WO2012165124A1 - 酸化モリブデンを含有する薄膜の製造方法、酸化モリブデンを含有する薄膜の形成用原料及びモリブデンアミド化合物 - Google Patents
酸化モリブデンを含有する薄膜の製造方法、酸化モリブデンを含有する薄膜の形成用原料及びモリブデンアミド化合物 Download PDFInfo
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Definitions
- the present invention relates to a method for producing a thin film containing molybdenum oxide using a vapor obtained by vaporizing a molybdenum amide compound having a specific ligand, a thin film containing molybdenum oxide produced by the production method, and the production method.
- the present invention relates to a raw material for forming a thin film containing molybdenum oxide and a novel molybdenum amide compound having a t-amylimide group as a ligand.
- Thin films containing molybdenum oxide can be used for organic light emitting diodes, liquid crystal displays, plasma display panels, field emission displays, thin film solar cells, low resistance ohmics and other electronic and semiconductor devices, mainly barrier films etc. It is used as a member of electronic parts.
- Examples of the method for producing the above thin film include flame deposition, sputtering, ion plating, MOD such as coating pyrolysis and sol-gel, and chemical vapor deposition. It has many advantages such as being excellent in performance, suitable for mass production, and capable of hybrid integration. Therefore, chemical vapor deposition (hereinafter simply referred to as CVD) including the ALD (Atomic ⁇ Layer CVD Deposition) method. Is the optimal manufacturing process.
- CVD chemical vapor deposition
- ALD Atomic ⁇ Layer CVD Deposition
- Non-Patent Document 1 reports a molybdenum amidoimide compound as a raw material for forming a molybdenum nitride thin film by ALD.
- a thin film containing molybdenum oxide is formed by introducing vapor obtained by vaporizing a raw material for forming a thin film into a substrate, and further introducing an oxidizing gas to decompose and / or chemically react to form a thin film on the substrate.
- the molybdenum compounds proposed so far have not necessarily had sufficient characteristics.
- the properties required for a compound (precursor) suitable as a raw material for forming a thin film by vaporizing a chemical compound such as CVD are low in melting point, and in a liquid state during the production of a thin film containing molybdenum oxide between the melting point and the boiling point. There is a temperature difference that can keep the temperature stable, and the liquid can be stably transported in a liquid state, and the vapor pressure is large and it is easy to vaporize.
- a compound used as a conventional molybdenum source has a problem that a temperature difference between a solid or a melting point and a boiling point is small, and a precursor transport property and a vapor pressure are low in a CVD method.
- a molybdenum compound containing a fluorine atom is used as a molybdenum source for producing a thin film containing molybdenum oxide by CVD, hydrogen fluoride may be generated as a reaction by-product during the production of the thin film, which corrodes the device. There was a problem.
- the present invention introduces a vapor containing a molybdenum amide compound obtained by vaporizing a raw material for forming a thin film containing a compound represented by the following general formula (I) onto a substrate, and further introduces an oxidizing gas.
- the present invention provides a method for producing a thin film containing molybdenum oxide, which is decomposed and / or chemically reacted to form a thin film on a substrate.
- the present invention also provides a raw material for forming a thin film containing molybdenum oxide, which contains the compound represented by the general formula (I) used in the method for producing the thin film.
- the present invention also provides a novel compound represented by the following general formula (II).
- the molybdenum amide compound according to the present invention is a low-melting-point compound that becomes liquid at room temperature or slight heating, and has a large temperature difference between the melting point and boiling point, and has a high vapor pressure.
- excellent transportability of the precursor, easy and stable supply of the supply to the substrate is possible, and high-quality thin films containing high-quality molybdenum oxide are manufactured. can do.
- FIG. 1 is a schematic view showing an example of an apparatus for chemical vapor deposition used in the method for producing a thin film containing molybdenum oxide of the present invention.
- FIG. 2 is a schematic diagram showing another example of an apparatus for chemical vapor deposition used in the method for producing a thin film containing molybdenum oxide of the present invention.
- FIG. 3 is a schematic diagram showing still another example of a chemical vapor deposition apparatus used in the method for producing a thin film containing molybdenum oxide according to the present invention.
- the linear or branched alkyl group having 1 to 4 carbon atoms represented by R 1 and R 2 is methyl, ethyl, propyl, isopropyl, butyl , S-butyl, t-butyl, isobutyl, R 3 represents t-butyl or t-amyl, y represents 0 or 2, x is 4 when y is 0, and y is When it is 2, it is 2, and a plurality of R 1 and R 2 may be the same or different.
- Specific examples of the molybdenum amide compound, which is a ligand compound having such a group include the following compound Nos. 1 to 81 may be mentioned. However, this invention is not limited at all by the following exemplary compounds.
- R 1 to R 3 in the general formula (I) are preferably those in which the compound is liquid and has a high vapor pressure.
- R 1 and R 2 are preferably a methyl group or an ethyl group
- R 3 is a t-butyl group or a t-amyl group.
- a compound in which R 3 is a t-butyl group has a high vapor pressure and is particularly preferable.
- R 1 and R 2 are preferably a methyl group or an ethyl group.
- the raw material for forming a thin film of the present invention is the above-described molybdenum amide compound used as a precursor for manufacturing a thin film containing molybdenum oxide, and the form varies depending on the process.
- the molybdenum amide compound according to the present invention is particularly useful as a raw material for chemical vapor deposition because of its physical properties.
- the raw material for forming a thin film of the present invention is a raw material for chemical vapor deposition
- the form thereof is appropriately selected according to a method such as a transport supply method of chemical vapor deposition used.
- the chemical vapor deposition raw material is vaporized by heating and / or depressurizing in the raw material container, and together with a carrier gas such as argon, nitrogen, helium, etc. used as needed, to the deposition reaction section.
- a carrier gas such as argon, nitrogen, helium, etc. used as needed.
- the chemical vapor deposition raw material is transported to the vaporization chamber in a liquid or solution state, vaporized by heating and / or decompressing in the vaporization chamber, and then transported to the deposition reaction section
- a carrier gas such as argon, nitrogen, helium, etc.
- the molybdenum amide compound represented by the above general formula (I) itself is a raw material for chemical vapor deposition
- the molybdenum amide compound represented by the above general formula (I) A solution in which the compound itself or the compound is dissolved in an organic solvent becomes a raw material for chemical vapor deposition.
- a chemical vapor deposition material is vaporized and supplied independently for each component (hereinafter sometimes referred to as a single source method), and a multi-component material is previously prepared.
- a method of vaporizing and supplying a mixed raw material mixed in a desired composition hereinafter sometimes referred to as a cocktail sauce method.
- a cocktail sauce method a mixture or a mixed solution of the molybdenum amide compound according to the present invention and another precursor is a raw material for chemical vapor deposition.
- the organic solvent used for the chemical vapor deposition raw material is not particularly limited and a known general organic solvent can be used.
- the organic solvent include acetates such as ethyl acetate, butyl acetate and methoxyethyl acetate; ether alcohols such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether and diethylene glycol monomethyl ether; tetrahydrofuran, Ethers such as tetrahydropyran, ethylene glycol dimethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, dibutyl ether, dioxane; methyl butyl ketone, methyl isobutyl ketone, ethyl butyl ketone, dipropyl ketone, diisobutyl ketone, methyl amyl ketone, cyclohexanone, methyl Ketones such as cyclo
- the solvent may be used alone or as a mixed solvent of two or more.
- the total amount of the molybdenum amide compound according to the present invention and other precursors in the organic solvent is 0.01 to 2.0 mol / liter, particularly 0.05 to 1.0 mol / liter. It is preferable to make it liter.
- Examples of other precursors include compounds of one or more organic coordination compounds such as alcohol compounds, glycol compounds, ⁇ -diketone compounds, cyclopentadiene compounds, and organic amine compounds, and silicon or metals.
- the precursor metal species include lithium, sodium, potassium, magnesium, calcium, strontium, barium, titanium, zirconium, hafnium, vanadium, niobium, tantalum, molybdenum, manganese, iron, ruthenium, cobalt, rhodium, iridium, nickel.
- Examples of the alcohol compound used as the organic ligand include alkyl alcohols such as methanol, ethanol, propanol, isopropanol, butanol, 2-butanol, isobutanol, t-butanol, amyl alcohol, isoamyl alcohol, and t-amyl alcohol.
- alkyl alcohols such as methanol, ethanol, propanol, isopropanol, butanol, 2-butanol, isobutanol, t-butanol, amyl alcohol, isoamyl alcohol, and t-amyl alcohol.
- glycol compound used as the organic ligand examples include 1,2-ethanediol, 1,2-propanediol, 1,3-propanediol, 2,4-hexanediol, 2,2-dimethyl-1, 3-propanediol, 2,2-diethyl-1,3-propanediol, 1,3-butanediol, 2,4-butanediol, 2,2-diethyl-1,3-butanediol, 2-ethyl-2 -Butyl-1,3-propanediol, 2,4-pentanediol, 2-methyl-1,3-propanediol, 2-methyl-2,4-pentanediol, 2,4-hexanediol, 2,4- Examples include dimethyl-2,4-pentanediol.
- Examples of the ⁇ -diketone compound used as the organic ligand include acetylacetone, hexane-2,4-dione, 5-methylhexane-2,4-dione, heptane-2,4-dione, 2-methylheptane- 3,5-dione, 5-methylheptane-2,4-dione, 6-methylheptane-2,4-dione, 2,2-dimethylheptane-3,5-dione, 2,6-dimethylheptane-3, 5-dione, 2,2,6-trimethylheptane-3,5-dione, 2,2,6,6-tetramethylheptane-3,5-dione, octane-2,4-dione, 2,2,6 -Trimethyloctane-3,5-dione, 2,6-dimethyloctane-3,5-dione, 2,9-dimethylnonane-4,6-dione 2-methyl-6-e
- Examples of the cyclopentadiene compound used as the organic ligand include cyclopentadiene, methylcyclopentadiene, ethylcyclopentadiene, propylcyclopentadiene, isopropylcyclopentadiene, butylcyclopentadiene, s-butylcyclopentadiene, isobutylcyclopentadiene, t-
- Examples of the organic amine compound used as the organic ligand include butylcyclopentadiene, dimethylcyclopentadiene, tetramethylcyclopentadiene, and the like.
- Examples include methylamine, ethylamine, propylamine, isopropylamine, butylamine, s-butylamine, t-butylamine, isobutylamine, dimethylamine, diethylamine, dipropylamine, diisopropylamine, ethylmethylamine, propylmethylamine, isopropylmethylamine It is done.
- the above-mentioned other precursors are preferably compounds having similar thermal and / or oxidative decomposition behavior, and in the case of the cocktail source method, the thermal and / or oxidative decomposition behavior is similar.
- a material that does not undergo alteration due to a chemical reaction during mixing is preferable.
- the raw material for chemical vapor deposition of the present invention should contain as little impurities metal elements as possible, impurities halogen such as impurity chlorine, and organic impurities as much as possible.
- the impurity metal element content is preferably 100 ppb or less for each element, more preferably 10 ppb or less, and the total amount is preferably 1 ppm or less, more preferably 100 ppb or less.
- an alkali metal element, an alkaline earth metal element, or a family element (chromium or tungsten) that affects the electrical characteristics of the obtained thin film. It is necessary to reduce the content.
- the impurity halogen content is preferably 100 ppm or less, more preferably 10 ppm or less, and even more preferably 1 ppm or less.
- the total amount of impurity organic components is preferably 500 ppm or less, more preferably 50 ppm or less, and even more preferably 10 ppm or less.
- each metal compound, organic solvent, and nucleophilic reagent is reduced in moisture. Therefore, it is better to remove moisture as much as possible before use.
- the water content of each of the metal compound, the organic solvent, and the nucleophilic reagent is preferably 10 ppm or less, and more preferably 1 ppm or less.
- the chemical vapor deposition material of the present invention contains as few particles as possible in order to reduce or prevent particle contamination of the thin film to be formed.
- the number of particles larger than 0.3 ⁇ m is preferably 100 or less in 1 ml of the liquid phase, and larger than 0.2 ⁇ m.
- the number of particles is more preferably 1000 or less in 1 ml of the liquid phase, and the number of particles larger than 0.2 ⁇ m is further preferably 100 or less in 1 ml of the liquid phase.
- the method for producing a thin film containing molybdenum oxide according to the present invention comprises a gas containing a molybdenum amide compound obtained by vaporizing the compound represented by the general formula (I), and another precursor used as necessary.
- the vaporized gas and the oxidizing gas are introduced onto the substrate, and then a molybdenum amide compound and other precursors used as necessary are decomposed and / or reacted on the substrate to grow a desired thin film on the substrate.
- This is due to the chemical vapor deposition method used for deposition.
- the oxidizing gas used in the method for producing a thin film containing molybdenum oxide of the present invention includes oxygen, singlet oxygen, ozone, carbon dioxide, nitrogen monoxide, nitrogen dioxide, water, hydrogen peroxide, formic acid, acetic acid, anhydrous An acetic acid etc. are mentioned, These can be used 1 type or 2 or more types. Since the residual carbon in the film can be further reduced, it is preferable to use one containing ozone, oxygen or water as the oxidizing gas.
- examples of the transport and supply method include the gas transport method, the liquid transport method, the single source method, and the cocktail sauce method described above.
- the deposition method includes a thermal CVD method in which a molybdenum amide compound (and other precursor gas) and a reactive gas are reacted only with heat to deposit a thin film, a plasma CVD method using heat and plasma, and heat and light.
- a photo-CVD method using a laser a photo-plasma CVD method using heat, light and plasma
- an ALD method in which the deposition reaction of the CVD method is divided into elementary processes and deposition is performed stepwise at the molecular level.
- examples of the manufacturing conditions include reaction temperature (substrate temperature), reaction pressure, and deposition rate.
- the reaction temperature is preferably 100 ° C. or more, more preferably 100 to 300 ° C., which is the temperature at which the molybdenum amide compound according to the present invention sufficiently reacts.
- the reaction pressure is preferably 0.01 to 300 Pa in the case of the thermal CVD method, the photo CVD method, and the plasma CVD method.
- the deposition rate can be controlled by the raw material supply conditions (vaporization temperature, vaporization pressure), reaction temperature, and reaction pressure. When the deposition rate is large, the properties of the obtained thin film may be deteriorated. When the deposition rate is small, the productivity may be problematic.
- the deposition rate is preferably 0.2 to 40.0 nm / min, and 4.0 to 25.0 nm. / Min is more preferable.
- the number of cycles is controlled so as to obtain a desired film thickness.
- a precursor thin film is formed on the substrate by the molybdenum amide compound introduced into the deposition reaction section after the raw material introduction step described above (precursor thin film). Film forming step). At this time, heat may be applied by heating the substrate or heating the deposition reaction part.
- the precursor thin film formed in this step is a molybdenum amide thin film or a thin film formed by decomposition and / or reaction of a part of the molybdenum amide compound, and has a composition different from that of the target molybdenum oxide thin film.
- the temperature at which this step is performed is preferably from room temperature to 500 ° C, more preferably from 100 to 300 ° C.
- unreacted molybdenum amide compound gas and by-product gas are exhausted from the deposition reaction part (exhaust process).
- the unreacted molybdenum amide compound gas or by-product gas is completely exhausted from the deposition reaction part, but it is not necessarily exhausted completely.
- the exhaust method include a method of purging the system with an inert gas such as helium and argon, a method of exhausting the system by depressurizing the system, a method combining these, and the like.
- the degree of pressure reduction is preferably 0.01 to 300 Pa, more preferably 0.1 to 100 Pa.
- an oxidizing gas is introduced into the deposition reaction portion, and a molybdenum oxide thin film is formed from the precursor thin film obtained in the precursor thin film forming step by the action of the oxidizing gas or the oxidizing gas and heat.
- the temperature when heat is applied in this step is preferably room temperature to 500 ° C, more preferably 100 to 300 ° C.
- the molybdenum amide compound according to the present invention has good reactivity with an oxidizing gas, and a molybdenum oxide thin film can be obtained.
- Thin film deposition by a series of operations consisting of the above-described raw material introduction process, precursor thin film formation process, exhaust process, and molybdenum oxide thin film formation process is defined as one cycle, and this cycle is repeated until a thin film having a required film thickness is obtained. May be repeated. In this case, after one cycle is performed, the next cycle is performed after exhausting unreacted molybdenum amide compound gas, oxidizing gas, and by-product gas from the deposition reaction portion in the same manner as the exhaust process. Is preferred.
- energy such as plasma, light, or voltage may be applied.
- the timing for applying these energies is not particularly limited. For example, when introducing a molybdenum amide compound gas in the raw material introduction process, heating in the molybdenum oxide thin film formation process or molybdenum oxide thin film formation process, and in the exhaust process At the time of evacuation, it may be at the time of introducing an oxidizing gas in the molybdenum oxide thin film forming step, or may be between the above steps.
- annealing may be performed in an inert atmosphere, an oxidizing gas or a reducing gas atmosphere in order to obtain better film quality, and step filling is necessary.
- a reflow process may be provided.
- the temperature is preferably 400 to 1200 ° C., particularly preferably 500 to 800 ° C.
- a known chemical vapor deposition apparatus can be used as the apparatus used in the method for producing a thin film of the present invention.
- the apparatus include a non-shower head type apparatus as shown in FIG. 1, an apparatus capable of carrying a precursor as shown in FIG. 2 by bubbling supply, and an apparatus having a vaporization chamber as shown in FIG. It is done.
- an apparatus capable of simultaneously processing a large number of sheets using a batch furnace can also be used.
- Examples of the thin film containing molybdenum oxide formed and manufactured using the chemical vapor deposition raw material of the present invention include molybdenum dioxide, molybdenum trioxide, molybdenum-sodium composite oxide, molybdenum-calcium composite oxide, Molybdenum-bismuth complex oxide, molybdenum-niobium complex oxide, molybdenum-zinc complex oxide, molybdenum-silicon complex oxide, molybdenum-cerium complex oxide, and these applications include electrodes, In addition to electronic parts such as barrier films, catalysts, catalyst raw materials, metal raw materials, metal surface treatment agents, ceramic additives, sintered metal additives, flame retardants, smoke reducing agents, antifreeze liquid raw materials, inorganic pigments Color formers, basic dye mordants, rust preventive raw materials, agricultural trace fertilizers, and ceramic auxiliary materials.
- the molybdenum amide compound according to the present invention is not particularly limited by the production method, and is produced by applying a known reaction.
- a production method a well-known general method for synthesizing metal amide compounds using the corresponding amide compound may be applied.
- a reactive intermediate is obtained by reacting molybdenum sodium salt, amine and trimethylchlorosilane in 1,2-dimethoxyethane, and then reacting with a dialkylamine.
- Examples of the reactive intermediate include molybdenum imide compounds represented by the following general formula (III).
- the following general formula obtained by reacting a reactive intermediate in which R 6 is a t-amyl group with a dialkylamine does not have a halogen atom typified by fluorine in its structure, and has a high vapor pressure or a low melting point compound that becomes liquid by slight heating. Therefore, in the production of thin films containing molybdenum oxide by chemical vapor deposition, it is useful as a raw material for chemical vapor deposition because it does not corrode devices due to reaction by-products, and is excellent in vaporization and precursor transport. It is.
- Comparative Example 1-2 was a solid, whereas Evaluation Examples 1 to 7 were liquids or low melting point compounds that became liquid by slight heating. Further, it was confirmed that the boiling points of Comparative Examples 1-1 and 1-2 and Evaluation Examples 1 to 5 were low.
- the comparative compounds 1 and 2 have low boiling points, the comparative compound 1 has a small difference between the melting point and the boiling point, and it is difficult to stably supply the raw material in a liquid state, and as a reaction by-product during film formation. There is a problem that the device is corroded by the generation of hydrogen fluoride, and Comparative Compound 2 has a smaller difference between the melting point and boiling point than Comparative Compound 1, and can stably supply the raw material in a liquid state.
- the molybdenum amide compound according to the present invention does not contain a halogen atom typified by a fluorine atom in the structure, and further has a large temperature difference between the melting point and the boiling point, so that it can be stably maintained in a liquid state. It was confirmed that it is suitable as a raw material for growth.
- Example 1 Production of molybdenum oxide thin film by ALD method A molybdenum oxide thin film was produced on a silicon wafer by the ALD method under the following conditions and steps using the apparatus shown in FIG. About the obtained thin film, the film thickness measurement by fluorescent X-rays, the composition ratio analysis by X-ray photoelectron spectroscopy, and the composition analysis by X-ray diffraction were performed. The results are shown in Table 3. (conditions) Reaction temperature (substrate temperature); 240 ° C., reactive gas; ozone gas (process) A series of steps consisting of the following (1) to (4) was taken as one cycle and repeated 50 cycles.
- the compound is a low melting point compound that becomes liquid at room temperature and normal pressure or becomes liquid by slight heating. Therefore, it was found that a molybdenum oxide thin film having excellent precursor transportability and supply property, and high productivity and good film quality can be produced.
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Abstract
Description
化合物No.37の製造
乾燥アルゴンガス雰囲気下で、500mL反応フラスコにモリブデン酸ナトリウム0.12モル、1,2-ジメトキシエタン2.52モル、t-アミルアミン0.252モル、トリエチルアミン0.48モル、トリメチルクロロシラン0.96モルを仕込み、系内の温度を80~82℃にコントロールして12時間攪拌を行った。反応液を0.2μmのフィルターで固形分をろ過した後、溶媒を減圧留去により濃縮することで深緑色スラリー状の反応性中間体を収率95%で得た。引き続き、反応フラスコに反応性中間体0.114モルと脱水処理を行ったトルエン1.12モルを加えて溶解した後、溶液を-20℃にドライアイス―イソプロパノールにより冷却し、ジメチルアミンガス0.48モルを吹き込み、続いて1.6mol/Lノルマルブチルリチウムのヘキサン溶液140mLを滴下して反応させた。反応溶液を徐々に室温へ戻し、引き続き2時間撹拌して反応させた。反応液を0.2μmのフィルターにより固形物をろ過後、溶媒を減圧留去により濃縮し、これからさらに減圧蒸留により195Pa、塔頂温度103~104℃のフラクションを分取し、目的物である化合物No.37を得た。この精製による回収率は60%であった。得られた橙黄色液体について、以下の分析を行った。
(1)元素分析(金属分析:ICP-AES、塩素分析:TOX)
モリブデン;26.89質量%(理論値27.07%)、Na;1ppm未満、Cl;5ppm未満
(2)1H-NMR(溶媒:重ベンゼン)(ケミカルシフト:多重度:H数)
(1.06:t:3)(1.35:s:6)(1.62:q:2)(3.46:s:6)
(3)TG-DTA
(Ar100ml/min、10℃/min昇温、サンプル量8.836mg)
50質量%減少温度190℃
化合物No.38の製造
乾燥アルゴンガス雰囲気下で、500mL反応フラスコにモリブデン酸ナトリウム0.12モル、1,2-ジメトキシエタン2.52モル、t-アミルアミン0.252モル、トリエチルアミン0.48モル、トリメチルクロロシラン0.96モルを仕込み、系内の温度を80~82℃にコントロールして12時間攪拌を行った。反応液を0.2μmのフィルターで固形分をろ過した後、溶媒を減圧留去により濃縮することで深緑色スラリー状の反応性中間体を収率95%で得た。引き続き、反応フラスコに反応性中間体0.114モルと脱水処理を行ったトルエン1.12モルを加えて溶解した後、溶液を-20℃にドライアイス―イソプロパノールにより冷却し、エチルメチルアミン0.48モルを滴下、続いて1.6mol/Lノルマルブチルリチウムのヘキサン溶液140mLを滴下して反応させた。反応溶液を徐々に室温へ戻し、引き続き2時間撹拌して反応させた。反応液を0.2μmのフィルターにより固形物をろ過後、溶媒を減圧留去により濃縮し、これからさらに減圧蒸留により40Pa、塔頂温度98~101℃のフラクションを分取し、目的物である化合物No.38を得た。この精製よる回収率は60%であった。得られた黄色液体について、以下の分析を行った。
(1)元素分析(金属分析:ICP-AES、塩素分析:TOX)
モリブデン;25.31質量%(理論値25.09%)、Na;1ppm未満、Cl;5ppm未満
(2)1H-NMR(溶媒:重ベンゼン)(ケミカルシフト:多重度:H数)
(1.02:t:2)(1.30:s:9)(1.59:q:3)(3.47:s:3)(3.67:q:2)
(3)TG-DTA
(Ar100ml/min、10℃/min昇温、サンプル量12.009mg)
50質量%減少温度209℃
上記製造実施例により得られた新規化合物No.37、38、公知化合物である化合物No.1、2、9、73、74及び以下に示す比較化合物1、2について、目視によって常温常圧における化合物の状態を観察し、固体化合物については微小融点測定装置を用いて融点を測定し、さらに各化合物の沸点を測定した。結果を表1に示す。
MoF6
比較化合物 2
Mo(CO)6
比較化合物2、化合物No.2、及び化合物No.37、38についてオゾン雰囲気下でTG-DTA測定を実施した。測定条件はオゾン4%を添加した酸素2000ml/min、10℃/min昇温で行った。モリブデン化合物とオゾンとの反応性の有無を、オゾンによるモリブデン化合物の酸化分解によって発生する重量減少を伴う発熱ピークの有無によって確認し、さらに反応が十分に終了したと考えられる300℃における残分量を確認した。尚、サンプル量は3.275mg~8.447mgであった。この結果を表2に示す。
化合物No.2を化学気相成長用原料とし、図1に示す装置を用いて以下の条件及び工程のALD法により、シリコンウエハ上に酸化モリブデン薄膜を製造した。得られた薄膜について、蛍光X線による膜厚測定及びX線光電子分光法による組成比分析、X線回折による組成分析を行った。結果を表3に示す。
(条件)
反応温度(基板温度);240℃、反応性ガス;オゾンガス
(工程)
下記(1)~(4)からなる一連の工程を1サイクルとして、50サイクル繰り返した。
(1)気化室温度70℃、気化室圧力70Paの条件で気化させた化学気相成長用原料の蒸気を導入し、系圧100Paで20秒間堆積させる。
(2)15秒間のアルゴンパージにより、未反応原料を除去する。
(3)反応性ガスを導入し、系圧力80Paで20秒間反応させる。
(4)15秒間のアルゴンパージにより、未反応原料を除去する。
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| US14/112,125 US20140141165A1 (en) | 2011-05-27 | 2012-05-11 | Method for manufacturing molybdenum oxide-containing thin film, starting material for forming molybdenum oxide-containing thin film, and molybdenum amide compound |
| KR1020137027972A KR101912127B1 (ko) | 2011-05-27 | 2012-05-11 | 산화몰리브덴을 함유하는 박막의 제조방법, 산화몰리브덴을 함유하는 박막의 형성용 원료 및 몰리브덴아미드 화합물 |
| CN201280020076.XA CN103562434A (zh) | 2011-05-27 | 2012-05-11 | 含有氧化钼的薄膜的制造方法、含有氧化钼的薄膜的形成用原料以及钼酰胺化合物 |
| US14/823,293 US9881796B2 (en) | 2011-05-27 | 2015-08-11 | Method for manufacturing molybdenum oxide-containing thin film |
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| US14/823,293 Division US9881796B2 (en) | 2011-05-27 | 2015-08-11 | Method for manufacturing molybdenum oxide-containing thin film |
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| KR20140025408A (ko) | 2014-03-04 |
| US9881796B2 (en) | 2018-01-30 |
| US20140141165A1 (en) | 2014-05-22 |
| US20150371859A1 (en) | 2015-12-24 |
| TWI546308B (zh) | 2016-08-21 |
| JP2012246531A (ja) | 2012-12-13 |
| KR101912127B1 (ko) | 2018-10-26 |
| JP5730670B2 (ja) | 2015-06-10 |
| TW201307362A (zh) | 2013-02-16 |
| CN103562434A (zh) | 2014-02-05 |
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