bitmap to obtain bitmap data BM as shown in FIG. .
- the determination computer 21 performs a smoothing process using the spatial fill data on the bitmap data BM, thereby smoothing the bitmap data BM as shown in FIG. 11C. Get one.
- a smoothing curve S1 is represented as an image, as shown in FIG. 10 (B), only the unevenly distributed regions 35a, 36a, and 37a of the scattering point 31 are represented with a blurred surrounding. .
- the dots away from the other dots are displayed thinner.
- the determination computer 21 binarizes the smoothed curve S1 with a preset threshold value SH, thereby obtaining a binarized area data D35C. obtain.
- a binarized area data D 35 C unevenly distributed areas 35 c, 36 c, and 37 c whose luminance is clearly different from the surroundings are obtained as shown in FIG. 10 (C).
- the threshold SH is provided for the region where the scattering points 31 are unevenly distributed, and the threshold SH is selected even in a region where the scattering points are slightly denser than the surroundings. Thus, the unevenly distributed region can be reliably extracted.
- the detection state of the scattering points 31 on the silicon wafer surface (the overall density of the scattering points 31) is obtained.
- the uneven distribution region can be detected in accordance with the following. For example, when many scattering points 31 are detected as a whole, the setting level of the threshold SH is increased, so that the area where the detection density is high is regarded as an unevenly distributed area, and other areas where the scattering points 31 are present on average Detection can be performed separately from the area.
- the determination computer 21 recognizes the irregularly-shaped unevenly-distributed area detected in this way as ragged, and holds this as numerical information (wafer surface information) representing image information, position, shape, and the like. As described above, when the scratches on the silicon wafer surface are detected, the computer 21 for determination determines whether the detected scratches are defective or not, as shown in FIG. The determination is made in the illustrated processing step A14.
- the judgment view 21 determines whether or not the linear flaws extracted in step A12 of FIG. 4 are defective based on the length and the detection intensity.
- the length of the flaw means the length of the flaw recognized as one by the method described above with reference to FIGS. 8 and 9, and the detection strength of the flaw means the rotational projection described with reference to FIGS. 6 and 7. It means the peak value PEAK (corresponding to the density of scratches) of the projection curve XP, YP (histogram) in the shion method.
- the computer for determination 21 finds the circumscribed rectangle of the unevenness extracted in step A13 in FIG. 4, and determines the area, the length in the vertical direction, the length in the horizontal direction, and the length of the diagonal of the circumscribed rectangle. It is designed to judge whether or not it is defective based on the length, density and area-density judgment curve. That is, as shown in FIG. 12, for the unevenly-distributed (yogore) region 35 c extracted in the above-mentioned step A 13, the judgment view 21 finds the circumscribed rectangle 35 d and obtains the circumscribed rectangle 3 d. Measure the 5d vertical length H, horizontal length W and diagonal length D and area, and The density is calculated based on the integral value of each scattering point 31 in the unevenly distributed (yogore) region 35c.
- the computer for determination 21 determines whether the area-density determination formula represented by (density-asymptotic density)> coefficient H (area-asymptotic area) is satisfied. It is determined to be defective. This means that when the value of the density and / or the area is larger than the area-density determination curve S35 as shown in FIG. 13, it is determined to be defective. That is, focusing on the fact that the area and density are in inverse proportion to each other as a condition for determining that a person is lagging, and expressing this as a conditional expression is the above-described area-density determination expression. By using this conditional expression, it is now possible to judge a defect due to squeezing under the same condition, which was conventionally judged by humans subjectively.
- the judgment computer 21 classifies the types of flaws and scratches according to the characteristic amount of the set area of the scattering points and unevenly distributed areas, in addition to the basic method of determining a defect based on such scratches and smudges, and determines the classification result. Accordingly, the reference for the defect determination is set. That is, as shown in FIG. 14, the scratches formed on the surface of the silicon wafer include, for example, scratches in an arc-shaped regular array (hereinafter, referred to as first scratches) 39 generated in the rubbing process.
- the determination computer 21 determines the type of the flaw according to the set state (feature amount) of the scattering points, and determines the determination criteria in accordance with the type of the flaw. It is made to change. For example, for a second flaw in which the arrangement of the scattering points, which are the feature amounts, is relatively irregular, the determination criterion is higher than when the arrangement of the scattering points, which is the feature amount, is the first regular flaw. By shortening the length of the first flaw, even if the length is not defective with the first flaw, it is defective with the second flaw It has been made to be.
- the determination computer 21 determines the type of sand in accordance with the set state (feature amount) of the scattering points described above with reference to FIG.
- the determination criterion area-density determination curve S35 described above with reference to FIG.
- FIG. 15 (A) is a diagram showing a method of detecting a scratch and a smear by the computer 21 for judgment
- FIG. 15 (B) is a diagram showing criteria for judging a defective wafer.
- the length, density, area, and density are used as feature quantities for classifying the scratches, but the features of the scratch include its length, density, width, linearity, circularity, There are positions, etc., and the features of Yogore include its area, density / density, distribution, shape, position, etc., and the judgment computer 21 uses these features as necessary.
- the determination computer 21 determines a defect based on scratches on the surface of the silicon wafer, and the result is output at the printer or the like.
- the flaws and scratches are extracted as information of the aggregate of scattering points (LPD) 31 and uneven distribution.
- the types and degrees of these extracted scratches are classified according to their features. The type and degree of damage is often different for each cause, and depending on the cause, even a small damage can be considered to be defective. Therefore, the judgment computer 21 applies a different defect judgment criterion for each type and degree of the classified scratches (aggregate, uneven distribution) to determine a defect, and a wafer that is good as a non-defective product is judged as defective.
- the present invention is not limited to this. Defects may be determined based on the width (thickness) of linear scratches, and furthermore, the area, height, linearity, circularity, position, defect (flaw, The characteristic amount such as the number, density, and size distribution of the scattering points 31 that constitute the image may be used for the defect determination.
- the silicon wafer surface inspection apparatus can detect scratches and scratches having a length or size that should be regarded as defective, thereby improving inspection efficiency. It is possible to bring.
- the silicon wafer determination device can use criteria such as length and size to be determined as a defect according to the type, and can improve the accuracy of defect determination. .
- the surface inspection system 10 having the judgment view 21 has a function of identifying the process in which the scratch has occurred in addition to the detection of such scratches and scratches (generation of wafer surface information) and the determination process of the defective wafer. have.
- FIG. 16 in which the same reference numerals are given to the corresponding parts in FIG. 1 shows each extraction unit 13 (13A, 13A, 11B, 11B, 11C) having a laser scattering detector (wafer surface inspection apparatus) 11 13B and 13C) are block diagrams showing an example of a configuration in which wafers 100 are arranged before and after each step of the manufacturing process of the wafer 100 (for example, the first step of the surface polishing step and the second step of the cleaning step). is there.
- the LPD maps LPD1, LPD2, and LPD3 detected by the laser scattering detectors 11A1IB and 11C are respectively associated with the process information on the hard disk of the computer 21 for determination.
- each LPD map LPD1, LPD2, and LPD3 output for each wafer from each laser scattering detector 11A, 11B, and 11C has a wafer ID of the LPD map. , A slot number, etc., and the determination computer 21 specifies the information for identifying these wafers and, in addition, the laser scattering detector 11A, 1 IB, or 11C that is the output source of the LPD map.
- Information IDs of the laser scattering detectors 11A, 1IB, and 11C, etc. is stored together with the LPD map.
- the information for identifying the laser scattering detector which is the output source of the LPD map, stored in the judgment computer 21 is associated with the wafer ID slot, J, port number, etc. of the wafer corresponding to the information. It is stored in the judgment computer 21 in time series. Therefore, the judgment computer 21 confirms the process history of the wafer and the final process at the present time by the accumulated ID of the laser scattering detector of a certain wafer (the accumulated information is called process history information). can do.
- the process history information corresponding to the LPD map LPD1 output from the laser scattering detector 11A provided before the first process is in a state in which nothing has been accumulated, and the determination computer 21 From this, LPD map LPD 1 is the first It is possible to recognize that it is an LPD map of a certain wafer before one process, and it corresponds to the LPD map LPD 2 output from the laser scattering detector 1 1B provided before the second process
- the process history information to be stored is a state in which only the information indicating the first laser scattering detector 11A has been accumulated, and the judgment convenience store 21 indicates that the LPD map LPD 2 is at the end of the first process. In other words, it is possible to recognize that it shows an LPD map of a certain wafer before the second step.
- the wafer ID and slot number of the wafer processed in each process are used as information indicating the process.
- the determination information may be supplied to the judgment combination 21 via the network 15 as the process information D (PRO).
- the determination computer 21 can recognize which process has been completed for the wafer specified by the wafer ID based on the wafer ID supplied from each process, and recognize the process history of the wafer. it can.
- each LPD map supplied from each laser scattering detector 11 is stored in the determination convenience store 21 in association with the process history information of each wafer.
- the stored LPD map is used for detecting scratches by the processing steps described above with reference to FIG.
- the information of scratches and scratches (wafer surface information) detected in the processing procedure of Fig. 4 is judged as the image information shown in Fig. 14 and Fig. 10 (C) and its numerical information such as its position, size, and density. Generated in the computer 21 for use, and the determination computer 21 superimposes such surface information on wafers having the same process history. The superimposed result is supplied to the support device 121, and is used when specifying the process in which the scratch has occurred.
- FIG. 17 shows a procedure for specifying a defective process by the computer 21 for determination and the support device 121.
- the computer 21 for determination enters the processing procedure from step A21, in step A22, the computer shown in FIG. Scratched scratches and yogo The surface information of the wafer already generated in the detection process is superimposed on the wafer with the same process information.
- the determination computer 21 displays the superimposition result as an image on the monitor in step A 23, supplies this superimposition data to the support device 121, and in the support device 121, executes step A 24. Execute the defective process identification process.
- the support device 122 1 superimposes the superimposed data corresponding to each process history information on the superimposed data, and the superimposed data in which the final process differs by one process (for example, as shown in FIG. 19). Compare the superimposed data D n, D m).
- the process history is a superimposed data Dn (that is, the final process is the first process) in which the surface information D1, D2,... Process) and surface information of the first and second processes!
- the superimposed data Dm that is, the final process is the second process
- the assisting device 1221 compares these superimposed data, and if the frequently occurring scratches are not present in the superimposed data but are present in the other superimposed data, the support device 122 It can be determined that there is a cause of scratching.
- the support apparatus 122 stores the determination result and the superimposition result in a storage medium such as a hard disk, and outputs these to a monitor or a printer, and then ends the processing procedure in step A25.
- superimposition data of the same wafer is stored every time the process history is added.
- the stored superimposed data for the same wafer may be compared.
- FIG. 22 shows a laser scattering detection device, which is a surface inspection device of each wafer, on the side of the wafer supplier and the side of the consumer across the transfer process.
- 11A and 11B are provided, and the laser scattering detectors 11A and 11B receive the LPD map obtained as a result of the wafer surface inspection in the determination computer 21. . It is assumed that the judgment computer 21 and the support device 121 are owned by a wafer supplier or another service provider.
- the wafer supplier inspects the surface of the manufactured wafer 100 with the laser scattering detector 11A.
- the test result is generated as an LPD map and supplied to the judgment computer 21.
- the judgment panel 21 Based on the LPD map supplied from the wafer supplier, the judgment panel 21 detects the scratches and determines the defect by the inspection and judgment method described above with reference to FIGS. Then, of the wafers for which inspection has been completed, only wafers determined to be non-defective are transferred to the consumer side by a carrier, for example.
- the consumer of the wafer inspects the surface of the inspected wafer transported from the supplier by the laser scattering detector 11B provided on the consumer side. This inspection result is generated as an LPD map and supplied to the judgment computer 21.
- the judgment computer 21 superimposes the flaw information and scratch information generated based on the LPD map supplied from the supplier for a plurality of wafers, and is generated based on the LPD map supplied from the consumer. Scratch information and scratch information are superimposed on multiple wafers.
- the superimposed result is supplied to the support device 122. By comparing these superimposed data, if the result indicates that the frequently occurring scratches are not in the superimposed data on the supplier side but in the superimposed data on the consumer side, The device 122 can determine that there is a cause of scratching in the transport process.
- the superimposed data compared in the support device 122 may be either superimposed data of the same wafer or superimposed data of different wafers.
- the information on the defective product generation process determined by the support equipment 1 2 1 is supplied by the supplier (computer 21 for determination or control computer). Both the computer 12A) and the consumer (control computer 12B) can refer to the information via the network 115 (including the network 15). Based on this, it becomes easier to communicate about the process (transportation process, etc.), and it becomes easier for consumers to communicate their own requirements to suppliers. This allows the wafer supplier to make an improvement plan that can supply wafers of a quality that accurately meets the demands of the customer.
- the LPD map supplied from the laser scattering detector 11 is After generating scratches and scratches based on the image information and information including various numerical values, the generated surface information is superimposed on a plurality of wafers. In this case, if there is a tendency for a large amount of scratches to occur at a certain position on the wafer surface, the overlapping amount of similar scratches at that position will increase as a result of the overlap.
- the process in which the scratches occur can be specified by the process history information associated with the surface information of each wafer, and the support device 122 generates the scratches based on the process history information. Identify the process. Therefore, the operator can easily find the defect generation process only by looking at the specific result. And the operation JP01 / 07699 In the evening, by inspecting and improving the defect generation process that has been found, the continuous generation of defective products can be quickly eliminated, and the work process can be improved.
- the support device 122 can detect the occurrence of a defect in the wafer transfer process from the wafer supplier to the consumer, it is easy to make an improvement plan for the transfer process.
- the information on the occurrence of the defect can be referred to by both the supplier and the consumer of the wafer, and the supplier and the consumer can refer to the information and communicate with each other to determine the defect. It is possible to identify the cause of the occurrence and plan improvement of the transport process.
- the scratches and scratches detected based on the LPD map in the determination computer 21 are generated as image information and various numerical information.
- the above description has been made on the case where the superimposed data is obtained by superimposing the obtained information (surface information).
- the present invention is not limited to this, and the LPD map supplied from the laser scattering detector 11 is used as the surface information of the wafer for the determination computer. You may superimpose by you 21 and the support apparatus 121. The processing procedure in this case is shown in FIG.
- FIG. 20 shows another embodiment of the processing procedure for specifying the defective process by the determination convenience 21 and the support device 121, and the determination computer 21 enters the processing procedure from step A31.
- step A32 the LPD map supplied from the laser scattering detector 11 as described above with reference to FIG. 3 is superimposed on a wafer having the same process information.
- LPDs generated at the same position are superimposed at the same position, and thus, a certain range (in FIG. 21, regions 24 0, 24 1, 23 0, If the occurrence frequency of LPD in 2 3 1) becomes high, this indicates that at this time, it is likely that scratches that cause the wafer to be defective in one of the process histories of each wafer on which the LPD map is superimposed will be constant. This means that the error has occurred.
- the method for detecting scratches and dust based on the superimposed LPD uses the method described above with reference to FIGS.
- the determination computer 21 displays the superimposition result and the detection result as an image on a monitor in step A33, and then supplies the superimposition data to the support device 121, and in the support device 121, executes step A34. Is performed.
- This defective process identification processing is the same as the processing step A 24 described above with reference to FIG.
- the computer 21 for determination and the support device 121 can specify the process that is the cause of the occurrence of scratches by directly superimposing the LDP map.
- the LPD map is directly superimposed in this way, in addition to defects caused by external factors such as scratches, small LPDs that are not regarded as scratches on individual wafers are constantly generated at the same position. Defects (regions 2442 shown in Fig. 21) can also be detected.
- the present invention is not limited to this, and various methods such as recording only the last process at the present time are used. Can be applied.
- the surface information of the wafer is superimposed in the judgment convenience menu 21, and the superimposed data resulting from the superimposition is supplied to the support device 122 to specify the defect generation step.
- the present invention is not limited to this, but supplies the scratch information and scratch information (wafer surface information) detected and generated in the judgment computer 21 to the support device 122, and Surface information may be superimposed in the device 122.
- the present invention is not limited to this, and a plurality of the determination computer 21 and the support device 1 are provided.
- the surface information and the superimposed data may be shared by 21 according to the respective information.
- the system for specifying the process has been described, the present invention is not limited to this.
- the quality required by the customer for the wafer of the customer is retained in the determination computer 21 or the support device 121, and the required quality is maintained. It is also possible to determine a wafer in which the quality is determined to be degraded rather than to determine the process in which a defect occurred in this wafer. In this case, the quality is determined based on the shape, density, and the like of the scratches in the determination processing described above with reference to FIG.
- the laser scattering detectors 11 A, 1 IB, and 11 C are provided between a plurality of processes, respectively, and the plurality of laser scattering detectors 11 A, 11 B, and 11 C are provided.
- the process in which the defect occurs is specified based on the LPD map obtained from C (that is, the plurality of LPD maps detected between the processes)
- the present invention is not limited to this.
- the failure occurrence step may be determined only by the LPD map obtained from the laser scattering detector 11C provided after the final step in the predetermined step unit.
- the computer 21 for judgment or the supporting device 121 stores in advance the tendency of the content of defects (scratch or scratch position, radius of curve flaw, etc.) occurring in each process, and The LPD map detected after is superimposed in the same manner as described above with reference to FIG. 17 or FIG. 19, and the information on the surface (wafer surface information) is detected based on the superimposed result. Then, of the wafer surface information detected in this manner, a process having such a failure occurrence tendency is specified based on the wafer information that matches the tendency of the failure content stored in advance. In this way, it is possible to specify the defect occurrence step without providing a laser scattering detector between each step.
- the information indicating the defect occurrence tendency for each process includes the items described above as the characteristic amount of scratches (the characteristic amounts of the scratches include its density, width, linearity, circularity, and position. , And the features of Yogore include its area, density / density, distribution, shape, position, etc.).
- the computer 21 for determination Has been described and the support device 121 determines the occurrence of a defect in the transport process between the supplier and the consumer based on the superimposed data.
- the control computer 12B detects a defective product based on the LPD map obtained from the laser scattering detector 11B, and determines a non-defective product or a defective product based on the information of the defective device.
- the control computer 12A or the determination computer 21 on the supplier side By transmitting the information on the determined wafer (wafer ID, slot number, information on the damage, etc.) to the control computer 12A or the determination computer 21 on the supplier side, the control computer 12A or the In the judging combination evening 21, the information of the wafer is compared with the information of the wafer or another wafer which is stored in advance. By the cause of failure is also possible to determine the transport process near Luke.
- the LPD map supplied from the laser scattering detectors 11A, 11B, and 11C is converted into scratch information and numerical information including image information and numerical information, and is superimposed on the determination computer 21.
- the present invention is not limited to this, and the LPD map supplied from the laser scattering detectors 11A, 11B, and 11C is not converted by the determination computer 21 into scratch information or dust information. You may make it superimpose directly.
- the process passed through the wafer is recorded as the process history information (FIG. 16) is described.
- the present invention is not limited to this, and only the last process at the present time is recorded, for example. Various methods can be applied.
- the laser scattering detectors 11A and 11B are provided before and after the transporting process, respectively, and the LPD maps obtained from the plurality of laser scattering detectors 11A and 11B (that is, the LPD maps detected before and after the transporting process) are provided.
- the present invention is not limited to this, and the defect is determined only by the LPD map obtained from the laser scattering detector 11B provided after the transport process. The occurrence may be determined.
- the support device i 21 stores in advance the trends of the contents of defects (positions of scratches, radius of curved flaws, etc.) that occur in the transport process, and an LPD map detected after the transport process. Are superimposed in the same manner as described above with reference to FIG. 17, and information on the scratches (wafer surface information) is detected based on the superimposition result. Then, among the wafer surface reports detected in this manner, those that match the tendency of the previously stored defect content are determined to be defective due to the transport process, and the fact is visually recognized by a modem or the like. indicate.
- the information indicating the tendency of occurrence of defects in the transport process includes the items described above as the characteristic amount of the scratch (the characteristic amount of the scratch includes its length, density, width, linearity, circularity, There is a position, etc., and as the feature amount of Yogore, its area, density / density, distribution, shape, position, etc.) can be used. It should be noted that, in this case as well, the process to be used for determining the occurrence of a defect is not limited to the transport process, and the same determination can be made for other various processes.
- the computer 21 for determination uses the surface information of the wafer representing the scratches. It is also possible to detect defects that are superimposed and occur constantly ⁇
- the silicon wafer surface information processing apparatus detects the constantly generated scratches by superimposing the wafer surface information. It is also possible to detect the generation process (for example, occurrence of a defect in the transport process). In addition, by sharing information on the process of occurrence of a defect (for example, the transport process) between both the supplier and the consumer of the wafer, the identification of the defect occurrence process and the improvement of the process can be performed by both the supplier and the consumer. It can be done easily. Industrial applicability
- the present invention can be applied to a processing step or a transfer step of wafer manufacturing.
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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US10/363,746 US7383156B2 (en) | 2000-09-05 | 2001-09-05 | Apparatus for inspecting wafer surface, method for inspecting wafer surface, apparatus for judging defective wafer, method for judging defective wafer, and apparatus for processing information on wafer surface |
EP01963440A EP1324022B1 (en) | 2000-09-05 | 2001-09-05 | Apparatus for inspecting wafer surface and method for inspecting wafer surface |
KR10-2003-7002429A KR20030034149A (ko) | 2000-09-05 | 2001-09-05 | 웨이퍼의 표면 검사장치, 웨이퍼의 표면 검사방법, 불량웨이퍼의 판정장치, 불량 웨이퍼의 판정방법 및 웨이퍼표면 정보처리장치 |
DE60141150T DE60141150D1 (de) | 2000-09-05 | 2001-09-05 | Vorrichtung zur untersuchung der wafer-oberfläche und verfahren zur untersuchung der wafer-oberfläche |
Applications Claiming Priority (8)
Application Number | Priority Date | Filing Date | Title |
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JP2000269163A JP4733820B2 (ja) | 2000-09-05 | 2000-09-05 | 不良ウエハの判定装置及び判定方法 |
JP2000269147A JP4733252B2 (ja) | 2000-09-05 | 2000-09-05 | ウエハの表面検査装置及び検査方法 |
JP2000-269163 | 2000-09-05 | ||
JP2000-269147 | 2000-09-05 | ||
JP2000-301146 | 2000-09-29 | ||
JP2000301148A JP4659961B2 (ja) | 2000-09-29 | 2000-09-29 | ウエハ表面情報処理装置 |
JP2000-301148 | 2000-09-29 | ||
JP2000301146A JP4623809B2 (ja) | 2000-09-29 | 2000-09-29 | ウエハ表面検査装置及びウエハ表面検査方法 |
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WO2002021111A1 true WO2002021111A1 (fr) | 2002-03-14 |
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PCT/JP2001/007699 WO2002021111A1 (fr) | 2000-09-05 | 2001-09-05 | Appareil d'inspection de la surface de plaquettes, procede d'inspection de la surface de plaquettes, appareil d'estimation de plaquettes defectueuses, procede d'estimation de plaquette defectueuse et appareil de traitement d'informations sur la surface de plaquettes |
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Country | Link |
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US (1) | US7383156B2 (ja) |
EP (1) | EP1324022B1 (ja) |
KR (2) | KR20080025124A (ja) |
DE (1) | DE60141150D1 (ja) |
TW (1) | TW513772B (ja) |
WO (1) | WO2002021111A1 (ja) |
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- 2001-09-05 KR KR1020087000266A patent/KR20080025124A/ko not_active Application Discontinuation
- 2001-09-05 EP EP01963440A patent/EP1324022B1/en not_active Expired - Lifetime
- 2001-09-05 DE DE60141150T patent/DE60141150D1/de not_active Expired - Lifetime
- 2001-09-05 US US10/363,746 patent/US7383156B2/en not_active Expired - Lifetime
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004061937A1 (en) * | 2002-12-18 | 2004-07-22 | Advanced Micro Devices, Inc. | Processing tester information by trellising in integrated circuit technology development |
CN111563870A (zh) * | 2019-02-14 | 2020-08-21 | 深圳中科飞测科技有限公司 | 图像处理方法和设备、检测方法和装置、存储介质 |
CN111563870B (zh) * | 2019-02-14 | 2023-10-27 | 深圳中科飞测科技股份有限公司 | 图像处理方法和设备、检测方法和装置、存储介质 |
Also Published As
Publication number | Publication date |
---|---|
KR20030034149A (ko) | 2003-05-01 |
US7383156B2 (en) | 2008-06-03 |
EP1324022A4 (en) | 2005-06-15 |
DE60141150D1 (de) | 2010-03-11 |
KR20080025124A (ko) | 2008-03-19 |
US20040036863A1 (en) | 2004-02-26 |
EP1324022B1 (en) | 2010-01-20 |
EP1324022A1 (en) | 2003-07-02 |
TW513772B (en) | 2002-12-11 |
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