WO2008032819A1 - Ébauche de masque et procédé de fabrication de masque de transfert - Google Patents
Ébauche de masque et procédé de fabrication de masque de transfert Download PDFInfo
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- WO2008032819A1 WO2008032819A1 PCT/JP2007/067932 JP2007067932W WO2008032819A1 WO 2008032819 A1 WO2008032819 A1 WO 2008032819A1 JP 2007067932 W JP2007067932 W JP 2007067932W WO 2008032819 A1 WO2008032819 A1 WO 2008032819A1
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- Prior art keywords
- film
- mask
- pattern
- resist
- mask blank
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Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F1/00—Originals for photomechanical production of textured or patterned surfaces, e.g., masks, photo-masks, reticles; Mask blanks or pellicles therefor; Containers specially adapted therefor; Preparation thereof
- G03F1/38—Masks having auxiliary features, e.g. special coatings or marks for alignment or testing; Preparation thereof
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F1/00—Originals for photomechanical production of textured or patterned surfaces, e.g., masks, photo-masks, reticles; Mask blanks or pellicles therefor; Containers specially adapted therefor; Preparation thereof
- G03F1/26—Phase shift masks [PSM]; PSM blanks; Preparation thereof
- G03F1/32—Attenuating PSM [att-PSM], e.g. halftone PSM or PSM having semi-transparent phase shift portion; Preparation thereof
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F1/00—Originals for photomechanical production of textured or patterned surfaces, e.g., masks, photo-masks, reticles; Mask blanks or pellicles therefor; Containers specially adapted therefor; Preparation thereof
- G03F1/62—Pellicles, e.g. pellicle assemblies, e.g. having membrane on support frame; Preparation thereof
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/09—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers
- G03F7/092—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers characterised by backside coating or layers, by lubricating-slip layers or means, by oxygen barrier layers or by stripping-release layers or means
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/09—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers
Definitions
- the present invention relates to a mask blank, a transfer mask, and the like used in manufacturing a semiconductor device, a display device (display panel), and the like.
- phase shift masks that enhance the line pattern resolution by emphasizing the light shielding properties of the mask pattern by using a structure (mask enhancer) with a phase shifter in the center are used. For example, o
- OPC pattern for example, an assist bar or hammer head with a line width less than 100 nm
- the shading pattern of the enhancer mask and the line width of the phase shifter must be very narrow.
- the enhancer mask wraps around the light shielding pattern to the back side of the light shielding pattern.
- the amplitude intensity of the light that has passed through maskenno and sensor is the center of the mask changer.
- the present invention has been made to solve the above-described problem, and in manufacturing a transfer mask of a semiconductor design rule (DRAM hp65 nm or less), a mask blank that can prevent a resist pattern from disappearing and prevent a pattern defect. And to provide a transfer mask.
- a semiconductor design rule DRAM hp65 nm or less
- the present invention has the following configuration.
- a mask blank comprising a thin film for forming a mask pattern formed on a substrate and a resist film formed on the thin film
- a mask blank characterized in that, by interposing an adhesion layer bonded to the thin film and the resist film, the resist film that has been patterned is prevented from falling during development when the resist film is patterned.
- the adhesion layer is configured to be removed by patterning the thin film.
- the mask blank according to any one of configurations 1 to 3, characterized in that:
- a method for producing a transfer mask wherein the intermediate layer and the thin film are sequentially patterned using the resist pattern as a mask.
- a patterning process for the intermediate layer and the thin film, and then the resist pattern and the intermediate layer are sequentially peeled off.
- the mask blank of the present invention is a mask blank comprising a thin film for forming a mask pattern formed on a substrate and a resist film formed above the thin film, the thin film and the resist film By interposing an adhesion layer bonded to the resist film, the resist film that has been patterned is prevented from falling during development when the resist film is patterned (Configuration 1).
- the adhesion layer is further improved in adhesion to the resist film by using a resin film that is resistant to the developer used during development.
- the mask blank includes a photomask blank, a phase shift mask blank, a reflective mask blank, and an imprint transfer plate substrate.
- the mask The rank includes a mask blank with a resist film and a mask blank before forming a resist film.
- the mask blank before forming the resist film includes a mask blank in which the adhesion layer according to the present invention is formed on a thin film for forming a mask pattern.
- the phase shift mask blank includes a case where a light-shielding film such as a chromium-based material is formed on the halftone film. In this case, the thin film for forming the mask pattern indicates a halftone film or a light-shielding film.
- a structure in which an absorber film of a tantalum-based material or a chromium-based material serving as a transfer pattern is formed on a multilayer reflective film or a buffer layer provided on the multilayer reflective film;
- the imprint transfer plate includes a configuration in which a transfer pattern forming thin film such as a chromium-based material is formed on a base material to be a transfer plate.
- Masks include photomasks, phase shift masks, reflective masks, and imprint transfer plates.
- the mask includes a reticle.
- a light-shielding film that blocks exposure light, etc. adjusts the amount of transmission of exposure light, etc.
- a light-shielding film that blocks exposure light, etc. adjusts the amount of transmission of exposure light, etc.
- Examples include a reflectance control film to be controlled (including an antireflection film), a phase shift film that changes the phase with respect to exposure light, and a halftone film that has a light shielding function and a phase shift function.
- the mask blank of the present invention is configured such that the adhesion layer is removed in the patterning process of the thin film (Configuration 4), whereby the chemically amplified resist film formed on the mask blank is formed.
- the pattern can be faithfully transferred to the thin film. That is, it can be transferred to a thin film so as to maintain the resolution of the chemically amplified resist film on the mask blank obtained by the adhesion layer, and for transfer obtained by patterning the thin film.
- the resolution of the pattern is also good, and the pattern accuracy is also good.
- the mask blank of the present invention is particularly effective when it is a thin film metal film for forming the mask pattern (Configuration 5).
- the metal film include chromium, tantalum, molybdenum, titanium, hafnium, tungsten, an alloy containing these elements, or a film made of a material containing the above elements or the above alloys.
- the mask blank of the present invention is particularly effective when the thin film for forming the mask pattern is a silicon-containing film containing silicon (Configuration 6).
- a silicon-containing film A silicon film, a metal silicide film containing silicon and a metal of chromium, tantalum, molybdenum, titanium, hafnium, tungsten, and a film containing at least one of oxygen, nitrogen, and carbon in the silicon film or metal silicide film can do.
- the mask blank of the present invention is useful when the resist film is a chemically amplified resist film, and is further subjected to pattern exposure (drawing) with an electron beam accelerated by an acceleration voltage of 50 keV or more. It is particularly useful when a resist pattern is to be formed. This is because the present invention is intended to further improve the resolution of the chemically amplified resist pattern formed on the mask blank when 50 keV EB lithography is applied.
- an acid of a catalyst substance generated in the resist film by exposure reacts with a functional group or a functional substance that controls the solubility of the polymer in a subsequent heat treatment step.
- a resist film that exhibits a resist function is included.
- the expression of the resist function means that, for example, it becomes soluble in alkali by removing a functional group or the like!
- the mask blank of the present invention is particularly effective when it is used for forming a resist pattern having a line width of less than lOOnm on the mask blank.
- mask blanks include OPC masks and masks having a mask sensor structure (a sensor mask).
- OPC masks and enhancer masks the width of the auxiliary pattern provided around this pattern is the narrowest in order to improve the resolution of this pattern. It is particularly useful.
- a transfer mask and a manufacturing method thereof according to the present invention are characterized in that a transfer pattern formed by patterning the thin film in the mask blank according to the present invention is formed on a substrate. 7).
- the transfer mask of the present invention can satisfy the pattern accuracy required for the corresponding transfer mask with a DRAM half pitch of 65 nm or less in the semiconductor design rule.
- the mask blank of the present invention is a mask blank having a resist film on a substrate on which a thin film is formed
- the intermediate layer for preventing the collapse of the resist pattern formed from the resist film is interposed between the thin film and the resist film, the resist film force and the resist pattern can be reduced.
- the resist pattern can be prevented from collapsing during the process of forming the resist or after the resist pattern is formed.
- an intermediate layer for preventing the resist pattern from collapsing solid base with respect to the ground and the resist pattern.
- a resist pattern which is usually relatively soft
- the resist pattern force aspect ratio formed from the resist film includes a pattern of 3 or more
- the resist pattern (columnar structure) has poor stability.
- the resist pattern is likely to collapse during the process of forming the resist pattern from the resist film or after the resist pattern is formed, the invention according to Configuration 10 can prevent this.
- the invention according to Configuration 11 is the mask blank according to the present invention, wherein the intermediate layer is insoluble in a developer for forming a resist pattern on the resist film.
- an intermediate layer for preventing the resist pattern from collapsing (a resist pattern that corresponds to a solid base with respect to the ground and the resist pattern and / or is usually relatively soft (columnar structure) Is equivalent to a layer that imparts vibration damping and seismic isolation properties)), and can be prevented from being eroded by the developer, and as a result, resist patterns can be made even more unlikely to collapse.
- the invention according to Structure 12 is the mask blank according to the present invention, wherein the intermediate layer is patterned when the thin film is subjected to a patterning process using the resist pattern as a mask. Is a special feature.
- the intermediate layer can be patterned by an etchant used when patterning the thin film using the resist pattern as a mask, thereby simplifying the process. This is advantageous for improving the resolution of a transfer pattern formed using a resist pattern as a mask.
- the invention according to Configuration 13 is the mask blank according to the present invention, wherein the intermediate layer is stripped when the resist pattern is stripped from the substrate.
- the intermediate layer can be peeled off by a stripping solution or stripping means used when stripping the resist pattern from the substrate, whereby the process can be simplified.
- the mask blank of the present invention is particularly effective when the thin film is a film containing chromium or a film containing silicon (Configuration 14).
- the film containing chromium or the film containing silicon for example, the materials listed above can be used.
- the invention of the method for manufacturing a transfer mask according to Configuration 15 includes a thin film for forming a mask pattern, an intermediate layer covering at least a region where the mask pattern is formed on the thin film, A mask blank having a formed resist pattern is prepared, and the intermediate layer and the thin film are sequentially patterned using the resist pattern as a mask.
- the invention according to Configuration 16 is a method of manufacturing a transfer mask according to the present invention.
- the resist pattern and the intermediate layer are sequentially peeled off.
- sequential peeling includes the case where peeling is performed simultaneously using the same stripping solution or stripping means.
- examples of the substrate include a synthetic quartz substrate, a soda lime glass substrate, an Al-free glass substrate, a low thermal expansion glass substrate, and the like.
- a mask blank and a mask that can prevent the disappearance of a resist pattern and prevent a pattern defect when a semiconductor design rule (DRAM hp65 nm or less) transfer mask is manufactured. it can.
- FIG. 1 shows an example of a mask blank 10 according to the first embodiment of the present invention.
- the mask blank 10 is a mask blank for a binary mask, and includes a transparent substrate 12, a light shielding film 13 (a laminated film of a light shielding layer 14 and an antireflection layer 16), and an adhesion layer (intermediate layer). 18) and chemically amplified resist film 20.
- the transparent substrate 12 is made of a material such as a synthetic quartz substrate or soda lime glass.
- the light shielding film 13 is a laminated film of the light shielding layer 14 and the antireflection layer 16.
- the light shielding layer 14 has, for example, a chromium nitride film 22 and a chromium carbonitride film 24 in this order on the transparent substrate 12.
- the chromium nitride film 22 is a layer mainly composed of chromium nitride (CrN), and has a film thickness of, for example, 10 to 20 nm.
- the chromium carbonitride film 24 is a layer mainly composed of chromium carbonitride (CrCN), and has a film thickness of, for example, 25 to 60 nm.
- the antireflection layer 16 is, for example, a film containing chromium and oxygen and nitrogen (CrON film), and is formed on the chromium carbonitride film 24.
- the film thickness of the antireflection layer 16 is, for example, 15 to 30 nm.
- the light shielding layer 14 and the antireflection layer 16 are made of chromium as a sputtering target, and are in a reactive gas atmosphere (for example, oxygen gas, nitrogen gas, nitrogen monoxide gas, carbon dioxide gas, hydrocarbon gas, or a mixed gas thereof).
- a reactive gas atmosphere for example, oxygen gas, nitrogen gas, nitrogen monoxide gas, carbon dioxide gas, hydrocarbon gas, or a mixed gas thereof.
- the light-shielding film 13 is composed of the material of the chromium nitride film 22, the chromium carbonitride nitride film 24, and the chromium oxynitride film from the transparent substrate 12 side.
- the region contains chromium and at least one of oxygen and nitrogen, or in each layer! / The dry etching rate can be increased.
- Examples of the material of the light-shielding film 13 include chromium alone, and chromium containing at least one element containing oxygen, nitrogen, carbon, and hydrogen (a material containing Cr).
- the film structure of the light-shielding film 13 can be a single layer or a multi-layer structure made of the above film materials. Also, with different compositions, a multi-layer structure formed stepwise or a film structure with a continuously changing composition can be obtained.
- the light-shielding film 13 is preferably a thin film with an increased dry etching rate in terms of miniaturization of a transfer pattern and improvement of pattern accuracy. Specifically, an additive element that increases the dry etching rate is added to the entire light-shielding film 13 in the film thickness direction or substantially the entire film. Oxygen and / or nitrogen can be raised as an additive element for increasing the dry etching rate.
- the light-shielding film is a thin film containing chromium
- the following materials can be selected.
- the oxygen content when the thin film containing chromium contains oxygen is preferably in the range of 5 to 80 atomic%. If the oxygen content is less than 5 atomic%, it is difficult to obtain the effect of increasing the dry etching rate. On the other hand, if the oxygen content exceeds 80 atomic%, the absorption coefficient of, for example, an ArF excimer laser (wavelength 193 nm) of the exposure light wavelength (200 ⁇ m or less) applied at a DRAM half pitch of 65 nm or less in the semiconductor design rule Therefore, it is necessary to increase the film thickness in order to obtain a desired optical density, and it is not preferable because the pattern accuracy cannot be improved.
- an ArF excimer laser wavelength 193 nm
- the nitrogen content is preferably in the range of 20 to 80 atomic%.
- the nitrogen content is less than 20 atomic%, it is difficult to obtain the effect of increasing the dry etching rate.
- the nitrogen content exceeds 80 atomic%, the wavelength of exposure light applied at a DRAM half pitch of 65 nm or less in the semiconductor design rule ( For example, the absorption coefficient S in an ArF excimer laser (wavelength: 193 nm) becomes smaller, so it is necessary to increase the film thickness to obtain the desired optical density, and pattern accuracy cannot be improved. It is not preferable.
- the thin film containing chromium may contain both oxygen and nitrogen.
- the content of oxygen and nitrogen is preferably in the range of 10 to 80 atomic%.
- the content ratio of oxygen and nitrogen in the case where the thin film containing chromium contains both oxygen and nitrogen is not particularly limited and is appropriately determined in consideration of the absorption coefficient and the like.
- the chromium thin film containing oxygen and / or nitrogen may contain other elements such as carbon, hydrogen, and helium.
- V containing oxygen and a dry etching gas From the viewpoint of reducing the amount of oxygen in the dry etching gas, it is possible to use V containing oxygen and a dry etching gas.
- the chromium-based thin film is preferably etched (patterned) by dry etching from the viewpoint of improving the pattern accuracy of the chromium-based thin film.
- a chlorine-based gas or a dry etching gas composed of a mixed gas containing a chlorine-based gas and an oxygen gas.
- the dry etching rate can be increased by performing dry etching using the above dry etching gas on a chromium-based thin film made of a material containing chromium and elements such as oxygen and nitrogen. This is because the dry etching time can be shortened and a light-shielding film pattern having a good cross-sectional shape can be formed.
- the chlorine-based gas used for the dry etching gas include CI SiCl HC1, CC1, and CHC1.
- the adhesion layer 18 prevents the resist pattern from being lost and causing pattern defects during the development process or after the development process because of insufficient adhesion in the process of forming the patterned resist film. And is formed on the light-shielding film 13.
- the adhesion layer 18 is resistant to a developer used when forming a resist pattern on the chemically amplified resist film 20, and further, the light-shielding film 13 is etched using the resist pattern as a mask. It is preferable that the etchant used for etching can be etched. Specifically, a resin film made of an organic material having a predetermined molecular weight (for example, an acrylic resin) can be used.
- the film thickness of the adhesion layer 18 is preferably 1 nm or more.
- the film thickness is preferably 2 nm to 25 ⁇ m, more preferably 2 nm to 20 nm, and still more preferably 5 nm to 15 nm.
- the mask blank 10 may be a mask blank for a phase shift mask.
- the mask blank 10 further includes, for example, a phase shift film between the transparent substrate 12 and the light shielding film 13.
- the phase shift film include various types such as chromium (CrO, CrF, etc.), molybdenum (MoSiON, MoSiN, MoSiO, etc.), tungsten (WSiON, WSiN, WSiO, etc.), and silicon (SiN, SiON, etc.).
- a known halftone film can be used.
- the mask blank 10 for the phase shift mask may include a phase shift film on the light shielding film 13.
- FIG. 1 (b) shows a state where the chemically amplified resist film 20 is patterned by exposure / development processing.
- the chemically amplified resist film 20 patterned in this manner as a mask the light-shielding film 13 is patterned by etching the adhesion layer 18 and the light-shielding film 13, and finally the chemically amplified resist film 20 and By removing the adhesion layer 18, a photomask in which a light shielding film pattern to be a transfer pattern is formed on the transparent substrate 12 can be manufactured.
- a synthetic quartz substrate having a size of 6 inches square and a thickness of 0.25 inches is used as the transparent substrate 12, and a chromium nitride film 22 and a chromium carbonitride film 24 are each formed as a light shielding layer 14 on the transparent substrate 12 by a sputtering method. Formed with. Subsequently, a chromium oxynitride film was formed as the antireflection layer 16.
- the light-shielding film 13 contains nitrogen over substantially the entire region in the film thickness direction. The thickness of the light-shielding film 13 was 68 nm.
- an adhesion layer (Fuji Film Electronics Materials, Inc .: FKB-15B) was applied by 30 nm by a spin coating method to form an adhesion layer 18. Thereafter, the adhesive layer 18 was dried by heat treatment at 200 ° C. for 10 minutes on a hot plate. Furthermore, before applying the resist, the substrate was heat-treated at 200 ° C. to remove contaminants such as organic substances adhering to the surface of the adhesion layer 18 and cleaned it.
- a chemically amplified positive resist for electron beam exposure HFE P171 (manufactured by Fuji Film Electronics Materials Co., Ltd.) is applied by a spin coating method to a thickness of 300 nm, and then heated at 130 ° C on a hot plate. After heat treatment for 10 minutes, the chemically amplified resist film 20 was dried to obtain a mask blank 10 which is a photomask blank with a resist film for ArF excimer laser exposure.
- a mask blank according to Comparative Example 1 was obtained in the same manner as in Example 1 except that the adhesion layer 18 was not formed.
- each mask blank was exposed with an electron beam exposure apparatus, and then subjected to beta treatment and development treatment after exposure to form a resist pattern. This exposure was performed with an electron beam accelerated at an acceleration voltage of 50 keV or higher.
- the resist pattern formed an 80 nm line and space pattern.
- Example 1 As a result of confirming the formed resist pattern, in Example 1, the adhesion between the chemically amplified resist film 20 and the light-shielding film 13 is good due to the adhesion layer 18, and therefore 80 nm line and space. It was confirmed that the pattern was formed with persistent force. On the other hand, in Comparative Example 1, the adhesion between the chemically amplified resist film 20 and the light-shielding film 13 was insufficient, and the resist pattern disappeared during the rinsing process after the development process.
- the adhesion layer 18 and the light-shielding film 13 are patterned by dry etching using an etching gas containing chlorine gas and oxygen gas using the resist pattern as a mask, and finally the chemically amplified resist film 20 and the adhesion layer. 18 was removed and a mask for ArF excimer laser exposure was fabricated.
- Example 1 an 80 nm line and space pattern made of a light shielding film is shielded. It was confirmed that a photo film pattern was formed and no skirt-like projections were formed on the skirt portion of the light-shielding film pattern. Also, the pattern accuracy satisfies the linearity of 10 nm or less at the semiconductor design rule DRAM half pitch of 65 nm. On the other hand, in Comparative Example 1, pattern defects due to the disappearance of the resist pattern during the rinsing process after the development process were confirmed, and a skirt-like protrusion was formed at the skirt part of the formed light-shielding film pattern. It has been confirmed that. Also, the 80nm line and space pattern was not formed, and the 200nm line and space pattern was resolved.
- FIG. 2 shows an example of a mask blank 10 according to the second embodiment of the present invention.
- the mask blank 10 includes a transparent substrate 12, a light shielding film 13 (a laminated film of the light shielding layer 14 and the antireflection layer 16), a silicon-containing film 32 (a film containing silicon), and a resin (organic) material strength.
- the silicon-containing film 32 is a film containing silicon for a hard mask used when the light-shielding film 13 is patterned, and is formed on the light-shielding film 13.
- the film thickness of the silicon-containing film 32 is, for example, 30 nm (for example, 25 to 35 nm).
- the silicon-containing film 32 may be a film containing MoSi, such as MoSiO, MoSiN, or MoSiON.
- the silicon-containing film 32 may be a film such as TaSiO, Ta SiN, TaSiON, TaBO, TaBN, TaBON, WSiO, WSiN, WSiON, SiO, SiN, or SiON.
- the silicon-containing film 32 used as a hard mask is an example of a thin film for forming a transfer pattern.
- the adhesion layer 34 prevents the resist pattern from disappearing and generating a pattern defect in the rinsing during or after the development process because of insufficient adhesion.
- the adhesion of the adhesive layer 34 made of a resin (organic) material to the silicon-containing film 32 is the same as that of the chemically amplified resist film 20 to the silicon-containing film 32 when the chemically amplified resist film 20 is formed on the silicon-containing film 32. Higher than adhesion.
- the thickness of the adhesion layer 34 is preferably, for example, 1 nm or more.
- the film thickness is preferably 2 nm or more and 25 nm or less, more preferably 2 nm or more and 20 nm or less, and still more preferably 5 nm or more and 15 nm or less.
- a chemically amplified resist film 20 is formed on the adhesion layer 34.
- FIG. 2 (b) shows a state in which the chemically amplified resist film 20 is patterned by an electron beam lithography method.
- the chemically amplified resist film 20 patterned in this way as a mask, the adhesion layer 34 and the silicon-containing film 32 are etched. Further, the light shielding film 13 is etched using the silicon-containing film 32 as a mask (hard mask). As a result, a photomask patterned with the light-shielding film 13 can be manufactured.
- a light-shielding film 13 was formed in the same manner as in Example 1 using the same transparent substrate 12 as in Example 1. Further, a MoSiON film was formed as the silicon-containing film 32. The thickness of the silicon-containing film 32 was 30 ⁇ m.
- Example 1 a resin film made of the same organic material as in Example 1 (Fuji Film Electronics Materials, Inc .: FKB-15B) was applied by spin coating to 30 nm to form an adhesion layer 34. Thereafter, the adhesive layer 34 was dried by heat treatment at 200 ° C. for 10 minutes on a hot plate. Next, a chemically amplified resist film 20 is formed in the same manner as in Example 1, and a photomask with a resist film is formed.
- a mask blank according to Comparative Example 2 was obtained in the same manner as Example 2 except that the adhesion layer 34 was not formed.
- the chemically amplified resist film was patterned. .
- each mask blank was exposed with an electron beam exposure apparatus, and then subjected to baking and development after exposure to form a resist pattern. This exposure was performed with an electron beam accelerated at an acceleration voltage of 50 keV or higher.
- the resist pattern was an 80 ⁇ m line and space pattern.
- the adhesion between the chemically amplified resist film 20 and the silicon-containing film 32 is good due to the adhesion layer 34. It was confirmed that the pattern was formed with persistent force.
- Comparative Example 2 the adhesion between the chemically amplified resist film and the silicon-containing film was insufficient, and the resist pattern disappeared during the rinsing process after the development process.
- the adhesion layer 34 and the silicon-containing film 32 were patterned by dry etching using an etching gas containing a fluorine-based gas using the resist pattern as a mask. Further, the light-shielding film 13 was patterned by dry etching using an etching gas containing chlorine gas and oxygen gas, using the patterned silicon-containing film 32 as a mask. Finally, the chemically amplified resist film 20, the adhesion layer 34, and the silicon-containing film 32 were removed, and a mask for ArF excimer laser single exposure was prepared.
- Example 2 it was confirmed that a light-shielding film pattern of 80 nm line-and-space pattern made of a light-shielding film was formed, and that no skirt-like projections were formed at the bottom of the light-shielding film pattern. It was done. Also, the pattern accuracy satisfies the linearity of 10 nm or less at the semiconductor design rule DRAM half pitch of 65 nm. On the other hand, in Comparative Example 2, pattern defects due to the disappearance of the resist pattern during the rinsing process after the development process were confirmed, and a skirt-like protrusion was formed at the skirt part of the formed light-shielding film pattern. It has been confirmed that. Also, the 80nm line and space pattern was not formed, and the 200nm line and space pattern was resolved.
- the force shown in the example in which the adhesion layers 18 and 34 are removed by the etching gas for the light-shielding film 13 or the etching gas for the silicon-containing film 32 is not limited thereto.
- the adhesion layers 18 and 34 are removed by ashing or the like, and then the light-shielding film 13 and the silicon-containing film 32 are etched and patterned using the pattern having the adhesion layer and the resist film force as a mask. No power.
- FIG. 1 is a diagram showing an example of a mask blank 10 according to a first embodiment of the present invention.
- FIG. 1 (a) shows an example of the configuration of the mask blank 10.
- FIG. 1 (b) shows a state in which the chemically amplified resist film 20 is patterned by exposure and development processing.
- FIG. 2 is a diagram showing an example of a mask blank 10 according to a second embodiment of the present invention.
- FIG. 2 (a) shows an example of the configuration of the mask blank 10.
- FIG. 2 (b) shows a state where the chemically amplified resist film 20 is patterned by an electron beam lithography method.
- 10 Mask blank, 12 ... Transparent substrate, 13 ... Light-shielding film, 14 ... Light-shielding layer, 16 ... Antireflection layer, 18 ... Adhesion layer, 20 ... Chemically amplified resist film, 22 ⁇ Chromium nitride film, 24 ⁇ Chromium carbonitride film, 32 ⁇ Silicon-containing film, 34 ⁇ Adhesion layer
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Preparing Plates And Mask In Photomechanical Process (AREA)
- Materials For Photolithography (AREA)
- Exposure Of Semiconductors, Excluding Electron Or Ion Beam Exposure (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
Description
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020097007636A KR101153525B1 (ko) | 2006-09-15 | 2007-09-14 | 마스크 블랭크 및 전사 마스크의 제조 방법 |
DE112007002165T DE112007002165T5 (de) | 2006-09-15 | 2007-09-14 | Maskenrohling und Verfahren zum Herstellen einer Übertragungsmaske |
CN2007800343813A CN101517483B (zh) | 2006-09-15 | 2007-09-14 | 掩模坯体及转印掩模的制造方法 |
US12/441,319 US8026024B2 (en) | 2006-09-15 | 2007-09-14 | Mask blank and method for manufacturing transfer mask |
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JP2006251486A JP5294227B2 (ja) | 2006-09-15 | 2006-09-15 | マスクブランク及び転写マスクの製造方法 |
JP2006-251486 | 2006-09-15 |
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WO2008032819A1 true WO2008032819A1 (fr) | 2008-03-20 |
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PCT/JP2007/067932 WO2008032819A1 (fr) | 2006-09-15 | 2007-09-14 | Ébauche de masque et procédé de fabrication de masque de transfert |
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US (1) | US8026024B2 (ja) |
JP (1) | JP5294227B2 (ja) |
KR (2) | KR101153525B1 (ja) |
CN (1) | CN101517483B (ja) |
DE (1) | DE112007002165T5 (ja) |
TW (1) | TWI402609B (ja) |
WO (1) | WO2008032819A1 (ja) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
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JP5348866B2 (ja) | 2007-09-14 | 2013-11-20 | Hoya株式会社 | マスクの製造方法 |
CN102165369A (zh) * | 2008-09-30 | 2011-08-24 | Hoya株式会社 | 光掩模坯体、光掩模及其制造方法、以及半导体器件的制造方法 |
KR101663842B1 (ko) * | 2008-11-27 | 2016-10-07 | 호야 가부시키가이샤 | 다층 반사막을 가진 기판 및 반사형 마스크 블랭크 및 반사형 마스크의 제조 방법 |
JP2011123426A (ja) * | 2009-12-14 | 2011-06-23 | Toppan Printing Co Ltd | フォトマスクブランク及びフォトマスクの製造方法 |
WO2011108470A1 (ja) | 2010-03-02 | 2011-09-09 | 旭硝子株式会社 | Euvリソグラフィ用反射型マスクブランクおよびその製造方法 |
JP5524794B2 (ja) * | 2010-09-29 | 2014-06-18 | 富士フイルム株式会社 | レジストパターンの形成方法およびそれを利用した基板の加工方法 |
US9927697B2 (en) * | 2013-08-28 | 2018-03-27 | Hoya Corporation | Mask blank, method of manufacturing mask blank and method of manufacturing transfer mask |
JP6472129B2 (ja) * | 2013-12-03 | 2019-02-20 | Hoya株式会社 | 転写用マスクの製造方法および現像液 |
JP6739960B2 (ja) | 2016-03-28 | 2020-08-12 | Hoya株式会社 | 反射型マスクブランク、反射型マスク及び半導体装置の製造方法 |
WO2018181891A1 (ja) * | 2017-03-31 | 2018-10-04 | 凸版印刷株式会社 | 位相シフトマスクブランク、位相シフトマスク及び位相シフトマスクの製造方法 |
JP2021182099A (ja) * | 2020-05-20 | 2021-11-25 | アルバック成膜株式会社 | マスクブランクスの製造方法、マスクブランクス、フォトマスク |
CN113311660B (zh) * | 2021-06-03 | 2023-07-18 | 上海传芯半导体有限公司 | 掩模基版的制作方法及具有等离子体加热装置的涂胶设备 |
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- 2006-09-15 JP JP2006251486A patent/JP5294227B2/ja active Active
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2007
- 2007-09-14 US US12/441,319 patent/US8026024B2/en active Active
- 2007-09-14 KR KR1020097007636A patent/KR101153525B1/ko active IP Right Grant
- 2007-09-14 TW TW096134471A patent/TWI402609B/zh active
- 2007-09-14 DE DE112007002165T patent/DE112007002165T5/de not_active Ceased
- 2007-09-14 CN CN2007800343813A patent/CN101517483B/zh active Active
- 2007-09-14 KR KR1020127008349A patent/KR20120044387A/ko not_active Application Discontinuation
- 2007-09-14 WO PCT/JP2007/067932 patent/WO2008032819A1/ja active Application Filing
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JP2000029227A (ja) * | 1998-05-07 | 2000-01-28 | Kansai Shingijutsu Kenkyusho:Kk | パターン形成方法および感光性樹脂組成物 |
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Also Published As
Publication number | Publication date |
---|---|
TWI402609B (zh) | 2013-07-21 |
CN101517483B (zh) | 2012-04-18 |
TW200834226A (en) | 2008-08-16 |
KR20120044387A (ko) | 2012-05-07 |
US20090233190A1 (en) | 2009-09-17 |
CN101517483A (zh) | 2009-08-26 |
JP2008070799A (ja) | 2008-03-27 |
KR101153525B1 (ko) | 2012-07-20 |
DE112007002165T5 (de) | 2009-07-23 |
US8026024B2 (en) | 2011-09-27 |
JP5294227B2 (ja) | 2013-09-18 |
KR20090071593A (ko) | 2009-07-01 |
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