WO2006038538A1 - スパッタリングターゲット用ターゲット材の製造方法 - Google Patents
スパッタリングターゲット用ターゲット材の製造方法 Download PDFInfo
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- WO2006038538A1 WO2006038538A1 PCT/JP2005/018041 JP2005018041W WO2006038538A1 WO 2006038538 A1 WO2006038538 A1 WO 2006038538A1 JP 2005018041 W JP2005018041 W JP 2005018041W WO 2006038538 A1 WO2006038538 A1 WO 2006038538A1
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
- C23C14/3407—Cathode assembly for sputtering apparatus, e.g. Target
- C23C14/3414—Metallurgical or chemical aspects of target preparation, e.g. casting, powder metallurgy
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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
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- C04B35/453—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zinc, tin, or bismuth oxides or solid solutions thereof with other oxides, e.g. zincates, stannates or bismuthates
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- C04B35/453—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zinc, tin, or bismuth oxides or solid solutions thereof with other oxides, e.g. zincates, stannates or bismuthates
- C04B35/457—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zinc, tin, or bismuth oxides or solid solutions thereof with other oxides, e.g. zincates, stannates or bismuthates based on tin oxides or stannates
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- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/54—Controlling or regulating the coating process
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/54—Controlling or regulating the coating process
- C23C14/548—Controlling the composition
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
- F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
- F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor
- F27B9/2407—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor the conveyor being constituted by rollers (roller hearth furnace)
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/36—Arrangements of heating devices
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- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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Definitions
- the present invention relates to a method for producing a target material for a sputtering target. More specifically, the present invention relates to a method for continuously producing the target material.
- a sputtering method is known as one of thin film forming methods.
- Examples of the thin film formed by the sputtering method include a thin film of indium oxide and oxide (ITO; Indium Tin Oxide) mainly composed of oxide oxide. Since this ITO thin film has both high conductivity and visible light transmission characteristics, it is widely used in various applications such as transparent electrodes for flat panel displays and anti-condensation heating films for window glass. In particular, in the field of flat panel displays such as liquid crystal display devices, in recent years, the size of displays has increased significantly, and along with this, the sputtering target used for the production of ITO thin films has also tended to increase in size. The target materials are becoming larger.
- a target material for a sputtering target used for the production of such an ITO thin film is usually compression-molded by adding a binder to a raw material powder as desired, and the resulting molded body is degreased as necessary. It is manufactured by the so-called powder metallurgy method, in which a sintered body is obtained by firing.
- the batch furnace is provided with heating means such as a heater 17 on the outer edge of the furnace, and the object to be fired 21 is placed in the furnace every time. It is a discontinuous furnace that is placed and fired.
- the object to be fired 21 is placed on a fired board 19 called a shelf board and the sequentially assembled ones are placed in the furnace and fired. .
- Patent Document 1 Examination of degreasing conditions before firing to solve these problems (see Patent Document 1), use of fired plates during firing and examination of the shape of the fired plates (see Patent Document 2), examination of raw material powder to be used and Various studies have been made such as examination of firing conditions such as temperature and firing atmosphere (see Patent Document 3), how to assemble the shelf in the furnace, and examination of the shape of the shelf.
- the sputtering target and its target material are also required to have a low oxygen partial pressure dependency during sputtering with respect to the specific resistance of the thin film formed by sputtering.
- the specific resistance of the formed thin film changes depending on the oxygen partial pressure mixed with an inert gas such as argon, and the oxygen content that minimizes the specific resistance is known.
- Sputtering is performed by controlling the amount of oxygen introduced into the sputtering apparatus so that the pressure is maintained.
- Patent Document 1 JP-A-10-330169
- Patent Document 2 Japanese Patent Laid-Open No. 2001-122668
- Patent Document 3 Japanese Patent Laid-Open No. 09-228036
- An object of the present invention is to provide a method for producing a high-quality target material for a sputtering target in a short time with high production efficiency.
- Another object of the present invention is to provide a method for producing a target material for a sputtering target that has a small oxygen partial pressure dependency during sputtering with respect to the specific resistance of a thin film formed by sputtering.
- a method for producing a target material according to the present invention is a method for producing a target material for a sputtering target by a powder metallurgy method, wherein the material to be fired is one side of the material to be fired after molding. It is characterized by having a heating step. Desirably, the heating step is a step of heating the body to be fired so that both ends have a temperature difference for each body to be fired.
- the objects to be fired are simultaneously straddled two or more adjacent regions set at different temperatures. It is preferable that the process is heated while
- it is a step of heating one to-be-fired body while conveying the to-be-fired body so as to straddle two or more adjacent regions set at different temperatures.
- the temperature of each of the two or more regions is transported within a range of 10 to 500 ° C as compared with the temperature of the regions adjacent to each other. It is set so as to increase in order according to the direction, and within these two or more areas
- the conveying speed of the fired body passing through is preferably in the range of 1 to 50 mmZmin. Further, in the heating step, it is preferable that a set temperature of a region having the lowest temperature among the two or more regions is in a range of room temperature to 800 ° C.
- cooling for cooling the to-be-fired body so that both ends have a temperature difference in addition to the heating step, for each one to-be-fired body after the heating step, cooling for cooling the to-be-fired body so that both ends have a temperature difference. It is desirable to have a process.
- the object to be fired is simultaneously straddled across two or more adjacent regions set at different temperatures.
- the cooling process is preferred
- the object to be fired may be cooled while being transported so as to simultaneously straddle two or more adjacent regions set at different temperatures. More preferred.
- the temperature of each of the two or more regions is transported within a range of 10 to 500 ° C compared to the temperature of the regions adjacent to each other. It is preferable that the temperature is set so as to decrease sequentially along the direction, and the conveyance speed of the fired body passing through these two or more regions is in the range of 1 to 50 mmZmin. Furthermore, in the cooling step, it is preferable that the set temperature in the highest temperature region of the two or more regions is in the range of 1300 to 1800 ° C! /.
- the heating step and the cooling step which are desired to be performed in a continuous furnace, are performed in a continuous furnace.
- the continuous furnace is preferably provided with heating means at the upper and lower sides with the conveying path of the body to be fired as a force S, and more preferably a roller hearth kiln.
- the flow rate of oxygen introduced into the continuous furnace is preferably in the range of 0.1 to 500 m 3 Zh.
- the target material is preferably a transparent conductive film forming target material.
- one side force in the heating step, for each object to be fired, one side force can be sequentially heated and sintered by providing a temperature difference at both ends when the temperature is raised. Also, when manufacturing so-called long objects and large target materials, sintering occurs sequentially from one side of the body to be fired, and shrinkage due to sintering of the body to be fired is also sequentially performed, so that it is finally obtained.
- the density of the target material can be improved, density unevenness can be improved, and warpage and cracking can be prevented.
- the object to be fired in order to perform such a baking treatment, is heated while being transported in regions set at different temperatures, or is heated and cooled. We found that a loose continuous furnace is good. Further, in this method, since the firing treatment can be performed continuously, the firing treatment time required per unit quantity of the target material can be shortened, and a high-quality target material can be produced with high production efficiency.
- FIG. 1-1 is a schematic cross-sectional view of a roller hearth kiln.
- Fig. 12 is a cross-sectional view taken along line I-1 'of Fig. 11.
- FIG. 2 shows a schematic view of a batch furnace.
- FIG. 3 is a temperature profile diagram of the baking treatment of Example 1.
- FIG. 4 is a temperature profile diagram of the baking treatment of Examples 2 and 3.
- FIG. 5 is a temperature profile diagram of the baking treatment of Example 4.
- FIG. 6 is a temperature profile diagram of the baking treatment of Example 5.
- FIG. 7 is a graph showing the relationship between the specific resistance of a thin film formed by sputtering using the target materials obtained in Example 6 and Comparative Example 8 and the oxygen partial pressure during sputtering.
- the method for producing a target material according to the present invention is a method for producing a target material for a sputtering target by powder metallurgy, and more desirably, the target material is produced through a specific cooling step in addition to the specific heating step. It is characterized by that. That is, in the powder metallurgy method, generally, a raw material powder is optionally compression-molded with a binder, and the obtained molded body is degreased as necessary, and then the molded body (hereinafter referred to as a fired body).
- a specific heating step desirably a specific cooling step in addition to the heating step, is characterized in the present invention.
- the raw material powder may be subjected to calcination and classification as required, and the subsequent mixing of the raw material powder can be performed by, for example, a ball mill.
- the mixed raw material powder is filled into a mold and compression molded to produce a molded body, which may be degreased in an atmospheric atmosphere or an oxygen atmosphere to obtain a sintered body.
- Raw material powder mixed in a filtration type mold made of a water-insoluble material to obtain a compact by draining water from the ceramic raw material slurry under reduced pressure, as in the filtration type molding method described in Japanese Unexamined Patent Publication No. 11-286002
- a slurry made of ion-exchanged water and an organic additive is injected, and water in the slurry is drained under reduced pressure to produce a molded body.
- the molded body is dried and degreased to obtain a fired body.
- the molded body is degreased as necessary and is not degreased! In some cases, the molded body is left as it is. A body to be fired. Moreover, degreasing can also be performed in the continuous furnace mentioned later.
- the present invention includes a heating step for each of the thus-obtained objects to be fired, by subjecting the object to be fired to one-side force sintering.
- the heating step includes a step of heating the fired body so that both ends of the fired body have a temperature difference for each of the fired bodies. More specifically,
- a step of heating the object to be fired while simultaneously straddling two or more adjacent regions set at different temperatures can be mentioned.
- the fired body is heated while being transported so as to straddle two or more adjacent regions set at different temperatures.
- a process is mentioned more preferably.
- the fired body when the fired body is heated while being transported across the two or more regions, the fired body is transported in the transport direction for each of the fired bodies.
- Side force can be sequentially heated and sintered.
- sintering occurs sequentially from the end of the sintered body on the conveying direction side, and shrinkage due to sintering of the sintered body is also sequentially performed.
- the density of the target material finally obtained can be improved, density unevenness can be improved, and warpage and cracking can be prevented.
- the present invention particularly relates to a long target material in which the object to be fired straddles three or more regions in the heating step (for example, a length after firing of 500 mm to 1000 mm, a width of The present invention can be suitably applied to the production of target materials having a thickness of 10 mm to 500 mm and a thickness of 3 mm to 30 mm.
- the number of regions in the heating step is not particularly limited as long as it is 2 or more, but preferably 3 or more.
- the upper limit of the number of regions that the fired body can straddle can be set as appropriate according to the size of the target material to be obtained. However, in the normal case, it is possible to handle target materials of various sizes with 5 or less. It is.
- each region in the heating step in the heating step may be the same as or different from the other regions for each region, and the size and use of the object to be fired
- the force that can be determined as appropriate depending on the size of the furnace to be used and the number of areas to be installed. ⁇ 490mm Is desirable.
- the temperature of each of the two or more regions in the heating step is usually 10 to 500 ° C compared to the temperature of the region adjacent to each other among them.
- the temperature is preferably set to 50 to 400 ° C, more preferably in the range of 100 to 350 ° C, so as to increase sequentially in the direction of conveyance, and within these two or more regions.
- the conveyance speed of the object to be fired that passes through is usually in the range of 1 to 50 mmZmin.
- the temperature of the lowest temperature region among the two or more regions is usually in the range of room temperature to 800 ° C.
- the temperature force of two or more regions adjacent to each other is set so as to increase sequentially toward the conveying direction of the object to be fired at a temperature within the above range, and passes through these regions.
- the conveyance speed of the object to be fired is a speed within the above range
- one side of the object to be fired in other words, It is heated from the end of the body to be fired in the conveyance direction.
- the end force sintering on one side of the body to be fired in other words, the side of the body to be fired in the conveying direction proceeds, but also in this case, the shrinkage of the body to be fired proceeds more smoothly and cracks occur. This is desirable because there is no warping or warping.
- the widest surface shape of the body to be fired has a rectangular or other aspect ratio, place the body to be fired so that the longer side of the surface is parallel to the transport direction. Good.
- the set temperature of each region of the two or more regions in the heating process is set at a substantially intermediate point with respect to the length of each region in the conveyance direction (the length in the longitudinal direction of each region) for each region. It is determined by a temperature detection device such as a thermocouple.
- the temperature between the temperature detecting devices installed in the areas adjacent to each other is usually from 0.02 to: Lie / mm, preferably from 0.11 to 0.89 ° C / mm, more preferably. U, adjusted to rise with a harm ij of 0.22 to 0.78 ° C / mm.
- the to-be-fired body after the heating step in addition to the heating step, for each one to-be-fired body after the heating step, the to-be-fired so that both ends thereof have a temperature difference. It is preferable to have a cooling process to cool the body.
- the cooling step is performed per one body to be fired after the heating step.
- the process is a step of cooling the object to be fired while simultaneously straddling two or more adjacent regions set at different temperatures.
- the object to be fired may be cooled while being transported so as to simultaneously straddle two or more adjacent regions set at different temperatures. More preferred.
- the sintered body after being subjected to the heating process that is, the sintered body, can be sequentially cooled for each sintered body in terms of the end force on the conveying direction side.
- the temperature of each of the two or more regions is usually 10 to 500 ° C., preferably 50 to 400 ° C., compared to the temperature of the regions adjacent to each other. More preferably, it is set so that it gradually decreases in the direction of conveyance within the range of 100 to 350 ° C, and the conveyance speed of the fired body passing through these two or more regions is usually l is in the range of 50mmZmin.
- the temperature of the highest temperature region among the two or more regions is normally in the range of 1300 to 1800 ° C.
- the relationship between the set temperature of each region, the temperature difference between adjacent regions, and the conveyance speed will be described as an example when the number of regions is three.
- At least two of the regions d to f are adjacent to each other so as to simultaneously straddle at least two of the regions d to f. It is cooled while being transported between these areas at a transport speed within the above range.
- the temperature forces of two or more adjacent areas are set so as to decrease sequentially in the above range within the above range, and the objects passing through these areas are set.
- the conveyance speed of the fired body is set within the above range, when the fired body passes through these regions, the end force on one side of the fired body, in other words, the transport direction side of the fired body is also reduced.
- the transport direction side of the fired body is also reduced.
- cracks and warping do not occur in this case.
- production volume per unit time is expected to increase, which is preferable in terms of production efficiency.
- the present invention particularly relates to a long target material in which the object to be fired straddles three or more regions in the cooling step (for example, a length after firing of 500 mm to 1000 mm, a width of The present invention can be suitably applied to the production of target materials having a thickness of 10 mm to 500 mm and a thickness of 3 mm to 30 mm.
- the number of regions in the cooling step is not particularly limited as long as it is 2 or more, but preferably 3 or more.
- the upper limit of the number of regions that the fired body can straddle can be set appropriately according to the size of the target material to be obtained. It is.
- each region in the cooling step in the cooling step may be the same as or different from the other regions for each region, Force that can be determined appropriately depending on the size, number of areas to be arranged, etc. Usually 300mm to 490mm is desirable.
- the set temperature of each region of the two or more regions in the cooling process is set at a substantially intermediate point with respect to the length of each region in the transport direction (the length in the longitudinal direction of each region). It is determined by a temperature detection device such as a thermocouple. At this time, the temperature between the temperature detecting devices installed in the areas adjacent to each other is usually from 0.02 to: Lie / mm, preferably from 0.11 to 0.89 ° C / mm, more preferably. It is desirable that U is set to descend with a harm ij of 0.22 to 0.78 ° C / mm.
- the method for producing a target material of the present invention if necessary, between the heating step and the cooling step, and when the heating step is performed a plurality of times step by step, between each heating step.
- a heat insulation process can also be provided.
- the temperature in the region of the most recent heating process is maintained.
- the length and number of regions in the heat retaining step can be appropriately determined depending on the size of the object to be fired, the size of the furnace to be used, the total number of regions to be disposed, and the like.
- the target material that can be produced by the method for producing a target material of the present invention is not particularly limited as long as it can be produced by a powder metallurgy method.
- the target material include oxides (ITO: In ⁇ —SnO), In O—ZnO, SnO—SbO, ZnO—AlO, etc., mainly composed of indium oxide and tin oxide. Cerami
- Sintered target materials Metal target materials such as W, Mo, A1 and Ti.
- the ITO target material is more preferable than the ceramic sintered body target material in terms of the point power that can achieve the effects of the present invention more effectively.
- the ITO target is usually 1 to 35 wt.% In indium oxide (In 2 O 3).
- the heating step and the cooling step which are preferably performed in a continuous furnace, are performed in a continuous furnace.
- the continuous furnace means a furnace that can continuously heat the object to be fired, or a furnace that can continuously heat and cool the object to be fired. , Pusher furnace, mesh belt furnace and the like.
- the continuous furnace is provided with a conveying path for the body to be fired. It is more preferable that the roller hearth kiln is preferably provided with heating means in the vertical direction.
- the thermocouples may be provided in the vertical direction, and temperature detection and temperature control may be performed in the vertical direction.
- air, oxygen, nitrogen, hydrogen, or the like can be introduced into the continuous furnace.
- oxygen is introduced into the continuous furnace, and the heating step and / or the cooling step are performed in an oxygen atmosphere. It is desirable from the viewpoint of improving the density of the body to be fired.
- the flow rate of oxygen introduced into the continuous furnace is usually in the range of 0.1 to 500 m 3 Zh.
- a reducing atmosphere such as hydrogen is introduced into the continuous furnace, and the heating step and / or the cooling step are performed in the reducing atmosphere. It is also desirable to have a viewpoint to prevent metal acidification.
- Roller hearth kiln is a kind of continuous furnace that can provide a preheating zone, heating zone, heat insulation zone, cooling zone, etc. depending on the set temperature, and that can execute a specific temperature profile.
- Fig. 1-1 shows a schematic cross-sectional view of an example of a roller hearth kiln that can be used in the present invention.
- Fig. 1 In Fig. 1, the to-be-fired body 3 to be fired in roller hearth kiln 1 is preheated, heated, kept warm while being conveyed in the direction of the arrow by the rotation of a plurality of rollers from roller 7 to roller 7 '. It is cooled and fired.
- the to-be-fired body 3 may be placed on the firing plate 2 as shown.
- the force that is a one-stage embodiment in which the object 3 is placed on the fired plate 2 may be further stacked in two or three stages.
- FIG. 12 is a sectional view taken along line II of the roller hearth kiln shown in FIG. Heaters 9 and 9 ′ are provided on the upper and lower sides of the conveyance path on which the fired body 3 placed on 2 is conveyed by the rollers 7. The temperature in the furnace is adjusted to the set temperature by these heaters 9 and 9 '.
- the to-be-fired body 3 is partitioned by the partition 11, and two or more adjacent regions set at different temperatures by the heaters 9 and 9 ′ (hereinafter simply referred to as “the region”).
- the zone is sometimes heated or cooled while being transported across multiple zones by the rotation of several rollers 7 (for example, in Fig. 1-1, it is transported across four areas simultaneously). ) 0
- gas such as oxygen can be introduced and discharged from the gas introduction / exhaust ports 5 and 5 ′, and firing can be performed in a gas atmosphere.
- deoxidized ITO fired body (adding 10% by weight of SnO to In O, flowing 100% oxygen gas through the furnace)
- the firing density (g / cm 3 ) and warpage (mm) were determined by the following methods, and the presence or absence of cracks was visually evaluated.
- the firing density was calculated by cutting the obtained ITO target material into a substantially rectangular parallelepiped, surface-processing, measuring the weight, and dividing this weight by the volume of the rectangular parallelepiped after the surface-processing.
- the volume of the rectangular parallelepiped after chamfering is vernier caliper (Mitutoyo, M type standard caliper N1000 IS B 7507)) and a micrometer (Mitutoyo, count outer micrometer M820-25 (JI SB 7502)) was used for the calculation.
- the obtained ITO target material is placed on a flat plate, and the maximum value of the space between the flat plate and the ITO target material is determined as a gap gauge (manufactured by Nagai Gauge Manufacturing Co., Ltd., JIS Skimmergeshi ', JIS B 7524 -1992). It measured using.
- the number of fired sheets per unit time is “the number of fired bodies that enter the furnace (sheets) (that is, the total length of the furnace (mm) / the length of the fired plate (mm)) / the actual firing time. (Time) ”.
- the firing conditions were changed to the conditions shown in Table 1 and Table 3, respectively (the temperature profile is shown in Fig. 4.
- the temperature profile is common to Examples 2 and 3.)
- a target material was obtained.
- the actual firing time was 16 hours, the same as the set firing time.
- the firing density and warpage were determined in the same manner as in Example 1, and the presence or absence of cracks was evaluated. Furthermore, the theoretical calcined weight for 10 days was determined.
- Example 4 Example 4
- Table 1 and Table 5 Example 5 with 665mm X 235mm X 15mm, 11.4kg) mounted on a fired plate (800mm X 300mm X 25mm)
- a fired plate 800mm X 300mm X 25mm
- the actual firing time was 21.4 hours, the same as the set firing time.
- the firing density and warpage were determined in the same manner as in Example 1, and the presence or absence of cracks was evaluated. Furthermore, the theoretical calcined weight for 10 days was determined.
- the ITO target material obtained in Example 4 was cut out and joined to a copper backing plate to produce an ITO sputtering target having a diameter of 6 inches and a thickness of 4 mm.
- sccm is standard cc / min and means the gas flow rate converted under the conditions of 0 ° C and latm.
- the firing density and warpage were determined in the same manner as in Example 1, and the presence or absence of cracks was evaluated.
- the theoretical calcined weight for 10 days was calculated by the following formula.
- An ITO target material was obtained in the same manner as in Comparative Example 1 except that firing was performed using the firing pattern shown below.
- the set firing time at this time was 16 hours, and the actual firing time was 36.5 hours.
- the firing density and warpage were determined in the same manner as in Comparative Example 1, and the presence or absence of cracks was evaluated.
- the theoretical firing weight for 10 days was set to 0 because all of the obtained ITO target materials were cracked.
- the firing density and warpage were determined in the same manner as in Comparative Example 1, and the presence or absence of cracks was evaluated.
- the theoretical firing weight for 10 days was set to 0 because all of the obtained ITO target materials were cracked.
- An ITO target material was obtained in the same manner as in Comparative Example 1 except that firing was performed using the firing pattern shown below.
- the set firing time at this time was 54.3 hours, and the actual firing time was 78.3 hours.
- the firing density and warpage were determined in the same manner as in Comparative Example 1, and the presence or absence of cracks was evaluated.
- An ITO target material was obtained in the same manner as in Comparative Example 4 except that the oxygen gas was not flowed into the furnace and the air was flowed (flow rate: 1.0 m 3 / h).
- the set firing time at this time was 54.3 hours, and the actual firing time was 78.3 hours.
- the ITO target was the same as Comparative Example 1 except that it was fired using the firing pattern shown below.
- the material was obtained.
- the set firing time at this time was 62.9 hours, and the actual firing time was 84 hours.
- the firing density and warpage were determined in the same manner as in Comparative Example 1, and the presence or absence of cracks was evaluated.
- An ITO target material was obtained in the same manner as in Comparative Example 1 except that firing was performed using the firing pattern shown below.
- the set firing time at this time was 63.9 hours, and the actual firing time was 85 hours.
- the firing density and warpage were determined in the same manner as in Comparative Example 1, and the presence or absence of cracks was evaluated.
- An ITO sputtering target was prepared and sputtered in the same manner as in Example 6 except that the ITO target material obtained in Comparative Example 6 was used, and the specific resistance of the formed ITO thin film was measured. The dependence of oxygen partial pressure during sputtering of the ITO target material on the specific resistance was investigated.
- an ITO target material manufactured using a notch furnace is used to form a thin film with a specific resistance of 5. ⁇ 10 ” 4 ⁇ 'cm or less.
- the amount of oxygen introduced during sputtering is low. It can be said that there is no problem even if it varies in the range of about 0.3 to 1.1 sccm.
- the ITO target material manufactured using a continuous furnace is more dependent on the partial pressure of oxygen during sputtering relative to the specific resistance of a thin film formed by sputtering than the ITO target material manufactured using a batch furnace. It is clear that the continuous furnace that sinters one-sided force of the material to be fired is less suitable for the production of sputtering target materials than the batch furnace.
- a target material for a sputtering target in particular, a so-called long object or a large target material can be manufactured with high quality and in a short time in accordance with production efficiency. Therefore, the present invention is useful for the sputtering target manufacturing industry.
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Abstract
Description
Claims
Priority Applications (2)
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CN2005800236742A CN1984855B (zh) | 2004-10-01 | 2005-09-29 | 溅射靶用靶材的制造方法 |
JP2006539257A JPWO2006038538A1 (ja) | 2004-10-01 | 2005-09-29 | スパッタリングターゲット用ターゲット材の製造方法 |
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JP2004290465 | 2004-10-01 | ||
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JP (1) | JPWO2006038538A1 (ja) |
KR (2) | KR100873088B1 (ja) |
CN (1) | CN1984855B (ja) |
TW (1) | TW200611989A (ja) |
WO (1) | WO2006038538A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014122120A1 (en) * | 2013-02-05 | 2014-08-14 | Soleras Advanced Coatings Bvba | (ga) zn sn oxide sputtering target |
CN108097530A (zh) * | 2018-01-19 | 2018-06-01 | 广西晶联光电材料有限责任公司 | 一种平面靶材背面金属化设备及方法 |
CN115677361A (zh) * | 2022-10-11 | 2023-02-03 | 广西晶联光电材料有限责任公司 | 一种ito靶材的常压烧结方法 |
Families Citing this family (5)
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JP2017179595A (ja) * | 2016-03-28 | 2017-10-05 | 日立金属株式会社 | スパッタリングターゲット材およびその製造方法 |
CN107614739B (zh) * | 2016-05-12 | 2020-08-14 | 株式会社广筑 | 圆柱形溅射靶材的焙烧装置以及焙烧方法 |
CN106966700A (zh) * | 2017-03-09 | 2017-07-21 | 郑州大学 | 一种氧化铟锡烧结体的短流程制备工艺 |
CN108273994B (zh) * | 2018-03-30 | 2024-04-19 | 江苏理成科技有限公司 | 高密度钼铌合金靶材的制备装置和方法 |
CN109877327B (zh) * | 2019-02-27 | 2024-01-23 | 杭州东江摩擦材料有限公司 | 一种粉末冶金铜基摩擦块及其制备方法 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH1121170A (ja) * | 1997-07-03 | 1999-01-26 | Mitsubishi Materials Corp | Ito焼結体の焼結装置 |
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JP2522847Y2 (ja) * | 1990-11-16 | 1997-01-16 | トヨタ自動車株式会社 | 連続式焼結炉 |
US5433901A (en) * | 1993-02-11 | 1995-07-18 | Vesuvius Crucible Company | Method of manufacturing an ITO sintered body |
JP3011366B2 (ja) * | 1995-10-26 | 2000-02-21 | 株式会社ノリタケカンパニーリミテド | 膜形成素材を含む基板の焼成方法および装置 |
-
2005
- 2005-09-29 KR KR1020077000142A patent/KR100873088B1/ko not_active IP Right Cessation
- 2005-09-29 CN CN2005800236742A patent/CN1984855B/zh not_active Expired - Fee Related
- 2005-09-29 JP JP2006539257A patent/JPWO2006038538A1/ja active Pending
- 2005-09-29 KR KR1020087018144A patent/KR20080075926A/ko not_active Application Discontinuation
- 2005-09-29 WO PCT/JP2005/018041 patent/WO2006038538A1/ja active Application Filing
- 2005-09-30 TW TW094134221A patent/TW200611989A/zh unknown
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH1121170A (ja) * | 1997-07-03 | 1999-01-26 | Mitsubishi Materials Corp | Ito焼結体の焼結装置 |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014122120A1 (en) * | 2013-02-05 | 2014-08-14 | Soleras Advanced Coatings Bvba | (ga) zn sn oxide sputtering target |
US9758856B2 (en) | 2013-02-05 | 2017-09-12 | Soleras Advanced Coatings Bvba | (Ga) Zn Sn oxide sputtering target |
CN108097530A (zh) * | 2018-01-19 | 2018-06-01 | 广西晶联光电材料有限责任公司 | 一种平面靶材背面金属化设备及方法 |
CN108097530B (zh) * | 2018-01-19 | 2023-12-29 | 广西晶联光电材料有限责任公司 | 一种平面靶材背面金属化设备及方法 |
CN115677361A (zh) * | 2022-10-11 | 2023-02-03 | 广西晶联光电材料有限责任公司 | 一种ito靶材的常压烧结方法 |
CN115677361B (zh) * | 2022-10-11 | 2023-08-11 | 广西晶联光电材料有限责任公司 | 一种ito靶材的常压烧结方法 |
Also Published As
Publication number | Publication date |
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CN1984855B (zh) | 2010-05-12 |
JPWO2006038538A1 (ja) | 2008-05-15 |
KR20070028517A (ko) | 2007-03-12 |
TW200611989A (en) | 2006-04-16 |
KR100873088B1 (ko) | 2008-12-09 |
KR20080075926A (ko) | 2008-08-19 |
CN1984855A (zh) | 2007-06-20 |
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