WO2004099866A1 - 欠陥修正装置及びその欠陥修正方法 - Google Patents
欠陥修正装置及びその欠陥修正方法 Download PDFInfo
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- WO2004099866A1 WO2004099866A1 PCT/JP2004/006199 JP2004006199W WO2004099866A1 WO 2004099866 A1 WO2004099866 A1 WO 2004099866A1 JP 2004006199 W JP2004006199 W JP 2004006199W WO 2004099866 A1 WO2004099866 A1 WO 2004099866A1
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- defect
- correction
- irradiation
- priority
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136259—Repairing; Defects
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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
Definitions
- the present invention relates to a defect correcting apparatus and a defect correcting method for correcting a defective portion on a liquid crystal display substrate or a semiconductor substrate.
- defects are caused by the environment in the manufacturing equipment, such as particles, precipitation during thin film formation, or exposure defects. May occur.
- defect detection methods are disclosed in, for example, Japanese Patent Application Laid-Open No. Hei 4 3 1 6 3 4 6 or Japanese Patent Application Laid-Open No. 10 _ 2 5 3 3 3.
- a periodically arranged pattern is read as image data by an image sensor and compared with normal image data (circuit pattern).
- normal image data circuit pattern
- different parts are detected as defects.
- the defect detection method disclosed in Japanese Patent Laid-Open No. 10-25353 3 2 scans a periodically arranged pattern and reads it as a first image with an image sensor.
- a second image delayed by one cycle and a third image delayed by two cycles were obtained, and the first image and the second image were compared at the same time, and the second image and the third image Pattern defects are detected by comparison with the above image.
- defect detection / correction is carried out in which those defects are detected in the manufacturing process and repaired by irradiating the defective portion with laser light.
- the laser light irradiation is judged and the irradiation light quantity is determined in order to grasp the positional relationship with the circuit element and prevent damage to the circuit element and wiring. It is also desirable to adjust the irradiation area.
- the object of the present invention is to detect a defect on the substrate, set a priority for correction and an irradiation prohibited area according to the position on the circuit where the defect has occurred and the defect state, and set the defect according to this setting. This is to provide a defect correcting device and a defect correcting method for correcting the above.
- a defect correction apparatus for correcting a defect on a substrate by irradiating a laser beam, a defect detection unit for detecting the defect on the substrate, and irradiation of the laser beam.
- a defect correction apparatus for correcting a defect on a substrate by irradiating a laser beam, a defect detection unit for detecting the defect on the substrate, and irradiation of the laser beam.
- An irradiation prohibited area setting unit for setting the irradiation prohibited area on the substrate; and determining whether or not the defect detected by the defect detection unit relates to the irradiation prohibited area, and determined to be related to the irradiation prohibited area
- a correction area setting unit for setting a laser light irradiation area in a defect portion excluding the upper part of the irradiation prohibited area, the laser light irradiation area, and a defect not related to the irradiation prohibited area are corrected.
- a defect correction device comprising: a priority setting unit that
- a defect correcting device for correcting a defect on the substrate by irradiating a laser beam, the defect detecting step for detecting the defect on the substrate, and an irradiation prohibited region for prohibiting the laser beam irradiation.
- a correction area setting step for setting a laser beam irradiation area in a defect portion excluding above the irradiation prohibition area for the defect determined to be related to the irradiation prohibition area in the step; Defects that are not related to the prohibited area, a priority setting step that sets the priority of the correction order for and sets the number of correction points, and defect correction that corrects the defect by irradiating the laser beam according to the priority Craft
- a defect correction method comprising:
- FIG. 1 is a schematic block diagram showing a defect correcting apparatus according to the first embodiment of the present invention.
- Figure 2 is a schematic top view showing the substrate to be corrected.
- Figure 3 is a schematic diagram showing the priority areas.
- FIG. 4 is a schematic diagram showing the pattern on the substrate in FIG.
- Figure 5 is a schematic diagram showing the priority areas aligned with the defects on the pattern in Figure 4.
- FIG. 6 is a block diagram schematically showing a defect correction apparatus having a defect detection function according to the first embodiment.
- Figure 7 is a schematic diagram showing the substrate.
- FIG. 8 is a schematic diagram showing a pattern having no defect in the substrate in FIG.
- FIG. 9 is a schematic diagram showing a reference image in which a laser repair prohibition area is set.
- FIG. 10 is a schematic diagram showing a pattern including a defect.
- FIG. 11 is a block diagram schematically showing the defect correcting apparatus according to the second embodiment.
- FIG. 12 is a schematic diagram showing a reference image in which a plurality of laser repair prohibition areas are set.
- Fig. 13 is a schematic diagram showing a pattern with a defect and a processing area.
- Fig. 14 is a schematic diagram showing the pattern after correcting the defect in Fig. 13
- Figure 15 is a schematic diagram showing the pattern in which the processing area is set.
- FIG. 16 is a schematic diagram showing a pattern having defects.
- FIG. 1 is a block diagram showing a schematic configuration example of a defect correction apparatus for realizing this defect correction method.
- FIG. 2 is a diagram showing an example of a substrate for correcting defects.
- the picture elements (or pixels) described below are arranged on the substrate in a matrix shape.
- the periphery formed on the glass substrate of a liquid crystal display (LCD) is surrounded by wiring or the like.
- the defect to be repaired is a resist mask for the glass substrate (hereinafter simply referred to as the substrate) used in the liquid crystal display (LCD). Take the defect that occurs in the photolithographic process that exposes the turning as an example.
- this substrate is formed so that the scanning line 21 and the signal (data) line 2 2 are orthogonal to each other, and a TFT or the like is formed in a portion surrounded by these wirings.
- Circuit elements 2 3 are provided.
- Fig. 3 shows the structure of one picture element consisting of the surrounding scanning line 21 and data line (signal line) 2 2. This picture element is repeatedly arranged in a matrix. The pattern is repeated, so-called repeated pattern.
- the defect correction device 1 shown in Fig. 1 is roughly divided into a correction unit 2 and a control unit. It consists of control part 3 and correction area setting part 4.
- the correction unit 2 corrects the defect by outputting a laser beam for correcting the defect.
- the correction unit 2 can arbitrarily change the energy density (light intensity) of the laser beam, the irradiation region (area), and the irradiation surface shape according to the size of the defect.
- the control unit 3 is connected to the correction unit 2 and the correction area setting unit 4 and controls them.
- the correction area setting unit 4 includes an imaging unit 6, a memory 8, a defect detection unit 7, a feature extraction unit 9, and a priority setting unit 5.
- the imaging unit 6 may be a line type imaging unit in which imaging elements such as a CCD are arranged in a line, or an area type imaging unit in which the imaging elements are two-dimensionally arranged. Good.
- the imaging unit 6 is configured to be movable in the X and Y directions, and can image the entire substrate.
- the imaging unit 6 can also image the entire substrate by scanning the substrate in a uniaxial direction as long as it can capture the width dimension of the substrate.
- the imaging unit 6 is connected to the memory 8, and the captured image data is stored in the memory 8.
- the defect detection unit 7 uses the well-known defect detection method described in Japanese Patent Laid-Open No. Hei 4 3 1 6 3 4 6 and Japanese Patent Laid-Open No. 10-2 5 3 3 2 to obtain a substrate from image data. Get the top defect. Specifically, the defect detection unit 7 reads the image data picked up by the image pickup unit 6 from the memory 8 and compares it with a reference image (reference image) pattern that is stored in advance as a reference for quality determination. The area with the difference is identified as a defect, and the defect data is stored in memory 8. In addition, a defect may constitute not only one pixel but also one defect across a plurality of pixels. In such a case, the defect detection unit 7 labels the adjacent defective pixel group as one group.
- the labeled defect is stored in the memory 8 as defect data including position information of each pixel (defective pixel) and luminance value information obtained by imaging.
- the feature extraction unit 9 reads defect data from the memory 8 and extracts each defect feature. This defect feature depends on the size and shape of the defect, the luminance value obtained by imaging, and the position information of the defect, or a combination thereof.
- the priority setting unit 5 includes a defect determination unit 10 and a priority order setting unit 1 1.
- the defect discriminating unit 10 first performs initial setting. In other words, when making a determination, a determination criterion used for determination of availability is set in advance. The defect discriminating unit 10 discriminates whether or not the detected defect needs to be corrected by laser light irradiation based on this discrimination criterion.
- the criterion is at least one of the defect size, shape, position, and brightness value. This discrimination criterion can be arbitrarily set by the user.For example, the brightness value of a defect due to a particle described later, the size of a defect that does not need to be corrected, position information in a pattern, etc. Set as the discrimination level (threshold).
- This determination is based on the fact that the finished product becomes a defective product due to a malfunction if the defect is not corrected by the laser beam, or a subsequent process such as particle attachment, such as a cleaning process. so Determine whether it is a defect that can be removed or does not cause a problem if not corrected.
- examples of defects that cannot be corrected by laser light irradiation include a pattern shift, a missing pattern, or a large number of defect correction points. If there are a large number of corrections, it is desirable to correct all defects.However, if the correction is not completed within the time set by the user in consideration of the time required for correction, the correction is deemed impossible.
- it is subject to rework processing. For these defects, return to the previous process and perform a leak treatment. This rework process is flawed. This includes processing the turn itself as a defective part, and performing resist coating and patterning again.
- the priority of the correction order that is, the priority is set by collating with this priority area. Note that the user can set the number of correction points, and limit the number of corrections in consideration of the time required for correction, or limit the number of corrections according to priority.
- the defect determination unit 10 excludes defects such as particles that do not need to be corrected from the defects to be corrected, and sets only defect data that needs correction as the defect data to be corrected. Store in memory 8. If the determined defect is subject to rework processing, the determination processing is terminated at that point, and the substrate is returned to the previous step.
- the defect data to be corrected may be sent directly to the priority order setting unit 11 without being stored in the memory 8.
- the defect determination unit 10 can set the number of correction points by the user and control the number of corrections in consideration of the time required for correction. It can also be limited.
- the priority order setting unit 11 performs weighting (priority setting) for defects so as to correct important defects.
- the priority setting unit 11 acquires the defect data to be corrected from the memory 8 after the discrimination process is completed, and sets the priority in the order of correction by laser light irradiation for each defect to be corrected.
- the priority order setting unit 1 1 acquires image data of one pattern (pattern image) from the image data in the memory 8, and circuit elements and wirings arranged in the pattern image. Set the priority area to be modified according to the priority. Of course, this priority area may be preset by the user. At least one priority area is set. When multiple priority areas are set, the priority order is determined for each priority area.
- the priority is set against this priority area.
- the user can limit the number of corrections according to the priority.
- the number of corrections is limited by the defect determination unit 1 and the priority order setting unit 1 1, which determines defects up to the order in which corrections are completed within a predetermined time when corrections are made in order of priority. May be.
- the criterion is that it operates normally and realizes stable operation over a long period of time (product life in design).
- the priority order for example, in the case of a liquid crystal display, it is best to correct a defect that causes a failure in the formation of the drive circuit element 23 such as a pixel transistor or a defect that makes the drive impossible. is important.
- other circuits and layouts It is important to correct electrical short-circuit defects from electrical paths such as wires and electrodes. Subsequently, the defect in which the wiring is disconnected, the defect on the light emitting portion, and the like are in this order. In addition, when a defect covers two priority areas, it is determined based on the higher priority area. C Next, defects on the substrate in the defect correction device 1 configured in this way are identified. The operation to be acquired will be described in the order of steps.
- the defect correction apparatus 1 stores in the memory 8 image data of the imaging unit 6 or the substrate imaged by scanning and moving.
- the defect detection unit 7 detects a defect portion by comparing the image data with a reference image (reference image) provided in advance, generates defect data to be corrected, and stores it in the memory 8. .
- the feature extraction unit 9 reads defect data from the memory 8 and extracts the defect size, shape, overall luminance, and defect position as defect features from each defect data.
- the feature extraction unit 9 associates the extracted defect feature with the defect data and stores it in the memory 8.
- the defect determination unit 10 determines whether or not each defect needs to be corrected. Specifically, the defect determination unit 10 reads the defect feature in each defect data from the memory 8, and performs laser beam irradiation as described above based on the determination criterion for this defect. Determine whether corrections need to be made.
- the defect image data related to the defect data that needs to be corrected is stored in the memory 8 as the defect data to be corrected.
- a priority area for correction is set for the defect data to be corrected.
- the first priority area A 1 is the circuit element 2 3 and the area including a part of the wirings 2 1 and 2 2
- the second priority area A 2 is the first priority area A 1.
- the area of wiring 2 1 and 2 2 and the third priority area A 3 are the three priority areas of the light-emitting area surrounded by wiring 2 1 and 2 2.
- the priority for the defect data to be corrected is set.
- This priority is assigned to one of the first, second, and third priority areas A1, A2, and A3 as described above, and the priority (priority order) is set.
- the defect target defect data 2 4 a corresponds to the first priority area A 1
- the correction target defect data 2 4 b corresponds to the second priority area A 2
- the correction target defect data 2 4 a corresponds to the third priority area A 3. Therefore, the priority order is set to 2 4 a in the first order, 2 4 b in the second order, and 2 4 c in the third order.
- the set priority is Stored in memory 8 corresponding to the correct defect data.
- the control unit 3 reads the defect data to be corrected from the memory 8 in order of priority.
- the control unit 3 irradiates the defect on the corresponding substrate with laser light from the correction unit 2 and corrects the defect data to be corrected up to the set priority order.
- Priorities can be set in any order from the highest priority. Also, the priority order can be arbitrarily set according to the type and pattern of defects.
- the correction unit 2 identifies the position, size, and shape of the defect on the substrate based on the characteristics in the defect data to be corrected, and the control unit 3 controls the light intensity (energy density). And the laser beam whose irradiation range is controlled is irradiated to the defect, and the correction is completed. This irradiation range is adjusted by moving a light shielding plate or the like as will be described later.
- defect correction method of this embodiment includes the following effects.
- the presence or absence of correction is determined. For example, defects that do not need to be corrected, such as those that can be removed by cleaning, can be excluded from the correction target to improve the efficiency of the correction.
- the priority area is set for all areas in the pattern image. It is possible to set the priority area for only a part of the pattern. In this case, it is important to set a high correction priority for defects in the priority area and a low correction priority for defects in the non-priority area. It is possible to correct such defects with priority.
- the priority is set for each defect data.
- the present invention is not limited to this, and it is possible to use image data for each pattern. Specifically, the image data for each pattern is superimposed on the image obtained by capturing the template, and the priority order is set for all defects in the pattern obtained from the difference at once. You can
- the defect correction method detects defects from captured image data, generates defect data, and further determines whether correction is possible or not. If the defect cannot be corrected as a result of the judgment, the rework process is performed. If the defect can be corrected, the correction priority is set based on the predetermined priority area. According to this embodiment as described above, it is possible to reliably detect an important defect and reduce the time required for an operator while shortening the correction time by correcting based on the priority. Is realized.
- FIG. 6 is a block diagram showing a schematic configuration of the defect correction apparatus according to the second embodiment.
- Figure 7 shows a matrix of pixels formed as a substrate to be corrected.
- FIG. 2 is a diagram showing, as an example, a glass substrate used for a liquid crystal display to be used.
- FIG. 8 is an enlarged view of one picture element in FIG. 7, and is a diagram showing a configuration in which the circuit element 23 is formed in a region surrounded by the wiring by the data lines and the scanning lines.
- 9 and 10 are diagrams showing the laser repair prohibited area (dotted line) in the area and wiring shown in FIG. In FIG. 8, parts having the same functions as those in FIG. 4 are given the same reference numerals.
- the defect correcting device 30 is roughly composed of a correcting unit 3 1, an information generating unit 3 2, an XY table 3 3, and a control unit 3 4. First, the correction unit 3 1 will be described.
- the correction unit 3 1 includes a known laser element 3 5 that outputs a laser beam for correcting a defect, a laser control unit 3 6 that drives and controls the laser element 3 5, and an irradiation area (range) of the laser beam And an irradiation area adjustment unit 3 7 that arbitrarily changes the shape of the irradiation surface.
- the type and wavelength of the laser beam are not particularly limited as long as the defect can be corrected.
- Irradiation area adjustment unit 3 7 for example, the irradiation area adjustment unit 3 7 c
- a slit-shaped opening is created to allow the laser beam to pass through. It is possible to change the size and shape of the laser light irradiation area.
- other known structures may be used as long as other slit-like openings can be formed.
- This information generator 3 2 includes an imaging unit 6 and a basic information setting unit 3 8.
- the imaging unit 6 includes a semiconductor imaging device (not shown) such as a CCD, an optical system and an image processing circuit whose magnification can be changed under the control of a drive control unit 43, which will be described later, and images a correction target substrate. To do.
- This imaging unit 6 captures the images before and after the correction process at a desired magnification. The captured image is sent to the basic information setting unit 3 8 as image data.
- the basic information setting unit 3 8 holds the image data picked up by the image pickup unit 6 and uses a reference pattern (reference image) that is identical to the circuit pattern formed on the correction target substrate and has no defect. ) Is held as.
- This reference image is a comparison target when detecting a defect.
- a reference image having a composition of a repeating pattern of a minimum unit of one picture element shown in FIG.
- a plurality of reference images may be prepared so as to cover all circuit patterns formed on the substrate, and not necessarily one type.
- the reference image is stored with the positional information on the board, and can be used as a template.
- this reference image may be created exclusively, or by using the image data from the imaging unit 6 and using a pattern portion having no defect on the processing target substrate as a reference image. May be.
- the basic information setting unit 3 8 has a prohibited area setting unit 39 for setting a laser repair prohibited area KA for prohibiting laser light irradiation as shown in FIG. 9 in advance.
- the element formation region for forming the wiring composed of the scanning line 21 and the data line 2 2 and the circuit element 2 3 as shown in the second reference image points shown in FIG. 9). (Line range) is set as the laser repair prohibited area KA.
- the difference between the brightness values generated in the wiring and circuit elements and the other parts is used to show the laser beam indicated by the dotted line in FIG. It is also possible to set the pair prohibited area KA automatically.
- the laser repair prohibition area KA is set for the wiring and the circuit element by using binarization based on the gradation difference and morphology.
- the laser repair prohibited area KA may be set by a user operation while viewing the extraction result, or the user may correct the drawing using a commonly used drawing tool.
- the XY table 33 is mounted with a drive mechanism (not shown) in the two-dimensional directions of X and Y that are orthogonal to the optical axis of the imaging lens of the imaging unit 6 and the optical axis of the correction unit 31, on which the substrate to be corrected is placed. It can be moved and scanned more.
- the mounting surface of the XY table 33 has a large number of holes, and has a function of holding the substrate to be corrected by suction by sucking air, or a substrate float by blowing air.
- the imaging unit 6 and the correction unit 31 may be configured to be movable and scanable in the two-dimensional direction or one of X and Y.
- the control unit 34 includes an information storage unit 40, a defect detection unit 41, and a correction (repair prohibited) area. It consists of a setting unit 4 2 and a drive control unit 4 3.
- the information storage unit 40 includes a reference information storage unit 40a and a correction target information storage unit 40b.
- the reference information storage unit 40a acquires a reference image from the basic information setting unit 38 and stores it as reference information necessary for performing defect correction processing.
- the correction target information storage unit 40 b has a configuration as shown in FIG.
- the defect detection unit 41 detects the defect by comparing the reference surface image with the image after the patterning process. Further, the defect detection unit 41 sends the defect information relating to the position and size of the detected defect to the correction (repair prohibited) area setting unit 42.
- This correction (prohibition of repair)
- the area setting unit 4 2 includes each defect based on the defect information from the defect detection unit 41 in the laser repair prohibited area set by the prohibited area setting unit 39. It is determined whether or not. This determination result is sent to the drive control unit 43 as a determination result including defect determination information included in the laser repair prohibited area and defect not included, and the size and position of each defect. Based on the determination result, the drive control unit 4 3 controls the correction unit 2 and the XY table 33 to correct a defect in the substrate to be processed.
- the defect repair device 1 is activated and each component is initialized. Place the target substrate on the XY table 3 3. This As shown in FIG. 7, for example, a resist mask is patterned on the substrate to be processed, and it is surrounded by wiring composed of scanning lines 21 and data lines 2 2 provided vertically and horizontally. A plurality of pixels (called patterns) composed of picture elements provided with circuit elements 23 are arranged in a matrix.
- the basic information setting unit 3 8 of the information generating unit 3 2 acquires a reference image (an image having a plurality of patterns and a composition of one pattern) used for defect detection.
- the reference image may be obtained by imaging a standard substrate created exclusively, or may be used by imaging a pattern having no defect in the correction target substrate. If a reference image is prepared as image data in advance, the image data is input before initialization at the start is completed. Further, when the reference image is created from the correction target substrate, if there is a defect, a defect-free reference image may be created by removing the defect by known image processing.
- a plurality of reference images may be prepared in order to support a plurality of patterns formed on the correction target substrate.
- the reference image may be a 2 56 gradation image data or a color image as long as it can be compared with the image of the correction target substrate imaged by the imaging unit 6. If the pattern is simple, it can be performed even with low gradation image data such as 16 gradations, and the image format is not particularly limited.
- the laser repair prohibition area KA can be automatically set from the brightness difference using the brightness value information as in the defect extraction in the first embodiment described above. Alternatively, it can be set manually with a drawing tool. This laser repair prohibited area KA is held in the prohibited area setting section as prohibited area information. In addition, a separate storage unit may be provided in the information storage unit 40 and held.
- this defect detection is performed by reading a reference image from the reference information storage unit 40a, reading from the correction target information storage unit 40b, a captured image that is a patterning processed image, and reading these images. In comparison, a portion having a different luminance difference is detected as a defect, and further, positional information on the position of the defect on the substrate to be processed and the size of the detected defect are detected. After that, the defect size and its position information are corrected (repair prohibited) and sent to the area setting unit 42.
- the defect detection unit 41 automatically extracts using the luminance difference
- the extracted result is superimposed on the captured image of the correction target board so that the user can visually observe the extraction result. It may be displayed on the monitor along with the position information.
- the area setting unit 4 2 reads the laser repair prohibited area KA as shown in Fig. 9 set from the prohibited area setting unit 39 and reads the defect position information from the defect detection unit 4 1. And overlay these pieces of information. As a result of this superposition, as shown in FIG. 10, it can be seen that a defect 25 a exists on the scanning line 21 that is the laser repair prohibited area KA. It can also be seen that the defect 25 b exists on the pixel area not related to the circuit element 23. Accordingly, the correction (repair prohibited) area setting unit 4 2 generates correction information instructing that the defect 25 a is not corrected and the defect 25 b is corrected, and is sent to the drive control unit 4 3. To do. This correction information consists only of the size information and the position information of the defect to be corrected. Defects that are prohibited from being corrected are not subject to correction.
- the drive control unit 4 3 moves the XY table 3 3 and the correction unit 3 1 based on the defect position information in the correction information from the correction (repair prohibited) area setting unit 4 2, so that the defect 2 5 b Move so that the laser beam of correction unit 2 is aimed at the center.
- the drive control unit 4 3 sends correction information to the laser control unit 3 6.
- the laser control unit 36 sets the irradiation area (irradiation range) 26 as shown in Fig. 10 based on the size information of the defect 25 b in the correction information, and the laser light Set the strength. Then, the laser beam is irradiated to remove the defect 25 b.
- Such a correction has multiple defects that are not included in the laser repair prohibited area KA. If it exists, it is desirable that the movement distance of the XY table 33 and the correction unit 31 is short and the defect correction is completed in as short a time as possible.
- Defects should be repaired with a light intensity that does not damage the substrate to be repaired and a large amount of defect change (removed) with a single exposure.
- the defect may be corrected in multiple steps.
- the defect is large and there is a risk that the light intensity of the laser light for removing this may damage other adjacent parts, the light intensity is reduced and the laser light is irradiated multiple times. Also good. However, it is necessary to optimize multiple irradiation times because the processing time becomes longer.
- the defect correction apparatus extracts defects that damage normal parts (for example, wiring and circuit elements) when the detected defects are corrected. For other defects, it is possible to prevent damage to normal parts by making corrections.
- defects that are prohibited to be corrected by laser light irradiation are applied to areas other than the laser repair prohibited area. No correction was made to the defective part.
- the defect that does not enter the laser repair prohibition area is deleted and corrected, and the priority of the correction order is set for the defect to be corrected.
- FIG. 11 is a block diagram showing a schematic configuration of a defect correcting apparatus according to the third embodiment.
- Fig. 12 is a diagram showing the laser repair prohibition area (dashed line) on the board to be corrected.
- Fig. 13 is a diagram showing defects on the wiring and circuit elements.
- Fig. 14 is It is a figure which shows the state which performed the correction which removes a defect.
- the same parts as those shown in FIGS. 6 to 10 in the second embodiment described above are denoted by the same reference numerals.
- the basic information setting unit 3 8 includes a repair area setting unit 5 3 and a control unit 5.
- 4 has a correction area setting section 4 4 and a priority setting section 5.
- the priority setting unit 5 is the same as that in the first implementation system described above, and a detailed description thereof is omitted here.
- the prohibited area setting unit 39 is provided with a laser repair prohibited area for each portion where the electrically separated scanning lines 21, data lines 22, and circuit elements 2 3 are arranged by dotted lines shown in FIG. Set KA 1 to KA 5.
- the prohibited area setting unit 39 sets identification marks in the set laser repair prohibited areas KA 1 to KA 5 so that they can be identified. In other words, when a defect straddles multiple laser repair prohibited areas KA, the prohibited areas are short-circuited. It can be estimated that the priority of correction is high. For example, as shown in FIG. 13, when there is a defect 2 7 extending across the scanning line 2 1 and the circuit element 2 3, the laser repair prohibited area KA 3, KA 4 from the prohibited area setting unit 3 9 As a result, it is determined that the defect is short-circuited.
- the correction area setting unit 4 4 includes the size and position information of the defect input from the defect detection unit 41, the laser repair prohibited areas KA 1 to KA 5 by the prohibited area setting unit 39, and the repair area setting. Based on the laser irradiation area information by the unit 53, the laser irradiation area AA is set for the defect 2 7 as shown in FIG.
- defect correction for removing a defective portion that does not enter the laser repair prohibited area in the present embodiment will be described.
- the correction area setting process is performed after the reference information input process is completed, as in the second embodiment.
- the prohibited area setting unit 39 sets a plurality of laser repair prohibited areas K A 1 to K A 5 as described above in the pattern based on the reference image, and holds them as prohibited area information. At this time, the repair area setting unit 53 also holds the laser irradiation area in the reference image pattern as repair area information.
- a priority area for correction is set based on the pattern based on the reference image from the reference information storage unit 40a. This setting is Performed at the same time as the zone setting process or at the timing before and after. The setting of the priority area is the same as that of the first embodiment described above.
- This defect detection is performed by reading the first reference image from the reference information storage unit 40a, reading it from the correction target information storage unit 40b with the first captured image that is the image after patterning, and comparing these images. Thus, a portion having a different luminance difference is detected as a defect, and position information on the substrate on which the defect is located is detected. Using this position information, the defect detection unit 41 reads and compares the second reference image and the second photographed image, and detects the size of the detected defect. After that, the defect size and its position information are sent to the correction area setting unit 44.
- the size and position information of the defect 2 7 input from the defect detection unit 4 1 are input to the correction area setting unit 4 4. Furthermore, the forbidden area information is read from the forbidden area setting unit 39, and defect 2 7 is detected as shown in Fig. 13 by overlaying the defect position and laser repair forbidden areas KA1 to KA5. It can be seen that it exists across the laser repair prohibition areas KA 3 and KA 4. In other words, since the defect 27 acts to short-circuit the scanning line 21 and the circuit element 23, it is determined as a defect having a high priority.
- the repair area information is read from the repair area setting section 53, and the laser irradiation area AA is set in a portion that can be corrected by the defect 27.
- This laser irradiation area AA and defects 27 The clearance and position information is sent to the drive controller 4 3 as correction information.
- Priority of the order of correction for all defects to be corrected next that is, defects not related to the laser repair prohibited area and defects having the correction area (laser irradiation area AA) set in the previous process
- Set the degree (priority) This priority setting is equivalent to the setting procedure described in the first embodiment.
- the drive control unit 4 3 moves the XY table 3 3 and the correction unit 3 1, and in accordance with the priority, the correction unit 3 is placed at the center of the defect or the correction area. Move so that 1 laser beam is aimed.
- the laser beam of the correction unit 2 is moved so as to be aimed at the laser irradiation area A A.
- the drive control unit 4 3 sends correction information to the laser control unit 3 6.
- the laser control unit 36 sets the light intensity of the laser beam based on the size information of the defect 27 (laser irradiation area A A) in the correction information.
- the defect 27 portion applied to the laser irradiation area A A is removed by laser irradiation.
- other defects are also moved according to the priority, aiming at the laser beam of the correction unit 2, and irradiating with the laser beam with the calculated light intensity to be sequentially removed.
- multiple laser repair prohibited areas KA Defects that straddle may be affected by electrical short-circuiting, so it is possible to remove defects that exist in the pixel area excluding the laser repair prohibited area KA. In other words, it is possible to prevent an electrical short circuit between the scanning line, the data line and the circuit element.
- the defect correction apparatus of this embodiment has the same configuration as the defect correction apparatus of the third embodiment described above, but the repair area setting unit 53 is different.
- the repair area setting unit 53 sets the scan line 21, the data line 22, and the circuit element 23 to the laser repair prohibition areas KA 1 to KA 5.
- a laser irradiation area AA is set around the circuit element 2 3 in the picture element area.
- the distance between the wiring composed of the scanning line 2 1 and the data line 2 2 and the circuit element 2 3 is narrow, and in particular, a part of the data line 2 2 and the circuit element 2 3. Is narrower.
- the defect 2 8 has occurred in the circuit element 2 3, but the end of the defect 2 8 is close to the data line 2 2, so there is a risk of an electrical short circuit. .
- the defect correcting apparatus of the present embodiment can reliably correct a defect that is electrically short-circuited in close proximity without straddling the constituent parts.
- the laser irradiation area AA is provided over the entire periphery of the circuit element 23, but it can be set only in a part.
- the laser irradiation area AA can be automatically set around the circuit element 23 by image processing, or can be set manually by a drawing tool or the like. .
- the laser irradiation area A A is set around the circuit element 2 3
- the pattern may be set in an area where adjacent wirings and / or circuit elements are close to each other in the pattern.
- the substrate is a glass substrate used for a liquid crystal display as an example
- the pattern is a drive circuit element such as a transistor
- a single pixel which is a resister for forming wiring and electrodes, is arranged in a matrix and is referred to as a pattern.
- the present invention is not limited to this, and may be a silicon substrate used for a semiconductor device.
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- Crystallography & Structural Chemistry (AREA)
- Chemical & Material Sciences (AREA)
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- Power Engineering (AREA)
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- Manufacturing Of Printed Wiring (AREA)
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- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
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Abstract
Description
Claims
Priority Applications (2)
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JP2005506003A JP4646805B2 (ja) | 2003-05-09 | 2004-04-28 | 欠陥修正装置及びその欠陥修正方法 |
KR1020107026437A KR101061653B1 (ko) | 2003-05-09 | 2004-04-28 | 결함수정장치 및 결함수정방법 |
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JP2003-132298 | 2003-05-09 | ||
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JP2003-144095 | 2003-05-21 |
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PCT/JP2004/006199 WO2004099866A1 (ja) | 2003-05-09 | 2004-04-28 | 欠陥修正装置及びその欠陥修正方法 |
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JP (2) | JP4646805B2 (ja) |
KR (2) | KR101061653B1 (ja) |
TW (1) | TWI325495B (ja) |
WO (1) | WO2004099866A1 (ja) |
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JP2006237575A (ja) * | 2005-01-05 | 2006-09-07 | Taiwan Semiconductor Manufacturing Co Ltd | 直接書き入れ方式のウェーハ修復方法 |
JP2006337842A (ja) * | 2005-06-03 | 2006-12-14 | Toshiba Corp | 液晶パネルのリペア方法及びリペア装置 |
JP2010064120A (ja) * | 2008-09-12 | 2010-03-25 | Olympus Corp | レーザリペア装置およびレーザリペア方法 |
JP2010075979A (ja) * | 2008-09-26 | 2010-04-08 | Komatsu Ntc Ltd | レーザ加工機 |
JP2011101903A (ja) * | 2011-02-07 | 2011-05-26 | Olympus Corp | レーザリペア装置 |
JP2011194432A (ja) * | 2010-03-18 | 2011-10-06 | Olympus Corp | レーザ加工方法、及び、レーザ加工装置 |
JP2011203710A (ja) * | 2010-03-05 | 2011-10-13 | Olympus Corp | 欠陥修正装置、欠陥追跡方法および欠陥追跡プログラム |
US9583033B2 (en) | 2011-11-25 | 2017-02-28 | Lg Display Co., Ltd. | Display panel for display device and method for detecting defects of signal lines for display devices |
CN110987957A (zh) * | 2019-11-04 | 2020-04-10 | 江苏大学 | 基于机器视觉和激光加工的智能化去缺陷方法 |
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KR101469481B1 (ko) * | 2011-11-25 | 2014-12-05 | 엘지디스플레이 주식회사 | 표시장치용 표시패널 및 표시장치용 신호라인의 불량 검출방법 |
US9916653B2 (en) * | 2012-06-27 | 2018-03-13 | Kla-Tenor Corporation | Detection of defects embedded in noise for inspection in semiconductor manufacturing |
JP6139292B2 (ja) * | 2012-11-06 | 2017-05-31 | 株式会社東芝 | 欠陥補修装置及び欠陥補修方法 |
US10190991B2 (en) * | 2016-11-03 | 2019-01-29 | Applied Materials Israel Ltd. | Method for adaptive sampling in examining an object and system thereof |
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- 2004-04-28 KR KR1020107026437A patent/KR101061653B1/ko not_active IP Right Cessation
- 2004-04-28 KR KR1020047021364A patent/KR101027832B1/ko not_active IP Right Cessation
- 2004-04-28 TW TW093111858A patent/TWI325495B/zh not_active IP Right Cessation
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JP2011203710A (ja) * | 2010-03-05 | 2011-10-13 | Olympus Corp | 欠陥修正装置、欠陥追跡方法および欠陥追跡プログラム |
JP2011194432A (ja) * | 2010-03-18 | 2011-10-06 | Olympus Corp | レーザ加工方法、及び、レーザ加工装置 |
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US9583033B2 (en) | 2011-11-25 | 2017-02-28 | Lg Display Co., Ltd. | Display panel for display device and method for detecting defects of signal lines for display devices |
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Also Published As
Publication number | Publication date |
---|---|
TW200506347A (en) | 2005-02-16 |
KR101027832B1 (ko) | 2011-04-07 |
KR20100130237A (ko) | 2010-12-10 |
TWI325495B (en) | 2010-06-01 |
JPWO2004099866A1 (ja) | 2006-07-13 |
KR20060020578A (ko) | 2006-03-06 |
JP2011025316A (ja) | 2011-02-10 |
KR101061653B1 (ko) | 2011-09-01 |
JP4646805B2 (ja) | 2011-03-09 |
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