WO2016171451A1 - 기판 처리 장치 - Google Patents
기판 처리 장치 Download PDFInfo
- Publication number
- WO2016171451A1 WO2016171451A1 PCT/KR2016/004074 KR2016004074W WO2016171451A1 WO 2016171451 A1 WO2016171451 A1 WO 2016171451A1 KR 2016004074 W KR2016004074 W KR 2016004074W WO 2016171451 A1 WO2016171451 A1 WO 2016171451A1
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- WO
- WIPO (PCT)
- Prior art keywords
- diffusion plate
- substrate
- process gas
- plasma
- chamber
- Prior art date
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- 239000000758 substrate Substances 0.000 title claims abstract description 172
- 238000012545 processing Methods 0.000 title claims abstract description 47
- 238000009792 diffusion process Methods 0.000 claims abstract description 136
- 238000000034 method Methods 0.000 claims abstract description 78
- 238000009826 distribution Methods 0.000 claims abstract description 72
- 238000002347 injection Methods 0.000 claims abstract description 13
- 239000007924 injection Substances 0.000 claims abstract description 13
- 230000000903 blocking effect Effects 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 80
- 238000005530 etching Methods 0.000 description 19
- 150000002500 ions Chemical class 0.000 description 12
- 230000007935 neutral effect Effects 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 11
- 230000006698 induction Effects 0.000 description 10
- 238000000151 deposition Methods 0.000 description 9
- 230000008021 deposition Effects 0.000 description 8
- 239000010408 film Substances 0.000 description 7
- 238000009827 uniform distribution Methods 0.000 description 7
- 239000012495 reaction gas Substances 0.000 description 5
- 238000000427 thin-film deposition Methods 0.000 description 5
- 239000006227 byproduct Substances 0.000 description 4
- 238000005468 ion implantation Methods 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- 230000002411 adverse Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
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- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
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- 239000011521 glass Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- QKCGXXHCELUCKW-UHFFFAOYSA-N n-[4-[4-(dinaphthalen-2-ylamino)phenyl]phenyl]-n-naphthalen-2-ylnaphthalen-2-amine Chemical compound C1=CC=CC2=CC(N(C=3C=CC(=CC=3)C=3C=CC(=CC=3)N(C=3C=C4C=CC=CC4=CC=3)C=3C=C4C=CC=CC4=CC=3)C3=CC4=CC=CC=C4C=C3)=CC=C21 QKCGXXHCELUCKW-UHFFFAOYSA-N 0.000 description 1
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- 229920000642 polymer Polymers 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
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- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
- H01J37/32431—Constructional details of the reactor
- H01J37/32623—Mechanical discharge control means
- H01J37/32633—Baffles
-
- 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
- H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
- H01J37/32357—Generation remote from the workpiece, e.g. down-stream
-
- 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
- H01J37/32431—Constructional details of the reactor
- H01J37/3244—Gas supply means
-
- 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
- H01J37/32431—Constructional details of the reactor
- H01J37/3244—Gas supply means
- H01J37/32449—Gas control, e.g. control of the gas flow
-
- 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
- H01J37/32431—Constructional details of the reactor
- H01J37/32623—Mechanical discharge control means
-
- 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
- H01J37/32431—Constructional details of the reactor
- H01J37/32798—Further details of plasma apparatus not provided for in groups H01J37/3244 - H01J37/32788; special provisions for cleaning or maintenance of the apparatus
- H01J37/32816—Pressure
- H01J37/32834—Exhausting
-
- 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
- H01L21/30—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
- H01L21/3065—Plasma etching; Reactive-ion 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
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
Definitions
- the present invention relates to a substrate processing apparatus, and more particularly, to a substrate processing apparatus capable of improving the uniformity of substrate processing.
- a substrate processing apparatus is a device that performs substrate processing such as etching or depositing a substrate using a physical or chemical reaction such as a plasma phenomenon in a vacuum state.
- a reaction gas is injected through a shower head installed in a chamber to perform substrate processing.
- the injected reaction gas forms a plasma in the chamber by application of power, and is processed by a plasma state material such as radicals formed in the chamber to be etched or deposited on the surface of the substrate in accordance with the purpose of processing the substrate. Is performed.
- the substrate and the circuit elements formed on the substrate are damaged due to arc generation, collision of ions, and ion implantation in the chamber, resulting in poor process. There is a problem that can cause.
- the reaction gas plasma cannot be uniformly moved and distributed only by the shower head for distributing the reaction gas, so that the reaction gas plasma is not uniformly distributed throughout the substrate, and is deposited on the substrate by being biased in one place.
- the film to be made cannot have a uniform thickness.
- Patent Document 1 Korean Registered Patent No. 10-0880767
- the present invention provides a substrate processing apparatus capable of improving the uniformity of substrate processing by uniformly distributing plasma throughout the substrate.
- a substrate processing apparatus includes a chamber for providing a substrate processing space; A process gas supply line for supplying a process gas to the chamber; A first diffusion plate having an injection hole in which an edge of the process gas is injected; A substrate support positioned opposite the first diffusion plate and supporting the substrate; A second diffusion plate provided between the first diffusion plate and the substrate support and having a plurality of distribution holes; And a plasma generator configured to form a plasma in a space between the first diffusion plate and the second diffusion plate.
- It may further include a side wall member connected to the edge of the second diffusion plate, the plurality of gas induction hole is formed.
- the second diffusion plate may have an effective area density of the distribution holes that are different for each location.
- an effective area density of the distribution hole may be greater than that of an edge of a center portion of the second diffusion plate.
- It may further include an insert inserted into the distribution hole to adjust the open area of the second diffusion plate.
- the insert may include a through hole through which the center part passes.
- the second diffusion plate may be formed of a plurality of multi-stage structures, and the distribution holes of each stage may have different positions between adjacent stages.
- the apparatus may further include a position adjusting unit configured to adjust a distance between the first diffusion plate and the second diffusion plate.
- the apparatus may further include a plurality of exhaust ports disposed in a symmetrical manner along the circumference of the substrate support adjacent to the inner wall of the chamber.
- It may further include a blocking ring extending from the edge of the substrate support along the periphery of the substrate support.
- a substrate processing apparatus may achieve a uniform distribution of plasma using a first diffusion plate for distributing process gas and a second diffusion plate for distributing plasma. Accordingly, substrate processing such as etching and deposition can be uniformly performed on the entire substrate.
- the substrate when the plasma is formed, the substrate may not be directly exposed to the plasma through the second diffusion plate, thereby causing damage to the substrate and the circuit elements formed on the substrate due to arc generation, collision of ions, and ion implantation in the chamber. It can solve the problem that caused it. Accordingly, process defects of the substrate and the circuit elements formed on the substrate may be minimized.
- grounding the second diffusion plate and filtering the charged ions and electrons in the plasma only neutral reactive species can be introduced onto the substrate, thereby minimizing the adverse effects of the charged ions and electrons on the substrate and around the substrate. have.
- the effective area density of the distribution hole can be easily adjusted by using an insert inserted into the distribution hole of the second diffusion plate. Because of this, even if the process conditions are different, it is possible to achieve a uniform distribution of the neutral reactive species (or plasma).
- the second diffusion plate may be formed in a multi-stage structure to control the flow of neutral reactive species (or plasma).
- FIG. 1 is a cross-sectional view showing a substrate processing apparatus according to an embodiment of the present invention.
- FIG. 2 is a plan view of a second diffusion plate according to an embodiment of the present invention.
- FIG 3 is a perspective view of a side wall member according to an embodiment of the present invention.
- Figure 4 is a perspective view of the second diffusion plate and the side wall member in accordance with an embodiment of the present invention.
- FIG 5 is a plan view of a second diffuser plate having a large distribution hole according to an embodiment of the present invention.
- FIG. 6 is a plan view of a second diffuser plate having a small distribution hole according to an embodiment of the present invention.
- FIG. 7 is a plan view of a second diffusion plate in which a large distribution hole in the center portion and a small distribution hole in the edge portion are formed according to an embodiment of the present invention.
- FIG 8 is a view showing an insert inserted into the distribution hole of the second diffusion plate according to an embodiment of the present invention.
- Figure 9 is a cross-sectional view showing a second stage diffusion plate different in the position of the distribution hole according to an embodiment of the present invention.
- FIG. 10 is a cross-sectional view showing a second stage diffusion plate of the multi-stage different position and size of the distribution hole according to an embodiment of the present invention.
- FIG. 1 is a cross-sectional view illustrating a substrate processing apparatus according to an embodiment of the present invention.
- a substrate processing apparatus includes a chamber 110 that provides a substrate processing space; A process gas supply line 120 supplying a process gas to the chamber 110; A first diffusion plate 130 having an injection hole 131 through which an edge of the process gas is injected; A substrate support 140 positioned opposite to the first diffusion plate 130 and supporting the substrate 10; A second diffuser plate 150 provided between the first diffuser plate 130 and the substrate support 140 and having a plurality of distribution holes 151 therein; And a plasma generator 160 forming a plasma 164 in a space between the first diffusion plate 130 and the second diffusion plate 150.
- the chamber 110 may provide a space in which substrate processing is performed, may allow a vacuum to be formed in the chamber 110, and may form a plasma inside the chamber 110 for effective substrate processing.
- the chamber 110 may include an exhaust means 210 for exhausting a gas.
- the exhaust means 210 may be formed under the chamber 110.
- the chamber 110 may be made of various materials including metals, ceramics, glass, polymers, and composites, and the shape of the chamber 110 may include a right angle, a dome shape, a cylindrical shape, and the like.
- the process gas supply line 120 supplies the process gas from the process gas supply source (not shown) to the chamber 110.
- the process gas may include an etching gas and a source gas for thin film deposition.
- the process gas supply line 120 may supply the etching gas during the etching process, and supply the source gas for thin film deposition during the thin film deposition process, and may supply a suitable process gas according to the purpose of substrate processing.
- the etching gas may include a natural oxide film etching gas such as nitrogen trifluoride (NF 3 ), ammonia (NH 3 ), and the source gas for thin film deposition is monosilane (SiH 4 ), phosphine (PH 3 ), or the like.
- It may include a silicon deposition gas of, may be appropriately selected according to the type of deposition thin film.
- an inert gas such as hydrogen (H 2 ), nitrogen (N 2 ), argon (Ar), or the like may be supplied to the process gas together with the etching gas or the source gas for thin film deposition.
- the first diffusion plate 130 distributes the process gas, and an injection hole 131 through which the process gas is injected may be formed at an edge portion thereof. Since the process gas is distributed and injected through the first diffusion plate 130, the process gas may uniformly reach the substrate 10.
- Process gas supply line 120 may be located in the center of the chamber 110 for uniform distribution of the process gas. In this case, when the injection hole 131 is located in the center portion, the process gas is injected more than other portions in the center portion communicating with the process gas supply line 120 to reach the substrate 10 at the position. Therefore, it becomes nonuniform and the process of the substrate by the said process gas also becomes nonuniform depending on a position.
- the process gas is bypassed and uniformly distributed to the edges without being in communication with the process gas supply line 120, so that the substrate ( 10) The process gas can reach uniformly.
- the precise position, the injection direction, the number of injection holes 131 may be appropriately determined to create a uniform flow of the process gas in the chamber 110 according to the process conditions.
- the substrate support 140 is positioned to face the first diffusion plate 130 and supports the substrate 10.
- the substrate support 140 may be disposed below the inner side of the chamber 110 to support the substrate 10, the substrate 10 is supported on the substrate support 140, and the substrate 10 is electrostatically And a chargeable electrostatic chuck or the like to be maintained.
- the second diffuser plate 150 may be provided between the first diffuser plate 130 and the substrate support 140, and a plurality of distribution holes 151 may be formed. Even using only the first diffusion plate 130 may create a uniform flow of the process gas in the chamber 110. However, when only the first diffusion plate 130 is used, the flow of the process gas (or plasma) is directed to the exhaust direction by the exhaust means 210 due to the distance between the first diffusion plate 130 and the substrate 10. It cannot be biased to achieve a uniform distribution of the process gas (or plasma) on the substrate 10. However, when the second diffusion plate 150 is used together, the flow of the process gas (or plasma) may be controlled to achieve a uniform distribution of the process gas (or plasma) on the substrate 10.
- the second diffusion plate 150 may be grounded or applied with a voltage to filter ions and electrons charged in the plasma. That is, when the plasma passes through the second diffusion plate 150, ions and electrons may be blocked so that only neutral reactive species react on the substrate 10. The second diffuser plate 150 may cause the plasma to strike the second diffuser plate 150 at least once and then reach the substrate 10. In addition, when the plasma strikes the second diffusion plate 150 which is grounded (or applied with a different polarity), ions and electrons having high energy may be absorbed by the second diffusion plate 150. Accordingly, adverse effects of charged ions and electrons on the substrate 10 and around the substrate 10 can be minimized.
- the peripheral parts inside the chamber 110 may be used.
- the surface of 10) may not be damaged.
- the second diffuser plate 150 may also block the light of the plasma, the light of the plasma may be impinged on the second diffuser plate 150 to prevent transmission.
- the second diffusion plate 150 may be grounded through contact with the chamber 110 without applying a secondary electrode.
- the second diffusion plate 150 may prevent the substrate 10 from being directly exposed to the plasma when the plasma is formed, and thus, the substrate 10 may be formed by arc generation, collision of ions, ion implantation, etc. in the chamber 110. 10) and the problem that caused damage to the circuit elements formed on the substrate 10 may be solved. Accordingly, process defects of the substrate 10 and the circuit elements formed on the substrate 10 according to the substrate processing process may be minimized.
- the plasma generator 160 may form the plasma 164 in a space between the first diffusion plate 130 and the second diffusion plate 150.
- the plasma generator 160 excites the process gas to form the plasma 164, and may include an discharge tube 162 and an antenna 161 or an inductive coupling coil provided to surround the discharge tube 162.
- the discharge tube 162 may be made of sapphire, quartz, ceramic, or the like, and may be formed in a predetermined dome (or tube) shape.
- the discharge tube 162 may be provided above the inside of the chamber 110, and an upper side thereof may be connected to the process gas supply line 120, and a lower side thereof may form a space for forming the second diffusion plate 150 and the plasma 164. That is, a space between the first diffusion plate and the second diffusion plate can be provided.
- the process gas may be distributed to a space between the upper side of the discharge tube 162 and the first diffusion plate 130, and the process gas may be injected through the injection hole 131 of the first diffusion plate 130.
- the antenna 161 may be provided to surround the discharge tube 162 in the chamber 110, and receive power from the power supply unit 163 to excite the process gas in the discharge tube 162 to form the plasma 164. can do.
- the power may be applied to the provided electrode to form a plasma.
- the substrate processing apparatus bypasses the process gas supply line 120 positioned in the center of the chamber 110 through the first diffusion plate 130 so that the process gas is uniformly injected through the injection hole 131. Can be.
- the process gas may be widely spread in a space between the first diffusion plate 130 and the second diffusion plate 150, and only the neutral reactive species is disposed through the distribution holes 151 of the second diffusion plate 150. It can flow into (10) uniformly.
- the substrate processing apparatus according to the present invention may uniformly perform substrate processing on the entire substrate 10.
- Each of the first diffusion plate 130 and the second diffusion plate 150 affects the flow of gas (eg, process gas, plasma, reactive species, etc.), and as a result, the neutral reactive paper is disposed on the substrate 10. It can be distributed uniformly.
- FIG. 2 is a plan view of a second diffusion plate according to an embodiment of the present invention
- FIG. 3 is a perspective view of a side wall member according to an embodiment of the present invention
- FIG. 4 is a second diffusion plate according to an embodiment of the present invention. A perspective view of the plate and the side wall member.
- the substrate processing apparatus of the present invention may further include a sidewall member 170 connected to an edge of the second diffusion plate 150 and having a plurality of gas induction holes 171 formed therein.
- the sidewall member 170 may be coupled to the second diffusion plate 150, and may provide a space for the neutral reactive species passing through the second diffusion plate 150 to react on the substrate 10. Without the side wall member 170, the reactive species is exhausted on the substrate 10 due to the exhaust by the exhaust means 210. However, if the side wall member 170 is included, it is possible to control the flow of the reactive species, thereby allowing the reactive species to sufficiently react on the substrate 10.
- a plurality of gas induction holes 171 are formed in the side wall member 170.
- the flow of the gas due to the suction (or pumping) of the exhaust means 210 can be adjusted according to the size, position and number of the gas induction hole 171, thereby controlling the flow of the reactive species. Accordingly, the flow of gas may be controlled in the formation space of the plasma 164.
- gaseous processes eg, etching or deposition
- by-products may be exhausted into the gas induction hole 171 by suction (or pumping) of the exhaust means 210.
- the movement speed and the exhaust speed of the reaction species may be adjusted according to the size, position and number of the gas induction hole 171.
- the reactive species reacts on the substrate 10 through the distribution holes 151 of the second diffusion plate 150, and reaches the substrate 10 through the gas induction hole 171 of the sidewall member 170.
- the flow of the reactive species can be controlled. Accordingly, the moving speed of the reactive species may be adjusted, and the reactive species may be provided on the substrate 10 to sufficiently react on the substrate 10.
- the second diffusion plate 150 and the side wall member 170 may be formed integrally.
- FIG. 5 is a plan view of a second diffuser plate having a large distribution hole according to an embodiment of the present invention
- FIG. 6 is a plan view of a second diffuser plate having a small distribution hole according to an embodiment of the present invention
- FIG. 7. Is a plan view of a second diffusion plate in which a large distribution hole in a center portion and a small distribution hole in an edge portion are formed according to an embodiment of the present invention. 5 to 7 show a modification of the second diffusion plate according to an embodiment of the present invention.
- the second diffusion plate 150 may have effective area densities of distribution holes 151 that are different for each location.
- the effective area density represents the total area of the distribution holes 151 per unit area, that is, the open area per unit area of the second diffusion plate 150 (that is, the open area by the distribution holes).
- a large distribution hole 151a may be formed in the second diffusion plate 150 as shown in FIG. 5. If the distribution hole 151a is too large, the flow of the reactive species is directed to the exhaust direction by the exhaust means 210. It may be biased so that the reactive species may not be uniformly distributed on the substrate 10.
- a small distribution hole 151b may be formed in the second diffusion plate 150 as shown in FIG. 6.
- the movement speed of the reactive species may be slowed, which may take a long time. Can be.
- the exhaust means 210 provided at the position and the edge of the injection hole 131 of the first diffusion plate 130 formed at the edge. Due to the exhaust direction by the reaction species on the substrate 10 may be supplied to the edge portion of the substrate 10 more than the center portion of the substrate 10 may not be uniformly distributed. However, the reaction species may be uniformly distributed on the substrate 10 by changing the size of the distribution hole 151 or the density of the distribution hole 151 for each position.
- the second diffusion plate 150 may have an effective area density of the distribution holes 151 that are different for each location by varying the size of the distribution holes 151 for each location or by varying the density of the distribution holes 151.
- the distribution hole 151 located at the center of the second diffusion plate 150 may be larger than the distribution hole 151 located at the edge portion, or the size of the distribution hole 151 may be gradually increased depending on the distance from the center. You can change it.
- the effective area density of the distribution hole 151 may be greater than that of the edge portion of the second diffusion plate 150.
- the distribution hole 151a in the center portion may be larger than the distribution hole 151b in the edge portion, and the effective area density of the distribution hole 151 may be larger than the edge portion in the center portion.
- the reactive species introduced into the center portion of the second diffusion plate 150 may be increased to uniformly distribute the reactive species on the substrate 10.
- the injection hole 131 of the first diffusion plate 130 is located at the edge portion and the exhaust direction by the exhaust means 210 is also the edge direction, the flow of gas is biased to the edge.
- the amount of the reactive species reaching the substrate 10 is small in the central portion of the second diffusion plate 150 so that the reaction does not occur in the central portion of the substrate 10.
- the effective area density of the distribution hole 151a formed in the center portion of the second diffusion plate 150 is greater than the effective area density of the distribution hole 151b formed in the edge portion of the second diffusion plate 150, 2 may increase the flow rate of the reactive species flowing into the central portion of the diffusion plate 150. Accordingly, the reactive species may be uniformly distributed on the substrate 10.
- FIG. 8 is a diagram illustrating an insert inserted into a distribution hole of a second diffusion plate according to an embodiment of the present invention.
- the substrate processing apparatus of the present invention may further include an insert 220 inserted into the distribution hole 151 to adjust the open area of the second diffusion plate 150.
- the insert 220 may be formed in a plug shape, and the insert 220a may be inserted into the distribution hole 151 to block the insert.
- the arrangement structure of the distribution holes 151 may be easily changed only by inserting the insert 220a without having to re-form the second diffusion plate 150 to change the arrangement structure of the distribution holes 151. It is possible to have an effective area density of the distribution holes 151 different for each position. Accordingly, the insertion of the insert 220a can easily adjust the flow of the reactive species.
- the insert 220b may include a through hole 221 through which a central portion thereof passes.
- the size of the distribution hole 151 may be adjusted and the flow of the fine reactive species may be adjusted. Accordingly, the reaction species is more uniform on the substrate 10 by adjusting the size of the distribution hole 151 through the insertion of the insert 220b with a minute difference according to the process conditions such as the conditions of the chamber 110 and the pumping speed. Can be distributed.
- the through hole 221 may be formed in various sizes, and through the through holes 221 of various sizes, a finer flow of the reactive species may be controlled.
- the inserted insert 220a and the insert 220b having the through hole 221 formed therein may be used together, and in this case, the flow of the reactive species may be more precisely controlled.
- FIG. 9 is a cross-sectional view illustrating a second diffusion plate having a multistage different position of a distribution hole according to an embodiment of the present invention
- FIG. 10 is a second multistage of all different positions and sizes of a distribution hole according to an embodiment of the present invention. It is sectional drawing which showed the diffuser plate.
- 9 to 10 are conceptual views for explaining the multi-stage structure of the second diffusion plate according to an embodiment of the present invention.
- the second diffusion plate 150 may be formed in a plurality of multi-stage structures, and the distribution holes 151 of each stage may have different positions between adjacent stages.
- the distribution holes 151 adjacent to each other may have different positions only as illustrated in FIG. 9, and both positions and sizes may be different from each other as illustrated in FIG. 10.
- the plurality of second diffusion plates 150 may control the flow of the reactive species, and the amount of the reactive species that reaches the position of the substrate 10 and the moving (or inflow) speed of the reactive species are reached. I can regulate it.
- the inflow rate of the reaction species is faster and the time that the reaction species can react on the substrate 10 is also shortened distribution holes 151
- the difference in uniformity of substrate processing occurs at the formed position and the position where the distribution hole 151 is not formed. Accordingly, when the second diffusion plate 150 is formed in a plurality of multistage structures, even when the distance between the second diffusion plate 150 and the substrate 10 is close, a bottleneck is caused in the flow of the reactive species, thereby introducing the reactive species. By lowering the speed and efficiently distributing the reactive species, the reactive species may be uniformly distributed on the substrate 10.
- the substrate processing apparatus of the present invention may further include a position adjusting unit (not shown) for adjusting a distance between the first diffusion plate 130 and the second diffusion plate 150.
- the position adjusting unit may adjust a position of the second diffuser plate 150 to adjust a distance between the first diffuser plate 130 and the second diffuser plate 150. If the distance between the first diffusion plate 130 and the second diffusion plate 150 is adjusted, the space for forming the plasma 164 may be adjusted, and sufficient space may be provided to allow the process gas to be widely spread. In addition, the plasma 164 at the interval between the first diffusion plate 130 and the second diffusion plate 150 in which the process gas is uniformly distributed in the space between the first diffusion plate 130 and the second diffusion plate 150. ) Can be formed.
- the distance between the substrate 10 and the second diffusion plate 150 may be adjusted by adjusting the position of the second diffusion plate 150.
- the first diffusion plate 130 may be adjusted according to the position of the second diffusion plate 150.
- the gap between the second diffusion plate 150 is also adjusted.
- substrate processing such as etching may be more uniform, and substrate throughput (eg, etching rate) may be increased.
- the selectivity eg, the etching ratio between the natural oxide film and the nitride film
- the selectivity eg, the etching ratio between the natural oxide film and the nitride film
- the second diffusion plate 150 may be formed in a multi-stage structure to bottleneck the flow of the reactive species, thereby obtaining a more uniform substrate treatment such as etching and deposition.
- the film color is caused by inconsistent etching due to uneven surface of the substrate 10 or uneven thickness of the deposited thin film.
- the diameter of the distribution hole 151 is smaller than 10 mm, the flow of the reactive species is reduced. It becomes uniform and can prevent the said film color.
- the substrate processing apparatus of the present invention may be positioned to be symmetrical along the circumference of the substrate support 140 adjacent to the inner wall of the chamber 110, and may further include a plurality of exhaust ports 180 formed in multiple stages.
- the exhaust port 180 may be formed in multiple stages, and the exhaust port plate 181 in which the plurality of exhaust ports 180 are formed to be symmetric along the circumference of the substrate support 140 may be configured in multiple stages.
- the exhaust port 180 may maintain the degree of vacuum in the chamber 110 while controlling the flow of the reactive species uniformly throughout the substrate 10, and may allow the process byproduct to be exhausted.
- the exhaust port plate 181 may be formed in an annular plate shape 181a, or may be bent on an annular plate to include sidewalls.
- the length of the sidewall may be short (181b) or long (181c).
- the side wall may induce an exhaust flow, which prevents the exhaust gas exhausted to the exhaust port 180 from leaking to another place and induces the exhaust flow so that the exhaust gas can be well exhausted to the exhaust means 210.
- the uppermost exhaust port plate 181a may be connected to the sidewall member 170, and the exhaust port plate 181a and the sidewall member 170 are connected to each other to exhaust the exhaust gas to the gas induction hole 171.
- the exhaust port 180 may be well exhausted without leaking out.
- the substrate processing apparatus of the present invention may further include a blocking ring 190 extending from an edge of the substrate support 140 along the circumference of the substrate support 140.
- the blocking ring 190 may guide the substrate 10 so that the substrate 10 can be stably supported by the substrate support 140 when the substrate 10 moves.
- the blocking ring 190 reduces the gap between the substrate support 140 and the side wall member 170 to minimize the reaction species do not react on the substrate 10 due to the exhaust by the exhaust means 210 is exhausted Can be. That is, the reaction species react on the substrate 10 by passing through the distribution holes 151 of the second diffusion plate 150, and exhaust the exhaust species to the exhaust port 180 through the gas induction hole 171 of the sidewall member 170.
- the flow of the reactive species can be controlled.
- the exhaust gas exhausted to the exhaust port 180a may be minimized to leak to other places, and the exhaust flow may be induced to be well exhausted to the exhaust means 210.
- the first diffusion plate 130 and the second diffusion plate 150 each influence the flow of gas (for example, process gas, plasma, reactive species, etc.), resulting in neutral
- the reactive species may be uniformly distributed on the substrate 10.
- more precise substrate processing may be performed through the sidewall member 170, the exhaust port 180, and the like.
- the substrate processing apparatus of the present invention may perform substrate processing such as etching and deposition on the entire substrate 10 by adjusting the gas flow to various components, and more uniformly by changing the structure of the components.
- One substrate treatment can be performed.
- the substrate processing apparatus may achieve a uniform distribution of the plasma by using the first diffusion plate for distributing the process gas and the second diffusion plate for distributing the plasma. Accordingly, substrate processing such as etching and deposition can be uniformly performed on the entire substrate.
- substrate processing such as etching and deposition can be uniformly performed on the entire substrate.
- the substrate may not be directly exposed to the plasma through the second diffusion plate, thereby causing damage to the substrate and the circuit elements formed on the substrate due to arc generation, collision of ions, and ion implantation in the chamber. It can solve the problem that caused it. Accordingly, process defects of the substrate and the circuit elements formed on the substrate may be minimized.
- the second diffusion plate By grounding the second diffusion plate and filtering the charged ions and electrons in the plasma, only neutral reactive species can be introduced onto the substrate, thereby minimizing the adverse effects of the charged ions and electrons on the substrate and around the substrate. have. In addition, it is possible to prevent the substrate and the surroundings of the substrate from being damaged by the plasma. Meanwhile, the effective area density of the distribution hole can be easily adjusted by using an insert inserted into the distribution hole of the second diffusion plate. This makes it possible to achieve a uniform distribution of neutral reactive species simply even if the process conditions are different.
- the second diffusion plate may be formed in a multistage structure to control the flow of the neutral reactive species.
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Abstract
Description
Claims (10)
- 기판 처리 공간을 제공하는 챔버;상기 챔버로 공정가스를 공급하는 공정가스 공급라인;가장자리부에 상기 공정가스가 분사되는 분사홀이 형성된 제1 확산판;상기 제1 확산판에 대향되어 위치하고, 기판을 지지하는 기판 지지대;상기 제1 확산판과 상기 기판 지지대의 사이에 제공되고, 복수의 분배홀이 형성된 제2 확산판; 및상기 제1 확산판과 상기 제2 확산판의 사이 공간에 플라즈마를 형성하는 플라즈마 발생부를 포함하는 기판 처리 장치.
- 청구항 1에 있어서,상기 제2 확산판의 가장자리와 연결되고, 복수의 가스유도홀이 형성된 측벽부재를 더 포함하는 기판 처리 장치.
- 청구항 1에 있어서,상기 제2 확산판은 위치별로 상이한 상기 분배홀의 유효 면적 밀도를 갖는 기판 처리 장치.
- 청구항 3에 있어서,상기 제2 확산판은 중앙부가 가장자리부보다 상기 분배홀의 유효 면적 밀도가 큰 기판 처리 장치.
- 청구항 1에 있어서,상기 분배홀에 삽입하여 상기 제2 확산판의 개방 면적을 조절하는 삽입체를 더 포함하는 기판 처리 장치.
- 청구항 5에 있어서,상기 삽입체는 중심부가 관통된 관통홀을 포함하는 기판 처리 장치.
- 청구항 1에 있어서,상기 제2 확산판은 복수의 다단 구조로 형성되고,각 단의 상기 분배홀은 서로 인접한 단 간에 위치가 상이한 기판 처리 장치.
- 청구항 1에 있어서,상기 제1 확산판과 상기 제2 확산판의 간격을 조절하는 위치조정부를 더 포함하는 기판 처리 장치.
- 청구항 1에 있어서,상기 챔버의 내벽에 인접하여 상기 기판 지지대의 둘레를 따라 대칭되도록 위치하고, 다단으로 이루어진 복수의 배기 포트를 더 포함하는 기판 처리 장치.
- 청구항 1에 있어서,상기 기판 지지대의 둘레를 따라 상기 기판 지지대의 가장자리부로부터 연장되는 차단링을 더 포함하는 기판 처리 장치.
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CN201680021656.9A CN107466421B (zh) | 2015-04-20 | 2016-04-19 | 基板处理装置 |
US15/566,696 US20180122638A1 (en) | 2015-04-20 | 2016-04-19 | Substrate processing apparatus |
JP2017549781A JP6499771B2 (ja) | 2015-04-20 | 2016-04-19 | 基板処理装置 |
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KR1020150055297A KR101682155B1 (ko) | 2015-04-20 | 2015-04-20 | 기판 처리 장치 |
KR10-2015-0055297 | 2015-04-20 |
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US (1) | US20180122638A1 (ko) |
JP (1) | JP6499771B2 (ko) |
KR (1) | KR101682155B1 (ko) |
CN (1) | CN107466421B (ko) |
TW (1) | TWI634587B (ko) |
WO (1) | WO2016171451A1 (ko) |
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SG11202005088WA (en) * | 2017-12-27 | 2020-07-29 | Mattson Tech Inc | Plasma processing apparatus and methods |
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Also Published As
Publication number | Publication date |
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JP6499771B2 (ja) | 2019-04-10 |
JP2018517276A (ja) | 2018-06-28 |
CN107466421A (zh) | 2017-12-12 |
KR101682155B1 (ko) | 2016-12-02 |
TWI634587B (zh) | 2018-09-01 |
CN107466421B (zh) | 2019-05-28 |
KR20160124534A (ko) | 2016-10-28 |
TW201705197A (zh) | 2017-02-01 |
US20180122638A1 (en) | 2018-05-03 |
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