WO2007116515A1 - 半導体装置及びその製造方法、ドライエッチング方法、並びに配線材料の作製方法 - Google Patents
半導体装置及びその製造方法、ドライエッチング方法、並びに配線材料の作製方法 Download PDFInfo
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- WO2007116515A1 WO2007116515A1 PCT/JP2006/307499 JP2006307499W WO2007116515A1 WO 2007116515 A1 WO2007116515 A1 WO 2007116515A1 JP 2006307499 W JP2006307499 W JP 2006307499W WO 2007116515 A1 WO2007116515 A1 WO 2007116515A1
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Classifications
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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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3105—After-treatment
- H01L21/311—Etching the insulating layers by chemical or physical means
- H01L21/31105—Etching inorganic layers
- H01L21/31111—Etching inorganic layers by chemical means
- H01L21/31116—Etching inorganic layers by chemical means by dry-etching
-
- 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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/28008—Making conductor-insulator-semiconductor electrodes
- H01L21/28017—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon
- H01L21/28026—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon characterised by the conductor
- H01L21/28035—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon characterised by the conductor the final conductor layer next to the insulator being silicon, e.g. polysilicon, with or without impurities
- H01L21/28044—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon characterised by the conductor the final conductor layer next to the insulator being silicon, e.g. polysilicon, with or without impurities the conductor comprising at least another non-silicon conductive layer
- H01L21/28052—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon characterised by the conductor the final conductor layer next to the insulator being silicon, e.g. polysilicon, with or without impurities the conductor comprising at least another non-silicon conductive layer the conductor comprising a silicide layer formed by the silicidation reaction of silicon with a metal layer
-
- 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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/308—Chemical or electrical treatment, e.g. electrolytic etching using masks
- H01L21/3081—Chemical or electrical treatment, e.g. electrolytic etching using masks characterised by their composition, e.g. multilayer masks, materials
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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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3105—After-treatment
- H01L21/311—Etching the insulating layers by chemical or physical means
- H01L21/31105—Etching inorganic layers
- H01L21/31111—Etching inorganic layers by chemical means
- H01L21/31116—Etching inorganic layers by chemical means by dry-etching
- H01L21/31122—Etching inorganic layers by chemical means by dry-etching of layers not containing Si, e.g. PZT, Al2O3
-
- 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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3105—After-treatment
- H01L21/311—Etching the insulating layers by chemical or physical means
- H01L21/31144—Etching the insulating layers by chemical or physical means using masks
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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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3205—Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
- H01L21/321—After treatment
- H01L21/3213—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer
- H01L21/32139—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer using masks
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
- H01L29/66568—Lateral single gate silicon transistors
- H01L29/66575—Lateral single gate silicon transistors where the source and drain or source and drain extensions are self-aligned to the sides of the gate
- H01L29/6659—Lateral single gate silicon transistors where the source and drain or source and drain extensions are self-aligned to the sides of the gate with both lightly doped source and drain extensions and source and drain self-aligned to the sides of the gate, e.g. lightly doped drain [LDD] MOSFET, double diffused drain [DDD] MOSFET
Definitions
- the present invention relates to a semiconductor device and a method for manufacturing the same, and in particular, by enabling etching without damaging a fragile ArF exposure resist, line edge roughness (LER, STR)
- the present invention relates to a semiconductor device and a method for manufacturing the same that can form a fine pattern of 130 nm or less with high precision by solving the problem of “chaion”.
- the present invention also relates to a dry etching method that can etch a fragile ArF exposure resist without damaging it, and a wiring material manufacturing method that uses this dry etching method.
- a method using a short wavelength laser for example, an excimer laser
- ArF exposure method for example, a mask pattern is formed by transferring a mask pattern to a resist material having methacrylic resin or acrylic resin, and the film covered with the resist mask is dry-etched. Fine processing of holes and grooves. In such microfabrication, a high etching accuracy is required if precise etching shapes are obtained in the lateral and depth directions. Therefore, since etching is performed while increasing anisotropy, a technique for performing dry etching by introducing a predetermined etching gas into a plasma atmosphere is known (for example, see Patent Document 1).
- a resist material used in the ArF exposure method it is known to use a compound having no benzene ring so as to have transparency in the wavelength region of vacuum ultraviolet light.
- this resist material is exposed using an ArF laser, it becomes brittle and has low plasma resistance compared to a resist material having a benzene ring (for example, a KrF exposure resist material).
- a resist material having a benzene ring for example, a KrF exposure resist material.
- the resist mask is exposed to the etchant in the plasma and released from the plasma discharge. Due to the influence of the irradiated ultraviolet light and ion bombardment, the edge of the patterned area becomes rough and the periphery of the pattern is deformed.
- FIGS. 15 ( & ) to (ji) and (& ′) to () are schematic views of a cross-sectional view and a top view of a semiconductor device showing a method for manufacturing a gate of a transistor in a conventional semiconductor device.
- this conventional gate manufacturing method as shown in FIGS. 15 (a) and (a '), first, a gate oxide film 152 is grown on the Si substrate 151 to a predetermined thickness, and then the gate electrode is grown.
- a film for use for example, a laminated film 153 of a polysilicon film 153a and a tungsten film 153b is formed, and then an electric insulating film for a hard mask SiO film 154 is formed (deposited) by a known CVD method or the like. . Then apply anti-reflection coating 155.
- an ArF exposure resist 156 (for example, TARF-P6111 manufactured by Tokyo Ohka Kogyo Co., Ltd.) based on acrylic resin is applied and formed, and the resist film 156 formed thereon is publicly known.
- the resist mask 156 having a pattern for the gate electrode is formed on the laminated film 153 for the gate electrode by exposure using an ArF exposure apparatus (for example, TWINSCAN-XT1400 manufactured by ASML).
- an electrical insulating film such as a SiN film or a SiC film by a CVD method is generally used.
- the pattern of the resist mask 156 is transferred to the electrical insulating film 154 by dry etching the hard mask electrical insulating film 154 covered with the resist mask 156 having such a pattern in a plasma atmosphere. Because the resist mask 156 is fragile, the end of the pattern is distorted and its shape is deformed, a part of the resist is thinned, and sometimes a hole is formed (resist LER). If etching is continued in such a resist mask state, the shape of the pattern that is distorted, deformed, or lacks in the periphery is also transferred to the hard mask 154, as shown in FIGS. 15 (b) and (b '). There is a problem that so-called striation occurs.
- FIGS. 15 (c) and (c ′) As shown in FIG. 8, the striation is transferred as it is to the laminated film 153 for the gate electrode.
- Such striations can sometimes be as large as 50 nm, making it impossible to meet the requirements for high etch cache accuracy.
- the design value is 200 nm. If the pattern has a line width of 100 nm, it is acceptable as a line pattern, but if the line width is designed to be 130 nm or less, if there is a defect of 50 nm from the periphery of the pattern, the remaining line width is relatively acceptable. Not. This cannot be used in the manufacture of fine pattern semiconductor devices.
- the gate of the transistor a material structure in which polysilicon or tanta- sten is stacked thereon is usually used.
- the gate length Lg is an important manufacturing parameter that determines the threshold voltage that distinguishes between ON and OFF when the transistor operates, so it must be accurately controlled. If striation, which is a deformation of the pattern edge, occurs during the etching of the gate material, the gate length Lg is distributed within one gate. As a result, transistors with mixed Lg lengths appear to be connected in parallel, so that the threshold voltage of the transistors becomes broad and sharp on / off characteristics cannot be obtained.
- the threshold voltage becomes broad, it is necessary to provide a margin for the operating voltage of the transistor, so that the power supply voltage is designed to be high, resulting in an adverse effect of increasing power consumption. Also, if there is a variance in the center value of the threshold voltage, it is necessary to design a long logic cycle in order to match the operation timing, so high-speed operation cannot be expected. High power supply voltage and slow logic cycle do not meet the recent demand for product design for high integration and high speed and low power consumption. Therefore, it is important to process with a small gate length Lg distribution in one gate.
- a CVD method is formed on the transistor manufacturing region 161 as shown in FIG. Then, the SiO film 162a is deposited by the etching stopper layer.
- the SiN film 162b After depositing the SiN film 162b, the SiO film 162c is deposited, and the CMP stopper layer and
- the SiN film 162d is deposited again to form the interlayer insulating film 162.
- an ArF resist mask (not shown) having a wiring pattern is formed on the interlayer insulating film 162 using a known ArF exposure technique in the same manner as the above-described gate manufacturing method. Then, by dry etching the interlayer insulating film 162 covered with the resist mask for ArF exposure in a plasma atmosphere and transferring the wiring pattern to the interlayer insulating film 162, grooves and holes for embedding the metal wiring material ( A hole) pattern is formed in the interlayer insulating film 162.
- a TaN163 or the like is formed as a barrier metal in the groove or hole formed here by a known sputtering method, and then a Cu film is formed by a Cu plating method to embed a metal wiring material. Finally, the Cu wiring 164 is completed by applying a known CMP method.
- Deep constriction 165 occurs in the die, and noria metal 163 cannot sufficiently enter it, resulting in insufficient barrier performance, and Cul64 as a wiring material penetrates and diffuses into the thin film, causing adjacent wiring to short-circuit Occurs. If the degree of this short circuit is light, it will cause current leakage, and if it changes over time, it will also cause the product's field to be poor.
- product failure refers to the occurrence of defects during the period in which products with semiconductor devices are distributed in the market.
- the wiring of the semiconductor device is formed by embedding a barrier metal film and a Cu film in the groove in which the striation is generated, the striation in the groove is transferred as a wiring striation. Since the number of wiring layers in semiconductor devices exceeds 10 in normal system LSIs and memory devices, it is important to reduce striations that can reduce yield. .
- the occurrence of striation can be suppressed by using a resist having a benzene ring for KrF exposure as a mask.
- the resist used for KrF exposure is UV irradiation by plasma generated in the chamber during dry etching and the etching gas CF is
- a mixed gas containing a fluorocarbon gas is introduced into a low-pressure plasma atmosphere, and a resist formed by an ArF exposure method is used as a mask (interlayer insulating film).
- a technique for dry-etching has been proposed (see, for example, Patent Document 2).
- the etching rate is reduced even if the generation of striation can be suppressed, resulting in poor economic practicality.
- the applicant of the present invention uses an ArF exposure (photolithography) method as a dry etching method of an interlayer insulating film that can suppress the occurrence of the above-described striation and obtain high etching processing accuracy.
- the interlayer insulating film covered with the resist mask formed using as an etching gas is a halogen-based gas (no, rogen is F, I, Br), and at least one force of I and Br at the atomic composition ratio
- a dry etching method for an interlayer insulating film in which holes and grooves are finely processed by dry etching in a plasma atmosphere while introducing a fluorocarbon compound gas that is 26% or less of the total amount of halogen and the remainder is F.
- Japanese Patent Application 2004-294882 Japanese Patent Application 2004-294882
- this prior application describes that this etching method is useful for manufacturing a semiconductor device that requires a pattern dimension of 130 nm or less.
- Patent Document 1 Japanese Patent Laid-Open No. 11 31678 (Claims)
- Patent Document 2 Japanese Patent Application No. 2004-56962 (for example, claims)
- Non-Patent Literature l Koji Nozaki and Ei Yano, FUJITSU Sei.Tech.J., 38,1 P3- 12 (June 200
- the ArF exposure technique must be used as a method for manufacturing a semiconductor device including a fine pattern of 130 nm or less, particularly lOOnm or less. Since the ratio of striation to pattern dimensions such as width or contact hole diameter has increased, there has been a problem that the manufacturing yield of the semiconductor device is reduced.
- the present invention solves the above-described problems of the prior art without damaging a fragile resist mask for ArF exposure even with a fine pattern of 130 nm or less formed using ArF exposure technology. It is an object of the present invention to provide a semiconductor device and a method for manufacturing the semiconductor device which can improve the manufacturing yield by suppressing the generation of striation by enabling the etching.
- Another object of the present invention is to provide a dry etching method capable of etching without damaging a fragile ArF exposure resist and a method for producing a wiring material using the dry etching method.
- a semiconductor device uses ArF exposure technology.
- the thin film has a pattern width and a pattern.
- a resist mask having a pattern in which either or both of the distance between the pattern and the pattern is 32 to 130 nm, and a halogenated carbon compound gas as an etching gas (however, the halogen is at least two of F, I and Br,
- the resist mask force is transferred by etching using at least one of I and Br having an atomic composition ratio of 26% or less of the total amount of rogen atoms.
- a thin film covered with a resist mask having a pattern formed by using ArF exposure technology is dry-etched in a plasma atmosphere to form a hard mask, which is further etched.
- the hard mask force In a semiconductor device including a portion to which the pattern is transferred, the portion to which the pattern is transferred has a pattern width and / or a pattern-to-pattern spacing of 32 to 130 nm.
- a halogen-carbon compound gas as an etching gas (however, halogen is at least two of F, I and Br, and at least one of I and Br is an atomic composition ratio of the total amount of halogen atoms) Is transferred from the resist mask to the hard mask by etching using the It characterized by having a Domasuku force further rotation photographed pattern.
- a thin film covered with a resist mask having a pattern formed by using ArF exposure technology is dry-etched in a plasma atmosphere to form the pattern on the thin film.
- a halogenated carbon compound gas (however, halogen is at least two of F, I and Br, and at least one of I and Br is 26% or less of the total amount of halogen atoms in terms of atomic composition ratio) is used. And etching.
- a resist pattern having a pattern width and Z or a pattern-to-pattern spacing of 32 to 130 nm is used as a mask, and a stable compound is used as an etching gas. Since a fluorocarbon compound gas containing at least one of I and Br, which is itself an etchant for Si and the like, is applied, etching of fine patterns with pattern dimensions of 13 Onm or less is applied. In addition, the generation of striations, which are a large proportion of the pattern dimensions, is suppressed, and the density of F atoms in the plasma atmosphere is reduced without resorting to lowering the pressure during etching. Damage to the resist mask is reduced.
- the resist mask force can also be used to precisely etch the underlying material using the pattern transferred to the thin film as a node mask, the resist pattern can be transferred to the underlying material with high precision via this hard mask. Will be able to.
- an electric insulating film can be applied.
- the electric insulating film is an interlayer insulating film
- a metal wiring material is further embedded in the transferred pattern by a damascene method. You can also
- this electrical insulating film also has a material force including C or N, and its relative dielectric constant is 1.5 or more, 3.
- a conductive film containing W, Ti, Ta, Co, or Ni, a polysilicon film, or a stacked film of the conductive film and a polysilicon film can be used.
- the present invention is suitable as a memory, a logic device, a system LSI, or a semiconductor device that includes a part of the selected memory, logic device, system LSI, and manufacturing method thereof.
- the dry etching method of the present invention is a pattern formed by using ArF exposure technology, wherein a pattern width and / or a distance between patterns is 32 to 130 nm.
- a thin film covered with a resist mask having an etching gas As a halogenated carbon compound gas (provided that halogen is at least two of F, I and Br, and at least one of I and Br is no more than 26% of the total amount of rogen atoms in terms of atomic composition ratio).
- the pattern is transferred to the thin film by dry etching in a plasma atmosphere.
- the resist material can be precisely etched using the pattern transferred to the thin film as a node mask.
- the pattern can be transferred to the base material with high accuracy.
- an electric insulating film can be applied.
- the electric insulating film is an interlayer insulating film, a metal wiring material can be further embedded in the transferred pattern by a damascene method.
- this electrical insulating film is made of a material containing C or N, and it is desirable that the relative dielectric constant force be in the range of 1.5 or more and 3.7 or less.
- the underlying material of the thin film using the thin film to which the pattern is transferred as a mask, and this underlying material can be used as a gate electrode film or a Si substrate.
- a conductive film containing W, Ti, Ta, Co, or Ni, a polysilicon film, or a stacked film of the conductive film and the polysilicon film can be used.
- a semiconductor device when a semiconductor device is manufactured by etching a fine pattern having a pattern dimension of 130 nm or less, plasma etching of a thin film is possible without causing damage (deformation or defect) to the resist mask. Therefore, precise thin film processing is possible even for fine patterns of 130 nm or less. Therefore, holes and trenches can be formed in the insulating film while overcoming the problem of striation, and the resist pattern can be used as a base material by precisely etching the base material using the insulating film pattern as a mask. It is possible to transfer accurately.
- a hole, a groove, or the like without striation can be formed, a semiconductor device including wiring with a precise dimension, a gate of a transistor, and the like can be manufactured. Therefore, even with a pattern of 130 nm or less, damage such as deformation around the pattern can be suppressed to 50 nm or less, so that a semiconductor device that functions as designed can be provided at a high yield.
- the effect of the etching gas used in the present invention does not depend on the pattern dimension. It is also effective in manufacturing semiconductor devices of the nm, 65 and 45 nm generations.
- FIG. 1 is a schematic cross-sectional view showing an example of a semiconductor device according to the present invention.
- the semiconductor device a of this embodiment, a part of the surface of the silicon crystal 1 is covered with the gate oxide film 2 and the silicon crystal 1 includes element isolation (STI: Shallow
- Trench Isolation structure 3, deep source and drain 4 and shallow source and drain 5 are arranged.
- a gate electrode 11 made of a laminated film of a polysilicon film 11a and a tungsten (W) film ib is disposed on the gate oxide film 2 .
- the tungsten wires 12 that are electrically connected to these source / drains are connected to the upper layer wire made of the barrier metal film (TiN film) 10 and copper (Cu) 13, and these tungsten wires 12 are electrically connected to each other.
- the insulating BPSG film 7 is sandwiched between the lower SiO film 6 and the upper SiN film 8. Similarly, a barrier film is formed on the SiN film 8.
- TEOS—SiO film 9 is formed to insulate the upper layer wiring, which also has the force of Tal 10 and Cul3, from each other.
- a fluorocarbon compound gas that forms a stable compound and itself contains at least one of I and Br that function as an etchant for Si.
- the fluorinated carbon compound gas is one of iodinated fluorinated carbon compound gas and brominated fluorinated carbon compound gas, or a mixed gas thereof.
- the semiconductor device a according to the present embodiment includes a thin film having a pattern that is dry-etched without being damaged by the etching gas and the resist mask force is also transferred, the STI3, the gate electrode 11, and the W wiring 12 are provided. And there is no striation in the pattern structure of Cu wiring 13 etc. Therefore, it is possible to provide a transistor having a small distribution of the gate length Lg and a sharp on / off characteristic, and a wiring with reduced wiring leakage. In addition, the incidence of defects based on changes over time such as Cu diffusion due to striation is small.
- the chucking device 21 uses a discharge plasma (NLD plasma) generated in a region including a magnetic field zero, and includes a vacuum chamber 23 provided with a vacuum exhaust means 22 such as a dry pump, a rotary pump, a turbo molecular pump, or the like.
- NLD plasma discharge plasma
- a vacuum exhaust means 22 such as a dry pump, a rotary pump, a turbo molecular pump, or the like.
- the chamber 23 includes an upper plasma generation chamber 23a having a cylindrical side wall 23c made of a dielectric material such as quartz and a lower substrate processing chamber 23b.
- Three magnetic field coils 24a, 24b and 24c are provided on the outer side of the cylindrical side wall 23c at a predetermined interval to constitute a magnetic field generating means.
- the three magnetic field coils 24a, 24b and 24c are attached to a yoke member 25 made of a high magnetic permeability material so as to surround the outside also with vertical force.
- a current in the same direction is supplied to the upper and lower magnetic field coils 24a and 24c, and a reverse current is supplied to the intermediate coil 24b.
- a continuous zero magnetic field position is formed on the inner side of the cylindrical side wall 23c near the level of the intermediate coil 24b, and an annular magnetic neutral line is formed.
- the size of the annular magnetic neutral line can be appropriately set by changing the ratio of the current flowing through the upper and lower coils 24a and 24c and the current flowing through the intermediate coil 24b.
- the vertical position can be set as appropriate by the ratio of the currents flowing through the upper and lower magnetic field coils 24a and 24c.
- An antenna 26a for generating a high-frequency electric field is provided between the intermediate coil 24b and the cylindrical side wall 23c, and this antenna is connected to a high-frequency power source 26b to constitute a magnetic field generating means. Then, NLD plasma is generated along the annular magnetic neutral line formed by the three magnetic field coils 24a, 24b and 24c.
- a substrate electrode 27 having a circular cross-section which is a substrate mounting portion on which the processing substrate S is mounted, faces a surface formed by the annular magnetic neutral line via an insulator 28. It is provided.
- the substrate electrode 27 is connected to the second high-frequency power source 29b via the capacitor 29a, and becomes a floating electrode in terms of potential and has a negative noise potential.
- the top plate 23d above the plasma generation chamber 23a is hermetically fixed to the upper part of the cylindrical side wall 23c, and is in a floating state in potential to form a counter electrode.
- a gas introduction means 30 for introducing an etching gas into the chamber 23 is provided on the inner surface of the top plate.
- Stage 30 is connected to a gas source via gas flow control means (not shown).
- Ar and etching gas for example, CFI gas
- a silicon wafer 31 is prepared, and an oxide film is grown about lOnm at about 900 ° C. using a known acid furnace, and FIG. As shown in b), an SiO film 32 is formed.
- a SiN film 33 is formed to a thickness of about 90 nm at about 800 ° C using a known LP-SiN furnace, and then a resist mask having a lOOnm groove pattern using ArF exposure. 34 is formed.
- the SiO film 32 and the SiN film 33 covered with the resist mask 34 are combined with a halogen as shown in FIG. 3 (d).
- Etching using a carbon nitride compound gas (however, halogen is at least two of F, I and Br, and at least one of I and Br is 26% or less of the total amount of halogen atoms in terms of atomic composition ratio).
- the resist mask 34 is removed by ashing to form hard masks 32, 33. At this time, striations are not allowed in the hard masks 32 and 33.
- a trench pattern 35 having a width of lOOnm is formed in the silicon wafer 31, as shown in FIG. 3 (f). Since the hard masks 32 and 33 to which the pattern is transferred are smooth, no striation is generated in the groove pattern 35.
- a known HDP—CMP Chemical Mechanical Polishing
- a known ICP etcher is used.
- the oxide film removal process using dilute hydrofluoric acid (HF) As shown in FIG. 4C, a silicon wafer 31 having a flattened surface and an STI structure 35a is obtained.
- a gate oxide film 42 is grown by an acid-soaking process at about 850 ° C., and as shown in FIG. A polysilicon film 43 is deposited to 150 nm by CVD, a W film 44 is deposited to a thickness of about 200 nm, and a gate electrode film is laminated. Then, PE—TEOS (tetraethoxysilane)-for a hard mask is used. A SiO film 45 is formed to a thickness of 200 nm.
- PE—TEOS tetraethoxysilane
- a gate electrode pattern 46 is formed by a gate exposure process using an ArF exposure method.
- the above-described halogenated carbon compound gas (however, halogen 2) using the etching apparatus 21 of FIG. 2 using at least two of F, I and Br, and at least one of I and Br is 26% or less of the total amount of halogen atoms by atomic composition ratio).
- the hard mask 45 shown in FIG. 4 (g) is formed.
- this hard mask 'etching step no striation occurs, so that a hard mask 45 having a smooth shape can be formed.
- the gate electrode 51 is completed by etching the W film 44 and the polysilicon film 43 with a known ICP etcher or the like as the gate etch.
- the resist pattern 46 is etched out (disappeared) during this etching. Also here, since the pattern is transferred to the gate electrode 51 from the hard mask 45 formed by suppressing the occurrence of striation according to the present invention, no striation is observed in the gate electrode 51.
- a SiN film 53 is grown by a PE-CVD process at about 400 ° C., and RIE (Reactive Ion Etching: reactive ion etching) is used.
- RIE reactive Ion Etching: reactive ion etching
- a PE—SiN film 55 is deposited to about lOOnm, and then shown in FIG. 5 (e).
- a BPSG (boro-phosphosilicate glass) film 56 is grown to 700 nm, and then annealed at 800 ° C. Then, by applying the known ILD-CMP, the BPSG film 56 is polished and removed so that the protrusions are eliminated, so that the flattened first interlayer insulating film 56a is formed as shown in FIG. 6 (a). Form.
- a TEOS-SiO cap film 61 by CVD is grown at about 400 ° C. on the flattened insulating film 56a, and then the structure shown in FIG. c) ArF exposure method as shown in
- a resist mask 63 having a contact hole pattern 62 having a diameter of about lOOnm is formed.
- TEOS-SiO film 61 covered with this resist mask 63 is formed.
- the resist mask 63 is peeled off by a known ashing method, and as shown in FIG. 7 (a), a TiN film is formed as a norimetal 71 by about 20 nm CVD, and then as shown in FIG. 7 (b). Then, a CVD-W film 72 is formed to a thickness of about 50 nm to fill the contact hole 64. Subsequently, by using a known W-CMP method, using the barrier metal 71 as a stopper, the excess W film is polished and removed, and then the rare metal film 71 is also removed, so that a W plug 73 as shown in FIG. Form. These W plugs establish electrical connection with the source / drain 54 and the gate electrode 51. A contact plug to the gate electrode 51 is not shown.
- a method for forming a Cu wiring in the transistor formed as described above by a single damascene process will be described below.
- a PE-SiN cap film 74 is first grown at about 400 ° C. by about 50 nm by a known plasma CVD method.
- the TEOS-SiO film 81 is formed to about 250 nm by plasma CVD.
- the PE-SiN film 82 is grown 50 nm in the same manner as the PE-SiN film 74. Subsequently, an ArF resist film 84 having a wiring pattern 83 is formed to a thickness of about 200 nm using the ArF exposure method.
- the wiring pattern 83 is a fine wiring having a wiring width and Z or a wiring interval of 130 nm or less, and may be lOOnm or less for further miniaturization.
- striation is generated from the ArF resist mask 84 to the PE-SiN film 82 by dry etching using the above-described halogen-carbon compound gas according to the present invention.
- the pattern is transferred without being transferred (FIG. 8 (b)), and the etching is continued up to the lower TEOS-SiO film 81 as shown in FIG. 9 (a).
- the wiring pattern is striations.
- the resist mask 84 is peeled off by a normal microwave asher, and further SiN etching is performed by an ICP etching apparatus, so that the bottom force of the wiring groove 83a is also reduced as shown in FIG. 9B. Remove 74.
- a TaN film is formed by about 1Onm using a known sputtering method, and then a Ta film is formed by about 15nm. Further, after forming a Cu film 102 of about 1 ⁇ m by the Cu plating method, annealing at about 200 ° C. is performed. Finally, by using the CMP method, as shown in FIG. 10B, the excess Cu film is removed by polishing using the Ta film of the rare metal film 101 as a stop layer. As a result, the pattern transferred from the resist mask 84, that is, the wiring groove 83a is filled with Cul02b to be a metal wiring by the damascene method.
- the barrier metal film 101 and the Cu film 102 are embedded in the groove pattern 83 formed smoothly by applying the etching method according to the present invention. Since there is no striation 165 like the conventional Cu wiring 164 shown in FIG. 16, no diffusion of Cu into the interlayer insulating film 81 can occur. Therefore, in the semiconductor device a according to the present embodiment, the occurrence of defects such as leakage between wirings due to Cu diffusion caused by the striation 165 in the conventional Cu wiring 164 is caused by the wiring width and Z or the wiring interval being 130 nm or less. Even a fine pattern can be completely prevented, so that the manufacturing yield of semiconductor devices can be remarkably improved.
- a fluorine-containing carbon compound gas containing at least one of I and Br, which forms a stable compound and has its own function as an etchant for Si is used as a gas for etching the insulating film.
- the fluorinated carbon compound gas is one of iodinated fluorinated carbon compound gas and brominated fluorinated carbon compound gas, or a mixed gas thereof.
- a mixed gas containing at least one kind or two or more kinds selected from these fluorocarbon compound gases and HI or Br is preferable. If the number of n exceeds 3, problems such as contamination of the inside of the chamber occur during etching, which is not practical.
- an iodinated fluorocarbon compound gas such as CFI or C F
- Brominated fluorocarbon compound gases such as Br can also be used.
- atomic composition ratio atomic composition ratio
- a mixed gas of CF Br and a fluorocarbon compound may be used.
- the etching gas may be a mixed gas of CF and C FI or C F Br, or HI
- a mixed gas may be used.
- the total amount of gases introduced into the chamber is included in the etching gas. It is preferable to add about 3 to 15% of oxygen with respect to the flow rate. In this case, if it is less than 3%, the above effect cannot be achieved, and the amount of deposition cannot be adjusted. On the other hand, if it exceeds 15%, the ArF resist will be damaged and etched.
- an acid such as SiO is used as the insulating film etched using the etching apparatus 21.
- Dielectric constants of SiOCH materials formed by spin coating such as HSQ and MSQ, SiOC materials formed by CVD, or SiOF films formed by CVD method 1.5-3. 7 Low-k materials, including porous materials.
- SiOCH-based material examples include a product name NCSZ catalyst manufactured by Kosei Kogyo Co., Ltd., a product name LKD 5109r5ZjSR, a product name HSG-7000 / Hitachi Chemical Co., Ltd., and a product name HOSP / Honeyw. ell
- SiOC-based material examples include, for example, trade name Aurola 2. 7 / manufactured by ASM Japan, trade name Aurol a2.4 / manufactured by ASM Japan, trade name Orion 2. 7ZTRIKON, trade name Coral / Novellus, Product name Black Diamond / AMAT, etc.
- an inductively coupled (ICP plasma) etching apparatus (not shown) is used, and an etching gas containing fluorocarbon gas (CF 3) is introduced in a plasma atmosphere under an operating pressure of 1 to 3 Pa.
- ICP plasma inductively coupled
- CF 3 etching gas containing fluorocarbon gas
- the resist mask is damaged by exposure to the plasma, rough rough and deformation (edge to an edge portion of the resist mask ) Occurs (referred to as striation). If the oxide film etching is continued in this state, the shape is transferred to the holes and grooves, and the film striations occur.
- a pressure lower than a normal pressure (1 Pa or more) (0.3).
- Plasma discharge is possible even at -0.7 Pa). Using this, ethane gas at low pressure with CF gas
- Degradation species generated by decomposing 8 include F, CF, CF, CF, etc.
- the TEOS gas force is also formed on the silicon substrate (Ueno) as the insulating film by the plasma CVD method.
- an ArF exposure resist film was applied and formed in succession to the antireflection film so as to cover the insulating film, and then a wiring pattern including a groove having a width of lOOnm was formed by using the ArF exposure technique. Then, the insulating film covered with the resist film having the wiring pattern was dry-etched in a plasma atmosphere.
- the flow rate of 37 was set to 50 sccm, and the flow rate of oxygen was set to 20 sccm.
- the output of the high frequency power supply 26b connected to the plasma generating high frequency antenna coil 26a was set to lkW, the output of the high frequency power supply 29b connected to the substrate electrode 27 was set to 0.3kW, and the substrate temperature was set to 10 ° C.
- FIG. 11 (a) shows an SEM photograph of the obtained groove state observed from the top surface of the substrate.
- a groove pattern 112a having a width of lOOnm was smoothly formed in the insulating film 11 la, and a silicon crystal as a base material was observed at the bottom of the groove pattern 112a.
- the occurrence of striation in the groove was suppressed to less than 3 nm. Therefore, according to the present invention, since it is clear that no defect due to the striation of the wiring groove pattern occurs, it was proved that the yield reduction due to the defect due to the striation can be completely prevented.
- FIG. 11 (a) shows an SEM photograph of the obtained groove state observed from the top surface of the substrate.
- the groove pattern 112b with a width of about lOOnm was formed in the insulating film 11 lb.
- the wiring width force of the design value lOOnm was 100 nm ⁇ 15 after etching. % Distribution is confirmed.
- the metal wiring material is buried in the wiring groove 112b in which the striation 113 is generated in this way, the yield in the wiring process is reduced due to the above-described Cu diffusion or the like.
- a groove pattern was obtained with the same effect without striation.
- a TEOS—SiO film 122a is formed on the Si substrate 121 by plasma CVD at 400 ° C.
- a 50 nm film was formed, and then a cap-SiN film 122b was grown to a thickness of 50 nm.
- a TEOS-SiO interlayer insulation film 122c where Cu wiring is to be formed is formed to a thickness of 200nm at 400 ° C by a known plasma CVD method.
- a plasma silicon nitride film (p—SiN) 122d as a CMP stopper was grown at 400 ° C. to a thickness of 30 nm.
- This SiN film 122d was coated with Regis KShipley product name: UV-6) for ArF exposure.
- an antireflection film BA RC (manufactured by Tokyo Ohka Kogyo Co., Ltd.)
- BA RC manufactured by Tokyo Ohka Kogyo Co., Ltd.
- the wiring pattern was developed as a groove.
- the SiN film 122d and the SiO interlayer insulating film 122c are formed under the following process conditions. Etching was performed to form a groove in the SiO film 122c.
- a TaN film 123 was uniformly grown to a thickness of 10 nm in the formed groove by sputtering.
- Fig. 12 (a) The cross-sectional structure of the sample obtained through the above steps (1) to (11) is shown in Fig. 12 (a), the top view of the sample is shown in Fig. 12 (b), and the line X in Fig. 12 (a).
- a top view of the Cu wiring cut at -X is shown schematically in Fig. 12 (c).
- FIG. 16 (c) schematically shows a case where the striation 165 portion is enlarged by cutting along the line XX in FIG.
- the CF gas shown in Fig. 16 (b) was used.
- the design value of the line width is increased so that the narrowest part in the past does not occur below the design value.
- the chip can be designed small. Therefore, the cost can be reduced compared with the conventional case, and price competitiveness can be obtained.
- a barrier metal film (TiN film, TaN film, etc.) becomes thin and Cu diffuses from there.
- the reliability of the barrier metal as a Cu diffusion noria increases. Since defects caused by a strike such as wiring according to the prior art can be prevented, the manufacturing yield of the semiconductor device a can be improved.
- reaction occurs in the reaction chamber to generate CFI gas, and this gas
- Figures 13 (a) to (c) and (a ') to (c') show the main steps.
- a sectional view and a top view of the obtained semiconductor device are schematically shown.
- the transistor isolation process before gate fabrication, the gate insulation film fabrication process, the sidewall formation after etching the gate material, and the source / drain diffusion process can be performed according to known methods. I do not explain.
- a doped amorphous Si (a-Si) film 133a is formed to a thickness of 200 nm by a known CVD method at 500 ° C. Was deposited.
- a tungsten (W) film 133b was grown to a thickness of 200 nm by CV D at 400 ° C.
- a plasma oxide film (TEOS-SiO2) is formed on the tungsten film 133b as a hard mask.
- the hard mask 134 was coated with Regis KShipley's trade name: UV-6) 136 for ArF exposure.
- an antireflection film (BARC) 135 is coated, and then a resist 136 for ArF exposure is coated to a thickness of 300 nm.
- the plasma oxide film 134 was etched by 200 nm under the following process conditions.
- the gate electrode structure 137 obtained through the above steps (1) to (10) the pattern of the resist mask 136 is transferred without generating striation when the hard mask 134b is formed.
- the pattern was transferred from the hard mask 134b having smooth side walls by etching to form a gate electrode structure 137. Therefore, since the gate electrode structure 137 can be formed from the resist mask 136 with the gate length as designed, the generation of the gate length Lg due to the stripe can be completely suppressed.
- a known thermal oxide film is used as the gate oxide film, but a high dielectric constant gate oxide film (eg, HfO 2) may be used.
- a force using a laminated structure of an amorphous silicon film and a tungsten film as a gate structure may use a polysilicon film instead of an amorphous silicon film, and tungsten (W), titanium (Ti), tantalum (Ta), A metal film (conductive film) containing cobalt (Co) or nickel (Ni) alone may be used.
- the force can be applied to a finer pattern (possible to about 50 nm or less) which is resolved by force ArF immersion exposure, electron beam exposure, etc. with a gate length of 80 nm.
- the force that generated a gate length distribution of ⁇ 15% (expressed as% of (maximum minimum) Z (maximum + minimum)) when evaluated with the shortest and longest.
- the distribution range of the gate length was within ⁇ 5%, and the roughness of the edge portion was less than 5 nm.
- etching is performed by a method that suppresses the generation of striations.
- a finished semiconductor device having a smaller gate length Lg distribution than in the past.
- the present invention it is possible to obtain a smooth side surface even in the manufacture of a transistor using the side surface of the Si crystal as a channel.
- a method for manufacturing a channel of a fin-type transistor will be described as a method for manufacturing a semiconductor device according to the present invention.
- 14A to 14E and 14A to 14E are a cross-sectional view and a top view schematically showing a method for manufacturing a channel of a fin-type transistor to which the present invention is applied, respectively. Since the fin-type transistor uses the side surface of the Si crystal as a channel, there is a problem that transistor characteristics deteriorate due to surface scattering when striations occur during etching of the Si crystal as in the past.
- a thermal oxide film 142 is grown on a silicon wafer 141, and an ArF exposure resist 144 is formed after the antireflection film 143 by coating.
- the resist film 144 having a fine pattern for channel formation was formed by patterning the resist film 144 using a known ArF exposure method. In order to make the channel potential follow the gate potential, this fine pattern is usually desirably less than lOOnm.
- the thermal oxide film 142 covered with the resist mask 144 was etched in a plasma atmosphere using the same process conditions as in Example 3 to form a hard mask 142b (FIG. 14 ( b)).
- a hard mask 142b due to the action of the present invention, generation of striation was recognized in the hard mask 142b.
- etching is continued using a mixed gas of chlorine (C 1) and HBr that can be etched by silicon as an etching gas system.
- the pattern was transferred to Eno 141 (see Fig. 14 (c)). No striations of 3 nm or more were observed in the silicon wafer 141d transferred with the pattern from the hard mask 142b.
- the fin-type channel 141d is produced by dissolving and removing the hard mask 142c with about 0.5% dilute hydrofluoric acid. Then, the silicon wafer 141 having the fin-type channel 141d pattern is thermally oxidized to form a gate oxide film 145. Grown up. Thereby, the fin-type channel 141d was produced.
- a gate electrode having a polysilicon isotropic force is formed on the fin-type channel 141d according to a known method to complete a fin-type transistor. Since there are many known examples of the method for forming the gate electrode, it will not be described here.
- the fine silicon line 141d formed in the silicon crystal 141 can be smoothly formed on the side wall without generating striations, this side wall is used as a channel. It is possible to control the fin-type transistor with high accuracy. Industrial applicability
- the present invention can be used as a memory, a logic device, a system LSI, or a semiconductor device partially including these, and a manufacturing method thereof, in which DRAM and flash memory capabilities are also selected.
- FIG. 1 A schematic cross-sectional view of a semiconductor device obtained by manufacturing a gate of a transistor by applying the dry etching method of the present invention.
- FIG. 2 is an arrangement cross-sectional view schematically showing an example of an etching apparatus used in the dry etching method of the present invention.
- FIG. 3 is a cross-sectional view of the semiconductor device showing the first step in the process for explaining the embodiment of the method for producing the semiconductor device according to the present invention.
- FIG. 4 is a cross-sectional view of a semiconductor device for illustrating a step subsequent to the process of FIG. 3.
- FIG. 5 is a cross-sectional view of a semiconductor device for illustrating a step subsequent to the process of FIG.
- FIG. 6 is a cross-sectional view of a semiconductor device for illustrating a step subsequent to the process of FIG.
- FIG. 7 is a cross-sectional view of a semiconductor device for illustrating a step subsequent to the process of FIG. 6.
- FIG. 8 is a cross-sectional view of a semiconductor device for illustrating a step subsequent to the process of FIG.
- FIG. 9 is a cross-sectional view of a semiconductor device for illustrating a step subsequent to the process of FIG. 8.
- FIG. 10 is a cross-sectional view of a semiconductor device for explaining a wiring formation step subsequent to the process of FIG.
- FIG. 11 is an SEM photograph (a) of the state of the groove obtained in Example 1 observed from the top surface of the substrate and an SEM photograph in the case of a conventional example for comparison.
- FIG. 12 is a cross-sectional structure of the sample obtained in steps (1) to (11) of Example 2 (a), and a schematic upper surface thereof.
- Figure (c) shows a cross section of the wiring taken along line XX in Figures (b) and (a).
- FIG. 15 is a schematic view of cross-sectional views (a) to (c) and top views (a ′) to (c ′) of a semiconductor device showing a conventional transistor gate manufacturing method.
Abstract
Description
Claims
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JP2006553383A JPWO2007116515A1 (ja) | 2006-04-07 | 2006-04-07 | 半導体装置及びその製造方法、ドライエッチング方法、配線材料の作製方法、並びにエッチング装置 |
PCT/JP2006/307499 WO2007116515A1 (ja) | 2006-04-07 | 2006-04-07 | 半導体装置及びその製造方法、ドライエッチング方法、並びに配線材料の作製方法 |
PCT/JP2007/057749 WO2007116964A1 (ja) | 2006-04-07 | 2007-04-06 | 半導体装置及びその製造方法、ドライエッチング方法、配線材料の作製方法、並びにエッチング装置 |
JP2007518985A JP4768732B2 (ja) | 2006-04-07 | 2007-04-06 | 半導体装置及びその製造方法、ドライエッチング方法、配線材料の作製方法、並びにエッチング装置 |
US12/830,995 US8125069B2 (en) | 2006-04-07 | 2010-07-06 | Semiconductor device and etching apparatus |
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PCT/JP2006/307499 WO2007116515A1 (ja) | 2006-04-07 | 2006-04-07 | 半導体装置及びその製造方法、ドライエッチング方法、並びに配線材料の作製方法 |
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US11/664,091 A-371-Of-International US20090102025A1 (en) | 2006-04-07 | 2006-04-07 | Semiconductor device and method for manufacturing the same, dry-etching process, method for making electrical connections, and etching apparatus |
US12/830,995 Continuation US8125069B2 (en) | 2006-04-07 | 2010-07-06 | Semiconductor device and etching apparatus |
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PCT/JP2007/057749 WO2007116964A1 (ja) | 2006-04-07 | 2007-04-06 | 半導体装置及びその製造方法、ドライエッチング方法、配線材料の作製方法、並びにエッチング装置 |
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Cited By (2)
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US20140077126A1 (en) * | 2008-01-04 | 2014-03-20 | Micron Technology, Inc. | Method of etching a high aspect ratio contact |
JP2017501581A (ja) * | 2014-01-03 | 2017-01-12 | クアルコム,インコーポレイテッド | 導電層ルーティング |
Families Citing this family (5)
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JP2009123866A (ja) | 2007-11-14 | 2009-06-04 | Nec Electronics Corp | 半導体装置の製造方法、および被エッチング膜の加工方法 |
JP2012028431A (ja) | 2010-07-21 | 2012-02-09 | Toshiba Corp | 半導体装置の製造方法 |
JP6053490B2 (ja) * | 2011-12-23 | 2016-12-27 | 株式会社半導体エネルギー研究所 | 半導体装置の作製方法 |
TWI642809B (zh) * | 2013-09-09 | 2018-12-01 | 法商液態空氣喬治斯克勞帝方法研究開發股份有限公司 | 用蝕刻氣體蝕刻半導體結構的方法 |
KR102390158B1 (ko) | 2017-06-08 | 2022-04-25 | 쇼와 덴코 가부시키가이샤 | 에칭 방법 |
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JP2005123314A (ja) * | 2003-10-15 | 2005-05-12 | Semiconductor Leading Edge Technologies Inc | パターン形成方法 |
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US7723235B2 (en) * | 2004-09-17 | 2010-05-25 | Renesas Technology Corp. | Method for smoothing a resist pattern prior to etching a layer using the resist pattern |
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JP2002289594A (ja) * | 2001-03-28 | 2002-10-04 | Nec Corp | 半導体装置およびその製造方法 |
JP2004152862A (ja) * | 2002-10-29 | 2004-05-27 | Fujitsu Ltd | 半導体装置の製造方法 |
JP2005268321A (ja) * | 2004-03-16 | 2005-09-29 | Matsushita Electric Ind Co Ltd | 半導体装置の製造方法 |
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JP2017501581A (ja) * | 2014-01-03 | 2017-01-12 | クアルコム,インコーポレイテッド | 導電層ルーティング |
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