CN112857253A - Surface three-dimensional shape measuring device for large-size wafer - Google Patents
Surface three-dimensional shape measuring device for large-size wafer Download PDFInfo
- Publication number
- CN112857253A CN112857253A CN202110089853.7A CN202110089853A CN112857253A CN 112857253 A CN112857253 A CN 112857253A CN 202110089853 A CN202110089853 A CN 202110089853A CN 112857253 A CN112857253 A CN 112857253A
- Authority
- CN
- China
- Prior art keywords
- disposed
- light
- wafer
- assembly
- camera
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005259 measurement Methods 0.000 claims abstract description 32
- 230000003287 optical effect Effects 0.000 claims abstract description 23
- 239000013078 crystal Substances 0.000 claims abstract description 12
- CPBQJMYROZQQJC-UHFFFAOYSA-N helium neon Chemical compound [He].[Ne] CPBQJMYROZQQJC-UHFFFAOYSA-N 0.000 claims description 7
- 238000012876 topography Methods 0.000 claims description 4
- 235000008429 bread Nutrition 0.000 claims description 3
- 239000010409 thin film Substances 0.000 description 5
- 238000000691 measurement method Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
- G01B11/2441—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures using interferometry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
- G01N21/45—Refractivity; Phase-affecting properties, e.g. optical path length using interferometric methods; using Schlieren methods
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention provides a device for measuring the surface three-dimensional appearance of a large-size wafer, which comprises a base, a motion module and a support assembly, wherein the motion module and the support assembly are arranged on the base; wherein, the support group is provided with a flat crystal and a wafer to be tested; the optical measurement module comprises a support plate arranged on the motion module, a light-emitting component arranged on the support plate, a plano-convex lens component and a 90-degree off-axis parabolic mirror component which are sequentially arranged on an emergent light path of the light-emitting component, and a camera component for collecting interference fringe images formed by emergent light of the light-emitting component on the flat wafer and the wafer to be measured. The problem that the existing measuring system cannot meet the requirements of large-range measurement and high-precision measurement at the same time is solved.
Description
Technical Field
The invention relates to the field of optics, in particular to a device for measuring the surface three-dimensional appearance of a large-size wafer.
Background
In the prior art, a large-field measurement method and a high-resolution microscopic measurement method are provided for measuring the appearance of a wafer, however, for measuring the microscopic appearance of a large-size product with hundreds of millimeters, a single measurement mode cannot meet the requirements of both large size and high precision;
the data measured by the large-field measurement method is often low in resolution, and the local detail expression capability is limited; high-resolution microscopic measurement methods, such as confocal microscopes, digital holographic microscopes, white light interferometers, and the like, are limited in measurement range and cannot directly represent the overall three-dimensional surface morphology.
At present, the appearance measurement of a large-size wafer mainly adopts a large-stroke motion positioning system to carry a high-resolution measurement system, but measurement errors introduced by the motion system are not considered while the measurement range is expanded. If the motion error of a large stroke is taken into consideration of the system accuracy index, the system measurement accuracy needs to be further ensured by other high-reference structures such as an optical sensor, a displacement sensor, a laser interferometer and the like. The method realizes measurement with high precision in a large range, but has the problems that the system precision depends on the precision of the sensor, the structure is complex, and the system cost is high.
In view of this, the present application is presented.
Disclosure of Invention
The invention provides a surface three-dimensional shape measuring device for a large-size wafer, and aims to solve the problem that the existing measuring system cannot meet the requirements of large-range measurement and high-precision measurement at the same time.
The embodiment of the invention provides a device for measuring the surface three-dimensional appearance of a large-size wafer, which comprises a base, a motion module and a support assembly which are arranged on the base, and an optical measurement module arranged on the motion module;
wherein, the support group is provided with a flat crystal and a wafer to be tested;
the optical measurement module comprises a support plate arranged on the motion module, a light-emitting component arranged on the support plate, a plano-convex lens component and a 90-degree off-axis parabolic mirror component which are sequentially arranged on an emergent light path of the light-emitting component, and a camera component for collecting interference fringe images formed by emergent light of the light-emitting component on the flat wafer and the wafer to be measured.
Preferably, the light emitting assembly includes: a helium-neon laser source and a light source holder therefor;
wherein, the light source support configuration is in on the backup pad, helium neon laser source is fixed on the light source support.
Preferably, the bracket assembly comprises: the device comprises a plurality of adjustable supporting bases arranged on the base, supporting rods respectively arranged on the plurality of supporting bases, and a flat crystal supporting frame arranged on the supporting rods.
Preferably, the motion module comprises: the walking device comprises a first-direction walking assembly and a second-direction walking assembly arranged on the first-direction walking assembly, wherein the second-direction walking assembly can move along with the first-direction walking assembly.
Preferably, the first direction walking assembly comprises: the device comprises a first guide rail arranged on the base, a first servo motor arranged on the first guide rail, a first screw rod connected with an output shaft of the first servo motor, and a first sliding block sleeved on the first screw rod.
Preferably, the second direction walking assembly comprises a second guide rail configured on the first sliding block, a second servo motor configured on the second guide rail, a second lead screw connected with an output shaft of the second servo motor, and a second sliding block sleeved on the second lead screw, wherein the supporting plate is fixed on the second sliding block.
Preferably, the support plate is an optical bread plate.
Preferably, the plano-convex lens assembly comprises: a plano-convex lens and a first lens holder;
wherein the first lens holder is disposed on the support plate, and the plano-convex lens is disposed on the first lens holder.
Preferably, the 90 ° off-axis parabolic mirror assembly comprises: a 90 degree off-axis parabolic mirror and a second lens holder;
wherein the second lens holder is disposed on the support plate, and the 90 ° off-axis parabolic mirror is disposed on the second lens holder.
Preferably, the camera assembly comprises: a camera, and a camera mount;
wherein the camera mount is disposed on the support plate and the camera is disposed on the camera mount.
According to the surface three-dimensional shape measuring device of the large-size wafer, the motion module is arranged on the base, the optical measuring module is arranged on the motion module, so that the optical measuring module moves along with the motion module on a preset moving path, the light emitting component emits parallel light rays and enters the plano-convex lens component, the plano-convex lens component focuses the parallel light rays into a point light source, the point light source entering at a focus can be changed into collimated light rays with the diameter size equal to the diameter size of the mirror surface to be emitted after the collimated light rays are emitted to the 90-degree off-axis parabolic mirror, and the measured surface with the diameter size of the mirror surface is directly covered to generate interference. And acquiring interference fringe images of the flat crystal and the measured surface through a camera assembly, and further solving the height information of the measured surface through solving the phase to restore the three-dimensional morphology. By adopting the structure and the measuring method based on the thin film interference principle, the influence of the motion error introduced by a large-stroke motion system on the measuring result can be reduced while the wavelength-level measuring precision of monochromatic light is met, and the problem that in the prior art, the measuring system cannot simultaneously meet the requirements of large-range measurement and high-precision measurement is solved.
Drawings
FIG. 1 is a schematic view of a device for measuring a three-dimensional surface topography of a large-sized wafer according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a motion module and an optical measurement module according to an embodiment of the present invention;
FIG. 3 is an optical path diagram of an optical measurement module provided by an embodiment of the present invention;
FIG. 4 is a schematic view of a bracket assembly provided by an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following detailed description of specific embodiments of the invention refers to the accompanying drawings.
The invention discloses a surface three-dimensional shape measuring device for a large-size wafer, and aims to solve the problem that the existing measuring system cannot meet the requirements of large-range measurement and high-precision measurement at the same time.
Referring to fig. 1 and 2, an embodiment of the invention provides a device for measuring a three-dimensional surface topography of a large-sized wafer, which includes a base 1, a motion module 3 and a support assembly 4 disposed on the base 1, and an optical measurement module disposed on the motion module 3;
wherein, the flat crystal 5 and the wafer 6 to be tested are arranged on the bracket group;
the optical measurement module comprises a supporting plate 291 arranged on the motion module 3, a light emitting component arranged on the supporting plate 291, a plano-convex lens 24 component and a 90-degree off-axis parabolic mirror 25 component which are sequentially arranged on an emergent light path of the light emitting component, and a camera component for collecting interference fringe images formed by emergent light of the light emitting component on the flat crystal 5 and the wafer 6 to be measured.
In this embodiment, when facing a large-sized wafer, the movement module 3 drives the optical measurement module to move in a certain sequence, so that the carried optical measurement module collects interference fringe images of different areas to splice, and obtains a full-field interference fringe image, and a phase is obtained to further obtain the full-field topography of the surface of the wafer 6 to be measured.
Specifically, referring to fig. 2 and fig. 3, the parallel light emitted by the light emitting element is incident to the plano-convex lens 24 assembly, the plano-convex lens 24 assembly focuses the parallel light into a point light source and emits the point light to the 90 ° off-axis parabolic mirror 25 assembly, the 90 ° off-axis parabolic mirror 25 assembly changes the point light source incident at the focal point into collimated light with a diameter equivalent to the mirror surface diameter and emits the collimated light, according to the principle of thin film interference, two rows of light waves are reflected by the collimated light emitted by the 90 ° off-axis parabolic mirror 25 assembly on the lower surface (measured surface) of the measured wafer 6 and the upper surface (reference surface) of the flat crystal 5 to generate interference fringes by interference, and the optical path difference generated by the reflection of the incident light on two different surfaces of the measured surface and the reference surface is related to the change of the thickness of the thin film, that is, the change of the thickness of the thin film is caused by the change, and acquiring an interference fringe image through the camera assembly, and further solving the height information of the measured surface through solving the phase to restore the three-dimensional morphology. For a large-size wafer, the movement module 3 needs to move in a certain sequence, so that the carried measuring mechanism collects interference fringe images of different areas to be spliced, a full-field interference fringe image is obtained, and the phase is obtained, so that the full-field appearance of the surface of the wafer 6 to be measured is further obtained.
In this embodiment, the light emitting assembly includes: a helium-neon laser source 22 and a light source holder 21 therefor;
wherein the light source holder 21 is disposed on the support plate 291, and the helium-neon laser source 22 is fixed to the light source holder 21.
It should be noted that the he-ne laser source 22 is one of the most widely used lasers with the earliest operation time, the most mature technology, and is a gas laser, and gas atoms have a certain energy level structure, and are excited by external electrons to generate energy level transition, and generate excited radiation to emit laser, so that the he-ne laser wavelength is pure monochromatic light, the line width is extremely narrow, the wavelength error is only a few nanometers, and the he-ne laser has an extremely large coherence length. Some lasers that emit light by band transitions, such as LDs, are not comparable in monochromaticity and coherence. The atomic level structure is determined, and thus the laser is not affected by temperature fluctuation. The laser output has good collimation property due to the action of the resonant cavity, and the divergence angle is only a few milliradians. The helium-neon laser source 22 has incomparable advantages where good monochromatic light, coherence and collimation are required, particularly in the field of precision measurements.
In this embodiment, referring to fig. 4, the bracket assembly 4 includes: a plurality of adjustable support bases 43 disposed on the susceptor 1, support rods 42 disposed on the plurality of support bases, respectively, and a flat crystal support 41 disposed on the support rods 42.
It should be noted that, in this embodiment, 3 adjustable supporting bases 43 may be configured, and the supporting rods 42 are correspondingly configured, where the adjustable supporting bases 43 are used to adjust the supporting frame of the flat crystal 5, and in other embodiments, the number of the adjustable supporting bases 43 may be set according to actual situations, which is not specifically limited herein, but these schemes are within the protection scope of the present invention.
In this embodiment, the motion module 3 includes: a first direction running component 31 and a second direction running component 32 configured on the first direction running component 31, wherein the second direction running component 32 can move along with the first direction running component 31.
It should be noted that the first direction walking assembly 31 and the second direction walking assembly 32 are configured to drive the optical measurement module to move in a certain sequence, so that the carried optical measurement module collects interference fringe images of different areas to be spliced, so as to obtain a full-field interference fringe image.
In the present embodiment, the first direction walking assembly 31 includes: the device comprises a first guide rail arranged on the base 1, a first servo motor arranged on the first guide rail, a first screw rod connected with an output shaft of the first servo motor, and a first sliding block sleeved on the first screw rod.
It should be noted that an input end of the first servo motor may be connected to a controller, for example, a PLC controller, and is configured to receive a pulse signal output by the controller, and control rotation of the first servo motor to drive the first lead screw to rotate, so as to drive the first slider to move.
In this embodiment, the second direction moving assembly 32 includes a second guide rail disposed on the first slider, a second servo motor disposed on the second guide rail, a second lead screw connected to an output shaft of the second servo motor, and a second slider sleeved on the second lead screw, wherein the supporting plate 291 is fixed on the second slider.
It should be noted that an input end of the second servo motor may be connected to a controller, for example, a PLC controller, and configured to receive a pulse signal output by the controller, and control rotation of the second servo motor to drive the second lead screw to rotate, so as to drive the second slider and the support plate 291 fixed on the second slider to move. In other embodiments, the first direction walking assembly 31 and the second direction walking assembly 32 may also be formed by other devices, which are not specifically limited herein, but these solutions are all within the protection scope of the present invention.
In this embodiment, the supporting plate 291 may be an optical bread board.
It should be noted that, in other embodiments, the supporting plate 291 may be made of other materials, which is not specifically limited herein, but these solutions are all within the protection scope of the present invention.
In the present embodiment, the plano-convex lens 24 assembly includes: a plano-convex lens 24 and a first lens holder 23;
wherein the first lens holder 23 is disposed on the support plate 291, and the plano-convex lens 24 is disposed on the first lens holder 23.
It should be noted that the first lens holder 23 is used for fixing the plano-convex lens 24 in front of the light source, and at least partially receives the parallel light emitted from the light source.
In the present embodiment, the 90 ° off-axis parabolic mirror 25 assembly includes: a 90-degree off-axis parabolic mirror 25 and a second lens holder 26;
wherein the second lens holder 26 is disposed on the support plate 291, and the 90 ° off-axis parabolic mirror 25 is disposed on the second lens holder 26.
It should be noted that the second lens holder 26 is used to fix the 90 ° off-axis parabolic mirror 25 in front of the plano-convex lens 24, and at least partially receives the point light source emitted from the plano-convex lens 24.
In the present embodiment, the camera assembly includes: a camera 28, and a camera mount 29;
wherein the camera mount 29 is disposed on the support plate 291, and the camera is disposed on the camera mount 29.
It should be noted that the camera support 29 is used for fixing the camera 28, so that the camera 28 can capture an interference fringe image.
According to the surface three-dimensional shape measuring device of the large-size wafer, the motion module is arranged on the base, the optical measuring module is arranged on the motion module, so that the optical measuring module moves along with the motion module on a preset moving path, the light emitting component emits parallel light rays and enters the plano-convex lens component, the plano-convex lens component focuses the parallel light rays into a point light source, the point light source entering at a focus can be changed into collimated light rays with the diameter size equal to the diameter size of the mirror surface to be emitted after the collimated light rays are emitted to the 90-degree off-axis parabolic mirror, and the measured surface with the diameter size of the mirror surface is directly covered to generate interference. And acquiring interference fringe images of the flat crystal and the measured surface through a camera assembly, and further solving the height information of the measured surface through solving the phase to restore the three-dimensional morphology. By adopting the structure and the measuring method based on the thin film interference principle, the influence of the motion error introduced by a large-stroke motion system on the measuring result can be reduced while the wavelength-level measuring precision of monochromatic light is met, and the problem that in the prior art, the measuring system cannot simultaneously meet the requirements of large-range measurement and high-precision measurement is solved.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention.
Claims (10)
1. The device for measuring the surface three-dimensional topography of the large-size wafer is characterized by comprising a base, a motion module and a support assembly which are arranged on the base, and an optical measurement module arranged on the motion module;
wherein, the support group is provided with a flat crystal and a wafer to be tested;
the optical measurement module comprises a support plate arranged on the motion module, a light-emitting component arranged on the support plate, a plano-convex lens component and a 90-degree off-axis parabolic mirror component which are sequentially arranged on an emergent light path of the light-emitting component, and a camera component for collecting interference fringe images formed by emergent light of the light-emitting component on the flat wafer and the wafer to be measured.
2. The apparatus as claimed in claim 1, wherein the light-emitting device comprises: a helium-neon laser source and a light source holder therefor;
wherein, the light source support configuration is in on the backup pad, helium neon laser source is fixed on the light source support.
3. The apparatus as claimed in claim 1, wherein the support assembly comprises: the device comprises a plurality of adjustable supporting bases arranged on the base, supporting rods respectively arranged on the plurality of supporting bases, and a flat crystal supporting frame arranged on the supporting rods.
4. The apparatus as claimed in claim 1, wherein the motion module comprises: the walking device comprises a first-direction walking assembly and a second-direction walking assembly arranged on the first-direction walking assembly, wherein the second-direction walking assembly can move along with the first-direction walking assembly.
5. The apparatus as claimed in claim 4, wherein the first direction walking assembly comprises: the device comprises a first guide rail arranged on the base, a first servo motor arranged on the first guide rail, a first screw rod connected with an output shaft of the first servo motor, and a first sliding block sleeved on the first screw rod.
6. The apparatus as claimed in claim 5, wherein the second direction moving assembly comprises a second guide rail disposed on the first sliding block, a second servo motor disposed on the second guide rail, a second lead screw connected to an output shaft of the second servo motor, and a second sliding block disposed on the second lead screw, wherein the supporting plate is fixed on the second sliding block.
7. The apparatus as claimed in claim 1, wherein the supporting plate is an optical bread plate.
8. The apparatus as claimed in claim 1, wherein the plano-convex lens assembly comprises: a plano-convex lens and a first lens holder;
wherein the first lens holder is disposed on the support plate, and the plano-convex lens is disposed on the first lens holder.
9. The apparatus of claim 1, wherein the 90 ° off-axis parabolic mirror assembly comprises: a 90 degree off-axis parabolic mirror and a second lens holder;
wherein the second lens holder is disposed on the support plate, and the 90 ° off-axis parabolic mirror is disposed on the second lens holder.
10. The apparatus as claimed in claim 1, wherein the camera assembly comprises: a camera, and a camera mount;
wherein the camera mount is disposed on the support plate and the camera is disposed on the camera mount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110089853.7A CN112857253B (en) | 2021-01-22 | 2021-01-22 | Surface three-dimensional morphology measuring device of jumbo size wafer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110089853.7A CN112857253B (en) | 2021-01-22 | 2021-01-22 | Surface three-dimensional morphology measuring device of jumbo size wafer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112857253A true CN112857253A (en) | 2021-05-28 |
| CN112857253B CN112857253B (en) | 2024-07-23 |
Family
ID=76008036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110089853.7A Active CN112857253B (en) | 2021-01-22 | 2021-01-22 | Surface three-dimensional morphology measuring device of jumbo size wafer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112857253B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116255917A (en) * | 2023-02-23 | 2023-06-13 | 泰微科技(珠海)有限公司 | Wafer thickness measuring method and device |
| WO2024174944A1 (en) * | 2023-02-22 | 2024-08-29 | 无锡星微科技有限公司 | Measurement system and method for thickness and curvature of large-size wafer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108362221A (en) * | 2018-01-19 | 2018-08-03 | 北京理工大学 | A kind of free form surface pattern nano-precision detection method and device |
| US20200225115A1 (en) * | 2019-01-15 | 2020-07-16 | Guangdong University Of Technology | Device and method for measuring lens contour based on laser wave number scanning |
| CN111664802A (en) * | 2020-06-03 | 2020-09-15 | 中国科学院西安光学精密机械研究所 | Semiconductor wafer surface morphology measuring device based on dynamic quantitative phase imaging |
| CN214200005U (en) * | 2021-01-22 | 2021-09-14 | 华侨大学 | Surface three-dimensional shape measuring device for large-size wafer |
-
2021
- 2021-01-22 CN CN202110089853.7A patent/CN112857253B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108362221A (en) * | 2018-01-19 | 2018-08-03 | 北京理工大学 | A kind of free form surface pattern nano-precision detection method and device |
| US20200225115A1 (en) * | 2019-01-15 | 2020-07-16 | Guangdong University Of Technology | Device and method for measuring lens contour based on laser wave number scanning |
| CN111664802A (en) * | 2020-06-03 | 2020-09-15 | 中国科学院西安光学精密机械研究所 | Semiconductor wafer surface morphology measuring device based on dynamic quantitative phase imaging |
| CN214200005U (en) * | 2021-01-22 | 2021-09-14 | 华侨大学 | Surface three-dimensional shape measuring device for large-size wafer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024174944A1 (en) * | 2023-02-22 | 2024-08-29 | 无锡星微科技有限公司 | Measurement system and method for thickness and curvature of large-size wafer |
| CN116255917A (en) * | 2023-02-23 | 2023-06-13 | 泰微科技(珠海)有限公司 | Wafer thickness measuring method and device |
| CN116255917B (en) * | 2023-02-23 | 2023-08-29 | 泰微科技(珠海)有限公司 | Wafer thickness measuring method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112857253B (en) | 2024-07-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4216348B2 (en) | Interferometer system and lithographic apparatus including such a system | |
| US7599071B2 (en) | Determining positional error of an optical component using structured light patterns | |
| KR101264798B1 (en) | Position sensor and lithographic apparatus | |
| KR102469816B1 (en) | 3D reconstruction system and 3D reconstruction method | |
| TW201239547A (en) | Measuring method, measuring apparatus, lithographic apparatus and device manufacturing method | |
| JP2003534541A (en) | In-situ mirror characterization | |
| CN112857253B (en) | Surface three-dimensional morphology measuring device of jumbo size wafer | |
| TW200925789A (en) | Drive method and drive system for movably body | |
| CN104567719B (en) | A kind of high-space resolution long-range profile detection means and detection method | |
| SG187095A1 (en) | Projection system with metrology | |
| CN214200005U (en) | Surface three-dimensional shape measuring device for large-size wafer | |
| CN113483696A (en) | Large-size X-ray reflector interference splicing measurement system and method | |
| JP2010243241A (en) | Instrument and method for measuring refractive index | |
| CN110307805B (en) | White light interference system for measuring surface three-dimensional morphology | |
| JP7458666B2 (en) | Vertical laser pointing correction device and method using wavefront homodyne interference | |
| JP2014029276A (en) | Encoder device, optical device and exposure device | |
| CN112731345B (en) | Vibration-resistant type area array sweep frequency distance measurement/thickness measurement device and method with active optical anti-shake function | |
| CN115628816A (en) | Calibration system and method of laser parameter measuring device | |
| JP2017083510A (en) | Encoder device and use method thereof, optical device, exposure device and device manufacturing method | |
| CN112099121B (en) | Scanning interference photoetching system based on 4f system | |
| CN104266583A (en) | Multi-degree-of-freedom measuring system | |
| RU175219U1 (en) | LASER IMAGE GENERATOR FOR WORK IN THE POLAR COORDINATE SYSTEM | |
| CN217110835U (en) | Morphology measuring device and system for realizing height error separation | |
| CN219957864U (en) | Laser tracker calibration device | |
| RU2502952C1 (en) | Apparatus for nanometer accuracy linear displacements in wide range of possible displacements |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |