WO2012153491A1 - In-Ga-Zn系酸化物スパッタリングターゲット及びその製造方法 - Google Patents
In-Ga-Zn系酸化物スパッタリングターゲット及びその製造方法 Download PDFInfo
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- WO2012153491A1 WO2012153491A1 PCT/JP2012/002917 JP2012002917W WO2012153491A1 WO 2012153491 A1 WO2012153491 A1 WO 2012153491A1 JP 2012002917 W JP2012002917 W JP 2012002917W WO 2012153491 A1 WO2012153491 A1 WO 2012153491A1
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Definitions
- the present invention relates to a sputtering target (target) for producing an oxide thin film such as an oxide semiconductor or a transparent conductive film.
- An amorphous oxide film made of indium oxide, zinc oxide, and gallium oxide has a visible light transmission property and wide electrical characteristics from a conductor or a semiconductor to an insulator. (For example, it is used as a thin film transistor (TFT) or the like).
- TFT thin film transistor
- Non-Patent Document 1 In—Ga—Zn-based oxide semiconductors have attracted attention.
- the oxide film As a method for forming the oxide film, physical film formation such as sputtering, PLD (pulse laser deposition), vapor deposition, and chemical film formation such as a sol-gel method are being studied. Among these, since the film can be uniformly formed over a large area at a relatively low temperature, the film formation by the sputtering method is mainly studied at the practical level.
- a target made of an oxide sintered body is used in order to form a film uniformly, stably and efficiently (at a high film formation rate). It is common.
- the target used for sputtering is preferably highly conductive and generates less abnormal discharge and nodules, but it is not easy to manufacture such an In—Ga—Zn target.
- the reason for this is that the properties and state of the target change depending on the manufacturing conditions of the target and the composition of the components, the conductivity changes, and the ease of occurrence of nodules and abnormal discharge changes.
- Patent Document 1 In order to obtain an In—Ga—Zn-based target with few abnormal discharges and nodules, it has been found that reducing the spinel phase represented by ZnGa 2 O 4 in the target composition is extremely effective.
- Patent Document 1 the specific surface area of the raw material powder of In 2 O 3 is set to 10 m 2 / g or less, and further pulverized until the difference in specific surface area of the raw material powder becomes 2.0 m 2 / g or more before and after the pulverization step. As a result, reduction of the spinel phase is achieved.
- An object of the present invention is to provide an In—Ga—Zn-based oxide sputtering target with less occurrence of abnormal discharge and nodules.
- a novel oxide having a new crystal structure and an oxide mixture containing InGaZnO 4 having a homologous crystal structure are not observed to form a ZnGa 2 O 4 phase, which is abnormal.
- the present invention has been completed by finding that it has few discharges and nodules and is excellent as a sputtering target for forming a thin film for use in an oxide semiconductor. According to the present invention, the following sputtering target and the like are provided. 1. A sputtering target containing the following oxide A and InGaZnO 4 .
- Oxide A An oxide in which diffraction peaks are observed in the following regions A to K in a chart obtained by X-ray diffraction measurement (Cuk ⁇ ray).
- A. 2 ⁇ 7.0 ° to 8.4 °
- B. 2 ⁇ 30.6 ° to 32.0 °
- C. 2 ⁇ 33.8 ° to 35.8 °
- D. 2 ⁇ 53.5 ° to 56.5 °
- E. 2 ⁇ 56.5 ° to 59.5 °
- F. 2 ⁇ 14.8 ° to 16.2 °
- I. 2 ⁇ 43.1 ° -46.1 ° J. et al.
- FIG. 3 is an X-ray diffraction chart showing peaks A to K of oxide A.
- FIG. FIG. 3 is a diagram illustrating an X-ray diffraction chart of oxide A, and crystal structures of InGaO 3 (ZnO) 2 (JCPDS: 40-0252) and In 2 O 3 (ZnO) 2 (JCPDS: 20-1442).
- the sputtering target of the present invention is made of an In—Ga—Zn-based oxide sintered body containing indium element (In), gallium element (Ga), and zinc element (Zn), and has the following two crystal structures. It is characterized by. Crystal structure 1: Oxide A defined below Crystal structure 2: InGaZnO 4 having a homologous crystal structure
- the above oxide A has a crystal structure newly discovered by the present inventors, and the present inventors have found that the oxide A can be obtained almost as a single component by the method described in the experimental examples described later. Yes. From the chart obtained by the X-ray diffraction measurement, the oxide A of the present invention can be identified.
- FIG. 1 shows a chart obtained from the X-ray diffraction measurement (Cuk ⁇ ray) of the oxide A produced in Experimental Example 1.
- the oxide A has the diffraction peaks described below.
- the horizontal axis is 2 ⁇ , and the vertical axis is intensity.
- A. 2 ⁇ 7.0 ° to 8.4 ° (preferably 7.2 ° to 8.2 °)
- B. 2 ⁇ 30.6 ° -32.0 ° (preferably 30.8 ° -31.8 °)
- C. 2 ⁇ 33.8 ° to 35.8 ° (preferably 34.5 ° to 35.3 °)
- D. 2 ⁇ 53.5 ° to 56.5 ° (preferably 54.1 ° to 56.1 °)
- one of diffraction peaks observed at 2 ⁇ of 30.6 ° to 32.0 ° (region B) and 33.8 ° to 35.8 ° (region C) is the main peak.
- the other is preferably a sub-peak.
- the definition of the main peak is the peak with the highest intensity (height) in the range of 2 ⁇ of 5 to 80 °
- the definition of the sub-peak is the peak with the second highest intensity.
- the measurement conditions for X-ray diffraction are, for example, as follows.
- FIG. 2 shows an X-ray diffraction chart of the oxide A, a crystal structure represented by InGaO 3 (ZnO) 2 (JCPDS: 40-0252), and In 2 O 3 (ZnO) 2.
- the crystal structure represented by (JCPDS: 20-1442) is shown.
- the X-ray diffraction chart of the oxide A has a crystal structure represented by InGaO 3 (ZnO) 2 (JCPDS: 40-0252) and a crystal structure represented by In 2 O 3 (ZnO) 2 (JCPDS: 20-1442). It is similar.
- the oxide A has a peak peculiar to InGaO 3 (ZnO) 2 (the peak in the region A) and a peak peculiar to In 2 O 3 (ZnO) 2 (the peaks in the regions D and E). Therefore, it can be determined that InGaO 3 (ZnO) 2 and In 2 O 3 (ZnO) 2 have different new periodicities. That is, the oxide A is different from InGaO 3 (ZnO) 2 and In 2 O 3 (ZnO) 2 .
- this peak is between the main peaks of In 2 O 3 (ZnO) 2 and InGaO 3 (ZnO) 2 , that is, between 31 ° and 32 °. Therefore, it is shifted to a lower angle side than the main peak of InGaO 3 (ZnO) 2 (it seems that the interstitial distance is widened), and is higher than the main peak of In 2 O 3 (ZnO) 2. There is a shift (it seems that the distance between lattices is narrowed).
- oxygen in the oxide may be excessive or insufficient (oxygen deficiency) (the atomic ratio of oxygen element is chemical). May deviate from the stoichiometric ratio). If the oxygen in the oxide is excessive, the resistance may be too high when the target is used, and therefore it is preferable to have oxygen deficiency.
- the homologous crystal structure represented by InGaZnO 4 is a JCPDS (Joint Committee of Powder Diffraction Standards) card no. Since there is a registration in 38-1104, it can be specified by referring to it. Note that the crystal type of InGaZnO 4 may be expressed as InGaO 3 (ZnO).
- the structure of InGaZnO 4 can be determined by a crystal structure X-ray diffraction pattern, and oxygen may be excessive or insufficient (oxygen deficiency) (may be shifted according to the stoichiometric ratio). It is preferable to have. If oxygen is excessive, resistance may become too high when targeted.
- the lattice constant determined from X-ray diffraction is JCPDS card no. It may be different from that of 38-1104.
- the peak position is the JCPDS card no. It may be different from that of 38-1104. Note that the shift to the low angle side is presumed to be a state in which In is substituted by solid solution at the Ga site of InGaO 3 (ZnO) or atoms are inserted between the lattices.
- the crystal phase can be identified by combining techniques such as EPMA and ⁇ -XRD (micro-part X-ray diffraction).
- the sputtering target of the present invention may contain a crystal structure other than the crystal structure 1 and the crystal structure 2 described above, and as the crystal structure to be contained, a crystal phase with high conductivity such as In 2 O 3 is more preferable, It is preferable that a spinel structure represented by ZnGa 2 O 4 is not included. Incidentally, it does not contain a spinel structure represented by ZnGa 2 O 4 is determined by the diffraction peak of X-ray diffraction chart can not be confirmed. The fact that the peak cannot be confirmed includes not only the case where the peak intensity is 0 but also the case where the intensity ratio is 3% or less with respect to the maximum peak.
- the content of each crystal can be calculated from the intensity ratio of the diffraction peaks of the X-ray diffraction chart.
- the atomic ratio of an indium element (In), a gallium element (Ga), and a zinc element (Zn) satisfy
- the atomic ratio of Zn when the atomic ratio of Zn is less than 0.25, a crystal phase represented by InGaZnO 4 is difficult to be generated, and when it exceeds 0.55, oxide A is difficult to be generated.
- the atomic ratio of Zn is preferably 0.30 to 0.50, more preferably 0.32 to 0.47, and particularly preferably 0.35 to 0.45. In this range, it is easy to produce a target including both the oxide A and a homologous structure represented by InGaZnO 4 .
- a thin film having a Ga atomic ratio of less than 0.15 tends to be a conductive film and is difficult to drive a TFT.
- the mobility may decrease when a thin film transistor (semiconductor thin film) is produced.
- the atomic ratio of Ga is preferably 0.18 to 0.30, and more preferably 0.20 to 0.28.
- the atomic ratio of indium element (In) and zinc element (Zn) satisfies the following formula (3).
- the following formula (3) an improvement in mobility of the thin film transistor obtained when the indium ratio is 0.51 or more can be expected.
- In / (In + Zn) is preferably 0.68 or less.
- the atomic ratio of indium element (In) and gallium element (Ga) further satisfies the following formula (4).
- the carrier concentration of the thin film can be easily controlled when the indium ratio is 0.58 or less.
- In / (In + Ga) is preferably 0.2 or more, and more preferably 0.3 or more.
- the atomic ratio of each element contained in the target or oxide thin film can be determined by quantitatively analyzing the contained elements with an inductively coupled plasma emission spectrometer (ICP-AES). Specifically, in the analysis using ICP-AES, when a solution sample is atomized with a nebulizer and introduced into an argon plasma (about 6000 to 8000 ° C.), the elements in the sample are excited by absorbing thermal energy, Orbital electrons move from the ground state to high energy level orbitals. These orbital electrons move to a lower energy level orbit in about 10 ⁇ 7 to 10 ⁇ 8 seconds. At this time, the energy difference is emitted as light to emit light. Since this light shows a wavelength (spectral line) unique to the element, the presence of the element can be confirmed by the presence or absence of the spectral line (qualitative analysis).
- ICP-AES inductively coupled plasma emission spectrometer
- the sample concentration can be obtained by comparing with a standard solution having a known concentration (quantitative analysis). After identifying the elements contained in the qualitative analysis, the content is obtained by qualitative analysis, and the atomic ratio of each element is obtained from the result.
- the sputtering target of the present invention is substantially composed of an oxide of In, Ga, and Zn, and other metal elements other than In, Ga, and Zn, for example, Sn, Ge, and the like within a range that does not impair the effects of the present invention. Further, inevitable impurities such as Si, Sc, Ti, Zr, and Hf may be contained. “Substantially” means that 95 wt% or more and 100 wt% or less (preferably 98 wt% or more and 100 wt% or less) of the sputtering target is an oxide of In, Ga, and Zn.
- the target of the present invention can be produced, for example, by sintering raw material powder containing each metal element. Specifically, after firing In 2 O 3 and Ga 2 O 3 , ZnO is mixed and fired. The raw material oxide is blended so that the obtained target satisfies the above formulas (1) and (2). Each step will be described below.
- the compound of the metal element contained in the oxide of the present invention is mixed.
- powders such as indium compound powder, gallium compound powder, and zinc compound powder are used.
- the indium compound include indium oxide and indium hydroxide.
- the gallium compound include gallium oxide and gallium hydroxide.
- the zinc compound include zinc oxide and zinc hydroxide.
- an oxide is preferable because it is easy to sinter and it is difficult to leave a by-product.
- the specific surface area (BET specific surface area) of indium oxide, gallium oxide, and zinc oxide is usually 3 to 18 m 2 / g, 3 to 18 m 2 / g, and 3 to 18 m 2 / g, respectively.
- each is 7 to 16 m 2 / g, 7 to 16 m 2 / g, 3 to 10 m 2 / g, more preferably 7 to 15 m 2 / g, 7 to 15 m 2 / g, and 4 to 10 m 2 / g.
- Particularly preferred are 11 to 15 m 2 / g, 11 to 15 m 2 / g, and 4 to 5 m 2 / g, respectively.
- the specific surface area is too small, aggregates of the respective elements may grow in the sintered body, the crystal form of the raw material powder may remain, an unexpected crystal form may be generated, and the properties may change. If the specific surface area is too large, an unexpected crystal form may be generated and the properties may be changed, or a dispersion failure may occur, resulting in poor appearance and uneven characteristics.
- the purity of the raw material is usually 2N (99% by mass) or more, preferably 3N (99.9% by mass) or more, particularly preferably 4N (99.99% by mass) or more. If the purity is lower than 2N, the durability may be lowered, or impurities may enter the liquid crystal side and baking may occur. It is preferable to use metallic zinc (zinc powder) as a part of the raw material. When zinc dust is used, the generation of white spots can be reduced.
- an indium compound and a gallium compound are mixed and fired, and then a zinc compound is mixed.
- the raw materials are preferably mixed and pulverized uniformly using an ordinary mixing and pulverizing machine such as a wet ball mill, a bead mill or an ultrasonic device.
- heat treatment is preferably performed at 500 to 1200 ° C. for 1 to 100 hours.
- a heat treatment of less than 500 ° C. or less than 1 hour may result in insufficient thermal decomposition of the indium compound and the gallium compound.
- the temperature exceeds 1200 ° C. or exceeds 100 hours, particle coarsening may occur. Therefore, it is particularly preferable to perform heat treatment at 800 to 1200 ° C. for 2 to 50 hours.
- the calcined product obtained here is preferably pulverized before the following molding step and firing step.
- the pulverization may be carried out so that the raw material powder has a volume average particle diameter (D50) of preferably 2 ⁇ m or less, more preferably 1 ⁇ m or less, and particularly preferably 0.5 ⁇ m or less.
- D50 volume average particle diameter
- the purpose is uniform dispersion of raw materials. If raw material powder having a large particle size is present, there may be uneven composition depending on the location. Uneven composition depending on the location causes abnormal discharge during sputtering. In addition, the composition unevenness may cause a difference in composition between the target and the produced thin film.
- Examples of the molding process include press molding (uniaxial molding), mold molding, cast molding, injection molding, and the like.
- press molding uniaxial molding
- mold molding cast molding
- injection molding injection molding
- cold isostatic pressure CIP
- simple press molding uniaxial press
- uneven pressure is generated, and an unexpected crystal form may be generated.
- hot isostatic pressure HIP
- molding aids such as polyvinyl alcohol, methylcellulose, polywax, and oleic acid may be used.
- the firing step is a step of firing the molded body obtained in the molding step. Firing can be performed by hot isostatic pressure (HIP) firing or the like.
- HIP hot isostatic pressure
- firing is usually conducted at 1100 to 1600 ° C. for usually 30 minutes to 360 hours, preferably 8 to 180 hours, and more preferably 12 to 96 hours. If the firing temperature is less than 1100 ° C., the density of the target may be difficult to increase, or it may take too much time for sintering. On the other hand, if the temperature exceeds 1600 ° C., the composition may shift due to vaporization of the components, or the furnace may be damaged. If the burning time is less than 30 minutes, the density of the target is difficult to increase, and if it is longer than 360 hours, it takes too much production time and the cost increases, so that it cannot be used practically.
- Firing is usually performed in a normal pressure atmosphere containing oxygen such as an air atmosphere or a pressurized atmosphere containing oxygen.
- a normal pressure atmosphere containing oxygen such as an air atmosphere or a pressurized atmosphere containing oxygen.
- the temperature rising rate during firing is usually 8 ° C./min or less, preferably 4 ° C./min or less, more preferably 2 ° C./min or less. If it is 8 ° C./min or less, cracks are unlikely to occur when the temperature falls.
- the temperature-fall rate at the time of baking is 4 degrees C / min or less normally, Preferably it is 2 degrees C / min or less. If it is 4 ° C./min or less, cracks are unlikely to occur when the temperature falls.
- the reduction process is a process for making the bulk resistance of the sintered body obtained in the firing process uniform across the entire target, and is a process provided as necessary. Examples thereof include a method using a reducing gas, vacuum firing or reduction using an inert gas.
- a reducing gas hydrogen, methane, carbon monoxide, a mixed gas of these gases and oxygen, or the like can be used.
- reduction treatment by firing in an inert gas nitrogen, argon, a mixed gas of these gases and oxygen, or the like can be used.
- the temperature during the reduction treatment is usually 100 to 800 ° C, preferably 200 to 800 ° C.
- the reduction treatment time is usually 0.01 to 10 hours, preferably 0.05 to 5 hours.
- the oxide sintered body including both the crystal structures 1 and 2 is obtained by the above steps.
- This oxide sintered body has a high relative density, low resistance (high conductivity), high bending strength, high uniformity, and is used for producing oxide thin films such as oxide semiconductors and transparent conductive films. Suitable as a target.
- the oxide sintered body is processed into a desired shape as necessary.
- the processing is performed to cut the oxide sintered body into a shape suitable for mounting on a sputtering apparatus and to attach a mounting jig such as a backing plate.
- the sintered body is ground by, for example, a surface grinder so that the surface roughness Ra is 5 ⁇ m or less.
- the sputter surface of the sputtering target may be mirror-finished to have an average surface roughness Ra of 1000 angstroms or less.
- known polishing techniques such as mechanical polishing, chemical polishing, and mechanochemical polishing (a combination of mechanical polishing and chemical polishing) can be used.
- polishing to # 2000 or more with a fixed abrasive polisher polishing liquid: water
- lapping with loose abrasive lapping abrasive: SiC paste, etc.
- lapping by changing the abrasive to diamond paste can be obtained by:
- ultrasonic cleaning is effective by performing multiple oscillations at a frequency of 25 to 300 KHz. For example, it is preferable to perform ultrasonic cleaning by multiplying twelve types of frequencies in 25 KHz increments between frequencies of 25 to 300 KHz.
- the thickness of the target is usually 2 to 20 mm, preferably 3 to 12 mm, particularly preferably 4 to 10 mm. Further, a plurality of targets may be attached to one backing plate to make a substantially single target.
- the sputtering target of the present invention preferably has a relative density of 95% or more, more preferably 96% or more. If it is less than 95%, the target may be easily broken or abnormal discharge may be easily generated.
- the relative density is a density calculated relative to the theoretical density calculated from the weighted average. The density calculated from the weighted average of the density of each raw material is the theoretical density, which is defined as 100%.
- the resistivity of the target is preferably 0.01 m ⁇ cm or more and 10 m ⁇ cm or less, more preferably 0.1 m ⁇ cm or more and 5 m ⁇ cm or less, and particularly preferably 0.2 m ⁇ cm or more and 3 m ⁇ cm or less.
- the resistance value exceeds 10 m ⁇ cm, when DC sputtering is continued for a long time, a spark is generated due to abnormal discharge, the target is cracked, particles ejected by the spark adhere to the deposition substrate, and the oxide semiconductor film The performance may be degraded.
- it if it is smaller than 0.01 m ⁇ cm, the resistivity of the target is smaller than the resistance of the particles, and abnormal discharge may occur due to the scattered particles.
- An oxide thin film can be formed by sputtering an object such as a substrate using the sputtering target of the present invention.
- the oxide thin film can be suitably used for a semiconductor layer of a thin film transistor, an oxide thin film layer, and the like.
- the film thickness at the time of film formation is preferably 1 to 45 nm, more preferably 3 to 30 nm, and particularly preferably 5 to 20 nm. When the film thickness is 45 nm or less, it can be expected that the semiconductor has a high mobility and a low S value.
- the sintering conditions were as follows.
- the obtained sintered body was oxide A, which is almost a single component.
- Temperature increase rate 2 ° C / min
- Sintering temperature 1480 ° C
- Sintering time 6 hours
- Sintering atmosphere Oxygen inflow Temperature drop time: 72 hours
- Oxide A can be obtained by the above method, but in some cases, after addition of binder or press molding (uniaxial pressing), cold isostatic pressure (CIP), hot isostatic pressure (HIP), etc. are performed to form two or more stages. A process may be provided.
- binder or press molding uniaxial pressing
- CIP cold isostatic pressure
- HIP hot isostatic pressure
- the mixed fired product of In 2 O 3 and Ga 2 O 3 and ZnO were mixed and pulverized by a wet medium stirring mill. After grinding, it was dried with a spray dryer. The obtained mixed powder was filled into a mold, and molded by pressing at a surface pressure of 2200 kgf / cm 2 at a cold isostatic pressure (CIP) for 5 minutes to produce a compact. Then, it sintered with the electric furnace.
- the sintering conditions were as follows. Temperature increase rate: 2 ° C / min Sintering temperature: 1400 ° C Sintering time: 5 hours Sintering atmosphere: Oxygen inflow Temperature drop time: 72 hours
- the target was bonded to an oxygen-free copper backing plate with indium solder to obtain a target.
- the surface roughness of the target was Ra ⁇ 0.5 ⁇ m and had a ground surface with no directionality.
- Target film formation characteristics (a) Nodule manufactured target was mounted on a DC sputtering film forming apparatus. In an Ar atmosphere of 0.3 Pa, continuous sputtering was performed at a DC output of 200 W for 100 hours, and nodules generated on the target surface were visually observed.
- In 2 O 3 purity 4N, manufactured by Asian Physical Materials Company
- Ga 2 O 3 purity 4N, manufactured by Asian Physical Materials Company
- ZnO purity 4N, high Purity Chemical Co., Ltd.
- the obtained mixed powder was filled into a mold, and molded by pressing at a surface pressure of 2200 kgf / cm 2 at a cold isostatic pressure (CIP) for 5 minutes to produce a compact. Then, it sintered with the electric furnace.
- the sintering conditions were as follows. Temperature increase rate: 2 ° C / min Sintering temperature: 1400 ° C Sintering time: 5 hours Sintering atmosphere: Oxygen inflow Temperature drop time: 72 hours
- the targets of Examples 1 to 4 can be used as good targets with less abnormal discharge and nodules. Further, the manufacturing methods of Examples 1 to 4 and Comparative Example 2 are effective in reducing bulk resistance, improving resistance uniformity, and reducing abnormal discharge.
- the sputtering target of the present invention can be suitably used for forming an oxide thin film.
- the oxide thin film can be used for a semiconductor layer of a thin film transistor, for example.
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Abstract
Description
特に、野村、細野等によって発表されて以来(非特許文献1)、In-Ga-Zn系酸化物半導体が注目されてきた。
本発明によれば、以下のスパッタリングターゲット等が提供される。
1.下記酸化物Aと、InGaZnO4とを含有するスパッタリングターゲット。
酸化物A:X線回折測定(Cukα線)により得られるチャートにおいて、下記のA~Kの領域に回折ピークが観測される酸化物。
A.2θ=7.0°~8.4°
B.2θ=30.6°~32.0°
C.2θ=33.8°~35.8°
D.2θ=53.5°~56.5°
E.2θ=56.5°~59.5°
F.2θ=14.8°~16.2°
G.2θ=22.3°~24.3°
H.2θ=32.2°~34.2°
I.2θ=43.1°~46.1°
J.2θ=46.2°~49.2°
K.2θ=62.7°~66.7°
2.ZnGa2O4で表されるスピネル構造のX線回折測定(Cukα線)によるピークが、最大ピークの3%以下である1に記載のスパッタリングターゲット。
3.インジウム元素(In)、ガリウム元素(Ga)及び亜鉛元素(Zn)の原子比が、下記式(1)及び(2)を満たす1又は2に記載のスパッタリングターゲット。
0.25≦Zn/(In+Ga+Zn)≦0.55 (1)
0.15≦Ga/(In+Ga+Zn)<0.33 (2)
4.インジウム元素(In)及び亜鉛元素(Zn)の原子比が、下記式(3)を満たす3に記載のスパッタリングターゲット。
0.51≦In/(In+Zn)≦0.68 (3)
5.インジウム元素(In)及びガリウム元素(Ga)の原子比が、下記式(4)を満たす3に記載のスパッタリングターゲット。
In/(In+Ga)≦0.58 (4)
6.インジウム化合物とガリウム化合物の原料粉を混合して500℃以上1200℃以下で焼成した後、亜鉛化合物の原料粉を混合して1100℃以上1600℃以下で焼成して製造した1~5のいずれかに記載のスパッタリングターゲット。
7.抵抗が10mΩcm以下、相対密度95%以上である1~6のいずれかに記載のスパッタリングターゲット。
8.1~7のいずれかに記載スパッタリングターゲットを用いて作製された酸化物薄膜。
結晶構造1:下記で規定される酸化物A
結晶構造2:ホモロガス結晶構造を有するInGaZnO4
A.2θ=7.0°~8.4°(好ましくは7.2°~8.2°)
B.2θ=30.6°~32.0°(好ましくは30.8°~31.8°)
C.2θ=33.8°~35.8°(好ましくは34.5°~35.3°)
D.2θ=53.5°~56.5°(好ましくは54.1°~56.1°)
E.2θ=56.5°~59.5°(好ましくは57.0°~59.0°)
F.2θ=14.8°~16.2°(好ましくは15.0°~16.0°)
G.2θ=22.3°~24.3°(好ましくは22.8°~23.8°)
H.2θ=32.2°~34.2°(好ましくは32.7°~33.7°)
I.2θ=43.1°~46.1°(好ましくは43.6°~45.6°)
J.2θ=46.2°~49.2°(好ましくは46.7°~48.7°)
K.2θ=62.7°~66.7°(好ましくは63.7°~65.7°)
尚、メインピークの定義は、2θが5~80°の範囲で最も強度(高さ)の強いピークであり、サブピークの定義は、2番目に強度の強いピークのことである。メインピークが重なる場合は、他のピークからメインピークの強度を逆算することが可能である。
装置:(株)リガク製Ultima-III
X線:Cu-Kα線(波長1.5406Å、グラファイトモノクロメータにて単色化)
2θ-θ反射法、連続スキャン(1.0°/分)
サンプリング間隔:0.02°
スリット DS、SS:2/3°、RS:0.6mm
尚、InGaZnO4の結晶型は、InGaO3(ZnO)と表記される場合もある。
尚、ZnGa2O4で表されるスピネル構造が含まれないことは、X線回折チャートの回折ピークが確認できないことで判断する。ピークが確認できないとは、ピーク強度が0である場合の他、最大ピークに対して強度比が3%以下の場合を含む。
0.25≦Zn/(In+Ga+Zn)≦0.55 (1)
0.15≦Ga/(In+Ga+Zn)<0.33 (2)
Znの原子比は、0.30~0.50であることが好ましく、0.32~0.47であることがより好ましく、特に0.35~0.45であることが好ましい。この範囲の場合、酸化物AとInGaZnO4で表されるホモロガス構造をともに含んだターゲットを作製しやすい。
Gaの原子比は、0.18~0.30であることが好ましく、さらに0.20~0.28であることが好ましい。
0.51≦In/(In+Zn) (3)
尚、In/(In+Zn)は0.68以下であることが好ましい。
In/(In+Ga)≦0.58 (4)
尚、In/(In+Ga)は0.2以上であることが好ましく、0.3以上であることがさらに好ましい。
具体的に、ICP-AESを用いた分析では、溶液試料をネブライザーで霧状にして、アルゴンプラズマ(約6000~8000℃)に導入すると、試料中の元素は熱エネルギーを吸収して励起され、軌道電子が基底状態から高いエネルギー準位の軌道に移る。この軌道電子は10-7~10-8秒程度で、より低いエネルギー準位の軌道に移る。この際にエネルギーの差を光として放射し発光する。この光は元素固有の波長(スペクトル線)を示すため、スペクトル線の有無により元素の存在を確認できる(定性分析)。
定性分析で含有されている元素を特定後、定性分析で含有量を求め、その結果から各元素の原子比を求める。
「実質的」とは、スパッタリングターゲットの95重量%以上100重量%以下(好ましくは98重量%以上100重量%以下)がIn、Ga、Znの酸化物であることを意味する。
以下各工程について説明する。
配合工程で、本発明の酸化物に含有される金属元素の化合物を混合する。
原料としては、インジウム化合物の粉末、ガリウム化合物の粉末、亜鉛化合物の粉末等の粉末を用いる。インジウムの化合物としては、例えば、酸化インジウム、水酸化インジウム等が挙げられる。ガリウムの化合物としては、例えば、酸化ガリウム、水酸化ガリウム等が挙げられる。亜鉛の化合物としては、例えば、酸化亜鉛、水酸化亜鉛等が挙げられる。各々の化合物として、焼結のしやすさ、副生成物の残存のし難さから、酸化物が好ましい。
原料の一部として金属亜鉛(亜鉛末)を用いることが好ましい。亜鉛末を用いるとホワイトスポットの生成を低減することができる。
本発明では、仮焼工程で、上記工程で得たインジウム化合物とガリウム化合物の混合物を仮焼する。この仮焼によりInとGaが十分に混じり合いZnGa2O4で表されるスピネル相の生成が抑えられる。
従って、特に好ましいのは、800~1200℃で、2~50時間、熱処理することである。
成形工程で、仮焼物と亜鉛化合物の混合物を加圧成形して成形体とする。この工程により、ターゲットとして好適な形状に成形する。仮焼物の微粉末を造粒した後、成形処理により所望の形状に成形することができる。
尚、単なるプレス成形(一軸プレス)であると圧力にムラ生じて、想定外の結晶型が生成してしまうおそれがある。
また、プレス成形(一軸プレス)後に、冷間静水圧(CIP)、熱間静水圧(HIP)等を行い2段階以上の成形工程を設けてもよい。
焼成工程は、上記成形工程で得られた成形体を焼成する工程である。焼成は、熱間静水圧(HIP)焼成等によって行うことができる。
燃焼時間が30分未満であると、ターゲットの密度が上がり難く、360時間より長いと、製造時間がかかり過ぎコストが高くなるため、実用上採用できない。
焼成は、通常大気雰囲気等の酸素が含まれている常圧雰囲気又は酸素が含まれている加圧雰囲気下で行う。
酸素を含有しない雰囲気で焼成したり、1600℃以上の温度において焼成したりすると、得られるターゲットの密度を十分に向上させることができず、スパッタリング時の異常放電の発生を十分に抑制できなくなる場合がある。
また、焼成時の降温速度は、通常4℃/分以下、好ましくは2℃/分以下である。4℃/分以下であると降温時にクラックが発生しにくい。
還元工程は、上記焼成工程で得られた焼結体のバルク抵抗をターゲット全体で均一化するためのものであり、必要に応じて設けられる工程である
還元方法としては、例えば、還元性ガスによる方法や真空焼成又は不活性ガスによる還元等が挙げられる。
還元性ガスによる還元処理の場合、水素、メタン、一酸化炭素、又はこれらのガスと酸素との混合ガス等を用いることができる。
不活性ガス中での焼成による還元処理の場合、窒素、アルゴン、又はこれらのガスと酸素との混合ガス等を用いることができる。
還元処理時の温度は、通常100~800℃、好ましくは200~800℃である。また、還元処理の時間は、通常0.01~10時間、好ましくは0.05~5時間である。
加工は、上記の酸化物焼結体をスパッタリング装置への装着に適した形状に切削加工し、また、バッキングプレート等の装着用治具を取り付けるために行う。酸化物焼結体をスパッタリングターゲットとするには、焼結体を、例えば、平面研削盤で研削して表面粗さRaを5μm以下とする。さらに、スパッタリングターゲットのスパッタ面に鏡面加工を施して、平均表面粗さRaを1000オングストローム以下としてもよい。この鏡面加工(研磨)は機械的な研磨、化学研磨、メカノケミカル研磨(機械的な研磨と化学研磨の併用)等の、既に知られている研磨技術を用いることができる。例えば、固定砥粒ポリッシャー(ポリッシュ液:水)で#2000以上にポリッシングしたり、又は遊離砥粒ラップ(研磨材:SiCペースト等)にてラッピング後、研磨材をダイヤモンドペーストに換えてラッピングすることによって得ることができる。このような研磨方法には特に制限はない。
相対密度とは、加重平均より算出した理論密度に対して相対的に算出した密度である。各原料の密度の加重平均より算出した密度が理論密度であり、これを100%とする。
成膜時の膜厚としては、1~45nmが好ましく、3~30nmがさらに好ましく、5~20nmが特に好ましい。膜厚が、45nm以下となることにより、移動度が高く、S値が低い半導体となることが期待できる。
(1)酸化物Aの製造
出発原料として、In2O3(アジア物性材料社製:純度4N)、Ga2O3(アジア物性材料社製:純度4N)及びZnO(高純度化学社製:純度4N)を使用した。
これらの原料を原子比で、In:Ga:Zn=37.5:12.5:50.0となるように秤量し、湿式媒体攪拌ミルを使用して混合粉砕した。尚、湿式媒体攪拌ミルの媒体には1mmφのジルコニアビーズを使用した。
そして混合粉砕後、スプレードライヤーで乾燥させた。得られた混合粉末を金型に充填しコールドプレス機にて加圧成形し成形体を作製した。
その後、電気炉にて焼結した。焼結条件は以下の通りとした。得られた焼結体はほぼ単一成分である酸化物Aであった。
昇温速度:2℃/分
焼結温度:1480℃
焼結時間:6時間
焼結雰囲気:酸素流入
降温時間:72時間
この酸化物Aについて後述する実施例1の条件でX線回折測定をした。チャートを図1に示す。
(1)酸化物焼結体の作製
出発原料として、In2O3(純度4N、アジア物性材料社製)、Ga2O3(純度4N、アジア物性材料社製)及びZnO(純度4N、高純度化学社製)を使用し、原子比でIn:Ga:Zn=42:20:38となるように秤量した。In2O3とGa2O3を、湿式媒体攪拌ミルを使用して混合粉砕し、匣鉢に入れ大気中で900℃、4時間焼成を行った。尚、湿式媒体攪拌ミルの媒体には1mmφのジルコニアビーズを使用した。次に、In2O3とGa2O3の混合焼成物とZnOとを湿式媒体攪拌ミルで混合粉砕した。粉砕後、スプレードライヤーで乾燥させた。得られた混合粉末を金型に充填し、冷間静水圧(CIP)にて面圧2200kgf/cm2、5分保持にて加圧成形し成形体を作製した。
その後、電気炉にて焼結した。焼結条件は以下の通りとした。
昇温速度:2℃/分
焼結温度:1400℃
焼結時間:5時間
焼結雰囲気:酸素流入
降温時間:72時間
焼結後、厚さ6mmの焼結体を厚さ5mm直径4インチに研削、研磨した。この焼結体からターゲット用焼結体を切り出した。焼結体の側辺をダイヤモンドカッターで切断して、表面を平面研削盤で研削して表面粗さRaを0.5μm以下とした。
次に、表面をエアーブローし、さらに周波数25~300kHzの間で25kHz刻みに12種類の周波数を多重発振させて3分間超音波洗浄し、ターゲットを得た。
得られた酸化物焼結体(ターゲット)について、下記の評価を行った。結果を表1に示す。
誘導結合プラズマ発光分析装置(ICP-AES、島津製作所社製)で分析した。
以下の条件のX線回折測定(XRD)により判定した。
解析結果を表1に示す。表中の○はピークが確認できたことを示し、-はピークが確認できないことを示す。ピークが確認できないとは、最大ピークに対して3%以下のピークのことである。
尚、酸化物Aについては図1のチャートを用いて判定した。
・装置:(株)リガク製Ultima-III
・X線:Cu-Kα線(波長1.5406Å、グラファイトモノクロメータにて単色化)・2θ-θ反射法、連続スキャン(1.0°/分)
・サンプリング間隔:0.02°
・スリット DS、SS:2/3°、RS:0.6mm
(a)相対密度
原料粉の密度から計算した理論密度と、アルキメデス法で測定した焼結体の密度から、下記計算式にて算出した。
相対密度=(アルキメデス法で測定した密度)÷(理論密度)×100(%)
抵抗率計(三菱化学(株)製、ロレスタ)を使用し四探針法(JIS R1637)に基づき測定、10箇所の平均値を抵抗率値とした。
抵抗率計(三菱化学(株)製、ロレスタ)を使用し四探針法(JIS R1637)に基づき測定、10箇所の平均値と標準偏差から、下記計算式にて算出した。
(標準偏差)÷(平均値)×100(%)
(a)ノジュール
製造したターゲットをDCスパッタ成膜装置に装着した。0.3PaのAr雰囲気下で、DC出力200Wにて100時間連続スパッタを行い、ターゲット表面に発生するノジュールを目視観察した。
作製したスパッタリングターゲットを、DCスパッタ装置に装着し、スパッタガスとしてアルゴンを用いて、0.3Pa、DC出力200Wにて、10kWhr連続スパッタを行い、スパッタ中の電圧変動をデータロガーに蓄積し、異常放電の有無を確認した。異常放電の有無は、電圧変動をモニターし異常放電を検出することにより行った。結果を表1に示す。5分間の測定時間中に発生する電圧変動がスパッタ運転中の定常電圧の10%以上あった場合を異常放電とした。
原料の組成比を原子比でIn:Ga:Zn=50:18:32に変更した他は、実施例1(1)~(3)と同様にターゲットを作製し、評価した。結果を表1に示す。
原料の組成比を原子比でIn:Ga:Zn=33:20:47に変更した他は、実施例1(1)~(3)と同様にターゲットを作製し、評価した。結果を表1に示す。
原料の組成比を原子比でIn:Ga:Zn=28:28:44に変更した他は、実施例1(1)~(3)と同様にターゲットを作製し、評価した。結果を表1に示す。
(1)酸化物焼結体の作製
出発原料として、In2O3(純度4N、アジア物性材料社製)、Ga2O3(純度4N、アジア物性材料社製)及びZnO(純度4N、高純度化学社製)を使用した。
これらの原料を原子比でIn:Ga:Zn=33.3:33.3:33.3として秤量し、湿式媒体攪拌ミルを使用して混合粉砕した。尚、湿式媒体攪拌ミルの媒体には1mmφのジルコニアビーズを使用した。
混合粉砕後、スプレードライヤーで乾燥させた。得られた混合粉末を金型に充填し、冷間静水圧(CIP)にて面圧2200kgf/cm2、5分保持にて加圧成形し成形体を作製した。
その後、電気炉にて焼結した。焼結条件は以下の通りとした。
昇温速度:2℃/分
焼結温度:1400℃
焼結時間:5時間
焼結雰囲気:酸素流入
降温時間:72時間
実施例1(2),(3)と同様に作製し評価した。結果を表1に示す。
原料の組成比を原子比でIn:Ga:Zn=33.3:33.3:33.3に変更した他は、実施例1(1)~(3)と同様にターゲットを作製し、評価した。結果を表1に示す。
この明細書に記載の文献の内容を全てここに援用する。
Claims (8)
- 下記酸化物Aと、InGaZnO4とを含有するスパッタリングターゲット。
酸化物A:X線回折測定(Cukα線)により得られるチャートにおいて、下記のA~Kの領域に回折ピークが観測される酸化物。
A.2θ=7.0°~8.4°
B.2θ=30.6°~32.0°
C.2θ=33.8°~35.8°
D.2θ=53.5°~56.5°
E.2θ=56.5°~59.5°
F.2θ=14.8°~16.2°
G.2θ=22.3°~24.3°
H.2θ=32.2°~34.2°
I.2θ=43.1°~46.1°
J.2θ=46.2°~49.2°
K.2θ=62.7°~66.7° - ZnGa2O4で表されるスピネル構造のX線回折測定(Cukα線)によるピークが、最大ピークの3%以下である請求項1に記載のスパッタリングターゲット。
- インジウム元素(In)、ガリウム元素(Ga)及び亜鉛元素(Zn)の原子比が、下記式(1)及び(2)を満たす請求項1又は2に記載のスパッタリングターゲット。
0.25≦Zn/(In+Ga+Zn)≦0.55 (1)
0.15≦Ga/(In+Ga+Zn)<0.33 (2) - インジウム元素(In)及び亜鉛元素(Zn)の原子比が、下記式(3)を満たす請求項3に記載のスパッタリングターゲット。
0.51≦In/(In+Zn)≦0.68 (3) - インジウム元素(In)及びガリウム元素(Ga)の原子比が、下記式(4)を満たす請求項3に記載のスパッタリングターゲット。
In/(In+Ga)≦0.58 (4) - インジウム化合物とガリウム化合物の原料粉を混合して500℃以上1200℃以下で焼成した後、亜鉛化合物の原料粉を混合して1100℃以上1600℃以下で焼成して製造した請求項1~5のいずれかに記載のスパッタリングターゲット。
- 抵抗が10mΩcm以下、相対密度95%以上である請求項1~6のいずれかに記載のスパッタリングターゲット。
- 請求項1~7のいずれかに記載スパッタリングターゲットを用いて作製された酸化物薄膜。
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| CN103193262A (zh) * | 2013-04-09 | 2013-07-10 | 桂林电子科技大学 | 一种铟镓锌氧化物粉体及其陶瓷靶材的制备方法 |
| WO2015129469A1 (ja) * | 2014-02-27 | 2015-09-03 | 住友金属鉱山株式会社 | 酸化物焼結体、スパッタリング用ターゲット、及びそれを用いて得られる酸化物半導体薄膜 |
| WO2015129468A1 (ja) * | 2014-02-27 | 2015-09-03 | 住友金属鉱山株式会社 | 酸化物焼結体、スパッタリング用ターゲット、及びそれを用いて得られる酸化物半導体薄膜 |
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| JP2013001590A (ja) * | 2011-06-15 | 2013-01-07 | Sumitomo Electric Ind Ltd | 導電性酸化物およびその製造方法、ならびに酸化物半導体膜 |
| US9885108B2 (en) * | 2012-08-07 | 2018-02-06 | Semiconductor Energy Laboratory Co., Ltd. | Method for forming sputtering target |
| JP6398643B2 (ja) * | 2014-11-20 | 2018-10-03 | Tdk株式会社 | スパッタリングターゲット、透明導電性酸化物薄膜、及び導電性フィルム |
| CN114512547A (zh) | 2015-02-12 | 2022-05-17 | 株式会社半导体能源研究所 | 氧化物半导体膜及半导体装置 |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009275272A (ja) * | 2008-05-16 | 2009-11-26 | Idemitsu Kosan Co Ltd | インジウム、ガリウム及び亜鉛を含む酸化物 |
| WO2009148154A1 (ja) * | 2008-06-06 | 2009-12-10 | 出光興産株式会社 | 酸化物薄膜用スパッタリングターゲットおよびその製造法 |
| WO2009151003A1 (ja) * | 2008-06-10 | 2009-12-17 | 日鉱金属株式会社 | スパッタリング用酸化物焼結体ターゲット及びその製造方法 |
| WO2009157535A1 (ja) * | 2008-06-27 | 2009-12-30 | 出光興産株式会社 | InGaO3(ZnO)結晶相からなる酸化物半導体用スパッタリングターゲット及びその製造方法 |
| JP2010202451A (ja) * | 2009-03-03 | 2010-09-16 | Sumitomo Electric Ind Ltd | In−Ga−Zn系複合酸化物焼結体の製造方法 |
| WO2010140548A1 (ja) * | 2009-06-05 | 2010-12-09 | Jx日鉱日石金属株式会社 | 酸化物焼結体、その製造方法及び酸化物焼結体製造用原料粉末 |
| WO2011061923A1 (ja) * | 2009-11-18 | 2011-05-26 | 出光興産株式会社 | In-Ga-Zn-O系スパッタリングターゲット |
| WO2011061936A1 (ja) * | 2009-11-19 | 2011-05-26 | 出光興産株式会社 | In-Ga-Zn系酸化物スパッタリングターゲット |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101024177B1 (ko) | 2001-08-02 | 2011-03-22 | 이데미쓰 고산 가부시키가이샤 | 스퍼터링 타겟, 투명 전도막 및 이들의 제조방법 |
| JP5522889B2 (ja) | 2007-05-11 | 2014-06-18 | 出光興産株式会社 | In−Ga−Zn−Sn系酸化物焼結体、及び物理成膜用ターゲット |
-
2011
- 2011-05-10 JP JP2011105720A patent/JP5705642B2/ja active Active
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- 2012-04-27 US US14/116,299 patent/US9206502B2/en active Active
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009275272A (ja) * | 2008-05-16 | 2009-11-26 | Idemitsu Kosan Co Ltd | インジウム、ガリウム及び亜鉛を含む酸化物 |
| WO2009148154A1 (ja) * | 2008-06-06 | 2009-12-10 | 出光興産株式会社 | 酸化物薄膜用スパッタリングターゲットおよびその製造法 |
| WO2009151003A1 (ja) * | 2008-06-10 | 2009-12-17 | 日鉱金属株式会社 | スパッタリング用酸化物焼結体ターゲット及びその製造方法 |
| WO2009157535A1 (ja) * | 2008-06-27 | 2009-12-30 | 出光興産株式会社 | InGaO3(ZnO)結晶相からなる酸化物半導体用スパッタリングターゲット及びその製造方法 |
| JP2010202451A (ja) * | 2009-03-03 | 2010-09-16 | Sumitomo Electric Ind Ltd | In−Ga−Zn系複合酸化物焼結体の製造方法 |
| WO2010140548A1 (ja) * | 2009-06-05 | 2010-12-09 | Jx日鉱日石金属株式会社 | 酸化物焼結体、その製造方法及び酸化物焼結体製造用原料粉末 |
| WO2011061923A1 (ja) * | 2009-11-18 | 2011-05-26 | 出光興産株式会社 | In-Ga-Zn-O系スパッタリングターゲット |
| WO2011061936A1 (ja) * | 2009-11-19 | 2011-05-26 | 出光興産株式会社 | In-Ga-Zn系酸化物スパッタリングターゲット |
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| CN103193262A (zh) * | 2013-04-09 | 2013-07-10 | 桂林电子科技大学 | 一种铟镓锌氧化物粉体及其陶瓷靶材的制备方法 |
| WO2015129469A1 (ja) * | 2014-02-27 | 2015-09-03 | 住友金属鉱山株式会社 | 酸化物焼結体、スパッタリング用ターゲット、及びそれを用いて得られる酸化物半導体薄膜 |
| WO2015129468A1 (ja) * | 2014-02-27 | 2015-09-03 | 住友金属鉱山株式会社 | 酸化物焼結体、スパッタリング用ターゲット、及びそれを用いて得られる酸化物半導体薄膜 |
| JP2016034888A (ja) * | 2014-02-27 | 2016-03-17 | 住友金属鉱山株式会社 | 酸化物焼結体、スパッタリング用ターゲット、及びそれを用いて得られる酸化物半導体薄膜 |
| KR20160125959A (ko) * | 2014-02-27 | 2016-11-01 | 스미토모 긴조쿠 고잔 가부시키가이샤 | 산화물 소결체, 스퍼터링용 타겟, 및 그것을 이용하여 얻어지는 산화물 반도체 박막 |
| KR20160127732A (ko) * | 2014-02-27 | 2016-11-04 | 스미토모 긴조쿠 고잔 가부시키가이샤 | 산화물 소결체, 스퍼터링용 타겟, 및 그것을 이용하여 얻어지는 산화물 반도체 박막 |
| US9670578B2 (en) | 2014-02-27 | 2017-06-06 | Sumitomo Metal Mining Co., Ltd. | Oxide sintered body, sputtering target, and oxide semiconductor thin film obtained using sputtering target |
| US9670577B2 (en) | 2014-02-27 | 2017-06-06 | Sumitomo Metal Mining Co., Ltd. | Oxide sintered body, sputtering target, and oxide semiconductor thin film obtained using sputtering target |
| KR102353562B1 (ko) | 2014-02-27 | 2022-01-20 | 미쓰이금속광업주식회사 | 산화물 소결체, 스퍼터링용 타겟, 및 그것을 이용하여 얻어지는 산화물 반도체 박막 |
| KR102353563B1 (ko) | 2014-02-27 | 2022-01-20 | 미쓰이금속광업주식회사 | 산화물 소결체, 스퍼터링용 타겟, 및 그것을 이용하여 얻어지는 산화물 반도체 박막 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20140027240A (ko) | 2014-03-06 |
| US20140145124A1 (en) | 2014-05-29 |
| JP5705642B2 (ja) | 2015-04-22 |
| TWI546273B (zh) | 2016-08-21 |
| CN103518004A (zh) | 2014-01-15 |
| TW201300345A (zh) | 2013-01-01 |
| JP2012237031A (ja) | 2012-12-06 |
| US9206502B2 (en) | 2015-12-08 |
| CN103518004B (zh) | 2015-12-23 |
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