US20070053786A1 - Phase change film for semiconductor nonvolatile memory and sputtering target for forming phase change film - Google Patents
Phase change film for semiconductor nonvolatile memory and sputtering target for forming phase change film Download PDFInfo
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- US20070053786A1 US20070053786A1 US10/572,216 US57221604A US2007053786A1 US 20070053786 A1 US20070053786 A1 US 20070053786A1 US 57221604 A US57221604 A US 57221604A US 2007053786 A1 US2007053786 A1 US 2007053786A1
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- phase change
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- change film
- nonvolatile memory
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- 230000008859 change Effects 0.000 title claims abstract description 64
- 239000004065 semiconductor Substances 0.000 title claims abstract description 28
- 238000005477 sputtering target Methods 0.000 title claims abstract description 15
- 239000000203 mixture Substances 0.000 claims abstract description 29
- 229910052747 lanthanoid Inorganic materials 0.000 claims abstract description 17
- 150000002602 lanthanoids Chemical class 0.000 claims abstract description 17
- 239000012535 impurity Substances 0.000 claims abstract description 14
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 11
- 229910052796 boron Inorganic materials 0.000 claims abstract description 11
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 11
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 10
- 238000002844 melting Methods 0.000 claims description 20
- 230000008018 melting Effects 0.000 claims description 20
- 238000002425 crystallisation Methods 0.000 claims description 19
- 230000008025 crystallization Effects 0.000 claims description 19
- 229910052688 Gadolinium Inorganic materials 0.000 claims description 9
- 229910052779 Neodymium Inorganic materials 0.000 claims description 9
- 229910052772 Samarium Inorganic materials 0.000 claims description 9
- 229910052771 Terbium Inorganic materials 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 229910052692 Dysprosium Inorganic materials 0.000 claims description 8
- 239000000523 sample Substances 0.000 claims description 7
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- 238000004544 sputter deposition Methods 0.000 description 6
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- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000012782 phase change material Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000004455 differential thermal analysis Methods 0.000 description 2
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- 230000002093 peripheral effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910001215 Te alloy Inorganic materials 0.000 description 1
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- 229910052681 coesite Inorganic materials 0.000 description 1
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- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 238000009616 inductively coupled plasma Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000001755 magnetron sputter deposition Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
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- 229910052714 tellurium Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
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Classifications
-
- 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
- H10N70/231—Multistable switching devices, e.g. memristors based on solid-state phase change, e.g. between amorphous and crystalline phases, Ovshinsky effect
-
- 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
-
- 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
-
- 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
- H10N70/801—Constructional details of multistable switching devices
- H10N70/881—Switching materials
- H10N70/882—Compounds of sulfur, selenium or tellurium, e.g. chalcogenides
- H10N70/8825—Selenides, e.g. GeSe
-
- 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
Definitions
- the present invention relates to a phase change film for a semiconductor nonvolatile memory and a sputtering target for forming the phase change film.
- Phase change films for semiconductor nonvolatile memory has been used as recording layers.
- a phase change material in a crystalline state is used for the recording layers.
- rewrite is performed by rapidly heating and melting a portion of the phase change material with a heater, and then rapidly cooling the portion to make it partially amorphous, or otherwise slowly heating an amorphous portion at the temperature over its crystallization temperature and under its melting point, to bring it back to a crystalline state.
- readout is performed due to difference between the electrical resistances of the phase change material in a crystalline state and a partially amorphous state.
- phase change films there is known a phase change film having a composition containing 10 to 25% of Ge and 10 to 25% of Sb, with the balance being Te and inevitable impurities.
- phase change film formed by performing sputtering using a target with almost the same component composition as the above phase-change recording layer For example, see JP-W No. 2001-502848, JP-W No. 2002-512439, JP-W No. 2002-540605 “OYO BUTURI” (A monthly publication of The Japan Society of Applied Physics, Vol. 71, No. 12, 2002, p. 1513 to 1517
- Non-Patent Document 2 “Nikkei Micro-devices”, March issue in 2003, p.104
- the presence of B, Al, C, Si or a lanthanoid element is 10% or less of the film, the electric resistivity rises, and thus the amount of current needed for melting is further reduced. Accordingly, the power consumption can be reduced.
- Dy is particularly effective.
- the present invention is achieved based on these research results, and is characterized by:
- the present invention is characterized by the phase change film for a semiconductor nonvolatile memory as described above in which the lanthanoid elements are at least one or more elements selected from a group consisting of Dy, Tb, Nd, Sm, and Gd.
- the electric resistivity of the film measured by the four-point probe method after crystallization is 5 ⁇ 10 ⁇ 3 to 5 ⁇ 10 ⁇ cm, and the melting point of the film is 600° C. or less.
- the present invention is characterized by a phase change film for a semiconductor nonvolatile memory described above, wherein the electric resistivity of the film measured by the four-point probe method after crystallization is 5 ⁇ 10 ⁇ 3 to 5 ⁇ 10 ⁇ cm, and the melting point of the film is 600° C. or less.
- the phase change film formed using the sputtering targets of the present invention enables a low melting point to be obtained without remarkably lowering resistance so much, and can reduce a current value at the time of writing operation, contribute to the reduction in power consumption and a miniaturization of devices, and make a great contribution to the development of a new semiconductor memory industry.
- Ga component When Ga component is contained in a phase change film with a composition containing 10 to 25% of Ge and 10 to 25% of Sb, with the balance being Te and inevitable impurities, Ga component has a function to further lower the melting point of the phase change film. However, if less than 1% of Ga is contained, the effect of lowering the melting point is little, which is not preferable. On the other hand, if Ga is contained over 10%, the crystallization temperature rises excessively, which is not preferable. A proper rise in the crystallization temperature improves the stability of an amorphous state which leads to improvement of the retention characteristics. However, if the crystallization temperature rises excessively, the electric power required for crystallization increases, which is not preferable from the viewpoint of a reducing power consumption. Accordingly, the amount of Ga to be contained in the phase change film is set to be 1 to 10% (more preferably, 2 to 8%).
- the phase change film with a composition containing 10 to 25% of Ge and 10 to 25% of Sb, with the balance being Te and inevitable impurities has mainly two types of crystal structures, i.e., a face-centered cubic crystal structure having a high resistance and a hexagonal crystal structure having a low resistance.
- the face-centered cubic crystal structure is created when the film is crystallized at a relatively low temperature
- the hexagonal crystal structure is created when the film is kept at a relatively high temperature. Since the phase change rate from an amorphous state to a face-centered cubic crystal state is rapid, the crystal which is created when the film is phase-changed and crystallized from an amorphous state is generally face-centered cubic crystal.
- Ga is added to the conventionally known composition of Ge—Sb—Te, the face-centered cubic crystal structure is stabilized up to a high temperature as compared with the case of not adding Ga. Therefore, Ga also has an effect of improving the temperature stability of the electric resistivity.
- B, Al, C, Si, and lanthanoid elements have a function to further raise a resistance value in a crystalline state of the phase change film by the addition of Ga, they are added, if necessary. However, if these components are contained over 10%, the rise in the crystallization temperature of the phase change film increases excessively, which is not preferable. A proper rise in the crystallization temperature improves the stability of an amorphous state which leads to improvement of the retention characteristics. However, if the crystallization temperature rises excessively, the electric power required for crystallization increases, which is not preferable from the viewpoint of reducing power consumption. Accordingly, the content of these components are set to be 10% or less. The range of the content is more preferably 0.5 to 8%. In addition, among the lanthanoid elements, Dy, Tb, Nd, Sm, and Gd are particularly preferable.
- Ge and Sb contained in the phase change film having a high electrical resistance according to the present invention is preferably 10 to 25% of Ge and 10 to 25% of Sb.
- the reason is based on the fact that, if Ge is less than 10% and Sb is less than 10% and if Ge is over 25% and Sb is over 25%, the resistance value becomes low and the crystallization time becomes long, which are not preferable.
- the phase change film according to the present invention requires the electric resistivity value measured by the four-point probe method after crystallization to be 5 ⁇ 10 ⁇ 3 ⁇ cm or more (more preferably, 8 ⁇ 10 ⁇ 2 ⁇ cm or more).
- the reason comes from the fact that, if the electric resistivity value is less than 5 ⁇ 10 ⁇ 3 ⁇ cm, a large current flows through a circuit, which therefore increases the power consumption and becomes an obstacle in reducing the size of the circuit, which are not preferable.
- the electric resistivity of a Ge—Sb—Te alloy in an amorphous state is generally about 1 ⁇ 10 2 ⁇ cm.
- this alloy has a difference of about at least one and a half digits between the resistivities of the alloy in a crystalline state and an amorphous state for stable read-out. Therefore, the resistivity value of the phase change film in a crystalline state is required to be 5 ⁇ 10 ⁇ cm or less. Accordingly, the electric resistivity measured by the four-point probe method after the crystallization of the phase change film according to the present invention is set to be 5 ⁇ 10 ⁇ 3 ⁇ cm to 5 ⁇ 10 ⁇ cm. Moreover, the melting point of the phase change film according to the present invention is required to be 600° C. from the viewpoint of low power consumption.
- a sputtering target for forming a phase change film for a semiconductor nonvolatile memory with the composition, as described above according to the present invention can have a component composition containing 10 to 26 atomic % of Ge, 10 to 26 atomic % of Sb, and 1 to 11 atomic % of Ga, with the balance being Te and inevitable impurities.
- a sputtering target for forming a phase change film for a semiconductor nonvolatile memory with the composition can have a composition 10 to 26 atomic % of Ge, 10 to 26 atomic % of Sb, 1 to 11 atomic % of Ga, and a total of 11 atomic % or less of at least one or more elements selected from a group consisting of B, Al, C, Si and lanthanoid elements, with the balance being Te and inevitable impurities.
- the present invention includes includes a sputtering target for forming a phase change film for a semiconductor nonvolatile memory with a composition containing 10 to 26 atomic % of Ge, 10 to 26 atomic % of Sb, and 1 to 11 atomic % of Ga, with the balance being Te and inevitable impurities.
- Another sputtering target for forming a phase change film for a semiconductor nonvolatile memory can include a composition 10 to 26 atomic % of Ge, 10 to 26 atomic % of Sb, 1 to 11 atomic % of Ga, and a total of 11 atomic % or less of at least one or more elements selected from a group consisting of B, Al, C, Si and lanthanoid elements, with the balance being Te and inevitable impurities, and a further sputtering target for forming a phase change film for a semiconductor nonvolatile memory as described above in which the lanthanoid elements are at least one or more elements selected from a group consisting of Dy, Tb, Nd, Sm, and Gd.
- the sputtering target for forming a phase change film for a semiconductor nonvolatile memory having the component composition, as described above according to the present invention is manufactured by melting a Ge—Sb—Te based alloy with a predetermined component composition in an Ar gas atmosphere, then adding Ga to the molten metal, pouring the molten metal into molds made of iron to manufacture an alloy ingot, pulverizing the alloy ingot in an inert gas atmosphere to manufacture an alloy powder having a particle size of 200 ⁇ m or less, and finally hot pressing the alloy powder in a vacuum.
- the vacuum hot pressing is performed by keeping the alloy powder under the following conditions: a pressure of 146 to 155 MPa, a temperature of 370 to 430° C., and a duration of 1 to 2 hours, and thereafter cooling the molds to a normal temperature at a cooling rate of 1 to 3° C./min when the temperature of the molds has dropped to 270 to 300° C.
- the sputtering target for forming a phase change film for a semiconductor nonvolatile memory having the component composition, as described above according to the present invention is manufactured by adding Ga to a Ge—Sb—Te based alloy, mixing this alloy powder with one or more of the separately manufactured powders of B, Al, C, Si, and lanthanoid elements (preferably, Dy, Tb, Nd, Sm, and Gd) each having a particle size of 200 ⁇ m or less so as to have component compositions according to the present invention, and hot-pressing the alloy powder in a vacuum.
- lanthanoid elements preferably, Dy, Tb, Nd, Sm, and Gd
- the vacuum hot pressing is performed by keeping the alloy powder under the following conditions: a pressure of 146 to 155 MPa, a temperature of 370 to 430° C., and a duration of 1 to 2 hours, and thereafter cooling the molds to a normal temperature at a cooling rate of 1 to 3° C./min when the temperature of the molds has dropped to 270 to 300° C.
- Ge, Sb, and Te were melted in an Ar gas atmosphere.
- Ga was added to the obtained molten metal.
- An alloy ingot was manufactured by casting the molten metal obtained by adding Ga.
- An alloy powder having a particle size of 100 ⁇ m or less was manufactured by reducing the alloy ingot to powder in an Ar atmosphere.
- Mixed powders were manufactured by mixing the alloy powder with the respective elemental powders of B, Al, C, Si, Dy, Tb, Nd, Sm, and Gd.
- Hot pressed bodies were manufactured by hot-pressing the alloy power and the respective mixed powders in a vacuum at a temperature of 400° C. and at a pressure of 146 MPa.
- Targets 1 to 21 according to the present invention, comparative targets 1 to 10, and conventional target 1 having the following dimensions: a diameter of 125 mm and a thickness of 5 mm, a disk shape, and component compositions as shown in Table 1 were manufactured by performing grinding processing on the hot pressed bodies under the condition of a lathe revolution speed of 200 rpm, using a carbide turning tool.
- each of the targets 1 to 21 according to the present invention, comparative targets 1 to 10, and conventional target 1 is bonded to a cooling backing plate made of copper, with an indium solder material having a purity of 99.999% by weight.
- the resulting targets are loaded into a direct-current magnetron sputtering apparatus within which the distance between the targets and substrates (Si wafers on the surface of each of which an SiO 2 film having a thickness of 100 nm is formed) is set to be 70 mm. Thereafter, the sputtering apparatus is vacuumed until the degree of an ultimate vacuum thereof becomes 5 ⁇ 10 ⁇ 5 Pa or less. Thereafter, the sputtering apparatus is supplied with Ar gas until the total pressure thereof become 1.0 Pa.
- Substrate temperature room temperature
- Input power 50 W (0.4 W/cm 2 )
- phase change films 1 to 21 were sputtering under the above conditions, thereby forming phase change films 1 to 21, comparative phase change films 1 to 10, and conventional phase change film 1, which have a thickness of 300 nm and have component compositions as shown Tables 4 to 6 on the surfaces of the substrates.
- phase change films 1 to 21 The component compositions of the phase change films 1 to 21, comparative phase change films 1 to 10, and conventional phase change film 1, which were obtained in this way, were measured by an inductively coupled plasma (ICP) method. The results thereof are shown in Table 2.2 Moreover, the phase change films 1 to 21 according to the present invention, conventional phase change films, and conventional phase change film 1, which were obtained, were kept and crystallized in a nitrogen flow at a temperature of 230° C. for five minutes. Thereafter, electric resistivities were measured by a four-point probe method. Further, a film having a thickness of 3 ⁇ m was formed on a polycarbonate substrate having a diameter of 120 mm under the conditions described above. All of the formed film was peeled off and powderized.
- ICP inductively coupled plasma
- the crystallization temperatures and melting points of the powdered materials were measured under the following conditions: an Ar flow rate of 200 ml/min and a rising temperature of 10° C./min, by a differential thermal analysis (DTA) method. The results thereof are shown in Table 2.2 In addition, the masses of samples used in this measurement are standardized as 15 mg. It should be noted herein that an exothermic peak appearing in the vicinity of 160 to 340° C. is used as the crystallization temperature and an endothermic peak appearing in the vicinity of 540 to 620° C. is used as the melting point.
- DTA differential thermal analysis
- the crystallized phase change films 1 to 21 according to the present invention which were obtained by performing sputtering using the targets 1 to 21 according to the present invention, are excellent phase change films having lower melting points and having little drop in electric resistivities, as compared with the conventional phase change film 1, which was obtained by performing sputtering using the conventional target 1.
- at least one unfavorable characteristic appears in the comparative phase change films 1 to 10 containing additive components out of the range of this invention.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Physical Vapour Deposition (AREA)
- Semiconductor Memories (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-324063 | 2003-09-17 | ||
JP2003324063 | 2003-09-17 | ||
JP2004102724A JP4766441B2 (ja) | 2003-09-17 | 2004-03-31 | 半導体不揮発メモリー用相変化膜およびこの相変化膜を形成するためのスパッタリングターゲット |
JP2004-102724 | 2004-03-31 | ||
PCT/JP2004/013036 WO2005029585A1 (ja) | 2003-09-17 | 2004-09-08 | 半導体不揮発メモリー用相変化膜およびこの相変化膜を形成するためのスパッタリングターゲット |
Publications (1)
Publication Number | Publication Date |
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US20070053786A1 true US20070053786A1 (en) | 2007-03-08 |
Family
ID=34380303
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/572,216 Abandoned US20070053786A1 (en) | 2003-09-17 | 2004-09-08 | Phase change film for semiconductor nonvolatile memory and sputtering target for forming phase change film |
Country Status (7)
Country | Link |
---|---|
US (1) | US20070053786A1 (ja) |
EP (1) | EP1667230A4 (ja) |
JP (1) | JP4766441B2 (ja) |
KR (1) | KR20060073961A (ja) |
SG (2) | SG146642A1 (ja) |
TW (1) | TW200527654A (ja) |
WO (1) | WO2005029585A1 (ja) |
Cited By (12)
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US20070181867A1 (en) * | 2005-12-20 | 2007-08-09 | Hewak Daniel W | Phase change memory materials, devices and methods |
US20080108174A1 (en) * | 2006-11-07 | 2008-05-08 | Samsung Electronics Co., Ltd. | Metal precursors for low temperature deposition and methods of forming a metal thin layer and manufacturing a phase-change memory device using the metal precursors |
US20100003446A1 (en) * | 2007-01-30 | 2010-01-07 | Yoshitaka Hayashi | Optical recording medium, and sputtering target and method for producing the same |
US20100032290A1 (en) * | 2007-01-25 | 2010-02-11 | Ulvac, Inc. | Method for forming chalcogenide film and method for manufacturing recording element |
US20100072451A1 (en) * | 2006-07-21 | 2010-03-25 | Motoyasu Terao | Semiconductor device |
US20100108499A1 (en) * | 2005-07-11 | 2010-05-06 | Mitsubishi Materials Corporation | Sputtering target for forming phase-change film and method for manufacturing the same |
US20120217157A1 (en) * | 2009-11-06 | 2012-08-30 | Mitsubishi Materials Corporation | Sputtering target and method for producing the same |
US20140151624A1 (en) * | 2009-07-28 | 2014-06-05 | Sony Corporation | Target, method for producing the same, memory, and method for producing the same |
US20150048291A1 (en) * | 2013-08-16 | 2015-02-19 | Macronix International Company, Ltd. | Phase change memory cell with improved phase change material |
CN104655711A (zh) * | 2013-11-18 | 2015-05-27 | 中国电子科技集团公司第十八研究所 | 高压氢镍蓄电池漏率定量测试方法 |
TWI489622B (zh) * | 2007-08-06 | 2015-06-21 | Sony Corp | Memory elements and memory devices |
CN106257700A (zh) * | 2015-06-19 | 2016-12-28 | 旺宏电子股份有限公司 | 相变化存储器材料、相变化存储器装置及其制造方法 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007057972A1 (ja) * | 2005-11-21 | 2007-05-24 | Renesas Technology Corp. | 半導体装置 |
KR100829601B1 (ko) * | 2006-09-27 | 2008-05-14 | 삼성전자주식회사 | 칼코겐 화합물 타겟, 이의 제조 방법 및 상변화 메모리장치의 제조 방법 |
WO2020105676A1 (ja) * | 2018-11-20 | 2020-05-28 | 三菱マテリアル株式会社 | スパッタリングターゲット |
JP2020132996A (ja) | 2019-02-20 | 2020-08-31 | 三菱マテリアル株式会社 | スパッタリングターゲット |
Citations (2)
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- 2004-03-31 JP JP2004102724A patent/JP4766441B2/ja not_active Expired - Fee Related
- 2004-09-08 EP EP04787719A patent/EP1667230A4/en not_active Withdrawn
- 2004-09-08 US US10/572,216 patent/US20070053786A1/en not_active Abandoned
- 2004-09-08 KR KR1020067005466A patent/KR20060073961A/ko not_active Application Discontinuation
- 2004-09-08 SG SG200806863-7A patent/SG146642A1/en unknown
- 2004-09-08 WO PCT/JP2004/013036 patent/WO2005029585A1/ja active Application Filing
- 2004-09-08 SG SG200806862-9A patent/SG146641A1/en unknown
- 2004-09-09 TW TW093127305A patent/TW200527654A/zh unknown
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Cited By (21)
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US20100108499A1 (en) * | 2005-07-11 | 2010-05-06 | Mitsubishi Materials Corporation | Sputtering target for forming phase-change film and method for manufacturing the same |
US8624215B2 (en) | 2005-12-20 | 2014-01-07 | University Of Southampton | Phase change memory devices and methods comprising gallium, lanthanide and chalcogenide compounds |
US9029823B2 (en) | 2005-12-20 | 2015-05-12 | University Of South Hampton | Phase change memory devices and methods comprising gallium, lanthanide and chalcogenide compounds |
US20070181867A1 (en) * | 2005-12-20 | 2007-08-09 | Hewak Daniel W | Phase change memory materials, devices and methods |
US8319204B2 (en) * | 2006-07-21 | 2012-11-27 | Renesas Electronics Corporation | Semiconductor device |
US20100072451A1 (en) * | 2006-07-21 | 2010-03-25 | Motoyasu Terao | Semiconductor device |
US7867880B2 (en) | 2006-11-07 | 2011-01-11 | Samsung Electronics Co., Ltd. | Metal precursors for low temperature deposition and methods of forming a metal thin layer and manufacturing a phase-change memory device using the metal precursors |
US20080108174A1 (en) * | 2006-11-07 | 2008-05-08 | Samsung Electronics Co., Ltd. | Metal precursors for low temperature deposition and methods of forming a metal thin layer and manufacturing a phase-change memory device using the metal precursors |
US20100032290A1 (en) * | 2007-01-25 | 2010-02-11 | Ulvac, Inc. | Method for forming chalcogenide film and method for manufacturing recording element |
US20100003446A1 (en) * | 2007-01-30 | 2010-01-07 | Yoshitaka Hayashi | Optical recording medium, and sputtering target and method for producing the same |
US8227067B2 (en) | 2007-01-30 | 2012-07-24 | Ricoh Company, Ltd. | Optical recording medium, and sputtering target and method for producing the same |
TWI489622B (zh) * | 2007-08-06 | 2015-06-21 | Sony Corp | Memory elements and memory devices |
US9419214B2 (en) * | 2009-07-28 | 2016-08-16 | Sony Corporation | Target, method for producing the same, memory, and method for producing the same |
US10069066B2 (en) | 2009-07-28 | 2018-09-04 | Sony Semiconductor Solutions Corporation | Target, method for producing the same, memory, and method for producing the same |
US20140151624A1 (en) * | 2009-07-28 | 2014-06-05 | Sony Corporation | Target, method for producing the same, memory, and method for producing the same |
US8795489B2 (en) * | 2009-11-06 | 2014-08-05 | Mitsubishi Materials Corporation | Sputtering target and method for producing the same |
US20120217157A1 (en) * | 2009-11-06 | 2012-08-30 | Mitsubishi Materials Corporation | Sputtering target and method for producing the same |
US20150048291A1 (en) * | 2013-08-16 | 2015-02-19 | Macronix International Company, Ltd. | Phase change memory cell with improved phase change material |
US9257643B2 (en) * | 2013-08-16 | 2016-02-09 | International Business Machines Corporation | Phase change memory cell with improved phase change material |
CN104655711A (zh) * | 2013-11-18 | 2015-05-27 | 中国电子科技集团公司第十八研究所 | 高压氢镍蓄电池漏率定量测试方法 |
CN106257700A (zh) * | 2015-06-19 | 2016-12-28 | 旺宏电子股份有限公司 | 相变化存储器材料、相变化存储器装置及其制造方法 |
Also Published As
Publication number | Publication date |
---|---|
JP2005117002A (ja) | 2005-04-28 |
EP1667230A4 (en) | 2007-12-12 |
TW200527654A (en) | 2005-08-16 |
KR20060073961A (ko) | 2006-06-29 |
EP1667230A1 (en) | 2006-06-07 |
SG146642A1 (en) | 2008-10-30 |
SG146641A1 (en) | 2008-10-30 |
JP4766441B2 (ja) | 2011-09-07 |
WO2005029585A1 (ja) | 2005-03-31 |
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