WO2021193297A1 - 原盤の製造方法、原盤、転写物および物品 - Google Patents
原盤の製造方法、原盤、転写物および物品 Download PDFInfo
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- WO2021193297A1 WO2021193297A1 PCT/JP2021/010894 JP2021010894W WO2021193297A1 WO 2021193297 A1 WO2021193297 A1 WO 2021193297A1 JP 2021010894 W JP2021010894 W JP 2021010894W WO 2021193297 A1 WO2021193297 A1 WO 2021193297A1
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- Prior art keywords
- base material
- master
- main
- resist layer
- convex structure
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Classifications
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- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/0042—Photosensitive materials with inorganic or organometallic light-sensitive compounds not otherwise provided for, e.g. inorganic resists
- G03F7/0043—Chalcogenides; Silicon, germanium, arsenic or derivatives thereof; Metals, oxides or alloys thereof
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- B81C99/00—Subject matter not provided for in other groups of this subclass
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- B81C99/009—Manufacturing the stamps or the moulds
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
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- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/42—Moulds or cores; Details thereof or accessories therefor characterised by the shape of the moulding surface, e.g. ribs or grooves
- B29C33/424—Moulding surfaces provided with means for marking or patterning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
- B29C59/04—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts
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- B81C99/00—Subject matter not provided for in other groups of this subclass
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- B81C99/0085—Manufacture of substrate-free structures using moulds and master templates, e.g. for hot-embossing
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- G—PHYSICS
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- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
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- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
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- G—PHYSICS
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- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
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- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
- B29C2035/0827—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using UV radiation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
- B29C59/04—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts
- B29C59/046—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts for layered or coated substantially flat surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
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- B81B2201/00—Specific applications of microelectromechanical systems
- B81B2201/06—Bio-MEMS
Definitions
- the present invention relates to a master manufacturing method, a master, a transcript, and an article.
- Patent Documents 1 and 2 describe a technique of forming an etching mask on a base material by lithography and etching the base material on which the etching mask is formed to form a concavo-convex structure having a predetermined pattern on the base material. Is described.
- An object of the present invention made in view of the above problems is to provide a method for manufacturing a master, a master, a transfer product, and an article, which are formed by superimposing uneven structures having different average pitches.
- the method for manufacturing a master includes a first forming step of forming a fine concavo-convex structure having a first average pitch on one surface of a base material, and one surface of the base material on which the fine concavo-convex structure is formed. , A step of forming a main concave portion or a main convex portion having a second average pitch larger than the first average pitch, and the shape of at least a part of the fine concave-convex structure in the main concave portion or the main convex portion.
- the present invention includes a second forming step of forming the main concave portion or the main convex portion while maintaining the above.
- the master according to the embodiment includes a base material having a main concave portion or a main convex portion formed on one surface and a fine concave-convex structure formed on the main concave portion or the main convex portion, and the fine concave-convex structure is the first. It is formed at an average pitch, and the main concave portion or the main convex portion is formed at a second average pitch that is larger than the first average pitch.
- the transferred product according to the embodiment is transferred with the shape of the concave-convex structure formed on one surface of the base material of the master or the inverted shape of the concave-convex structure.
- the article according to the embodiment includes the above-mentioned transcript.
- FIG. 2 is a cross-sectional view (No.
- FIG. 3 is a cross-sectional view (No. 3) showing a method of manufacturing a master according to Comparative Example 1. It is sectional drawing (the 4) which shows the manufacturing method of the master which concerns on Comparative Example 1. It is sectional drawing (the 1) which shows the manufacturing method of the master which concerns on Comparative Example 2.
- FIG. 2 is a cross-sectional view (No. 2) showing a method of manufacturing a master according to Comparative Example 2.
- FIG. 3 is a cross-sectional view (No. 3) showing a method of manufacturing a master according to Comparative Example 2. It is sectional drawing (the 4) which shows the manufacturing method of the master which concerns on Comparative Example 2.
- FIG. 3 is a cross-sectional view (No. 3) showing an example of a method for manufacturing a master according to an embodiment of the present invention. It is sectional drawing (the 4) which shows an example of the manufacturing method of the master which concerns on one Embodiment of this invention.
- FIG. 5 is a cross-sectional view (No. 5) showing an example of a method for manufacturing a master according to an embodiment of the present invention.
- FIG. 6 is a cross-sectional view (No.
- FIG. 6 showing an example of a method for manufacturing a master according to an embodiment of the present invention.
- sectional drawing (7) which shows an example of the manufacturing method of the master which concerns on one Embodiment of this invention.
- sectional drawing (8) which shows an example of the manufacturing method of the master which concerns on one Embodiment of this invention.
- sectional drawing (the 1) which shows the other example of the manufacturing method of the master which concerns on one Embodiment of this invention.
- the 2 which shows the other example of the manufacturing method of the master which concerns on one Embodiment of this invention.
- sectional drawing (the 3) which shows the other example of the manufacturing method of the master which concerns on one Embodiment of this invention.
- FIG. 5 is an SEM image diagram of an image of a transcript obtained by the master according to the first embodiment.
- FIG. 3 is an SEM image diagram of an image of a transcript obtained by the master according to the second embodiment. It is an SEM image figure which imaged the transfer
- FIG. 1 is a diagram showing the appearance of the master 1 according to the embodiment of the present invention.
- the master 1 is composed of, for example, a cylindrical base material 10 having a concavo-convex structure 20 formed on an outer peripheral surface 11 which is one surface.
- Master 1 is, for example, a master used in roll-to-roll imprint technology.
- the outer peripheral surface 11 of the master 1 is pressed against a sheet-like base material or the like while rotating the master 1, so that the concave-convex structure 20 formed on the outer peripheral surface 11 of the master 1 is sheeted. It can be transferred to a state substrate or the like. According to such an imprint technique, it is possible to efficiently produce a transferred product to which the uneven structure 20 formed on the outer peripheral surface 11 of the master 1 is transferred.
- the transferred product to which the concave-convex structure 20 is transferred can be used for various purposes.
- the transferred product to which the concave-convex structure 20 is transferred can be used for articles such as a light guide plate, a light diffusing plate, a microlens array, an antireflection film, or a cell culture sheet.
- the base material 10 is, for example, a cylindrical or cylindrical member. As shown in FIG. 1, the shape of the base material 10 may be a hollow cylindrical shape having a cavity inside. The shape of the base material 10 may be a solid cylindrical shape having no internal cavity. The base material 10 may be a flat plate-shaped member. The base material 10 may be formed of a glass material containing SiO 2 as a main component, such as fused silica glass or synthetic quartz glass. The base material 10 may be made of a metal such as stainless steel. The outer peripheral surface 11 of the base material 10 may be covered with SiO 2 or the like. Hereinafter, the base material 10 will be described as being a cylindrical or cylindrical member.
- the base material 10 is made of a glass material containing SiO 2 as a main component. It is more preferable that the base material 10 is entirely made of a glass material containing SiO 2 as a main component.
- the base material 10 can be easily processed by etching with a fluorine compound.
- the uneven structure 20 can be easily formed on the outer peripheral surface 11 of the base material 10 by performing etching with a fluorine compound using a resist layer having a pattern corresponding to the uneven structure 20 as a mask pattern.
- the base material 10 has a cylindrical shape
- the base material 10 has a cylindrical height (length in the axial direction) of 100 mm or more, and the diameter of a circle on the bottom surface or the upper surface of the cylindrical shape (orthogonal to the axial direction).
- the radial length) may be 50 mm or more and 300 mm or less.
- the radial thickness of the cylinder may be 2 mm or more and 50 mm or less.
- the size of the base material 10 is not limited to the above.
- FIG. 2A is a diagram showing an example of the concave-convex structure 20.
- the concavo-convex structure 20 includes a main recess 21 formed on the outer peripheral surface 11 which is one surface of the base material 10 and a fine concavo-convex structure 23 formed on the main recess 21.
- the main recess 21 has a structure that is depressed from the outer peripheral surface 11 of the base material 10 toward the inside in the radial direction of the base material 10.
- the main recess 21 has a predetermined average pitch P2 (second average pitch).
- the average pitch P2 of the main recesses 21 is a statistical average of the distances between adjacent main recesses 21 (for example, the distance between the centers of the adjacent main recesses 21) within a predetermined range.
- the fine concavo-convex structure 23 is formed in the main recess 21. More specifically, the fine concavo-convex structure 23 is formed near the bottom surface of the main recess 21.
- the fine concavo-convex structure 23 has a predetermined average pitch P1 (first average pitch).
- the average pitch P1 of the fine concavo-convex structure 23 is a statistical average of the intervals of the concavities and convexities forming the fine concavo-convex structure adjacent to each other in a predetermined range.
- a plurality of main recesses 21 having a fine concavo-convex structure 23 formed near the bottom surface are regularly or irregularly formed on the base material 10.
- the average pitch P1 of the fine concavo-convex structure 23 is, for example, equal to or less than the wavelength of visible light.
- the average pitch P2 of the main recess 21 is, for example, larger than the wavelength of visible light. Therefore, the average pitch P2 of the main recess 21 is larger than the average pitch P1 of the fine concavo-convex structure 23.
- the range of the depth H1 of the recesses constituting the fine concavo-convex structure 23 is, for example, about 50 nm to 300 nm. Further, the range of the width W1 of the opening of the concave portion constituting the fine concavo-convex structure 23 is, for example, about 50 nm to 500 nm.
- the range of the depth H2 of the main recess 21 is, for example, about 1 ⁇ m to 20 ⁇ m.
- the range of the width W2 of the opening of the main recess 21 is, for example, about 5 ⁇ m to 200 ⁇ m.
- the size of the fine concavo-convex structure 23 is about 1/10 to 1/4000 of the size of the main recess 21. Therefore, the unevenness forming the fine uneven structure 23 can be formed in units of 100 to 16 million with respect to one main concave portion 21.
- FIG. 2A shows an example in which a fine concavo-convex structure 23 is formed near the bottom surface of the main recess 21 as the concavo-convex structure 20, but the present invention is not limited to this.
- the concavo-convex structure 20 may have a structure in which the fine concavo-convex structure 23 is formed near the top surface of the main convex portion 22 protruding outward in the radial direction of the base material 10.
- the base material 10 is regularly or irregularly formed with a plurality of main convex portions 22 having a fine concavo-convex structure 23 formed in the vicinity of the top surface.
- the master 1 includes the base material 10 in which the main concave portion 21 or the main convex portion 22 is formed on the outer peripheral surface 11 which is one surface, and the fine concave-convex structure 23 is formed on the main concave portion 21 or the main convex portion 22.
- the fine concavo-convex structure 23 is formed with an average pitch P1 (first average pitch), and the main concave portion 21 or the main convex portion 22 has an average pitch P2 (second average pitch) larger than the average pitch P1 of the fine concavo-convex structure 23. ) Is formed.
- the master plate 1 a plurality of main recesses 21 or main convex portions 22 are formed on the outer peripheral surface 11 at an average pitch P2, and the fine concave-convex structure 23 has an average pitch P1 (P1 ⁇ The base material 10 formed in P2) is provided. Therefore, the master 1 is formed by superimposing uneven structures having different average pitches.
- the fine concavo-convex structure 23 is formed only in the main concave portion 21 or the main convex portion 22. That is, a fine uneven structure is not formed in a portion other than the main concave portion 21 or the main convex portion 22.
- a fine concavo-convex structure 23 is formed only in the main concave portion 21 or the main convex portion 22 in this way, it is possible to form a fine concavo-convex structure such as a moth-eye structure and locally impart an antireflection effect. .. Further, it is conceivable to apply it to patterning of printing ink (Wenzel model) by applying the difference in wettability depending on the presence or absence of a fine concavo-convex structure.
- FIG. 3 is a diagram showing a configuration example of a transfer device 5 for producing a transfer product using the master 1 according to the present embodiment.
- the transfer device 5 includes a master plate 1, a base material supply roll 51, a take-up roll 52, guide rolls 53 and 54, a nip roll 55, a peeling roll 56, a coating device 57, and the like. It includes a light source 58.
- the transfer device 5 shown in FIG. 3 is a roll-to-roll type imprint device.
- the base material supply roll 51 is, for example, a roll in which a sheet-shaped base material 61 is wound in a roll shape.
- the take-up roll 52 is a roll that winds up the transferred material on which the resin layer 62 to which the concave-convex structure 20 of the master 1 is transferred is laminated.
- the guide rolls 53 and 54 are rolls that convey the sheet-shaped base material 61 before and after transfer.
- the nip roll 55 is a roll that presses the sheet-like base material 61 on which the resin layer 62 is laminated against the master 1.
- the peeling roll 56 is a roll that peels the sheet-like base material 61 on which the resin layer 62 is laminated from the master 1 after transferring the uneven structure 20 to the resin layer 62.
- the coating device 57 includes a coating means such as a coater, and coats the photocurable resin composition on the sheet-like base material 61 to form the resin layer 62.
- the coating device 57 may be, for example, a gravure coater, a wire bar coater, a die coater, or the like.
- the light source 58 is a light source that emits light having a wavelength at which the photocurable resin composition can be cured.
- the light source 58 may be, for example, an ultraviolet lamp or the like.
- the photocurable resin composition is a resin that cures when irradiated with light of a predetermined wavelength.
- the photocurable resin composition may be, for example, an ultraviolet curable resin such as an acrylic acrylate resin or an epoxy acrylate resin.
- the photocurable resin composition may contain a polymerization initiator, a filler, a functional additive, a solvent, an inorganic material, a pigment, a charge inhibitor, a sensitizing dye, or the like, if necessary.
- the resin layer 62 may be formed of a thermosetting resin composition.
- the transfer device 5 is provided with a heater instead of the light source 58. By heating the resin layer 62 with a heater, the resin layer 62 can be cured and the uneven structure 20 can be transferred.
- the thermosetting resin composition may be, for example, a phenol resin, an epoxy resin, a melamine resin, a urea resin, or the like.
- the sheet-shaped base material 61 is continuously delivered from the base material supply roll 51 via the guide roll 53.
- the photocurable resin composition is applied to the delivered sheet-shaped base material 61 by the coating device 57, and the resin layer 62 is laminated on the sheet-shaped base material 61.
- the sheet-like base material 61 on which the resin layer 62 is laminated is pressed against the master 1 by the nip roll 55.
- the uneven structure 20 formed on the outer peripheral surface 11 of the master 1 is transferred to the resin layer 62.
- the resin layer 62 to which the uneven structure 20 is transferred is cured by irradiation with light from the light source 58.
- the inverted structure of the concave-convex structure 20 of the master 1 is formed in the resin layer 62.
- the sheet-like base material 61 to which the uneven structure 20 is transferred is peeled from the master 1 by the peeling roll 56, sent to the winding roll 52 via the guide roll 54, and wound.
- the uneven structure 20 formed on the outer peripheral surface 11 of the master 1 can be efficiently transferred to the sheet-like base material 61.
- the concave-convex structure formed on the transferred product to which the concave-convex structure 20 of the master 1 is transferred may be further transferred to produce a transferred product having the same concave-convex structure as the master 1. That is, the transferred material produced by using the master 1 according to the present embodiment includes the transferred material and the unevenness to which the shape of the uneven structure 20 formed on the outer peripheral surface 11 which is one surface of the base material 10 of the master 1 is transferred.
- a transfer product (a transfer product having a concavo-convex structure similar to that of the master 1) in which the inverted shape of the structure 20 is transferred is included.
- a transcript having the same uneven structure as the master 1 can be used as a replica master, for example.
- the resist layer formed on the outer peripheral surface 11 of the master 1 is exposed to form a latent image by lithography, and the substrate 10 is etched using the resist layer developed after forming the latent image as an etching mask. As a result, the concave-convex structure 20 is formed on the base material 10.
- the configuration of the exposure apparatus 3 for exposing the resist layer described above will be described with reference to FIG.
- the exposure apparatus 3 includes a laser light source 31, a first mirror 33, a photodiode (PhotoDiode: PD) 34, a condenser lens 36, a collimator lens 38, and an electro-optical polarizing element ( It includes an Electro-Optic Deflector (EOD) 39, a second mirror 41, a beam expander (BEX) 43, and an objective lens 44.
- a laser light source 31 a first mirror 33
- a photodiode (PhotoDiode: PD) 34 a condenser lens 36
- a collimator lens 38 a collimator lens 38
- an electro-optical polarizing element It includes an Electro-Optic Deflector (EOD) 39, a second mirror 41, a beam expander (BEX) 43, and an objective lens 44.
- EOD Electro-Optic Deflector
- BEX beam expander
- the laser light source 31 is controlled by the exposure signal generated by the control mechanism 47.
- the laser beam 30 emitted from the laser light source 31 irradiates the base material 10 placed on the turntable 46.
- the turntable 46 on which the base material 10 is placed is rotated by a spindle motor 45 controlled by a rotation control signal synchronized with an exposure signal.
- the laser light source 31 is a light source that emits laser light 30 that exposes the resist layer formed on the outer peripheral surface 11 of the base material 10.
- the laser light source 31 may be, for example, a semiconductor laser light source that emits laser light having a wavelength belonging to the blue light band of 400 nm to 500 nm.
- the laser beam 30 emitted from the laser light source 31 travels straight as a parallel beam and is reflected by the first mirror 33.
- the laser light 30 reflected by the first mirror 33 is focused on the electro-optical polarizing element 39 by the condenser lens 36, and then converted into a parallel beam again by the collimator lens 38.
- the parallel beam laser beam 30 is reflected by the second mirror 41 and is horizontally guided to the beam expander 43.
- the first mirror 33 is composed of a polarization beam splitter, and has a function of reflecting one of the polarization components and transmitting the other of the polarization components.
- the polarized light component transmitted through the first mirror 33 is photoelectrically converted by the photodiode 34, and the photoelectrically converted light receiving signal is input to the laser light source 31.
- the laser light source 31 can adjust the output of the laser beam 30 and the like based on the feedback from the input light receiving signal.
- the electro-optical polarizing element 39 is an element capable of controlling the irradiation position of the laser beam 30 at a distance of about nanometers.
- the exposure apparatus 3 can finely adjust the irradiation position of the laser beam 30 irradiated to the base material 10 by the electro-optical polarizing element 39.
- the beam expander 43 shapes the laser beam 30 guided by the second mirror 41 into a desired beam shape, and the laser beam 30 is formed on the outer peripheral surface 11 of the base material 10 via the objective lens 44. Irradiate to.
- the turntable 46 supports the base material 10 and is rotated by the spindle motor 45 to rotate the base material 10.
- the turntable 46 spirally forms an outer peripheral surface 11 of the base material 10 by moving the irradiation position of the laser beam 30 in the axial direction (that is, the arrow R direction) of the base material 10 while rotating the base material 10. Exposure can be performed.
- the irradiation position of the laser beam 30 may be moved by moving the laser head including the laser light source 31 along the slider.
- the control mechanism 47 controls the output intensity and the irradiation position of the laser beam 30 by controlling the laser light source 31.
- the control mechanism 47 includes a formatter 48 and a driver 49.
- the driver 49 controls the emission of the laser beam 30 by the laser light source 31 based on the exposure signal generated by the formatter 48.
- the driver 49 may control the laser light source 31 so that the output intensity of the laser beam 30 increases as the waveform amplitude of the exposure signal increases.
- the driver 49 may control the irradiation position of the laser beam 30 by controlling the emission timing of the laser beam 30 based on the waveform shape of the exposure signal. As the output intensity of the laser beam 30 increases, the size and depth of the latent image formed on the resist layer can be increased.
- the spindle motor 45 rotates the turntable 46 based on the rotation control signal.
- the spindle motor 45 may control the rotation so that the turntable 46 makes one rotation when a predetermined number of pulses are input by the rotation control signal.
- the rotation control signal can be generated in synchronization with the exposure signal by being generated from a reference clock signal common to the exposure signal.
- the manufacturing method of the master 1 according to the present embodiment will be described.
- the formation of an etching mask by exposure and development of an inorganic resist layer by thermal lithography and the formation of an etching mask by exposure and development of an organic resist layer by optical lithography are combined.
- the uneven structure 20 having a shape in which two uneven patterns having different average pitches are superimposed is formed on the outer peripheral surface 11 of the master 1.
- a method of manufacturing a master, which forms an etching mask by exposing and developing an organic resist layer by optical lithography will be described with reference to FIGS. 5A to 5D.
- an organic resist layer 26 made of an organic material is formed on the outer peripheral surface 11 which is one surface of the base material 10.
- the organic material constituting the organic resist layer 26 for example, a novolac-based resist, a chemically amplified resist, or the like can be used.
- the organic material as described above can be formed as an organic resist layer 26 by using, for example, a spin coating method.
- the organic resist layer 26 is a positive resist.
- the organic resist layer 26 formed on the outer peripheral surface 11 of the base material 10 is irradiated with the laser beam 30, and the organic resist layer 26 is exposed by optical lithography.
- the exposure can be performed by the exposure apparatus 3 described with reference to FIG.
- the organic resist layer 26 is altered by irradiation with laser light 30, and a latent image 26a is formed.
- the wavelength of the laser beam 30 is not particularly limited, but may be a wavelength belonging to the blue light band of 400 nm to 500 nm.
- the light source that emits the laser beam 30 may be, for example, a semiconductor laser light source whose output can be easily adjusted.
- the depth of the latent image 26a is the depth of the spot SP of the laser beam 30 in the cross-sectional view as shown in FIG. 5B.
- the center is deeper. That is, the latent image 26a is formed in a semicircular shape.
- the organic resist layer 26 is exposed not only to the spot SP of the laser beam 30 but also to the peripheral portion of the spot SP. Therefore, the range of the latent image 26a is wider than the range of the spot SP of the laser beam 30.
- a recess 26b corresponding to the latent image 26a is formed in the organic resist layer 26 as shown in FIG. 5C.
- an alkaline solution such as an aqueous solution of TMAH (TetraMethylAmmonium Hydrooxide: tetramethylammonium hydroxide) or various organic solvents such as ester or alcohol can be used.
- TMAH TetraMethylAmmonium Hydrooxide: tetramethylammonium hydroxide
- various organic solvents such as ester or alcohol
- the organic resist layer 26 from which the latent image 26a has been removed is formed.
- the organic resist layer 26 is a negative resist
- the exposed portion exposed with the laser beam 30 has a lower dissolution rate in the developing solution than the non-exposed portion not exposed with the laser beam 30. Therefore, the unexposed portion is removed by the developing process. Thereby, it is also possible to leave the latent image 26a.
- the base material 10 is etched using the developed organic resist layer 26 as an etching mask (first etching mask). By doing so, as shown in FIG. 5D, the base material 10 is formed with the recess 24 corresponding to the latent image 26a.
- the etching of the base material 10 may be performed by either dry etching or wet etching.
- the base material 10 is a glass material containing SiO 2 as a main component (for example, quartz glass)
- the base material 10 is etched by dry etching using carbon fluoride gas or wet using hydrofluoric acid or the like. It can be done by etching.
- an inorganic resist layer 27 made of an inorganic material is formed on the outer peripheral surface 11 which is one surface of the base material 10.
- the inorganic material constituting the inorganic resist layer 27 for example, a metal oxide containing one or more kinds of transition metals such as tungsten (W) and molybdenum (Mo) can be used.
- the above-mentioned inorganic material can be formed as an inorganic resist layer 27 by using, for example, a sputtering method.
- the inorganic resist layer 27 is a positive resist.
- the inorganic resist layer 27 formed on the outer peripheral surface 11 of the base material 10 is irradiated with the laser beam 30, and the inorganic resist layer 27 is exposed by thermal lithography.
- the exposure can be performed by the exposure apparatus 3 described with reference to FIG.
- thermal lithography the inorganic resist layer 27 is altered by the heat of the irradiated laser beam 30 to form a latent image 27a.
- the laser beam 30 the same laser beam 30 used in the optical lithography described with reference to FIG. 5B can be used.
- the temperature distribution is not uniform and is biased. Therefore, the inorganic resist layer 27 is altered in the high temperature portion of the spot SP of the laser beam 30, and the latent image 27a is formed. Further, the depth of the latent image 27a becomes deeper as the temperature becomes higher. Therefore, the range of the latent image 27a is narrower than the range of the spot SP of the laser beam 30, and the depth varies even within the latent image 27a.
- a recess 27b corresponding to the latent image 27a is formed in the inorganic resist layer 27 as shown in FIG. 6C.
- An alkaline solution such as an aqueous TMAH solution can be used for developing the inorganic resist layer 27.
- the base material 10 is etched using the developed inorganic resist layer 27 as an etching mask. By doing so, as shown in FIG. 6D, the base material 10 is formed with the recess 25 corresponding to the latent image 27a.
- the etching of the base material 10 may be performed by either dry etching or wet etching.
- the manufacturing method of the master 1 according to the present embodiment includes a first forming step and a second forming step.
- a fine concavo-convex structure 23 having a predetermined average pitch P1 (first average pitch) is formed on the outer peripheral surface 11 which is one surface of the base material 10.
- the main concave portion 21 or the main convex having a predetermined average pitch P2 (second average pitch) larger than the average pitch P1 is formed on the outer peripheral surface 11 of the base material 10 on which the fine uneven structure 23 is formed.
- the part 22 is formed.
- the main concave portion 21 or the main convex portion 22 is formed while maintaining the shape of at least a part of the fine concavo-convex structure 23 in the main concave portion 21 or the main convex portion 22.
- the first forming step and the second forming step will be described in more detail.
- the inorganic resist layer 27 is formed on the outer peripheral surface 11 which is one surface of the base material 10.
- the inorganic resist layer 27 can be formed into a film by, for example, the method described with reference to FIG. 6A.
- the inorganic resist layer 27 formed on the outer peripheral surface 11 of the base material 10 is irradiated with laser light 30 (not shown), and the inorganic resist layer 27 is exposed by thermal lithography.
- the exposure can be performed by the exposure apparatus 3 described with reference to FIG.
- the inorganic resist layer 27 is altered by the heat of the irradiated laser beam 30, and a latent image 27a is formed.
- the latent image 27a formed by thermal lithography can be made smaller than the spot SP of the laser beam 30.
- the latent image 27a is formed corresponding to the fine concavo-convex structure 23.
- the inorganic resist layer 27 can be developed by, for example, the method described with reference to FIG. 6C.
- the base material 10 is etched using the developed inorganic resist layer 27 as an etching mask (first etching mask). By doing so, as shown in FIG. 7D, the base material 10 is formed with the recess 23a corresponding to the latent image 27a.
- the recess 23a corresponds to the fine concavo-convex structure 23.
- the etching of the base material 10 may be performed by either dry etching or wet etching.
- the first forming step includes the first film forming step (FIG. 7A), the first exposure step (FIG. 7B), the first developing step (FIG. 7C), and the first etching step. (Fig. 7D) and included.
- the inorganic resist layer 27 is formed on the outer peripheral surface 11 which is one surface of the base material 10.
- the inorganic resist layer 27 is exposed by thermal lithography to form a latent image 27a corresponding to the fine concavo-convex structure 23.
- the inorganic resist layer 27 on which the latent image 27a is formed is developed.
- the base material 10 is etched using the developed inorganic resist layer 27 as an etching mask (first etching mask) to form the fine concavo-convex structure 23.
- the organic resist layer 26 is formed on the outer peripheral surface 11 of the base material 10 on which the recess 23a (fine concavo-convex structure 23) is formed.
- the organic resist layer 26 can be formed into a film by, for example, the method described with reference to FIG. 5A.
- the organic resist layer 26 formed on the outer peripheral surface 11 of the base material 10 is irradiated with laser light 30 (not shown), and the organic resist layer 26 is exposed by optical lithography.
- the exposure can be performed by the exposure apparatus 3 described with reference to FIG.
- the organic resist layer 26 is altered by irradiation with the laser beam 30, and a latent image 26a is formed.
- the latent image 26a formed by optical lithography has a size larger than that of the spot SP of the laser beam 30.
- the latent image 26a is formed corresponding to the main recess 21.
- the organic resist layer 26 can be developed by, for example, the method described with reference to FIG. 5C.
- the base material 10 is etched using the developed organic resist layer 26 as an etching mask (second etching mask). By doing so, as shown in FIG. 7H, the main recess 21 is formed in the base material 10.
- the etching of the base material 10 is performed so that the etching rate of the organic resist layer 26 is higher than the etching rate of the base material 10.
- the main recess 21 can be formed while maintaining the shape of at least a part of the recess 23a (fine uneven structure 23) in the main recess 21. can.
- the fine concavo-convex structure 23 formed in other than the main recess 21 can be removed.
- at least a part of the recess 23a formed at the position corresponding to the main recess 21 is formed in the main recess 21 as the fine concavo-convex structure 23. That is, the base material 10 in which the main recess 21 is formed on one surface (outer peripheral surface 11) and the fine concavo-convex structure 23 is formed in the main recess 21 is produced.
- the second forming step includes the second film forming step (FIG. 7E), the second exposure step (FIG. 7F), the second developing step (FIG. 7G), and the second etching step. (Fig. 7H) and included.
- the organic resist layer 26 is formed on the outer peripheral surface 11 which is one surface of the base material 10 on which the recess 23a (fine uneven structure 23) is formed.
- the organic resist layer 26 is exposed by optical lithography to form a latent image 26a corresponding to the main recess 21.
- the organic resist layer 26 on which the latent image 26a is formed is developed.
- the base material 10 is etched using the developed organic resist layer 26 as an etching mask (second etching mask) to form the main recess 21.
- the main recess 21 is formed while maintaining the shape of at least a part of the recess 23a (fine concavo-convex structure 23) in the main recess 21.
- the latent image 26a formed by the exposure and development of the organic resist layer 26 is not limited to the example shown in FIG. 7F.
- the latent image 26a may be formed so as to reach the outer peripheral surface 11 of the base material 10 from the surface of the organic resist layer 26.
- the wall surface of the latent image 26a may be formed so as to be substantially perpendicular to the outer peripheral surface 11 of the base material 10. Since the steps up to the film formation of the organic resist layer 26 are the same as the steps described with reference to FIGS. 7A to 7E, the description thereof will be omitted.
- the organic resist layer 26 is developed to form a recess 26b reaching the base material 10 in the organic resist layer 26 as shown in FIG. 8B.
- the wall surface of the recess 26b is substantially perpendicular to the outer peripheral surface 11 of the base material 10.
- the base material 10 in which the fine concavo-convex structure 23 is formed in the main recess 21 can be manufactured. That is, it is possible to manufacture the master 1 including the base material 10 in which the main recess 21 is formed on one surface (outer peripheral surface 11) and the fine uneven structure 23 is formed in the main recess 21. Note that, in the base material 10 shown in FIG. 8C, unlike the base material 10 shown in FIG. 7H, the wall surface of the main recess 21 is substantially perpendicular to the outer peripheral surface 11 of the base material.
- the organic resist layer 26 shown in FIG. 8B by using the organic resist layer 26 as a negative resist, a portion other than the latent image 26a can be removed. After that, by etching the base material 10, the etching proceeds from the portion other than the latent image 26a, so that the base material 10 in which the fine concavo-convex structure 23 is formed on the main convex portion 22 as shown in FIG. 2B is produced. be able to.
- the method for manufacturing the master 1 includes the first forming step and the second forming step.
- a fine concavo-convex structure 23 having an average pitch P1 (first average pitch) is formed on one surface (outer peripheral surface 11) of the base material 10.
- the convex portion 22 is formed.
- the main concave portion 21 is formed while maintaining the shape of at least a part of the fine uneven structure 23 in the main concave portion 21 or the main convex portion 22.
- the master plate 1 formed by superimposing the concave-convex structures having different average pitches can be obtained. Can be manufactured. Further, by using such a master 1, it is possible to manufacture a transfer product formed by superimposing uneven structures having different average pitches, and an article including such a transfer product.
- Example 1 The master according to Example 1 was produced by the following steps. First, a tungsten oxide is deposited with a thickness of 55 nm on the outer peripheral surface of a base material (axial length 100 mm, diameter ⁇ 132, wall thickness 4.5 mm) made of cylindrical quartz glass by a sputtering method. Then, an inorganic resist layer was formed. Next, using the exposure apparatus 3 shown in FIG. 4, thermal lithography was performed by laser light from a semiconductor laser light source having a wavelength of 405 nm, and a latent image corresponding to the fine concavo-convex structure 23 was formed on the inorganic resist layer. The rotation speed of the base material was 900 rpm.
- the exposed base material was developed at 27 ° C. for 900 seconds using a TMAH 2.38 mass% aqueous solution (manufactured by Tokyo Ohka Kogyo Co., Ltd.) to dissolve the inorganic resist layer of the latent image portion and to dissolve the inorganic resist. A recess was formed in the layer.
- TMAH 2.38 mass% aqueous solution manufactured by Tokyo Ohka Kogyo Co., Ltd.
- RIE reactive ion etching
- an AZ4210 positive resist was formed on the outer peripheral surface of the base material from which the inorganic resist layer had been removed by a dip coating method to a thickness of 5 ⁇ m to form an organic resist layer.
- photolithography was performed by laser light from a semiconductor laser light source having a wavelength of 405 nm, and a latent image corresponding to the main recess 21 was formed in the organic resist layer.
- the rotation speed of the base material was 900 rpm.
- a semicircular latent image was formed in a cross-sectional view.
- the organic resist layer of the latent image portion was dissolved by developing the exposed base material at 27 ° C. for 180 seconds using a TMAH 2.38 mass% aqueous solution (manufactured by Tokyo Ohka Kogyo Co., Ltd.) to dissolve the organic resist. A recess was formed in the layer.
- RIE reactive ion etching
- CHF 3 gas (30 sccm) at a gas pressure of 0.5 Pa and an input power of 150 W.
- the material was etched for 300 minutes. Then, the remaining organic resist layer was removed.
- Example 2 In this embodiment, as the latent image formed on the organic resist layer, instead of the semicircular latent image shown in FIG. 7F, it reaches the outer peripheral surface of the base material shown in FIG. 8A, and the wall surface is the base material. A latent image was formed that was substantially perpendicular to the outer peripheral surface of the. In other steps, the master according to Example 2 was manufactured by the same method as in Example 1.
- Comparative Example 1 In Comparative Example 1, a master was produced by the steps described with reference to FIGS. 5A to 5D.
- an inorganic resist layer was formed on the outer peripheral surface of the same base material as in Example 1 by the same method as in Example 1.
- thermal lithography was performed by the same method as in Example 1 to form a latent image on the inorganic resist layer.
- the inorganic resist layer was developed and etched by the same method as in Example 1 to produce a master according to Comparative Example 1.
- Comparative Example 2 In Comparative Example 2, a master was produced by the steps described with reference to FIGS. 6A to 6D.
- an organic resist layer was formed on the outer peripheral surface of the same base material as in Example 1 by the same method as in Example 1.
- optical lithography was performed by the same method as in Example 1 to form a latent image on the organic resist layer.
- the organic resist layer was developed and etched by the same method as in Example 1 to produce a master according to Comparative Example 2.
- FIGS. 9A, 9B, 10A, and 10B Images of the transcripts produced using Examples 1 and 2 and Comparative Examples 1 and 2 observed with a scanning electron microscope (SEM) are shown in FIGS. 9A, 9B, 10A, and 10B.
- FIG. 9A is an SEM image diagram of a transcript produced using the master according to Example 1 at a magnification of 1000 times.
- FIG. 9B is an SEM image diagram of a transcript produced using the master according to Example 2 at a magnification of 10000 times.
- FIG. 10A is an SEM image diagram of a transcript produced using the master according to Comparative Example 1 at a magnification of 1000 times.
- FIG. 10B is an SEM image diagram of a transcript produced using the master according to Comparative Example 2 at a magnification of 10000 times.
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Abstract
Description
(実施例1)
以下の工程により、実施例1に係る原盤を作製した。まず、円筒形状の石英ガラスにて構成された基材(軸方向の長さ100mm、直径φ132、肉厚4.5mm)の外周面に、スパッタ法でタングステン酸化物を55nmの厚さで成膜し、無機レジスト層を形成した。次に、図4に示す露光装置3を用いて、波長405nmの半導体レーザ光源からのレーザ光により熱リソグラフィーを行い、無機レジスト層に微細凹凸構造23に対応する潜像を形成した。基材の回転数は900rpmとした。
本実施例では、有機レジスト層に形成する潜像として、図7Fに示す、断面視で半円状の潜像の代わりに、図8Aに示す、基材の外周面に達し、壁面が基材の外周面に対して概ね垂直となる潜像を形成した。その他の工程は実施例1と同様の方法により、実施例2に係る原盤を製造した。
比較例1では、図5Aから図5Dを参照して説明した工程により、原盤を作製した。
比較例2では、図6Aから図6Dを参照して説明した工程により、原盤を作製した。
実施例1,2および比較例1,2に係る原盤を用いて転写物を製造した。具体的には、図3に示す転写装置5を用いて、原盤の外周面に形成された凹凸構造を紫外線硬化樹脂に転写した。転写物のシート状基材には、ポリエチレンテレフタレート(PolyEthylene Terephthalate:PET)フィルムを用いた。紫外線硬化樹脂は、メタルハライドランプにより、1000mJ/cm2の紫外線を1分間照射することで硬化させた。
実施例1,2および比較例1,2を用いて製造した転写物を走査型電子顕微鏡(Scanning Electron Microscope:SEM)にて観察した画像を図9A,9B,10A,10Bに示す。図9Aは、実施例1に係る原盤を用いて製造した転写物を拡大倍率1000倍にて撮像したSEM画像図である。図9Bは、実施例2に係る原盤を用いて製造した転写物を拡大率10000倍にて撮像したSEM画像図である。図10Aは、比較例1に係る原盤を用いて製造した転写物を拡大倍率1000倍にて撮像したSEM画像図である。図10Bは、比較例2に係る原盤を用いて製造した転写物を拡大率10000倍にて撮像したSEM画像図である。
3 露光装置
5 露光装置
10 基材
11 外周面
20 凹凸構造
21 主凹部
22 主凸部
23 微細凹凸構造
23a 凹部
24,25 基材の凹部
26 有機レジスト層
26a,27a 潜像
26b 有機レジスト層の凹部
27 無機レジスト層
27b 無機レジスト層の凹部
30 レーザ光
31 レーザ光源
33 第1ミラー
34 フォトダイオード
36 集光レンズ
38 コリメータレンズ
39 電気光学偏光素子
41 第2ミラー
43 ビームエキスパンダ
44 対物レンズ
45 スピンドルモータ
46 ターンテーブル
47 制御機構
48 フォーマッタ
49 ドライバ
51 基材供給ロール
52 巻取ロール
53,54 ガイドロール
55 ニップロール
56 剥離ロール
57 塗布装置
58 光源
61 シート状基材
62 樹脂層
Claims (7)
- 基材の一面に第1の平均ピッチを有する微細凹凸構造を形成する第1の形成ステップと、
前記微細凹凸構造が形成された前記基材の一面に、前記第1の平均ピッチよりも大きい第2の平均ピッチを有する主凹部または主凸部を形成するステップであって、前記主凹部または前記主凸部における前記微細凹凸構造の少なくとも一部の形状を維持しつつ前記主凹部または前記主凸部を形成する第2の形成ステップと、を含む原盤の製造方法。 - 請求項1に記載の原盤の製造方法において、
前記第1の形成ステップは、
前記基材の一面に無機レジスト層を成膜する第1の成膜ステップと、
熱リソグラフィーにより、前記無機レジスト層を露光して、前記微細凹凸構造に対応する潜像を形成する第1の露光ステップと、
前記潜像が形成された無機レジスト層を現像する第1の現像ステップと、
現像後の前記無機レジスト層を第1のエッチングマスクとして前記基材をエッチングして前記微細凹凸構造を形成する第1のエッチングステップと、を含み、
前記第2の形成ステップは、
前記微細凹凸構造が形成された前記基材の一面に有機レジスト層を成膜する第2の成膜ステップと、
光リソグラフィーにより、前記有機レジスト層を露光して、前記主凹部または前記主凸部に対応する潜像を形成する第2の露光ステップと、
前記潜像が形成された有機レジスト層を現像する第2の現像ステップと、
現像後の前記有機レジスト層を第2のエッチングマスクとして前記基材をエッチングして前記主凹部または前記主凸部を形成する第2のエッチングステップと、を含む原盤の製造方法。 - 請求項2に記載の原盤の製造方法において、
前記第2のエッチングステップでは、
前記有機レジスト層のエッチングレートが、前記基材のエッチングレートよりも大きい、原盤の製造方法。 - 請求項1から3のいずれか一項に記載の原盤の製造方法において、
前記第1の平均ピッチは、可視光の波長以下であり、
前記第2の平均ピッチは、可視光の波長より大きい、原盤の製造方法。 - 一面に主凹部または主凸部が形成され、前記主凹部または前記主凸部に微細凹凸構造が形成された基材を備え、
前記微細凹凸構造は、第1の平均ピッチで形成され、
前記主凹部または前記主凸部は、前記第1の平均ピッチよりも大きい第2の平均ピッチで形成される、原盤。 - 請求項5に記載の原盤の前記基材の一面に形成された凹凸構造の形状または前記凹凸構造の形状の反転形状が転写された転写物。
- 請求項6に記載の転写物を備える物品。
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