WO2016148385A1 - 리프트 핀 및 이의 제조 방법 - Google Patents
리프트 핀 및 이의 제조 방법 Download PDFInfo
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- WO2016148385A1 WO2016148385A1 PCT/KR2016/000687 KR2016000687W WO2016148385A1 WO 2016148385 A1 WO2016148385 A1 WO 2016148385A1 KR 2016000687 W KR2016000687 W KR 2016000687W WO 2016148385 A1 WO2016148385 A1 WO 2016148385A1
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- wafer
- pin
- lift pin
- susceptor
- shaft
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- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B25/00—Single-crystal growth by chemical reaction of reactive gases, e.g. chemical vapour-deposition growth
- C30B25/02—Epitaxial-layer growth
- C30B25/12—Substrate holders or susceptors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/677—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations
- H01L21/67703—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations between different workstations
- H01L21/67712—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations between different workstations the substrate being handled substantially vertically
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical 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 deposition of inorganic material, other than metallic material
- C23C16/24—Deposition of silicon only
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical 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
- C23C16/458—Chemical 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 supporting substrates in the reaction chamber
- C23C16/4581—Chemical 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 supporting substrates in the reaction chamber characterised by material of construction or surface finish of the means for supporting the substrate
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical 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
- C23C16/458—Chemical 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 supporting substrates in the reaction chamber
- C23C16/4582—Rigid and flat substrates, e.g. plates or discs
- C23C16/4583—Rigid and flat substrates, e.g. plates or discs the substrate being supported substantially horizontally
- C23C16/4586—Elements in the interior of the support, e.g. electrodes, heating or cooling devices
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical 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
- C23C16/46—Chemical 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 heating the substrate
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- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/02—Elements
- C30B29/06—Silicon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/683—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L21/6835—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/683—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L21/687—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches
- H01L21/68714—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support
- H01L21/68742—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support characterised by a lifting arrangement, e.g. lift pins
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/683—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L21/687—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches
- H01L21/68714—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support
- H01L21/68757—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support characterised by a coating or a hardness or a material
Definitions
- the present invention relates to a lift pin and a method for manufacturing the same, and more particularly, a lift pin for supporting the wafer through a hole in a susceptor on which the wafer is placed in an epitaxial process that is performed on a wafer. And to a method of manufacturing the same.
- a semiconductor device includes a fab process for forming a plurality of chips patterned with a circuit pattern on the wafer based on a wafer made of a thin single crystal substrate made of silicon, and each chip formed in the fab process electrically connected to the substrate. It may be manufactured by performing a bonding process for connecting and a molding process for protecting the chip connected to the substrate from the outside.
- the wafer is prepared by slicing a cylindrical ingot thinly and then performing a polishing process to smooth the surface.
- the epitaxial process may include a process chamber into which a silane gas is injected, a susceptor on which a wafer having the polishing process is placed in the process chamber, and a vertical drive through the hole of the susceptor.
- a process chamber into which a silane gas is injected
- a susceptor on which a wafer having the polishing process is placed in the process chamber and a vertical drive through the hole of the susceptor.
- an epitaxial device comprising a lift pin for placing the wafer on the susceptor or spaced from the susceptor and a heater providing heat inside the process chamber to heat the wafer to a process temperature of about 1000 to 1400 ° C. Proceed.
- a silane gas provided inside the process chamber reacts on the surface of the wafer through the heat of the heater to grow crystals, and the growing crystals form gaps in the wafer surface. It proceeds in the form of filling. Therefore, a thin film of a few micrometers level is formed on the surface of the wafer to lower the surface roughness of the wafer or to remove defects present on the surface of the wafer, thereby obtaining a high quality wafer.
- the wafer is heated to a high temperature of about 1000 to 1400 °C by the heater as described above, there is bound to be a slight warpage phenomenon on the wafer.
- the lift pin may cause scratches on the wafer where the warp phenomenon occurs.
- vibration is generated by the friction between the lift pin and the susceptor, and the vibration, scratching, chipping, and grinding of the wafer are caused. May occur.
- the wafer may be damaged by scratching, chipping, or grinding, and particles may be generated due to damage to the wafer, thereby degrading the quality of the wafer surface.
- the quality of the film formed on the wafer surface may be reduced by the epitaxial process.
- An object of the present invention is to provide a lift pin capable of stably supporting a wafer having a warpage phenomenon and maintaining the wafer quality as it is.
- Another object of the present invention is to provide a method for manufacturing the above lift pin.
- a lift pin supports the wafer through a hole in a susceptor in which the wafer is placed in a process chamber where an epitaxial process is performed on the wafer.
- the pin head is formed of a glassy carbon material, the pin head is formed in contact with the wafer, the shaft penetrating the hole of the susceptor and the outer peripheral surface between the pin head and the shaft is the pin head It may include a pin neck formed inclined so as to narrow toward the shaft from.
- the lift pin according to an embodiment may have a structure in which the glassy carbon is coated on a ceramic base material.
- the pin head may have a rounded portion in contact with the wafer.
- the pin head may have a radius of curvature R of 11 to 17 mm in contact with the wafer.
- Inclined angle of the pin neck may be characterized in that ⁇ 5 ° based on the inclination angle formed on the upper portion of the hole.
- the shaft may have an outer diameter of 2 to 10% smaller based on the diameter of the hole.
- Surface of the pin head, the shaft and the pin neck may have a roughness of 0.1 to 0.5 ⁇ m.
- the manufacturing method of the lift pin for supporting the wafer through the hole of the susceptor in which the wafer is placed in the process chamber in which the epitaxial process is performed on the wafer has a surface Preparing a base made of glassy carbon and having a pin head which contacts and supports the wafer, a shaft penetrating the hole of the susceptor, and a pin neck formed between the pin head and the shaft; Mirror treating the surface of the base.
- the mirror treatment step according to an embodiment may be a mirror surface treatment so that the surface of the base has a roughness of 0.1 to 0.5 ⁇ m.
- the base may be prepared by coating the glassy carbon on a ceramic base material.
- the lift pin for driving the up and down substantially through the hole of the susceptor in which the wafer is placed in the process chamber in which the epitaxial process is carried out to substantially support the wafer hardness It is made of a glassy carbon material which is excellent in the surface contact with the wafer and can be rounded, so that the wafer having the warpage phenomenon during the epitaxial process does not generate particles due to scratching, chipping, or grinding. I can support it stably.
- a thin film for reducing surface roughness may be stably formed on the surface of the wafer. Therefore, not only the quality of the highly integrated semiconductor device manufactured from the wafer can be improved, but also a high production yield for the semiconductor device can be expected.
- FIG. 1 is a schematic view showing an epitaxial device having a lift pin installed according to an exemplary embodiment of the present invention.
- FIG. 2 illustrates a state in which the lift pin supports the wafer before the epitaxial process in the epitaxial device illustrated in FIG. 1.
- FIG. 3 is a view illustrating a portion in which the lift pin and the wafer contact each other in FIG. 2.
- FIG. 4 is a diagram illustrating a state in which a wafer is placed on a susceptor for an epitaxial process in the epitaxial device illustrated in FIG. 1.
- FIG. 5 is a view illustrating a portion in which a wafer is placed on a susceptor in FIG. 4.
- FIG. 6 is an enlarged view of a portion A of FIG. 5.
- FIG. 7 is a view illustrating a state in which warpage occurs in a wafer when an epitaxial process is performed in the epitaxial device illustrated in FIG. 1.
- FIG. 8 is a view illustrating a state in which a lift pin supports a wafer in which a warpage phenomenon occurs after the epitaxial process is performed in the epitaxial device shown in FIG. 1.
- FIG. 9 is a view illustrating a portion in which the lift pin and the wafer contact each other in FIG. 8.
- FIG. 10 is an enlarged view of a portion B of FIG. 9.
- FIG. 11 is a view illustrating whether scratches and particles are generated according to a radius of curvature of a pin head contacting a wafer in a lift pin in FIG. 10.
- the lift pin according to the present invention supports the wafer through a hole in a susceptor in which the wafer is placed in a process chamber in which an epitaxial process is performed on a wafer, and the surface is made of glassy carbon material.
- the element When an element is described as being disposed or connected on another element or layer, the element may be placed or connected directly on the other element, and other elements or layers may be placed therebetween. It may be. Alternatively, where one element is described as being directly disposed or connected on another element, there may be no other element between them. Terms such as first, second, third, etc. may be used to describe various items such as various elements, compositions, regions, layers and / or parts, but the items are not limited by these terms. Will not.
- Embodiments of the invention are described with reference to schematic illustrations of ideal embodiments of the invention. Accordingly, changes from the shapes of the illustrations, such as changes in manufacturing methods and / or tolerances, are those that can be expected sufficiently. Accordingly, embodiments of the invention are not to be described as limited to the particular shapes of the areas described as the illustrations, but include variations in the shapes, and the areas described in the figures are entirely schematic and their shapes. Is not intended to describe the precise shape of the region nor is it intended to limit the scope of the invention.
- FIG. 1 is a schematic view showing an epitaxial device having a lift pin installed according to an exemplary embodiment of the present invention.
- the epitaxial device 100 includes a process chamber 200, a heater 300, an upper dome 400, a lower dome 500, a susceptor 600, a lift pin 700, and a pin driver. 800.
- the process chamber 200 provides a space for performing an epitaxial process on the wafer 10 in which the polishing process is performed.
- the process chamber 200 may include a gas supply unit 210 and a gas discharge unit 220 at a side thereof so that a silane gas for reaction in an epitaxial process may be injected therein.
- the heater 300 is installed inside the process chamber 200.
- the heater 300 provides heat to the wafer 10 for reaction in the epitaxial process.
- the heater 300 may provide heat so that the wafer 10 may be heated to a process temperature of about 1000 to 1400 ° C. for the epitaxial process. Since the heater 300 is installed in the process chamber 200, it is difficult to replace the heater 300 substantially. Therefore, the heater 300 may be a halogen lamp that can provide uniform heat through light while having a relatively long lifespan.
- a plurality of heaters 300 may be installed on the upper side and the lower side of the process chamber 200 to provide uniform heat to the upper and lower portions of the wafer 10.
- Each of the upper dome 400 and the lower dome 500 is disposed above the heater 300 to isolate the wafer 10 from the plurality of heaters 300 in the process chamber 200.
- the lower and the upper portion of the heater 300 installed in the lower side are respectively installed.
- the upper dome 400 and the lower dome 500 are made of a transparent material so that light generated from the heaters 300 can pass therethrough.
- the upper dome 400 and the lower dome 500 may be made of quartz material.
- both sides of the upper dome 400 and the lower dome 500 are hermetically coupled to the gas supply part 210 and the gas discharge part 220. Accordingly, other gases other than silane gas may be blocked from being introduced into the space where the epitaxial process is performed on the wafer 10.
- the susceptor 600 is installed inside the process chamber 200, specifically, between the upper dome 400 and the lower dome 500 to allow the wafer 10 to be processed during the epitaxial process. I support it.
- the susceptor 600 may be made of silicon carbide (SiC) material having excellent thermal conductivity so that heat from the heater 300 may be stably transferred to the wafer 10 while having excellent hardness.
- the susceptor 600 may be formed of a structure in which the silicon carbide (SiC) is coated on a graphite base material for manufacturing efficiency. The susceptor 600 is supported and fixed at a constant height through the support mechanism 610.
- the lift pin 700 supports the wafer 10 to be placed on the susceptor 600 or to be spaced apart from the susceptor 600 while passing through the hole 620 formed in the susceptor 600 in the vertical direction. do.
- the lift pin 700 may be installed to penetrate the holes 620 of the susceptor 600 at at least three points in order to stably support the wafer 10.
- the pin driver 800 is connected to the lower portion of the lift pin 700 to provide a linear driving force to drive the lift pin 700 in the vertical direction.
- the pin driver 800 may include a cylinder structure that directly provides a linear driving force, and when the precise control is required, the rotational force of the servo motor and the servo motor in the linear direction is required. It may also include a coupling structure of the power switching mechanism for switching.
- FIG. 2 is a view illustrating a state in which a lift pin supports a wafer before an epitaxial process in the epitaxial device illustrated in FIG. 1
- FIG. 3 is a view illustrating a portion in which the lift pin and the wafer contact each other in FIG. 2. to be.
- the lift pin 700 has a pin head 710 directly in contact with the wafer 10, a shaft 720 passing through the hole 620 of the susceptor 600, and the pin head 710. And a pin neck 730 connecting them between the shaft 720.
- the outer diameter of the pin head 710 is formed larger than the outer diameter of the shaft 720, the outer circumferential surface of the pin neck 730 is inclined so as to become narrower toward the shaft 720 from the pin head 710 Can be formed.
- the lift pin 770 When the lift pin 770 is driven upward and downward along the hole 620 of the susceptor 600 while supporting the wafer 10 at a process temperature of about 1000 to 1400 ° C. at which the epitaxial process is performed.
- the lift pin 700 needs to have sufficient hardness so that particles are not generated due to friction with the wafer 10 and the susceptor 600.
- the lift pins 700 when the lift pins 700 support the wafer 10, the lift pins 700 may minimize the occurrence of scratches or particles that may be generated by contact with the wafers 10. There is a need to round the lift pin 700 so that the pin head 710 can be in point contact with the wafer 10.
- the lift pin 700 may be made of glassy carbon to satisfy both the hardness and the rounded processing.
- the glassy carbon is a ceramic material having sufficient strength and hardness according to the strength to have a flexural strength of about 147 MPa, and is a stable material having no change in its properties even at about 2000 ° C.
- the glassy carbon is a glassy liquid crystal state compared to silicon carbide (SiC) having a crystalline phase, so the crystal phase does not exist, and thus, the roundness processing is possible because the processability is relatively excellent.
- the glassy carbon (glassy carbon) is characterized in that the surface roughness (roughness) is formed very low about 2 to 3 ⁇ m compared to other ceramic materials due to the glassy liquid crystal state.
- the pin head 710, the shaft 720 and the pin neck 730 is processed in the form of a base using the glassy carbon (glassy carbon)
- a lift pin 700 having a very smooth surface having a surface roughness of about 0.1 to 0.5 ⁇ m may be easily obtained.
- the lift pin 700 drives the wafer 10 in the vertical direction along the hole 620 of the susceptor 600 while the epitaxial process is performed, the lift pin ( The friction between the 700 and the wafer 10 and the susceptor 600 may be further reduced to more stably prevent particle generation due to the friction.
- the lift pin 700 itself consists of the glassy carbon, the glassy carbon (glassy carbon) as a whole on the base material of the ceramic material
- the ceramic material may include any one of alumina (Al 2 O 3 ), silicon carbide (SiC), and graphite (C).
- FIG. 4 is a view illustrating a state in which a wafer is placed on a susceptor for an epitaxial process in the epitaxial device illustrated in FIG. 1
- FIG. 5 is a view illustrating a portion in which the wafer is placed on the susceptor in FIG. 4.
- 6 is an enlarged view of a portion A of FIG. 5.
- the lift pin 700 is then lowered using the pin driver 800 so that the wafer 10 is placed on the susceptor 600.
- the pin neck 730 of the lift pin 700 is a silane (silane) gas supplied from the gas supply unit 210 to the wafer 10 during the epitaxial process is the susceptor 600 It is necessary to prevent leakage through the hole 620 of the).
- heat generated from the heater 300 is uniformly transferred to the wafer 10 placed in the susceptor 600.
- heat flow through the hole 620 is lost to the lower structure or the like.
- the heat may not be uniformly transferred to the wafer 10. Therefore, there is a need to maintain sufficient airtightness for the hole 620 so that a defect does not occur in the film formed on the wafer 10 according to the epitaxial process.
- the inclined angle a1 of the pin neck 730 has about ⁇ 5 ° based on the inclination angle a2 formed at the upper portion of the hole 620 coupled thereto.
- the shaft 720 of the lift pin 700 when the shaft 720 of the lift pin 700 has an outer diameter d2 which is less than about 2% of the inner diameter d1 of the susceptor 600 hole 620, The spacing between the susceptor 600 and the shaft 720 is too narrow. Thus, the friction force between the susceptor 600 and the shaft 720 is increased to increase the possibility of particles.
- the shaft 720 of the lift pin 700 has a smaller outer diameter d2 greater than about 10% of the inner diameter d1 of the susceptor 600 hole 620, the shaft 720 may be When driving in the vertical direction along the hole 620 may be shaken in the horizontal direction. Therefore, the lift pin 700 may not stably support the wafer 10. Therefore, the shaft 720 of the lift pin 700 preferably has an outer diameter of about 2 to 10% smaller based on the inner diameter d1 of the susceptor 600 hole 620.
- the lift pin 700 is made of glassy carbon having a surface roughness of about 0.1 ⁇ m to about 0.5 ⁇ m, the bottom surface of the lift pin 700 coupled with the pin driver 800.
- the horizontal level of can also be precisely maintained. Therefore, the vertical stroke of the lift pin 700 by the pin driver 800 may always proceed at a constant position.
- FIG. 7 is a view illustrating a state in which warpage occurs in a wafer when an epitaxial process is performed in the epitaxial device illustrated in FIG. 1.
- the epitaxial process may be performed by supplying heat from the heater 300 and silane gas from the gas supply unit 210 to the wafer 10 placed on the susceptor 600. Proceed practically. At this time, a bending phenomenon in which the wafer 10 is bent by heat from the heater 300 naturally occurs.
- the glassy carbon constituting the lift pin 700 has a thermal conductivity of about 3 to 6 W / m ⁇ k, which is relatively lower than that of other ceramic materials. Therefore, the lift pin 700 transfers only a part of the heat transferred from the heater 300 to the wafer 10 during the epitaxial process. Therefore, it is possible to prevent deterioration of a portion of the wafer 10 that contacts the lift pin 700.
- the lift pin 700 is very high thermal conductivity, such as alumina (Al 2 O 3 ), silicon carbide (SiC) of about 25 to 50 W / m ⁇ k, 110 to 130 W / m ⁇ k, respectively When made of a ceramic material having a large heat loss through the lift pin 700 may occur.
- the lift pin 700 due to the high thermal conductivity of the lift pin 700, heat transferred directly from the heater 300 is transferred to the wafer 10 through the lift pin 700 as it is. Therefore, the temperature of the portion of the wafer 10 in contact with the lift pin 700 is higher than the temperature of the other portion of the wafer 10 in the portion of the wafer 10 in contact with the lift pin 700. Deterioration marks may occur. However, when the lift pin 700 is made of glassy carbon as in the present invention, heat loss through the lift pin 700 is suppressed due to the significantly low thermal conductivity of the glassy carbon, and the wafer ( The deterioration mark can be prevented from occurring in 10).
- FIG. 8 is a view illustrating in detail a state in which the lift pin supports the wafer on which the warpage phenomenon occurs after the epitaxial process is performed in the epitaxial device shown in FIG. 1, and FIG. 9 illustrates the lift pin and the wafer in FIG. 8.
- FIG. 10 is an enlarged view of a portion B of FIG. 9, and FIG. 11 illustrates whether scratches and particles are generated according to a radius of curvature of a pin head contacting a wafer in a lift pin in FIG. 9. A diagram for explaining.
- the lift pin 700 is raised through the pin driver 800 to separate the wafer 10 from which the warpage occurs from the susceptor 600.
- the position where the pin head 710 of the lift pin 700 and the wafer 10 in which the warpage phenomenon occurs is in contact with the wafer 10 in a predetermined distance from the contact point shown in FIG. 3. are spaced apart by (g).
- the pin head 710 in order to stably support the wafer 10 in which the warpage phenomenon occurs, the pin head 710 needs to have a radius of curvature R within a predetermined range.
- the radius of curvature R of the pin head 710 will be described in more detail.
- the wafer 10 when the radius of curvature R of the pin head 710 is less than about 11 mm, the wafer 10 is in a state where stress is concentrated at a contact point where the pin head 710 contacts the wafer 10. Because of the warpage of the scratches and particles appear to be generated while moving the contact point is not preferred.
- the radius of curvature R of the pin head 710 exceeds about 17 mm, the local contact area between the pin head 710 and the wafer 10 is excessive and at the edge portion of the pin head 710. This is undesirable because it appears that the contact stress is concentrated and scratches are generated.
- the radius of curvature R of the pin head 710 exceeds about 23 mm, since the pin head 710 is in contact with the wafer 10 while having a substantially flat shape, particles appear to be generated. More undesirable. Therefore, the radius of curvature R of the portion of the pin head 710 in contact with the wafer 10 is preferably about 11 to 17 mm.
- the experiment was conducted on the 300 mm wafer 10 in order to confirm the range of the radius of curvature R of the pin head 710, but other wafers 10 of 200 mm or 400 mm size
- the difference in curvature radius according to the bending phenomenon is less than about 1 mm compared to the 300 mm size wafer 10
- the radius of curvature R of the pin head 710 described above is 200 mm or 400 above. It can be understood that the same applies to the wafer 10 having a mm size.
- the epitaxial process is performed to carry out the wafer 10 stably supported by the lift pin 700 to the outside, thereby manufacturing a highly integrated semiconductor device having a line width of about 12 to 16 nm. Proceed.
- the wafer 10 may be driven up and down while passing through the hole 620 of the susceptor 600 in which the wafer 10 is placed in the process chamber 200 where the epitaxial process is performed.
- the wafer having the warpage phenomenon during the epitaxial process is manufactured by manufacturing a lift pin 700 supported by a glass with a glassy carbon material having excellent hardness and being capable of rounding the part in contact with the wafer 10. (10) can be stably supported without generating scratches and particles.
- the line width manufactured using the aper 10 may not only improve the quality of the highly integrated semiconductor device but also high production yield of the semiconductor device.
- the lift pin used in the epitaxial process is made of a glassy carbon material in which the contact portion with the wafer is rounded, so that the lift pin is in the process of performing the epitaxial process. It can be utilized to improve the quality of the wafer by preventing scratches and particles are generated by.
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Abstract
Description
곡률반경(mm) | 스크래치 | 파티클 |
R5 | 불량 | 불량 |
R8 | 불량 | 불량 |
R11 | 양호 | 양호 |
R14 | 양호 | 양호 |
R17 | 양호 | 양호 |
R20 | 불량 | 양호 |
R23 | 불량 | 양호 |
R26 | 불량 | 불량 |
Claims (10)
- 웨이퍼를 대상으로 에피택셜 공정이 진행되는 공정 챔버의 내부에서 상기 웨이퍼가 놓여지는 서셉터의 홀을 관통하여 상기 웨이퍼를 지지하고, 표면이 유리질 카본(glassy carbon) 재질로 이루어지며,상기 웨이퍼와 접촉하는 상부에 형성되는 핀 헤드;상기 서셉터의 홀을 관통하는 샤프트; 및상기 핀 헤드 및 상기 샤프트 사이에서 외주면이 상기 핀 헤드로부터 상기 샤프트로 갈수록 좁아지도록 경사지게 형성된 핀 넥을 포함하는 것을 특징으로 하는 리프트 핀.
- 제1항에 있어서, 세라믹 재질의 모재에 상기 유리질 카본이 코팅된 구조를 갖는 것을 특징으로 하는 리프트 핀.
- 제1항에 있어서, 상기 핀 헤드는 상기 웨이퍼와 접촉하는 부위가 라운드진 형태를 갖는 것을 특징으로 하는 리프트 핀.
- 제3항에 있어서, 상기 핀 헤드는 상기 웨이퍼와 접촉하는 부위의 곡률반경 R이 11 내지 17㎜인 것을 특징으로 하는 리프트 핀.
- 제1항에 있어서, 상기 핀 넥의 경사진 각도는 상기 홀의 상단 부위에 형성된 경사각을 기준으로 ± 5°인 것을 특징으로 하는 리프트 핀.
- 제1항에 있어서, 상기 샤프트는 상기 홀의 직경을 기준으로 2 내지 10% 작은 외경을 갖는 것을 특징으로 하는 리프트 핀.
- 제1항에 있어서, 상기 핀 헤드, 상기 샤프트 및 상기 핀 넥의 표면은 0.1 내지 0.5㎛의 조도(roughness)를 갖는 것을 특징으로 하는 리프트 핀.
- 웨이퍼를 대상으로 에피택셜 공정이 진행되는 공정 챔버의 내부에서 상기 웨이퍼가 놓여지는 서셉터의 홀을 관통하여 상기 웨이퍼를 지지하는 리프트 핀의 제조 방법에 있어서,표면이 유리질 카본(glassy carbon)으로 이루어지며, 상기 웨이퍼와 접촉하여 지지하는 핀 헤드, 상기 서셉터의 홀을 관통하는 샤프트 및 상기 핀 헤드와 상기 샤프트의 사이에 형성된 핀 넥으로 구성된 베이스를 준비하는 단계; 및상기 베이스의 표면을 경면 처리하는 단계를 포함하는 것을 특징으로 하는 리프트 핀의 제조 방법.
- 제8항에 있어서, 상기 경면 처리하는 단계에서는 상기 베이스의 표면이 0.1 내지 0.5㎛의 조도(roughness)를 갖도록 경면 처리하는 것을 특징으로 하는 리프트 핀의 제조 방법.
- 제8항에 있어서, 상기 베이스를 준비하는 단계에서는 세라믹 재질의 모재에 상기 유리질 카본을 코팅하여 상기 베이스를 준비하는 것을 특징으로 하는 리프트 핀의 제조 방법.
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US15/556,167 US10431488B2 (en) | 2015-03-19 | 2016-01-22 | Lift pin and method for manufacturing same |
JP2017545887A JP6492192B2 (ja) | 2015-03-19 | 2016-01-22 | リフトピン及びこの製造方法 |
CN201680016511.XA CN107407004B (zh) | 2015-03-19 | 2016-01-22 | 升降销及其制造方法 |
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KR102401504B1 (ko) * | 2020-01-02 | 2022-05-24 | 에스케이실트론 주식회사 | 리프트 핀, 이를 포함하는 웨이퍼의 가공 장치 및 웨이퍼의 제조방법 |
KR102331800B1 (ko) * | 2020-04-01 | 2021-11-29 | 에스케이실트론 주식회사 | 서셉터 및 이를 포함하는 웨이퍼의 제조 장치 |
US20240038575A1 (en) * | 2022-07-27 | 2024-02-01 | Applied Materials, Inc. | Thickness uniformity improvement kit for thermally sensitive epitaxial processing |
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US20180053683A1 (en) | 2018-02-22 |
CN107407004A (zh) | 2017-11-28 |
TW201643984A (zh) | 2016-12-16 |
KR101548903B1 (ko) | 2015-09-04 |
US10431488B2 (en) | 2019-10-01 |
CN107407004B (zh) | 2020-09-29 |
JP2018507561A (ja) | 2018-03-15 |
TWI587432B (zh) | 2017-06-11 |
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