WO2009157438A1 - カソードユニット及びこのカソードユニットを備えたスパッタリング装置 - Google Patents
カソードユニット及びこのカソードユニットを備えたスパッタリング装置 Download PDFInfo
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- WO2009157438A1 WO2009157438A1 PCT/JP2009/061397 JP2009061397W WO2009157438A1 WO 2009157438 A1 WO2009157438 A1 WO 2009157438A1 JP 2009061397 W JP2009061397 W JP 2009061397W WO 2009157438 A1 WO2009157438 A1 WO 2009157438A1
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- Prior art keywords
- cathode unit
- holder
- magnetic field
- magnet
- recess
- Prior art date
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- 239000000758 substrate Substances 0.000 claims abstract description 35
- 238000004544 sputter deposition Methods 0.000 claims description 48
- 239000013077 target material Substances 0.000 claims description 43
- 230000004308 accommodation Effects 0.000 claims description 14
- 239000010408 film Substances 0.000 description 30
- 239000007789 gas Substances 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- 229910052814 silicon oxide Inorganic materials 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000000059 patterning Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000005477 sputtering target Methods 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- -1 argon ions Chemical class 0.000 description 1
- 238000005513 bias potential Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Images
Classifications
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- 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
-
- 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
- C23C14/35—Sputtering by application of a magnetic field, e.g. magnetron sputtering
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/34—Gas-filled discharge tubes operating with cathodic sputtering
- H01J37/3402—Gas-filled discharge tubes operating with cathodic sputtering using supplementary magnetic fields
- H01J37/3405—Magnetron sputtering
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/34—Gas-filled discharge tubes operating with cathodic sputtering
- H01J37/3411—Constructional aspects of the reactor
- H01J37/3414—Targets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/34—Gas-filled discharge tubes operating with cathodic sputtering
- H01J37/3411—Constructional aspects of the reactor
- H01J37/3414—Targets
- H01J37/3423—Shape
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/34—Gas-filled discharge tubes operating with cathodic sputtering
- H01J37/3411—Constructional aspects of the reactor
- H01J37/3435—Target holders (includes backing plates and endblocks)
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/34—Gas-filled discharge tubes operating with cathodic sputtering
- H01J37/3411—Constructional aspects of the reactor
- H01J37/345—Magnet arrangements in particular for cathodic sputtering apparatus
- H01J37/3452—Magnet distribution
-
- 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 potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table 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
- H01L21/283—Deposition of conductive or insulating materials for electrodes conducting electric current
- H01L21/285—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation
- H01L21/28506—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers
- H01L21/28512—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers on semiconductor bodies comprising elements of Group IV of the Periodic Table
- H01L21/2855—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers on semiconductor bodies comprising elements of Group IV of the Periodic Table by physical means, e.g. sputtering, evaporation
-
- 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
- H01L21/76838—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 conductors
- H01L21/76841—Barrier, adhesion or liner layers
- H01L21/76843—Barrier, adhesion or liner layers formed in openings in a dielectric
-
- 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
- H01L21/76838—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 conductors
- H01L21/76841—Barrier, adhesion or liner layers
- H01L21/76871—Layers specifically deposited to enhance or enable the nucleation of further layers, i.e. seed layers
- H01L21/76873—Layers specifically deposited to enhance or enable the nucleation of further layers, i.e. seed layers for electroplating
Definitions
- the present invention relates to a cathode unit used for forming a film on the surface of a substrate to be processed and a sputtering apparatus provided with the cathode unit.
- a sputtering apparatus is used in a film forming process in the manufacture of a semiconductor device.
- a sputtering apparatus for such a use a high-aspect-ratio fine hole is processed with the recent miniaturization of a wiring pattern.
- film formation over the entire surface of the substrate with good coverage that is, improvement in coverage.
- a magnet assembly in which a plurality of magnets with alternating polarities are provided is arranged behind the target (on the side facing away from the sputtering surface), and the front of the target is formed by this magnet assembly.
- a tunnel-like magnetic field is generated on the (sputtering surface side), and the electrons ionized in front of the target and the secondary electrons generated by sputtering are captured to increase the electron density in front of the target and increase the plasma density. ing.
- the target is preferentially sputtered in the region affected by the magnetic field in the target.
- the region is, for example, in the vicinity of the center of the target from the viewpoint of improving the stability of discharge and the use efficiency of the target, the amount of erosion of the target during sputtering increases near the center.
- target material particles for example, metal particles, hereinafter referred to as “sputtered particles”
- sputtered particles sputtered from the target are incident and attached at an inclined angle on the outer peripheral portion of the substrate.
- Patent Document 1 discloses a sputtering apparatus in which a second sputtering target is disposed obliquely, that is, a device including a plurality of cathode units.
- the present invention has a simple and low-cost cathode unit capable of forming a high-aspect-ratio fine hole on the entire surface of a substrate with good coverage, and a sputtering unit including this cathode unit.
- An object is to provide an apparatus.
- the cathode unit of the present invention includes a holder having at least one recess formed on one side thereof, and a bottomed cylindrical target material is attached to the recess from the bottom side, A magnetic field generating means for generating a magnetic field is assembled in the space inside the target material.
- a sputtering gas such as a rare gas is introduced and a negative predetermined potential is applied to the cathode unit, for example.
- Glow discharge occurs in the space inside the target material from the space in front of the cathode unit, and the magnetic field generated by the magnetic field generating means confines plasma in the space inside the target material (especially secondary electrons generated by sputtering are confined). If the introduction of the sputtering gas is stopped in this state, self-discharge occurs under a low pressure in the space inside the target material.
- Sputtering gas ions in the plasma collide with the inner wall surface of the target material and are sputtered, and the sputtered particles and sputtered particle ions generated by the sputtering have a strong straightness from the opening of the target material and are in front of the cathode unit. Released into the space.
- the film is formed with extremely high film thickness uniformity in the portion facing the opening of the target material and its periphery. That is, what is incident and attached at an angle inclined with respect to the substrate surface is limited.
- the sputtering apparatus of the present invention is used in a film forming process in the manufacture of a semiconductor device, it is possible to form a film with good coverage even for fine holes with a high aspect ratio.
- the recesses are formed over the entire surface of the holder with the same opening diameter and a predetermined interval, and the magnetic field generating means is arranged at the center of the recesses adjacent to each other.
- a rod-shaped magnet arranged along the depth direction of the concave portion on a line connecting the two, and a receiving hole that allows the magnet to be accommodated on a surface facing away from one side of the holder where the concave portion is formed
- the cathode unit may be easily assembled simply by inserting a target material or a magnet into the recess or the accommodation hole of the holder.
- the concave portion is formed with the same opening diameter over the entire surface of the holder with a predetermined interval
- the magnetic field generating means is a ring-shaped magnet surrounding each concave portion
- each of the magnets is attached to an integral support plate, and when the support plate is joined to the other surface of the holder, each magnet is inserted into the accommodation hole or the accommodation groove and arranged around the recess. If so, the assembly of the cathode unit may be further simplified.
- a sputtering apparatus of the present invention includes a cathode unit according to any one of claims 1 to 4, a vacuum chamber in which the cathode unit is disposed, A gas introduction means for introducing a predetermined sputtering gas into the vacuum chamber and a sputtering power source for supplying power to the cathode unit are provided.
- a plurality of cathode units are not provided in the sputtering apparatus itself as in the above prior art, but a single cathode unit can form a film with high film thickness uniformity. Compared with the case where the apparatus configuration is changed for use, the configuration is simple, and the manufacturing cost of the apparatus can be reduced.
- the coil is energized.
- a vertical magnetic field can be generated so that perpendicular magnetic field lines pass at equal intervals over the entire surface of the cathode unit and the substrate.
- the sputtering apparatus 1 includes a vacuum chamber 2 capable of forming a vacuum atmosphere, and a cathode unit C is attached to a ceiling portion of the vacuum chamber 2.
- the ceiling side of the vacuum chamber 2 is referred to as “upper” and the bottom side thereof is referred to as “lower”.
- the cathode unit C includes a disc-shaped holder 3 made of a conductive material, for example, the same material as a target material described later.
- a plurality of circular recesses 4 in plan view are formed on the lower surface of the holder 3 with the same opening area.
- one concave portion 4 is formed concentrically with the center Cp of the holder 3, and six concave portions 4 b are formed around the concave portion 4 on the same virtual circumference Vc at equal intervals. It forms so that it may be located in.
- each concave portion 4 on the virtual circumference Vc further six concave portions 4 including the central concave portion 4 are arranged at equal intervals on the virtual circumference having the same diameter as the above. Form so as to be positioned. In this way, the concave portion 4 is formed on the outer side in the radial direction of the holder 3 until it cannot be formed. Thereby, many recessed parts 4 are formed densely over the entire lower surface of the holder 3.
- each recess 4 is set in a range of ⁇ 20 to 60 mm, and accordingly, the area of the lower surface of the holder 3 is such that the center of the recess 4 located at the outermost radial direction of the holder 3 is larger than the outer periphery of the substrate W. It is sizing so that it is located inside the direction. Further, the interval between the concave portions 4 in the radial direction is set so as to be larger than the diameter of a cylindrical magnet to be described later and the strength of the holder 3 can be maintained. A target material 5 is inserted into each recess 4.
- the target material 5 is made of a material appropriately selected according to the composition of the thin film to be formed on the substrate W to be processed, for example, made of Cu, Ti, or Ta, and has a discharge space 5a inside. It has a bottom cylindrical shape. Then, the target material 5 is detachably fitted to each recess 4 from the bottom side. At this time, the length is set so that the lower surface of the target material 5 is flush with the lower surface of the holder 3. In addition, after the target material 5 is fitted in each recess 4 of the holder 3, a mask plate (not shown) having an opening smaller than the opening area of the target material 5 is attached to the lower surface of the holder 3, and the cathode unit C is attached. Each target material 5 is prevented from being detached from the recess 4 when attached to the ceiling of the vacuum chamber 2. In this case, the mask plate may be made of the same material as the target material 5, for example.
- a plurality of accommodation holes 6 extending in the thickness direction are opened on the upper surface of the holder 3 and a rod-like magnet 7 formed in a columnar shape or a prismatic shape is inserted.
- the accommodation hole 6 is formed so that six magnets 7 are arranged at equal intervals around one recess and on a line connecting the centers of the recesses 4 adjacent to each other. (See FIG. 3).
- the depth from the upper surface of the holder 3 is set so that the magnet 7 is positioned from the bottom of the target material 5 to a depth position of at least about 1/3.
- Each magnet 7 is designed so that a strong magnetic field of 500 gauss or more is generated in the space 5 a inside the target material 5 when arranged around each recess 4, and the polarity of the magnet 7 is set at a predetermined position of the disc-shaped support plate 8.
- the polarity on the support plate 8 side is the N pole.
- the support plate 8 is also formed of a conductive material, and after both are joined, both are fixed using fastening means (not shown) such as bolts.
- a mechanism for circulating the refrigerant in the internal space of the support plate 8 may be provided so as to serve as a backing plate for cooling the holder 3 in which the target material 5 is inserted during sputtering.
- the cathode unit C is electrically connected to a DC power source (sputtering power source) 9 having a known structure so that a predetermined negative potential is applied.
- a stage 10 is disposed at the bottom of the vacuum chamber 2 so as to face the cathode unit C, and a substrate W to be processed such as a silicon wafer can be positioned and held.
- a gas pipe 11 for introducing a sputtering gas such as argon gas is connected to the side wall of the vacuum chamber 2, and the other end communicates with a gas source via a mass flow controller (not shown).
- the vacuum chamber 2 is connected to an exhaust pipe 12a that communicates with a vacuum exhaust means 12 such as a turbo molecular pump or a rotary pump (see FIG. 1).
- a silicon oxide film (insulating film) is formed on the Si wafer surface as the substrate W to be formed, and then this silicon oxide film is formed by a known method.
- a Cu film as a seed film is formed by sputtering using a pattern formed by patterning fine holes for wiring.
- the target material 5 is fitted into each recess 4 on the lower surface of the holder 3, and the support plate 8 on which the magnet 7 is erected is inserted into the holder 3 so that each magnet 7 is inserted into the accommodation hole 6 of the holder 3.
- the cathode unit C is assembled by being joined to the upper surface and fixed using bolts (not shown). Then, the cathode unit C is attached to the ceiling portion of the vacuum chamber 2.
- the vacuum exhaust means 12 is operated to evacuate the vacuum chamber 2 to a predetermined degree of vacuum (for example, 10 ⁇ 5 Pa).
- a predetermined degree of vacuum for example, 10 ⁇ 5 Pa.
- a negative potential of a predetermined value is applied to the cathode unit C from the DC power source 9 while introducing sputters such as argon gas into the vacuum chamber 2 at a predetermined flow rate. (Power on).
- the film is formed with extremely high film thickness uniformity.
- the film is formed with extremely high film thickness uniformity.
- the problem of asymmetry in coverage can be solved by one cathode unit C.
- the configuration is simple, and the manufacturing cost of the apparatus can be reduced.
- the magnet 7 is described as an example using a rod-shaped magnet.
- a strong magnetic field of 500 gauss or more is formed in the space 5a of the target material 5
- the form is as follows. It doesn't matter.
- a ring-shaped magnet 20 may be used, and a space 5 a of the target material 5 may be disposed so as to surround the target material 5.
- an annular housing groove 21 that can accommodate the ring-shaped magnet 20 may be provided on the upper surface of the holder 30.
- two bar-shaped magnets are inserted into the receiving hole 6 in a state where the polarities on the side of the target material 5 are mutually changed by interposing a spacer of a non-magnetic material, and a pair of upper and lower magnets are inserted.
- a magnetic field may be generated in the space 5a of the target material 5 (see FIG. 6).
- the target material 5 is detachably inserted into the holder 3 in consideration of mass productivity and target use efficiency.
- the holder 3 itself plays a role as a target. May be. That is, a configuration may be adopted in which only the concave portion is formed on the lower surface of the holder 3, a magnet is built around the concave portion, and the inner wall surface of the concave portion is sputtered.
- the coil 13 and the power supply apparatus that can energize the coil 13 on the outer wall surface of the vacuum chamber around the reference axis CL that connects the centers of the cathode unit C and the substrate W. 14 (see FIG. 1), a vertical magnetic field is generated so that vertical magnetic lines of force pass from the cathode unit C to the entire surface of the substrate W at equal intervals, and film formation may be performed in this state.
- the direction of the sputtered particles from the target material 5 is changed by the vertical magnetic field, and is incident on and adhered to the substrate W substantially perpendicularly.
- the sputtering apparatus of the present invention is used in a film forming process in the manufacture of a semiconductor device, even a fine hole with a high aspect ratio can be formed over the entire surface of the substrate with better coverage.
- a high frequency power source (not shown) having a known structure is electrically connected to the stage so that a predetermined bias potential can be applied to the stage 10 and eventually the substrate W during sputtering, and a Cu seed layer is formed.
- a predetermined bias potential can be applied to the stage 10 and eventually the substrate W during sputtering, and a Cu seed layer is formed.
- Cu ions may be actively attracted to the substrate to increase the sputtering rate.
- Example 1 a Cu film was formed using the sputtering apparatus shown in FIG. A substrate W formed by forming a silicon oxide film over the entire surface of a ⁇ 300 mm Si wafer, and then patterning fine holes (width 40 nm, depth 140 nm) in the silicon oxide film by a known method was used.
- the cathode unit As the cathode unit, as shown in FIG. 6, a Cu holder having a composition ratio of 99% and a diameter of 200 mm was used. And the recessed part of opening diameter (phi) 40mm and depth 50mm was formed in the lower surface center, and it was made to also serve as a target material. Further, around the recess, six magnet units were incorporated at equal intervals in the circumferential direction to obtain a cathode unit C1 for Example 1. In this case, the magnet unit changes the polarities of the two magnets on the target material 5 side (the lower magnet is the N pole and the upper magnet is the S pole), and over the substantially entire length in the depth direction of the recess.
- the magnet unit changes the polarities of the two magnets on the target material 5 side (the lower magnet is the N pole and the upper magnet is the S pole), and over the substantially entire length in the depth direction of the recess.
- the magnets are provided so as to overlap each other so that a magnet exists, and a magnetic field is generated with a magnetic field intensity of 500 gauss in the space of the recess. And after attaching the cathode unit C1 produced in this way to the ceiling part of the vacuum chamber 2, the mask lower surface except the opening of the recessed part was mounted
- the distance between the bottom surface of the holder and the substrate was set to 300 mm
- the power applied to the target was set to 8 KW (current 17.5 A)
- the sputtering time was set to 60 seconds
- the Cu film was formed.
- Membrane was performed.
- FIG. 6 also shows the distribution of the sputtering rate in the radial direction of the substrate when the film is formed under the above conditions. According to this, the same sputtering rate (0.97 nm / s at the center of the substrate, 0.90 and 0.86 nm / s at the position of 75 mm from the center of the substrate) from the center of the substrate to the half of the radial direction is obtained. Thus, it can be seen that the uniformity of the film thickness distribution is extremely high immediately below and around the opening of the holder 3. In addition, when the coverage of the fine holes was confirmed by SEM photography, it was confirmed that a dense thin film was formed on the wall surface of the fine holes to eliminate the problem of asymmetry and improve the in-plane uniformity at the above position. did it.
- FIG. 1 The typical sectional view of the sputtering device provided with the cathode unit of an embodiment of the invention.
- (A) And (b) is sectional drawing explaining the cathode unit which concerns on a modification. Sectional drawing explaining the cathode unit used in Example 1.
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Abstract
Description
2 真空チャンバ
C、C1 カソードユニット
4 凹部
5 ターゲット材
5a 放電用の空間
6 収容孔
7 磁石(磁場発生手段)
9 DC電源
11 ガス管(ガス導入手段)
12 真空排気手段
W 基板
Claims (6)
- 片面に少なくとも1個の凹部が形成されたホルダを備え、前記凹部に、有底筒状のターゲット材がその底部側から装着されると共に、前記ターゲット材内部の空間に磁場を発生させる磁場発生手段を組み付けて構成したことを特徴とするカソードユニット。
- 前記凹部は、前記ホルダの全面に亘って同一の開口径で所定の間隔を存して形成したものであり、前記磁場発生手段が、相互に隣接する各凹部の中心を結ぶ線上で当該凹部の深さ方向に沿って配置される棒状の磁石であり、
前記ホルダのうち前記凹部が形成された片面と背向する面に、前記磁石の収容を可能とする収容孔が開設されていることを特徴とする請求項1記載のカソードユニット。 - 前記凹部は、前記ホルダの全面に亘って同一の開口径で所定の間隔を存して形成したものであり、前記磁場発生手段が各凹部を囲繞するリング状の磁石であり、
前記ホルダのうち前記凹部が形成された片面と背向する他面に、前記磁石の収容を可能とする環状の収容溝が開設されていることを特徴とする請求項1記載のカソードユニット。 - 前記磁石のそれぞれが一体の支持板に取付けられ、当該支持板をホルダの他面と接合すると、前記収容孔または収容溝に各磁石が挿設され、前記凹部の周囲に配置されることを特徴とする請求項2または請求項3記載のカソードユニット。
- 請求項1乃至請求項4のいずれか1項に記載のカソードユニットと、前記カソードユニットが内部に配置される真空チャンバと、前記真空チャンバ内に所定のスパッタガスを導入するガス導入手段と、前記カソードユニットに電力投入するスパッタ電源とを備えたことを特徴とするスパッタリング装置。
- 前記カソードユニットと基板とを結ぶ基準軸の回りで真空チャンバの壁面に設けたコイルと、各コイルへの通電を可能とする電源装置とを更に備えることを特徴とする請求項5記載のスパッタリング装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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US12/991,777 US8470145B2 (en) | 2008-06-26 | 2009-06-23 | Cathode unit and sputtering apparatus provided with the same |
DE112009001533T DE112009001533T5 (de) | 2008-06-26 | 2009-06-23 | Katodeneinheit und mit derselben versehene Sputter-Vorrichtung |
JP2010518017A JP5717444B2 (ja) | 2008-06-26 | 2009-06-23 | カソードユニット及びこのカソードユニットを備えたスパッタリング装置 |
CN2009801238993A CN102066604A (zh) | 2008-06-26 | 2009-06-23 | 阴极单元及具有该阴极单元的溅射装置 |
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JP2008-167175 | 2008-06-26 | ||
JP2008167175 | 2008-06-26 |
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US (1) | US8470145B2 (ja) |
JP (2) | JP5717444B2 (ja) |
KR (1) | KR101560384B1 (ja) |
CN (1) | CN102066604A (ja) |
DE (1) | DE112009001533T5 (ja) |
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WO (1) | WO2009157438A1 (ja) |
Cited By (2)
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JP2013001965A (ja) * | 2011-06-16 | 2013-01-07 | Ulvac Japan Ltd | スパッタリング方法 |
US8834685B2 (en) | 2008-12-15 | 2014-09-16 | Ulvac, Inc. | Sputtering apparatus and sputtering method |
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CN102884222B (zh) * | 2010-06-28 | 2014-09-10 | 日本爱发科泰克能株式会社 | 靶安装机构 |
US9347129B2 (en) * | 2011-12-09 | 2016-05-24 | Seagate Technology Llc | Interchangeable magnet pack |
US10573500B2 (en) | 2011-12-09 | 2020-02-25 | Seagate Technology Llc | Interchangeable magnet pack |
CN108018534B (zh) * | 2017-12-12 | 2020-12-11 | 中国电子科技集团公司第四十八研究所 | 一种用于装夹靶材的磁控溅射镀膜装夹装置 |
CN108396295B (zh) * | 2018-02-26 | 2023-06-27 | 温州职业技术学院 | 曲面磁控溅射阴极、闭合磁场涂层磁控溅射设备及其应用方法 |
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- 2009-06-23 DE DE112009001533T patent/DE112009001533T5/de not_active Withdrawn
- 2009-06-23 US US12/991,777 patent/US8470145B2/en active Active
- 2009-06-23 KR KR1020117000340A patent/KR101560384B1/ko active IP Right Grant
- 2009-06-23 CN CN2009801238993A patent/CN102066604A/zh active Pending
- 2009-06-23 WO PCT/JP2009/061397 patent/WO2009157438A1/ja active Application Filing
- 2009-06-23 JP JP2010518017A patent/JP5717444B2/ja active Active
- 2009-06-25 TW TW098121398A patent/TWI465598B/zh active
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2014
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Also Published As
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JPWO2009157438A1 (ja) | 2011-12-15 |
KR20110039238A (ko) | 2011-04-15 |
TW201009102A (en) | 2010-03-01 |
US8470145B2 (en) | 2013-06-25 |
JP5717444B2 (ja) | 2015-05-13 |
DE112009001533T5 (de) | 2011-04-28 |
US20110056829A1 (en) | 2011-03-10 |
KR101560384B1 (ko) | 2015-10-14 |
JP2015078440A (ja) | 2015-04-23 |
TWI465598B (zh) | 2014-12-21 |
CN102066604A (zh) | 2011-05-18 |
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