WO2006092846A1 - 半導体装置及びその製造方法 - Google Patents
半導体装置及びその製造方法 Download PDFInfo
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- WO2006092846A1 WO2006092846A1 PCT/JP2005/003382 JP2005003382W WO2006092846A1 WO 2006092846 A1 WO2006092846 A1 WO 2006092846A1 JP 2005003382 W JP2005003382 W JP 2005003382W WO 2006092846 A1 WO2006092846 A1 WO 2006092846A1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76801—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
- H01L21/76829—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing characterised by the formation of thin functional dielectric layers, e.g. dielectric etch-stop, barrier, capping or liner layers
- H01L21/76834—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing characterised by the formation of thin functional dielectric layers, e.g. dielectric etch-stop, barrier, capping or liner layers formation of thin insulating films on the sidewalls or on top of conductors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L28/00—Passive two-terminal components without a potential-jump or surface barrier for integrated circuits; Details thereof; Multistep manufacturing processes therefor
- H01L28/40—Capacitors
- H01L28/55—Capacitors with a dielectric comprising a perovskite structure material
- H01L28/57—Capacitors with a dielectric comprising a perovskite structure material comprising a barrier layer to prevent diffusion of hydrogen or oxygen
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B53/00—Ferroelectric RAM [FeRAM] devices comprising ferroelectric memory capacitors
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B53/00—Ferroelectric RAM [FeRAM] devices comprising ferroelectric memory capacitors
- H10B53/30—Ferroelectric RAM [FeRAM] devices comprising ferroelectric memory capacitors characterised by the memory core region
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L28/00—Passive two-terminal components without a potential-jump or surface barrier for integrated circuits; Details thereof; Multistep manufacturing processes therefor
- H01L28/40—Capacitors
- H01L28/60—Electrodes
- H01L28/65—Electrodes comprising a noble metal or a noble metal oxide, e.g. platinum (Pt), ruthenium (Ru), ruthenium dioxide (RuO2), iridium (Ir), iridium dioxide (IrO2)
Definitions
- the present invention relates to a semiconductor device suitable for a nonvolatile memory having a ferroelectric capacitor and a method for manufacturing the same.
- ferroelectric memory As a dielectric film of a capacitor.
- a ferroelectric capacitor Such a capacitor is called a ferroelectric capacitor, and a ferroelectric dielectric memory (FeRAM: Ferroelectric Random Access Memory) having a ferroelectric capacitor is a nonvolatile memory.
- FeRAM Ferroelectric Random Access Memory
- Ferroelectric memory has advantages such as being capable of high-speed operation, low power consumption, and excellent writing Z-reading durability, and further development is expected in the future.
- the ferroelectric capacitor has a tendency to easily deteriorate its characteristics due to external hydrogen gas and moisture.
- a ferroelectric film composed of an O film (PZT film) and an upper electrode composed of a Pt film are sequentially stacked.
- the ferroelectric properties of the PZT film will be almost lost. It is known.
- the heat treatment is performed with the ferroelectric capacitor adsorbing moisture or in the vicinity of the ferroelectric capacitor, the ferroelectricity of the ferroelectric film of the ferroelectric capacitor is significantly deteriorated. It is also known to end up.
- a film forming process by the Deposition method or the like is selected. Furthermore, as a technique for preventing the deterioration of the ferroelectric film due to hydrogen and moisture, a technique for forming an aluminum oxide film so as to cover the ferroelectric capacitor and formed on the ferroelectric capacitor. On interlayer insulation film, techniques for forming an aluminum oxide film have been proposed. This is because the acid aluminum film has a function of preventing diffusion of hydrogen and moisture. Therefore, according to these techniques, it is possible to prevent hydrogen and moisture from reaching the ferroelectric film and to prevent deterioration of the ferroelectric film due to hydrogen and moisture.
- an A1 wiring is formed, and an oxide film is further formed as an interlayer insulating film by a plasma CVD method or the like. Even when this oxide film is formed, the ferroelectric capacitor may be deteriorated. Therefore, before forming the interlayer insulating film, an aluminum oxide film covering the A1 wiring is formed.
- the aluminum oxide film In order to ensure the electrical connection between the upper layer wiring and the A1 wiring, it is necessary to etch the aluminum oxide film to form a via hole. This process is difficult. For this reason, the diameter of the via hole may be smaller than the design value, or the state of the tungsten plug to be formed as a via plug may become abnormal due to the influence of the etched deposit, resulting in contact failure. As a result, the design margin becomes narrow and it becomes difficult to obtain stable characteristics, which leads to a decrease in yield.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2003-197878
- Patent Document 2 JP 2001-68639 A
- Patent Document 3 Japanese Patent Laid-Open No. 2003-174145
- Patent Document 4 Japanese Patent Laid-Open No. 2002-176149
- Patent Document 5 Japanese Patent Laid-Open No. 2003-100994
- Patent Document 6 Japanese Patent Laid-Open No. 60-262443
- Patent Document 7 Japanese Unexamined Patent Publication No. 63-117429
- Patent Document 8 JP-A-10-256254
- An object of the present invention is to provide a semiconductor device capable of obtaining stable characteristics while preventing damage to a ferroelectric capacitor and a method for manufacturing the same.
- the inventor of the present application has made extensive studies in order to solve the above problems, and as a result, the oxide covering the A1 wiring Rather than functioning as a film that prevents hydrogen and moisture from entering, the aluminum film functions as a film that suppresses plasma damage to the ferroelectric capacitor during the formation of the plasma oxide film. I found out. Therefore, even if the film covering the A1 wiring is another insulating film that does not need to be a film that prevents intrusion of hydrogen and water, it can obtain at least the same characteristics as before if plasma damage can be suppressed. Can do. Furthermore, if the film is easier to process than the aluminum oxide film, stable characteristics can be obtained. Based on such a view, the present inventor has conceived various aspects of the invention shown below.
- the semiconductor device according to the present invention is directly connected to a semiconductor substrate, a ferroelectric capacitor formed above the semiconductor substrate and provided with a ferroelectric film, and an electrode of the ferroelectric capacitor. Wiring and an insulating film covering the wiring are provided.
- the insulating film has a degree of damage to the ferroelectric capacitor less than that of the acid-aluminum film at the time of film formation, and is easy to process. It is a higher film.
- a wiring directly connected to the electrode of the ferroelectric capacitor is formed. To do. Then, an insulating film that covers the wiring is formed.
- the degree of damage to the ferroelectric capacitor at the time of film formation is less than that of the acid aluminum film, and the ease of processing is higher than that of the acid aluminum film. Form a high film.
- FIG. 1 is a circuit diagram showing a configuration of a memory cell array of a ferroelectric memory (semiconductor device) manufactured by a method according to an embodiment of the present invention.
- FIG. 2A is a cross-sectional view showing a method for manufacturing a ferroelectric memory according to an embodiment of the present invention.
- FIG. 2B is a cross-sectional view showing the method for manufacturing the ferroelectric memory according to the embodiment of the present invention, following FIG. 2A.
- FIG. 2C is a cross-sectional view of FIG. It is sectional drawing which shows a method.
- FIG. 2D is a cross-sectional view showing the method for manufacturing the ferroelectric memory according to the embodiment of the present invention, following FIG. 2C.
- FIG. 2E is a cross-sectional view showing the method for manufacturing the ferroelectric memory according to the embodiment of the present invention, following FIG. 2D.
- FIG. 2F is a cross-sectional view showing the method for manufacturing the ferroelectric memory according to the embodiment of the present invention, following FIG. 2E.
- FIG. 2G is a cross-sectional view showing the method for manufacturing the ferroelectric memory according to the embodiment of the present invention, following FIG. 2F.
- FIG. 2H is a cross-sectional view showing the method for manufacturing the ferroelectric memory according to the embodiment of the present invention, following FIG. 2G.
- FIG. 21 is a cross-sectional view showing a method for manufacturing the ferroelectric memory according to the embodiment of the present invention, following FIG. 2H.
- FIG. 2J is a cross-sectional view showing a method for manufacturing the ferroelectric memory according to the embodiment of the present invention, following FIG. 21.
- FIG. 2K is a cross-sectional view showing a method for manufacturing the ferroelectric memory according to the embodiment of the present invention, following FIG. 2J.
- FIG. 2L is a cross-sectional view showing the method for manufacturing the ferroelectric memory according to the embodiment of the present invention, following FIG. 2K.
- FIG. 2M is a cross-sectional view showing the method for manufacturing the ferroelectric memory according to the embodiment of the present invention, following FIG. 2L.
- FIG. 3 is a cross-sectional view showing another embodiment of a ferroelectric memory.
- FIG. 1 is a circuit diagram showing a configuration of a memory cell array of a ferroelectric memory (semiconductor device) manufactured by a method according to an embodiment of the present invention.
- the memory cell array includes a plurality of bit lines 103 extending in one direction, a plurality of word lines 104 extending in a direction perpendicular to the direction in which the bit lines 103 extend, and a pre-line.
- a line 105 is provided.
- a plurality of memory cells of the ferroelectric memory according to the present embodiment are arranged in an array so as to match the lattice formed by the bit line 103, the word line 104, and the plate line 105.
- Each memory cell is provided with a ferroelectric capacitor (storage unit) 101 and a MOS transistor (switching unit) 102.
- the gate of the MOS transistor 102 is connected to the word line 104.
- One source and drain of the MOS transistor 102 is connected to the bit line 103, and the other source and drain is connected to one electrode of the ferroelectric capacitor 101.
- the other electrode of the ferroelectric capacitor 101 is connected to the plate line 105.
- Each word line 104 and plate line 105 are shared by a plurality of MOS transistors 102 arranged in the same direction as the direction in which they extend.
- each bit line 103 is shared by a plurality of MOS transistors 102 arranged in the same direction as the extending direction thereof.
- the direction in which the word line 104 and the plate line 105 extend and the direction in which the bit line 103 extends may be referred to as a row direction and a column direction, respectively.
- the arrangement of the bit line 103, the word line 104, and the plate line 105 is not limited to the above.
- data is stored according to the polarization state of the ferroelectric film provided in the ferroelectric capacitor 101.
- FIGS. 2A to 2M are cross-sectional views showing a method of manufacturing a ferroelectric memory (semiconductor device) according to an embodiment of the present invention in the order of steps.
- an element isolation insulating film 2 that partitions an element active region is formed on a surface of a semiconductor substrate 1 such as an Si substrate, for example, LOCOS (Local Oxidation). of Silicon) method.
- a semiconductor substrate 1 such as an Si substrate, for example, LOCOS (Local Oxidation). of Silicon) method.
- MOSFET Metal Oxidation
- This transistor corresponds to the MOS transistor 102 in FIG.
- the gate insulating film 3 for example, a SiO film having a thickness of about lOOnm is formed by thermal oxidation.
- a silicon oxide film 8a is formed on the entire surface.
- the silicon oxynitride film 7 is formed in order to prevent hydrogen degradation of the gate insulating film 3 and the like when the silicon oxide film 8a is formed.
- a TEOS (tetraethylorthosilicate) film having a thickness of about 700 nm is formed by a CVD method.
- Al 2 O film 8b having a thickness of about 20 nm is formed on the silicon oxide film 8a as a lower electrode adhesion layer, for example, by sputtering.
- a lower electrode film 9 is formed on 2 3 2 3.
- a Pt film having a thickness of about 150 nm is formed by sputtering.
- a ferroelectric film 10 is formed on the lower electrode film 9 in an amorphous state.
- the ferroelectric film 10 for example, a PLZT ((Pb, La) (Zr, Ti) 0)
- a PLZT film with a thickness of about lOOnm to 200nm is formed by RF sputtering.
- heat treatment RTA at 650 ° C or lower in an atmosphere containing Ar and O
- the upper electrode film 11 is formed on the ferroelectric film 10.
- an iridium oxide film having a thickness of about 200 nm to 300 nm is formed by sputtering, for example.
- Oxygen annealing is performed to prevent peeling of the O film.
- an Al 2 O film 12 is formed over the entire surface by sputtering as a protective film.
- the protective film (Al 2 O film 12) prevents hydrogen from entering the ferroelectric capacitor from the outside. Is prevented.
- the lower electrode 9a is formed. Subsequently, for preventing peeling of the Al 2 O film to be formed later
- the ferroelectric capacitor including the lower electrode 9a, the capacitive insulating film 10a, and the upper electrode 11a corresponds to the ferroelectric capacitor 101 in FIG.
- an Al 2 O film 13 is formed on the entire surface by sputtering as a protective film.
- oxygen annealing is performed to reduce capacitor leakage.
- an interlayer insulating film 14 is formed on the entire surface by a high-density plasma method.
- the thickness of the interlayer insulating film 14 is, for example, about 1.
- the interlayer insulating film 14 is planarized by CMP (chemical mechanical polishing). Next, plasma treatment using N 2 O gas is performed. As a result, the interlayer insulating film 1
- the surface layer 4 is slightly nitrided, making it difficult for moisture to enter. This plasma treatment is effective if a gas containing at least one of N and O is used.
- the holes reaching the silicide layer 5 on the high-concentration diffusion layer 22 of the transistor are connected to the interlayer insulating film 14, AlO film 13, silicon oxide film 8b, silicon oxide film 8a, and silicon oxynitride film. 7
- a noria metal film (not shown) is formed by continuously forming a Ti film and a TiN film in the hole by sputtering. Subsequently, a W film is buried in the hole by a CV D (chemical vapor deposition) method, and the W film is flattened by a CMP method, thereby forming a W plug 15.
- CV D chemical vapor deposition
- an SiON film 16 is formed as an oxidation prevention film for the W plug 15 by, for example, a plasma enhanced CVD method.
- the contact hole 40t reaching the upper electrode 11a and the contact hole 40b reaching the lower electrode 9a are formed into the SiON film 16, the interlayer insulating film 14, the Al 2 O 3
- the surface of the W plug 15 is exposed by removing the SiON film 16 over the entire surface by etch back.
- a part of the surface of the upper electrode 1 la, a part of the surface of the lower electrode 9a, and the surface of the W plug 15 are exposed.
- an Al film is formed, and the A1 wiring 17 is formed by patterning the A1 film.
- the W plug 15 and the upper electrode 11a are connected to each other by a part of the A1 wiring 17.
- a silicon oxide film 18 covering the A1 wiring 17 is formed by sputtering.
- the RF power is 2 kW
- the frequency is 13.56 MHz
- the flow rates of Ar gas and O gas are 18 sccm and 2 sccm, respectively
- the pressure in the chamber is 1
- the silicon oxide film 18 grows at a rate of about 30 nmZ.
- the thickness of the silicon oxide film 18 is, eg, about 20 nm to lOOnm. If the silicon oxide film 18 is formed under such conditions, the ferroelectric capacitor already formed is not damaged by the plasma processing. If the thickness of the silicon oxide film 18 is less than 20 nm, damage to the ferroelectric capacitor due to subsequent plasma processing may not be sufficiently suppressed. However, for this effect, it is sufficient that the thickness of the silicon oxide film 18 is lOOnm.
- a high-density plasma oxide film 19 is formed on the entire surface, and the surface thereof is flattened.
- an Al 2 O film 20 is formed on the high-density plasma oxide film 19 as a protective film that prevents intrusion of hydrogen and moisture. Furthermore, high-density plasm on the Al 2 O film 20
- a ma-oxide film 23 is formed.
- the oxide aluminum film is not formed before the high-density plasma oxide film 19 is formed, but instead, the silicon oxide film 18 is formed by sputtering.
- This silicon oxide film 18 also suppresses the plasma damage of the ferroelectric capacitor that may occur during the formation of the high-density plasma oxide film 19 in the same manner as the conventionally formed acid / aluminum film. be able to.
- the high-density plasma oxide film 23 After the formation of the high-density plasma oxide film 23, as shown in FIG. 2M, the high-density plasma oxide film 23, the Al 2 O film 20, the high-density plasma oxide film 19, and the silicon oxide film 18, A1 wiring
- a via hole reaching 17 is formed, and a tungsten plug 24 is embedded therein.
- the silicon oxide film 18 is formed as a film for suppressing plasma damage, and the processing of the silicon oxide film 18 is easier than the oxide aluminum film.
- a shaped via hole can be easily formed. For this reason, conventional via holes It is possible to avoid problems associated with narrowing and etching deposits.
- the wiring 25 the high-density plasma film 26, the Al 2 O film 27, the high-density plasma film 28, the tungsten plug 29, A
- the silicon oxide film 18 that suppresses plasma damage since the silicon oxide film 18 that suppresses plasma damage is formed, it is strong even during the formation of the high-density plasma oxide film 19 that is formed thereafter. Plasma damage does not reach the dielectric capacitor. Further, since the silicon oxide film 18 is easier to process than the oxide aluminum film, it is possible to easily form a contact hole as designed. Regarding the suppression of the entry of hydrogen and moisture from the outside, the silicon oxide film 18 formed by sputtering is not relatively dense but has a high hygroscopic property. it can. A plurality of Al 2 O films are formed above or below the silicon oxide film 18. Therefore, no particular problem occurs.
- the insulating film covering the A1 wiring 17 is a silicon oxide film as described above if the degree of damage to the ferroelectric capacitor at the time of formation is less than that of the oxide aluminum film. It is not limited to 18.
- a CVD oxide film having a thickness of 20 nm or more may be formed under reduced pressure or normal pressure.
- the CVD oxide film also has the advantage of improving throughput with a higher growth rate than the aluminum oxide film.
- the temperature of the atmosphere is preferably 300 ° C to 600 ° C, particularly 300 ° C to 500 ° C. If this temperature range force is also lost, the characteristics of the ferroelectric capacitor will deteriorate, and it will be difficult to obtain a sufficient film formation rate. That is, since the melting point of A1 is about 660 ° C, a CVD oxide film can be formed if the ambient temperature is 300 ° C-600 ° C. In particular, the ambient temperature is preferably 450 ° C or lower.
- TEOS is used as a raw material
- ozone is used as an oxidizing agent
- the thickness is 20 nm or more.
- Ozone TEOS acid film may be formed.
- Ozone TEOS oxide film is not relatively dense, and its hygroscopicity is high, so moisture permeation can be suppressed.
- the temperature of the atmosphere is preferably 400 ° C. to 600 ° C. As described above, if the ambient temperature is higher than 600 ° C., the A1 wiring 17 may melt or the characteristics of the ferroelectric capacitor may deteriorate.
- a plasma CVD oxide film may be formed by applying a two-frequency unbiased plasma CVD method without applying a bias to the substrate.
- the source RF capacity is 3 kW
- the flow rates of SiH gas, O gas and Ar gas are 70 sccm, respectively.
- the plasma CVD oxide film grows at a rate of about 530 nmZ.
- the thickness of the plasma CVD oxide film is, for example, 20 nm or more.
- the acid film formed by such a method can also suppress moisture permeation. In addition, since no bias is applied to the substrate, plasma damage is also suppressed.
- a coating type oxide film such as a SOG (Spin On Glass) film having a thickness of 20 nm or more may be formed! /.
- the annealing process may be performed after applying the SOG raw material by spin coating.
- the SOG raw material include polysilazane, hydrogen silsesquioxane for low water absorption SOG, fluorine-containing hydrogen silsesquioxane, and silica-based porous material. Since the coating type oxide film has high hygroscopicity, moisture permeation can be suppressed.
- a polyimide film may be formed!
- a polyimide material is applied with a thickness of 1200 nm by spin coating, then cured by heat treatment, and then etched back by ashing.
- the temperature is set to 310 ° C and the flow rate of N gas is set to 10 ° C.
- the processing time is 40 minutes.
- the thickness of 500 nm is removed so as to leave about 700 nm.
- Polyimide membranes can also suppress moisture permeation.
- An acid film may be formed by acidifying the surface of the A1 wiring 17 with oxygen radicals, oxygen plasma, or the like.
- the frequency of the source microwave is 2.45 GHz
- the output is 1400 W
- the pressure in the chamber is 133.3 Pa (lTorr)
- O gas and N gas are supplied.
- Flow rates are 1350sccm and 150sccm, respectively, the temperature is 200 ° C, and the treatment time is 70 seconds.
- the for example if treatment is performed with oxygen radicals using a down flow type asher or the like, plasma damage will not occur during this treatment. Further, if the plasma is processed with oxygen plasma while controlling the bias voltage applied to the substrate using a two-frequency plasma apparatus or the like, plasma damage will not occur during this processing. As a result of these treatments, the composition of the surface of the A1 wiring 17 approaches that of alumina, and moisture permeation can be suppressed. Even if the surface of the A1 wiring 17 is oxidized by this method, a via hole can be easily formed in a later process as compared with the case where an aluminum oxide film is deposited.
- An oxide film containing impurities may be formed!
- an acid film for example, PSG (Phospho-Silicate Glass) film, BPSG (Boro-Phospho-Silicate Glass) film and
- FSG Fluoro-Silicate Glass
- sputtering film formation may be performed using a sputtering target containing impurities such as phosphorus, boron, or fluorine.
- an oxide film may be formed by a normal pressure CVD method or a low pressure CVD method using a source gas containing impurities such as phosphorus, boron, or fluorine.
- PH Hydrogen
- the B concentration in the film is preferably about 0-7% by weight.
- the power of the source RF is 3.5 kW
- the frequency is 400 kHz
- the flow rates of SiF gas, SiH gas, O gas, and Ar gas are set respectively.
- the oxide film grows at a rate of about 470 nmZ, and the F concentration in the film is about 11 atomic%. Its refractive index is about 1.42.
- the hygroscopic property of the acid film containing such impurities is higher than that of the acid film containing no impurities. For this reason, permeation
- the Al 2 O film 20 is formed between the high-density plasma oxide film 19 and the high-density plasma oxide film 23, but as shown in FIG. Al O film 20 and high density
- the high density plasma oxide film 19 may be formed thick.
- N annealing or the like is performed, or nitrogen gas is used.
- the silicon oxide film 18 is modified by dehydration, surface nitridation, etc., and the hygroscopicity is further improved.
- ferroelectric film a PZT (PbZr Ti 2 O 3) film, a PZT film with La, Ca, Sr, Si, etc.
- a compound film having a velovskite structure such as a film with a small amount of added, a (SrBi Ta Nb O) film,
- a compound film having a Bi-layered structure such as a BiTiO film may be used. Furthermore, the shape of the ferroelectric film
- the deposition method is not particularly limited, and the ferroelectric film can be formed by sol-gel method, sputtering method, MOCVD method or the like.
- Patent Document 6 describes that, for the purpose of improving the coverage of the interlayer insulating film, a high-frequency bias is applied to the wiring to form a sputtered oxide film on the wiring.
- this method is applied to a ferroelectric memory, a large amount of damage is caused to the ferroelectric capacitor when a notched oxide film is formed as a high-frequency bias is applied.
- Patent Document 7 describes forming various passivation films for the purpose of preventing the occurrence of cracks in the wiring and the passivation film. However, since a plurality of films are formed, the process is complicated. It is also difficult to sufficiently suppress plasma damage.
- Patent Document 8 describes that a sputtered oxide film is formed after the corner of the A1 wiring is cut for the purpose of improving coverage or the like. However, if this method is applied to the ferroelectric memory, the ferroelectric capacitor is damaged when the sputtered oxide film is formed.
- a via hole reaching the wiring can be easily formed. For this reason, problems associated with the formation of via holes are eliminated, desired characteristics can be stably obtained, and yield is improved.
Abstract
Description
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Priority Applications (6)
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CN200580047720.2A CN101116185B (zh) | 2005-03-01 | 2005-03-01 | 半导体装置的制造方法 |
JP2007505765A JP4968063B2 (ja) | 2005-03-01 | 2005-03-01 | 半導体装置及びその製造方法 |
PCT/JP2005/003382 WO2006092846A1 (ja) | 2005-03-01 | 2005-03-01 | 半導体装置及びその製造方法 |
US11/849,715 US20080006867A1 (en) | 2005-03-01 | 2007-09-04 | Semiconductor device and method for manufacturing same |
US12/796,955 US20100248395A1 (en) | 2005-03-01 | 2010-06-09 | Semiconductor device and method for manufacturing same |
US13/271,527 US8895322B2 (en) | 2005-03-01 | 2011-10-12 | Method for making semiconductor device having ferroelectric capacitor therein |
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PCT/JP2005/003382 WO2006092846A1 (ja) | 2005-03-01 | 2005-03-01 | 半導体装置及びその製造方法 |
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CN101617399B (zh) * | 2007-02-27 | 2011-05-18 | 富士通半导体股份有限公司 | 半导体存储器件及其制造、测试方法、封装树脂形成方法 |
WO2016151684A1 (ja) * | 2015-03-20 | 2016-09-29 | 株式会社日立国際電気 | 半導体装置の製造方法、記録媒体及び基板処理装置 |
JP2019075470A (ja) * | 2017-10-17 | 2019-05-16 | ソニーセミコンダクタソリューションズ株式会社 | 半導体記憶装置及び電子機器 |
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- 2005-03-01 WO PCT/JP2005/003382 patent/WO2006092846A1/ja not_active Application Discontinuation
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2007
- 2007-09-04 US US11/849,715 patent/US20080006867A1/en not_active Abandoned
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Also Published As
Publication number | Publication date |
---|---|
US8895322B2 (en) | 2014-11-25 |
JPWO2006092846A1 (ja) | 2008-08-07 |
JP4968063B2 (ja) | 2012-07-04 |
CN101116185B (zh) | 2010-04-21 |
US20100248395A1 (en) | 2010-09-30 |
US20120028374A1 (en) | 2012-02-02 |
US20080006867A1 (en) | 2008-01-10 |
CN101116185A (zh) | 2008-01-30 |
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