WO2006011185A1 - 半導体装置の検査方法、その検査装置及びその検査に適した半導体装置 - Google Patents
半導体装置の検査方法、その検査装置及びその検査に適した半導体装置 Download PDFInfo
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- WO2006011185A1 WO2006011185A1 PCT/JP2004/010485 JP2004010485W WO2006011185A1 WO 2006011185 A1 WO2006011185 A1 WO 2006011185A1 JP 2004010485 W JP2004010485 W JP 2004010485W WO 2006011185 A1 WO2006011185 A1 WO 2006011185A1
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- electron beam
- measurement
- semiconductor device
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- semiconductor
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/26—Electron or ion microscopes; Electron or ion diffraction tubes
- H01J37/295—Electron or ion diffraction tubes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B15/00—Measuring arrangements characterised by the use of electromagnetic waves or particle radiation, e.g. by the use of microwaves, X-rays, gamma rays or electrons
- G01B15/02—Measuring arrangements characterised by the use of electromagnetic waves or particle radiation, e.g. by the use of microwaves, X-rays, gamma rays or electrons for measuring thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/20—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by using diffraction of the radiation by the materials, e.g. for investigating crystal structure; by using scattering of the radiation by the materials, e.g. for investigating non-crystalline materials; by using reflection of the radiation by the materials
- G01N23/20058—Measuring diffraction of electrons, e.g. low energy electron diffraction [LEED] method or reflection high energy electron diffraction [RHEED] method
Definitions
- the present invention relates to a method for inspecting a result of performing a manufacturing process in an LSI (large scale integration) device manufacturing process, an inspection apparatus thereof, and a semiconductor device suitable for the inspection,
- the present invention relates to an inspection method, an inspection apparatus, and a semiconductor device suitable for the inspection, which are used for immediately and accurately inspecting a cross-sectional microstructure of an LSI device, which is obtained as a result of a manufacturing process.
- measurements related to the planar structure of LSI devices are usually performed immediately, such as measurements related to force-cross-sectional structures, such as the growth of gate oxide films.
- the length measurement during the process, the length measurement during the growth process of the shallow trench insulating film, the length measurement during the diffusion prevention film growth process that prevents the diffusion of metal from the metal wiring, etc. are performed immediately during the manufacturing process. In addition, this was not done to accurately measure the results of the manufacturing process.
- an electron beam irradiation part an electron transmitted through a sample, or an electron used to guide an electron scattered by the sample to a detector
- a TEM device composed of a lens, a diaphragm for adjusting the amount of electron beam, and a transmission electron detection unit for detecting a transmission electron beam is used.
- the aperture of the diaphragm is fixed when observing the sample.
- the amount of electrons led to the transmission electron detector by the electron lens was determined.
- the structure of the semiconductor detector that also functions as a diaphragm for the transmission electron detector is changed to a structure similar to the diaphragm / semiconductor detector shown in FIG.
- the aperture of the semiconductor detector variable, it was devised to restrict the passage of unintended scattered electrons from the aperture / semiconductor detector, and the electron diffraction image obtained after passing through the sample obtained by the TEM device was improved. ing.
- Patent Document 1 Japanese Patent Laid-Open No. 6-139988
- the diaphragm / semiconductor detector shown in FIG. 1 includes a semiconductor detector 1, a fixing pin 2, a lever pin 4, a guide hole 3, and a rotation.
- the transmission electron detector and the semiconductor detector 1 can obtain a dark-field or bright-field electron diffraction image corresponding to the amount of electrons captured by each.
- the diaphragm shown in FIG. 2 includes a lower diaphragm plate 133 having a plurality of aperture sets each having four sets of sizes of openings, an upper diaphragm plate 130 having a set of the aperture sets, and a lower diaphragm plate.
- the lower holding mechanism 134 of 133, the holding mechanism 131 of the upper diaphragm plate 130, the lower throttle hole 136 of the lower diaphragm plate 133, and the upper throttle hole 132 of the upper diaphragm plate are also configured. Has been.
- the electron beam 135 can be further narrowed to an arbitrary amount by slightly shifting the upper diaphragm plate 130 and the lower diaphragm plate 133.
- Patent Document 1 Japanese Patent Laid-Open No. 6-139988
- Patent Document 2 JP-A-5-217536
- a method for measuring a result of a manufacturing process for a cross-sectional structure immediately and accurately during a manufacturing process of a semiconductor device a measuring apparatus for the method, and a semiconductor device suitable for the measurement.
- the first invention is a sample preparation step for preparing a sample by thin-filming a crystal part, and irradiating the sample with an electron beam and transmitting the sample.
- the electron beam diffracted by the crystal portion included in the transmitted electron beam is narrowed to an arbitrary amount, and electron beam imaging is obtained from the transmitted electron beam, and the crystal partial force is obtained during the electron beam imaging.
- a measuring method characterized by comprising a step of comparing the width of the checkered stripe with the width of an arbitrary portion.
- the lattice fringes obtained from the crystal portion in the sample without strictly controlling the thickness of the sample are obtained.
- any part of the semiconductor device including the semiconductor crystal substrate for example, the result obtained by the manufacturing process of the semiconductor device (the gate oxide film This has the effect of measuring the width of the thickness.
- the second invention is a FIB irradiation device that irradiates the sample with FIB from one angle, and an electron beam with respect to the sample from the other angle.
- a measuring apparatus comprising an electron beam aperture whose size is adjustable.
- a third invention is a semiconductor device including a circuit element constituting a semiconductor circuit, a measurement element used for measurement, and a cutting region for individually cutting.
- the semiconductor device is formed on a semiconductor substrate, and the circuit element and the measurement element are the same in cross-sectional structure, are within the cutting region, and individually cut the semiconductor device from the semiconductor substrate.
- the semiconductor device is characterized in that the measurement element is disposed at a position where the measurement element is cut, and the cut surface of the measurement element is used for measurement.
- the measurement method according to the first invention is performed because the cross section of the measurement element is in an observable state when the semiconductor devices are cut individually. Suitable for Further, since the measuring element is located at the end of the semiconductor device, there is an effect that the length can be easily measured using the measuring device of the second embodiment. Furthermore, since the measuring element and the circuit element have the same structure, the circuit element is not destroyed and the result of the manufacturing process can be obtained immediately and accurately during the manufacturing process. There is an effect that can be measured.
- FIG. 1 is a diagram showing an electron beam aperture of the TEM apparatus of Conventional Example 1.
- FIG. 2 is a diagram showing the electron beam aperture of the TEM device of Conventional Example 2.
- FIG. 3 is a diagram showing how the electron beam 13 transmitted through the sample 10 and the scattered electron beam 14 form an electron diffraction image 12.
- FIG. 4 is a flowchart of the inspection method according to the first embodiment.
- FIG. 5 is a diagram illustrating a sample preparation process for thinning a sample in the inspection method according to Example 1.
- FIG. 6 is a diagram illustrating an image sharpening process in the inspection method according to Example 1 to remove an excess electron beam and to sharpen an image.
- FIG. 7 shows a step of comparing the lattice fringe spacing by the crystal lattice with the thickness of the portion added by the manufacturing step in the inspection method according to Example 1.
- FIG. 8 is a schematic diagram of an apparatus according to a second embodiment.
- FIG. 9 is a flowchart for measuring the length of the part added by the manufacturing process by the apparatus according to the second embodiment.
- FIG. 10 is a diagram showing the direction of the electron beam and the direction of the FBI when the shapes of the three types of samples are different.
- FIG. 11 is a diagram illustrating a diaphragm used in a diaphragm adjustment process for the purpose of removing an electron beam in the apparatus according to the second embodiment.
- FIG. 12 is a diagram showing a modification of the diaphragm.
- FIG. 13 is a diagram showing an arrangement position of an end of a semiconductor chip on a semiconductor substrate and a monitor element.
- FIG. 14 shows the above-described monitor element 101 of the semiconductor chip 100 in the upper diagram, and in the enlarged view, the element cross section 103 of the monitor element 101 can be irradiated with an electron beam by processing by FIB irradiation. It is a figure which shows the sample 105 carved out in the shape.
- FIG. 15 is a diagram showing a cross section of a circuit element and a cross section of a monitor element.
- An example of a measurement that immediately and accurately grasps the results of the LSI device manufacturing process is a measurement that measures the microstructure of LSI devices.
- length measurement related to the planar structure of LSI devices for example, measurement of photoresist width, etc.
- length measurement related to a cross-sectional structure for example, during the growth process of a gate oxide film
- Length measurement, length measurement during shallow trench insulation film growth process, length measurement during diffusion prevention film growth process to prevent metal diffusion from metal wiring has the following problems and is not easy It was.
- the first problem is that the object to be measured, that is, the cross-sectional structure is very fine (for example, the gate oxide film is about 0.5 mm) even by magnifying observation with a normal electron microscope or the like. Therefore, observation was not easy.
- TEM Transmission Electron Microscope
- FIG. 3 is a diagram showing how the electron beam 13 transmitted through the sample 10 and the scattered electron beam 14 form an electron diffraction image 12. That is, the sample 10 has a crystal part 15, and when irradiated with an electron beam, an electron beam 13 that is hardly scattered by the sample and a scattered electron beam 14 are generated. Both the electron beam 13 transmitted without being scattered and the scattered electron beam 14 are converged when passing through the electron lens 11. As a result, both the electron beam 13 that has been transmitted without being scattered and the electron beam 14 that has been scattered pass through the diaphragm 17, and the electron beam is detected by the detector, thereby corresponding to the crystal portion 15 of the sample 10. An electron diffraction image 12 including the image 16 is formed.
- the second problem is as follows. First, in order to perform length measurement, high accuracy is required to determine the length. However, it is not easy to determine the exact length of the observation object from the observation image unless the viewpoint of observing the cross-sectional structure is also facing frontal force with respect to the object to be measured. For example, if the exact length of the object to be observed is a, the length in the observation image is b, and the object is observed from a direction tilted X degrees from the normal of the object to be observed, a is obtained by dividing b by cosX. This is because it is impossible to accurately determine the direction of the viewpoint from the observation image alone, and hence the exact length a of the observation target cannot be determined.
- Example 1 for solving the above problem will be described.
- FIG. 4 showing a flowchart
- FIG. 5 showing a sample preparation process, irradiating the sample with electrons, and narrowing the electron beam transmitted through the sample to an arbitrary amount
- FIG. 6 showing an image sharpening process for obtaining a clear electron diffraction image by removing an extra electron beam
- FIG. 7 showing a length measurement process
- FIG. 4 shows a flowchart of the measurement method according to the first embodiment.
- the measurement method according to Example 1 includes a sample preparation step 20 in which a part to be measured, that is, an observation target is taken out and a sample is prepared by thinning the film, and the sample is irradiated with electrons and transmitted through the sample. Equivalent to the crystal part of the sample in the image sharpening step 22 to obtain a clear electron diffraction image by narrowing down the beam to an arbitrary amount, that is, by removing the extra electron beam Compare the width of the checkered part and the width of the part added by the manufacturing process. , Which includes a length measuring step 24 for specifying the actual thickness of the portion added by the manufacturing step.
- FIG. 5 illustrates a sample preparation step 20 for thinning the observation target.
- FIG. 5 is composed of a left diagram showing the observation target 31 in the semiconductor chip 30 and a right diagram showing the process of thinning the observation target 31.
- the observation object 31 in the semiconductor chip 30 is cut out from the semiconductor chip 30 as indicated by an arrow.
- irradiate FIB32 from the top cut the observation target 31 so that the crystal substrate 34 and the part 35 added in the manufacturing process appear in the same cross section, and make the sample 33 by thinning the film. Step 20.
- the thin film In the case of a thin film, the example in which the FIB 32 is irradiated from above is shown as a thin film.
- the thin film may be formed by means such as polishing of the observation object 31.
- FIG. 6 shows an image sharpening step 22 in which an excess electron beam is removed to sharpen an image.
- a transmission electron beam 43 that hardly diffracts and a transmission electron beam 44 that is diffracted are generated, and the electron lens 41 causes the electron beam 41 to appear on the detector.
- An electron diffraction image 42 including an image 46 of the crystal portion can be obtained.
- the image sharpening step is a step of clarifying lattice fringes due to the crystal lattice in the image 46 of the crystal portion by removing the passage of extra diffracted transmitted electrons 44.
- FIG. 7 shows a length measurement step 24 including an operation of comparing the interval between lattice fringes due to the crystal lattice and the width of the portion added by the manufacturing step on the electron diffraction image.
- the crystal lattice fringes are clear in the image 52 of the crystal portion in the electron diffraction line image. Therefore, the lattice fringe spacing indicated by the solid line 53, that is, the width indicated by the white arrow 54 is measured on the electron diffraction image and compared with the width of the portion 50 added in the manufacturing process on the electron diffraction image. And find the ratio.
- the actual crystal lattice constant and the above ratio force are also calculated in the actual thickness of the part added in the manufacturing process, for example, the actual thickness of the gate oxide film 50 and the interlayer insulating film 51.
- This is a length measurement process 24 for specifying the thickness of the added portion.
- the actual thickness of the portion added by the manufacturing process including the operation of comparing the width of the lattice fringes obtained from the substrate crystal with the width of the portion added by the manufacturing process
- the measurement method includes a length measurement process for identifying the above. Therefore, according to the measurement method of Example 1, the lattice fringes obtained from the substrate crystal became clear by narrowing down the electron beam diffracted at the crystal part without strictly controlling the thickness of the sample.
- the length of the result obtained by the manufacturing process (for example, the thickness of the gate oxide film) is measured based on the spacing of the lattice fringes of the substrate crystal in the electron diffraction image. There is an effect that can. In addition, since the length is measured based on the interval between the lattice fringes obtained from the substrate crystal, there is an effect that the direction in which the sample is observed does not have to be strictly the front. Since the interval between the lattice stripes is a physical constant and is always a constant value, the correlation between the length in the image and the actual length is calculated by comparing the interval between the lattice stripes and the width of the lattice stripes on the image. It is the power that can be.
- Measurement of cross-sectional structure of LSI devices for example, measurement during the growth process of gate oxide film, measurement during growth process of shallow trench insulating film, diffusion to prevent metal diffusion from metal wiring
- length measurement such as length measurement during the growth process of the preventive film
- FIG. 7 shows an outline of the apparatus according to the second embodiment
- FIG. 9 shows a flowchart of the measurement performed using the apparatus
- FIG. 10 is used to explain the aperture used in the sharpening process.
- the apparatus according to the second embodiment shown in FIG. 8 is a signal processing circuit that processes signals from the controller 60, the ion beam control system 61, and the electron beam detector 64 to form an electron beam diffraction image.
- 62 a stage drive circuit 63, an aperture for adjusting the amount of the electron beam, an electron beam detector 64 for detecting the electron beam transmitted through the sample 66, and the FIB and the electron beam go straight with respect to the sample 66.
- a sample chamber 65 that maintains a reduced pressure state
- a sample stage 67 on which the sample 66 is placed a FIB irradiation device 68 that irradiates the sample 66 with the FIB toward the sample 66
- an electron beam irradiation device 69 that irradiates the electron beam toward the sample 66.
- an electron beam control system 70 an electron beam control system 70.
- the controller 60 includes a calculation and control circuit such as a CPU, and includes an ion beam control system 61 that controls the FIB irradiation device 68, an electron beam irradiation device 69 that controls the electron beam irradiation device 69, and a signal processing circuit 62. And a command is sent to the stage drive circuit 63 that drives the sample stage 67.
- the apparatus according to the second embodiment operates along the flowchart shown in FIG. 9, and can measure the length of the part added by the manufacturing process.
- FIG. 9 shows a flowchart for measuring the length of the part added by the manufacturing process by the apparatus according to the second embodiment.
- the controller 60 sends a command to the stage drive circuit 63 to position the sample 66 on the sample stage 67, and through the ion beam control system 61 from above the sample 66.
- the FIB is irradiated from the FIB irradiation device 68, and the thin film of the sample 66 is applied to optimize the thickness of the sample 66.
- the controller 60 sends a command to the electron beam control system 70 and irradiates the sample 66 from the electron beam irradiation device 69. To do.
- the direction in which the electron beam irradiation device 69 faces is different from the direction in which the FIB irradiation device 68 faces. This is because the force of irradiation from above is suitable for the thin film of sample 66 by FIB irradiation. To observe the cross section of sample 66 by transmission of electron beam, the electron beam irradiation requires both lateral force and electron beam. It is because it is suitable to irradiate. However, FIB The direction of irradiation and the direction of electron beam irradiation need not be orthogonal. This is because the irradiated electron beam can be expected to pass through the sample 66, and irradiation from a direction not colliding with the FIB irradiation apparatus is sufficient.
- Figure 10 consists of the left figure, the center figure, and the right figure.
- the electron beam direction and FBI direction are shown for the three types of sample shapes.
- the figure on the left shows the FIB irradiation direction and the electron beam radiation direction for the sample 115 having a projection and an inclined portion used for cross-sectional observation.
- the FIB is also irradiated with upward force to make the protrusion part thin, and the electron beam is emitted from the upper right side of the slope in accordance with the inclined part.
- the shape like the sample 115 is to observe the cross section at the end of the semiconductor chip when the shape of the sample 115 before cutting out the protruding portion is as large as the semiconductor chip. This is because it is difficult to cut the entire semiconductor chip so that the entire semiconductor chip fits below the protruding portion, so that it is difficult to take time, so the inclined portion is provided in the direction in which the electron beam is emitted.
- the central figure shows that when the sample 118 has only a protrusion and the protrusion is facing upward, FIB irradiation is performed with an upward force, and the electron beam is emitted with a lateral force of the protrusion. Is shown.
- Sample 118 has an inverted T shape because it is the force of scraping off both ends of sample 118, where the original shape of sample 118 becomes so large, by FIB irradiation.
- the right figure shows that when sample 121 has only a protruding part and the protruding part is directed to the right, FIB irradiation was performed with the right side force, and electron beam emission was also performed with the upward force. It is a thing. The reason why the sample 121 is tilted sideways is that the upper and lower ends of the sample 121 where the original shape of the sample becomes so large are scraped off by FIB irradiation.
- the controller 60 sends a command to the signal processing circuit 62 and receives the signal received by the electron beam detector 64 that detects the electron beam transmitted through the sample 66. By processing, an electron beam diffraction image is formed.
- the controller 60 sends a command to the signal processing circuit 62 to adjust the amount of the electron beam that has passed through the sample, and the electron beam detector 64 has an electric Adjust the size of the aperture of the diaphragm that adjusts the amount of the child wire.
- the electron beam diffracted by the crystal part of sample 66 is narrowed, and the density of the image of the crystal part becomes clear.
- the diffraction grating stripes appearing in the crystal portion in the electron beam diffraction image become clear.
- step 75 for determining the state of thinning of the sample 66 it was determined whether or not the obtained electron beam diffraction image was sufficiently clear as a result of adjusting the size of the aperture of the diaphragm. to decide.
- the controller 60 is instructed to return to the sample preparation step 71 again by specifying the amount of thinning.
- the process proceeds to the next step.
- the length measurement step 76 includes an operation of comparing the width of the lattice stripe formed by the crystal portion of the sample in the electron beam diffraction image with the width of the portion added by the manufacturing step. After the comparison, the manufacturing process adds the lattice constant of the crystal part of the sample and the ratio of the lattice fringe width and the width of the part added by the manufacturing process obtained as a result of the above comparison. Determine the actual thickness of the part.
- FIG. 11 shows the diaphragm of the electron beam detector 64.
- 11 is composed of an upper diagram showing the plate 80 constituting the diaphragm 84 and a lower diagram showing the entire diaphragm 84. That is, the diaphragm 84 shown in the lower diagram of FIG. It is composed of two protruding plates 83, a rectangular opening 81 with a constant width, and a plate 80 having an opening 82 that has almost the same shape as the egg cross section. It has an opening 85 in the part where the opening 82 has almost the same shape as the cross section of the above egg.
- the size of the opening 85 can be adjusted by sliding the other plate force S against one plate. If the size of the opening 85 changes by sliding the plate, it is not necessary that the opening 82 has almost the same shape as the cross section of the egg. It may be a shape (for example, a fan shape) or may be an elliptical shape.
- FIG. 12 shows a modified example of the diaphragm.
- FIG. 12 is composed of a right view showing the diaphragm 112 and a left view showing the plate 111 constituting the diaphragm 112.
- the plate 111 has an opening 110 having a shape substantially the same as the cross section of the egg.
- the diaphragm 112 is configured by stacking eight plates 111.
- One of the eight plates is arranged at an angle of 0 °, and then the other plates are sequentially arranged at an angle of 45 °. It is configured by stacking on top. Furthermore, as a result of the overlapping of the openings 110 of the respective plates, an opening 113 is formed as a common part of the openings 110. Then, by simultaneously sliding the respective plates 111 by the same amount, the size of the opening 113 can be made continuously variable, and the opening 113 can be adjusted to an arbitrary size.
- the purpose of the opening 110 having an egg-shaped cross section is that the opening 113 is substantially circular. Therefore, the egg-shaped cross-section is actually a figure obtained by overlapping a plurality of circles with gradually increasing radii while sliding the center position little by little.
- the measurement apparatus according to Example 2 described above irradiates the measurement object with an electron beam from one angle and the FIB irradiation apparatus that irradiates the measurement object with FIB from the other angle.
- an electron beam aperture capable of continuously adjusting the thickness.
- the electron beam can be narrowed to an arbitrary amount by the above-described electron beam diaphragm, and therefore the measuring method shown in the first embodiment can be performed by the measuring apparatus according to the second embodiment. .
- the measuring apparatus according to the second embodiment is an optimal measuring apparatus for carrying out the measuring method according to the first embodiment.
- the FIB irradiation device and the electron beam irradiation device are combined, the observation results with the TEM device can be found immediately after sample preparation, and the time required for trial and error for sample preparation can be shortened.
- Measurement of cross-sectional structure of LSI devices for example, measurement during the growth process of gate oxide film, measurement during growth process of shallow trench insulating film, diffusion to prevent metal diffusion from metal wiring
- length measurement such as length measurement during the growth process of the protective film
- a test for measuring the cross-sectional structure Despite the need to create a material and to expose the cross-sectional structure on the element portion of the semiconductor device, there was a problem that it took time and effort to identify the element to be processed.
- FIG. 13 showing an outline of the semiconductor device according to the third embodiment and FIG. 14 showing a measurement sample created using the semiconductor device will be used.
- FIG. 13 includes a left view showing the semiconductor substrate 90 and a right view in which the end of the semiconductor chip 92 on the semiconductor substrate is enlarged.
- semiconductor chips 92 on which circuit elements are formed are produced in a row and column state.
- a scribe region for separating the semiconductor chip 92 from the semiconductor substrate 90 is disposed at the end of the semiconductor chip 92 shown in the right diagram of FIG.
- the scribe region is provided with a scribe line 91 for guiding the blade of the device for cutting the semiconductor chip 92 so as not to swing left and right in order to prevent the semiconductor chip from being damaged. Furthermore, if the semiconductor chip 92 is cut along the scribe line 91 in the scribe region, a monitor element 93 is arranged at a position where the semiconductor chip 92 is cut at the same time.
- the monitor element 93 has the same structure as the circuit element on the semiconductor chip 92 in a cross-sectional structure. Accordingly, when the semiconductor chip 92 is individually cut, the FIB is irradiated in the apparatus according to the second embodiment, and after the monitor element 93 is carved into the shape as shown in FIG. By irradiating with an electron beam, an electron beam diffraction image reflecting the cross-sectional structure of the monitor element 93 can be obtained.
- the sample 105 shown in the enlarged view of FIG. 14 is obtained by processing the upper monitor element 101 of the semiconductor chip 100 shown in the upper diagram of FIG. 103 is a sample 105 carved into a shape that can be irradiated with an electron beam.
- the sample 105 includes a protrusion 102 that irradiates a rectangular parallelepiped electron beam having a thickness of about 50 nm to 200 nm at a distance of about 100 ⁇ m to 200 ⁇ m from the edge of the semiconductor chip 100, and subsequently the angle. And an inclined portion 104 of 45 degrees or less.
- the inclined portion 104 is provided so that the electron beam can be irradiated from the side where the inclined portion 104 exists toward the portion 102 where the electron beam is irradiated.
- the monitor element 101 can have the same cross section as the circuit element on the semiconductor chip 100, or a partial cross section of the circuit element.
- the shape of an insulating element that insulates circuit elements can be provided.
- FIG. 15 is a diagram showing a cross section of the circuit element and a cross section of the monitor element.
- the cross section includes a cross sectional view 125, a cross sectional view 126, a cross sectional view 127, and a cross sectional view 128.
- a cross-sectional view 125 shows a part of a cross section of a MOS transistor as a circuit element and an insulating element that electrically isolates the MOS transistor.
- the cross-section 126 shows a monitor element having the same cross-sectional structure as the MOS transistor which is a circuit element.
- the cross section 127 shows a monitor element having a cross sectional structure in which only the gate oxide film portion of the MOS transistor as a circuit element is taken out.
- the cross-sectional view 128 shows a monitor element having a cross-sectional structure in which an insulating element for separating a MOS transistor is taken out.
- the semiconductor device is a semiconductor device including a circuit element constituting a semiconductor circuit, a measurement element used for measurement, and a cutting region for individual separation.
- a semiconductor device is fabricated on a semiconductor substrate, and the circuit element and the measurement element are identical in cross-sectional structure, and are individually cut from the semiconductor substrate within the cutting region.
- the measurement element is arranged at a position where the measurement element is cut, and the cut surface of the measurement element is used for measurement.
- the cross section of the measurement element is in an observable state. Therefore, the measurement method of Example 1 can be easily performed for the measurement element. Can be implemented.
- the measurement element and the actual circuit element in the semiconductor device have the same structure in whole or in part, the structure of the circuit element is the same without destroying the actual circuit element. This has the effect of measuring the structure of the measuring element. Further, since the measuring element is located at the end of the semiconductor device, there is an effect that the length can be easily measured by the measuring method of Example 1 using the measuring device of Example 2.
- Electron beam irradiation device
- Image sharpening process for obtaining a clear electron diffraction image Process for determining the state of thinning
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PCT/JP2004/010485 WO2006011185A1 (ja) | 2004-07-23 | 2004-07-23 | 半導体装置の検査方法、その検査装置及びその検査に適した半導体装置 |
JP2006527713A JP4567684B2 (ja) | 2004-07-23 | 2004-07-23 | 測定方法及び測定装置 |
US11/654,663 US7465923B2 (en) | 2004-07-23 | 2007-01-18 | Testing method for semiconductor device, testing apparatus therefor, and semiconductor device suitable for the test |
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PCT/JP2004/010485 WO2006011185A1 (ja) | 2004-07-23 | 2004-07-23 | 半導体装置の検査方法、その検査装置及びその検査に適した半導体装置 |
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US9184024B2 (en) * | 2010-02-05 | 2015-11-10 | Hermes-Microvision, Inc. | Selectable coulomb aperture in E-beam system |
WO2016149676A1 (en) * | 2015-03-18 | 2016-09-22 | Battelle Memorial Institute | Electron beam masks for compressive sensors |
US10170274B2 (en) | 2015-03-18 | 2019-01-01 | Battelle Memorial Institute | TEM phase contrast imaging with image plane phase grating |
WO2017189212A1 (en) | 2016-04-29 | 2017-11-02 | Battelle Memorial Institute | Compressive scanning spectroscopy |
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2004
- 2004-07-23 JP JP2006527713A patent/JP4567684B2/ja not_active Expired - Fee Related
- 2004-07-23 WO PCT/JP2004/010485 patent/WO2006011185A1/ja active Application Filing
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JPS61110954A (ja) * | 1984-11-06 | 1986-05-29 | Hitachi Ltd | 電子顕微鏡 |
JPH05217536A (ja) * | 1992-02-03 | 1993-08-27 | Hitachi Ltd | 電子顕微鏡の絞り装置 |
JPH06139988A (ja) * | 1992-10-23 | 1994-05-20 | Hitachi Ltd | 電子顕微鏡 |
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JP2003014667A (ja) * | 2001-07-05 | 2003-01-15 | Hitachi Ltd | 電子線を用いた観察装置及び観察方法 |
JP2004022318A (ja) * | 2002-06-17 | 2004-01-22 | Mitsubishi Electric Corp | 透過型電子顕微鏡装置および試料解析方法 |
Also Published As
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US7465923B2 (en) | 2008-12-16 |
JPWO2006011185A1 (ja) | 2008-05-01 |
US20070114410A1 (en) | 2007-05-24 |
JP4567684B2 (ja) | 2010-10-20 |
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