WO2022024906A1 - セラミック構造体 - Google Patents
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- WO2022024906A1 WO2022024906A1 PCT/JP2021/027273 JP2021027273W WO2022024906A1 WO 2022024906 A1 WO2022024906 A1 WO 2022024906A1 JP 2021027273 W JP2021027273 W JP 2021027273W WO 2022024906 A1 WO2022024906 A1 WO 2022024906A1
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
- C04B35/5607—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on refractory metal carbides
- C04B35/5611—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on refractory metal carbides based on titanium carbides
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
- C04B35/565—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
- C04B35/58007—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on refractory metal nitrides
- C04B35/58014—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on refractory metal nitrides based on titanium nitrides, e.g. TiAlON
- C04B35/58021—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on refractory metal nitrides based on titanium nitrides, e.g. TiAlON based on titanium carbonitrides
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
- H01B5/16—Non-insulated conductors or conductive bodies characterised by their form comprising conductive material in insulating or poorly conductive material, e.g. conductive rubber
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
Definitions
- This disclosure relates to a ceramic structure.
- Patent Document 1 discloses a semi-conductive sheet made of a polymer blend of polyimide and polyaniline in a doped state. Patent Document 1 describes that the surface resistivity of one surface of the semi-conductive sheet is at least 10 times the surface resistivity of the other surface.
- the ceramic structure according to the present disclosure contains silicon carbide, silicon carbide, titanium carbide or titanium carbide as a main component, and has a first main surface and a second main surface facing the first main surface.
- the carbon concentration obtained from the element mapping by the electron probe microanalyzer is higher in the first main surface than in the second main surface.
- (A) is an electron micrograph showing the first main surface of the ceramic structure according to the embodiment of the present disclosure, and (B) is carbon on the first main surface of the ceramic structure according to the embodiment of the present disclosure. It is an electron micrograph showing the distribution.
- (A) is an electron micrograph showing the second main surface of the ceramic structure according to the embodiment of the present disclosure, and (B) is carbon on the second main surface of the ceramic structure according to the embodiment of the present disclosure. It is an electron micrograph showing the distribution.
- the semi-conductive sheet described in Patent Document 1 is formed of a resin. Therefore, it has poor acid resistance, and when it comes into contact with an acid such as sulfuric acid or phosphoric acid, it deteriorates significantly and cannot be used for a long period of time. Therefore, there is a demand for a ceramic structure that has excellent acid resistance, is less likely to deteriorate even when in contact with an acid, and can be used for a long period of time.
- the carbon concentration obtained from the element mapping by the electron probe microanalyzer is higher in the first main surface than in the second main surface. Therefore, according to the present disclosure, it is possible to provide a ceramic structure which has excellent acid resistance and is not easily deteriorated even when in contact with an acid and can be used for a long period of time.
- the ceramic structure according to the present disclosure contains silicon carbide, silicon carbide, titanium carbide or titanium carbide as a main component, and has a first main surface and a second main surface facing the first main surface. Has a surface.
- the ceramic structure according to the present disclosure will be described with reference to FIGS. 1 to 3.
- the ceramic structure 1 contains silicon carbide, silicon carbide, titanium carbide or titanium carbide as a main component.
- the term "main component” refers to a component that accounts for 80% by mass or more in a total of 100% by mass of the components constituting the ceramics.
- the identification of each component contained in the ceramics is performed by an X-ray diffractometer using CuK ⁇ ray, and the content of each component may be determined by, for example, an ICP (Inductively Coupled Plasma) emission spectroscopic analyzer or a fluorescent X-ray analyzer.
- ICP Inductively Coupled Plasma
- the ceramic structure 1 according to the first embodiment has a first main surface 11a and a second main surface 11b facing the first main surface 11a. If the ceramic structure 1 according to the first embodiment contains silicon carbide, silicon carbide, titanium carbide or titanium carbide as a main component as described above, it contains other components used for ceramics. It may be. In the case of ceramics containing silicon carbide or silicon nitride, examples of such other components include boron carbide, carbon, iron, aluminum, titanium, calcium, and sulfur. In the case of ceramics containing titanium carbide or titanium carbide as a main component, tungsten carbide, molybdenum, niobium, tantalum, vanadium, cobalt and the like can be mentioned. In the case of ceramics containing titanium carbide or titanium carbide as a main component, tungsten carbide, molybdenum, niobium, tantalum, vanadium, cobalt and the like can be mentioned.
- the carbon concentration is not uniform.
- the carbon concentration is higher in the first main surface 11a than in the second main surface 11b.
- a portion having a high carbon concentration is indicated by a dot.
- the carbon concentration is obtained from the element mapping by the electron beam microanalyzer.
- Carbon comprises, for example, at least one form selected from the group consisting of graphite, graphene, carbon nanotubes, fullerenes and amorphous carbon.
- Elemental mapping with an electron probe microanalyzer is a method of performing elemental analysis with an energy dispersive X-ray analyzer (EDS). Specifically, it was approximately calculated so that the total concentration would be 100% by the peak intensity ZAF correction method of the elements detected in a predetermined analysis range (for example, the range imaged at 1500 times) by a scanning electron microscope (SEM). It is a method of performing semi-quantitative analysis to obtain the ratio of a predetermined element to the element of the main component.
- the acceleration voltage used in the element mapping is 15 kv.
- the portion having a high carbon concentration is, for example, 0.001% or more 1 with respect to the thickness of the ceramic structure 1 (the length from the first main surface 11a to the second main surface 11b) even if it is deep from the first main surface 11a.
- the depth is about% or less.
- the first main surface 11a is a flat surface.
- the first main surface 11a does not have to be a flat surface, and for example, at least a part of the first main surface 11a may be projected or recessed.
- FIG. 2 shows an embodiment in which at least a part of the first main surface 11a is projected.
- the ceramic structure 2 according to the second embodiment has at least one protruding from the first main surface 11a on at least a part of the first main surface 11a. It has a convex portion 12.
- the convex portion 12 includes a side surface 121 formed so as to protrude from the first main surface 11a, and an upper surface 122 formed at an end portion of the side surface 121.
- the side surface 121 is formed substantially perpendicular to the first main surface 11a.
- the height of the convex portion 12, that is, the length of the side surface 121 is not limited, and is appropriately set according to the use of the ceramic structure 2.
- the convex portion 12 preferably has a height of, for example, about 10% or more and 1000% or less of the thickness of the ceramic structure 2 (the length from the first main surface 11a to the second main surface 11b, the same applies hereinafter). In particular, the height of the convex portion 12 is preferably 20% or more and 80% or less of the thickness of the ceramic structure 2.
- the carbon concentration is not uniform.
- the carbon concentration is higher in the first main surface 11a than in the second main surface 11b, and is higher in at least one of the side surface 121 of the convex portion 12 and the upper surface 122 of the convex portion 12 than the second main surface 11b.
- a portion having a high carbon concentration is indicated by dots.
- the portion of the side surface 121 of the convex portion 12 and the upper surface 122 of the convex portion 12 having a high carbon concentration has a depth of, for example, about 1% with respect to the thickness of the ceramic structure 1 even if it is deep from the side surface 121 and the upper surface 122. ..
- the carbon concentration may be high in the entire convex portion 12.
- the convex portion 12 is provided on the first main surface 11a.
- static electricity can be efficiently removed through the convex portion 12.
- the ceramic structure 3 according to the third embodiment has at least a portion protruding from the first main surface 11a so as to be curved, at least a part of the first main surface 11a. It has one raised portion 13.
- the raised portion 13 projects in a so-called hemispherical shape, unlike the convex portion 12 included in the ceramic structure 2 according to the second embodiment.
- the height of the raised portion 13 is not limited, and is appropriately set according to the use of the ceramic structure 2.
- the raised portion 13 preferably has a height of, for example, about 10% or more and 1000% or less of the thickness of the ceramic structure 3.
- the height of the raised portion 13 is preferably 20% or more and 80% or less of the thickness of the ceramic structure 3.
- the carbon concentration is not uniform.
- the carbon concentration is higher in the first main surface 11a than in the second main surface 11b, and is higher in the wall surface 131 of the raised portion 13 than in the second main surface 11b.
- the portion having a high carbon concentration is indicated by dots.
- the portion of the wall surface 131 of the raised portion 13 having a high carbon concentration is at a depth of, for example, about 1% with respect to the thickness of the ceramic structure 3 even if it is deep from the wall surface 131 of the raised portion 13.
- the carbon concentration may be high in the entire raised portion 13.
- FIG. 3 shows an embodiment in which at least a part of the first main surface 11a is recessed.
- the ceramic structure 4 according to the fourth embodiment has at least one recess 14 recessed in at least a part of the first main surface 11a.
- the recess 14 includes a side surface 141 and a bottom surface 142 formed so as to be buried in the thickness direction (depth direction) of the ceramic structure 4 from the first main surface 11a.
- the side surface 141 is formed substantially perpendicular to the first main surface 11a.
- the depth of the recess 14, that is, the length of the side surface 141 is not limited, and is appropriately set according to the application of the ceramic structure 4.
- the recess 14 preferably has a depth of, for example, about 10% or more and 1000% or less of the thickness of the ceramic structure 4. In particular, the depth of the recess 14 is preferably 20% or more and 80% or less of the thickness of the ceramic structure 4.
- the carbon concentration is not uniform.
- the carbon concentration is higher in the first main surface 11a than in the second main surface 11b, and is higher in at least one of the side surface 141 of the recess 14 and the bottom surface 142 of the recess 14 than the second main surface 11b.
- the portion having a high carbon concentration is indicated by dots.
- the portion of the side surface 141 of the recess 14 and the bottom surface 142 of the recess 14 having a high carbon concentration is at a depth of, for example, about 1% with respect to the thickness of the ceramic structure 4 even if it is deep from the side surface 141 and the bottom surface 142.
- the carbon concentration of at least one of the side surface 141 of the recess 14 and the bottom surface 142 of the recess 14 is higher than that of the second main surface 11b, even if the first main surface 11a is provided with the recess 14, the recess 14 is formed. Static electricity can be efficiently removed through this.
- the ceramic structure 5 according to the fifth embodiment has at least one recessed portion 15 recessed so as to be curved in at least a part of the first main surface 11a. ..
- the recessed portion 15 is recessed in a so-called hemispherical shape, unlike the recessed portion 14 included in the ceramic structure 4 according to the fourth embodiment.
- the depth of the recessed portion 15 is not limited, and is appropriately set according to the use of the ceramic structure 5.
- the recessed portion 15 preferably has a depth of, for example, about 10% or more and 1000% or less of the thickness of the ceramic structure 5.
- the depth of the recessed portion 15 is preferably 20% or more and 80% or less of the thickness of the ceramic structure 5.
- the carbon concentration is not uniform.
- the carbon concentration is higher in the first main surface 11a than in the second main surface 11b, and is higher in the wall surface 151 of the recessed portion 15 than in the second main surface 11b.
- the portion having a high carbon concentration is indicated by dots.
- the portion of the wall surface 151 of the depressed portion 15 having a high carbon concentration is at a depth of, for example, about 1% with respect to the thickness of the ceramic structure 5 even if it is deep from the wall surface 151 of the depressed portion 15.
- the first main surface 11a may be processed such as polishing or cutting, or may be in an unprocessed state. Depending on the use of the ceramic structure according to the present disclosure, for example, it is necessary to remove the generated static electricity.
- the first main surface 11a is preferably a fired surface having cutting marks. When cutting marks are present on the firing surface, many fine gaps are included between the particles existing on the firing surface. As a result, the generated static electricity is efficiently removed through the fine gaps and the carbon adhering to the particles.
- At least one of the 15 wall surfaces 151 should have a carbon count ratio of 0.01 or more to the silicon and titanium counts in the area of interest for element mapping.
- the ratio of the carbon count number to the silicon and titanium count number in the target region of the element mapping on the first main surface 11a or the like is 0.01 or more, the carbon amount (reference molar ratio) in the crystal structure. ) Is saturated, and the electrical resistance value can be significantly reduced.
- the above ratio is preferably 0.03 or more.
- At least one of the 15 wall surfaces 151 should have a reflectance of 15% or less in the wavelength range of 400 nm to 700 nm.
- a ceramic structure can be used as a halation prevention member.
- a halation prevention member when it is used as a halation prevention member in a quality inspection device provided with an optical device such as a CCD camera used for inspecting electronic parts, it is possible to reduce erroneous recognition and malfunction of the quality inspection device.
- At least one of the 15 wall surfaces 151 preferably has a coefficient of variation of reflectance of 0.06 or less in the wavelength range of 400 nm to 700 nm.
- the coefficient of variation of the reflectance in the wavelength range of 400 nm to 700 nm is 0.06 or less on the first main surface 11a or the like, the variation in the absorption rate of the laser light can be suppressed.
- a machined surface with little variation can be obtained.
- At least one of the 15 walls 151 is preferably reduced in reflectance according to a polynomial or linear approximation curve towards wavelengths from 400 nm to 700 nm.
- FIG. 4 is a graph showing the reflectance of the first main surface of the ceramic structure according to the embodiment of the present disclosure in the wavelength range of 400 nm to 700 nm.
- the reflectance shown in FIG. 4 shows the average value of the reflectances of 4 points selected from the first main surface.
- the wavelength interval may be set to every 10 nm in the above wavelength range.
- the approximation function indicating the decrease in reflectance is set by using the graph tool provided in Excel (registered trademark, Microsoft Corporation), and then the correlation coefficient R is calculated. Then, the correlation coefficient R is tested at a significance level of 5% (two-sided probability) using the r table (correlation coefficient test table), and if it is significant, an approximation curve (polypoly approximation curve or polypoly approximation curve) indicating a decrease in reflectance is obtained. Linear approximation curve) is determined.
- the approximate curve (broken line) shown in FIG. 4 is represented by the polynomial shown in FIG. 4, where x is the wavelength and y is the reflectance. Since the coefficient of determination R 2 of this polynomial is 0.7205, the correlation coefficient R is 0.8488, and the number of samples is 16, it becomes significant when the correlation coefficient R is tested at the significance level of 5%.
- such a ceramic structure is used, for example, as an infrared absorbing member, a semiconductor heat treatment member, or the like.
- the ceramic structure according to the present disclosure includes a first main surface 11a, a side surface 121 of a convex portion 12, an upper surface 122 of a convex portion 12, a wall surface 131 of a raised portion 13, a side surface 141 of a concave portion 14, a bottom surface 142 of the concave portion 14, and a depressed portion.
- At least one of the 15 wall surfaces 151 is set as a measurement target surface, and the brightness index L * in the CIE1976L * a * b * color space of this measurement target surface is 43 or less, and the chromaticity index a * is -1 or more and 1 or less.
- the chromaticness index b * is -2 or more and 2 or less.
- the surface to be measured is black, and the tendency of achromatic color becomes stronger. Therefore, such a ceramic structure can suppress color unevenness.
- the color difference ⁇ E * ab may be 0.5 or less (excluding 0) on the measurement target surface. When the color difference ⁇ E * ab is 0.5 or less (excluding 0), the variation in the color tone feeling is reduced. Therefore, such a ceramic structure makes it difficult to visually recognize the variation in color tone, and the commercial value is improved.
- the reflectance, brightness index L *, chromaticity index a * and b * values can be obtained in accordance with JIS Z 8722: 2009.
- a spectrocolor difference meter (NF777 manufactured by Nippon Denshoku Kogyo Co., Ltd. or its successor model) may be used, and the light source may be set to the CIE standard light source D65 and the viewing angle may be set to 2 °.
- ⁇ E * ab may be calculated by using any one of the four selected points as a reference point and calculating the color difference ⁇ E * ab of the other points with respect to the reference point.
- the method for manufacturing the ceramic structure according to the embodiment of the present disclosure is not limited, and is manufactured by, for example, the following procedure.
- silicon carbide, silicon carbide, titanium carbide or titanium carbide powder prepared silicon carbide, silicon carbide, titanium carbide or titanium carbide powder.
- the purity of these powders is not limited. These powders are preferably, for example, having a purity of 99% by mass or more. If necessary, other powders used as raw materials for ceramics may be used.
- coarse-grained powder and fine-grained powder are prepared as silicon carbide powder, and pulverized and mixed with ion-exchanged water and a dispersant by a ball mill or a bead mill for 40 to 60 hours.
- a ball mill or a bead mill for 40 to 60 hours.
- the range of the particle size of the fine granular powder and the coarse granular powder after pulverization and mixing are 0.4 ⁇ m or more and 4 ⁇ m or less and 11 ⁇ m or more and 34 ⁇ m or less.
- a sintering aid composed of boron carbide powder and amorphous carbon powder or phenol resin and a binder were added to and mixed with the obtained slurry, and then spray-dried to carbonize the main component. Obtain granules made of silicon.
- the fine granular powder may be 6% by mass or more and 15% by mass or less, and the coarse granular powder may be 85% by mass or more and 94% by mass or less.
- the binder include acrylic emulsion, polyvinyl alcohol, polyethylene glycol, polyethylene oxide and the like.
- the slurry is spray-granulated to obtain granules, the obtained granules are filled in a desired molding mold, and then pressure is applied to obtain a molded product.
- the molding pressure is not limited, and is, for example, about 78 MPa or more and 128 MPa or less.
- a slurry containing carbon is applied to one main surface of the obtained molded product.
- a carbon-containing spray is sprayed onto one main surface of the molded product.
- the viscosity of the slurry at room temperature is, for example, 210p or more and 290p or less.
- the spray pressure of the spray at room temperature is, for example, 0.1 MPa or more and 0.8 MPa or less.
- the carbon may include, for example, at least one selected from the group consisting of graphite, graphene, carbon nanotubes, fullerenes and amorphous carbon.
- one surface of the molded product Before applying the carbon-containing slurry or spraying the carbon-containing spray, one surface of the molded product may be cut and used as one main surface. By cutting, convex portions, raised portions, concave portions, depressed portions and the like may be formed.
- the slurry containing carbon is not applied to one main surface and the other main surface facing each other.
- One main surface coated with the carbon-containing slurry is referred to as the "first main surface”, and the other main surface is referred to as the "second main surface”.
- the molded product thus obtained is degreased in a nitrogen atmosphere at a temperature of 450 ° C. or higher and 650 ° C. or lower and a holding time of 2 hours or more and 10 hours or less to obtain a degreased body.
- the degreased body is calcined at a temperature of 1800 ° C. or higher and 2200 ° C.
- a ceramic structure according to an embodiment of the present disclosure having a higher carbon concentration on the surface can be obtained.
- FIG. 5 an electron micrograph of the first main surface is shown in FIG. 5, and an electron micrograph of the second main surface is shown in FIG.
- FIG. 5A it can be seen that the ceramic structure according to the embodiment has cutting marks on the first main surface. Such cutting marks are formed by cutting before applying (spraying) carbon, as described above.
- FIG. 6A it can be seen that there are no cutting marks on the second main surface of the ceramic structure according to the embodiment.
- a region exhibiting white color indicates a portion having a high carbon concentration.
- FIG. 6B there is almost no such white region. Therefore, when FIG. 5 (B) and FIG. 6 (B) are compared, it can be seen that the carbon concentration of the first main surface is higher than that of the second main surface.
- the ceramic structure according to the present disclosure is adopted as a member of a device or the like used in an environment where acid resistance is required.
- the ceramic structure according to the present disclosure includes, for example, a clamping jig provided in a cleaning device, a mounting table provided in a plasma processing device, a flange receiving portion, a semiconductor wafer transfer arm and peripheral sliding members, and various parts. It is used as a holding part for fixing.
- the ceramic structure in which at least a part of the first main surface 11a protrudes is particularly a mounting table provided in a plasma processing apparatus, a transfer arm of a semiconductor wafer, and a periphery thereof. It is preferable to use it as a sliding member of.
- the ceramic structure in which at least a part of the first main surface 11a is recessed is particularly adopted as a receiving portion of a flange, a holding portion for fixing each component, and the like. It is good to do it.
- FIGS. 7 and 8 are schematic cross-sectional views showing a mounting table installed inside the processing container of the plasma processing apparatus.
- FIG. 7 shows a case where the lifter pin is raised to support a semiconductor wafer (hereinafter, may be simply referred to as a wafer), and
- FIG. 8 shows a case where the lifter pin is lowered to mount the wafer on an electrostatic chuck.
- the case is shown.
- the plasma processing apparatus (not shown) has an electrically grounded processing container (not shown).
- the processing container has a cylindrical shape and is made of, for example, aluminum.
- the inside of the processing container is a processing space where plasma is generated.
- a mounting table 21 for supporting the wafer W, which is the substrate to be processed, is provided in the processing container.
- the mounting table 21 has a base 22 and an electrostatic chuck 23.
- the base 22 is made of a conductive metal such as aluminum and functions as a lower electrode.
- the electrostatic chuck 23 includes an internal electrode 23b inside the insulator 23a, and a DC power supply 24 is connected to the internal electrode 23b. When a voltage is applied from the DC power supply 24 to the internal electrode 23b, the wafer W is electrostatically adsorbed by the Coulomb force.
- the insulator 23a is made of, for example, ceramics such as aluminum nitride.
- the lifter pin 25 can be inserted from below the base 22 to above the electrostatic chuck 23.
- the wafer W is supported above the electrostatic chuck 23 by raising the lifter pin 25, and is placed on the electrostatic chuck 23 by lowering it.
- a focus ring 26 for improving the uniformity of plasma processing is provided on the outer peripheral side above the mounting table 21.
- the focus ring 26 is made of, for example, single crystal silicon.
- the electrostatic chuck 23 has a mounting surface 23c for mounting the wafer W and a back surface 23d located on the opposite side of the mounting surface 23c.
- the base 22 is made of a conductive metal such as aluminum, functions as a lower electrode, and is bonded to the back surface 23d of the electrostatic chuck 23.
- a gas supply hole for supplying cooling helium gas or the like is provided inside each of the base 22 and the electrostatic chuck 23.
- the gas supply hole is formed by a first through hole 27 formed inside the electrostatic chuck 23 and a second through hole 28 formed inside the base 22 and communicating with the first through hole 27. ..
- the first through hole 27 penetrates from the back surface 23d of the electrostatic chuck 23 to the mounting surface 23c.
- the second through hole 28 penetrates from the back surface of the base 22 to the joint surface with the electrostatic chuck 23.
- the hole diameter of the first through hole 27 is larger than the hole diameter of the second through hole 28.
- the gas sleeve 29 is attached to the base 22 inside the second through hole 28.
- the gas sleeve 29 includes a main body portion 29a and a flange portion 29b connected to the main body portion 29a in the axial direction, and is an example of the member for the plasma processing apparatus of the present disclosure.
- At least the main body 29a of the gas sleeve 29 is formed of, for example, the ceramic structure of the present disclosure.
- the inner peripheral surface of the main body portion 29a is the first main surface
- the outer peripheral surface is the second main surface.
- the gas sleeve 29 is fitted in the second through hole 28 from the lower surface side to the upper surface side of the base 22.
- the gas sleeve 29 has an inner diameter smaller than the hole diameter of the first through hole 27.
- the pin 30 is housed in the first through hole 27 and the gas sleeve 29.
- the outer diameter of the pin 30 is smaller than the inner diameter of each of the first through hole 27 and the gas sleeve 29.
- the electrostatic chuck 23 has a gap CL1 between the outer peripheral surface of the pin 30 and the inner peripheral surface forming the first through hole 27.
- the base 22 has a gap CL2 between the outer peripheral surface of the pin 30 and the inner peripheral surface of the gas sleeve 29.
- the gap CL1 is larger than the gap CL2.
- the internal spaces of the first through hole 27 and the second through hole 28 are narrowed, and the acceleration of electrons generated by the application of a voltage to the electrostatic chuck 23 is suppressed. be able to.
- the acceleration of electrons By suppressing the acceleration of electrons, abnormal discharge in the first through hole 27 and the gas sleeve 29 can be prevented.
- the main body portion 29a is made of the ceramic structure of the present disclosure and the inner peripheral surface of the main body portion 29a is the first main surface, the effect of removing static electricity is enhanced, so that the action of preventing abnormal discharge is improved. ..
- the flange portion 29b is made of the ceramic structure of the present disclosure, and the inner peripheral surface of the flange portion 29b is the first main surface.
- a through hole for the lifter pin for accommodating the lifter pin 25 is provided inside each of the electrostatic chuck 23 and the base 22.
- the lifter pin through hole includes a third through hole 31 formed inside the electrostatic chuck 23 and a fourth through hole 32 formed inside the base 22.
- the hole diameter of the third through hole 31 is larger than the outer diameter of the lifter pin 25 (for example, 0.1 to 0.5 mm larger).
- the hole diameter of the fourth through hole 32 is larger than the hole diameter of the third through hole 31.
- the lifter pin sleeve 33 is fitted inside the fourth through hole 32 from the lower surface side to the upper surface side of the base 22.
- the lifter pin sleeve 33 includes a main body portion 33a and a flange portion 33b connected to the main body portion 33a in the axial direction, and is an example of the member for the plasma processing apparatus of the present disclosure.
- At least the main body 33a of the lifter pin sleeve 33 is formed of, for example, the ceramic structure of the present disclosure.
- the inner peripheral surface of the main body 33a is the first main surface and the outer peripheral surface is the second main surface.
- the main body 33a is formed of the ceramic structure of the present disclosure and the inner peripheral surface of the main body 33a is the first main surface, the effect of removing static electricity is enhanced. Therefore, the action of preventing abnormal discharge is improved. It is further preferable that the flange portion 33b is formed of the ceramic structure of the present disclosure, and the inner peripheral surface of the flange portion 33b is the first main surface.
- the lifter pin 25 is formed of, for example, sapphire.
- the lifter pin 25 has a columnar shape, and the surface on the distal end side that supports the wafer W is a hemispherical curved surface.
- the lifter pin 25 moves up and down in the lifter pin through hole by a drive mechanism (not shown).
- the wafer W has been described as an example of the substrate above, the present invention is not limited to this, and various substrates, printed circuit boards, etc. used for FPD (Flat Panel Display) may be used.
- FPD Full Panel Display
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Abstract
Description
特に、上記比率は、0.03以上であるとよい。
11a 第1主面
11b 第2主面
12 凸部
121 凸部の側面
122 凸部の上面
13 隆起部
131 隆起部の壁面
14 凹部
141 凹部の側面
142 凹部の底面
15 陥没部
151 陥没部の壁面
21 載置台
22 基台
23 静電チャック
24 直流電源
25 リフターピン
26 フォーカスリング
27 第1貫通孔
28 第2貫通孔
29 ガス用スリーブ
30 ピン
31 第3貫通孔
32 第4貫通孔
33 リフターピン用スリーブ
Claims (14)
- 炭化珪素、炭窒化珪素、炭化チタンまたは炭窒化チタンを主成分として含有し、
第1主面と、第1主面と対向する第2主面とを有し、
電子線マイクロアナライザーによる元素マッピングから求められる炭素濃度が、前記第2主面よりも前記第1主面の方が高い、セラミック構造体。 - 前記第1主面が切削痕を有する焼成面である、請求項1に記載のセラミック構造体。
- 前記第1主面の少なくとも一部に、前記第1主面から突出する少なくとも1つの凸部をさらに有し、
前記炭素濃度が、前記第2主面よりも前記凸部の側面および前記凸部の上面の少なくとも一方の方が高い、請求項1または2に記載のセラミック構造体。 - 前記第1主面の少なくとも一部に、前記第1主面から湾曲するように突出する少なくとも1つの隆起部をさらに有し、
前記炭素濃度が、前記第2主面よりも前記隆起部の壁面の方が高い、請求項1~3のいずれかに記載のセラミック構造体。 - 前記第1主面の少なくとも一部に窪んだ少なくとも1つの凹部をさらに有し、
前記炭素濃度が、前記第2主面よりも前記凹部の側面および前記凹部の底面の少なくとも一方の方が高い、請求項1~4のいずれかに記載のセラミック構造体。 - 前記第1主面の少なくとも一部に湾曲するように窪んだ少なくとも1つの陥没部をさらに有し、
前記炭素濃度が、前記第2主面よりも前記陥没部の壁面の方が高い、請求項1~5のいずれかに記載のセラミック構造体。 - 前記第1主面、前記凸部の側面、前記凸部の上面、前記隆起部の壁面、前記凹部の側面、前記凹部の底面および前記陥没部の壁面の少なくとも1つは、前記元素マッピングの対象領域内の珪素およびチタンのカウント数に対する炭素のカウント数の比率が0.01以上である、請求項1~6のいずれかに記載のセラミック構造体。
- 前記第1主面、前記凸部の側面、前記凸部の上面、前記隆起部の壁面、前記凹部の側面、前記凹部の底面および前記陥没部の壁面の少なくとも1つは、400nm~700nmの波長域における反射率が15%以下である、請求項1~7のいずれかに記載のセラミック構造体。
- 前記第1主面、前記凸部の側面、前記凸部の上面、前記隆起部の壁面、前記凹部の側面、前記凹部の底面および前記陥没部の壁面の少なくとも1つは、400nm~700nmの波長域における反射率の変動係数が0.06以下である、請求項1~8のいずれかに記載のセラミック構造体。
- 前記第1主面、前記凸部の側面、前記凸部の上面、前記隆起部の壁面、前記凹部の側面、前記凹部の底面および前記陥没部の壁面の少なくとも1つは、400nmから700nmまでの波長に向かって多項式近似曲線または線形近似曲線に従って、反射率が減少する、請求項1~9のいずれかに記載のセラミック構造体。
- 前記第1主面、前記凸部の側面、前記凸部の上面、前記隆起部の壁面、前記凹部の側面、前記凹部の底面および前記陥没部の壁面の少なくとも1つを測定対象面とし、この測定対象面のCIE1976L*a*b*色空間における明度指数L*が43以下であり、クロマティクネス指数a*が-1以上1以下であり、クロマティクネス指数b*が-2以上2以下である、請求項1~10のいずれかに記載のセラミック構造体。
- 前記測定対象面の色差ΔE*abが、0.5以下(但し0を除く)である、請求項11に記載のセラミック構造体。
- 前記炭素が、グラファイト、グラフェン、カーボンナノチューブ、フラーレンおよびアモルファスカーボンからなる群より選択される少なくとも1種の形態を含む、請求項1~12のいずれかに記載のセラミック構造体。
- 請求項1~13のいずれかに記載のセラミック構造体からなるプラズマ処理装置用部材。
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CN202180060914.5A CN116194423A (zh) | 2020-07-29 | 2021-07-21 | 陶瓷结构体 |
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JP2001223256A (ja) * | 2000-02-08 | 2001-08-17 | Ibiden Co Ltd | 半導体製造・検査装置用セラミック基板 |
WO2019074843A1 (en) * | 2017-10-09 | 2019-04-18 | Applied Materials, Inc. | ELECTROSTATIC CHUCK FOR SUBSTRATE TREATMENT WITHOUT DAMAGE |
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GB1371513A (ja) * | 1971-07-13 | 1974-10-23 | ||
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JP3467345B2 (ja) | 1995-03-27 | 2003-11-17 | 日東電工株式会社 | 半導電性樹脂シート及びその製造方法 |
EP1394136A1 (en) * | 2001-04-12 | 2004-03-03 | Ibiden Co., Ltd. | Ceramic bonded body and its producing method, and ceramic structure for semiconductor wafer |
JP2003115427A (ja) * | 2002-06-14 | 2003-04-18 | Ibiden Co Ltd | 半導体製造・検査装置用セラミック基板 |
JP2006232590A (ja) * | 2005-02-23 | 2006-09-07 | Ngk Insulators Ltd | セラミック構造体の製造方法 |
CN101879480B (zh) * | 2010-07-12 | 2013-07-31 | 无锡安固斯建筑科技有限公司 | 宽极板静电除尘模块 |
CN104926312B (zh) * | 2015-06-29 | 2019-04-26 | 莱芜亚赛陶瓷技术有限公司 | 一种高热导率无压烧结碳化硅陶瓷材料及其制备方法 |
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- 2021-07-21 CN CN202180060914.5A patent/CN116194423A/zh active Pending
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JP2001223256A (ja) * | 2000-02-08 | 2001-08-17 | Ibiden Co Ltd | 半導体製造・検査装置用セラミック基板 |
WO2019074843A1 (en) * | 2017-10-09 | 2019-04-18 | Applied Materials, Inc. | ELECTROSTATIC CHUCK FOR SUBSTRATE TREATMENT WITHOUT DAMAGE |
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