JP7189345B2 - 断熱構造体、基板処理装置、半導体装置の製造方法、基板処理方法およびプログラム - Google Patents
断熱構造体、基板処理装置、半導体装置の製造方法、基板処理方法およびプログラム Download PDFInfo
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- JP7189345B2 JP7189345B2 JP2021528768A JP2021528768A JP7189345B2 JP 7189345 B2 JP7189345 B2 JP 7189345B2 JP 2021528768 A JP2021528768 A JP 2021528768A JP 2021528768 A JP2021528768 A JP 2021528768A JP 7189345 B2 JP7189345 B2 JP 7189345B2
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
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- YXTPWUNVHCYOSP-UHFFFAOYSA-N bis($l^{2}-silanylidene)molybdenum Chemical compound [Si]=[Mo]=[Si] YXTPWUNVHCYOSP-UHFFFAOYSA-N 0.000 description 1
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- 229910021343 molybdenum disilicide Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/0003—Linings or walls
- F27D1/0033—Linings or walls comprising heat shields, e.g. heat shieldsd
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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
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67098—Apparatus for thermal treatment
- H01L21/67109—Apparatus for thermal treatment mainly by convection
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- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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- 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
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67098—Apparatus for thermal treatment
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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
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/34—Nitrides
- C23C16/345—Silicon nitride
-
- 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
- C23C16/455—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 introducing gases into reaction chamber or for modifying gas flows in reaction chamber
- C23C16/45523—Pulsed gas flow or change of composition over time
- C23C16/45525—Atomic layer deposition [ALD]
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B17/00—Furnaces of a kind not covered by any preceding group
- F27B17/0016—Chamber type furnaces
- F27B17/0025—Especially adapted for treating semiconductor wafers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D5/00—Supports, screens, or the like for the charge within the furnace
- F27D5/0037—Supports specially adapted for semi-conductors
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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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
- H01L21/02112—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer
- H01L21/02123—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon
- H01L21/0217—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material being a silicon nitride not containing oxygen, e.g. SixNy or SixByNz
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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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02225—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer
- H01L21/0226—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process
- H01L21/02263—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase
- H01L21/02271—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition
- H01L21/0228—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition deposition by cyclic CVD, e.g. ALD, ALE, pulsed CVD
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- H—ELECTRICITY
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
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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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/324—Thermal treatment for modifying the properties of semiconductor bodies, e.g. annealing, sintering
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- H—ELECTRICITY
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- 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
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67098—Apparatus for thermal treatment
- H01L21/67103—Apparatus for thermal treatment mainly by conduction
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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
- H01L21/673—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 using specially adapted carriers or holders; Fixing the workpieces on such carriers or holders
- H01L21/67303—Vertical boat type carrier whereby the substrates are horizontally supported, e.g. comprising rod-shaped elements
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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
- H01L21/68792—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 construction of the shaft
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0227—Applications
- H05B1/023—Industrial applications
- H05B1/0233—Industrial applications for semiconductors manufacturing
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/42—Heating elements having the shape of rods or tubes non-flexible
- H05B3/44—Heating elements having the shape of rods or tubes non-flexible heating conductor arranged within rods or tubes of insulating material
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/62—Heating elements specially adapted for furnaces
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
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- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- General Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
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- Element Separation (AREA)
- Chemical Vapour Deposition (AREA)
Description
熱処理炉の温度勾配を伴う炉口付近に配置される断熱構造体であって、
金属製の遮熱材と、前記遮熱材の表裏各面を覆う石英もしくはセラミックス製の封止部材とを有し、前記封止部材の内部に構成された真空の空洞に前記遮熱材が配置された断熱板を複数備え、
前記複数の断熱板が、それぞれ互いに間隔を空けて配置されてなる断熱構造体を有する技術が提供される。
複数枚のウェハ7がボート21に装填(ウェハチャージ)されると、ボート21は、ボートエレベータ27によって処理室6内に搬入(ボートロード)される。このとき、蓋19は、Oリング19Aを介してマニホールド5の下端を気密に閉塞(シール)した状態となる。ウェハチャージする前のスタンバイの状態から、バルブ26を開き、カバー39内へ少量のパージガスが供給されうる。
処理室6内、すなわち、ウェハ7が存在する空間が所定の圧力(真空度)となるように、真空ポンプ18によって真空排気(減圧排気)される。この際、処理室6内の圧力は、圧力センサ16で測定され、この測定された圧力情報に基づきAPCバルブ17が、フィードバック制御される。カバー39内へのパージガス供給及び真空ポンプ18の作動は、少なくともウェハ7に対する処理が終了するまでの間は維持する。
処理室6内から酸素等が十分排気された後、処理室6内の昇温が開始される。処理室6が成膜に好適な所定の温度分布となるように、温度検出器28が検出した温度情報に基づきヒータ3及びキャップヒータ34への通電具合がフィードバック制御される。ヒータ3及びキャップヒータ34による処理室6内の加熱は、少なくともウェハ7に対する処理(成膜)が終了するまでの間は継続して行われる。キャップヒータ34への通電期間は、ヒータ3による加熱期間と一致させる必要はない。例えば成膜が開始される直前において、キャップヒータ34の温度は、成膜温度と同温度に到達し、マニホールド5の内面温度は180℃以上(例えば260℃)に到達していることが望ましい。直前に加熱したほうが、Oリング19Aが高温に晒される時間が短くなり、寿命が延びうる。
処理室6内の温度が予め設定された処理温度に安定すると、ステップ1~4を繰り返し実行する。なお、ステップ1を開始する前に、バルブ26を開き、パージガスの供給を増加させてもよい。
ステップ1では、処理室6内のウェハ7に対し、HCDSガスを供給する。バルブ11aを開くと同時にバルブ14aを開き、ガス供給管9a内へHCDSガスを、ガス供給管12a内へN2ガスを流す。HCDSガスおよびN2ガスは、それぞれMFC10a、13aにより流量調整され、ノズル8aを介して処理室6内へ供給され、排気管15から排気される。ウェハ7に対してHCDSガスを供給することにより、ウェハ7の最表面上に、第1の層として、例えば、1原子層未満から数原子層の厚さのシリコン(Si)含有膜が形成される。
第1の層が形成された後、バルブ11aを閉じ、HCDSガスの供給を停止する。このとき、APCバルブ17は開いたままとして、真空ポンプ18により処理室6内を真空排気し、処理室6内に残留する未反応もしくは第1の層の形成に寄与した後のHCDSガスを処理室6内から排出する。また、バルブ14aを開いたままとして、供給されたN2ガスは、ガス供給管9a、ノズル処理室6内をパージする。
ステップ3では、処理室6内のウェハ7に対してNH3ガスを供給する。バルブ11b,14bの開閉制御を、ステップ1におけるバルブ11a,14aの開閉制御と同様の手順で行う。NH3ガスおよびN2ガスは、それぞれMFC10b、13bにより流量調整され、ノズル8bを介して処理室6内へ供給され、排気管15から排気される。ウェハ7に対して供給されたNH3ガスは、ステップ1でウェハ7上に形成された第1の層、すなわちSi含有層の少なくとも一部と反応する。これにより第1の層は窒化され、SiおよびNを含む第2の層、すなわち、シリコン窒化層(SiN層)へと変化(改質)される。
第2の層が形成された後、バルブ11bを閉じ、NH3ガスの供給を停止する。そして、ステップ2と同様の処理手順により、処理室6内に残留する未反応もしくは第2の層の形成に寄与した後のNH3ガスや反応副生成物を処理室6内から排出する。
処理温度(ウェハ温度):250~700℃、
処理圧力(処理室内圧力):1~4000Pa、
HCDSガス供給流量:1~2000sccm、
NH3ガス供給流量:100~10000sccm、
N2ガス供給流量(ノズル):100~10000sccm、
N2ガス供給流量(回転軸):100~500sccm、
が例示される。それぞれの処理条件を、それぞれの範囲内のある値に設定することで、成膜処理を適正に進行させることが可能となる。
成膜処理が完了した後、バルブ14a、14bを開き、ガス供給管12a、12bからN2ガスを処理室6内へ供給し、排気管15から排気する。これにより、処理室6内の雰囲気が不活性ガスに置換され(不活性ガス置換)、残留する原料や副生成物が処理室6内から除去(パージ)される。その後、APCバルブ17が閉じられ、処理室6内の圧力が常圧になるまでN2ガスが充填される(大気圧復帰)。
ボートエレベータ27により蓋19が下降され、マニホールド5の下端が開口される。そして、処理済のウェハ7が、ボート21に支持された状態で、マニホールド5の下端から反応管4の外部に搬出される(ボートアンロード)。処理済のウェハ7は、ボート21より取出される。
(a)断熱板40内部に真空の空洞が形成され、空洞内に高反射率の遮熱材を埋め込むことにより、輻射熱を反射させて、処理室内の断熱性能を向上させることができる。
(b)よって、処理室内の温度安定時間を短縮することができ、ウェハ面内均一性を向上させることができる。
(c)具体的には、キャップヒータ34の下部に内部に真空の空洞が形成され、空洞内に遮熱材50を埋め込んだ断熱板40を配置することで、キャプヒータ34の輻射熱を炉内に留めて、処理室6下部の熱逃げを抑制することができる。
(d)また、断熱板40を覆うカバー39の側面に側部遮熱材54を設けることにより、キャップヒータ34の輻射熱を処理室6下部に逃がさず、ウェハ7に反射させることができる。
(e)また、反応管4の炉口付近に、断熱クロス51を巻き、さらに遮熱シート53で覆うことにより、ボトムウェハ等の温度が下がり易い箇所の断熱性能を向上させることができ、処理室内の温度安定時間を短縮させることができる。また、外部から炉内への輻射熱を反射して炉内温度を安定させることができる。
(f)また、フランジ部4Cの上面に熱吸収体56を設けることにより、フランジ部4C付近の輻射熱が吸収され、フランジ部4Cとマニホールド5の間のシール部材を保護することができる。
(g)また、従来と同等の枚数で断熱性能を向上させることができる。また、従来と同等の断熱性能を維持しようとした場合には、断熱板40の枚数を減らすことが可能となる。
なお当業者であれば、上述の実施形態における石英カバーの遮熱材は、最も上段の断熱板より上に配置し、それより下は不要或いは不透明石英で代替できることを理解するであろう。
2 炉
3 ヒータ
4 反応管
6 処理室
7 ウェハ(基板)
21 ボート(基板保持具)
22 断熱構造体
29 コントローラ
34 キャップヒータ(サブヒータ)
40 断熱板
50 遮熱材
51 断熱クロス
52 封止板
53 遮熱シート
54 側部遮熱材
56 熱吸収体
Claims (16)
- 熱処理炉の温度勾配を伴う炉口付近に配置される断熱構造体であって、
金属製の遮熱材と、前記遮熱材の表裏各面を覆う石英もしくはセラミックス製の封止部材とを有し、前記封止部材の内部に構成された真空の空洞に前記遮熱材が配置された断熱板を複数備え、
前記複数の断熱板が、それぞれ互いに間隔を空けて配置されてなる断熱構造体。 - 前記封止部材は1対の封止板で構成され、前記1対の封止板は、前記1対の封止板の全周において互いに接続される請求項1記載の断熱構造体。
- 前記複数の断熱板におけるそれぞれの前記遮熱材は、表裏面の間を連通させる少なくとも1つの貫通孔を有し、前記1対の封止板は、前記1対の封止板の全周及び前記貫通孔の中において互いに接続される請求項2記載の断熱構造体。
- 前記1対の封止板は、円盤状に形成され、前記遮熱材は前記1対の封止板のいずれよりも薄く形成される請求項2又は3記載の断熱構造体。
- 前記複数の断熱板におけるそれぞれの前記遮熱材は、鏡面の表面を有する請求項1記載の断熱構造体。
- 前記複数の断熱板におけるそれぞれの前記遮熱材は、前記空洞内で前記1対の封止板と面接触しないように支持される請求項2記載の断熱構造体。
- 前記複数の断熱板におけるそれぞれの前記遮熱材は、規則的に配置された複数の前記貫通孔を有する請求項3記載の断熱構造体。
- 前記1対の封止板は、自重で撓まないような剛性を有し、少なくとも前記互いに接続される部分を除き、鏡面の表面を有する請求項2記載の断熱構造体。
- 前記複数の断熱板におけるそれぞれの前記遮熱材は、エンボス加工が施される請求項6記載の断熱構造体。
- 前記複数の断熱板の配列軸と略同軸に設けられ、前記複数の断熱板を保持する断熱板保持具と、
前記配列軸と略同軸に設けられ、前記複数の断熱板を覆う、石英もしくはセラミックス製の筒状のカバーと、を更に備え、
前記カバーは、筒状の側部遮熱材が埋め込まれた側面を有する請求項1記載の断熱構造体。 - 内部で基板を処理する筒形の処理容器と、
前記処理容器内で前記基板を保持する基板保持具と、
前記処理容器内に処理ガスを供給する処理ガス供給部と、
前記処理容器外に設置され、前記処理容器内を加熱する筒形の第1ヒータと、
前記処理容器の一端に配置される蓋と、
前記基板保持具よりも前記蓋側寄りに設置され、前記処理容器内を加熱する第2ヒータと、
前記第1ヒータの前記蓋側の端と、前記蓋との間において、前記処理容器の外周に設置される断熱クロスと、
前記断熱クロスの外側に巻かれる遮熱シートと、
前記蓋と前記基板保持具との間に設置された断熱構造体と、を備え、
前記断熱構造体は、金属製の遮熱材と、前記遮熱材の表裏各面を覆う石英もしくはセラミックス製の封止部材とを有し、前記封止部材の内部に構成された真空の空洞に前記遮熱材が配置された断熱板を、互いに間隔を空けて複数配置して構成され、
前記断熱構造体の前記蓋から遠い端は、前記第1ヒータの前記蓋側の端よりも、前記処理容器の奥側に配置される
基板処理装置。 - 前記処理容器は、少なくとも前記第1ヒータに囲まれた部分が、赤外線を透過する材料で形成された反応管によって構成され、
前記反応管は、前記蓋側の相手側部材とシール部材を介して接続するフランジ部を有し、
前記フランジ部の、前記蓋側の相手側部材と反対側の面に、所定の放射率を有する熱吸収体を備えた請求項11記載の基板処理装置。 - 前記遮熱材および前記遮熱シートは、モリブデン製である請求項11又は12記載の基板処理装置。
- 金属製の遮熱材と前記遮熱材の表裏各面を覆う石英もしくはセラミックス製の封止部材とを有し、前記封止部材の内部に構成された真空の空洞に前記遮熱材が配置された断熱板が、間隔を空けて配置されてなる断熱構造体を、熱処理炉の温度勾配を伴う炉口付近に配置する工程と、
前記熱処理炉内に処理すべき基板を配置する工程と、
前記断熱構造体により断熱しながら、熱処理炉を加熱する工程と、
を有する半導体装置の製造方法。 - 金属製の遮熱材と前記遮熱材の表裏各面を覆う石英もしくはセラミックス製の封止部材とを有し、前記封止部材の内部に構成された真空の空洞に前記遮熱材が配置された断熱板が、間隔を空けて配置されてなる断熱構造体を、熱処理炉の温度勾配を伴う炉口付近に配置する工程と、
前記熱処理炉内に処理すべき基板を配置する工程と、
前記熱処理炉内を真空排気する工程と、
前記断熱構造体により断熱しながら、熱処理炉を加熱する工程と、
を有する基板処理方法。 - 金属製の遮熱材と前記遮熱材の表裏各面を覆う石英もしくはセラミックス製の封止部材とを有し、前記封止部材の内部に構成された真空の空洞に前記遮熱材が配置された断熱板が、間隔を空けて配置されてなる断熱構造体を、熱処理炉の温度勾配を伴う炉口付近に配置する手順と、
前記熱処理炉内に処理すべき基板を配置する手順と、
前記熱処理炉内を真空排気する手順と、
前記断熱構造体により断熱しながら、熱処理炉を加熱する手順と、
を基板処理装置のコンピュータに実行させるプログラム。
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