WO2015146311A1 - Al-Te-Cu-Zr合金からなるスパッタリングターゲット及びその製造方法 - Google Patents
Al-Te-Cu-Zr合金からなるスパッタリングターゲット及びその製造方法 Download PDFInfo
- Publication number
- WO2015146311A1 WO2015146311A1 PCT/JP2015/053326 JP2015053326W WO2015146311A1 WO 2015146311 A1 WO2015146311 A1 WO 2015146311A1 JP 2015053326 W JP2015053326 W JP 2015053326W WO 2015146311 A1 WO2015146311 A1 WO 2015146311A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- alloy
- phase
- sputtering target
- powder
- cute
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
- B22D7/005—Casting ingots, e.g. from ferrous metals from non-ferrous metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/16—Making metallic powder or suspensions thereof using chemical processes
- B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
- B22F9/20—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds
- B22F9/22—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds using gaseous reductors
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C28/00—Alloys based on a metal not provided for in groups C22C5/00 - C22C27/00
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
- C22C30/02—Alloys containing less than 50% by weight of each constituent containing copper
-
- C—CHEMISTRY; METALLURGY
- 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
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/14—Metallic material, boron or silicon
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B9/00—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor
- G11B9/04—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor using record carriers having variable electric resistance; Record carriers therefor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/34—Gas-filled discharge tubes operating with cathodic sputtering
- H01J37/3411—Constructional aspects of the reactor
- H01J37/3414—Targets
- H01J37/3426—Material
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N70/00—Solid-state devices having no potential barriers, and specially adapted for rectifying, amplifying, oscillating or switching
- H10N70/011—Manufacture or treatment of multistable switching devices
- H10N70/021—Formation of switching materials, e.g. deposition of layers
- H10N70/026—Formation of switching materials, e.g. deposition of layers by physical vapor deposition, e.g. sputtering
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N70/00—Solid-state devices having no potential barriers, and specially adapted for rectifying, amplifying, oscillating or switching
- H10N70/20—Multistable switching devices, e.g. memristors
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N70/00—Solid-state devices having no potential barriers, and specially adapted for rectifying, amplifying, oscillating or switching
- H10N70/801—Constructional details of multistable switching devices
- H10N70/881—Switching materials
- H10N70/882—Compounds of sulfur, selenium or tellurium, e.g. chalcogenides
- H10N70/8828—Tellurides, e.g. GeSbTe
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2201/00—Treatment under specific atmosphere
- B22F2201/01—Reducing atmosphere
- B22F2201/013—Hydrogen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2201/00—Treatment under specific atmosphere
- B22F2201/10—Inert gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2201/00—Treatment under specific atmosphere
- B22F2201/20—Use of vacuum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2301/00—Metallic composition of the powder or its coating
- B22F2301/05—Light metals
- B22F2301/052—Aluminium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2301/00—Metallic composition of the powder or its coating
- B22F2301/10—Copper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2301/00—Metallic composition of the powder or its coating
- B22F2301/20—Refractory metals
- B22F2301/205—Titanium, zirconium or hafnium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2304/00—Physical aspects of the powder
- B22F2304/05—Submicron size particles
- B22F2304/058—Particle size above 300 nm up to 1 micrometer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2304/00—Physical aspects of the powder
- B22F2304/10—Micron size particles, i.e. above 1 micrometer up to 500 micrometer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
Definitions
- the present invention relates to a sputtering target made of an Al—Te—Cu—Zr alloy and a method for producing the same, and in particular, Al—Te—Cu— for forming a thin film made of an Al—Te—Cu—Zr alloy which is a resistance variable material.
- the present invention relates to a Zr alloy sputtering target and a manufacturing method thereof.
- a thin film made of a Te—Al-based material or a Te—Zr-based material that records information using resistance change has been used as a resistance-change recording material.
- a method for forming a thin film made of these materials it is usually performed by means generally called physical vapor deposition such as vacuum vapor deposition or sputtering.
- the magnetron sputtering method is often used because of operability and film formation stability.
- a thin film is formed by sputtering, in which positive ions such as argon ions are physically collided with a target placed on the cathode, and the material constituting the target is released by the collision energy, and the substrate on the facing cathode side is released. This is done by stacking films having the same composition as the target material.
- Film formation by sputtering has a feature that a film can be formed from a thin film in angstrom units to a thick film of several tens of ⁇ m at a stable film formation speed by adjusting processing time, supply power, and the like.
- Te—Al-based alloy film which is a resistance change recording material
- a particular problem is that nodules are generated on the surface of the target during sputtering, causing particles and arcing.
- the Al—Te—Cu—Zr alloy target is composed of a large number of metal components having different film formation rates, there is a problem that nodule generation frequency is high and particle generation amount is also large. And the problem in the case of such a target and sputtering is a big cause which reduces the quality of the thin film which is a recording medium.
- Patent Document 1 includes one or more refractory metal elements selected from Ti, Zr, Hf, V, Nb, Ta, and lanthanoid elements.
- this alloy ingot is pulverized to form an alloy powder. By mixing Te powder and Ge powder into this alloy powder, sintering, It is disclosed to produce an AlCuGeTeZr target material (see Example 1).
- An object of the present invention is to solve the above-mentioned problems, in particular, to effectively suppress generation of particles, generation of nodules, etc. during sputtering, and further reduce Al contained in the target. It is an object of the present invention to provide a Te—Cu—Zr alloy sputtering target and a manufacturing method thereof.
- the present inventor has conducted intensive research.As a result, the film formation rate is made uniform by reducing the sputter rate difference between the phases constituting the sputtering target, and the crystal grains are made finer. Furthermore, it has been found that by reducing the oxygen content, generation of particles and generation of nodules can be suppressed, and the yield during film formation can be improved.
- Te is contained in 20 at% to 40 at%
- Cu is contained in 5 at to 20 at%
- Zr is contained in 5 at% to 15 at%
- the balance is made of Al
- Te phase, Cu phase and CuTe phase are contained in the target structure.
- Al-Te-Cu-Zr alloy sputtering target characterized by the absence of 2) The Al—Te—Cu—Zr alloy sputtering target according to 1) above, wherein an Al phase, CuAl phase, TeZr phase and Zr phase are present in the target structure, 3) The Al—Te—Cu—Zr alloy sputtering target according to 1) or 2) above, wherein the average particle size is 10 ⁇ m or less, 4) The Al—Te—Cu—Zr alloy sputtering target according to any one of 1) to 3) above, wherein the purity is 3N or more and the oxygen content is 3000 wtppm or less.
- Si, C, Ti, Hf, V, Nb, Ta, lanthanoid element, Ge, Zn, Co, Ni, Fe, Mg, Ga, S, or Se should contain an element.
- the present invention also provides: 7) A step of melting a Cu raw material and a Te raw material to produce a CuTe alloy ingot; a step of grinding a CuTe alloy ingot and then hot pressing the CuTe ground powder and the Zr raw material powder to produce a CuTeZr alloy; and a grinding of the CuTeZr alloy Then, a CuTeZr pulverized powder and an Al raw material powder are hot pressed to produce a CuTeZrAl alloy, and a method for producing an Al—Te—Cu—Zr alloy sputtering target, 8) Production of an Al—Te—Cu—Zr alloy sputtering target according to 7) above, wherein CuTeZr alloy is produced by hot pressing CuTe pulverized powder and Zr raw material powder at a temperature of 300 ° C.
- Production method 11) A step of dissolving a Cu raw material and a Te raw material to prepare a CuTe alloy ingot, a step of pulverizing a CuTe alloy ingot, and then hot-pressing the CuTe pulverized powder, the Zr raw material powder, and the Al raw material powder to produce a CuTeZrAl alloy,
- a method for producing an Al—Te—Cu—Zr alloy sputtering target comprising: 12) Al—Te—Cu—Zr alloy sputtering as described in 11) above, wherein CuTeZrAl alloy is produced by hot pressing CuTe pulverized powder, Zr raw material powder and Al raw material powder at a temperature of 300 ° C. to 600 ° C.
- Target manufacturing method 13) The above 6) to 12), characterized by using CuTe pulverized powder having an average particle diameter of 1 to 10 ⁇ m, Zr raw powder having an average particle diameter of 1 to 10 ⁇ m, and Al raw material powder having an average particle diameter of 1 to 10 ⁇ m.
- a method for producing an Al—Te—Cu—Zr alloy sputtering target according to any one of 14 The method for producing an Al—Te—Cu—Zr alloy sputtering target according to any one of 6) to 13) above, wherein the CuTe pulverized powder is reduced with hydrogen, 15) The Al—Te—Cu—Zr alloy sputtering target according to any one of 6) to 14) above, wherein in the step of pulverizing the CuTe alloy, the alloy is pulverized in an inert atmosphere or in a vacuum state.
- a manufacturing method is provided.
- the Al—Te—Cu—Zr alloy sintered sputtering target of the present invention can uniformize the deposition rate by alloying Te and Cu having a high sputtering rate with Al and Zr having a low sputtering rate.
- the crystal grains are miniaturized and the oxygen content is reduced, it has an excellent effect that generation of particles and nodules originating from these can be suppressed.
- 3 is an element mapping obtained by using FE-EPMA of the sintered body of Example 1.
- 4 is an element mapping obtained by using FE-EPMA of the sintered body of Example 2. It is a schematic diagram which shows the observation part by FE-EPMA of a sputtering target.
- the Al—Te—Cu—Zr alloy sputtering target of the present invention is composed of 20 at% to 40 at% of Te, 5 at to 20 at% of Cu, 5 at to 15 at% of Zr, and the balance of Al.
- the Each composition range is determined so that characteristics as a resistance-change recording material can be obtained.
- the alloy target of the present invention contains Al, Te, Cu, and Zr as main components, and other components can be added to improve various properties as a recording material.
- the Al—Te—Cu—Zr alloy sputtering target of the present invention is characterized in that a Te phase, a Cu phase and a CuTe phase are not present in the structure. Since the Te phase, Cu phase, and CuTe phase are easily sputtered and the film forming speed is increased, the absence of such a phase makes it possible to make the film forming speed uniform over the entire target. Moreover, since the CuTe phase is very active as described above, the handling can be facilitated by the absence of such a phase.
- “Te phase, Cu phase and CuTe phase do not exist” means a case where the area ratio of each phase is less than 5% in a mapping image obtained by observing a 2000-fold field of view with EPMA. Further, considering the possibility of segregation, the observation sites by EPMA should be a plurality of locations as shown in FIG. 3, and the area ratio of each phase should be less than 5% in at least half of the locations.
- the sputtering target of the present invention preferably contains an Al phase, a CuAl phase, a TeZr phase and a Zr phase in its structure.
- the average particle size is preferably 10 ⁇ m or less.
- the undulations on the surface of the sputtering target can be reduced by reducing the crystal grain size, thereby reducing the generation of nodules.
- the crystal grain size of the sputtering target varies greatly depending not only on the adjustment of the grain size of the raw material powder but also on the pulverization conditions and hot press conditions of the alloy ingot.
- the sputtering target of the present invention preferably has an oxygen content of 3000 wtppm or less.
- the oxygen content is more preferably 3N (99.9%) or more.
- the sputtering target of the present invention is mainly composed of Al, Te, Cu, and Zr as main components, but other components may be added to adjust the characteristics of devices such as resistance change memory. it can. For example, adding an element to one or more selected from Si, C, Ti, Hf, V, Nb, Ta, a lanthanoid element, Ge, Zn, Co, Ni, Fe, Mg, Ga, S, and Se Can do. These additives are preferably added at 0.1 wt% to 5.0 wt%, thereby improving the device performance.
- the relative density of the sputtering target of the present invention is preferably 90% or more. By using such a high-density target, good sputtering can be realized.
- the sintered body density is obtained by measuring the dimensions of the sintered body with calipers and calculating the volume and the measured weight.
- the theoretical density is as follows: Multiplying and summing up the obtained values
- Theoretical density ⁇ ⁇ (theoretical density of each raw material ⁇ mixing ratio) + (theoretical density of each raw material ⁇ mixing ratio) +.
- the Al—Te—Cu—Zr alloy sputtering target of the present invention can be produced, for example, by the following method.
- the CuTe sintered body that has been synthesized is pulverized.
- a general mill such as a stamp mill, a ball mill, a vibration mill, a pin mill, a hammer mill, and a jet mill can be used.
- the oxygen content can be reduced by subsequent hydrogen reduction.
- the CuTe pulverized powder thus pulverized can be made to have a particle size of 0.1 to 10 ⁇ m using a sieve.
- CuTeZr (Synthesis of CuTeZr) CuTe powder and Zr powder are mixed at a desired composition ratio, and sintered and synthesized by hot pressing.
- the sintering temperature can be 300 to 400 ° C. in the case of solid phase synthesis and 400 to 600 ° C. (however, 400 ° C. is not included) in the case of liquid phase synthesis.
- the particle size of the Zr powder is preferably 0.1 to 10 ⁇ m in order to promote the reaction between Te and Zr.
- the CuTeZr sintered body that has been synthesized is pulverized. For the pulverization, the same general ones as described above can be used.
- the structure of the sintered body obtained at this time is composed of a CuTe phase, a TeZr phase, and a Zr phase. Thereafter, the ground powder of CuTeZr can be made 0.1 to 10 ⁇ m using a sieve.
- CuTe powder, Zr powder, and Al powder can be mixed at a desired composition ratio, hot-pressed at a temperature of 300 to 600 ° C., and sintered and synthesized. If CuTeZr is synthesized, as described above, oxygen cannot be reduced by hydrogen reduction. Therefore, by combining the synthesis of CuTeZr and the synthesis of CuTeZrAl and simplifying the process, oxygen contamination is effectively suppressed. be able to. Even when manufactured by such a method, the structure of the obtained sintered body is composed of an Al phase, a CuAl phase, a TeZr phase, and a Zr phase.
- the additive elements listed above for improving device performance are preferably added in the following steps.
- Ge, Ga, S, Se, and Zn can be easily synthesized because of their low melting points, and they are relatively low in activity. Therefore, it is preferable to add them together when dissolving Cu and Te.
- C, Ti, Hf, V, Nb, Ta, lanthanoid elements, and Mg are difficult to synthesize due to their high melting points, and more active and difficult to deoxidize. Therefore, Zr powder and Al powder are mixed with CuTe powder. It is sometimes preferable to add them together. About other Si, Co, Ni, Fe, etc., it can add suitably in any of the above-mentioned processes.
- a CuTeZrAl sintered body synthesized by the above method or a sintered body to which other components are added can be used to produce a sputtering target having a predetermined shape by using machining such as cutting and polishing as necessary. .
- the Al—Te—Cu—Zr alloy sputtering target of the present invention having the above-described characteristics can be produced.
- a Cu wire rod and a Te shot having a size that fits into a synthesis ampoule were selected.
- raw materials were put into a high-purity quartz ampule and sealed in a vacuum.
- an ampoule one having an inner diameter of 80 mm and a length of 200 mm was used so that the temperature distribution was reduced and the molten metal was easily mixed uniformly.
- melting was performed for alloying. It was kept at 1000 ° C.
- this ingot was crushed with a stamp mill in the atmosphere.
- a clean hammer and pot were prepared in order to prevent contamination from the components during stamp milling.
- the amount of charge per pot was 400 g, and grinding was performed for 1 hour at a period of 60 Hz.
- classification was performed with a 90 ⁇ m sieve, and only the sieves were collected.
- sieving it injected
- the powder thus obtained was subjected to a hydrogen reduction treatment in order to further reduce oxygen. In the hydrogen reduction, the conditions were such that the oxygen was sufficiently reduced and the necking did not progress greatly. In this way, the oxygen content of the CuTe powder could be reduced from 680 wtppm to 80 wtppm.
- This raw material powder was filled in a graphite die having a diameter of 480 mm and hot pressed to produce a sintered body.
- the sintering conditions were a sintering temperature of 325 ° C. (solid phase reaction), a press pressure of 300 kgf / cm 2 , a holding time of 4 hours, and then a sintering temperature of 400 ° C. (solid phase reaction), a press pressure of 300 kgf / cm 2 , Sintering was performed for a holding time of 4 hours. In addition, all sintering was performed in the vacuum atmosphere.
- the mapping image of EPMA is shown in FIG. From FIG. 1, it was confirmed that the sintered body structure was composed of a TeZr phase and a Zr phase.
- this sintered body was pulverized by a stamp mill in an Ar atmosphere containing 10 ppm or less oxygen.
- the pulverizing conditions were the same as those when the CuTe ingot was pulverized. Thereafter, classification was performed with a 90 ⁇ m sieve, and only the sieves were collected. In addition, about sieving, it injected
- This raw material powder was filled in a graphite die having a diameter of 480 mm and hot pressed to produce a sintered body.
- the sintering conditions were a sintering temperature of 400 ° C., a press pressure of 300 kgf / cm 2 , a holding time of 4 hours, and an argon atmosphere.
- the mapping image of EPMA is shown in FIG. From FIG. 2, it was confirmed that the sintered body structure was composed of an Al phase, a CuAl phase, a TeZr phase, and a Zr phase.
- an Al—Te—Cu—Zr alloy sintered body having a purity of 3N or more, an oxygen concentration of 3000 wtppm, a relative density of 90%, and an average particle size of 8 ⁇ m was obtained.
- the sintered body was machined to produce a sputtering target, and sputtering was performed using the obtained target.
- micro arcing due to nodules and oxides was remarkably reduced, and the number of particles (0.2 ⁇ m or more) was 20 or less, and the particle generation rate was extremely low.
- Example 2 A sintered body was produced under the same conditions as in Example 1 except that the sintering temperature (maximum) of the mixed powder of CuTe powder and Zr powder was changed from 400 ° C. to 500 ° C. (liquid phase reaction). As a result, an Al—Te—Cu—Zr alloy sintered body having a purity of 3N or more, an oxygen concentration of 2900 wtppm, a relative density of 93%, and an average particle size of 9 ⁇ m was obtained. Moreover, it confirmed that a sintered compact structure
- Example 3 The CuTe powder having a particle size of 90 ⁇ m or less prepared in Example 1 was further crushed by a jet mill. The maximum particle size after pulverization was 5 ⁇ m, and the oxygen content was 680 wtppm. Next, hydrogen reduction was performed under the same conditions as in Example 1 to obtain a low oxygen powder having an oxygen concentration of 80 wtppm.
- This raw material powder was filled in a graphite die having a diameter of 480 mm and hot pressed to produce a sintered body.
- the sintering conditions were a sintering temperature of 325 ° C., a press pressure of 300 kgf / cm 2 , a holding time of 4 hours, and then a sintering temperature of 400 ° C., a press pressure of 300 kgf / cm 2 , a holding time of 4 Sintering was performed in an argon atmosphere for a time.
- an Al—Te—Cu—Zr alloy sintered body having a purity of 3N or more, an oxygen concentration of 1900 wtppm, a relative density of 94%, and an average particle size of 7 ⁇ m was obtained.
- tissue was comprised from Al phase, CuAl phase, TeZr phase, and Zr phase.
- the sintered body was machined to produce a sputtering target, and sputtering was performed using the obtained target. As a result, the number of particles (0.2 ⁇ m or more) was extremely small, 25.
- Example 4 A sintered body was produced under the same conditions as in Example 1 except that the composition ratio of Al, Te, Cu, and Zr was changed as shown in Table 1. As a result, an Al—Te—Cu—Zr alloy sintered body having a purity of 3N or more, an oxygen concentration of 2700 wtppm, a relative density of 90%, and an average particle size of 8 ⁇ m was obtained. Moreover, it confirmed that a sintered compact structure
- Example 5 A sintered body was produced under the same conditions as in Example 2 except that the composition ratio of Al, Te, Cu, and Zr was changed as shown in Table 1. As a result, an Al—Te—Cu—Zr alloy sintered body having a purity of 3N or more, an oxygen concentration of 2400 wtppm, a relative density of 93%, and an average particle size of 9 ⁇ m was obtained. Moreover, it confirmed that a sintered compact structure
- Example 6 A sintered body was produced under the same conditions as in Example 3 except that Ga was added as an additive element so as to have the composition shown in Table 1 when Cu and Te were dissolved.
- an Al—Te—Cu—Zr alloy (containing Ga) sintered body having a purity of 3N or more, an oxygen concentration of 2800 wtppm, a relative density of 92%, and an average particle diameter of 6 ⁇ m was obtained.
- a sintered compact structure was comprised from Al phase, CuAl phase, CuGa phase, TeZr phase, and Zr phase.
- the sintered body was machined to produce a sputtering target, and sputtering was performed using the obtained target. As a result, the number of particles (0.2 ⁇ m or more) was extremely small as 39.
- Example 7 A sintered body was produced under the same conditions as in Example 3 except that S was added as an additive element so as to have the composition shown in Table 1 when Cu and Te were dissolved.
- an Al—Te—Cu—Zr alloy (containing S) sintered body having a purity of 3N or more, an oxygen concentration of 2800 wtppm, a relative density of 90%, and an average particle diameter of 6 ⁇ m was obtained.
- tissue was comprised from Al phase, CuAl phase, CuS phase, TeZr phase, and Zr phase.
- the sintered body was machined to produce a sputtering target, and sputtering was performed using the obtained target. As a result, the number of particles (0.2 ⁇ m or more) was extremely small at 21.
- Example 8 A sintered body was produced under the same conditions as in Example 3 except that Ti powder was added as an additive element so as to have the composition shown in Table 1 during the sintering of CuTe powder, Zr powder, and Al powder. At this time, the Ti powder had a maximum particle size of 10 ⁇ m and an oxygen concentration of 7900 wtppm. As a result, an Al—Te—Cu—Zr alloy (containing Ti) sintered body having a purity of 3N or more, an oxygen concentration of 2600 wtppm, a relative density of 95%, and an average particle size of 8 ⁇ m was obtained.
- tissue was comprised from Al phase, CuAl phase, TeZr phase, Ti phase, and Zr phase.
- the sintered body was machined to produce a sputtering target, and sputtering was performed using the obtained target.
- the number of particles (0.2 ⁇ m or more) was extremely small, 27.
- Example 9 Ge is added as an additive element at the time of dissolution of Cu and Te so as to have the composition shown in Table 1. Further, C powder is added as an additive element at the time of sintering CuGeTe powder, Zr powder, and Al powder. A sintered body was produced under the same conditions as in Example 3 except that the addition was performed. At this time, the Ti powder had a maximum particle size of 2 ⁇ m and an oxygen concentration of 3100 wtppm. As a result, an Al—Te—Cu—Zr alloy (containing Ge and C) sintered body having a purity of 3N or higher, an oxygen concentration of 2700 wtppm, a relative density of 91%, and an average particle size of 9 ⁇ m was obtained.
- a sintered compact structure was comprised from Al phase, C phase, CuAl phase, GeTe phase, TeZr phase, and Zr phase.
- the sintered body was machined to produce a sputtering target, and sputtering was performed using the obtained target.
- the number of particles (0.2 ⁇ m or more) was extremely small at 16.
- Example 10 Composition of which Se is added as an additive element at the time of dissolution of Cu and Te so as to have the composition shown in Table 1, and Si powder is added as an additive element at the time of sintering CuSeTe powder, Al powder and Zr powder.
- a sintered body was produced under the same conditions as in Example 3 except that the addition was performed.
- the Si powder had a maximum particle size of 2 ⁇ m and an oxygen concentration of 1600 wtppm.
- an Al—Te—Cu—Zr alloy (containing Se and Si) sintered body having a purity of 3N or more, an oxygen concentration of 2900 wtppm, a relative density of 91%, and an average particle diameter of 7 ⁇ m was obtained.
- a sintered compact structure was comprised from Al phase, CuAl phase, Si phase, SeTeZr phase, and Zr phase.
- the sintered body was machined to produce a sputtering target, and sputtering was performed using the obtained target.
- the number of particles (0.2 ⁇ m or more) was extremely small as 33.
- Sintering conditions were as follows: sintering temperature 370 ° C., press pressure 300 kgf / cm 2 , holding time 4 hours, and sintering in an argon atmosphere.
- an Al—Te—Cu—Zr alloy sintered body having a purity of 3N or more, an oxygen concentration of 2600 wtppm, a relative density of 95%, and an average particle diameter of 7 ⁇ m was obtained.
- tissue was comprised from Al phase, Cu phase, CuTe phase, CuTeZr phase, TeZr phase, and Zr.
- the sintered body was machined to produce a sputtering target, and sputtering was performed using the obtained target. As a result, the number of particles (0.2 ⁇ m or more) was remarkably increased to 468.
- Example 2 A sintered body was produced under the same conditions as in Example 1 except that the sintering temperature (maximum) of the mixed powder of CuTeZr powder and Al powder was changed from 400 ° C to 370 ° C. As a result, an Al—Te—Cu—Zr alloy sintered body having a purity of 3N or more, an oxygen concentration of 3600 wtppm, a relative density of 83%, and an average particle size of 9 ⁇ m was obtained. Moreover, it confirmed that a sintered compact structure
- Example 3 The CuTeZr sintered body was pulverized in an Ar atmosphere with oxygen of 10 ppm or less and then left in the air for 30 minutes. As a result, the oxygen concentration increased from 450 wtppm to 820 wtppm. A sintered body was produced under the same conditions as in Example 1 except that this CuTeZr powder was used as a raw material powder. As a result, an Al—Te—Cu—Zr alloy sintered body having a purity of 3N or higher, an oxygen concentration of 3600 wtppm, a relative density of 95%, and an average particle size of 8 ⁇ m was obtained.
- tissue was comprised from Al phase, CuAl phase, TeZr phase, and Zr phase.
- the sintered body was machined to produce a sputtering target, and sputtering was performed using the obtained target.
- the number of particles (0.2 ⁇ m or more) increased to 309.
- Example 4 A sintered body was produced under the same conditions as in Example 1 except that the composition ratio of Al, Te, Cu, and Zr was changed as shown in Table 1. As a result, an Al—Te—Cu—Zr alloy sintered body having a purity of 3N or more, an oxygen concentration of 3000 wtppm, a relative density of 90%, and an average particle size of 8 ⁇ m was obtained. Moreover, it confirmed that a sintered compact structure
- Example 5 A sintered body was produced under the same conditions as in Example 1 except that the composition ratio of Al, Te, Cu, and Zr was changed as shown in Table 1. As a result, an Al—Te—Cu—Zr alloy sintered body having a purity of 3N or more, an oxygen concentration of 2600 wtppm, a relative density of 92%, and an average particle size of 5 ⁇ m was obtained. Moreover, it confirmed that a sintered compact structure
- Example 6 A sintered body was produced under the same conditions as in Example 6 except that the maximum particle size of the raw material powder, CuGaTe powder, Zr powder, and Al powder was changed to 150 ⁇ m. As a result, an Al—Te—Cu—Zr alloy sintered body having a purity of 3N or more, an oxygen concentration of 2700 wtppm, a relative density of 93%, and an average particle size of 15 ⁇ m was obtained. Moreover, it confirmed that a sintered compact structure
- the Al—Te—Cu—Zr alloy sintered compact sputtering target of the present invention has few phases constituting the structure, the film forming rate can be made uniform, the crystal grain size is fine, and the oxygen content is small. Therefore, it is possible to suppress the generation of particles and the generation of nodules starting from these points. Therefore, the present invention is useful for stably supplying a thin film made of an Al—Te alloy, which is a high-quality variable resistance recording material.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Analytical Chemistry (AREA)
- Physical Vapour Deposition (AREA)
- Powder Metallurgy (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Semiconductor Memories (AREA)
Abstract
Description
1)Teを20at%~40at%含有し、Cuを5at~20at%含有し、Zrを5at%~15at%含有し、残部がAlからなり、ターゲット組織中に、Te相、Cu相及びCuTe相が存在しないことを特徴とするAl-Te-Cu-Zr合金スパッタリングターゲット、
2)ターゲット組織中に、Al相、CuAl相、TeZr相及びZr相が存在することを特徴とする上記1)記載のAl-Te-Cu-Zr合金スパッタリングターゲット、
3)平均粒径が10μm以下であることを特徴とする上記1)又は2)記載のAl-Te-Cu-Zr合金スパッタリングターゲット、
4)純度が3N以上であり、酸素含有量が3000wtppm以下であることを特徴とする上記1)~3)のいずれか一に記載のAl-Te-Cu-Zr合金スパッタリングターゲット、
5)Si、C、Ti、Hf、V、Nb、Ta、ランタノイド元素、Ge、Zn、Co、Ni、Fe、Mg、Ga、S、Seから選択されるいずれか一種以上に元素を含有することを特徴とする上記1)~4)のいずれか一に記載のAl-Te-Cu-Zr合金スパッタリングターゲット、
6)相対密度が90%以上であることを特徴とする上記1)~5)のいずれか一に記載のAl-Te-Cu-Zr合金スパッタリングターゲット、を提供する。
7)Cu原料とTe原料を溶解してCuTe合金インゴットを作製する工程、CuTe合金インゴットを粉砕した後、CuTe粉砕粉とZr原料粉をホットプレスしてCuTeZr合金を作製する工程、CuTeZr合金を粉砕した後、CuTeZr粉砕粉とAl原料粉をホットプレスしてCuTeZrAl合金を作製する工程、からなることを特徴とするAl-Te-Cu-Zr合金スパッタリングターゲットの製造方法、
8)CuTe粉砕粉とZr原料粉を300℃~400℃の温度でホットプレスして、CuTeZr合金を作製することを特徴とする上記7)記載のAl-Te-Cu-Zr合金スパッタリングターゲットの製造方法、
9)CuTe粉砕粉とZr原料粉を400℃~600℃の温度でホットプレスして、CuTeZr合金を作製することを特徴とする上記7)記載のAl-Te-Cu-Zr合金スパッタリングターゲットの製造方法、
10)CuTeZr合金を粉砕する工程において、不活性雰囲気又は真空状態で合金を粉砕することを特徴とする上記7)~9)のいずれか一に記載のAl-Te-Cu-Zr合金スパッタリングターゲットの製造方法、
11)Cu原料とTe原料を溶解してCuTe合金インゴットを作製する工程、CuTe合金インゴットを粉砕した後、CuTe粉砕粉とZr原料粉とAl原料粉をホットプレスしてCuTeZrAl合金を作製する工程、からなることを特徴とするAl-Te-Cu-Zr合金スパッタリングターゲットの製造方法、
12)CuTe粉砕粉とZr原料粉とAl原料粉を300℃~600℃の温度でホットプレスしてCuTeZrAl合金を作製することを特徴とする上記11)記載のAl-Te-Cu-Zr合金スパッタリングターゲットの製造方法、
13)平均粒径が1~10μmのCuTe粉砕粉、平均粒径が1~10μmのZr原料粉、平均粒径が1~10μmのAl原料粉を用いることを特徴とする上記6)~12)のいずれか一に記載のAl-Te-Cu-Zr合金スパッタリングターゲットの製造方法、
14)CuTe粉砕粉を水素還元することを特徴とする上記6)~13)のいずれか一に記載のAl-Te-Cu-Zr合金スパッタリングターゲットの製造方法、
15)CuTe合金を粉砕する工程において、不活性雰囲気又は真空状態で合金を粉砕することを特徴とする上記6)~14)のいずれか一に記載のAl-Te-Cu-Zr合金スパッタリングターゲットの製造方法、を提供する。
相対密度={(焼結体の密度)/(理論密度)}×100
但し、前記焼結体密度は、焼結体の寸法をノギスで測長し、その体積と測定重量から算出し、理論密度は、下記に示すように、原料の単体密度それぞれに、混合質量比を掛け、得られた値を合計して求める
理論密度=Σ{(各原料の理論密度×混合比)+(各原料の理論密度×混合比)+・・・}
まず、Cu原料、Te原料を準備し、これらの原料を所望の組成比となるように秤量する。次に、これらの原料を石英アンプルに投入し、真空封止を行った後、搖動式合成炉にて合成処理を行う。溶解温度は、CuとTeが十分に溶解するように、1000~1300℃、とするのが好ましい。溶解後は炉内で冷却する。このとき得られる焼結体の組織は、CuTe相とTe相から構成される。なお、CuTeZrを一度に合成することも考えられるが、Teの蒸気圧が高く、組成ずれを起こすことから、まずCuTeを作製し、その後、Zrを添加することでCuTeZrの合成を行うことが好ましい。
CuTe粉とZr粉を所望の組成比で混合し、ホットプレスにより焼結、合成する。焼結温度は、固相合成する場合には、300~400℃とし、液相合成する場合には、400~600℃(但し、400℃は含まない)とすることができる。また、Zr粉の粒径は、TeとZrとの反応を促進させるために、0.1~10μmとすることが好ましい。次に、合成が完了したCuTeZr焼結体を粉砕する。粉砕は、前記と同様一般的なものを使用することができる。CuTeZrは水素還元による酸素含有量の低減は難しいため、粉砕粉の酸化を防止するため、真空又は不活性雰囲気で処理することが望ましい。このとき得られる焼結体の組織は、CuTe相、TeZr相及びZr相から構成される。その後、CuTeZrの粉砕粉は、篩を用いて、0.1~10μmとすることができる。
CuTeZr粉とAl粉を所望の組成比で混合し、ホットプレスにより焼結、合成する。焼結温度は、CuTeZrとAlとの合成反応を行うために、300~600℃とするのが好ましい。また、Al粉の粒径は、CuTeZrとの反応を促進させるために0.1~10μmとすることが好ましい。これにより、Al相、CuAl相、CuTe相、TeZr相及びZr相からなる組織の焼結体を得ることができる。
デバイス性能を向上させるために上記に掲げた添加元素は、以下の工程で添加することが好ましい。Ge、Ga、S、Se及びZnについては、融点が低いため容易に合成ができ、さらに比較的活性が低いため、Cu、Teを溶解するときに、併せて添加することが好ましい。C、Ti、Hf、V、Nb、Ta、ランタノイド元素及びMgについては、融点が高いため合成が難しく、さらに活性が高く脱酸素が困難であるため、CuTe粉にZr粉やAl粉を混合するときに、併せて添加することが好ましい。この他のSi、Co、Ni、Feなどについては、前記いずれの工程においても、適宜添加することができる。
純度4NのCu原料、純度5NのTe原料を、Cu:Te=30:70(at%)の組成となるように秤量した。原料には、合成用アンプルに入る大きさのCu線材、Teショットを選択した。次に、溶解中の酸化と外部からのコンタミ防止のため、高純度石英アンプル内に原料を投入し、真空封止した。アンプル選定に際し、温度分布が小さくなるよう、さらには溶湯が均一に混じりやすいように内径80mm、長さ200mmのものを使用した。次に、合金化させるために溶解を実施した。CuとTeとが十分に反応、溶解するように1000℃で4時間保持した。その際、溶湯を均一にするために周期30Hzで搖動させた。溶解終了後は、炉内で室温まで徐冷して、鋳造インゴットを作製した。以上により、純度4Nの高純度CuTeのインゴットが得られた。
CuTe粉とZr粉の混合粉の焼結温度(最高)を400℃から500℃(液相反応)に変更した以外は、実施例1と同様の条件にて焼結体を作製した。これにより、純度3N以上、酸素濃度2900wtppmm、相対密度93%、平均粒径9μmのAl-Te-Cu-Zr合金焼結体が得られた。また、焼結体組織がAl相、CuAl相、TeZr相及びZr相とから構成されることを確認した。次に、この焼結体を機械加工して作製したーゲットを実施例1と同様の条件でスパッタリングを行った結果、パーティクル(0.2μm以上)は18個と極めて少なくなった。
実施例1で作製した粒径90μm以下のCuTe粉をさらにジェットミル粉砕した。粉砕後の最大粒径は5μm、酸素量は680wtppmであった。次に、実施例1と同条件で水素還元を行い、酸素濃度80wtppmの低酸素粉末を得た。このようにして作製した最大粒径5μmで酸素濃度80wtppmのCuTe粉末、最大粒径10μmで酸素濃度5100wtppmのAl粉、最大粒径10μmで酸素濃度8000wtppmのZr粉末を、実施例1と同じ組成となるよう秤量・混合した。この原料粉を直径480mmのグラファイトダイスに充填して、ホットプレスを行い、焼結体を作製した。焼結条件は、実施例1と同様に、焼結温度325℃、プレス圧力300kgf/cm2、保持時間4時間とし、その後さらに、焼結温度400℃、プレス圧力300kgf/cm2、保持時間4時間、アルゴン雰囲気で焼結を行った。以上により、純度3N以上、酸素濃度1900wtppmm、相対密度94%、平均粒径7μmのAl-Te-Cu-Zr合金焼結体が得られた。また、焼結体組織がAl相、CuAl相、TeZr相及びZr相とから構成されることを確認した。この焼結体を機械加工してスパッタリングターゲットを作製し、得られたターゲットを使用してスパッタリングを行った。その結果、パーティクル(0.2μm以上)は25個と極めて少なくなった。
Al、Te、Cu、Zrの組成比を表1に示すように変更したこと以外、実施例1と同様の条件にて焼結体を作製した。これにより、純度3N以上、酸素濃度2700wtppmm、相対密度90%、平均粒径8μmのAl-Te-Cu-Zr合金焼結体が得られた。また、焼結体組織がAl相、CuAl相、TeZr相及びZr相とから構成されることを確認した。この焼結体を機械加工してスパッタリングターゲットを作製し、得られたターゲットを使用してスパッタリングを行った。その結果、パーティクル(0.2μm以上)は20個と極めて少なくなった。
Al、Te、Cu、Zrの組成比を表1に示すように変更したこと以外、実施例2と同様の条件にて焼結体を作製した。これにより、純度3N以上、酸素濃度2400wtppmm、相対密度93%、平均粒径9μmのAl-Te-Cu-Zr合金焼結体が得られた。また、焼結体組織がAl相、CuAl相、TeZr相及びZr相とから構成されることを確認した。この焼結体を機械加工してスパッタリングターゲットを作製し、得られたターゲットを使用してスパッタリングを行った。その結果、パーティクル(0.2μm以上)は18個と極めて少なくなった。
Cu、Teの溶解時に添加元素としてGaを表1に示される組成となるように添加したこと以外、実施例3と同様の条件にて焼結体を作製した。これにより、純度3N以上、酸素濃度2800wtppmm、相対密度92%、平均粒径6μmのAl-Te-Cu-Zr合金(Gaを含有)焼結体が得られた。また、焼結体組織がAl相、CuAl相、CuGa相、TeZr相及びZr相とから構成されることを確認した。この焼結体を機械加工してスパッタリングターゲットを作製し、得られたターゲットを使用してスパッタリングを行った。その結果、パーティクル(0.2μm以上)は39個と極めて少なくなった。
Cu、Teの溶解時に添加元素としてSを表1に示される組成となるように添加したこと以外、実施例3と同様の条件にて焼結体を作製した。これにより、純度3N以上、酸素濃度2800wtppmm、相対密度90%、平均粒径6μmのAl-Te-Cu-Zr合金(Sを含有)焼結体が得られた。また、焼結体組織がAl相、CuAl相、CuS相、TeZr相及びZr相とから構成されることを確認した。この焼結体を機械加工してスパッタリングターゲットを作製し、得られたターゲットを使用してスパッタリングを行った。その結果、パーティクル(0.2μm以上)は21個と極めて少なくなった。
CuTe粉、Zr粉、Al粉の焼結時に添加元素としてTi粉を表1に示される組成となるように添加したこと以外、実施例3と同様の条件にて焼結体を作製した。このとき、Ti粉は、最大粒径10μm、酸素濃度7900wtppmであった。これにより、純度3N以上、酸素濃度2600wtppmm、相対密度95%、平均粒径8μmのAl-Te-Cu-Zr合金(Tiを含有)焼結体が得られた。また、焼結体組織がAl相、CuAl相、TeZr相、Ti相及びZr相とから構成されることを確認した。この焼結体を機械加工してスパッタリングターゲットを作製し、得られたターゲットを使用してスパッタリングを行った。その結果、パーティクル(0.2μm以上)は27個と極めて少なくなった。
Cu、Teの溶解時に添加元素としてGeを表1に示される組成となるように添加し、さらに、CuGeTe粉、Zr粉、Al粉の焼結時に添加元素としてC粉を表1に示される組成となるように添加したこと以外、実施例3と同様の条件にて焼結体を作製した。このとき、Ti粉は、最大粒径2μm、酸素濃度3100wtppmであった。これにより、純度3N以上、酸素濃度2700wtppmm、相対密度91%、平均粒径9μmのAl-Te-Cu-Zr合金(Ge、Cを含有)焼結体が得られた。また、焼結体組織がAl相、C相、CuAl相、GeTe相、TeZr相及びZr相とから構成されることを確認した。この焼結体を機械加工してスパッタリングターゲットを作製し、得られたターゲットを使用してスパッタリングを行った。その結果、パーティクル(0.2μm以上)は16個と極めて少なくなった。
Cu、Teの溶解時に添加元素としてSeを表1に示される組成となるように添加し、さらに、CuSeTe粉、Al粉、Zr粉の焼結時に添加元素としてSi粉を表1に示される組成となるように添加したこと以外、実施例3と同様の条件にて焼結体を作製した。このとき、Si粉は、最大粒径2μm、酸素濃度1600wtppmであった。これにより、純度3N以上、酸素濃度2900wtppmm、相対密度91%、平均粒径7μmのAl-Te-Cu-Zr合金(Se、Siを含有)焼結体が得られた。また、焼結体組織がAl相、CuAl相、Si相、SeTeZr相及びZr相とから構成されることを確認した。この焼結体を機械加工してスパッタリングターゲットを作製し、得られたターゲットを使用してスパッタリングを行った。その結果、パーティクル(0.2μm以上)は33個と極めて少なくなった。
平均粒径40μmで酸素濃度100wtppmのCu粉、平均粒径30μmで酸素濃度100wtppmのTe粉、平均粒径40μmで酸素濃度8000wtppmのZr粉、平均粒径40μmで酸素濃度100wtppmのAl粉を、実施例1と同じ組成となるよう秤量・混合した。この原料粉を直径480mmのグラファイトダイスに充填して、ホットプレスを行い、焼結体を作製した。焼結条件は、焼結温度370℃、プレス圧力300kgf/cm2、保持時間4時間、アルゴン雰囲気で焼結を行った。以上により、純度3N以上、酸素濃度2600wtppmm、相対密度95%、平均粒径7μmのAl-Te-Cu-Zr合金焼結体が得られた。また、焼結体組織がAl相、Cu相、CuTe相、CuTeZr相、TeZr相及びZrとから構成されることを確認した。この焼結体を機械加工してスパッタリングターゲットを作製し、得られたターゲットを使用してスパッタリングを行った。その結果、パーティクル(0.2μm以上)は468個と著しく増加していた。
CuTeZr粉とAl粉の混合粉の焼結温度(最高)を400℃から370℃に変更したこと以外、実施例1と同様の条件にて焼結体を作製した。これにより、純度3N以上、酸素濃度3600wtppmm、相対密度83%、平均粒径9μmのAl-Te-Cu-Zr合金焼結体が得られた。また、焼結体組織がAl相、CuAl相、TeZr相及びZr相とから構成されることを確認した。この焼結体を機械加工してスパッタリングターゲットを作製し、得られたターゲットを使用してスパッタリングを行った。その結果、パーティクル(0.2μm以上)は221個と増加した。
CuTeZr焼結体を酸素10ppm以下のAr雰囲気で粉砕後、30分間大気中に放置した。その結果、酸素濃度が450wtppmから820wtppmに増加した。このCuTeZr粉を原料粉としたこと以外は、実施例1と同様の条件にて焼結体を作製した。これにより、純度3N以上、酸素濃度3600wtppmm、相対密度95%、平均粒径8μmのAl-Te-Cu-Zr合金焼結体が得られた。また、焼結体組織がAl相、CuAl相、TeZr相及びZr相とから構成されることを確認した。この焼結体を機械加工してスパッタリングターゲットを作製し、得られたターゲットを使用してスパッタリングを行った。その結果、パーティクル(0.2μm以上)は309個と増加した。
Al、Te、Cu、Zrの組成比を表1に示すように変更したこと以外、実施例1と同様の条件にて焼結体を作製した。これにより、純度3N以上、酸素濃度3000wtppmm、相対密度90%、平均粒径8μmのAl-Te-Cu-Zr合金焼結体が得られた。また、焼結体組織がAl相、CuAl相、TeZr相及びZr相とから構成されることを確認した。この焼結体を機械加工してスパッタリングターゲットを作製し、得られたターゲットを使用してスパッタリングを行った。その結果、パーティクル(0.2μm以上)は54個と少なくなった。しかし、このような組成では、十分なデバイス特性を得ることができなかった。
Al、Te、Cu、Zrの組成比を表1に示すように変更したこと以外、実施例1と同様の条件にて焼結体を作製した。これにより、純度3N以上、酸素濃度2600wtppmm、相対密度92%、平均粒径5μmのAl-Te-Cu-Zr合金焼結体が得られた。また、焼結体組織がAl相、CuAl相、TeZr相及びZr相とから構成されることを確認した。この焼結体を機械加工してスパッタリングターゲットを作製し、得られたターゲットを使用してスパッタリングを行った。その結果、パーティクル(0.2μm以上)は35個と少なくなった。しかし、このような組成では、十分なデバイス特性を得ることができなかった。
原料粉であるCuGaTe粉、Zr粉、Al粉の最大粒径を150μmに変更したこと以外は、実施例6と同様の条件にて焼結体を作製した。これにより、純度3N以上、酸素濃度2700wtppmm、相対密度93%、平均粒径15μmのAl-Te-Cu-Zr合金焼結体が得られた。また、焼結体組織がAl相、CuAl相、TeZr相及びZr相とから構成されることを確認した。この焼結体を機械加工してスパッタリングターゲットを作製し、得られたターゲットを使用してスパッタリングを行った。その結果、パーティクル(0.2μm以上)は134個と増加した。
Claims (15)
- Teを20at%~40at%含有し、Cuを5at~20at%含有し、Zrを5at~15at%含有し、残部がAlからなり、ターゲット組織中に、Te相、Cu相及びCuTe相が存在しないことを特徴とするAl-Te-Cu-Zr合金スパッタリングターゲット。
- ターゲット組織中に、Al相、CuAl相、TeZr相及びZr相が存在することを特徴とする請求項1記載のAl-Te-Cu-Zr合金スパッタリングターゲット。
- 平均粒径が10μm以下であることを特徴とする請求項1又は2記載のAl-Te-Cu-Zr合金スパッタリングターゲット。
- 純度が3N以上であり、酸素含有量が3000wtppm以下であることを特徴とする請求項1~3のいずれか一項に記載のAl-Te-Cu-Zr合金スパッタリングターゲット。
- Si、C、Ti、Hf、V、Nb、Ta、ランタノイド元素、Ge、Zn、Co、Ni、Fe、Mg、Ga、S、Seから選択されるいずれか一種以上に元素を含有することを特徴とする請求項1~4のいずれか一項に記載のAl-Te-Cu-Zr合金スパッタリングターゲット。
- 相対密度が90%以上であることを特徴とする請求項1~5のいずれか一項に記載のAl-Te-Cu-Zr合金スパッタリングターゲット。
- Cu原料とTe原料を溶解してCuTe合金インゴットを作製する工程、CuTe合金インゴットを粉砕した後、CuTe粉砕粉とZr原料粉をホットプレスしてCuTeZr合金を作製する工程、CuTeZr合金を粉砕した後、CuTeZr粉砕粉とAl原料粉をホットプレスしてCuTeZrAl合金を作製する工程、からなることを特徴とするAl-Te-Cu-Zr合金スパッタリングターゲットの製造方法
- CuTe粉砕粉とZr原料粉を300℃~400℃の温度でホットプレスして、CuTeZr合金を作製することを特徴とする請求項7記載のAl-Te-Cu-Zr合金スパッタリングターゲットの製造方法。
- CuTe粉砕粉とZr原料粉を400℃~600℃の温度でホットプレスして、CuTeZr合金を作製することを特徴とする請求項7記載のAl-Te-Cu-Zr合金スパッタリングターゲットの製造方法。
- CuTeZr合金を粉砕する工程において、不活性雰囲気又は真空状態で合金を粉砕することを特徴とする請求項7~9のいずれか一項に記載のAl-Te-Cu-Zr合金スパッタリングターゲットの製造方法。
- Cu原料とTe原料を溶解してCuTe合金インゴットを作製する工程、CuTe合金インゴットを粉砕した後、CuTe粉砕粉とZr原料粉とAl原料粉をホットプレスしてCuTeZrAl合金を作製する工程、からなることを特徴とするAl-Te-Cu-Zr合金スパッタリングターゲットの製造方法。
- CuTe粉砕粉とZr原料粉とAl原料粉を300℃~600℃の温度でホットプレスしてCuTeZrAl合金を作製することを特徴とする請求項11記載のAl-Te-Cu-Zr合金スパッタリングターゲットの製造方法。
- 平均粒径が0.1~10μmのCuTe粉砕粉、平均粒径が0.1~10μmのZr原料粉、平均粒径が0.1~10μmのAl原料粉を用いることを特徴とする請求項6~12のいずれか一項に記載のAl-Te-Cu-Zr合金スパッタリングターゲットの製造方法。
- CuTe粉砕粉を水素還元することを特徴とする請求項6~13のいずれか一項に記載のAl-Te-Cu-Zr合金スパッタリングターゲットの製造方法。
- CuTe合金を粉砕する工程において、不活性雰囲気又は真空状態で合金を粉砕することを特徴とする請求項6~14のいずれか一項に記載のAl-Te-Cu-Zr合金スパッタリングターゲットの製造方法。
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP15769207.0A EP3124647B1 (en) | 2014-03-28 | 2015-02-06 | Sputtering target comprising al-te-cu-zr alloy, and method for producing same |
| JP2016510100A JP6262332B2 (ja) | 2014-03-28 | 2015-02-06 | Al−Te−Cu−Zr合金からなるスパッタリングターゲット及びその製造方法 |
| KR1020167028078A KR20160131097A (ko) | 2014-03-28 | 2015-02-06 | Al-Te-Cu-Zr 합금으로 이루어지는 스퍼터링 타깃 및 그 제조 방법 |
| US15/129,464 US10519538B2 (en) | 2014-03-28 | 2015-02-06 | Sputtering target comprising Al—Te—Cu—Zr alloy, and method for producing same |
| SG11201607790WA SG11201607790WA (en) | 2014-03-28 | 2015-02-06 | SPUTTERING TARGET COMPRISING Al-Te-Cu-Zr ALLOY, AND METHOD FOR PRODUCING SAME |
| CN201580016432.4A CN106164329B (zh) | 2014-03-28 | 2015-02-06 | 包含Al-Te-Cu-Zr合金的溅射靶及其制造方法 |
| KR1020187020376A KR20180085057A (ko) | 2014-03-28 | 2015-02-06 | Al-Te-Cu-Zr 합금으로 이루어지는 스퍼터링 타깃 및 그 제조 방법 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014069142 | 2014-03-28 | ||
| JP2014-069142 | 2014-03-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2015146311A1 true WO2015146311A1 (ja) | 2015-10-01 |
Family
ID=54194850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2015/053326 Ceased WO2015146311A1 (ja) | 2014-03-28 | 2015-02-06 | Al-Te-Cu-Zr合金からなるスパッタリングターゲット及びその製造方法 |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US10519538B2 (ja) |
| EP (1) | EP3124647B1 (ja) |
| JP (1) | JP6262332B2 (ja) |
| KR (2) | KR20160131097A (ja) |
| CN (1) | CN106164329B (ja) |
| SG (1) | SG11201607790WA (ja) |
| TW (1) | TWI638053B (ja) |
| WO (1) | WO2015146311A1 (ja) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016056612A1 (ja) * | 2014-10-09 | 2016-04-14 | Jx金属株式会社 | Al-Te-Cu-Zr系合金からなるスパッタリングターゲット及びその製造方法 |
| JP2022054401A (ja) * | 2020-09-25 | 2022-04-06 | 光洋應用材料科技股▲分▼有限公司 | 鉄-白金系スパッタリングターゲット及びその製造方法 |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7423914B2 (ja) | 2019-06-14 | 2024-01-30 | ニプロ株式会社 | 皮膜付きガラスおよびその製造方法並びに改質されたガラス基材 |
| WO2021019992A1 (ja) * | 2019-07-31 | 2021-02-04 | 株式会社フルヤ金属 | スパッタリングターゲット |
| CN111118357B (zh) * | 2020-01-17 | 2021-06-08 | 四川大学 | 铝-铜-碲合金及其制备方法 |
| CN113403513B (zh) * | 2021-06-17 | 2022-02-25 | 山东吕美熔体技术有限公司 | 过共晶Al-Cu系合金及其制备方法 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010026924A1 (ja) * | 2008-09-02 | 2010-03-11 | ソニー株式会社 | 記憶素子および記憶装置 |
| JP2011026679A (ja) * | 2009-07-28 | 2011-02-10 | Sony Corp | ターゲット及びその製造方法、メモリ及びその製造方法 |
| JP2011124511A (ja) * | 2009-12-14 | 2011-06-23 | Sony Corp | 記憶素子および記憶装置 |
| JP2012142543A (ja) * | 2010-12-13 | 2012-07-26 | Sony Corp | 記憶素子およびその製造方法、並びに記憶装置 |
| WO2013035695A1 (ja) * | 2011-09-08 | 2013-03-14 | Jx日鉱日石金属株式会社 | Cu-Te合金系焼結体スパッタリングターゲット |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8430978B2 (en) * | 2003-08-05 | 2013-04-30 | Jx Nippon Mining & Metals Corporation | Sputtering target and method for production thereof |
| US8846141B1 (en) * | 2004-02-19 | 2014-09-30 | Aeris Capital Sustainable Ip Ltd. | High-throughput printing of semiconductor precursor layer from microflake particles |
| US20090065354A1 (en) * | 2007-09-12 | 2009-03-12 | Kardokus Janine K | Sputtering targets comprising a novel manufacturing design, methods of production and uses thereof |
-
2015
- 2015-02-06 SG SG11201607790WA patent/SG11201607790WA/en unknown
- 2015-02-06 CN CN201580016432.4A patent/CN106164329B/zh active Active
- 2015-02-06 WO PCT/JP2015/053326 patent/WO2015146311A1/ja not_active Ceased
- 2015-02-06 JP JP2016510100A patent/JP6262332B2/ja active Active
- 2015-02-06 KR KR1020167028078A patent/KR20160131097A/ko not_active Ceased
- 2015-02-06 KR KR1020187020376A patent/KR20180085057A/ko not_active Ceased
- 2015-02-06 EP EP15769207.0A patent/EP3124647B1/en active Active
- 2015-02-06 US US15/129,464 patent/US10519538B2/en active Active
- 2015-02-11 TW TW104104523A patent/TWI638053B/zh active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010026924A1 (ja) * | 2008-09-02 | 2010-03-11 | ソニー株式会社 | 記憶素子および記憶装置 |
| JP2011026679A (ja) * | 2009-07-28 | 2011-02-10 | Sony Corp | ターゲット及びその製造方法、メモリ及びその製造方法 |
| JP2011124511A (ja) * | 2009-12-14 | 2011-06-23 | Sony Corp | 記憶素子および記憶装置 |
| JP2012142543A (ja) * | 2010-12-13 | 2012-07-26 | Sony Corp | 記憶素子およびその製造方法、並びに記憶装置 |
| WO2013035695A1 (ja) * | 2011-09-08 | 2013-03-14 | Jx日鉱日石金属株式会社 | Cu-Te合金系焼結体スパッタリングターゲット |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP3124647A4 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016056612A1 (ja) * | 2014-10-09 | 2016-04-14 | Jx金属株式会社 | Al-Te-Cu-Zr系合金からなるスパッタリングターゲット及びその製造方法 |
| JP2022054401A (ja) * | 2020-09-25 | 2022-04-06 | 光洋應用材料科技股▲分▼有限公司 | 鉄-白金系スパッタリングターゲット及びその製造方法 |
| JP7288010B2 (ja) | 2020-09-25 | 2023-06-06 | 光洋應用材料科技股▲分▼有限公司 | 鉄-白金系スパッタリングターゲット及びその製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106164329B (zh) | 2018-09-14 |
| SG11201607790WA (en) | 2016-11-29 |
| TW201538740A (zh) | 2015-10-16 |
| KR20160131097A (ko) | 2016-11-15 |
| TWI638053B (zh) | 2018-10-11 |
| EP3124647B1 (en) | 2018-08-29 |
| CN106164329A (zh) | 2016-11-23 |
| US10519538B2 (en) | 2019-12-31 |
| KR20180085057A (ko) | 2018-07-25 |
| EP3124647A1 (en) | 2017-02-01 |
| EP3124647A4 (en) | 2017-11-01 |
| US20170175252A1 (en) | 2017-06-22 |
| JPWO2015146311A1 (ja) | 2017-04-13 |
| JP6262332B2 (ja) | 2018-01-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7972583B2 (en) | Iron silicide sputtering target and method for production thereof | |
| JP6262332B2 (ja) | Al−Te−Cu−Zr合金からなるスパッタリングターゲット及びその製造方法 | |
| JP2009074127A (ja) | 焼結スパッタリングターゲット材およびその製造方法 | |
| JP6312009B2 (ja) | Cr−Ti合金スパッタリングターゲット材およびその製造方法 | |
| TWI861157B (zh) | 濺鍍靶材 | |
| JP6768575B2 (ja) | タングステンシリサイドターゲット及びその製造方法 | |
| JP6282755B2 (ja) | Al−Te−Cu−Zr系合金からなるスパッタリングターゲット及びその製造方法 | |
| JP2021152203A (ja) | スパッタリングターゲット | |
| TWI848149B (zh) | 濺鍍靶材 | |
| JP7261694B2 (ja) | スパッタリングターゲット及び、スパッタリングターゲットの製造方法 | |
| JP2022044768A (ja) | スパッタリングターゲット | |
| JP6310088B2 (ja) | タングステンスパッタリングターゲット及びその製造方法 | |
| JP2021091944A (ja) | スパッタリングターゲット、及び、スパッタリングターゲットの製造方法 | |
| JP2021107572A (ja) | スパッタリングターゲット | |
| JP2021107573A (ja) | スパッタリングターゲット | |
| JP2021123782A (ja) | スパッタリングターゲット、磁性膜、及びスパッタリングターゲット作製用の原料混合粉末 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 15769207 Country of ref document: EP Kind code of ref document: A1 |
|
| ENP | Entry into the national phase |
Ref document number: 2016510100 Country of ref document: JP Kind code of ref document: A |
|
| REEP | Request for entry into the european phase |
Ref document number: 2015769207 Country of ref document: EP |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2015769207 Country of ref document: EP |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 15129464 Country of ref document: US |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| ENP | Entry into the national phase |
Ref document number: 20167028078 Country of ref document: KR Kind code of ref document: A |