WO2025185503A1 - 进气组件、半导体工艺腔室及半导体工艺方法 - Google Patents

进气组件、半导体工艺腔室及半导体工艺方法

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Publication number
WO2025185503A1
WO2025185503A1 PCT/CN2025/079232 CN2025079232W WO2025185503A1 WO 2025185503 A1 WO2025185503 A1 WO 2025185503A1 CN 2025079232 W CN2025079232 W CN 2025079232W WO 2025185503 A1 WO2025185503 A1 WO 2025185503A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
air intake
gas
valve plate
switching valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2025/079232
Other languages
English (en)
French (fr)
Other versions
WO2025185503A8 (zh
Inventor
刘贺
纪安宽
张新翌
童鑫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Naura Microelectronics Equipment Co Ltd
Original Assignee
Beijing Naura Microelectronics Equipment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Naura Microelectronics Equipment Co Ltd filed Critical Beijing Naura Microelectronics Equipment Co Ltd
Publication of WO2025185503A1 publication Critical patent/WO2025185503A1/zh
Publication of WO2025185503A8 publication Critical patent/WO2025185503A8/zh
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C16/00Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/44Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
    • C23C16/455Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for introducing gases into reaction chamber or for modifying gas flows in reaction chamber
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C16/00Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/44Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
    • C23C16/4412Details relating to the exhausts, e.g. pumps, filters, scrubbers, particle traps
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C16/00Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/44Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
    • C23C16/455Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for introducing gases into reaction chamber or for modifying gas flows in reaction chamber
    • C23C16/45561Gas plumbing upstream of the reaction chamber
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C16/00Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/44Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
    • C23C16/52Controlling or regulating the coating process
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10PGENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
    • H10P72/00Handling or holding of wafers, substrates or devices during manufacture or treatment thereof
    • H10P72/04Apparatus for manufacture or treatment
    • H10P72/0402Apparatus for fluid treatment
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10PGENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
    • H10P72/00Handling or holding of wafers, substrates or devices during manufacture or treatment thereof
    • H10P72/04Apparatus for manufacture or treatment
    • H10P72/0441Apparatus for sealing, encapsulating, glassing, decapsulating or the like

Definitions

  • the present application belongs to the field of semiconductor technology, and specifically relates to an air intake assembly, a semiconductor process chamber, and a semiconductor process method.
  • the Bosch process refers to a process of depositing a thin film on the lateral edge of the etching in order to prevent or weaken lateral etching in integrated circuit manufacturing. It mainly consists of switching between an etching step dominated by fluorine-based gas and a deposition step dominated by carbon fluorine gas.
  • a semiconductor process chamber includes a chamber body, a deposition gas supply device, and an etching gas supply device.
  • the deposition gas supply device is connected to the interior of the chamber body through a first pipeline
  • the etching gas supply device is connected to the interior of the chamber body through a second pipeline.
  • Both the first pipeline and the second pipeline are provided with control valves, and the control valves are used to control the on-off of the first pipeline and the second pipeline, thereby controlling the deposition gas or the etching gas to enter the chamber body, thereby realizing the switching process between the etching process and the deposition process.
  • the deposition gas When the control valve controls the first pipeline to be connected and the second pipeline to be cut off, the deposition gas enters the chamber body and the etching gas is cut off. However, some of the etching gas remaining in the second pipeline will also enter the chamber body, and then mix with the deposition gas and participate in the process; similarly, when the control valve controls the first pipeline to be cut off and the second pipeline to be connected, the deposition gas is cut off and the etching gas enters the chamber body. However, some of the deposition gas remaining in the first pipeline will also enter the chamber body, and then mix with the etching gas and participate in the process. Therefore, when switching gases, the process gas remaining in the previous process participates in the next process, which will cause the etched side wall to produce an uneven scallop structure. The rough side wall will affect the subsequent process, thereby causing the yield of the device to decrease.
  • the purpose of the embodiments of the present application is to provide an air intake component, a semiconductor process chamber and a semiconductor process method, which can solve the problem in the related art that residual gas in the air intake component affects the process effect during the gas switching process.
  • an embodiment of the present application provides an air intake assembly, comprising an air intake window and a switching valve plate connected to each other, wherein the air intake window is provided with a first gas inlet port and a second gas inlet port, the switching valve plate is movable relative to the air intake window between a first position and a second position, and the switching valve plate is provided with an air path, the air path being in communication with an air outlet end of the air intake assembly;
  • the switching valve plate When the switching valve plate is in the first position, the first gas inlet is connected to the gas circuit and the second gas inlet is disconnected from the gas circuit; when the switching valve plate is in the second position, the second gas inlet is connected to the gas circuit and the first gas inlet is disconnected from the gas circuit.
  • an embodiment of the present application further provides an air intake assembly, comprising a first air intake unit and a second air intake unit.
  • the first air intake unit includes a first air intake pipe, a first air extraction pipe, and a first switching valve plate.
  • the air intake of the first air extraction pipe and the air outlet of the first air intake pipe are arranged side by side.
  • the first switching valve plate is rotatably arranged at the air intake of the first air extraction pipe and the air outlet of the first air intake pipe.
  • the second air intake unit includes a second air intake pipe, a second air extraction pipe and a second switching valve plate, the air intake of the second air extraction pipe and the air outlet of the second air intake pipe are arranged side by side, and the second switching valve plate is rotatably arranged at the air intake of the second air extraction pipe and the air outlet of the second air intake pipe;
  • the first air intake unit and the second air intake unit are alternately communicated with the air outlet end of the air intake assembly.
  • an embodiment of the present application further provides a semiconductor process chamber, comprising a chamber body and the above-mentioned air inlet assembly, wherein the air outlet end of the air inlet assembly is connected to the chamber body.
  • an embodiment of the present application further provides a semiconductor process method, which is applied to the air intake assembly in the first aspect, the method comprising:
  • the switching valve plate is controlled to move to a first position, so that the first gas enters the chamber body through the first gas inlet;
  • the switching valve plate is controlled to move to a second position, so that the second gas enters the chamber body through the second gas inlet;
  • the first process step and the second process step are performed alternately.
  • an embodiment of the present application further provides a semiconductor process method, which is applied to the air intake assembly in the second aspect, the method comprising:
  • the first air intake unit is controlled to communicate with the air outlet end of the air intake assembly, so that the first switching valve plate is in a position to block the air inlet of the first air extraction pipe, and the second switching valve plate is in a rotating state;
  • the second process step is to control the second air intake unit to be connected to the air outlet end of the air intake assembly, so that the second switching valve plate is in a position to block the air inlet of the second air extraction pipe, and the first switching valve plate is in a rotating state.
  • the air intake assembly includes an air intake window and a switching valve plate
  • the switching valve plate by changing the position of the switching valve plate relative to the air intake window, it is possible to achieve communication between the first gas inlet and the outlet end of the air intake assembly, or to achieve communication between the second gas inlet and the outlet end of the air intake assembly, while the outlet end of the air intake assembly is always connected to the chamber body.
  • the switching valve plate directly intercepts the previous process gas at the position of the air intake window, effectively preventing residual gas from the previous process from entering the chamber body and participating in the next process, and preventing the two process gases from mixing and participating in the process, which is beneficial to improving the process effect.
  • the switching valve plate is located in close proximity to the chamber body, the process gas enters the chamber body at a faster speed, avoiding the problem of air intake delay caused by the process gas circulating in the pipeline.
  • the air intake delay time is effectively shortened, and the pressure control process of the chamber body during the two process processes is also faster and more accurate, thereby making the pressure difference of the chamber body easier to control during the two process processes, which is beneficial to improving the process effect.
  • the first air intake unit and the second air intake unit are alternately connected to the air outlet end of the air intake component.
  • the second switching valve plate can be rotated to a position to open the second exhaust pipe, and the second exhaust pipe exhausts the second air intake pipe, that is, exhausts the process gas in the second air intake pipe, and avoids the residual process gas from entering the chamber body and mixing with the process gas of the next process to participate in the next process;
  • the first switching valve plate can be rotated to a position to open the first exhaust pipe, and the first exhaust pipe exhausts the first air intake pipe, that is, exhausts the process gas in the first air intake pipe, and avoids the residual process gas from entering the chamber body and mixing with the process gas of the next process to participate in the next process, which is beneficial to improving the process effect and thus beneficial
  • FIG1 is a schematic structural diagram of a semiconductor process chamber disclosed in an embodiment of the present application.
  • FIG2 is a schematic structural diagram of an air intake assembly disclosed in an embodiment of the present application.
  • FIG3 is a cross-sectional view of the air intake assembly when the switching valve plate is in the first position according to an embodiment of the present application
  • FIG4 is a cross-sectional view of the air intake assembly when the switching valve plate is in the second position according to an embodiment of the present application
  • FIG5 is a top view of a flow equalizer plate disclosed in an embodiment of the present application.
  • FIG6 is a partial schematic diagram of a flow equalizer plate disclosed in an embodiment of the present application.
  • FIG7 is a schematic structural diagram of the pressure control valve disclosed in an embodiment of the present application when the exhaust port is in a closed state;
  • FIG8 is a schematic diagram of the operation of the pressure control valve when the exhaust port is in an open state according to an embodiment of the present application
  • FIG9 is a flow chart of a semiconductor process method disclosed in an embodiment of the present application.
  • FIG10 is a timing diagram of the semiconductor process method disclosed in an embodiment of the present application.
  • FIG11 is a schematic structural diagram of a semiconductor process chamber disclosed in another embodiment of the present application.
  • FIG12 is a schematic structural diagram of an air intake assembly disclosed in another embodiment of the present application.
  • FIG13 is a schematic diagram of the operation of the first rotating valve plate disclosed in another embodiment of the present application.
  • first,” “second,” and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first,” “second,” and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more.
  • the term “and/or” in the specification and claims refers to at least one of the connected objects, and the character “/" generally indicates that the objects connected are in an "or” relationship.
  • the air intake assembly 200 may include an air intake window 210 and a switching valve plate 220.
  • the air intake window 210 is used to introduce different gases
  • the switching valve plate 220 is used to switch the gases so that the gases flow to the outlet end of the air intake assembly 200.
  • the gases introduced into the air intake window 210 may be different process gases, such as deposition gas and etching gas.
  • the air intake window 210 is used to introduce deposition gas and etching gas
  • the switching valve plate 220 is used to switch the deposition gas or etching gas to flow to the outlet end of the air intake assembly 200. More specifically, the air intake assembly 200 alternately introduces deposition gas and etching gas into the chamber body 100 to implement the Bosch process.
  • the switching valve plate 220 is opposite to the air inlet window 210 and is arranged adjacent to the air inlet window 210.
  • the air inlet window 210 is provided with a first gas inlet 211 and a second gas inlet 212.
  • the first gas inlet 211 is used to introduce etching gas
  • the second gas inlet 212 is used to introduce deposition gas.
  • the first gas inlet 211 and the second gas inlet 212 can also respectively introduce other different types of process gases.
  • the first gas inlet 211 may be in communication with an external first gas flow controller 510
  • the second gas inlet 212 may be in communication with an external second gas flow controller 610 .
  • the switching valve plate 220 is connected to the air inlet window 210.
  • the switching valve plate 220 is used to control whether the first gas inlet port 211 and the second gas inlet port 212 are connected to the outlet end of the air inlet assembly 200.
  • the switching valve plate 220 is movable relative to the air inlet window 210.
  • the switching valve plate 220 can be movable relative to the air inlet window 210.
  • the switching valve plate 220 can be driven manually or by a movable driving member.
  • the movable driving member can be a linear driving member such as a linear module or a cylinder.
  • the switching valve plate 220 can also be rotatable relative to the air inlet window 210.
  • the switching valve plate 220 rotates within its own plane to connect the gas path to the first gas inlet port 211 or the second gas inlet port 212.
  • the switching valve plate 220 can be driven manually or by a driving source.
  • the driving source can be a driving source that provides rotational power such as an electric motor or a pneumatic motor.
  • the switching valve plate 220 can move between a first position and a second position relative to the air inlet window 210.
  • the switching valve plate 220 is provided with an air path, which is connected to the air outlet end of the air inlet assembly 200.
  • the switching valve plate When the switching valve plate is in the first position, the first gas inlet 211 is connected to the air path, and the second gas inlet 212 is disconnected from the air path. At this time, the first gas enters the chamber body 100 through the air inlet assembly 200, thereby starting the first process.
  • the switching valve plate 220 is in the second position, the second gas inlet 212 is connected to the air path, and the first gas inlet 211 is disconnected from the air path.
  • the second gas enters the chamber body 100 through the air inlet assembly 200, thereby starting the second process.
  • the first gas introduced into the first gas inlet 211 is an etching gas, and the first process is an etching process
  • the second gas introduced into the second gas inlet 212 is a deposition gas
  • the second process is a deposition process.
  • the switching valve plate 220 only needs to move a small distance so that the gas path thereon is connected to the first gas inlet 211 or the second gas inlet 212 to switch between the first gas and the second gas.
  • the first gas at the first gas inlet 211 or the second gas at the second gas inlet 212 can quickly enter the chamber body 100 through the gas inlet assembly 200 .
  • the distance between the control valve and the chamber body is relatively far. Therefore, when the control valve switches the gas, a large amount of process gas from the previous process still exists in the pipeline between the control valve and the chamber body, and enters the chamber body with the next process to participate in the next process, thereby causing the etched side wall to produce an uneven scallop structure.
  • the first gas inlet 211 can be connected to the outlet of the gas inlet assembly 200, or the second gas inlet 212 can be connected to the outlet of the gas inlet assembly 200, while the outlet of the gas inlet assembly 200 is always connected to the chamber body 100. Since the air inlet window 210 is located at the top of the chamber body 100, the switching valve plate 220 directly intercepts the previous process gas at the position of the air inlet window 210.
  • the switching valve plate 220 by positioning the switching valve plate 220 at the position of the air inlet window 210, the distance between the switching valve plate 220 and the chamber body 100 is greatly reduced, thereby reducing the space between the switching valve plate 220 and the chamber body 100 where residual gas from the previous process can be retained to almost negligible, effectively preventing residual gas from the previous process from entering the chamber body 100 and participating in the next process, thereby preventing the two process gases from mixing and participating in the process, which is beneficial to improving the process effect.
  • the switching valve plate 220 since the switching valve plate 220 is arranged close to the chamber body 100, the process gas enters the chamber body 100 at a faster speed, avoiding the problem of air intake delay caused by the circulation of process gas in the pipeline.
  • the air intake delay time is effectively shortened, so the pressure control process of the chamber body 100 in the two process steps will also be faster and more accurate, thereby making the pressure difference value of the chamber body 100 in the two process steps easier to control.
  • the first gas inlet 211 is used to introduce etching gas
  • the second gas inlet 212 is used to introduce deposition gas.
  • the two process steps are etching and deposition, respectively.
  • the gas inlet assembly 200 in this embodiment can be used in a Bosch etching process.
  • the rapid switching between the etching and deposition processes can effectively avoid the formation of an uneven scalloped structure on the sidewalls of the deep holes obtained by etching, making the sidewalls of the deep holes smoother, avoiding any impact on subsequent processes, and facilitating improved device yield.
  • the first gas inlet 211 and the second gas inlet 212 are arranged in pairs. Multiple pairs of the first gas inlet 211 and the second gas inlet 212 are spaced apart around the circumference of the air inlet window 210. In the example of FIG2 , six pairs of the first gas inlet 211 and the second gas inlet 212 are shown as an example. Those skilled in the art will appreciate that more or fewer pairs of the first gas inlet 211 and the second gas inlet 212 are also feasible. Accordingly, multiple gas paths are spaced apart, and each gas path corresponds to each pair of the first gas inlet 211 and the second gas inlet 212.
  • multiple pairs of the second gas inlet 212 and the first gas inlet 211 are used to achieve simultaneous gas intake from multiple second gas inlets 212 or simultaneous gas intake from multiple first gas inlets 211. This increases the gas outlet area while improving gas intake efficiency and process efficiency, which is beneficial to improving gas intake uniformity.
  • the air inlet window 210 can be a circular structure, and the second gas inlet port 212 and the first gas inlet port 211 can be opened on the peripheral surface of the air inlet window 210, but this is not restrictive. In some other embodiments, the second gas inlet port 212 and the first gas inlet port 211 can also be opened on the upper end surface of the air inlet window 210. The embodiment of the present application does not limit the opening position of the second gas inlet port 212 and the first gas inlet port 211.
  • six pairs of second gas inlets 212 and first gas inlets 211 are spaced apart in the circumferential direction of the air inlet window 210, and six gas paths are spaced apart, for example, and each gas path corresponds to each pair of second gas inlets 212 and first gas inlet 211.
  • the air inlet window 210 may also be provided with a first gas inlet 211 and a second gas inlet 212 .
  • the air intake assembly 200 further includes a blocking member disposed between the air intake window 210 and the switching valve plate 220.
  • the air path includes a first air path section 221 and a second air path section 222.
  • the outlet end of the first air path section 221 and the outlet end of the second air path section 222 are respectively connected to the air outlet end of the air intake assembly 200.
  • the blocking member selectively blocks the first air path section 221 or the second air path section 222 according to the movement position of the switching valve plate 220.
  • the blocking member may be an elastic structure or a rigid structure, and the present embodiment does not impose any specific limitation on the structure of the blocking member.
  • the switching valve plate 220 when the switching valve plate 220 is in the first position, the first gas inlet 211 is connected to the inlet end of the first gas path section 221, and the blocking member blocks the inlet end of the second gas path section 222, so that the second gas inlet 212 cannot be connected to the second gas path section 222.
  • the switching valve plate 220 when the switching valve plate 220 is in the second position, the second gas inlet 212 is connected to the inlet end of the second gas path section 222, and the blocking member blocks the inlet end of the first gas path section 221, so that the first gas inlet 211 cannot be connected to the first gas path section 221.
  • the first gas section 221 and the second gas section 222 both have an inlet end and an outlet end, and the outlet end of the first gas section 221 and the outlet end of the second gas section 222 are respectively connected to the outlet end of the air intake component 200; and when the switching valve plate 220 is in the first position as shown in Figure 3, the first gas inlet 211 is connected to the inlet end of the first gas section 221, and the sealing member blocks the inlet end of the second gas section 222; and when the switching valve plate 220 is in the second position as shown in Figure 4, the second gas inlet 212 is connected to the inlet end of the second gas section 222, and the sealing member blocks the inlet end of the first gas section 221.
  • the switching valve plate 220 when the switching valve plate 220 is in the first position, the first gas inlet 211 is opposite to the first gas path section 221, and the second gas inlet 212 is staggered with the second gas path section 222; when the switching valve plate 220 is in the second position, the first gas inlet 211 is staggered with the first gas path section 221, and the second gas inlet 212 is opposite to the second gas path section 222.
  • the blocking member directly blocks the first gas section 221 or the second gas section 222, thereby controlling the on-off connection between the first gas inlet 211 and the first gas section 221 and the on-off connection between the second gas inlet 212 and the second gas section 222, thereby preventing part of the first gas from flowing into the first gas section 221 when the first gas inlet 211 and the first gas section 221 are not connected, and also preventing part of the second gas from flowing into the second gas section 222 when the second gas inlet 212 and the second gas section 222 are not connected, which is beneficial to improving the isolation effect of gas during the process.
  • the corresponding gas path section is blocked by the blocking member.
  • the other is in a holding state. Then, the air pressure of the gas path section corresponding to the gas in the holding state gradually rises.
  • the switching valve plate 220 moves to release the gas, the gas will flow into the corresponding gas path section faster, which is beneficial to increase the gas switching speed and thus improve the process effect.
  • the air intake assembly 200 may not be provided with a sealing member.
  • the switching valve plate 220 When the switching valve plate 220 is in the first position, the switching valve plate 220 directly blocks the second gas inlet 212, so that the second gas inlet 212 is not connected to the gas circuit; when the switching valve plate 220 is in the second position, the switching valve plate 220 directly blocks the first gas inlet 211, so that the first gas inlet 211 is not connected to the gas circuit.
  • the blocking member blocks the second gas path section 222 to prevent the second gas from entering the chamber body 100 through the gas path; when the switching valve plate 220 is in the second position, the blocking member blocks the first gas path section 221 to prevent the first gas from entering the chamber body 100 through the gas path.
  • the number of the blocking members is at least two, including a first blocking member 231 and a second blocking member 232.
  • the first blocking member 231 is arranged at the inlet end of the first gas path section 221, and the second blocking member 232 is arranged at the inlet end of the second gas path section 222.
  • the blocking members are elastic structures. The positions of the first blocking member 231 and the second blocking member 232 relative to the air intake window 210 are fixed. During the movement of the switching valve plate 220, the first blocking member 231 and the second blocking member 232 can produce elastic deformation, thereby changing the shapes of the first blocking member 231 and the second blocking member 232.
  • the deformation state of the first blocking member 231 determines whether the first blocking member 231 blocks the first gas path section 221. Similarly, the deformation state of the second blocking member 232 determines whether the second blocking member 232 blocks the second gas path section 222.
  • the switching valve plate 220 When the switching valve plate 220 is in the first position, as shown in FIG3 , the first blocking member 231 is in an elastically deformed state, its shape changes, and the first blocking member 231 no longer blocks the first gas path segment 221, allowing the first gas inlet 211 to communicate with the inlet end of the first gas path segment 221.
  • the second blocking member 232 blocks the inlet end of the second gas path segment 222.
  • the switching valve plate 220 is in the second position, as shown in FIG4
  • the second blocking member 232 When the switching valve plate 220 is in the second position, as shown in FIG4 , the second blocking member 232 is in an elastically deformed state, its shape changes, and the second blocking member 232 no longer blocks the second gas path segment 222.
  • the second gas inlet 212 communicates with the inlet end of the second gas path segment 222.
  • the first blocking member 231 blocks the inlet end of the first gas path segment 221.
  • the switching valve plate 220 when the switching valve plate 220 is in the first position, as shown in FIG3 , the first blocking member 231 is in a compressed state, so the volume of the first blocking member 231 is relatively small, and the first blocking member 231 does not block the inlet end of the first gas path segment 221.
  • the second blocking member 232 does not produce elastic deformation, that is, the second blocking member 232 is in a relaxed state, the volume of the second blocking member 232 is relatively large, and the second blocking member 232 directly blocks the inlet end of the second gas path segment 222.
  • the first blocking member 231 does not produce elastic deformation, that is, the first blocking member 231 is in a relaxed state, the volume of the first blocking member 231 is relatively large, and the first blocking member 231 directly blocks the inlet end of the first gas path segment 221.
  • the second blocking member 232 is in a compressed state, the volume of the second blocking member 232 is relatively small, and the second blocking member 232 does not block the inlet end of the second gas path segment 222.
  • At least two elastic blocking members are provided, and whether the corresponding gas path section is blocked is determined by whether the blocking members produce elastic deformation.
  • the blocking members that produce elastic deformation have better blocking effects and improved sealing performance.
  • the air intake assembly 200 further includes a first stopper 241 and a first fixing member 251, which are respectively located on both sides of the first blocking member 231, the first stopper 241 is connected to the air intake window 210, and the first fixing member 251 is connected to the switching valve plate 220.
  • the switching valve plate 220 switches from the second position to the first position, the distance between the first stopper 241 and the first fixing member 251 changes, and the first blocking member 231 is located therebetween. Therefore, the first stopper 241 and the first fixing member 251 squeeze the first blocking member 231 to cause elastic deformation of the first blocking member 231.
  • the first stopper 241 and the first fixing member 251 can both be block-shaped structures, or other structures. The embodiments of the present application do not limit the structures of the first stopper 241 and the first fixing member 251.
  • the first stopper 241 can be fixedly connected to the air intake window 210 by welding, bonding, etc., and the position of the first stopper 241 relative to the air intake window 210 is fixed; the first fixing member 251 and the switching valve plate 220 can also be fixedly connected by welding, bonding, etc., so that the first fixing member 251 and the switching valve plate 220 are relatively fixed, and the first fixing member 251 moves with the switching valve plate 220.
  • whether the first blocking member 241 and the first fixing member 251 squeeze the first blocking member 231 is directly used to control whether the first blocking member 231 generates elastic deformation. That is, by switching the movement position of the valve plate 220, it is directly controlled whether the first blocking member 231 generates elastic deformation.
  • it is beneficial to accurately change the deformation state of the first blocking member 231, and avoid the use of electric control and other methods, which may cause the first blocking member 231 to be unable to accurately block the first gas path section 221 due to abnormal conditions such as power failure.
  • the first blocking member 231 may be an electro-deformable element, and whether the first blocking member 231 generates elastic deformation is controlled by whether the first blocking member 231 is energized; or, the first blocking member 231 may be a thermo-deformable element, and whether the first blocking member 231 generates elastic deformation is controlled by whether the first blocking member 231 is heated.
  • the air intake assembly 200 further includes a second stopper 242 and a second fixing member 252, which are respectively located on either side of the second blocking member 232.
  • the second stopper 242 is connected to the air intake window 210, and the second fixing member 252 is connected to the switching valve plate 220.
  • the switching valve plate 220 switches from the first position to the second position, the distance between the second stopper 242 and the second fixing member 252 changes, and the second blocking member 232 is located therebetween. Therefore, the second stopper 242 and the second fixing member 252 squeeze the second blocking member 232, causing the second blocking member 232 to produce elastic deformation.
  • the second stopper 242 and the second fixing member 252 can both be block-shaped structures, or other structures. The present embodiment of the application does not limit the structures of the second stopper 242 and the second fixing member 252.
  • the second stopper 242 can be fixedly connected to the air intake window 210 by welding, bonding, etc., and the position of the second stopper 242 relative to the air intake window 210 is fixed; the second fixing member 252 and the switching valve plate 220 can also be fixedly connected by welding, bonding, etc., so that the second fixing member 252 and the switching valve plate 220 are relatively fixed, and the second fixing member 252 moves with the switching valve plate 220.
  • whether the second blocking member 242 and the second fixing member 252 squeeze the second blocking member 232 is directly used to control whether the second blocking member 232 produces elastic deformation. That is, by switching the movement position of the valve plate 220, it is directly controlled whether the second blocking member 232 produces elastic deformation. In this way, through the mechanical structure, it is beneficial to accurately change the deformation state of the second blocking member 232, and avoid the use of electric control and other methods due to abnormal conditions such as power failure, which may cause the second blocking member 232 to be unable to accurately block the second gas path section 222.
  • the second blocking member 232 may be an electro-deformable element, and whether the second blocking member 232 generates elastic deformation is controlled by whether the second blocking member 232 is energized; or, the second blocking member 232 may be a thermo-deformable element, and whether the second blocking member 232 generates elastic deformation is controlled by whether the second blocking member 232 is heated.
  • the distance between the first stopper 241 and the first fixing member 251 decreases, and the first blocking member 231 is compressed, so the first blocking member 231 cannot block the first gas path section 221, while the distance between the second stopper 242 and the second fixing member 252 increases, the second blocking member 232 is not compressed, and the second blocking member 232 blocks the second gas path section 222.
  • the first gas inlet 211 is connected to the chamber body 100 through the first gas path section 221, and the chamber body 100 can be opened.
  • the second gas inlet 212 is connected to the chamber body 100 through the second gas path section 222, and the second process can be started in the chamber body 100.
  • the air intake assembly 200 further includes a first sealing member 271, which is disposed between the switching valve plate 220 and the air intake window 210.
  • the first sealing member 271 is located between the second gas inlet 212 and the first gas inlet 211 to isolate the second gas inlet 212 from the first gas inlet 211.
  • the first sealing member 271 may be a sealing structure such as a sealing ring or a sealing strip, or other sealing structures.
  • the switching valve plate 220 can be provided with a groove, and the first gas inlet 211 and the second gas inlet 212 can be connected to the gas path through the groove, and the first seal 271 is provided in the groove, and the first seal 271 is a strip structure, and the two ends of the first seal 271 respectively abut against the groove wall of the groove, dividing the groove into two parts, and the two parts are respectively connected to the first gas inlet 211 and the second gas inlet 212, thereby sealing and isolating the second gas inlet 212 and the first gas inlet 211.
  • the first sealing member 271 is used to isolate the second gas inlet 212 from the first gas inlet 211 , thereby preventing gas cross-talk between the first gas inlet 211 and the second gas inlet 212 , thereby improving the sealing performance of the gas inlet assembly 200 .
  • the air intake assembly 200 further includes a second seal 272, which is disposed between the air intake window 210 and the switching valve plate 220 to seal the gap between the air intake window 210 and the switching valve plate 220.
  • the second seal 272 can be a sealing ring disposed around the first gas inlet 211 and the second gas inlet 212. As shown in FIG3 , the sealing ring surrounds one end of the first gas inlet 211 near the first gas path section 221 and one end of the second gas inlet 212 near the second gas path section 222.
  • the sealing ring also surrounds both the first gas path section 221 and the second gas path section 222, thereby preventing gas from leaking from the gap between the air intake window 210 and the switching valve plate 220.
  • the second seal 272 can also be other sealing structures.
  • a second sealing groove is provided on the side of the air intake window 210 facing the switching valve plate 220, and the second seal 272 is disposed in the second sealing groove.
  • the second sealing member 272 is used to seal the gap between the air intake window 210 and the switching valve plate 220 to prevent the first gas and the second gas from flowing out through the gap between the air intake window 210 and the switching valve plate 220, which is beneficial to improving the sealing performance.
  • the air intake assembly 200 may not be provided with the first seal 271 and the second seal 272, and the sealing performance can be improved by increasing the contact tightness between the switching valve plate 220 and the air intake window 210 to avoid cross-flow and leakage.
  • the air intake assembly 200 also includes: a flow equalizer plate 260, which is located on the side of the switching valve plate 220 facing away from the air intake window 210, and the flow equalizer plate 260 is provided with a plurality of flow equalizer holes 262, and the air path is connected to the air outlet end of the air intake assembly 200 through each flow equalizer hole 262.
  • the uniform flow holes 262 on the uniform flow plate 260 are used to divert the first gas or the second gas flowing into the switching valve plate 220 so that the first gas or the second gas flows out more evenly, which is beneficial to improving process uniformity.
  • the air intake assembly 200 may not be provided with the flow equalizer 260 , and the air path of the switching valve plate 220 is directly connected to the outlet end of the air intake assembly 200 .
  • the flow equalizing holes 262 on the flow equalizing plate 260 are directly connected to the gas path.
  • the flow plate 260 is further provided with a flow balancing groove 261, which forms a flow balancing space with the switching valve plate 220.
  • the flow balancing groove 261 connects the multiple flow balancing holes 262 and the gas path, that is, the gas path is connected to the gas outlet end of the air inlet assembly 200 through the flow balancing groove 261 and the flow balancing holes 262.
  • the flow balancing groove 261 can be a circular groove or a groove of other shapes, as long as it can be connected to each flow balancing hole 262.
  • the process gas before the process gas enters the flow balancing hole 262 from the first gas inlet 211 or the second gas inlet 212, it is first diffused and mixed through the flow balancing groove 261, and then further homogenized through each flow balancing hole 262, which is beneficial to improving the flow balancing performance of the flow plate 260.
  • the flow uniforming plate 260 is provided with multiple flow uniforming areas along its circumference, and each flow uniforming area is provided with a flow uniforming groove 261 and multiple flow uniforming holes 262.
  • the flow uniforming groove 261 corresponds one-to-one to the first gas inlet 211 and the second gas inlet 212.
  • the first gas inlet 211 and the second gas inlet 212 of the same group correspond to one flow uniforming groove 261.
  • the air intake assembly 200 further includes a third seal 273 disposed between the flow equalizer plate 260 and the switching valve plate 220 to seal the gap between the flow equalizer plate 260 and the switching valve plate 220.
  • the third seal 273 may be a sealing ring or other sealing structure; a third seal 273 is provided outside each flow equalizer region of the flow equalizer plate 260.
  • each flow equalizer region of the flow equalizer plate 260 is provided with a third sealing groove, within which the third seal 273 is disposed.
  • the third sealing member 273 is used to seal the gap between the flow equalizing plate 260 and the switching valve plate 220 to prevent the first gas and the second gas from flowing out through the gap therebetween, thereby further improving the sealing performance.
  • the air intake assembly 200 may not be provided with the third sealing member 273 , and the sealing performance can be improved by increasing the contact tightness between the switching valve plate 220 and the flow equalizing plate 260 to avoid cross-flow and leakage.
  • the semiconductor process chamber includes a chamber body 100 and the gas inlet assembly 200 of the above embodiment.
  • the chamber body 100 provides a place for the semiconductor process, and the interior of the chamber body 100 is a vacuum environment.
  • the gas outlet of the gas inlet assembly 200 is connected to the chamber body 100, and the gas inlet assembly 200 is used to provide process gas into the chamber body 100.
  • the chamber body 100 is provided with an gas inlet 101, and the gas inlet assembly 200 is disposed at the gas inlet 101.
  • an gas inlet window 210 is located at the gas inlet 101, and the gas inlet window 210 is used to seal the gas inlet 101.
  • the semiconductor process chamber may be applied to the Bosch process, and the process gas includes an etching gas and a deposition gas.
  • the etching gas may be a fluorine-based gas
  • the deposition gas may be a carbon-based gas.
  • the semiconductor process chamber utilizes the above-mentioned gas inlet assembly 200 to achieve rapid switching between the first gas and the second gas, avoiding the problem of delayed gas intake of the chamber body 100, and is conducive to accurately controlling the pressure difference value of the chamber body 100 during different process steps.
  • the semiconductor process chamber can be used to perform a Bosch etching process to etch high aspect ratio holes. Since the etching and deposition gases can be switched quickly, the side walls of the etched holes are smoother, which is conducive to improving the yield of the device.
  • a base 110 is provided in the chamber body 100 , and the base 110 is used to support a chip 111 , which may be a silicon wafer.
  • An inner lining 120 is provided on the periphery of the base 110 , and the inner lining 120 is provided to prevent the process gas from contaminating the inner wall of the chamber body 100 or other devices in the chamber body 100 .
  • the chamber body 100 is provided with an exhaust port
  • the semiconductor process chamber further includes a pressure control valve 400, which is provided at the exhaust port to adjust the opening of the exhaust port.
  • the pressure control valve 400 can be a solenoid valve, a butterfly valve, a ball valve, or other valve body that can perform switching and regulating effects.
  • the embodiment of the present application does not limit the type of the pressure control valve 400. In this way, by adjusting the pressure control valve 400, the first gas or the second gas that completes the process is discharged to the outside of the chamber body 100 through the exhaust port, which facilitates the chamber body 100 to proceed to the next process step and realizes rapid switching between different process steps.
  • the semiconductor process chamber further includes: a vacuum pump 300, the inlet end of the vacuum pump 300 is connected to the exhaust port, and the vacuum pump 300 is used to provide suction power; the number of vacuum pumps 300 is at least two, including a dry pump 320 and a molecular pump 310, the inlet end of the molecular pump 310 is directly connected to the exhaust port, and the inlet end of the dry pump 320 is directly connected to the outlet end of the molecular pump 310, the molecular pump 310 is suitable for pumping air in a high vacuum environment, and the dry pump 320 is suitable for pumping air in a lower vacuum environment.
  • a vacuum pump 300 the inlet end of the vacuum pump 300 is connected to the exhaust port, and the vacuum pump 300 is used to provide suction power
  • the number of vacuum pumps 300 is at least two, including a dry pump 320 and a molecular pump 310, the inlet end of the molecular pump 310 is directly connected to the exhaust port, and the inlet end of the dry pump 320 is directly
  • the pressure control valve 400 includes a valve plate 410 and a driver 420.
  • the driver 420 is connected to the valve plate 410 and drives the valve plate 410 to rotate to increase or decrease the opening of the exhaust port.
  • the driver 420 can be a driving source capable of generating rotational power, such as an electric motor or a pneumatic motor.
  • the pressure control valve 400 includes at least two valve plates 410 and a driver 420.
  • Each valve plate 410 is rotatably disposed at the exhaust port to open or close the exhaust port.
  • the driver 420 is connected to each valve plate 410.
  • the driver 420 can drive each valve plate 410 to rotate simultaneously.
  • the valve plates 410 rotate away from or toward each other to increase or decrease the opening of the exhaust port.
  • Each driver 420 drives the corresponding valve plate 410 to rotate, thereby causing the valve plates 410 to move away from or toward each other.
  • each valve plate 410 In the process of adjusting the opening of the exhaust port, at least two valve plates 410 operate simultaneously. Compared with the previous embodiment, the rotation stroke of each valve plate 410 is reduced, that is, the rotation angle of each valve plate 410 is reduced, so the driving time of the driving member 420 is shortened, and the action time of the pressure control valve 400 is shortened, thereby realizing rapid exhaust of the vacuum pump 300 and further improving the switching efficiency between the etching process and the deposition process.
  • the semiconductor process chamber further includes a first gas flow controller 510 and a first gas extraction pipeline 520.
  • the first end of the first gas extraction pipeline 520 and the first gas inlet 211 are respectively connected to the outlet end of the first gas flow controller 510, and the second end of the first gas extraction pipeline 520 is connected to the inlet end of the vacuum pump 300.
  • the first gas inlet 211 is connected to the outlet end of the first gas flow controller 510 via a first pipeline, and the first gas flow controller 510 controls the flow rate of the first gas entering the first gas inlet 211.
  • the first end of the first gas extraction pipeline 520 is directly connected to the first pipeline, and the second end of the first gas extraction pipeline 520 is connected to the inlet end of the dry pump 320.
  • the first air extraction pipeline 520 is provided with a first control valve 530.
  • the first control valve 530 includes a first needle valve 531 and a first pneumatic shut-off valve 532.
  • the first needle valve 531 and the first pneumatic shut-off valve 532 are spaced apart and arranged in the first air extraction pipeline 520.
  • the first pneumatic shut-off valve 532 controls the on-off of the first air extraction pipeline 520, and the first needle valve 531 can precisely adjust the air flow in the first air extraction pipeline 520.
  • the first control valve 530 is used to open the first gas extraction pipeline 520, so that the first gas enters the vacuum pump 300 through the first gas extraction pipeline 520, thereby avoiding excessive gas pressure due to holding the breath.
  • the semiconductor process chamber further includes a second gas flow controller 610 and a second gas extraction pipeline 620.
  • the first end of the second gas extraction pipeline 620 and the second gas inlet 212 are respectively connected to the outlet end of the second gas flow controller 610, and the second end of the second gas extraction pipeline 620 is connected to the inlet end of the vacuum pump 300.
  • the second gas flow controller 610 is connected to the outlet end of the second gas flow controller 610 via the second pipeline.
  • the second gas flow controller 610 controls the flow rate of the second gas entering the second gas inlet 212.
  • the first end of the second gas extraction pipeline 620 is directly connected to the second pipeline, and the second end of the second gas extraction pipeline 620 is connected to the inlet end of the dry pump 320.
  • the second air extraction pipeline 620 is provided with a second control valve 630.
  • the second control valve 630 includes a second needle valve 631 and a second pneumatic shut-off valve 632.
  • the second needle valve 631 and the second pneumatic shut-off valve 632 are spaced apart from each other in the second air extraction pipeline 620.
  • the second pneumatic shut-off valve 632 controls the on-off of the second air extraction pipeline 620, and the second needle valve 631 can precisely adjust the air flow in the second air extraction pipeline 620.
  • the second control valve 630 is used to open the second exhaust pipeline 620, so that the second gas enters the vacuum pump 300 from the second exhaust pipeline 620, thereby avoiding excessive gas pressure due to holding the breath.
  • the semiconductor processing chamber further includes a pressure sensing element disposed within the chamber body 100 to detect the air pressure within the chamber body 100.
  • the pressure sensing element may be, but is not limited to, a pressure sensor, and is communicatively connected to the pressure control valve 400.
  • the pressure control valve 400 When the first gas inlet 211 is connected to the gas circuit, the pressure control valve 400 is opened to a first opening corresponding to the pressure value detected by the pressure sensing element, thereby maintaining the first air pressure value in the chamber body 100.
  • the second gas inlet 212 is connected to the gas circuit, the pressure control valve 400 is opened to a second opening corresponding to the pressure value detected by the pressure sensing element, thereby maintaining the second air pressure value in the chamber body 100.
  • the difference between the first and second air pressure values is within a preset pressure differential range.
  • the pressure control range of the pressure control valve 400 is 30 mTorr-200 mTorr.
  • the first air pressure value may be 75 mTorr
  • the second air pressure value may be 55 mTorr
  • the preset pressure differential range may be 10 mTorr-30 mTorr.
  • the difference between the first and second air pressure values is 20 mTorr, so the difference between the two is within the preset pressure differential range.
  • the first and second air pressure values may also be other values, and the preset pressure differential range can be set as needed.
  • the difference between the first and second pressure values reaches 150 mTorr the etching rate and throughput are higher.
  • the opening of the pressure control valve 400 is adjusted according to the air pressure of the chamber body 100, so that the chamber body 100 is maintained at an appropriate air pressure value during the first process and the second process, respectively.
  • This is beneficial to controlling the pressure difference of the chamber body 100 during the first process and the second process to be maintained within an appropriate range, and further beneficial to taking into account both process efficiency and process uniformity.
  • the semiconductor process chamber further includes a controller, the controller including at least one memory and at least one processor, the memory storing a computer program, and the computer program, when executed by the processor, implementing the steps of the semiconductor process method, the semiconductor process method including:
  • the switching valve plate 220 When executing the first process step, the switching valve plate 220 is controlled to move to the first position so that the first gas enters the chamber body 100 through the first gas inlet 211; when executing the second process step, the switching valve plate 220 is controlled to move to the second position so that the second gas enters the chamber body 100 through the second gas inlet 212.
  • the controller can be a host computer or a slave computer.
  • the controller can directly control the switching valve plate 220 or control a driving member that drives the switching valve plate 220 to move the switching valve plate 220 to the first position or the second position, thereby introducing the corresponding process gas into the interior of the chamber body 100.
  • a controller is used to realize an automated switching process of the movement position of the switching valve plate 220, which is conducive to quickly switching the movement position of the switching valve plate 220, and then quickly switching the first process step and the second process step, which is conducive to further shortening the switching time of the first gas and the second gas, and further effectively avoiding the problem of delayed air intake of the chamber body 100.
  • the pressure control process of the chamber body 100 in the first process step and the second process step will also be faster and more accurate, thereby improving the process effect.
  • the first process step is an etching step
  • the first gas is an etching gas
  • the second process step is a deposition step
  • the second gas is a deposition gas.
  • the semiconductor process method further includes: alternating the first process step and the second process step, that is, alternating the etching step and the deposition step.
  • the controller controls the switching valve plate 220 to continuously switch between the first position and the second position, thereby achieving rapid switching between the etching step and the deposition step.
  • the problem of air intake delay in each process step is effectively avoided, the duration of the entire process is effectively shortened, and the process of the chamber body 100 in each process step is faster and more accurate, which is conducive to further improving the process effect.
  • the first gas or the second gas is introduced into the chamber body 100 through a pipeline, there is a delay in the time for the first gas and the second gas to enter the chamber body 100.
  • the pressure detection element also needs to delay the detection of the pressure value of the chamber body 100, and then the pressure control valve 400 also needs to delay the action. Since there are delays in both the air intake and pressure control processes, the RF loading also needs to be delayed, resulting in the extension of the time of each cycle process of the entire Bosch process.
  • the semiconductor process method includes a first process step and a second process step that are performed alternately.
  • the second process step includes controlling the switching valve plate 220 to move to a second position, and the second gas inlet 212 is connected to the chamber body 100 through a gas path, so that the second gas enters the chamber body 100 through the second gas inlet 212;
  • the first process step includes controlling the switching valve plate 220 to move to a first position, and the first gas inlet 211 is connected to the chamber body 100 through a gas path, so that the first gas enters the chamber body 100 through the first gas inlet 211.
  • the first process step is an etching step
  • the second process step is a deposition step.
  • the semiconductor process method is a Bosch process, which includes multiple cyclic processes, each of which includes the above-mentioned deposition step and etching step.
  • the etching step includes a first etching step and a second etching step, as shown in FIG9 .
  • the deposition step includes controlling the switching valve plate 220 to move to the second position, allowing deposition gas to rapidly enter the chamber body 100. Simultaneously, the pressure sensing element detects the pressure within the chamber body 100, and the pressure control valve 400 adjusts its opening based on the detected pressure to maintain the chamber body 100 at the second pressure.
  • a deposition gas typically Ar or C4F4 , forms a fluorocarbon polymer layer on the sides of the holes in the wafer 111. To prevent the formation of a fluorocarbon polymer layer on the bottom of the holes, a relatively low RF frequency is typically used.
  • the first etching step includes controlling the switching valve plate 220 to move to a first position, allowing etching gas to rapidly enter the chamber body 100.
  • the pressure sensing element detects the pressure within the chamber body 100, and the pressure control valve 400 adjusts its opening based on the detected pressure to maintain the chamber body 100 at a first pressure.
  • the difference between the first and second pressures is within a predetermined pressure differential range.
  • the etching step is usually performed using a plasma etching gas such as Ar, O2 , SF6 , etc.
  • the number of Bosch process cycles can be set as needed. A single process is considered complete after the set number of cycles have been completed. Specifically, etching and deposition steps are performed alternately. At the end of an etching step, the etching gas is exhausted from the chamber body 100 while the deposition gas is injected. Similarly, at the end of a deposition step, the deposition gas is exhausted from the chamber body 100 while the etching gas is injected, repeating the process in this order.
  • Figure 10 shows a timing diagram of four cycle processes, wherein the second gas flow controller 610 controls the flow rate of the second gas to be 250 sccm, the first gas flow controller 510 controls the flow rate of the first gas to be 85 sccm, the RF voltage of the upper RF in the deposition step is 2200 dBW, the RF voltage of the upper RF in the etching step is 2794 dBW-2800 dBW, the RF voltage of the low frequency in the first etching step is 330 dBW-336 dBW, the gas pressure of the chamber body 100 during the deposition process is 75 mTorr, and the gas pressure of the chamber body 100 during the etching process is 55 mTorr. During the process, the gas pressure of the chamber body 100 presents a trapezoidal square wave waveform.
  • the above process flow directly utilizes the movement of the switching valve plate 220 to control the entry of the first or second gas into the chamber body 100.
  • the air intake component 200 includes a first air intake unit and a second air intake unit, and the first air intake unit and the second air intake unit are alternately connected to the air outlet end of the air intake component 200.
  • the first air intake unit includes a first air intake pipe 281, a first air extraction pipe 283, and a first switching valve plate 223.
  • the air intake end of the first air intake pipe 281 is a first gas inlet 211, through which the first air intake pipe 281 can flow.
  • the air intake of the first air extraction pipe 283 and the air outlet of the first air intake pipe 281 are arranged side by side.
  • the first switching valve plate 223 is rotatably disposed between the air intake of the first air extraction pipe 283 and the air outlet of the first air intake pipe 281. When the first switching valve plate 223 rotates to different positions, it can open the air intake of the first air extraction pipe 283 and the air outlet of the first air intake pipe 281.
  • the air outlet of the first air intake pipe 281 and the air intake of the first air extraction pipe 283 can be directly controlled by changing the rotational position of the first switching valve plate 223, eliminating the need to control the first air intake pipe 281 and the first air extraction pipe 283 separately.
  • the second air intake unit includes a second air intake pipe 282, a second air extraction pipe 284, and a second switching valve plate 224.
  • the air intake end of the second air intake pipe 282 is the second gas inlet 212, through which the second air intake pipe 282 can flow.
  • the air intake of the second air extraction pipe 284 and the air outlet of the second air intake pipe 282 are arranged side by side.
  • the second switching valve plate 224 is rotatably disposed between the air intake of the second air extraction pipe 284 and the air outlet of the second air intake pipe 282. When the second switching valve plate 224 rotates to different positions, it can open the air intake of the second air extraction pipe 284 and the air outlet of the second air intake pipe 282.
  • the air outlet of the second air intake pipe 282 and the air intake of the second air extraction pipe 284 can be directly controlled by changing the rotational position of the second switching valve plate 224, eliminating the need to control the second air intake pipe 282 and the second air extraction pipe 284 separately.
  • first switching valve plate 223 and the second switching valve plate 224 can be respectively connected to a driving source that provides rotational power, such as an electric motor or a pneumatic motor, to drive the first switching valve plate 223 or the second switching valve plate 224 to rotate.
  • a driving source that provides rotational power, such as an electric motor or a pneumatic motor
  • the linear drive member or the driving source described above for driving the switching valve plate 220 can be controlled by a controller. The controller controls the states of the two linear drives or the two driving sources, thereby causing the first air intake unit and the second air intake unit to alternately intake air.
  • the first air inlet unit and the second air inlet unit are alternately connected to the air outlet end of the air inlet component 200.
  • the second switching valve plate 224 can be rotated to a position to open the second exhaust pipe 284, and the second exhaust pipe 284 exhausts the second air inlet pipe 282, that is, extracts the process gas in the second air inlet pipe 282 to prevent the residual process gas from entering the chamber body 100 and mixing with the process gas of the next process to participate in the next process;
  • the first switching valve plate 223 can be rotated to a position to open the first exhaust pipe 283, and the first exhaust pipe 283 exhausts the first air inlet pipe 281, that is, extracts the process gas in the first air inlet pipe 281 to prevent the residual process gas from the previous process from entering the chamber body 100 and mixing with the process gas of the next process to participate in the next process
  • the first gas inlet 281 can be fed with etching gas
  • the second gas inlet 282 can be fed with deposition gas
  • the two process processes are respectively the etching process and the deposition process.
  • the switching between the etching process and the deposition process can effectively avoid the generation of an uneven scallop structure on the sidewalls of the deep hole obtained by etching, making the sidewalls of the deep hole smoother, avoiding the impact on subsequent processes, and helping to improve the process effect, thereby helping to improve the yield of the device.
  • the first gas inlet 211 and the second gas inlet 212 can also be fed with other different types of process gases.
  • the first switching valve plate 223 when the first air inlet unit is connected to the outlet of the air inlet assembly 200, the first switching valve plate 223 is in a position that blocks the air inlet of the first air extraction pipe 283, that is, the first air extraction pipe 283 cannot extract air. In this embodiment, by blocking the first air extraction pipe 283, it is possible to prevent the first air extraction pipe 283 from extracting gas from the chamber body 100, thereby preventing the process from being affected.
  • the first switching valve plate 223 is in a position to open the first air inlet pipe 281, and the first air inlet pipe 281 takes in air.
  • the first exhaust pipe 283 is blocked, the first exhaust pipe 283 is prevented from extracting the gas in the first air inlet pipe 281, thereby ensuring that the first process gas entering the first air inlet pipe 281 can smoothly enter the chamber body 100.
  • the air outlet of the first air extraction pipe 283 is connected to the first air extraction pump.
  • the first switching valve plate 223 is in a position to open the air intake of the first air extraction pipe 283, and the first air extraction pump is in a non-working state.
  • the second switching valve plate 224 when the first air inlet unit is connected to the outlet of the air inlet assembly 200, indicating that the first air inlet unit is providing process gas to the chamber body 100, the second switching valve plate 224 is in a rotating state.
  • the rotational plane of the second switching valve plate 224 is parallel to the plane where the outlet of the second air inlet pipe 282 is located, and is also parallel to the plane where the inlet of the second air extraction pipe 284 is located.
  • the air outlet of the second air inlet pipe 282 and the air inlet of the second air extraction pipe 284 both have three states: fully open, partially open and completely blocked.
  • the air inlet of the second air extraction pipe 284 When the air outlet of the second air inlet pipe 282 is fully open, the air inlet of the second air extraction pipe 284 is completely blocked; when the air outlet of the second air inlet pipe 282 is partially opened, the air inlet of the second air extraction pipe 284 is also partially opened, that is, partially blocked; when the air outlet of the second air inlet pipe 282 is completely blocked, the air inlet of the second air extraction pipe 284 is fully opened, and the second switching valve plate 224 rotates to continuously switch the air outlet of the second air inlet pipe 282 and the air inlet of the second air extraction pipe 284 between the three states of fully open, partially open and completely blocked.
  • the rotating second switching valve plate 224 when the first air intake unit is intake air, gradually opens the second air intake pipe 282 while gradually closing the second air extraction pipe 284, and vice versa, gradually closing the second air intake pipe 282 while gradually opening the second air extraction pipe 284.
  • This allows the second air extraction pipe 284 to draw residual gas from the second air intake pipe 282, thus preventing the residual gas in the second air intake pipe 282 from affecting the process.
  • the second switching valve plate 224 since the second switching valve plate 224 is in a rotating state, the pipes of the second air intake unit are prevented from being in a gas-holding state. This prevents hardware damage caused by prolonged gas-holding during a long single-step process.
  • the air inlet of the first air extraction pipe 283 and the air outlet of the first air inlet pipe 281 are both semicircular in structure, and the two are assembled into a circular structure.
  • the first switching valve plate 223 is also semicircular in structure. The first switching valve plate 223 rotates about the axis of the circular structure, and the air inlet of the first air extraction pipe 283 is aligned with the air outlet of the first air inlet pipe 281.
  • the first switching valve plate 223 can completely overlap with the air inlet of the first air extraction pipe 283 during rotation, thereby completely blocking the air inlet of the first air extraction pipe 283, or the first switching valve plate 223 can completely overlap with the air outlet of the first air inlet pipe 281, thereby completely blocking the air outlet of the first air inlet pipe 281, which helps to simplify the structure of the air intake assembly 200.
  • the air inlet of the first air extraction pipe 283 , the air outlet of the first air inlet pipe 281 and the first switching valve plate 223 may also adopt other structures such as a square structure.
  • the first air inlet unit further includes a third control valve 291 and a first pipe section 285b.
  • the first pipe section 285b is positioned opposite the air inlet of the first exhaust pipe 283 and the air outlet of the first air inlet pipe 281.
  • the third control valve 291 is disposed in the first pipe section 285b to control the on/off operation of the first pipe section 285b.
  • the third control valve 291 is located downstream of the first switching valve plate 223.
  • the third control valve 291 is open, ensuring smooth flow of the first process gas into the chamber body 100.
  • the third control valve 291 is closed, preventing the second process gas from mixing with the first process gas and entering the chamber body 100, potentially affecting the process.
  • the second switching valve plate 224 when the second air inlet unit is connected to the outlet of the air inlet assembly 200, the second switching valve plate 224 is in a position that blocks the air inlet of the second air extraction pipe 284, i.e., the second air extraction pipe 284 cannot extract air. In this embodiment, by blocking the second air extraction pipe 284, it is possible to prevent the second air extraction pipe 284 from extracting air from the chamber body 100, thereby preventing the process from being affected.
  • the second switching valve plate 224 is in a position to open the second air inlet pipe 282, and the second air inlet pipe 282 takes in air.
  • the second exhaust pipe 284 is blocked, the second exhaust pipe 284 is prevented from extracting the gas in the second air inlet pipe 282, thereby ensuring that the second process gas entering the second air inlet pipe 282 can smoothly enter the chamber body 100.
  • the air outlet of the second air extraction pipe 284 is connected to the second air extraction pump.
  • the second switching valve plate 224 is in a position to open the air intake of the second air extraction pipe 284, and the second air extraction pump is in a non-working state.
  • the first switching valve plate 223 when the second air inlet unit is connected to the outlet of the air inlet assembly 200, indicating that the second air inlet unit is providing process gas to the chamber body 100, the first switching valve plate 223 is in a rotating state.
  • the rotation plane of the first switching valve plate 223 is parallel to the plane where the outlet of the first air inlet pipe 281 is located, and is also parallel to the plane where the inlet of the first air extraction pipe 283 is located.
  • the air inlet of the first air extraction pipe 283 When the air outlet of the first air inlet pipe 281 is fully open, the air inlet of the first air extraction pipe 283 is completely blocked; when the air outlet of the first air inlet pipe 281 is partially opened, the air inlet of the first air extraction pipe 283 is also partially opened, that is, partially blocked; when the air outlet of the first air inlet pipe 281 is completely blocked, the air inlet of the first air extraction pipe 283 is fully opened, and the first switching valve plate 223 rotates to switch the air outlet of the first air inlet pipe 281 and the air inlet of the first air extraction pipe 283 between the three states of fully open, partially open and completely blocked.
  • the rotating first switching valve plate 223 when the second air intake unit is intake air, gradually opens the first air intake pipe 281 while gradually closing the first air extraction pipe 283, and vice versa, gradually closing the first air intake pipe 281 while gradually opening the first air extraction pipe 283.
  • This allows the first air extraction pipe 283 to draw residual gas from the first air intake pipe 281, thus preventing the residual gas in the first air intake pipe 281 from affecting the process.
  • the first switching valve plate 223 since the first switching valve plate 223 is in a rotating state, the pipes of the first air intake unit are prevented from being in a gas-holding state. This prevents hardware damage caused by prolonged gas-holding during a long single-step process.
  • the air inlet of the second air extraction pipe 284 and the air outlet of the second air intake pipe 282 are both semicircular in structure, and the two are assembled to form a circular structure.
  • the second switching valve plate 224 is also semicircular in structure. The second switching valve plate 224 rotates about the axis of the circular structure, and the air inlet of the second air extraction pipe 284 is aligned with the air outlet of the second air intake pipe 282.
  • the second switching valve plate 224 can completely overlap with the air inlet of the second air extraction pipe 284 during rotation, thereby completely blocking the air inlet of the second air extraction pipe 284, or the second switching valve plate 224 can completely overlap with the air outlet of the second air intake pipe 282, thereby completely blocking the air outlet of the second air intake pipe 282, which helps to simplify the structure of the air intake assembly 200.
  • the air inlet of the second air extraction pipe 284 , the air outlet of the second air inlet pipe 282 , and the second switching valve plate 224 may also adopt other structures such as a square structure.
  • the second air inlet unit further includes a fourth control valve 292 and a second pipe section 285c.
  • the second pipe section 285c is located opposite the air inlet of the second exhaust pipe 284 and the air outlet of the second air inlet pipe 282.
  • the fourth control valve 292 is disposed in the second pipe section 285c and controls the on/off operation of the second pipe section 285c. In the air inlet direction of the second air inlet pipe 282, the fourth control valve 292 is located downstream of the second switching valve plate 224.
  • the air inlet assembly 200 further includes an outlet pipe 285, which includes a main pipe 285a, a first pipe section 285b, and a second pipe section 285c, respectively, with the first pipe section 285b and the second pipe section 285c being in communication with the main pipe 285a.
  • an outlet pipe 285 which includes a main pipe 285a, a first pipe section 285b, and a second pipe section 285c, respectively, with the first pipe section 285b and the second pipe section 285c being in communication with the main pipe 285a.
  • the third control valve 291 when the first process is started, the third control valve 291 is in the open state, the first switching valve plate 223 is connected to the first air inlet pipe 281, and the first switching valve plate 223 cuts off the first air extraction pipe 283, and the first gas enters the chamber body to perform, for example, an etching step.
  • the fourth control valve 292 is in the closed state, and the second switching valve plate 224 rotates to quickly switch the air intake process and the air extraction process to avoid the pipeline of the second air intake unit being in a holding state; when the second process is started, the third control valve 291 is in the closed state, and the first switching valve plate 223 rotates to quickly switch the air intake process and the air extraction process to avoid the pipeline of the first air intake unit being in a holding state.
  • the fourth control valve 292 is in the open state, the second switching valve plate 224 is connected to the second air inlet pipe 282, and the second switching valve plate 224 cuts off the second air extraction pipe 284, and the second gas enters the chamber body to perform, for example, a deposition step.
  • the present application also discloses a semiconductor process chamber.
  • the semiconductor process chamber includes a chamber body 100 and the gas inlet assembly 200 in the above embodiment.
  • the chamber body 100 is provided with a gas inlet 101, and the gas inlet assembly 200 is disposed at the gas inlet 101.
  • the main channel 285a of the gas outlet pipe 285 is connected to the gas inlet 101 of the chamber body 100.
  • the semiconductor process chamber through the gas inlet assembly 200, prevents residual process gas from the previous process from entering the chamber body 100 and mixing with the process gas of the next process to participate in the next process, which is beneficial to improving the process effect.
  • the embodiment of the present application further discloses a semiconductor process method, which includes a first process step and a second process step.
  • First process step Controlling the connection between the first air inlet unit and the outlet of the air inlet assembly 200, the first switching valve plate 223 is in a position blocking the air inlet of the first air extraction pipe 283, and the second switching valve plate 224 is in a rotating state. Specifically, at this time, the first switching valve plate 223 is also in a position opening the first air inlet pipe 281, allowing the first process gas to flow into the chamber body 100. Furthermore, through the rotating second switching valve plate 224, the second air extraction pipe 284 can draw residual gas from the second air inlet unit.
  • Second process step Control the communication between the second air inlet unit and the outlet of the air inlet assembly 200, so that the second switching valve plate 224 is in a position blocking the air inlet of the second air extraction pipe 284, and the first switching valve plate 223 is in a rotating state. Specifically, at this time, the second switching valve plate 224 is also in a position to open the second air inlet pipe 282, allowing the second process gas to flow into the chamber body 100. Furthermore, through the rotating first switching valve plate 223, the first air extraction pipe 283 can draw residual gas from the first air inlet unit.
  • the first process gas may be an etching gas
  • the second process gas may be a deposition gas
  • the first process step is an etching step
  • the second process step is a deposition step
  • the semiconductor process method is the Bosch process, which includes multiple cyclic processes, and each cyclic process includes the above-mentioned deposition step and etching step.
  • the exhaust pipe is used for exhaust, which effectively prevents the residual gas from the previous process from entering the chamber body 100 and participating in the next process, and prevents the two process gases from mixing and participating in the process, which is beneficial to improving the process effect.

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Abstract

本申请公开一种进气组件、半导体工艺腔室及半导体工艺方法,属于半导体技术领域。进气组件包括相连的进气窗和切换阀板,进气窗设有第一气体进气口和第二气体进气口,切换阀板可相对于进气窗在第一位置和第二位置之间运动,且切换阀板设有气路,气路与进气组件的出气端连通;在切换阀板位于第一位置的情况下,第一气体进气口与气路连通且第二气体进气口与气路断开;在切换阀板位于第二位置的情况下,第二气体进气口与气路连通且第一气体进气口与气路断开。如此,通过调节切换阀板的位置,可直接在进气窗的位置截断上一工艺的气体,避免上一工艺的残留气体参与下一工艺过程,有利于提升工艺效果。

Description

进气组件、半导体工艺腔室及半导体工艺方法 技术领域
本申请属于半导体技术领域,具体涉及一种进气组件、半导体工艺腔室及半导体工艺方法。
背景技术
在半导体工艺领域,Bosch工艺是指在集成电路制造中为了阻止或者减弱侧向刻蚀,在刻蚀的侧向边缘沉积一层薄膜的工艺,主要由氟基气体主导的刻蚀步骤和碳氟气体主导的沉积步骤切换组成。
现有技术中,半导体工艺腔室包括腔室本体、沉积气体供气装置和刻蚀气体供气装置,沉积气体供气装置通过第一管路连通腔室本体的内部,刻蚀气体供气装置通过第二管路连通腔室本体的内部,第一管路和第二管路均设有控制阀,并利用控制阀控制第一管路和第二管路的通断,进而控制沉积气体或者刻蚀气体进入腔室本体内,实现刻蚀过程和沉积过程的切换过程。
在控制阀控制第一管路导通、第二管路截断的情况下,沉积气体进入腔室本体内,刻蚀气体被截断,但是,第二管路中残留的部分刻蚀气体也会进入腔室本体内,进而与沉积气体混合并参与工艺过程;同样地,在控制阀控制第一管路截断、第二管路导通的情况下,沉积气体被截断,刻蚀气体进入腔室本体内,但是,第一管路中残留的部分沉积气体也会进入腔室本体内,进而与刻蚀气体混合并参与工艺过程,因此,在切换气体时,上一工艺过程中残留的工艺气体参与下一工艺过程,会使得刻蚀的侧壁产生不光滑的扇贝结构,粗糙的侧壁会对后续工艺产生影响,进而造成器件的良率下降。
发明内容
本申请实施例的目的是提供一种进气组件、半导体工艺腔室及半导体工艺方法,能够解决相关技术中进气组件在切换气体过程中存在残余气体影响工艺效果的问题。
第一方面,本申请实施例提供一种进气组件,包括相连的进气窗和切换阀板,所述进气窗设有第一气体进气口和第二气体进气口,所述切换阀板可相对于所述进气窗在第一位置和第二位置之间运动,且所述切换阀板设有气路,所述气路与所述进气组件的出气端连通;
在所述切换阀板位于所述第一位置的情况下,所述第一气体进气口与所述气路连通且所述第二气体进气口与所述气路断开;在所述切换阀板位于所述第二位置的情况下,所述第二气体进气口与所述气路连通且所述第一气体进气口与所述气路断开。
第二方面,本申请实施例还提供一种进气组件,包括第一进气单元和第二进气单元,
所述第一进气单元包括第一进气管、第一抽气管和第一切换阀板,所述第一抽气管的进气口和所述第一进气管的出气口并排设置,所述第一切换阀板可转动地设置于所述第一抽气管的进气口和所述第一进气管的出气口;
所述第二进气单元包括第二进气管、第二抽气管和第二切换阀板,所述第二抽气管的进气口和所述第二进气管的出气口并排设置,所述第二切换阀板可转动地设置于所述第二抽气管的进气口和所述第二进气管的出气口;
所述第一进气单元和所述第二进气单元交替与所述进气组件的出气端连通。
第三方面,本申请实施例还提供一种半导体工艺腔室,包括腔室本体以及上述的进气组件,所述进气组件的出气端与所述腔室本体连通。
第四方面,本申请实施例还提供一种半导体工艺方法,应用于上述第一方面中的进气组件,所述方法包括:
第一工艺步骤,控制切换阀板运动至第一位置,使第一气体通过第一气体进气口进入腔室本体内;
第二工艺步骤,控制所述切换阀板运动至第二位置,使第二气体通过第二气体进气口进入所述腔室本体内;
交替进行所述第一工艺步骤和第二工艺步骤。
第五方面,本申请实施例还提供一种半导体工艺方法,应用于上述第二方面中的进气组件,所述方法包括:
第一工艺步骤,控制所述第一进气单元与所述进气组件的出气端连通,使第一切换阀板处于封堵第一抽气管的进气口的位置,第二切换阀板处于转动状态;
第二工艺步骤,控制所述第二进气单元与所述进气组件的出气端连通,使第二切换阀板处于封堵第二抽气管的进气口的位置,第一切换阀板处于转动状态。
在本申请实施例中,在进气组件包括进气窗和切换阀板的方案中,通过改变切换阀板相对于进气窗的位置,能够实现第一气体进气口与进气组件的出气端连通,或者实现第二气体进气口与进气组件的出气端连通,而进气组件的出气端始终与腔室本体连通。由于进气窗位于腔室本体的顶部紧邻腔室本体,在进气窗的位置切换阀板直接截断上一工艺气体,有效避免上一工艺过程残留的气体进入腔室本体内并参与下一工艺过程,避免两种工艺气体混合参与工艺过程,有利于提升工艺效果。而且,由于切换阀板紧邻腔室本体设置,工艺气体进入腔室本体的速度较快,避免了工艺气体在管路中流通导致进气延迟的问题,进气延迟时间有效缩短,那么在两种工艺过程中腔室本体的控压过程也会比较快速准确,进而使得两种工艺过程中腔室本体的压差值更容易控制,有利于提升工艺效果。
在进气组件包括第一进气单元和第二进气单元的方案中,第一进气单元和第二进气单元交替与进气组件的出气端连通,在第一进气单元与进气组件的出气端连通的情况下,第二切换阀板可转动至开启第二抽气管的位置,第二抽气管对第二进气管抽气,即将第二进气管内的工艺气体抽走,避免残留的工艺气体进入腔室本体内与下一工艺过程的工艺气体混合参与下一工艺过程;同样地,在第二进气单元与进气组件的出气端连通的情况下,第一切换阀板可转动至开启第一抽气管的位置,第一抽气管对第一进气管抽气,即将第一进气管内的工艺气体抽走,避免残留的工艺气体进入腔室本体内与下一工艺过程的工艺气体混合参与下一工艺过程,有利于提升工艺效果,进而有利于提高器件的良率。
附图说明
图1是本申请实施例公开的半导体工艺腔室的结构示意图;
图2是本申请一实施例公开的进气组件的结构示意图;
图3是本申请一实施例公开的在切换阀板处于第一位置的情况下进气组件的剖视图;
图4是本申请一实施例公开的在切换阀板处于第二位置的情况下进气组件的剖视图;
图5是本申请一实施例公开的匀流板的俯视图;
图6是本申请一实施例公开的匀流板的局部示意图;
图7是本申请实施例公开的在排气口处于关闭状态的情况下压力控制阀的结构示意图;
图8是本申请实施例公开的在排气口处于开启状态的情况下压力控制阀的动作示意图;
图9是本申请实施例公开的半导体工艺方法的流程图;
图10是本申请实施例公开的半导体工艺方法的时序图;
图11是本申请另一实施例公开的半导体工艺腔室的结构示意图;
图12是本申请另一实施例公开的进气组件的结构示意图;
图13是本申请另一实施例公开的第一转动阀板的动作示意图。
附图标记说明:
100-腔室本体、101-进气口、110-基座、111-晶片、120-内衬、
200-进气组件、210-进气窗、211-第一气体进气口、212-第二气体进气
口、220-切换阀板、221-第一气路段、222-第二气路段、231-第一封堵件、232-第二封堵件、241-第一挡件、242-第二挡件、251-第一固定件、252-第二固定件、260-匀流板、261-匀流槽、262-匀流孔、271-第一密封件、272-第二密封件、273-第三密封件、
223-第一切换阀板、224-第二切换阀板、
281-第一进气管、282-第二进气管、283-第一抽气管、284-第二抽气管、
285-出气管、285a-主管路、285b-第一管段、285c-第二管段、
291-第三控制阀、292-第四控制阀、
300-真空泵、310-分子泵、320-干泵、
400-压力控制阀、410-阀板、420-驱动件、
510-第一气体流量控制器、520-第一抽气管路、530-第一控制阀、531-
第一针阀、532-第一气动截止阀、
610-第二气体流量控制器、620-第二抽气管路、630-第二控制阀、631-
第二针阀、632-第二气动截止阀。
具体实施方式
下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚地描述,显然,所描述的实施例是本申请一部分实施例,而不是全部的实施例。基于本申请中的实施例,本领域普通技术人员获得的所有其他实施例,都属于本申请保护的范围。
本申请的说明书和权利要求书中的术语“第一”、“第二”等是用于区别类似的对象,而不用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换,以便本申请的实施例能够以除了在这里图示或描述的那些以外的顺序实施,且“第一”、“第二”等所区分的对象通常为一类,并不限定对象的个数,例如第一对象可以是一个,也可以是多个。此外,说明书以及权利要求中“和/或”表示所连接对象的至少其中之一,字符“/”,一般表示前后关联对象是一种“或”的关系。
下面结合附图,通过具体的实施例及其应用场景对本申请实施例提供的进气组件、半导体工艺腔室及半导体工艺方法进行详细地说明。
在本申请的一些实施例中,参考图1和图2所示,进气组件200可以包括进气窗210和切换阀板220,进气窗210用于通入不同的气体,切换阀板220用于切换气体,使气体流向进气组件200的出气端。示例性的,进气窗210中通入的气体可以是不同的工艺气体,例如:沉积气体、刻蚀气体。换言之,进气窗210用于通入沉积气体、刻蚀气体,而切换阀板220则用于切换沉积气体或刻蚀气体流向进气组件200的出气端。更具体地,进气组件200向腔室本体100交替通入沉积气体和刻蚀气体,以实现Bosch工艺。
如图2所示,切换阀板220与进气窗210相对且紧邻进气窗210设置,进气窗210设有第一气体进气口211和第二气体进气口212,示例性的,第一气体进气口211用于通入刻蚀气体,第二气体进气口212用于通入沉积气体,当然,第一气体进气口211和第二气体进气口212也可以分别通入其他不同种类的工艺气体。
在如图1所示的实施例中,第一气体进气口211可以与外部的第一气体流量控制器510连通,第二气体进气口212可以与外部的第二气体流量控制器610连通。
如图2至图4所示,切换阀板220与进气窗210相连,切换阀板220用于控制第一气体进气口211和第二气体进气口212是否与进气组件200的出气端连通。切换阀板220相对于进气窗210可运动,在一些实施例中,切换阀板220可以相对于进气窗210可移动,可以利用手动或者移动驱动件驱动切换阀板220移动,示例性的,移动驱动件可以为直线模组、气缸等线性驱动件;而在另一些实施例中,切换阀板220还可以相对于进气窗210可转动,切换阀板220在自身所在的平面内转动,以使气路与第一气体进气口211或者第二气体进气口212连通,可以利用手动或者驱动源驱动切换阀板220转动,示例性的,驱动源可以为电机、气动马达等提供旋转动力的驱动源。
切换阀板220可相对于进气窗210在第一位置和第二位置之间运动,切换阀板220设有气路,气路与进气组件200的出气端连通,在切换阀板位于第一位置的情况下,第一气体进气口211与气路连通,第二气体进气口212与气路断开,此时第一气体通过进气组件200进入腔室本体100内,从而开启第一工艺过程;在切换阀板220位于第二位置的情况下,第二气体进气口212与气路连通,第一气体进气口211与气路断开,此时第二气体通过进气组件200进入腔室本体100内,从而开启第二工艺过程。示例性的,第一气体进气口211通入的第一气体为刻蚀气体,第一工艺过程为刻蚀过程;第二气体进气口212通入的第二气体为沉积气体,第二工艺过程为沉积过程。如此,切换阀板220仅需运动较小的距离,使其上的气路与第一气体进气口211对应连通或者与第二气体进气口212对应连通,即可切换第一气体和第二气体。
也就是说,通过改变切换阀板220的运动位置,能够使位于第一气体进气口211处的第一气体或者位于第二气体进气口212处的第二气体通过进气组件200快速进入腔室本体100内。
在现有技术中,控制阀与腔室本体的距离较远,因此,控制阀在在切换气体时,控制阀与腔室本体之间的管路中依然存在大量的上一工艺过程的工艺气体,并随着下一工艺过程进入腔室本体内参与下一工艺过程,从而使得刻蚀的侧壁产生不光滑的扇贝结构。
而本实施例通过改变切换阀板220的位置,能够实现第一气体进气口211与进气组件200的出气端连通,或者实现第二气体进气口212与进气组件200的出气端连通,而进气组件200的出气端始终与腔室本体100连通。由于进气窗210位于腔室本体100的顶部,在进气窗210的位置切换阀板220直接截断上一工艺气体,换言之,通过将切换阀板220设置在进气窗210的位置,极大地缩小了切换阀板220与腔室本体100之间的距离,从而使切换阀板220与腔室本体100之间可以留存上一工艺过程中残留气体的空间缩小到几乎可以忽略不计,有效避免上一工艺过程残留的气体进入腔室本体100内并参与下一工艺过程,从而避免两种工艺气体混合参与工艺过程,有利于提升工艺效果。而且,由于切换阀板220紧邻腔室本体100设置,工艺气体进入腔室本体100的速度较快,避免了工艺气体在管路中流通导致进气延迟的问题,进气延迟时间有效缩短,那么在两种工艺过程中腔室本体100的控压过程也会比较快速准确,进而使得两种工艺过程中腔室本体100的压差值更容易控制。
在一些实施例中,第一气体进气口211用于通入刻蚀气体,第二气体进气口212用于通入沉积气体,两种工艺过程分别为刻蚀过程和沉积过程。本实施例中的进气组件200利用可以用于Bosch刻蚀工艺,刻蚀过程和沉积过程的快速切换能够有效避免刻蚀所得到的深孔的侧壁产生不光滑的扇贝结构,使得深孔的侧壁更加光滑,避免对后续工艺产生影响,有利于提高器件的良率。
在另一些实施例中,参考图2所示,第一气体进气口211和第二气体进气口212成对设置,在进气窗210的周向上,间隔设置有多对第一气体进气口211和第二气体进气口212,在图2的示例中,示例性的示出了6对第一气体进气口211和第二气体进气口212,本领域技术人员可以理解,更多或更少对第一气体进气口211和第二气体进气口212也是可行的。相应地,气路间隔设置多个,各气路分别与各对第一气体进气口211和第二气体进气口212相对应。采用本实施例,通过多对第二气体进气口212和第一气体进气口211,实现多个第二气体进气口212同时进气或者多个第一气体进气口211同时进气,在提高进气效率和工艺效率的基础上,增大出气面积,有利于提升进气均匀性。
示例性的,进气窗210可以为圆形结构,第二气体进气口212和第一气体进气口211可以开设于进气窗210的周面上,但是这并不是限制性的,在一些其他实施例中,第二气体进气口212和第一气体进气口211也可以开设于进气窗210的上端面,本申请实施例对第二气体进气口212和第一气体进气口211的开设位置不做限制。
在本实施例中,在进气窗210的周向上,间隔设置有例如六对第二气体进气口212和第一气体进气口211,气路间隔设置例如六个,各气路分别与各对第二气体进气口212和第一气体进气口211相对应。
当然,在其他实施例中,进气窗210也可以设置一个第一气体进气口211和一个第二气体进气口212。
在图1-图4所示的实施例中,进气组件200还包括封堵件,封堵件设置于进气窗210和切换阀板220之间,气路包括第一气路段221和第二气路段222,第一气路段221的出口端与第二气路段222的出口端分别与进气组件200的出气端连通,封堵件根据切换阀板220的运动位置选择性封堵第一气路段221或者第二气路段222。示例性的,封堵件可以为弹性结构,也可以为硬质结构,本申请实施例对封堵件的结构不做具体限制。
参考图3所示,在切换阀板220位于第一位置的情况下,第一气体进气口211与第一气路段221的进口端连通,封堵件封堵第二气路段222的进口端,以使第二气体进气口212无法与第二气路段222连通,参考图4所示,在切换阀板220位于第二位置的情况下,第二气体进气口212与第二气路段222的进口端连通,封堵件封堵第一气路段221的进口端,以使第一气体进气口211无法与第一气路段221连通。
也就是说,第一气路段221和第二气路段222均具有进口端和出口端,第一气路段221的出口端、第二气路段222的出口端分别与进气组件200的出气端连通;而在切换阀板220位于如图3所示的第一位置的情况下,第一气体进气口211与第一气路段221的进口端连通,封堵件封堵第二气路段222的进口端;而在切换阀板220位于如图4所示的第二位置的情况下,第二气体进气口212与第二气路段222的进口端连通,封堵件封堵第一气路段221的进口端。
示例性的,在切换阀板220位于第一位置的情况下,第一气体进气口211与第一气路段221相对,第二气体进气口212与第二气路段222错开;在切换阀板220位于第二位置的情况下,第一气体进气口211与第一气路段221错开,第二气体进气口212与第二气路段222相对。
根据切换阀板220的运动位置,封堵件直接封堵第一气路段221或者第二气路段222,实现控制第一气体进气口211与第一气路段221的通断以及第二气体进气口212与第二气路段222的通断,避免在第一气体进气口211与第一气路段221未连通的情况下部分第一气体流入第一气路段221,也避免在第二气体进气口212与第二气路段222未连通的情况下部分第二气体流入第二气路段222,有利于提高工艺过程中对气体的隔绝效果。
而且,利用封堵件封堵对应的气路段,在第一气体和第二气体中的一者流向进气组件200的出气端的同时,另一者处于憋气状态,那么,处于憋气状态的气体对应的气路段的气压逐渐上升,待切换阀板220运动使该气体被释放时,气体会更快流入对应的气路段,有利于提高气体切换速度,进而提升工艺效果。
当然,在其他实施例中,进气组件200可以不设置封堵件,在切换阀板220位于第一位置的情况下,切换阀板220直接遮挡第二气体进气口212,使得第二气体进气口212与气路未连通;在切换阀板220位于第二位置的情况下,切换阀板220直接遮挡第一气体进气口211,使得第一气体进气口211与气路未连通。
在一些实施例中,封堵件的数量为一个,封堵件相对于进气窗210的位置固定,在切换阀板220位于第一位置的情况下,该封堵件封堵第二气路段222,防止第二气体通过气路进入腔室本体100;在切换阀板220位于第二位置的情况下,该封堵件封堵第一气路段221,防止第一气体通过气路进入腔室本体100。
在另一种实施例中,封堵件的数量为至少两个,其中包括第一封堵件231和第二封堵件232,第一封堵件231设置于第一气路段221的进口端,第二封堵件232设置于第二气路段222的进口端,封堵件为弹性结构,第一封堵件231和第二封堵件232相对于进气窗210的位置固定,在切换阀板220运动的过程中,第一封堵件231和第二封堵件232能够产生弹性形变,从而改变第一封堵件231和第二封堵件232的形状,而第一封堵件231的形变状态决定第一封堵件231是否封堵第一气路段221,同样地,第二封堵件232的形变状态决定第二封堵件232是否封堵第二气路段222。
在切换阀板220位于第一位置的情况下,如图3所示,第一封堵件231处于弹性形变状态,第一封堵件231的形状改变,第一封堵件231不再封堵第一气路段221,以使第一气体进气口211与第一气路段221的进口端连通,第二封堵件232封堵第二气路段222的进口端。在切换阀板220位于第二位置的情况下,如图4所示,第二封堵件232处于弹性形变状态,第二封堵件232的形状改变,第二封堵件232不再封堵第二气路段222,以使第二气体进气口212与第二气路段222的进口端连通,第一封堵件231封堵第一气路段221的进口端。
在一些实施例中,在切换阀板220位于第一位置的情况下,如图3所示,第一封堵件231处于压缩状态,故第一封堵件231的体积较小,第一封堵件231不会封堵第一气路段221的进口端,同时,第二封堵件232未产生弹性形变,即第二封堵件232处于舒张状态,第二封堵件232的体积较大,故第二封堵件232直接封堵第二气路段222的进口端;在切换阀板220位于第二位置的情况下,如图4所示,第一封堵件231未产生弹性形变,即第一封堵件231处于舒张状态,第一封堵件231的体积较大,故第一封堵件231直接封堵第一气路段221的进口端,同时,第二封堵件232处于压缩状态,第二封堵件232的体积较小,故第二封堵件232不会封堵第二气路段222的进口端。
采用本实施例,设置至少两个具有弹性的封堵件,通过封堵件是否产生弹性形变来决定是否封堵对应的气路段,产生弹性形变的封堵件的封堵效果更好,密封性能得到提升。
在在另一些实施例中,进气组件200还包括第一挡件241和第一固定件251,第一挡件241和第一固定件251分别位于第一封堵件231的两侧,第一挡件241与进气窗210相连,第一固定件251与切换阀板220相连,在切换阀板220由第二位置切换至第一位置的过程中,第一挡件241与第一固定件251之间的距离发生变化,而第一封堵件231位于二者之间,故第一挡件241和第一固定件251挤压第一封堵件231,以使第一封堵件231产生弹性形变。其中,第一挡件241和第一固定件251均可以为块状结构,当然,也可以为其他结构,本申请实施例对第一挡件241和第一固定件251的结构不做限制。
示例性的,第一挡件241与进气窗210可以通过焊接、粘接等方式固定相连,第一挡件241相对于进气窗210的位置固定;第一固定件251与切换阀板220也可通过焊接、粘接等方式固定相连,实现第一固定件251与切换阀板220相对固定,第一固定件251跟随切换阀板220运动。
采用本实施例,直接利用第一挡件241和第一固定件251是否挤压第一封堵件231来控制第一封堵件231是否产生弹性形变,也即,通过切换阀板220的运动位置来直接控制第一封堵件231是否产生弹性形变,如此,通过机械结构,有利于准确改变第一封堵件231的形变状态,避免采用电控等方式因断电等异常情况导致第一封堵件231无法准确封堵第一气路段221。
当然,在其他实施例中,第一封堵件231可以为电致形变元件,通过第一封堵件231是否通电来控制第一封堵件231是否产生弹性形变;或者,第一封堵件231可以为温致形变元件,通过对第一封堵件231是否进行加热来控制第一封堵件231是否产生弹性形变。
在一些实施例中,进气组件200还包括第二挡件242和第二固定件252,第二挡件242和第二固定件252分别位于第二封堵件232的两侧,第二挡件242与进气窗210相连,第二固定件252与切换阀板220相连,在切换阀板220由第一位置切换至第二位置的过程中,第二挡件242与第二固定件252之间的距离发生变化,而第二封堵件232位于二者之间,故第二挡件242和第二固定件252挤压第二封堵件232,以使第二封堵件232产生弹性形变。其中,第二挡件242和第二固定件252均可以为块状结构,当然,也可以为其他结构,本申请实施例对第二挡件242和第二固定件252的结构不做限制。
示例性的,第二挡件242与进气窗210可以通过焊接、粘接等方式固定相连,第二挡件242相对于进气窗210的位置固定;第二固定件252与切换阀板220也可通过焊接、粘接等方式固定相连,实现第二固定件252与切换阀板220相对固定,第二固定件252跟随切换阀板220运动。
采用本实施例,直接利用第二挡件242和第二固定件252是否挤压第二封堵件232来控制第二封堵件232是否产生弹性形变,也即,通过切换阀板220的运动位置来直接控制第二封堵件232是否产生弹性形变,如此,通过机械结构,有利于准确改变第二封堵件232的形变状态,避免采用电控等方式因断电等异常情况导致第二封堵件232无法准确封堵第二气路段222。
当然,在其他实施例中,第二封堵件232可以为电致形变元件,通过第二封堵件232是否通电来控制第二封堵件232是否产生弹性形变;或者,第二封堵件232可以为温致形变元件,通过对第二封堵件232是否进行加热来控制第二封堵件232是否产生弹性形变。
综上所述,参考图3和图4所示,在切换阀板220由第二位置运动至第一位置的过程中,第一挡件241与第一固定件251之间的距离减小,第一封堵件231被压缩,故第一封堵件231无法封堵第一气路段221,而第二挡件242与第二固定件252之间的距离增大,第二封堵件232未被压缩,第二封堵件232封堵第二气路段222,第一气体进气口211通过第一气路段221与腔室本体100连通,腔室本体100内可以开启第一工艺过程;在切换阀板220由第一位置运动至第二位置的过程中,第一挡件241与第一固定件251之间的距离增大,第一封堵件231未被压缩,故第一封堵件231封堵第一气路段221,而第二挡件242与第二固定件252之间的距离减小,第二封堵件232被压缩,第二封堵件232无法封堵第二气路段222,第二气体进气口212通过第二气路段222与腔室本体100连通,腔室本体100内可以开启第二工艺过程。
在一些实施例中,参考图3和图4所示,进气组件200还包括第一密封件271,第一密封件271设置于切换阀板220和进气窗210之间;且第一密封件271位于第二气体进气口212和第一气体进气口211之间,以隔离第二气体进气口212和第一气体进气口211。其中,第一密封件271可以为密封圈或者密封条等密封结构,也可以为其他密封结构。
示例性的,切换阀板220可以设置开槽,第一气体进气口211和第二气体进气口212可以通过开槽与气路连通,第一密封件271设置于开槽内,且第一密封件271为条状结构,第一密封件271的两端分别抵于开槽的槽壁面,将开槽分割为两部分,这两部分分别与第一气体进气口211和第二气体进气口212连通,从而密封隔离开第二气体进气口212和第一气体进气口211。
采用本实施例,利用第一密封件271将第二气体进气口212与第一气体进气口211隔离开,避免第一气体进气口211与第二气体进气口212之间串气,有利于提升进气组件200的密封性能。
在一些实施例中,进气组件200还包括第二密封件272,第二密封件272设置于进气窗210和切换阀板220之间,以密封进气窗210和切换阀板220之间的间隙。示例性的,第二密封件272可以为密封圈,密封圈环绕第一气体进气口211和第二气体进气口212设置,如图3所示,密封圈环绕在第一气体进气口211靠近第一气路段221的一端和第二气体进气口212靠近第二气路段222的一端,换言之,密封圈环也同时绕第一气路段221和第二气路段222,从而可以防止气体自进气窗210和切换阀板220之间的间隙泄漏。当然,第二密封件272也可以为其他密封结构。在进一步地实施例中,进气窗210朝向切换阀板220的一侧设有第二密封槽,第二密封件272设置于第二密封槽内。
采用本实施例,利用第二密封件272密封进气窗210和切换阀板220之间的间隙,避免第一气体和第二气体通过进气窗210和切换阀板220之间的间隙流出,有利于提升密封性能。
当然,在一些其他实施例中,进气组件200可以不设置第一密封件271和第二密封件272,可以通过增大切换阀板220与进气窗210之间的接触紧密性来提高密封性能,避免串气和漏气。
在本申请的方案中,参考图2-图6所示,进气组件200还包括:匀流板260,匀流板260位于切换阀板220背向进气窗210的一侧,匀流板260设有多个匀流孔262,气路通过各匀流孔262与进气组件200的出气端连通。
采用本实施例,利用匀流板260上的匀流孔262,将流入切换阀板220的第一气体或者第二气体进行分流,使第一气体或者第二气体比较均匀地流出,有利于提升工艺均匀性。
当然,在一些其他实施例中,进气组件200可以不设置匀流板260,切换阀板220的气路直接与进气组件200的出口端连通。
在一些实施例中,匀流板260上的匀流孔262直接与气路连通。
在另一些实施例中,匀流板260还设有匀流槽261,匀流槽261与切换阀板220形成匀流空间,匀流槽261连通多个匀流孔262和气路,即气路通过匀流槽261和匀流孔262与进气组件200的出气端连通。示例性的,匀流槽261可以为圆形槽,也可以为其他形状的槽,能够与各匀流孔262连通即可。采用本实施例,工艺气体由第一气体进气口211或第二气体进气口212进入匀流孔262之前,先通过匀流槽261进行扩散和混合,进一步再通过各匀流孔262进行匀气,有利于提升匀流板260的匀流性能。
在第二气体进气口212和第一气体进气口211均设置多个的实施例中,参考图5和图6所示,匀流板260沿自身的周向设有多个匀流区域,每个匀流区域分别设有一个匀流槽261和多个匀流孔262,匀流槽261与第一气体进气口211和第二气体进气口212一一对应,换言之,在第一气体进气口211和第二气体进气口212为多组的情况下,同一组的第一气体进气口211和第二气体进气口212与一个匀流槽261相对应。
在一些实施例中,进气组件200还包括:第三密封件273,第三密封件273设置于匀流板260和切换阀板220之间,以密封匀流板260和切换阀板220之间的间隙。示例性的,第三密封件273可以为密封圈,也可以为其他密封结构;匀流板260的每个匀流区域的外部均设有一个第三密封件273,在进一步的实施例中,匀流板260的每个匀流区域均设有第三密封槽,第三密封件273设置于第三密封槽内。
采用本实施例,利用第三密封件273密封匀流板260和切换阀板220之间的间隙,避免第一气体和第二气体通过二者之间的间隙流出,有利于进一步提升密封性能。
当然,在其他实施例中,进气组件200可以不设置第三密封件273,可以通过增大切换阀板220与匀流板260之间的接触紧密性来提高密封性能,避免串气和漏气。
基于本申请公开的进气组件200,本申请实施例还公开一种半导体工艺腔室,参考图1所示,半导体工艺腔室包括腔室本体100和上述实施例中的进气组件200,腔室本体100为半导体工艺过程提供场所,腔室本体100的内部为真空环境;进气组件200的出气端与腔室本体100连通,进气组件200用于向腔室本体100内提供工艺气体。示例性的,腔室本体100设有进气口101,进气组件200设置于进气口101处,在进一步的实施例中,进气窗210位于进气口101处,进气窗210用于封闭进气口101。
在本实施例中,半导体工艺腔室可应用于Bosch工艺,工艺气体包括刻蚀气体和沉积气体,刻蚀气体可以为氟基气体,沉积气体可以为碳基气体。
半导体工艺腔室利用上述的进气组件200,能够实现第一气体和第二气体的快速切换,避免腔室本体100进气延迟的问题,有利于准确控制不同工艺过程中腔室本体100的压差值,该半导体工艺腔室例如可以用于执行Bosch刻蚀工艺以刻蚀得到高深宽比孔,由于刻蚀与沉积气体能够实现快速切换,刻蚀得到的孔侧壁更加光滑,有利于提高器件的良率。
示例性的,如图1所示,腔室本体100内设有基座110,基座110用于承载晶片111,晶片111可以为硅片,基座110的外周设有内衬120,通过设置内衬120防止工艺气体污染腔室本体100的内壁或者腔室本体100内的其他器件。
在本申请的方案中,参考图1所示,腔室本体100设有排气口,半导体工艺腔室还包括压力控制阀400,压力控制阀400设置于排气口处,以调节排气口的开度。其中,压力控制阀400可以为电磁阀、蝶阀、球阀等能够起到开关和调节效果的阀体,本申请实施例对压力控制阀400的种类不做限制。如此,通过调节压力控制阀400,使完成工艺过程的第一气体或者第二气体通过排气口排出至腔室本体100之外,便于腔室本体100进行下一工艺步骤,实现不同工艺过程的快速切换。
在一些实施例中,半导体工艺腔室还包括:真空泵300,真空泵300的进口端与排气口连通,利用真空泵300提供抽吸动力;真空泵300的数量为至少两个,其中包括干泵320和分子泵310,分子泵310的进口端与排气口直接连通,干泵320的进口端与分子泵310的出口端直接连通,分子泵310适用于在高真空环境下进行抽气,干泵320适用于在较低真空环境下进行抽气。
在一些实施例中,压力控制阀400包括一个阀板410和驱动件420,驱动件420与阀板410相连,驱动件420驱动该阀板410转动,以增大或减小排气口的开度。示例性的,驱动件420可以为电机、气动马达等能够产生旋转动力的驱动源。
在另一些实施例中,参考图7和图8所示,压力控制阀400包括至少两个阀板410和驱动件420,各阀板410均可转动地设置于排气口处,以开启或关闭排气口,驱动件420分别与各阀板410相连,驱动件420可驱动各阀板410同时转动,各阀板410通过转动相互远离或靠近,以增大或减小排气口的开度。示例性的,驱动件420的数量为至少两个,驱动件420与阀板410一一对应,各驱动件420分别驱动对应的阀板410转动,从而使各阀板410相互远离或靠近。
在调节排气口开度的过程中,至少两个阀板410同时动作,与前一实施例相比,每个阀板410的转动行程减小,即每个阀板410的转动角度减小,故驱动件420的驱动时间缩短,压力控制阀400的动作时间缩短,实现真空泵300快速抽气,进一步提高刻蚀过程与沉积过程的切换效率。
在图1所示的实施例中,半导体工艺腔室还包括第一气体流量控制器510和第一抽气管路520,第一抽气管路520的第一端以及第一气体进气口211分别与第一气体流量控制器510的出口端连通,第一抽气管路520的第二端与真空泵300的进口端连通。示例性的,第一气体进气口211通过第一管路与第一气体流量控制器510的出口端连通,第一气体流量控制器510控制进入第一气体进气口211的第一气体流量,第一抽气管路520的第一端与第一管路直接连通,第一抽气管路520的第二端连通干泵320的进口端。
第一抽气管路520设有第一控制阀530。示例性的,第一控制阀530包括第一针阀531和第一气动截止阀532,第一针阀531和第一气动截止阀532间隔设置于第一抽气管路520,如此,通过第一气动截止阀532控制第一抽气管路520的通断,通过第一针阀531可以精确调节第一抽气管路520的气流量。
采用本实施例,在第一气体进气口211与第一气体流量控制器510之间出现异常,第一气体进气口211无法正常进气的情况下,利用第一控制阀530导通第一抽气管路520,使第一气体由第一抽气管路520进入真空泵300,避免因憋气导致气压过大。
在一些实施例中,半导体工艺腔室还包括第二气体流量控制器610和第二抽气管路620,第二抽气管路620的第一端以及第二气体进气口212分别与第二气体流量控制器610的出口端连通,第二抽气管路620的第二端与真空泵300的进口端连通。示例性的,第二气体流量控制器610通过第二管路与第二气体流量控制器610的出口端连通,第二气体流量控制器610控制进入第二气体进气口212的第二气体流量,第二抽气管路620的第一端与第二管路直接连通,第二抽气管路620的第二端连通干泵320的进口端。
第二抽气管路620设有第二控制阀630。示例性的,第二控制阀630包括第二针阀631和第二气动截止阀632,第二针阀631和第二气动截止阀632间隔设置于第二抽气管路620,如此,通过第二气动截止阀632控制第二抽气管路620的通断,通过第二针阀631可以精确调节第二抽气管路620的气流量。
采用本实施例,在第二气体进气口212与第二气体流量控制器610之间出现异常,第二气体进气口212无法正常进气的情况下,利用第二控制阀630导通第二抽气管路620,使第二气体由第二抽气管路620进入真空泵300,避免因憋气导致气压过大。
在一些实施例中,半导体工艺腔室还包括压力检测元件,压力检测元件设置于腔室本体100内,以检测腔室本体100内的气压,压力检测元件可以但不限为压力传感器,压力检测元件与压力控制阀400通信连接。在第一气体进气口211与气路连通的情况下,压力控制阀400的开度为与压力检测元件检测的压力值相对应的第一开度,以使腔室本体100处于第一气压值;在第二气体进气口212与气路连通的情况下,压力控制阀400的开度为与压力检测元件检测的压力值相对应的第二开度,以使腔室本体100处于第二气压值。其中,第一气压值与第二气压值的差值在预设压差范围内。
示例性的,压力控制阀400的控压范围为30mTorr-200mTorr,第一气压值可以为75mTorr,第二气压值可以为55mTorr,预设压差范围可以为10mTorr-30mTorr,而第一气压值与第二气压值的差值为20mTorr,故二者的差值在预设压差范围内。当然,第一气压值和第二气压值也可以为其他数值,根据需要设定预设压差范围。
需要说明的是,在刻蚀过程中腔室本体100的压力越高,刻蚀速率越快;在沉积过程中腔室本体100的压力越低,沉积均匀性越高。在理想状态下,第一气压值和第二气压值之间的差值达到150mTorr的情况下,刻蚀速率和产量越高。
采用本实施例,根据腔室本体100的气压来调节压力控制阀400的开度,使第一工艺过程中和第二工艺过程中腔室本体100分别维持在合适气压值,有利于控制第一工艺过程中和第二工艺过程中腔室本体100的压差维持在合适范围内,进而有利于兼顾工艺效率和工艺均匀性。
在一些实施例中,半导体工艺腔室还包括控制器,控制器包括至少一个存储器和至少一个处理器,存储器中存储有计算机程序,计算机程序被处理器执行时以实现半导体工艺方法的步骤,半导体工艺方法包括:
在执行第一工艺步骤时,控制切换阀板220运动至第一位置,以使第一气体通过第一气体进气口211进入腔室本体100内;在执行第二工艺步骤时,控制切换阀板220运动至第二位置,以使第二气体通过第二气体进气口212进入腔室本体100内。
示例性的,控制器可以为上位机,也可以是下位机。其中,控制器可以直接控制切换阀板220,也可以控制驱动切换阀板220运动的驱动件,以使切换阀板220运动至第一位置或第二位置,从而向腔室本体100的内部通入相应的工艺气体。
采用本实施例,利用控制器实现切换阀板220运动位置的自动化切换过程,有利于快速切换切换阀板220的运动位置,进而快速切换第一工艺步骤和第二工艺步骤,有利于进一步缩短第一气体和第二气体的切换时间,进一步有效避免腔室本体100进气延迟的问题,对第一工艺步骤和第二工艺步骤中腔室本体100的控压过程也会更加快速准确,提升工艺效果。
在进一步的实施例中,第一工艺步骤为刻蚀步骤,第一气体为刻蚀气体,第二工艺步骤为沉积步骤,第二气体为沉积气体。半导体工艺方法还包括:交替执行第一工艺步骤和第二工艺步骤,即,交替执行刻蚀步骤和沉积步骤。
采用本实施例,控制器通过控制切换阀板220在第一位置和第二位置之间持续切换,实现刻蚀步骤和沉积步骤的快速切换,并且在交替执行刻蚀步骤和沉积步骤的过程中,有效避免各个工艺步骤的进气延迟问题,有效缩短整个工艺过程的时长,对各个工艺步骤中腔室本体100的过程更加快速准确,有利于进一步提升工艺效果。
相关技术中,由于利用管路向腔室本体100内通入第一气体或者第二气体,导致第一气体和第二气体进入腔室本体100的时间存在延迟,压力检测元件也需要延迟检测腔室本体100的压力值,进而压力控制阀400也需要延迟动作,由于进气和压力控制过程都存在延迟,故也需延迟加载射频,导致整个Bosch工艺的每个循环过程时间延长,且因延迟问题不易控制刻蚀过程和沉积过程中腔室本体100的气压差。
而本申请实施例中,半导体工艺方法包括交替进行的第一工艺步骤和第二工艺步骤,具体地,第二工艺步骤包括控制切换阀板220运动至第二位置,第二气体进气口212通过气路与腔室本体100连通,使第二气体通过第二气体进气口212进入腔室本体100内;第一工艺步骤包括控制切换阀板220运动至第一位置,第一气体进气口211通过气路与腔室本体100连通,使第一气体通过第一气体进气口211进入腔室本体100内。
示例性地,第一工艺步骤为刻蚀步骤,第二工艺步骤为沉积步骤,半导体工艺方法即Bosch工艺,其包括多个循环过程,每个循环过程分别包括上述的沉积步骤和刻蚀步骤。示例性地,刻蚀步骤包括第一刻蚀步骤和第二刻蚀步骤,参考图9所示。
沉积步骤包括:控制切换阀板220运动至第二位置,沉积气体快速进入腔室本体100内,同时,压力检测元件检测腔室本体100内的气压值,压力控制阀400根据检测的气压值调节开度,使腔室本体100维持在第二气压值,然后启上射频,维持时间t=0.2s。该步骤中通常用Ar、C4F8等沉积气体在晶片111孔洞的侧面形成氟碳聚合物层,为使孔洞的底部基本不形成氟碳聚合物层,该步骤中一般从采用相对较低的射频频率。
第一刻蚀步骤包括:控制切换阀板220运动至第一位置,刻蚀气体快速进入腔室本体100内,同时,压力检测元件检测腔室本体100内的气压值,压力控制阀400根据检测的气压值调节开度,使腔室本体100维持在第一气压值,然后依次启上射频和低频,维持时间t=0.2s。其中,第一气压值与第二气压值的差值在预设压差范围内。
第二刻蚀步骤包括:继续依次启上射频和低频,维持时间t=0.2s。刻蚀步骤通常用Ar、O2、SF6等气体进行等离子刻蚀。
可以根据需要设定Bosch工艺的循环数,当完成设定循环数的循环过程后,说明完成一个工艺过程。也就是说,刻蚀步骤与沉积步骤交替进行,当刻蚀步骤结束时需要将刻蚀气体排出至腔室本体100之外同时注入沉积气体,同样地,当沉积步骤结束时需要将沉积气体排出至腔室本体100之外同时注入刻蚀气体,依次循环。
图10示出了四个循环过程的时序图,其中,第二气体流量控制器610控制第二气体的流量为250sccm,第一气体流量控制器510控制第一气体的流量为85sccm,沉积步骤中上射频的射频电压为2200dBW,刻蚀步骤中上射频的射频电压为2794dBW-2800dBW,第一刻蚀步骤中低频的射频电压为330dBW-336dBW,沉积过程中腔室本体100的气压为75mTorr,刻蚀过程中腔室本体100的气压为55mTorr,在工艺过程中,腔室本体100的气压呈现梯形形状的方波波形。
采用上述工艺流程,由于直接利用切换阀板220的运动来控制第一气体或第二气体进入腔室本体100,有效避免上一工艺过程残留的气体进入腔室本体内并参与下一工艺过程,避免两种工艺气体混合参与工艺过程,且第一气体和第二气体进入腔室本体100基本不会存在延迟,那么压力检测元件也无需延迟检测气压值,同时,也无需延迟加载射频,使得整个半导体工艺方法的时长有效缩短,更易控制第一工艺步骤和第二工艺步骤中腔室本体100的气压差。而且,简化半导体工艺方法的控制过程,缩减了半导体工艺方法的配方参数,有效降低半导体工艺方法的开发难度。
在本申请的另一些其他实施例中,请参考图12和图13所示,进气组件200包括第一进气单元和第二进气单元,第一进气单元和第二进气单元交替与进气组件200的出气端连通。
第一进气单元包括第一进气管281、第一抽气管283和第一切换阀板223,第一进气管281的进气端为第一气体进气口211,第一进气管281可通入第一气体,第一抽气管283的进气口和第一进气管281的出气口并排设置,第一切换阀板223可转动地设置于第一抽气管283的进气口和第一进气管281的出气口。当第一切换阀板223转动至不同的位置时,能够开启第一抽气管283的进气口以及开启第一进气管281的出气口。如此,通过改变第一切换阀板223的转动位置直接控制第一进气管281的出气口以及第一抽气管283的进气口,无需分别对第一进气管281和第一抽气管283进行控制。
第二进气单元包括第二进气管282、第二抽气管284和第二切换阀板224,第二进气管282的进气端为第二气体进气口212,第二进气管282可通入第二气体,第二抽气管284的进气口和第二进气管282的出气口并排设置,第二切换阀板224可转动地设置于第二抽气管284的进气口和第二进气管282的出气口。当第二切换阀板224转动至不同的位置时,能够开启第二抽气管284的进气口以及开启第二进气管282的出气口。如此,通过改变第二切换阀板224的转动位置直接控制第二进气管282的出气口以及第二抽气管284的进气口,无需分别对第二进气管282和第二抽气管284进行控制。
示例性的,第一切换阀板223和第二切换阀板224可以分别与电机、气动马达等提供旋转动力的驱动源相连,利用驱动源驱动第一切换阀板223或第二切换阀板224转动。在进一步的实施例中,前文所述的用于驱动切换阀板220移动的线性驱动件或这里的驱动源可以由控制器进行控制,控制器控制两个线性驱动件或两个驱动源的状态,从而使第一进气单元和第二进气单元交替进气。
在本实施例中,第一进气单元和第二进气单元交替与进气组件200的出气端连通,在第一进气单元与进气组件200的出气端连通的情况下,第二切换阀板224可转动至开启第二抽气管284的位置,第二抽气管284对第二进气管282抽气,即将第二进气管282内的工艺气体抽走,避免残留的工艺气体进入腔室本体100内与下一工艺过程的工艺气体混合参与下一工艺过程;同样地,在第二进气单元与进气组件200的出气端连通的情况下,第一切换阀板223可转动至开启第一抽气管283的位置,第一抽气管283对第一进气管281抽气,即将第一进气管281内的工艺气体抽走,避免上一工艺过程残留的工艺气体进入腔室本体100内与下一工艺过程的工艺气体混合参与下一工艺过程,有利于提升工艺效果。
示例性的,第一进气管281可通入刻蚀气体,第二进气管282可通入沉积气体,两种工艺过程分别为刻蚀过程和沉积过程。在Bosch刻蚀工艺工程中,刻蚀过程和沉积过程的切换能够有效避免刻蚀所得到的深孔的侧壁产生不光滑的扇贝结构,使得深孔的侧壁更加光滑,避免对后续工艺产生影响,有利于提升工艺效果,进而有利于提高器件的良率。当然,第一气体进气口211和第二气体进气口212也可以分别通入其他不同种类的工艺气体。
在一些其他实施例中,在第一进气单元与进气组件200的出气端连通的情况下,第一切换阀板223处于封堵第一抽气管283的进气口的位置,即第一抽气管283无法抽气。采用本实施例,通过封堵第一抽气管283,能够避免第一抽气管283抽走腔室本体100内的气体,避免影响工艺过程。
示例性的,在第一进气单元与进气组件200的出气端连通的情况下,第一切换阀板223处于开启第一进气管281的位置,第一进气管281进气,如此,由于第一抽气管283被封堵,也避免第一抽气管283抽走第一进气管281内的气体,保证第一进气管281进入的第一工艺气体顺利进入腔室本体100内。
当然,在其他实施例中,第一抽气管283的出气口连接第一抽气泵,在第一进气单元与进气组件200的出气端连通的情况下,第一切换阀板223处于开启第一抽气管283的进气口的位置,第一抽气泵处于未工作状态。
在进一步的实施例中,在第一进气单元与进气组件200的出气端连通的情况下,说明第一进气单元向腔室本体100内提供工艺气体,第二切换阀板224处于转动状态。示例性的,第二切换阀板224的转动平面与第二进气管282的出气口所在的平面相平行,也与第二抽气管284的进气口所在的平面相平行。
具体地,在第二切换阀板224处于转动状态时,也就是在第二切换阀板224转动的过程中,第二进气管282的出气口与第二抽气管284的进气口均具有完全开启、部分开启和完全封堵三种状态,当第二进气管282的出气口完全开启时,第二抽气管284的进气口被完全封堵;当第二进气管282的出气口部分开启时,第二抽气管284的进气口也部分开启,即被封堵一部分;当第二进气管282的出气口被完全封堵时,第二抽气管284的进气口完全开启,第二切换阀板224通过转动使第二进气管282的出气口与第二抽气管284的进气口在完全开启、部分开启和完全封堵三种状态间不断切换。
采用本实施例,当第一进气单元进气时,利用转动中的第二切换阀板224实现逐渐开启第二进气管282的同时实现逐渐关闭第二抽气管284,以及实现在逐渐关闭第二进气管282的同时实现逐渐开启第二抽气管284,使第二抽气管284抽吸第二进气管282内的残余气体,避免第二进气管282内的残余气体对工艺过程产生影响。同时,由于第二切换阀板224处于转动状态,避免了第二进气单元的管道处于憋气状态,因此可以避免单步工艺时间较长的情况下,憋气状态时间较长而导致硬件损坏。
示例性的,第一抽气管283的进气口和第一进气管281的出气口均呈半圆形结构,且二者拼合成圆形结构,第一切换阀板223呈半圆形结构,第一切换阀板223绕圆形结构的轴线转动,第一抽气管283的进气口和第一进气管281的出气口对齐设置。如此,采用此种结构,第一切换阀板223在转动过程中能够与第一抽气管283的进气口完全重合,从而完全封堵第一抽气管283的进气口,或者第一切换阀板223与第一进气管281的出气口完全重合,从而完全封堵第一进气管281的出气口,有利于简化进气组件200的结构。
当然,第一抽气管283的进气口、第一进气管281的出气口以及第一切换阀板223也可以采用方形结构等其他结构。
在进一步的实施例中,参考图12所示,第一进气单元还包括第三控制阀291和第一管段285b,第一管段285b与第一抽气管283的进气口和第一进气管281的出气口相对,第三控制阀291设置于第一管段285b,第三控制阀291控制第一管段285b的通断。在第一进气管281的进气方向上,第三控制阀291位于第一切换阀板223的下游。在第一进气单元与进气组件200的出气端连通的情况下,第三控制阀291处于开启状态,保证第一工艺气体能够顺利通入腔室本体100内;在第二进气单元与进气组件200的出气端连通的情况下,第三控制阀291处于关闭状态,避免第二工艺气体与第一工艺气体混合进入腔室本体100内而影响工艺过程。
在一些其他实施例中,在第二进气单元与进气组件200的出气端连通的情况下,第二切换阀板224处于封堵第二抽气管284的进气口的位置,即第二抽气管284无法抽气。采用本实施例,通过封堵第二抽气管284,能够避免第二抽气管284抽走腔室本体100内的气体,避免影响工艺过程。
示例性的,在第二进气单元与进气组件200的出气端连通的情况下,第二切换阀板224处于开启第二进气管282的位置,第二进气管282进气,如此,由于第二抽气管284被封堵,也避免第二抽气管284抽走第二进气管282内的气体,保证第二进气管282进入的第二工艺气体顺利进入腔室本体100内。
当然,在其他实施例中,第二抽气管284的出气口连接第二抽气泵,在第二进气单元与进气组件200的出气端连通的情况下,第二切换阀板224处于开启第二抽气管284的进气口的位置,第二抽气泵处于未工作状态。
在进一步的实施例中,在第二进气单元与进气组件200的出气端连通的情况下,说明第二进气单元向腔室本体100内提供工艺气体,第一切换阀板223处于转动状态。示例性的,第一切换阀板223的转动平面与第一进气管281的出气口所在的平面相平行,也与第一抽气管283的进气口所在的平面相平行。
具体地,参考图13所示,在第一切换阀板223处于转动状态,也就是在第一切换阀板223转动的过程中,第一进气管281的出气口与第一抽气管283的进气口均具有完全开启、部分开启和完全封堵三种状态,当第一进气管281的出气口完全开启时,第一抽气管283的进气口被完全封堵;当第一进气管281的出气口部分开启时,第一抽气管283的进气口也部分开启,即被封堵一部分;当第一进气管281的出气口被完全封堵时,第一抽气管283的进气口完全开启,第一切换阀板223通过转动,使第一进气管281的出气口与第一抽气管283的进气口在完全开启、部分开启和完全封堵三种状态间切换。
采用本实施例,当第二进气单元进气时,利用转动中的第一切换阀板223实现逐渐开启第一进气管281的同时实现逐渐关闭第一抽气管283,以及实现在逐渐关闭第一进气管281的同时实现逐渐开启第一抽气管283,使第一抽气管283抽吸第一进气管281内的残余气体,避免第一进气管281内的残余气体对工艺过程产生影响。同时,由于第一切换阀板223处于转动状态,避免了第一进气单元的管道处于憋气状态,因此可以避免单步工艺时间较长的情况下,憋气状态时间较长而导致硬件损坏。
示例性的,第二抽气管284的进气口和第二进气管282的出气口均呈半圆形结构,且二者拼合形成圆形结构,第二切换阀板224呈半圆形结构,第二切换阀板224绕圆形结构的轴线转动,第二抽气管284的进气口和第二进气管282的出气口对齐设置。如此,采用此种结构,第二切换阀板224在转动过程中能够与第二抽气管284的进气口完全重合,从而完全封堵第二抽气管284的进气口,或者第二切换阀板224与第二进气管282的出气口完全重合,从而完全封堵第二进气管282的出气口,有利于简化进气组件200的结构。
当然,第二抽气管284的进气口、第二进气管282的出气口以及第二切换阀板224也可以采用方形结构等其他结构。
在进一步的实施例中,第二进气单元还包括第四控制阀292和第二管段285c,第二管段285c与第二抽气管284的进气口和第二进气管282的出气端相对,第四控制阀292设置于第二管段285c,第四控制阀292控制第二管段285c的通断。在第二进气管282的进气方向上,第四控制阀292位于第二切换阀板224的下游。在第二进气单元与进气组件200的出气端连通的情况下,第四控制阀292处于开启状态,保证第二工艺气体能够顺利通入腔室本体内;在第一进气单元与进气组件200的出气端连通的情况下,第四控制阀292处于关闭状态,避免第一工艺气体与第二工艺气体混合进入腔室本体100内而影响工艺过程。
示例性的,进气组件200还包括出气管285,出气管285包括主管路285a、上文中的第一管段285b和第二管段285c,第一管段285b和第二管段285c分别与主管路285a连通。如此,流经第一进气管281的第一气体或流经第二进气管282的第二气体经对应的管段和主管路285a流出。
综上所述,当开启第一工艺过程时,第三控制阀291处于开启状态,第一切换阀板223导通第一进气管281,且第一切换阀板223截断第一抽气管283,第一气体进入腔室本体以进行例如刻蚀步骤,同时,第四控制阀292处于关闭状态,第二切换阀板224转动,以快速切换进气过程和抽气过程,以避免第二进气单元的管道处于憋气状态;当开启第二工艺过程时,第三控制阀291处于关闭状态,第一切换阀板223转动,以快速切换进气过程和抽气过程,以避免第一进气单元的管道处于憋气状态,同时,第四控制阀292处于开启状态,第二切换阀板224导通第二进气管282,且第二切换阀板224截断第二抽气管284,第二气体进入腔室本体以进行例如沉积步骤。
基于上述实施例中的进气组件200,本申请实施例还公开一种半导体工艺腔室,参考图11所示,半导体工艺腔室包括腔室本体100和上述实施例中的进气组件200,腔室本体100设有进气口101,进气组件200设置于进气口101处,也就是说,出气管285的主管路285a与腔室本体100的进气口101连通。如此,该半导体工艺腔室通过进气组件200,避免上一工艺过程残留的工艺气体进入腔室本体100内与下一工艺过程的工艺气体混合参与下一工艺过程,有利于提升工艺效果。
基于上述实施例中的进气组件200,本申请实施例还公开一种半导体工艺方法,半导体工艺方法包括第一工艺步骤和第二工艺步骤。
第一工艺步骤:控制第一进气单元与进气组件200的出气端连通,使第一切换阀板223处于封堵第一抽气管283的进气口的位置,第二切换阀板224处于转动状态。具体地,此时第一切换阀板223也处于开启第一进气管281的位置,第一进气管281通入第一工艺气体,第一工艺气体可通入腔室本体100中;而且,通过转动的第二切换阀板224,第二抽气管284能够抽吸第二进气单元的残余气体。
第二工艺步骤:控制第二进气单元与进气组件200的出气端连通,使第二切换阀板224处于封堵第二抽气管284的进气口的位置,第一切换阀板223处于转动状态。具体地,此时第二切换阀板224也处于开启第二进气管282的位置,第二进气管282通入第二工艺气体,第二工艺气体可通入腔室本体100中;而且,通过转动的第一切换阀板223,第一抽气管283能够抽吸第一进气单元的残余气体。
示例性的,第一工艺气体可以为刻蚀气体,第二工艺气体可以为沉积气体,第一工艺步骤为刻蚀步骤,第二工艺步骤为沉积步骤,半导体工艺方法即Bosch工艺,其包括多个循环过程,每个循环过程分别包括上述的沉积步骤和刻蚀步骤。
采用上述半导体工艺方法,利用抽气管进行抽气,有效避免上一工艺过程残留的气体进入腔室本体100内并参与下一工艺过程,避免两种工艺气体混合参与工艺过程,有利于提升工艺效果。
上面结合附图对本申请的实施例进行了描述,但是本申请并不局限于上述的具体实施方式,上述的具体实施方式仅仅是示意性的,而不是限制性的,本领域的普通技术人员在本申请的启示下,在不脱离本申请宗旨和权利要求所保护的范围情况下,还可做出很多形式,均属于本申请的保护之内。

Claims (19)

  1. 一种进气组件,其特征在于,包括相连的进气窗和切换阀板,所述进气窗设有第一气体进气口和第二气体进气口,所述切换阀板可相对于所述进气窗在第一位置和第二位置之间运动,且所述切换阀板设有气路,所述气路与所述进气组件的出气端连通;
    在所述切换阀板位于所述第一位置的情况下,所述第一气体进气口与所述气路连通且所述第二气体进气口与所述气路断开;
    在所述切换阀板位于所述第二位置的情况下,所述第二气体进气口与所述气路连通且所述第一气体进气口与所述气路断开。
  2. 根据权利要求1所述的进气组件,其特征在于,所述进气组件还包括封堵件,所述封堵件设置于所述进气窗和所述切换阀板之间,所述气路包括第一气路段和第二气路段,所述第一气路段的出口端与所述第二气路段的出口端分别与所述进气组件的出气端连通,
    在所述切换阀板位于所述第一位置的情况下,所述第一气体进气口与所述第一气路段的进口端连通,所述封堵件封堵所述第二气路段的进口端;
    在所述切换阀板位于所述第二位置的情况下,所述第二气体进气口与所述第二气路段的进口端连通,所述封堵件封堵所述第一气路段的进口端。
  3. 根据权利要求2所述的进气组件,其特征在于,所述封堵件的数量为至少两个,其中包括第一封堵件和第二封堵件,所述第一封堵件设置于所述第一气路段的进口端,所述第二封堵件设置于所述第二气路段的进口端,所述封堵件为弹性结构,
    在所述切换阀板位于所述第一位置的情况下,所述第一封堵件处于弹性形变状态,以使所述第一气体进气口与所述第一气路段的进口端连通,所述第二封堵件封堵所述第二气路段的进口端;
    在所述切换阀板位于所述第二位置的情况下,所述第二封堵件处于弹性形变状态,以使所述第二气体进气口与所述第二气路段的进口端连通,所述第一封堵件封堵所述第一气路段的进口端。
  4. 根据权利要求3所述的进气组件,其特征在于,所述进气组件还包括第一挡件和第一固定件,所述第一挡件和所述第一固定件分别位于所述第一封堵件的两侧,所述第一挡件与所述进气窗相连,所述第一固定件与所述切换阀板相连,在所述切换阀板由所述第二位置切换至所述第一位置的过程中,所述第一挡件和所述第一固定件挤压所述第一封堵件,以使所述第一封堵件产生弹性形变;
    和/或,所述进气组件还包括第二挡件和第二固定件,所述第二挡件和所述第二固定件分别位于所述第二封堵件的两侧,所述第二挡件与所述进气窗相连,所述第二固定件与所述切换阀板相连,在所述切换阀板由所述第一位置切换至所述第二位置的过程中,所述第二挡件和所述第二固定件挤压所述第二封堵件,以使所述第二封堵件产生弹性形变。
  5. 根据权利要求1所述的进气组件,其特征在于,所述第一气体进气口和所述第二气体进气口成对设置,在所述进气窗的周向上,间隔设置有多对所述第一气体进气口和所述第二气体进气口;
    所述气路间隔设置多个,各所述气路分别与各对所述第一气体进气口和所述第二气体进气口相对应。
  6. 根据权利要求1所述的进气组件,其特征在于,所述进气组件还包括第一密封件,所述第一密封件设置于所述进气窗和所述切换阀板之间,且所述第一密封件位于所述第二气体进气口和所述第一气体进气口之间,以隔离所述第二气体进气口和所述第一气体进气口;
    和/或,所述进气组件还包括第二密封件,所述第二密封件设置于所述进气窗和所述切换阀板之间,以密封所述进气窗和所述切换阀板之间的间隙。
  7. 根据权利要求1至6任一项所述的进气组件,其特征在于,所述进气组件还包括匀流板,所述匀流板位于所述切换阀板背向所述进气窗的一侧,所述匀流板设有多个匀流孔,所述气路通过各所述匀流孔与所述进气组件的出气端连通。
  8. 根据权利要求7所述的进气组件,其特征在于,所述匀流板还设有匀流槽,所述匀流槽与所述切换阀板形成匀流空间,所述匀流槽连通多个所述匀流孔和所述气路。
  9. 根据权利要求7所述的进气组件,其特征在于,所述进气组件还包括第三密封件,所述第三密封件设置于所述匀流板和所述切换阀板之间,以密封所述匀流板和所述切换阀板之间的间隙。
  10. 一种进气组件,其特征在于,包括第一进气单元和第二进气单元,
    所述第一进气单元包括第一进气管、第一抽气管和第一切换阀板,所述第一抽气管的进气口和所述第一进气管的出气口并排设置,所述第一切换阀板可转动地设置于所述第一抽气管的进气口和所述第一进气管的出气口;
    所述第二进气单元包括第二进气管、第二抽气管和第二切换阀板,所述第二抽气管的进气口和所述第二进气管的出气口并排设置,所述第二切换阀板可转动地设置于所述第二抽气管的进气口和所述第二进气管的出气口;
    所述第一进气单元和所述第二进气单元交替与所述进气组件的出气端连通。
  11. 根据权利要求10所述的进气组件,其特征在于,在所述第一进气单元与所述进气组件的出气端连通的情况下,第一切换阀板处于封堵所述第一抽气管的进气口的位置;
    在所述第二进气单元与所述进气组件的出气端连通的情况下,第二切换阀板处于封堵所述第二抽气管的进气口的位置。
  12. 根据权利要求11所述的进气组件,其特征在于,在所述第一进气单元与所述进气组件的出气端连通的情况下,所述第二切换阀板处于转动状态;
    在所述第二进气单元与所述进气组件的出气端连通的情况下,所述第一切换阀板处于转动状态。
  13. 根据权利要求10所述的进气组件,其特征在于,所述第一抽气管的进气口和所述第一进气管的出气口均呈半圆形结构,且二者拼合成圆形结构,所述第一切换阀板呈半圆形结构;
    和/或,所述第二抽气管的进气口和所述第二进气管的出气口均呈半圆形结构,且二者拼成圆形结构,所述第二切换阀板呈半圆形结构。
  14. 根据权利要求10所述的进气组件,其特征在于,所述第一进气单元还包括第三控制阀和第一管段,所述第一管段与所述第一抽气管的进气口和所述第一进气管的出气口相对,所述第三控制阀设置于所述第一管段,在所述第一进气单元与所述进气组件的出气端连通的情况下,所述第三控制阀处于开启状态;
    和/或,所述第二进气单元还包括第四控制阀和第二管段,所述第二管段与所述第二抽气管的进气口和所述第二进气管的出气口相对,所述第四控制阀设置于所述第二管段,在所述第二进气单元与所述进气组件的出气端连通的情况下,所述第四控制阀处于开启状态。
  15. 一种半导体工艺腔室,其特征在于,包括腔室本体以及权利要求1-14任一项所述的进气组件,所述进气组件的出气端与所述腔室本体连通。
  16. 根据权利要求15所述的半导体工艺腔室,其特征在于,所述腔室本体设有排气口,所述半导体工艺腔室还包括压力控制阀,所述压力控制阀设置于所述排气口处,以调节所述排气口的开度。
  17. 根据权利要求16所述的半导体工艺腔室,其特征在于,所述压力控制阀包括至少两个阀板和驱动件,各所述阀板均可转动地设置于所述排气口处,以开启或关闭所述排气口,所述驱动件分别与各所述阀板相连,所述驱动件可驱动各所述阀板同时转动,以增大或减小所述排气口的开度。
  18. 一种半导体工艺方法,应用于权利要求1至9任一项所述的进气组件,其特征在于,所述方法包括:
    第一工艺步骤,控制切换阀板运动至第一位置,使第一气体通过第一气体进气口进入腔室本体内;
    第二工艺步骤,控制所述切换阀板运动至第二位置,使第二气体通过第二气体进气口进入所述腔室本体内;
    交替进行所述第一工艺步骤和所述第二工艺步骤。
  19. 一种半导体工艺方法,应用于权利要求10至14任一项所述的进气组件,其特征在于,所述方法包括:
    第一工艺步骤,控制所述第一进气单元与所述进气组件的出气端连通,使第一切换阀板处于封堵第一抽气管的进气口的位置,第二切换阀板处于转动状态;
    第二工艺步骤,控制所述第二进气单元与所述进气组件的出气端连通,使第二切换阀板处于封堵第二抽气管的进气口的位置,第一切换阀板处于转动状态。
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