WO2010092878A1 - Cvd装置 - Google Patents
Cvd装置 Download PDFInfo
- Publication number
- WO2010092878A1 WO2010092878A1 PCT/JP2010/051201 JP2010051201W WO2010092878A1 WO 2010092878 A1 WO2010092878 A1 WO 2010092878A1 JP 2010051201 W JP2010051201 W JP 2010051201W WO 2010092878 A1 WO2010092878 A1 WO 2010092878A1
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- WO
- WIPO (PCT)
- Prior art keywords
- masking
- carbonaceous substrate
- jig
- carbonaceous
- susceptor
- Prior art date
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- 230000000873 masking effect Effects 0.000 claims abstract description 59
- 239000000758 substrate Substances 0.000 claims description 59
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000000463 material Substances 0.000 description 29
- 239000002245 particle Substances 0.000 description 19
- 230000015572 biosynthetic process Effects 0.000 description 16
- 238000005755 formation reaction Methods 0.000 description 16
- 238000002488 metal-organic chemical vapour deposition Methods 0.000 description 14
- 239000007789 gas Substances 0.000 description 10
- 230000002093 peripheral effect Effects 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 238000000151 deposition Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- 230000008021 deposition Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000005055 methyl trichlorosilane Substances 0.000 description 1
- JLUFWMXJHAVVNN-UHFFFAOYSA-N methyltrichlorosilane Chemical compound C[Si](Cl)(Cl)Cl JLUFWMXJHAVVNN-UHFFFAOYSA-N 0.000 description 1
- 150000003961 organosilicon compounds Chemical class 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—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
- H01L21/68764—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 movable susceptor, stage or support, others than those only rotating on their own vertical axis, e.g. susceptors on a rotating caroussel
-
- 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
-
- 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
- C23C16/4587—Rigid and flat substrates, e.g. plates or discs the substrate being supported substantially vertically
- C23C16/4588—Rigid and flat substrates, e.g. plates or discs the substrate being supported substantially vertically the substrate being rotated
-
- 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
- H01L21/68771—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 supporting more than one semiconductor substrate
-
- 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
- H01L21/68785—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 the mechanical construction of the susceptor, stage or support
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
Definitions
- the present invention relates to a CVD apparatus for forming a SiC film on the entire surface of a carbonaceous substrate.
- a susceptor used for semiconductor epitaxial growth is made of a material in which a SiC coating layer is formed on the surface of a carbonaceous substrate.
- the formation of the SiC film on the surface of the carbonaceous substrate is usually carried out by directly subjecting a halogenated organosilicon compound containing a carbon source such as a hydrocarbon to a pyrolysis reaction in a reducing airflow, directly on the surface of the carbonaceous substrate.
- a CVD method chemical vapor deposition method
- the carbonaceous substrate is supported sideways (in a laid state) while the carbonaceous substrate 60 is supported by the masking member 61.
- a SiC film was formed.
- this method has the following problems. That is, when the film is formed with the carbonaceous substrate 60 facing sideways, the SiC film is formed in a state where particles such as dust and peeling pieces exist on the counterbore surface 60a of the carbonaceous substrate 60.
- the SiC film is formed using the susceptor in such a state, the particles are affected and the wafer stored in the counterbore moves in the counterbore surface and comes into contact with the side surface of the counterbore part. Chips and cracks occur, and in the worst case, a problem occurs in which the wafer jumps out of the counterbore.
- the carbonaceous base material is suspended on a rotating support rod having a cross-sectional area smaller than the diameter of the through hole of the carbonaceous base material, thereby continuously supporting the carbonaceous base material support contacts.
- the proposal of making it move is made (refer the following patent document 1).
- Such a proposal can solve the above problem.
- the proposal shown in Patent Document 1 can be applied only to a susceptor having a hole, and additionally requires a driving means for operating the rotary support rod, which increases the production cost of the CVD apparatus, A new problem such as an increase in the size of the apparatus arises.
- a susceptor self-supporting CVD apparatus has been proposed as shown in FIG. Specifically, in the CVD apparatus, the carbonaceous base material 51 to which the masking member 55 is attached is placed on the knife edge portion 50 a of the tip-tapered support base 50 and both surfaces of the carbonaceous base material 51 are mounted. Is supported by a pin 52. With such a structure, it can be applied to a susceptor having no holes, and driving means for operating the rotary support rod is not necessary, so that the production cost of the CVD apparatus increases, An increase in size can be prevented.
- the carbonaceous substrate 51 may rotate and shift in an oblique direction, and may further fall down. .
- the problem is not so great as long as only the one carbonaceous base material 51 falls down.
- the carbonaceous base material 51 may also fall down.
- the masking member 55 is only fitted in the recess of the carbonaceous substrate 51, there is a problem that the masking member 55 falls when an external force is applied.
- the fulcrum trace is formed on the outer periphery of the susceptor, there is a problem that a crack may occur in the outer periphery of the susceptor.
- the CVD apparatus has a structure in which a SiC film is formed on the carbonaceous substrate 51 while rotating the support base 50.
- the source gas is supplied at the central portion and the peripheral portion. Since the distance from the part is different, the flow rate and flow rate of the reacting source gas are different. For this reason, when the carbonaceous substrate 51 is arranged in a straight line as in a conventional CVD apparatus, the coating thickness varies depending on the arrangement position of the carbonaceous substrate 51, and the counterbore surface and the amount of warpage of the counterbore are extremely large. Had the problem of becoming.
- an object of the present invention is to provide a CVD apparatus capable of dramatically improving the quality and productivity of a susceptor without causing an increase in production cost and an increase in the size of the apparatus.
- the present invention introduces a gas into the inside of a plate-like carbonaceous substrate with a concave masking portion formed and a masking jig fitted into the masking portion.
- the carbonaceous substrate is formed by fixing the masking jig to the film forming jig.
- an upward angle with respect to the vertical axis of the main surface of the carbonaceous substrate is more than 0 ° and less than 90 °.
- a fulcrum trace is not formed in the outer peripheral part of a susceptor, and it can prevent that a crack arises in the outer peripheral part of a susceptor as a result.
- the SiC coating is not formed on the masking part covered with the masking jig, the surface of the carbonaceous substrate excluding the masking part is completely exposed, so the surface of the carbonaceous substrate excluding the masking part The SiC film is uniformly coated. Therefore, it is possible to suppress the occurrence of uneven color.
- the susceptor can be prevented from warping due to its own weight.
- the masking portion and the carbonaceous substrate are firmly fixed, it is difficult for the space and displacement to occur between the carbonaceous substrate and the jig, and the susceptor does not easily fall off.
- the amount of warpage is small, the appearance of cracks and color unevenness is suppressed and the appearance is kept good, so the quality of the susceptor can be improved.
- a driving means such as a rotary support scale is not required separately, it is possible to prevent a rise in the production cost of the CVD apparatus and an increase in the size of the CVD apparatus.
- an angle of the carbonaceous substrate with respect to the vertical axis is 1.5 ° or more and 2.5 ° or less.
- a thermal expansion sheet is disposed between the carbonaceous substrate and the masking jig.
- each carbonaceous substrate is arranged at an equal distance from the center of the apparatus.
- the distance from the source gas supply unit differs between the central part and the peripheral part, but if each carbonaceous substrate is arranged so as to be equidistant from the center of the apparatus, the carbonaceous substrate Since the difference in the distance from the source gas supply unit due to the arrangement position of the material is eliminated, the amount of warpage can be reduced in any susceptor.
- FIG. 1 It is a perspective view which shows the internal structure of the CVD apparatus of this invention. It is a top view which shows the internal structure of the CVD apparatus of this invention. It is a side view when a carbonaceous base material is mounted on a film forming jig. It is a principal part expansion exploded view of FIG. It is explanatory drawing when mounting
- FIGS. 2A and 2B are diagrams when semiconductor epitaxial growth is performed using a susceptor, where FIG.
- FIG. 1A is an explanatory diagram when particles are not present inside the counterbore
- FIG. 2B is an explanatory diagram when particles exist inside the counterbore.
- It is a perspective view which shows the internal structure of the conventional CVD apparatus. It is a perspective view which shows the internal structure of the conventional CVD apparatus.
- the CVD apparatus of the present invention has a disk-shaped turntable 1 that rotates when a SiC film is formed, and a plurality of film formations are formed near the outer periphery of the turntable 1.
- a jig 2 is arranged. These film forming jigs 2 are preferably arranged so as to be equidistant from the center of the apparatus (center 1a of the turntable 1). This is because the distance from the source gas supply unit differs between the central part and the peripheral part, but if the film forming jig 2 is arranged so as to be equidistant from the center of the apparatus, it is attached to the film forming jig 2.
- Each carbonaceous substrate 10 is also arranged so as to be equidistant from the center of the apparatus. Therefore, the difference in the distance from the raw material gas supply unit due to the arrangement position of the carbonaceous base material 10 is eliminated, so that the amount of warpage can be reduced in any susceptor.
- 10d in FIG. 1 is a counterbore, and the surface on which the counterbore 10d is formed is the main surface of the carbonaceous substrate 10 described above.
- the film forming jig 2 includes a pedestal 3, a support rod 4, a MOCVD cubicle 5, and a MOCVD screw 6, and is near one end of the pedestal 3.
- the support rod 4 is fixed.
- the MOCVD cubicle 5 is fixed to the other end of the support bar 4.
- the MOCVD cubicle 5 is attached to the MOCVD cubicle 5 with a MOCVD screw so as to be inclined upward by ⁇ (2 ° in this embodiment) with respect to the horizontal axis 8. 6 is fixed.
- a screw portion 7a of a masking jig 7 is screwed into a screw hole 6a formed on the inner periphery of the MOCVD screw 6, and a plate-like main body portion 7b is fixed to the screw portion 7a.
- the main body portion 7b is fitted to the masking portion (recessed portion) 10a of the carbonaceous base material 10 so that the contact surface 7c of the main body portion 7b and the bottom surface 10b of the masking portion (recessed portion) 10a are in contact with each other.
- the film formation in the masking portion 10a is prevented.
- the center of gravity is located at the approximate center of the film-forming jig 2 with the carbonaceous substrate 10 disposed, the film-forming jig 2 falls down when the film is formed. Can be prevented.
- the main body 7b is configured to be perpendicular to the screw 7a. Therefore, the main surface of the disk-shaped carbonaceous substrate 10 attached to the main body 7b is inclined by ⁇ (2 ° in this embodiment) with respect to the vertical axis 9.
- the carbonaceous base material 10 is attached to the masking jig 7 so that the main surface of the carbonaceous base material 10 is slightly upward, thereby suppressing the carbonaceous base material 10 from falling. It is possible to suppress the formation of the SiC film in the state where particles such as dust and peeling pieces exist on the counterbore 10d of the base material 10.
- the carbonaceous base material 10 is prepared.
- the main body part 7b of the masking jig 7 is fitted into the masking part (concave part) 10a.
- FIG. 2C after screwing the screw portion 7a of the masking jig 7 into the screw hole 6a of the MOCVD screw 6, a number of film forming jigs 2 are arranged in the vicinity of the outer periphery of the turntable 1. By arranging in, the film formation preparation is completed.
- the MOCVD screw 6 is fixed so as to be inclined upward by ⁇ with respect to the horizontal axis 8 (that is, the inclination of the carbonaceous substrate 10 is fixed).
- the present invention is not limited to this, and as shown in FIG. 6, the MOCVD screw 6 may be configured to be rotatable in the A direction and the B direction with respect to the MOCVD cubicle 5. With such a configuration, the inclination of the carbonaceous substrate 10 can be changed according to the film forming conditions and the like.
- the contact surface 7c of the masking jig 7 is tilted with respect to the vertical axis 9 by an angle ⁇ as shown in FIG. Also, the same effect as described above is exhibited.
- a structure may be employed in which a thermal expansion sheet 12 is disposed between the inner peripheral surface 10 c of the carbonaceous substrate 10 and the outer peripheral surface 7 d of the masking jig 7. Further, it may be wound around the outer peripheral portion 7d of the masking jig 7. With such a structure, the fitting between the main body portion 7b of the masking jig 7 and the masking portion (recessed portion) 10a of the carbonaceous base material 10 becomes stronger, so that the carbonaceous base material 10 becomes the masking jig 7.
- the SiC film is prevented from being peeled off from the susceptor due to the fact that the thermal expansion sheet 12 has a lower strength than the SiC film. it can.
- Example 1 A susceptor was manufactured using the CVD apparatus shown in the mode for carrying out the invention. The susceptor thus produced is hereinafter referred to as the present invention susceptor A1.
- Examples 2 to 7 CVD apparatus in which the upward angle ⁇ of the susceptor main surface with respect to the vertical axis 9 is 1.0 °, 1.5 °, 2.5 °, 3.0 °, 4.0 °, and 5.0 °, respectively.
- a susceptor was produced in the same manner as in Example 1 except that was used.
- the susceptors thus produced are hereinafter referred to as the present invention susceptors A2 to A7, respectively.
- Table 1 shows the results of investigating the dropping rate of the carbonaceous substrate and the particle deposition region during the production of the susceptors A1 to A7 of the present invention and the comparative susceptors Z1 and Z2.
- the experimental conditions are as follows. Experimental conditions Pressure in the apparatus: 0.1 to 760 Torr Furnace temperature: 1150-1500 ° C Introducing gas: CH 3 SiCl 3 (methyltrichlorosilane), Hydrogen gas as carrier gas SiC film thickness: 40-60 ⁇ m
- the susceptor A1, A4 to A7 of the present invention having the inclination angle ⁇ of 2.0 ° or more and the comparative susceptor Z2 showed no detachment of the carbonaceous base material.
- 14% of the susceptor A3 according to the present invention having an inclination angle ⁇ of 1.5 ° is dropped, 65% of the susceptor A3 according to the present invention having an inclination angle ⁇ of 1.0 ° is dropped. It can be seen that 92% of the comparative susceptor Z1 with an angle ⁇ of 0 ° is missing.
- the susceptor A7 of the present invention having an inclination angle ⁇ of 5.0 ° particles of about 50 ⁇ m or less are confirmed in the region of 1/2 or more below the counterbore edge, and particles are also confirmed in the counterbore surface.
- the comparative susceptor Z2 having an inclination angle ⁇ of 90 ° a large amount of particles of about 50 ⁇ m or less were confirmed in the counterbore surface.
- the inclination angle ⁇ needs to be 0 ° ⁇ ⁇ 90 °, and in particular 1.0 ° ⁇ ⁇ ⁇ 4.0 ° (among them 1.5 ° ⁇ ⁇ ⁇ 2. It is preferable to regulate to 5 °.
- FIG. 5B when the particles 15 are present in the counterbore surface 10e, a place where the wafer 14 is lifted from the counterbore surface 10e appears when the wafer 14 is placed. In this case, since the wafer 14 is processed at a high speed, when the wafer 14 is lifted from the counterbore surface 10e, the wafer 14 moves in the counterbore 10d and comes into contact with the counterbore side surface 10f. Chips and cracks occur, and in the worst case, the wafer 14 jumps out of the counterbore 10d. On the other hand, when the particle 15 does not exist in the counterbore surface 10e as shown in FIG.
- the CVD apparatus of the present invention can be used for manufacturing a susceptor for semiconductor epitaxial growth.
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Abstract
Description
即ち、炭素質基材60を横向きで被膜形成を行うと、炭素質基材60のザグリ面60aにゴミや剥離片等のパーティクルが存在するという状態でSiC被膜が形成されることになる。このような状態となったサセプターを用いてSiC被膜の形成を行うと、パーティクルが影響して、ザグリ内に収納されたウエハがザグリ面内で動き、ザグリ部の側面と接触する結果、ウエハにカケやクラックが発生し、最悪の場合、ウエハがザグリ内から飛び出すといった不具合が生じる。また、膜厚が均一でないことに起因して色むらが生じるという課題も有していた。
更に、マスキング冶具に覆われているマスキング部はSiC被膜が形成されない一方、マスキング部を除く炭素質基材の表面は完全な露出状態となっているので、マスキング部を除く炭素質基材の表面には、SiC被膜が均一にコーティングされる。したがって、色むらが生じるのを抑止できる。
加えて、炭素質基材は縦向きの状態で支持されるため、炭素質基材の自重によってサセプターに反りが発生するのを抑制できる。また、マスキング部と炭素質基材とはしっかりと固定されているので、炭素質基材と治具との間に空間やずれが生じにくくサセプターは脱落し難い。
更に、回転支持秤などの駆動手段等を別途必要としないので、CVD装置の生産コストの高騰や、CVD装置の大型化を招来するのを防止できる。
このような構成であれば、SiC被膜形成中に炭素質基材が落下するのを抑制できる効果と、ザグリ内にパーティクルが溜まるのを抑制できる効果とが一層発揮されることになる。
このような構造であれば、炭素質基材とマスキング冶具との嵌合がより強固なものとなるので、炭素質基材がマスキング冶具から落下するのを一層抑制でき、且つ、炭素質基材とマスキング冶具との間に空間が生じるのが抑制されるので、マスキング部内に皮膜形成用のガスが侵入するのを抑えることができ、しかも、熱膨張シートはSiC被膜より強度が小さいということに起因して、被膜形成終了後にマスキング冶具をサセプターから取り外す際、サセプターからSiC被膜が剥がれるのを阻止できる。
CVD装置の内部においては、中央部と周辺部とでは原料ガス供給部からの距離が異なるが、各炭素質基材は装置の中心から等距離となるように配置されていれば、炭素質基材の配置位置による原料ガス供給部からの距離の差異は解消されるので、何れのサセプターにおいても、そのそり量を低減できる。
先ず、同図(a)に示すように、被膜形成用冶具2と、マスキング冶具7と、炭素質基材10とを用意した後、同図(b)に示すように、炭素質基材10のマスキング部(凹部)10aに、マスキング冶具7の本体部7bを嵌め合わせる。しかる後、同図(c)に示すように、MOCVD用ネジ6のネジ穴6aに、マスキング冶具7のネジ部7aを螺合した後、多数の被膜形成用冶具2を回転台1の外周近傍に配置することにより、被膜形成準備が完了する。
(1)上記形態では、水平軸8に対して上向きにθだけ傾くようにMOCVD用ネジ6が固定される(即ち、炭素質基材10の傾きを固定している)が、このような構造に限定するものではなく、図6に示すように、MOCVD用キュービクル5に対してMOCVD用ネジ6がA方向、B方向に回動可能な構成としても良い。このような構成であれば、皮膜形成条件等に応じて、炭素質基材10の傾きを変化させることが可能となる。
〔実施例1〕
上記発明を実施するための形態で示したCVD装置を用いてサセプターを作製した。
このようにして作製したサセプターを、以下、本発明サセプターA1と称する。
鉛直軸9に対するサセプター主面の上向き角度θを、それぞれ、1.0°、1.5°、2.5°、3.0°、4.0°、及び、5.0°としたCVD装置を用いた他は、上記実施例1と同様にしてサセプターを作製した。
このようにして作製したサセプターを、以下それぞれ、本発明サセプターA2~A7と称する。
鉛直軸9に対するサセプター主面の上向き角度(以下、傾斜角度と称する場合がある)θをそれぞれ、0°及び90°としたCVD装置を用いた他は、上記実施例1と同様にしてサセプターを作製した。
このようにして作製したサセプターを、以下それぞれ、比較サセプターZ1、Z2と称する。
上記本発明サセプターA1~A7及び比較サセプターZ1、Z2の作製時における炭素質基材の脱落割合とパーティクル堆積領域とについて調べたので、その結果を表1に示す。尚、実験条件(被膜形成条件)は、以下の通りである。
・実験条件
装置内の圧力:0.1~760Torr
炉内の温度:1150~1500℃
導入ガス:CH3SiCl3(メチルトリクロロシラン)と、
キャリアガスとして水素ガス
SiC被膜の膜厚:40~60μm
以上のことを考慮すれば、傾斜角度θは、0°<θ<90°である必要があり、特に1.0°≦θ≦4.0°(その中でも1.5°≦θ≦2.5°)に規制するのが好ましい。
2:被膜形成用冶具
6:MOCVD用ネジ
7:マスキング冶具
7b:本体部
8:水平軸
9:鉛直軸
10:炭素質基材
10a:マスキング部
Claims (4)
- 板状の炭素質基材の一部に凹状のマスキング部が形成され、このマスキング部にマスキング冶具を嵌め込んだ状態で、内部にガスを導入することにより、マスキング冶具により覆われた部位を除いた炭素質基材の表面にSiC被膜を形成するCVD装置において、
上記マスキング冶具を被膜形成用冶具に固定することにより、上記炭素質基材を被膜形成用冶具で支持し、且つ、上記炭素質基材の主面の鉛直軸に対する上向き角度が0°を超え90°未満となるように構成されていることを特徴とするCVD装置。 - 上記鉛直軸に対する上記炭素質基材の主面の上向き角度が1.5°以上2.5°以下となっている、請求項1に記載のCVD装置。
- 上記炭素質基材とマスキング冶具との間には熱膨張シートが配置されている、請求項1又は2に記載のCVD装置。
- 複数の被膜形成用冶具を用いて炭素質基材の表面にSiC被膜を形成する場合に、各炭素質基材は装置の中心から等距離となるように配置される、請求項1~3の何れか1項に記載のCVD装置。
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CN103717784A (zh) * | 2011-10-14 | 2014-04-09 | 东洋炭素株式会社 | Cvd装置、使用了该cvd装置的基座的制造方法、及基座 |
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KR101416583B1 (ko) * | 2013-04-26 | 2014-07-09 | 주식회사 케이엔제이 | 물질전달 지배 반응에 의한 서셉터 제조방법과 장치 및 그에 의해 제조된 서셉터 |
KR101423464B1 (ko) | 2014-03-10 | 2014-07-28 | 주식회사 케이엔제이 | 물질전달 지배 반응에 의한 서셉터 제조장치 |
KR101671671B1 (ko) * | 2016-05-25 | 2016-11-01 | 주식회사 티씨케이 | 반도체 제조용 부품의 재생방법과 그 재생장치 및 재생부품 |
CN107385418A (zh) * | 2017-07-24 | 2017-11-24 | 江苏实为半导体科技有限公司 | 一种可在衬底上全覆盖沉积的cvd设备 |
JP6682078B2 (ja) | 2018-06-27 | 2020-04-15 | 株式会社フェローテックマテリアルテクノロジーズ | SiC部材 |
JP7279465B2 (ja) * | 2019-03-28 | 2023-05-23 | 住友金属鉱山株式会社 | 支持基板、支持基板の保持方法、及び、成膜方法 |
US20220411959A1 (en) * | 2021-06-24 | 2022-12-29 | Coorstek Kk | Susceptor and manufacturing method thereof |
KR102478833B1 (ko) * | 2021-09-29 | 2022-12-16 | 에스케이씨솔믹스 주식회사 | 서셉터 샤프트 가공 지그 |
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JP5394092B2 (ja) | 2014-01-22 |
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US20110308459A1 (en) | 2011-12-22 |
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