WO2013118296A1 - 太陽電池セルの検査装置および太陽電池セルの処理装置 - Google Patents
太陽電池セルの検査装置および太陽電池セルの処理装置 Download PDFInfo
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- WO2013118296A1 WO2013118296A1 PCT/JP2012/053128 JP2012053128W WO2013118296A1 WO 2013118296 A1 WO2013118296 A1 WO 2013118296A1 JP 2012053128 W JP2012053128 W JP 2012053128W WO 2013118296 A1 WO2013118296 A1 WO 2013118296A1
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- Prior art keywords
- antireflection film
- visible light
- cell
- reflected
- solar
- Prior art date
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- 238000007689 inspection Methods 0.000 title claims abstract description 76
- 238000012545 processing Methods 0.000 title claims description 25
- 230000005540 biological transmission Effects 0.000 claims description 28
- 230000032258 transport Effects 0.000 claims description 28
- 230000001678 irradiating effect Effects 0.000 claims description 16
- 230000007246 mechanism Effects 0.000 claims description 12
- 230000007723 transport mechanism Effects 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 abstract description 52
- 239000000463 material Substances 0.000 description 17
- 238000010586 diagram Methods 0.000 description 14
- 230000015572 biosynthetic process Effects 0.000 description 12
- 230000007547 defect Effects 0.000 description 12
- 238000005259 measurement Methods 0.000 description 10
- 238000009792 diffusion process Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000004065 semiconductor Substances 0.000 description 7
- 239000000758 substrate Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000012546 transfer Methods 0.000 description 4
- 230000002950 deficient Effects 0.000 description 3
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8803—Visual inspection
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8806—Specially adapted optical and illumination features
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/9501—Semiconductor wafers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/9501—Semiconductor wafers
- G01N21/9505—Wafer internal defects, e.g. microcracks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
- H02S50/10—Testing of PV devices, e.g. of PV modules or single PV cells
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/892—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the flaw, defect or object feature examined
- G01N21/894—Pinholes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/02—Mechanical
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/04—Batch operation; multisample devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/06—Illumination; Optics
- G01N2201/061—Sources
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Definitions
- the present invention relates to a solar cell inspection device on which an antireflection film is formed, and a solar cell processing device using the solar cell inspection device.
- Patent Document 1 laser light is emitted to a semiconductor wafer by a laser light source, an optical image reflected on the surface of the semiconductor wafer is picked up by an image pickup device, and image data of the semiconductor wafer picked up by a defect detection unit is used.
- a defect inspection apparatus that inspects defects existing on the surface of a semiconductor wafer by extracting defects is disclosed.
- Patent Document 2 discloses an infrared inspection apparatus that irradiates a semiconductor wafer with infrared rays from an infrared light source and picks up infrared rays transmitted through the semiconductor wafer with an infrared camera.
- This infrared inspection apparatus is configured to detect minute cracks inside a semiconductor wafer by utilizing the fact that infrared transmission states are different between an abnormal portion such as a crack and a polycrystalline silicon substrate portion.
- the film formation state is inspected after the antireflection film is formed. And the printing and baking of an electrode are performed with respect to the photovoltaic cell judged to be non-defective by the test
- the antireflection film for example, a SiN (silicon nitride) film formed by a film forming apparatus such as a plasma CVD apparatus using vacuum is used.
- a film forming apparatus such as a plasma CVD apparatus using vacuum is used.
- the process of evacuation, gas introduction, film formation, and venting is repeatedly executed inside the vacuum chamber, so that particles are deposited on the solar cell before film formation or on the solar cell after film formation. The probability of doing increases.
- a solar battery cell after forming an antireflection film detects an overlying particle or a pinhole as a point defect by measuring a reflected image by visible light in an appearance inspection apparatus, as in the above-mentioned Patent Document 1. is doing.
- the solar battery cell is recognized as a defective product and is excluded from the production line.
- pinholes are difficult to repair because they are not film-forming components.
- the overlying particles are removed from the antireflection film so that the solar cells are normal products. Can be used as When such a photovoltaic cell is excluded from the production line as a defective product, there arises a problem that the production efficiency is lowered.
- This invention was made in order to solve the said subject, and provides the inspection apparatus of a photovoltaic cell and the processing apparatus of a photovoltaic cell which can improve production efficiency by identifying a foreign material and a pinhole.
- the purpose is to do.
- the invention according to claim 1 is a solar cell inspection device for inspecting a solar cell on which an antireflection film is formed, and visible light that radiates visible light from the antireflection film side of the solar cell.
- a comparison unit that compares the image with the transmission image measured by the transmission image measurement unit; and a region that is a dark spot in the transmission image among regions that are bright points in the reflection image.
- the antireflection film is determined to be a region including foreign matter existing on the antireflection film, and a region other than the region determined to include the foreign matter among regions that are bright points in the reflection image is determined. And determining means for determining that the region includes a pinhole formed on the surface.
- the invention according to claim 2 is the invention according to claim 1, wherein the visible light irradiation means and the infrared light irradiation means irradiate both sides of the solar cell with visible light and infrared light simultaneously. And visible light reflected by the antireflection film of the solar battery cell and infrared light transmitted through the solar battery cell, and the reflected light measuring means reflects the visible light reflected by the antireflection film of the solar battery cell. And a beam splitter for guiding the infrared light transmitted through the solar battery cell to the transmitted image measuring means.
- the invention according to claim 3 is a solar cell processing apparatus for processing a solar battery cell on which an antireflection film is formed, and visible light is irradiated from the antireflection film side of the solar battery.
- a comparison unit that compares the image with the transmission image measured by the transmission image measurement unit; and a region that is a dark spot in the transmission image among regions that are bright points in the reflection image.
- the antireflection film is determined to be a region including foreign matter existing on the antireflection film, and a region other than the region determined to include the foreign matter among regions that are bright points in the reflection image is determined.
- a determination unit that determines that the region includes a pinhole formed in the region, and a region that is determined to be a region that includes foreign matter existing on the antireflection film by the determination unit of the inspection device.
- a foreign matter removing device for removing foreign matter in the region is provided.
- the foreign matter removing device is a region that is determined to be a region including foreign matter present on the antireflection film by the judging means in the inspection device.
- a foreign matter removing unit that removes foreign matter by ejecting or sucking gas is provided.
- the said foreign material removal apparatus inspects the photovoltaic cell after the foreign material was removed by the said foreign material removal part, in the said photovoltaic cell A second inspection device for inspecting the presence or absence of the antireflection film-like foreign matter is provided.
- the main transport path for transporting the solar cells to the region including the inspection device, and the determination means in the inspection device may be provided on the antireflection film.
- a transport mechanism that transports the solar battery cell determined to have a region containing foreign matter between the main transport path and the foreign matter removing device.
- the invention according to claim 7 is the solar cell according to the invention according to claim 6, wherein the solar battery cell determined by the determination means in the inspection apparatus that there is a region including a pinhole formed in the antireflection film, A discharge mechanism for discharging from the main transport path is provided.
- the solar cell which can be used can be recognized by removing a foreign material, and it becomes possible to improve the productivity of a photovoltaic cell.
- the beam splitter that guides the visible light reflected by the antireflection film of the solar battery cell to the reflected image measuring means and guides the infrared light transmitted through the solar battery cell to the transmitted image measuring means.
- the photovoltaic cell which can be used can be recognized by removing a foreign material. And it becomes possible to improve the productivity of a photovoltaic cell by removing a foreign material with a foreign material removal apparatus.
- the fourth aspect of the present invention it is possible to easily remove the foreign matter by ejecting or sucking the gas to the region determined to be the region containing the foreign matter.
- the fifth aspect of the present invention it is possible to confirm the removed state of the foreign matter by re-inspecting the solar battery cell after the foreign matter removing operation is performed by the foreign matter removing unit by the second inspection device. It becomes possible.
- the seventh aspect of the present invention it is possible to discharge, from the main transport path, the outside of the production line, the hard-to-repair solar cells that are determined to have a region including pinholes formed in the antireflection film. It becomes possible.
- FIG. 1 is a schematic diagram of an inspection apparatus 1.
- FIG. 4 is a plan view showing the arrangement of a plurality of light sources 11 supported by a support portion 18.
- FIG. 2 is a block diagram showing a main control system of the inspection apparatus 1.
- FIG. 2 is a schematic diagram of the 2nd inspection device. It is explanatory drawing which shows the peak P1 of the reflected image of visible light when the particle
- FIG. 4 is a plan view showing the arrangement of a plurality of light sources 11 supported by a support portion 18.
- FIG. 2 is a block diagram showing a main control system of the inspection apparatus 1.
- FIG. It is a schematic diagram of the 2nd inspection device. It is explanatory drawing which shows the peak P1 of the reflected image of visible light when the particle
- FIG. It is explanatory drawing which shows the peak P2 of the reflected image of visible light when the pinhole 103 exists on the photovoltaic cell 100.
- FIG. It is explanatory drawing which shows the peak P3 of the permeation
- FIG. It is explanatory drawing which shows the peak P4 of the transmitted image of infrared light when the pinhole 103 exists on the photovoltaic cell 100.
- FIG. It is a schematic diagram of the inspection apparatus 1 which concerns on other embodiment. It is a schematic diagram of the inspection apparatus 1 which concerns on other embodiment.
- FIG. 1 is a perspective view of a processing apparatus for a solar battery cell 100 according to the present invention.
- FIG. 2 is a plan view of the solar cell 100 processing apparatus according to the present invention, with the inspection apparatus 1 and the second inspection apparatus 2 removed.
- the processing apparatus for solar battery cell 100 is for processing solar battery cell 100 having an antireflection film formed on the upper surface thereof in the previous film formation step.
- a transport device 3 that constitutes a main transport path for transporting to an area including the inspection apparatus 1 with the antireflection film facing upward is provided.
- the processing apparatus of the photovoltaic cell 100 which concerns on this invention is the 2nd test
- the apparatus 2 the discharge mechanism 5 for discharging the solar battery cell 100 in which the pinhole is formed in the antireflection film, and the solar battery cell 100 in which the pinhole is formed in the antireflection film are connected to the main transport path. And a transport mechanism 6 for transporting the solar cell 100 from which particles have been removed in the foreign material removal apparatus 4 to the main transport path.
- the transport device 3 includes four pulleys 31 around which a pair of transport belts 32 are wound, and a motor (not shown) that rotationally drives the pulleys 31.
- the foreign matter removing device 4 includes a foreign matter removing unit 41 that removes particles by ejecting or sucking gas to an area including the particles in the antireflection film of the solar battery cell 100.
- the foreign matter removing unit 41 is supported so as to be movable with respect to the support member 42, and reciprocates in a direction orthogonal to the transport direction of the solar battery cell 100 by the transport device 3. Further, the support member 42 itself reciprocates in a direction parallel to the transport direction of the solar battery cell 100 by the transport device 3.
- FIG. 3 is a schematic diagram of the inspection apparatus 1.
- FIG. 4 is a plan view showing the arrangement of the plurality of light sources 11 supported by the support portion 18. In FIG. 4, the opening 17 of the reflective diffusion plate 12 is shown by a solid line.
- the inspection apparatus 1 includes a plurality of visible light sources 11 that emit visible light having a wavelength of about 640 nm supported by the support unit 18, and the visible light emitted from the visible light sources 11 to reflect the visible light.
- a visible light irradiating unit is provided that includes a dome-shaped reflective diffusion plate 12 connected to a support unit 18 for irradiating the upper surface. Visible light emitted from the visible light source 11 is reflected by the reflective diffusion plate 12 and is applied to the solar battery cell 100 from the antireflection film side.
- the wavelength of the visible light is determined based on the film thickness and the refractive index of the antireflection film so that the reflectance of visible light in the antireflection film becomes small.
- the inspection apparatus 1 further includes an infrared light source 13 as an infrared light irradiation unit that emits infrared light having a wavelength of about 940 nm.
- the infrared light emitted from the infrared light source 13 is applied to the solar battery cell 100 from the side opposite to the antireflection film.
- the wavelength of the infrared light is determined based on the material of the solar battery cell 100 or the like so that the infrared light can be easily transmitted through the solar battery cell 100.
- the inspection apparatus 1 includes a plate-shaped beam splitter 14, a CCD camera 15 as a reflection image measurement unit, and a CCD camera 16 as a transmission image measurement unit.
- the beam splitter 14 is disposed at a position where the visible light reflected by the antireflection film of the solar battery cell 100 and the infrared light transmitted through the solar battery cell 100 can be received.
- the beam splitter 14 has a configuration that reflects visible light and transmits infrared light. Visible light emitted from the visible light irradiating unit including the visible light source 11 is reflected by the antireflection film in the solar battery cell 100, passes through the rectangular opening 17 in the reflective diffusion plate 12, and then the beam splitter 14. And is incident on the CCD camera 15.
- the infrared light emitted from the infrared light source 13 passes through the solar battery cell 100, passes through the beam splitter 14, and enters the CCD camera 16.
- FIG. 5 is a block diagram showing the main control system of the inspection apparatus 1.
- the inspection apparatus 1 includes a CPU that executes logical operations, a ROM that stores an operation program necessary for controlling the apparatus, and a RAM that temporarily stores data and the like during control.
- the control part 7 to control is provided.
- the control unit 7 is connected to the above-described visible light source 11, infrared light source 13, CCD camera 15, and CCD camera 16. Further, as will be described later, the control unit 7 includes a comparison unit 71 that compares a reflected image by visible light and a transmitted image by infrared light, and a determination unit 72 for determining particles and pinholes.
- FIG. 6 is a schematic diagram of the second inspection apparatus 2.
- the second inspection apparatus 2 is irradiated with a plurality of visible light sources 21 that emit visible light having a wavelength of about 640 nm supported by the support portion 28, and the visible light source 21.
- a visible light irradiating unit including a dome-shaped reflective diffusion plate 22 connected to a support unit 28 for reflecting visible light and irradiating the upper surface of the solar battery cell 100 is provided. Visible light emitted from the visible light source 21 is reflected by the reflective diffusion plate 22 and is applied to the solar battery cell 100 from the antireflection film side.
- the second inspection apparatus 2 includes a CCD camera 26 as a reflected image measuring unit. Visible light emitted from a visible light irradiating unit including the visible light source 21 is reflected by an antireflection film in the solar battery cell 100, and then passes through a rectangular opening 27 in the reflective diffusion plate 22 to be CCD camera. 26 is incident.
- solar battery cell 100 on which the antireflection film has been formed in the previous film formation process is transported by transport device 3 that constitutes the main transport path. .
- the solar battery cell 100 is transported to a position below the inspection apparatus 1, and at this position, the inspection apparatus 1 is inspected for the presence of particles and pinholes on the surface thereof as described later.
- the solar battery cell 100 determined to have no particles or pinholes is transported by the transport device 3 and sent to the subsequent processing step as it is. Further, as a result of the inspection by the inspection device 1, the solar battery cell 100 determined to have a pinhole is discharged from the transfer device 3 constituting the main transfer path by the discharge mechanism 5.
- the discharge mechanism 5 serves to suck and hold the solar battery cell 100 and discharge it from the transport device 3 to an external discharge unit. The solar cells 100 discharged to the discharge unit are reused after removing the antireflection film including pinholes.
- the solar battery cell 100 determined to have particles is carried out from the transport device 3 constituting the main transport path to the foreign matter removing device 4 by the transport mechanism 6.
- the conveyance mechanism 6 is for holding the solar battery cell 100 by suction and carrying it out from the conveyance device 3 to the foreign material removal device 4 or carrying it from the foreign material removal device 4 into the conveyance device 3.
- the foreign matter removing portion 41 is moved based on the determination result by the inspection device 1, and particles are ejected or sucked into the region including the particles in the antireflection film of the solar battery cell 100. Remove.
- the solar battery cell 100 from which particles have been removed by the foreign matter removing device 4 is inspected again by the second inspection device 2 for the presence or absence of particles, as will be described later. Then, the substrate determined to have the particles removed by the second inspection apparatus 2 is carried into the conveyance apparatus 3 from the foreign substance removal apparatus 4 by the conveyance mechanism 6.
- the visible light emitted from the visible light irradiation unit including the visible light source 11 is reflected on the solar battery cell 100 with respect to the solar battery cell 100 transported to the inspection device 1 by the transport device 3.
- the protective film is irradiated.
- the visible light is reflected by the antireflection film, then further reflected by the beam splitter 14, and enters the CCD camera 15.
- the reflected image of visible light measured by the CCD camera 15 is sent to the control unit 7 shown in FIG.
- the solar cell 100 is irradiated with infrared light emitted from the infrared light source 13 at the same time.
- the infrared light passes through the solar battery cell 100, passes through the beam splitter 14, and enters the CCD camera 16.
- the transmission image measured by the CCD camera 16 is sent to the control unit 7 shown in FIG. Then, the comparison unit 71 in the control unit 7 compares the reflection image measured by the CCD camera 15 and the transmission image measured by the CCD camera 16.
- FIG. 7 is an explanatory diagram showing the peak P1 of the reflected image of visible light when the particles 104 are present on the solar battery cell 100.
- FIG. 8 is an explanatory diagram showing the peak P2 of the reflected image of visible light when the pinhole 103 is present on the solar battery cell 100.
- FIG. 9 is an explanatory diagram showing a peak P3 of a transmission image of infrared light when the particles 104 are present on the solar battery cell 100.
- FIG. FIG. 10 is an explanatory diagram showing a peak P4 of the transmitted image of infrared light when the pinhole 103 is present on the solar battery cell 100.
- FIG. In these drawings the antireflection film 101 and the polycrystalline substrate 102 constituting the solar battery cell 100 are schematically shown.
- the infrared light transmitted through the solar cell 100 has a higher transmittance in the pinhole 103 portion than in the antireflection film 101 portion. Therefore, in the transmission image measured by the CCD camera 16, as shown in FIG. 10, a small peak P4 with high luminance indicating the pinhole 103 is recognized as a bright point.
- the peak P4 becomes extremely small and may not be recognized as a bright point.
- the defect existing on the solar battery cell 100 is the pinhole 103 using the result of the comparison by the comparison unit 71 between the reflection image measured by the CCD camera 15 and the transmission image measured by the CCD camera 16.
- Whether the particle 104 is present can be recognized. That is, it is possible to recognize that the area that is a bright spot in the reflected image measured by the CCD camera 15 is an area having some defect.
- the regions that are bright spots in the reflection image measured by the CCD camera 15 are regions including the particles 104 that exist on the antireflection film 101.
- the pinhole 103 and the particle 104 existing on the antireflection film 101 can be identified.
- the photovoltaic cell 100 determined that the pinhole 103 is formed is discharged to the discharge part by the discharge mechanism 5.
- the solar battery cell 100 determined that the particle 104 exists is carried out to the foreign matter removing device 4 by the transport mechanism 6.
- the solar cell 100 which can be used can be recognized by removing a particle in the foreign material removal apparatus 4, and the productivity of the solar cell 100 can be improved.
- the visible light emitted from the visible light irradiation unit including the visible light source 21 is received in the solar battery cell 100 with respect to the solar battery cell 100 transported to the foreign matter removing device 4 by the transport mechanism 6.
- the antireflection film 101 is irradiated.
- the visible light is reflected by the antireflection film 101 and then enters the CCD camera 26.
- the visible light irradiated on the solar battery cell 100 is hardly reflected by the antireflection film 101.
- the visible light irradiated to the particle 104 is reflected by the surface of the particle 104.
- a high-luminance peak P1 indicating the particle 104 is recognized as a bright point. For this reason, it is possible to determine the presence or absence of the particle 104 based on the presence or absence of this bright point.
- the solar battery cell 100 determined that the particle 104 is present is again subjected to the operation of removing the particle 104 using the foreign matter removing device 4.
- the solar battery cell 100 determined to have no particles is carried into the transfer device 3 by the transfer mechanism 6.
- the pinhole 103 is shown in the reflection image measured by the CCD camera 26. There is no bright spot.
- the particle 104 is detected from the reflected image, but as in the case shown in FIG. 9, the particle 104 is detected using the transmission image. May be.
- FIG. 11 is a schematic diagram of an inspection apparatus 1 according to another embodiment.
- symbol is attached
- a pair of belts 35 that are wound around pulleys 34 to move are provided, and between these belts 35, a long length that extends in a direction orthogonal to the transport direction of solar cells 100 transported by belt 35.
- Infrared light source 19 is provided.
- the solar battery cell 100 is irradiated with infrared light using the region between the pair of belts 35 while the solar battery cell 100 is conveyed by the pair of belts 35. Infrared fluoroscopic images over the entire area can be obtained.
- FIG. 12 is a schematic diagram of an inspection apparatus 1 according to still another embodiment.
- symbol is attached
- the beam splitter 14 and the CCD camera 15 in the first embodiment shown in FIG. 3 are omitted, and a reflected image by visible light and a transmitted image by infrared light are acquired by a single CCD camera 16.
- It has a configuration.
- it is possible to capture a reflected image by visible light and a transmitted image by infrared rays at the same time, and even if particles on the solar battery cell 100 move in time, Is not mistakenly identified as a pinhole.
- a single CCD camera 16 acquires a reflected image by visible light and a transmitted image by infrared light, and is an inexpensive system with few component parts. It is.
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Abstract
Description
2 第2の検査装置
3 搬送装置
4 異物除去装置
5 排出機構
6 搬送機構
7 制御部
11 可視光源
12 反射型拡散板
13 赤外光源
14 ビームスプリッタ
15 CCDカメラ
16 CCDカメラ
17 開口部
18 支持部
21 可視光源
22 反射型拡散板
26 CCDカメラ
27 開口部
28 支持部
31 プーリ
32 ベルト
34 プーリ
35 ベルト
41 異物除去部
42 支持部材
71 比較部
72 判定部
100 太陽電池セル
101 反射防止膜
102 多結晶基板
103 ピンホール
104 パーティクル
Claims (7)
- 反射防止膜が成膜された太陽電池セルを検査する太陽電池セルの検査装置であって、
前記太陽電池セルにおける前記反射防止膜側から可視光を照射する可視光照射手段と、
前記可視光照射手段から照射され、前記太陽電池セルの反射防止膜において反射した反射画像を測定する反射画像測定手段と、
前記太陽電池セルにおける前記反射防止膜とは逆側から赤外光を照射する赤外光照射手段と、
前記赤外光照射手段から照射され、前記太陽電池セルを透過した透過画像を測定する透過画像測定手段と、
前記反射画像測定手段により測定した反射画像と前記透過画像測定手段により測定した透過画像とを比較する比較手段と、
前記反射画像において明点となった領域のうち、前記透過画像において暗点となった領域を前記反射防止膜上に存在する異物を含む領域であると判定するとともに、前記反射画像において明点となった領域のうち、前記異物を含む領域と判定された領域以外の領域を前記反射防止膜に形成されたピンホールを含む領域であると判定する判定手段と、
を備えたことを特徴とする太陽電池セルの検査装置。 - 請求項1に記載の太陽電池セルの検査装置において、
前記可視光照射手段と前記赤外光照射手段とは、太陽電池セルの両面に同時に可視光と赤外光とを照射するとともに、
前記太陽電池セルの反射防止膜で反射した可視光と前記太陽電池セルを透過した赤外光とを受光し、前記太陽電池セルの反射防止膜で反射した可視光を前記反射画像測定手段に導くとともに、前記太陽電池セルを透過した赤外光を前記透過画像測定手段に導くビームスプリッタを備える太陽電池セルの検査装置。 - 反射防止膜が成膜された太陽電池セルを処理する太陽電池セルの処理装置であって、
前記太陽電池セルにおける前記反射防止膜側から可視光を照射する可視光照射手段と、
前記可視光照射手段から照射され、前記太陽電池セルの反射防止膜において反射した反射画像を測定する反射画像測定手段と、
前記太陽電池セルにおける前記反射防止膜とは逆側から赤外光を照射する赤外光照射手段と、
前記赤外光照射手段から照射され、前記太陽電池セルを透過した透過画像を測定する透過画像測定手段と、
前記反射画像測定手段により測定した反射画像と前記透過画像測定手段により測定した透過画像とを比較する比較手段と、
前記反射画像において明点となった領域のうち、前記透過画像において暗点となった領域を前記反射防止膜上に存在する異物を含む領域であると判定するとともに、前記反射画像において明点となった領域のうち、前記異物を含む領域と判定された領域以外の領域を前記反射防止膜に形成されたピンホールを含む領域であると判定する判定手段と、を有する検査装置と、
前記検査装置の判定手段により前記反射防止膜上に存在する異物を含む領域であると判定された領域に対して、その領域の異物を除去する異物除去装置と、
を備えたことを特徴とする太陽電池セルの処理装置。 - 請求項3に記載の太陽電池セルの処理装置において、
前記異物除去装置は、前記検査装置における判定手段により前記反射防止膜上に存在する異物を含む領域であると判定された領域に対して、気体を噴出または吸引することにより異物を除去する異物除去部を備える太陽電池セルの処理装置。 - 請求項4に記載の太陽電池セルの処理装置において、
前記異物除去装置は、前記異物除去部により異物を除去された後の太陽電池セルを検査することにより、当該太陽電池セルにおける反射防止膜状の異物の有無を検査する第2の検査装置を備える太陽電池セルの処理装置。 - 請求項5に記載の太陽電池セルの処理装置において、
前記検査装置を含む領域に対して太陽電池セルを搬送する主搬送路と、前記検査装置における判定手段により前記反射防止膜上に異物を含む領域が存在すると判定された太陽電池セルを、前記主搬送路と前記異物除去装置との間で搬送する搬送機構と、を備える太陽電池セルの処理装置。 - 請求項6に記載の太陽電池セルの処理装置において、
前記検査装置における判定手段により前記反射防止膜に形成されたピンホールを含む領域が存在すると判定された太陽電池セルを、前記主搬送路から排出する排出機構を備える太陽電池セルの処理装置。
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