WO2006046428A1 - マーク位置検出装置及び設計方法及び評価方法 - Google Patents
マーク位置検出装置及び設計方法及び評価方法 Download PDFInfo
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- WO2006046428A1 WO2006046428A1 PCT/JP2005/019049 JP2005019049W WO2006046428A1 WO 2006046428 A1 WO2006046428 A1 WO 2006046428A1 JP 2005019049 W JP2005019049 W JP 2005019049W WO 2006046428 A1 WO2006046428 A1 WO 2006046428A1
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F9/00—Registration or positioning of originals, masks, frames, photographic sheets or textured or patterned surfaces, e.g. automatically
- G03F9/70—Registration or positioning of originals, masks, frames, photographic sheets or textured or patterned surfaces, e.g. automatically for microlithography
- G03F9/7092—Signal processing
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70483—Information management; Active and passive control; Testing; Wafer monitoring, e.g. pattern monitoring
- G03F7/70605—Workpiece metrology
- G03F7/70616—Monitoring the printed patterns
- G03F7/70633—Overlay, i.e. relative alignment between patterns printed by separate exposures in different layers, or in the same layer in multiple exposures or stitching
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F9/00—Registration or positioning of originals, masks, frames, photographic sheets or textured or patterned surfaces, e.g. automatically
- G03F9/70—Registration or positioning of originals, masks, frames, photographic sheets or textured or patterned surfaces, e.g. automatically for microlithography
- G03F9/7088—Alignment mark detection, e.g. TTR, TTL, off-axis detection, array detector, video detection
Definitions
- the present invention relates to a mark position detection apparatus, a design method, and an evaluation method such as an overlay measurement apparatus for measuring an overlay mark alignment mark on a test substrate such as a semiconductor wafer.
- Patent Document 1 Japanese Patent Laid-Open No. 2002-25879
- the above-described conventional method is a method for determining an optimum visual field position of the overlay measurement apparatus.
- the mark position detection device of the present invention is formed by an imaging optical system that forms an image of reflected light of a mirror formed by a plurality of stepped parts formed on a substrate, and the imaging optical system.
- An imaging unit that captures an image; and a detection unit that detects a position of the step based on an output signal from the imaging unit, wherein the imaging optical system determines a wavefront aberration of the imaging optical system as Zernike When represented by a polynomial, the variation force due to the object height of Z4 in the polynomial is a predetermined range due to the position detection accuracy of the mark position detection device.
- the optical system of the imaging means satisfies the following conditional expression.
- N.A . Imaging on the object side of the imaging means N.A.
- ⁇ ⁇ Wavefront aberration at the optical axis center and object height 30 ⁇ m Zernike coefficient ⁇ 4 difference (m) where Z4 is a coefficient applied to the function (2 p 2 — 1)
- TIS design Design specifications for overlay misalignment when measuring mark with zero overlay misalignment
- the optical system of the imaging means satisfies the following conditional expression.
- N.A . Imaging on the object side of the imaging means N.A.
- ⁇ ⁇ Wavefront aberration at the optical axis center and object height 30 ⁇ m Zernike coefficient ⁇ 4 difference (m) where Z4 is a coefficient applied to the function (2 p 2 — 1)
- TIS design Design specification of TIS flatness (difference between maximum TIS and minimum TIS) in the field of view of the device
- the design method of the imaging optical system of the mark position detection apparatus of the present invention is designed so that the imaging optical system satisfies the following conditional expression.
- the center force of the TIS measurement mark used is also the distance to the outer edge (m)
- N.A . Imaging on the object side of the imaging means N.A.
- ⁇ ⁇ Wavefront aberration at the optical axis center and object height 30 ⁇ m Zernike coefficient ⁇ 4 difference (m) where Z4 is a coefficient applied to the function (2 p 2 — 1)
- TIS design Design specification of overlay misalignment when measuring mark with zero overlay misalignment
- the design method of the imaging optical system of the mark position detection apparatus of the present invention is designed so that the imaging optical system satisfies the following conditional expression.
- the center force of the TIS measurement mark used is also the distance to the outer edge (m)
- N.A . Imaging on the object side of the imaging means N.A.
- TIS design Design specification of TIS flatness (difference between maximum TIS and minimum TIS) in the field of view of the device
- the imaging optical system evaluation method of the present invention forms an image of a substrate on which a mark having at least two step sets arranged symmetrically with respect to a predetermined axis is formed by the imaging optical system. Based on this image, the amount of deviation between the center positions of the respective step sets is measured, the amount of deviation between the measured center positions, the amount of true deviation between the center positions, and the imaging Evaluation of the performance of the imaging optical system using the distance between the center position of the mark in the field of the optical system and the optical axis center of the imaging optical system, and the numerical aperture of the imaging optical system as indices. It is.
- the imaging optical system evaluation method described above based on the measured value information of the mark measured by the imaging optical system, the imaging optical system is based on the value of ⁇ derived from the following relational force. It is preferable to evaluate the characteristics of the optical system.
- a: Center position force of step set 1 is also the distance to the step ( ⁇ m)
- N.A . Imaging on the object side of the imaging means N.A.
- ⁇ ⁇ Distance in the detection direction of the step between the optical axis center and the measurement mark center m)
- ⁇ Z Wavefront aberration at the optical axis center and object height 30 ⁇ m Zernike coefficient ⁇ 4 Absolute value of difference
- TIS measurement Measured between the center position measured between symmetrical steps and other symmetrical steps
- the measurement mark is further scanned in the field of view of the imaging optical system, and the center position of the measurement mark and the connection at a plurality of positions in the field of view are scanned.
- the distance from the optical axis center of the image optical system and the amount of deviation between the measured center positions are obtained, and the following relationship is obtained based on the measurement value information of the measurement mark in the imaging optical system field of view. It is preferable to evaluate the characteristics of the imaging optical system based on the value of ⁇ Z derived from the equation.
- ⁇ ⁇ I 830 ⁇ A TIS measurement ⁇ ⁇ . ⁇ . / [L- (a + b)]
- a: Center position force of step set 1 is also the distance to the step ( ⁇ m)
- N.A . Imaging on the object side of the imaging means N.A.
- ⁇ Z Wavefront aberration at the optical axis center and object height of 30 ⁇ m Absolute value of the difference of Zernike coefficient ⁇ 4
- ⁇ TIS measurement Difference in TIS at both ends of the field of view where the functional force when fitting the TIS variation in the field of view obtained by means of scanning the measurement mark within the field of view with a linear function (nm)
- the mark position detection device includes an imaging optical system that forms an image of a reflected light of a master composed of a plurality of steps formed on a substrate, and an imaging that captures an image formed by the imaging optical system. And a detecting means for detecting the position of the step based on an output signal from the imaging means, and the imaging optical system has a wavefront aberration of the imaging optical system expressed by a Zernike polynomial The sum total of aberration terms acting so that the position of the step detected by the signal processing means deviates from the true step position in the same direction regardless of the direction of the step is predetermined. It was designed to be within the value of.
- the imaging optical system design method of the present invention reflected light from a mark composed of a plurality of steps formed on a substrate is imaged by an imaging optical system, and formed by the imaging optical system.
- the design method of the imaging optical system of the mark position detection device that takes in the captured image into the imaging means and detects the position of the step based on an output signal from the imaging means.
- the wavefront aberration of the imaging optical system is expressed by a Zernike polynomial, among the terms of the Zernike polynomial, the term acting to shift in a different direction depending on the direction of the step, and the direction of the step
- a term that acts so as to shift in the same direction regardless of the direction of the step, and a term that works so as to shift in a different direction depending on the direction of the step at least the distribution of the aberration is Said step so that it is uniform within the field of view.
- the term that acts so as to be shifted in the same direction regardless of the direction of the difference is designed so as to have at least a characteristic of a linear distribution in the field of view of the imaging optical system.
- the present invention it is possible to provide a mark position detection device that can accurately detect the position of a mark. Furthermore, according to the present invention, it is possible to evaluate the characteristics of the imaging optical system with high sensitivity.
- FIG. 1 is a configuration diagram of an overlay measurement apparatus.
- FIG. 2 is a diagram showing measurement marks used in the simulation.
- FIG. 3 is a diagram showing an intensity distribution obtained from a mark and simulation.
- FIG. 4 is a diagram showing rays and marks in a focused and defocused state.
- FIG. 5 is a diagram showing the relationship between the defocus amount, N.A., and the detected shift amount of the step position.
- FIG. 6 is a diagram showing the aberration distribution used in the simulation.
- FIG. 7 is a schematic diagram of aberration distribution.
- FIG. 8 is a diagram showing the distribution of mark positions and aberrations.
- FIG. 9 is a graph plotting the average amount of edge deviation per unit aberration.
- FIG. 10 A diagram showing the above plot and a function fitted thereto.
- Figure 1 shows an example of an overlay measurement device.
- the illumination light beam having a broad wavelength emitted from the light source 1 as shown in FIG. 1 enters the light guide fiber 44 through the collector lens 41 and the light source relay lens 42.
- the luminous flux emitted from the light guide fiber 44 is limited by the illumination aperture stop 10 and is condensed by the condenser lens 2 to illuminate the field stop 3 uniformly.
- the field stop 3 has an SI aperture as shown in (a).
- the shape of the illumination aperture stop 10 has an annular shape as shown in (b).
- the light beam emitted from the field stop 3 is collimated by the illumination relay lens 4 and branched by the beam splitter 5.
- the light is condensed by the objective lens 6 and irradiates the wafer 21 vertically.
- the image of the slit S1 is formed on the wafer 21 through the illumination relay lens 4 and the objective lens 6.
- the wafer is transported so that the street pattern existing on the wafer forms an angle of 45 degrees with the longitudinal or lateral direction of the field stop. This is to reduce errors in autofocus operation due to pattern effects.
- the stage is moved so that the measurement mark comes to approximately the center of the position where the image of S 1 is projected.
- the image of S1 irradiates mark 20 on the wafer.
- the reflected light with the image power of S1 is L1.
- the light beam L 1 that also reflects the surface force of the wafer 21 is collimated by the objective lens 6, passes through the beam splitter 5, and is condensed again by the imaging lens 7.
- the light beam transmitted and branched by the beam splitter 14 is limited in the light beam system by the image forming aperture stop 11, passes through the image forming system parallel plane plate 17 for aberration correction, and then passes through the first relay lens 12 and the second relay lens 13.
- Image sensor Wafer mark image is formed on the surface of CCD8.
- the output signal from the image sensor CCD8 is processed by the image processing means 9, and the position of the mark on the wafer is detected, the overlay amount is measured, and the television monitor is used for observation.
- the light beam reflected and branched by the beam splitter 14 is transmitted through the AF field stop 16, collimated by the AF first relay lens 30, then transmitted through the parallel plane plate 37, and on the pupil division mirror 31.
- An image of the illumination aperture stop 10 is formed on.
- the plane parallel plate 37 is used to adjust the position of the illumination aperture stop image at the center of the pupil division mirror, and is configured to allow tilt adjustment.
- the light beam L1 is separated into two light beams by the pupil division mirror, and is condensed again by the AF second relay lens 32. Further, the light beam L1 is imaged in two positions on the AF sensor 34 via the cylindrical lens 33 in the measurement direction.
- the cylindrical lens 33 has refractive power in the non-measurement direction, and the L1 light beam forms a light source image on the AF sensor 34.
- the details of the operating principle of autofocus are described in, for example, Japanese Patent Laid-Open No. 2002-40322, and are therefore omitted in this embodiment.
- the measurement optical system composed of the plane parallel plate 17, the imaging aperture stop 11, and the second relay lens 13 is designed in the following procedure. First, set the surface shape and internal refractive index of all the optical elements that make up the measurement optical system, and the spacing between the optical elements, and set each parameter again so that the ray aberration becomes a predetermined value. Repeat this procedure until the light aberration is within the desired range.
- the wavefront aberration of the measurement optical system obtained in the previous design is fitted to the zernike polynomial with the radius P as the parameter and the radial angle as the parameter, with the exit pupil around the optical axis as 1.
- the fitting to the Zernike polynomial is performed for rays of arbitrary object height in addition to the rays at the center of the optical axis.
- the wavefront aberration of the entire optical system is evaluated from the fluctuation of the zernike polynomial obtained in this way due to the object height, and if the fluctuation amount does not fall within the specified value, the parameters of each optical element are finely adjusted to obtain the fluctuation amount. Repeat the procedure until is within the desired range.
- the test mark used is the 10 ⁇ m mouth box in box mark shown in Fig. 2.
- This mark has two step elbows, el4, and a 10 ⁇ m outer mark with the step direction convex to concave toward the center of the mark, and two steps with the step direction concave to convex toward the mark center. It consists of a 5 m mouth mark that also has step e2 and e3 forces.
- Imaging simulation was used as the simulation method.
- the zernike polynomial was used as the wavefront aberration. Table 1 shows the simulation parameters.
- the wavefront aberration at each object position is obtained as a zernike polynomial from the design value of the overlay deviation measurement optical system (imaging optical system), and fluctuations in each zernike order depending on the object position are investigated. As will be described later, this distribution generates an error TIS (Tool Induced Shift) of the overlay error.
- TIS Tool Induced Shift
- a mark is placed at a position where the optical axis force of the measurement optical system is 60 ⁇ m, and a wavefront aberration corresponding to each of the steps el, e2, e3, and e4 shown in Fig. 2 is input to perform an image simulation. .
- the object position does not have to be 60 m, but the higher the value, In consideration of the increase in TIS, 60 m is adopted here.
- TIS (x2 + x3) / 2-(xl + x4) / 2... (1 set)
- the TIS obtained in this way does not become 0, but has some value. Therefore, in order to confirm what zernike order is most effective for this TIS, we extracted only the arbitrary zerni ke order from the wavefront aberration at each edge position, input it as new aberration, and performed imaging simulation again. The degree of contribution of each zernike order was investigated by comparing the TIS based on the specific zernike order obtained and the TIS caused by the total wavefront aberration. As a result, it was found that the zernike order that most affects TIS is Z4.
- Z4 is a term representing defocus, and the defocus difference between each image plane, that is, the curvature of field affects the TIS.
- the mark shape and parameters are used, and the wavefront aberration at each object position is considered as the cause of TIS. This is the case.
- TIS is caused when each step position is shifted due to aberration or the like.
- Figures 4 (a) and (b) are enlarged views of the stepped portion of the mark.
- (A) shows no defocus
- (b) shows the case where the objective lens is defocused in the direction of separating the mark force.
- Ray A1 shows the diffracted beam at the top of the mark
- ray A2 shows the stepped portion
- ray A3 shows the diffracted beam at the bottom of the mark.
- A1 to A2 are in the same phase, but A2 undergoes a sudden phase change across the step. That For this reason, the intensity in the image formation calculation also changes, and this position is recognized as an edge.
- Fig. 5 (a) shows the state of light when the defocus amount is different, and (b) shows the state of light when N.A. is different.
- C2 has a larger defocus due to the large amount of aberration of zernike coefficient Z4 compared to ray C1.
- D2 has a larger N.A of light than D1.
- the deviation direction of the detected step position is different. It will be the opposite. That is, when the objective lens is defocused in the direction approaching the mark, the detected step position is observed to be shifted to the concave side of the step.
- each zernike polynomial It was found that the orders can be classified into two types with respect to the deviation direction of the mark step detected by the measurement optical system.
- One is a type of aberration that is detected when the amount of aberration is uniform across the entire mark, regardless of the direction of the step, so that all steps are detected with the same amount of displacement in the same direction, and the zernike coefficients Z2, Z7, etc. .
- the other is a type of aberration that is detected when the deviation amount of the step position detected differs depending on the direction of the step, although the absolute value of the step deviation amount is approximately equal when the amount of aberration is uniform over the entire mark surface.
- the zernike coefficient Z4, Z5, etc. is equivalent to this.
- Figures 6 (a) and 6 (b) show the aberration distribution of each zernike order set in the simulation.
- typel is an aberration distribution that is proportional to the object position with a difference of 0 ⁇ ⁇ at the center of the mark, and an aberration distribution that is proportional to the object position.
- 3 is the same as type2 at the left outer edge position—SOm A, and an aberration distribution with twice the slope of typel, which is 40m ⁇ at both ends.
- type4 is a curved aberration distribution with the amount of aberration changed by 3m ⁇ to the positive side at the edge positions on both outer sides of type2, type5 is the edge position on the left outer side of type2, + 3 ⁇ ⁇ , outer right This aberration distribution is symmetric with respect to the center of the edge position of -3m ⁇ .
- Table 2 shows the steps el, e2, e3, and e4 detected by zernike coefficient ⁇ 4 being measured in the measurement optical system having the aberration distribution, and Table 3 being detected in the measurement optical system having Z7 being the aberration distribution.
- the travel distance xl to x4 the average travel distance of the inner step, the outer step, and the TIS are listed together.
- Type 1 9.9 2.0 One 2.0 -9.9 0.0 0.0 0.0
- the TIS increases as the aberration variation at the object position increases. There is an almost proportional relationship between the amount of fluctuation and TIS.
- TIS hardly occurs if the aberration variation at the object position is linear. Even if the linear distribution force deviates, if the aberration distribution is point-symmetric with respect to the mark center, TIS will hardly occur! /. In other words, the TIS increases as the aberration deviates from the center of the mark.
- the original aberration distribution is the aberration distribution 1 in FIG. 7 (a).
- x4 a (a> 0).
- TIS2 [(a + b) + (one a c)] / 2 a + (a + d)] / 2
- TIS3 (one b— c) / 2 (one a— d) / 2
- TIS4 ( ⁇ b-c) / 2-[(-a + e) + (-d + l)] / 2
- the difference between e and! ⁇ That is, the deviation of the linear distribution of aberrations is in the opposite direction.
- the aberration distribution is required to be close to point symmetry with respect to the mark center.
- the aberration must be as flat as possible over the entire mark.
- Z4 defocus
- Z5 pass
- TIS occurs when using a box in box mark with an actual measurement device.
- Z4 in order to generate TIS of 2.5 (nm), Z4 requires a linear component of aberration that is about 3 (m ⁇ ) difference at both ends of the mark, while ⁇ 7 has a deviation from the linear distribution of 3 ( A swell component of m ⁇ ) is required.
- Design value of the measurement optical system Force When calculating the wavefront aberration distribution, the zernike orders have different magnitudes, such as the direction of the waviness of the distribution. Is also dominant. In fact, as described above, in the simulation using the wavefront aberration of the design value, TIS occurs almost only at Z4.
- TIS becomes 0 when a mark is placed on the optical axis.
- the zernike component Z4 has symmetry with respect to the optical axis. This is because even when the aberration distribution is not completely flat, the aberration amounts are equal between the inner stepped positions and the outer stepped positions.
- the contribution ratio of Z4 force is considered to be small.
- Fig. 8 shows the distribution of the zernike coefficient Z4 and how the marks are arranged in the center. Since the distribution of Z4 is well divided by the quadratic function based on the study of the design value, the quadratic function distribution was also used in this simulation. In addition, as an index representing the distribution of Z4, the difference between the aberration amount of Z4 at the center of the optical axis and the aberration amount of ⁇ 4 at a position 30 ⁇ m away from the center of the optical axis in the step detection direction ⁇ Z (m ⁇ ) Value was adopted.
- the difference of ⁇ 4 at the optical axis center position and a position shifted by 30 m in the optical axis central force step detection direction is used as an indicator of the Z4 distribution, but the same discussion is possible at any object position. Yes, and of course, a function fitted to the Z4 distribution can be used as an index.
- the mark to be measured is a box in box mark with a distance 2 & (m) between the outer steps and a distance 2b (; zm) between the inner steps, and the measurement direction of the step between the center position of the optical axis and the center position of the mark
- the amount of displacement at is ⁇ (/ ⁇ ).
- the aberration difference ⁇ (outside) and ⁇ (inside) between the outer step and the inner step are expressed by the following equations.
- the average deviation of the step position per unit aberration and the measurement optical system Have the following relationship (described later).
- TIS (-4 ⁇ ⁇ ⁇ -b I 900 X 0.27 / N.A.)
- the aberration used is the zernike coefficient Z4.
- This Z4 distribution is linear, and the three aberration types are linear distributions with a difference of 5, 20, and 40 meters between the value of aberration at one end of the mark and the value at the other end.
- the simulation was performed.
- the mark shape shown in Fig. 2 is used.
- simulation was performed under the conditions of NA 0.3, 0.5, 0.6, and 0.7, and the average amount of movement at the inner and outer step positions was determined.
- Figure 9 is a plot of this value divided by the difference in aberration at each step.
- the horizontal axis represents NA
- the vertical axis represents the average edge movement ⁇ per unit aberration.
- FIG. 10 shows the data obtained by inverting the sign of the outer step data, the measurement data including the inner step data, and the above function plotted. This result shows that it is inversely proportional to N.A. This is discussed below.
- zernike coefficient Z4 is 2 p 2 - 1 (p is approximately equivalent to NA) is expressed as, p is is normalized at the maximum NA.
- NA0.5 is the displacement force S5m from the ideal wavefront at NA
- NA0.7 is the displacement force 5 m from the ideal wavefront at that time.
- the defocus amount is proportional to 1 I NA2.
- the edge shift amount is proportional to both the defocus amount and N.A. as already described with reference to FIGS. 5a and 5b. Therefore, when the aberration amount of zernike coefficient Z4 is equal,
- the force derived from the amount of aberration at a predetermined image height of the measurement optical system to determine how much Z4 should be suppressed according to the TIS specification value of the apparatus is derived. This will be described below.
- TIS measurements are sequentially performed while moving the mark shown in Fig. 2 within the field of view of the measurement optical system, and the change characteristics of TIS are examined in the field of view. If you have, make adjustments. This makes it possible to bring the aberration close to a nearly symmetrical distribution in the field of view with respect to the center of the field of view.
- This tilt component can be improved to some extent by optical adjustment, but there is a limit that can be improved by adjustment, and it cannot be reduced below a certain value.
- the main cause of this is the Szernike coefficient Z4.
- the flatness of the TIS has a standard that matches the specifications of the device.As shown in the first embodiment, the amount of fluctuation of the zernike coefficient Z4 in the design of this standard force device is reduced by Can be derived.
- Equation 3 the distance between the optical axis center and the mark center ⁇ and TIS are constants, and the relationship between ⁇ and TIS is shown as follows.
- TIS (-0.0012 ⁇ AZ- (a + b) / N.A.) ⁇ ⁇ ... (5 formulas)
- ATIS I (-0.0012 ⁇ AZ- (a + b) / ⁇ . ⁇ .) ⁇ (-L / 2)
- NA 0.5
- the mark to be measured is the mark shown in Fig. 2
- the distance between the outer steps is 10 ⁇ m
- the distance between the inner steps is 5 ⁇ m
- the field size is 50 ⁇ m.
- the specification of TIS flatness in the field of view is 2
- the fluctuation of the zernike coefficient ⁇ 4 at a position 30 ⁇ m away from the optical axis must be less than 2 m ⁇ .
- TIS measurement is caused by various factors.
- this factor is mainly ⁇ 4
- the size of ⁇ 4 can be expressed as follows by transforming equation (3).
- Eq. 8 is when the TIS factor is mainly Z4, and can be used particularly effectively when the entire mark deviates from the center of the optical axis, that is, ⁇ > a.
- the design stage force should also be configured so that the aberration distribution is a linear distribution even for aberration terms where the detected deviation of the step position does not depend on the step direction. Therefore, the TIS of the measurement optical system can be further suppressed to a small value.
- the mark used for the force described using the box in box mark as an example is not limited to this.
- the shape is not limited as long as it is composed of at least two sets of steps arranged symmetrically, such as a plurality of convex lines and concave lines, combinations thereof, and combinations of line marks and box marks.
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US7589832B2 (en) | 2006-08-10 | 2009-09-15 | Asml Netherlands B.V. | Inspection method and apparatus, lithographic apparatus, lithographic processing cell and device method |
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WO2017145155A1 (en) | 2016-02-22 | 2017-08-31 | Real View Imaging Ltd. | A method and system for displaying holographic images within a real object |
US10795316B2 (en) | 2016-02-22 | 2020-10-06 | Real View Imaging Ltd. | Wide field of view hybrid holographic display |
US11663937B2 (en) * | 2016-02-22 | 2023-05-30 | Real View Imaging Ltd. | Pupil tracking in an image display system |
JP7506756B2 (ja) * | 2020-04-05 | 2024-06-26 | ケーエルエー コーポレイション | 位置ずれ測定値に対するウェハ傾斜の影響の補正のためのシステムおよび方法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2951366B2 (ja) * | 1990-06-08 | 1999-09-20 | オリンパス光学工業株式会社 | 干渉測定装置とそのアライメント検出方法 |
JP2000146528A (ja) * | 1998-09-10 | 2000-05-26 | Fujitsu Ltd | 位置ずれ検査装置の光学的収差測定方法並びに位置ずれ検査方法 |
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JP4725822B2 (ja) * | 2000-07-10 | 2011-07-13 | 株式会社ニコン | 光学的位置ずれ検出装置 |
JP2002175964A (ja) * | 2000-12-06 | 2002-06-21 | Nikon Corp | 観察装置およびその製造方法、露光装置、並びにマイクロデバイスの製造方法 |
CN100346150C (zh) * | 2000-12-28 | 2007-10-31 | 株式会社尼康 | 成象状态调节法、曝光法及设备以及器件制造方法 |
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2005
- 2005-10-17 WO PCT/JP2005/019049 patent/WO2006046428A1/ja active Application Filing
- 2005-10-17 US US11/661,396 patent/US20070258624A1/en not_active Abandoned
- 2005-10-24 TW TW094137129A patent/TW200625404A/zh unknown
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JP2951366B2 (ja) * | 1990-06-08 | 1999-09-20 | オリンパス光学工業株式会社 | 干渉測定装置とそのアライメント検出方法 |
JP2000146528A (ja) * | 1998-09-10 | 2000-05-26 | Fujitsu Ltd | 位置ずれ検査装置の光学的収差測定方法並びに位置ずれ検査方法 |
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TW200625404A (en) | 2006-07-16 |
US20070258624A1 (en) | 2007-11-08 |
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