美国专利US20010007244A1 Film forming apparatus and film forming method

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专利摘要:
A film forming apparatus and method of the present invention include a substrate holding section for holding a plurality of substrates in a plane within a chamber, first and second process gas discharge sections provided opposite to the substrate holding section to discharge first and second process gases, a rotation mechanism for rotating the substrate holder, and a heater for heating the substrates. While the substrates are rotating as the substrate holding section rotates, the substrate holding section, first and second mono atomic layers are alternately stacked on the corresponding substrates. A compound film is therefore formed through a reaction involved under heating.
公开号:US20010007244A1
申请号:US09/752,677
申请日:2001-01-03
公开日:2001-07-12
发明作者:Kimihiro Matsuse
申请人:Tokyo Electron Ltd；
IPC主号:C23C16-45574

专利说明:
[0001] This application is based upon and claims the benefit of priority from the prior Japanese Patent Application No. 2000-000590, filed Jan. 6, 2000, the entire contents of which are incorporated herein by reference. [0001] BACKGROUND OF THE INVENTION
[0002] The present invention relates to a film forming apparatus and method for forming a TiN film, etc., by a CVD (Chemical Vapor Deposition) process using an ALD (Atomic Layer Deposition) method. [0002]
[0003] In a semiconductor device that should be miniaturized, use is made of a thin film of a metallic compound, such as tungsten silicide (WSi), titanium nitride (TiN) or titanium silicide (TiSi), as a material for a connection line and barrier layer formed on a semiconductor wafer (hereinbelow referred to as a wafer) that is an object to be processed. The thin film of such metallic compounds is used as buried layer formed an interconnect line or a contact hole for interconnection between lines or in a groove, etc. [0003]
[0004] Conventionally, such a metal compound thin film has been formed by a physical vapor deposition (PVD) method such as the sputtering. With a recent trend toward a higher density integration and a resultant thinner and thinner interconnect line or film, as well as with recent stricter design rules in particular, however, the PVD method provides no adequate countermeasure because a film formed is poor in “burying” property. For this reason, the CVD method has still been used by which a better “burying” property and better film formation can be expected. However, the use of the CVD method provides no adequate countermeasure for film quality required, step coverage and intimate adhesion of a film. For example, Jpn. Pat. Appln. KOKAI Publication No. 55-130896 discloses the technique of forming a metallic compound thin film having a better quality and optimal adhesion and step coverage and an attention has been paid to the ALD method. [0004]
[0005] In order to deposit the metallic compound thin film, the CVD method using the ALD technique may be utilized. Stated in more detail, upon the formation of a TiN film for example, one wafer is loaded into a chamber, TiCl[0005] ₄gas is supplied into the chamber, depositing a mono atomic layer of Ti layer. Then NH₃gas is supplied into the chamber, depositing a mono atomic layer as a nitride (N) layer doing so, these are reacted together in a heating atmosphere. By repeating such operation a predetermined number of times a TiN film of a predetermined thickness is obtained.
[0006] Upon the formation of a metallic compound thin film using the ALD technique, the switching of these supplying gases need to be made at high speeds. A high-speed switching valve is used for this purpose. The high-speed switching valve has, however, a short service life. [0006]
[0007] Further, upon the formation of a plurality of mono atomic layers, a process gas for forming a first film is supplied and then a purge gas is supplied before the supplying of a process gas for forming a second layer. By doing so, the earlier supply gas need to be completely exhausted from the chamber with the purge gas, thus taking a longer time in the formation of an intended film and hence lowering the productivity involved. [0007] BRIEF SUMMARY OF THE INVENTION
[0008] It is accordingly the object of the present invention to provide a film forming apparatus and method which can form films in high productivity with the use of an ALD method and can do so without using any high speed switching valve. [0008]
[0009] The present invention provides a film forming apparatus comprising: a chamber for holding substrates; a substrate holding section for holding these substrates within the chamber; first process gas discharge sections provided within the chamber and discharging a first process gas; second process gas discharge sections provided at those positions different from those of the first process gas discharge sections and discharging a second process gas; a rotation mechanism for rotating the substrate holding section and a heating section for heating the substrates. While the substrates are rotating as the substrate holding section rotates, films are formed on the substrates by alternately forming a mono atomic layer by the first process gas and a mono atomic layer by the second process gas over the substrates. [0009]
[0010] Further, the present invention provides a CVD film forming method for discharging first and second process gases from the first and second process gas discharge sections provided at mutually different positions onto corresponding substrates revolved within a chamber and forming films on the substrates by alternately forming a mono atomic layer by the first process gas and a mono atomic layer by the second process gas over the substrate. [0010]
[0011] Additional objects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objects and advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out hereinafter. [0011] BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING
[0012] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate presently preferred embodiments of the invention, and together with the general description given above and the detailed description of the preferred embodiments given below, serve to explain the principles of the invention. [0012]
[0013] FIG. 1 is a cross-sectional view showing a structure of a film forming apparatus, using an ALD method, according to a first embodiment of the present invention; [0013]
[0014] FIG. 2 is a plan view showing an inner structure as seen in a direction toward a wafer holder from a top wall side of the film forming apparatus shown in FIG. 1; [0014]
[0015] FIGS. 3A and 3B are views each showing a practical form of shower head of the film forming apparatus shown in FIG. 1; [0015]
[0016] FIG. 4 is a cross-sectional view showing a major section of a film forming apparatus of a second embodiment using the ALD method; [0016]
[0017] FIG. 5 is a cross-sectional view showing a major section of a film forming apparatus of a third embodiment using the ALD method; [0017]
[0018] FIG. 6 is a cross-sectional view showing an outer structure of a shower head used in the third embodiment; and [0018]
[0019] FIG. 7 is a cross-sectional view showing an major section of a film forming apparatus of a fourth embodiment using the ALD method. [0019] DETAILED DESCRIPTION OF THE INVENTION
[0020] The embodiment of the present invention will be explained below, with reference to the accompanying drawings. [0020]
[0021] FIG. 1 is a cross-sectional view showing a film forming apparatus, using an ALD method, according to a first embodiment of the present invention. FIG. 2 is a plan view showing an inner structure as seen in a direction toward a wafer holder from a top wall side of the apparatus. In the present embodiment, it will be described how a TiN film is formed by the CVD apparatus using an ALD technique. [0021]
[0022] This CVD film forming apparatus [0022] 1 has a chamber 2, in which a vacuum can be maintained. In the chamber, a wafer holding section (wafer holder) 3 is provided to allow four wafers W as to-be-processed objects to be horizontally held on it. Although, in this embodiment, the chamber 2 and wafer holder 3 are explained below as being substantially cylindrical and disk-like, respectively, the present invention is not restricted thereto.
[0023] The wafer holder [0023] 3 has four holders 4 a to 4 d, as shown in FIG. 2, each with a wafer W held on it. The center of the wafer holder 3 is coupled to a downwardly extending rotation shaft 5 which in turn is coupled to a shaft of a motor 6 through a fluid sealing section 7 for maintaining a hermetically air-tight state.
[0024] By the rotation of the motor [0024] 6, the wafer holder 3 is rotated in the direction of the arrow shown in FIG. 2. Thus, the wafers W held on the holders 4 a to 4 d revolve about the rotation shaft 5 with the rotation of the wafer holder 3.
[0025] A heater support section [0025] 8 is provided below the wafer holder 3. A heater 9 (inside heater 9 a, outside heater 9 b) is ring-like, extending along a moving locus of the wafer W and supported on the heater support section 8.
[0026] Process gas discharge nozzles (first process gas discharge sections) [0026] 11 and second process gas discharge nozzles (second process gas discharge sections) 12 are provided on the top wall 2 a of the chamber 2, having their gas discharge outlets set opposite to the upper surface of the wafer holder 3.
[0027] The first process gas discharge nozzles [0027] 11, as well as the second process gas discharge nozzles 12, are provided in pairs as shown in FIG. 2. These first and second process gas discharge nozzles 11 and 12 are alternately arranged at intervals of 90° around the center of the rotation shaft 5 along a circumference corresponding to the moving locus of the wafer W. Four purge gas discharge nozzles (purge gas discharge sections) 13 are arranged on the top wall 2 a of the chamber 2, with each one set at an intermediate position (45° position) between the first process gas discharge nozzle 11 and the second process gas discharge nozzle 12.
[0028] The gas discharge outlets of the purge gas discharge nozzles [0028] 13 are arranged at upper positions than those of the first and second process gas discharge nozzles 11 and 12. And predetermined gases are supplied from to these nozzles 11, 12 and 13 a later-described gas supply mechanism 20 into the chamber.
[0029] An exhaust hole [0029] 14 is provided at a center position in a bottom wall 2 b of the chamber 2 and connected to an exhaust pipe 15. An exhaustion system 16 is connected to the exhaust pipe 15, and, by the operation of the exhaust system 16, can reduce the interior of the chamber 2 to a predetermined vacuum level.
[0030] It is to be noted that the exhaust pipe [0030] 15 extends vertically downwardly from the exhaustion hole 14 to a position where it then extends in a horizontal direction. The rotation shaft 5 extends in the vertically downward portion of the exhaust pipe 15 and then extends through the horizontal section of the exhaust pipe, that is, through the fluid sealing section 7, and is connected to the shaft of the motor 6.
[0031] FIG. 3A shows a cross-sectional configuration of the first process gas discharge nozzle [0031] 11 and second process gas discharge nozzle 12 and FIG. 3B shows a cross-sectional configuration of the purge gas discharge nozzle 13.
[0032] The first process gas discharge nozzle [0032] 11 and second process gas discharge nozzle 12 each divide the corresponding process gas into a plurality of branched portions and discharge them as a fluid shower into the chamber.
[0033] Further, the purge gas discharge nozzle [0033] 13 is designed to discharge the purge gas in the form of a shower. The nozzle 13 has a skirt section 12 a provided at a forward end portion to suppress the spread of the gas and hence to provide a down flow in an air curtain.
[0034] The distance h between the discharge outlets of the first and second process gas discharge nozzles [0034] 11 and 12 on one hand and the surface of the wafers W, on the other hand, held by the holders 4 a, . . . , 4 d is in a range of 0.1 to 10 mm, preferably in a range of 0.1 to 5 mm. The distance h between the discharge outlet of the purge gas discharge nozzle 13 and the surface of the wafers W held by the corresponding holders is in a range of 0.2 to 50 mm and, preferably, 0.2 to 10 mm. The distance between the holders 4 a, . . . , 4 d and the discharge outlets of the purge gas discharge nozzles 13 is in a range of 1.1 to 50 mm and preferably in a range of 1.2 to 11 mm. In particular, the discharge outlets of the purge gas discharge nozzle 12 are located in an upper position (but in a position away from the wafer W) than the discharge outlets of the first and second process gas discharge nozzles 11 and 12 in which case a discharge Ar gas must serve as an air curtain.
[0035] The gas supply mechanism [0035] 20 has a ClF₃supply source 21 for supplying a ClF₃gas serving as a cleaning gas, an Ar supply source 22 for supplying an Ar gas, a TiCl₄supply source 23 for supplying a TiCl₄gas and an NH₃supply source 24 for supplying an NH₃gas.
[0036] The ClF[0036] ₃supply source 21 is connected by a gas line 25 and valve 26 to a mass flow controller (MFC) 27 and further by gas lines 28, 29 and 30 and valves 31 and 35, 32, and 33 and gas lines 36, 37, 38, 39 and 40 to the gas discharge nozzles 11, 12 and 13. At the time of cleaning, the ClF₃gas is supplied into the chamber. The Ar supply source 22 is connected by a gas line 41 and valve 42 to an MFC 43 and further by the valve 35 and gas lines 36, 37 and 40 to the gas discharge nozzles 11 and 12 to supply the Ar gas to the gas discharge nozzles 11 and 12.
[0037] Further, the TiCl[0037] ₄supply source 23 is connected by a gas line 44 and valve 45 to an MFC 46 and further by gas lines 36 and 40 to the gas discharge nozzles 11, to supply the TiCl₄gas into the chamber. The NH₃supply source 42 is connected by a gas line 47 and valve 48 to an MFC 49 and, further by a gas line 38 to the gas discharge nozzle 12 to supply the NH₃gas to be supplied into the chamber.
[0038] The first process gas contains any one of elements Ti, Ta, Si, W and Ru. It may be, for example, TiCl[0038] ₄, TaBr, Ta(OC₂H₅)₅, SiCl₄, SiH₄, Si₂H₆, SiH₂Cl₂, WF₆or the like. The second process gas contains N or O. It may be, for example, NH₃, NH₃(N₂), O2, O3, NO, N₂O₃, N₂O₅or the like.
[0039] In the CVD film forming apparatus thus constructed, first, semiconductor wafers W are inserted into the chamber [0039] 2 and sequentially set on the holders 4 a to 4 d of the wafer holder 3 within the chamber. Then the wafer holder is rotated while heating the wafers W.
[0040] Then, the interior of the chamber [0040] 2 is exhausted by the exhaustion system 16 to a predetermined vacuum level. The TiCl₄gas carried by the Ar gas, NH₃gas and Ar gas (purge gas) are supplied from the first process gas discharge nozzle 11, second process gas discharge nozzle 12 and purge gas discharge nozzle 13, respectively.
[0041] The wafers W held at the holders [0041] 4 b, 4 d of the holders 4 a to 4 d are first supplied with the TiCl₄gas from the first process gas discharge nozzles 11 to deposit a titanium layer as a mono atomic layer on the surfaces of the wafers involved. Then the wafer holder 3 is rotated to allow the wafer W to be brought, past an Ar gas curtain discharged from the purge gas nozzle 13, just beneath the second process gas discharge nozzle 12 where an NH₃gas is discharged to allow a nitride layer to be deposited as a mono atomic layer on the Ti layer, so that a TiN film is formed through a reaction of these.
[0042] Then the film-deposited semiconductor wafer is moved past an Ar gas curtain. In the same way as set out above, a titanium layer and nitride layer are stacked a predetermined number of times to provide a TiN film of a predetermined thickness. [0042]
[0043] On the wafers W held by the holders [0043] 4 a, 4 c and supplied with the NH₃gas from the second process gas discharge nozzles 12, a nitride layer is formed as a mono atomic layer with the use of the NH₃gas thus supplied. As the wafer holder 3 rotates, the wafer W is brought, past an Ar gas curtain discharged from the purge gas nozzle 13, to a position where a TiCl₄gas is supplied via the first process gas discharge nozzle 11 onto the wafer W to deposit a titanium layer as a mono atomic layer on the nitride layer. A TiN film is therefore formed through a reaction of these materials.
[0044] Further the film-formed wafer W is moved past the Ar gas curtain discharged via the purge gas nozzle [0044] 13. In the same way as set out above, the nitride layer and titanium layer are deposited alternately over the resultant wafer W to sequentially form a stacked layer structure and hence to form a TiN film of a predetermined thickness. In this case, the rotation speed of the wafer holder 3 is determined in accordance with the adsorption speed of the TiCl₄gas and NH₃gas (process gases). The heating temperature of the heater 9 is set to a proper temperature suitable to the reaction of Ti and N.
[0045] In this way, the TiCl[0045] ₄gas and NH₃gas, being supplied via the alternately arranged first and second process gas discharge nozzles 12 into the chamber, are alternately supplied onto the wafer W surface as the wafer holder 3 rotates. This performs the same function as in the case of using a high-speed switching valve. By the ALD method, the mono atomic layer of Ti and mono atomic layer of N are alternately formed over the wafers to provide a desired TiN film.
[0046] Further, a plurality of wafers W are set on the wafer holder [0046] 3 at a time. In one process, a film is formed on these wafers W, thus ensuring high productivity compared with the case where the single wafer processing system.
[0047] Further, the Ar gas is discharged as purge gas from the purge gas nozzle [0047] 13 to provide a gas curtain. The blending of the TiCl₄gas and NH₃gas in the chamber can thereby be reduced to a minimum possible, so that any unwanted product is suppressed from being deposited in the chamber. By blowing the Ar gas as purge gas onto the wafer surface, the process gas can be quickly removed from that surface of the wafer W on which the mono atomic layer has been formed. It is possible to form a film of better quality without any excessive reaction being progressed.
[0048] In this way, the TiN film is repeatedly formed. When an intended film is formed by a film forming process on a plurality of wafers W at a time, a ClF[0048] ₃gas is supplied from the ClF₃supply source 21 through the gas line 25, valve 26 and MFC 27, gas lines 28, 29 and 30, and valves 31 and 35, 32 and 33, gas lines 36, 37, 38, 39 and 40 and gas discharge nozzles 11, 12 and 13 into the chamber 2. A cleaning operation is thereby performed.
[0049] An example of process conditions in this CVD film forming apparatus will be described below. [0049]
[0050] (1) Process Conditions for Forming a TiN Film [0050]
[0051] Flow rate of a TiCl[0051] ₄gas: 1 to 500 sccm (preferably 5 to 20 sccm)
[0052] Flow rate of an NH[0052] ₃gas: 50 to 1000 sccm (preferably 50 to 500 sccm)
[0053] Flow rate of an Ar gas: 10 to 100 sccm (carrier gas: omissible if being small in flow amount) [0053]
[0054] Intra-chamber pressure: 100 mtorrs to 5 torrs (preferably 100 mtorrs to 1 torr) [0054]
[0055] Film forming temperature: 300 to 700° C. (preferably 400 to 600° C.) [0055]
[0056] (2) Condition for a ClF[0056] ₃Cleaning
[0057] Flow rate of a ClF[0057] ₃gas: 100 to 500 sccm (preferably, 200 to 300 sccm)
[0058] Intra-chamber process: 1 torr to 10 torrs (preferably 1 torr to 5 torrs) [0058]
[0059] Process temperature: 200 to 500° C. (preferably, 200 to 300° C.) [0059]
[0060] (3) Purge gas Curtain Condition [0060]
[0061] Flow rate of a purge gas: 100 to 1000 sccm [0061]
[0062] FIG. 4 is a cross-sectional view showing a part of CVD film forming apparatus according to a second embodiment. Here, a wafer holder [0062] 50 is used in place of the wafer holder 3 to rotate wafers W. The wafer holder 50 comprises, for example, four (only two are shown) holders 52. The holders 52 are arranged over a base section 5 and can rotate. By rotating these wafer holders 52 by a motor 53, the wafer W on the holder 52 is rotated. By doing so, TiCl₄gas and NH₃gas can be supplied as process gases onto the wafers W more uniformly.
[0063] A heater [0063] 8 may be set below the wafer holder as shown in FIG. 1. In this case, the heating efficiency is lowered. In this embodiment, it is preferable that a heater support section 54 for support a heater 55 be provided above the wafer W.
[0064] In the case where the heater [0064] 55 is provided in this way, many gas-passable holes are preferably provided in the heater 55 and heater holding member 54 to supply the process gas effectively onto the wafer W.
[0065] FIG. 5 is a cross-sectional view showing a part of a CVD film forming apparatus according to a third embodiment. In this embodiment, TiCl[0065] ₄gas and NH₃gas used as process gases are supplied via shower heads 60 and 61 onto wafers W.
[0066] The shower head [0066] 60 has a disk-like hollow body 60 a. The body 60 a has many gas discharge holes 60 b in its lower surface as shown in FIG. 6. Through the holes 60 b, gas is uniformly discharged into a chamber. The shower head 61 is also formed as described above in connection with the shower head 60. By using the shower head in place of the nozzles it is possible to supply a TiCl₄gas and NH₃gas uniformly onto the wafer W.
[0067] FIG. 7 is a cross-sectional view showing a part of a CVD film forming apparatus according to a fourth embodiment. In this embodiment, exhaust holes [0067] 70 are provided beneath first and second process gas discharge nozzles 11 and 12. In FIG. 7, only the exhaust hole corresponding to the first processing gas discharge nozzle 11 is shown.
[0068] By this structure it is possible to quickly discharge unrequired TiCl[0068] ₄gas and NH₃gas through exhaust pipe 71 attached to the exhaustion holes 70.
[0069] The present invention is not limited to the above-mentioned embodiments. Various changes and modifications can be made without departing from the scope of the invention. Although forming a TiN film formed in the above-mentioned embodiment, it is possible to form a film of TaN, SiO[0069] ₂, SiN, SiON, SiOF, WN, Wsi, RuO₂or the like.
[0070] The heater has been explained as located below the wafer in the example of FIG. 1 and above the wafer in the example of FIG. 4 alternatively, it may be provided both below and above the wafer and in any other proper position so long as uniform heating is possible. [0070]
[0071] Although the Ar gas is used as a purge gas, other proper gases such as an N[0071] ₂gas may be used. Further, if the two kinds of process gases as set out above can be effectively shut off, it is not necessary to use any purge gas. Further, as a substrate, not only the semiconductor wafer but also other objects may be used and it may be possible to use a substrate having another layer formed on its surface.
[0072] According to the present invention, as set out above, the following advantages can be obtained: [0072]
[0073] 1. Upon the formation of CVD films by the use of the ALD method, the wafers, while being supplied with the first and second process gases from the alternately arranged first and second process gas discharge sections, are moved past these alternately arranged sections. This operation is the same as in the case of using a high-speed switching valve. By doing so, a mono atomic layer is alternately deposited onto the wafers by the first and second process gases to form a film on the surface of the wafers through a reaction involved. By doing so it is also possible to form a metallic compound film on the wafers. [0073]
[0074] 2. In the CVD film forming apparatus, the first and second process gas discharge sections are alternately arranged in a circumferential manner. It is, therefore, possible to process a plurality of substrates at a time and to form an intended film on the substrates in high productivity. [0074]
[0075] 3. Since an air curtain is formed by the purge gas between the first process gas discharge section and the second process gas discharge section, a plurality of process gases can be introduced within the same chamber to deposit different films over the wafers. Further, the process gases are exhausted in not-crossed directions and it is possible, therefore, to suppress the depositing of any unwanted product. [0075]
[0076] 4. In order to move the wafers across the process gas introducing zones within the chamber, use is made of the rotation mechanism with the wafers held thereon. By doing so, it is possible to easily move the wafers past those positions just below the process gas discharge sections and to positively form a mono atomic layer over the wafers. [0076]
[0077] 5. Since the “rotating” wafers themselves are “revolved”, it is possible to enhance the uniformity with which films are formed. [0077]
[0078] A purge gas discharge section is provided between the first process gas discharge section and the second process gas discharge section. The purge gas discharge section applies a stream of gas that works as an air curtain. [0078]
[0079] Additional advantages and modifications will readily occur to those skilled in the art. Therefore, the invention in its broader aspects is not limited to the specific details and representative embodiments shown and described herein. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents. [0079]

权利要求:
Claims (14)
[1" id="US-20010007244-A1-CLM-00001] 1. A film forming apparatus comprising:
a chamber for holding substrates;
a substrate holding section for holding these substrates in the chamber;
a plurality of first process gas discharge sections provided in those positions facing film forming surfaces of the substrates within the chamber, for discharging a first process gas;
a plurality of second process gas discharge sections provided in those positions different from those of the first process gas discharge sections within the chamber, for discharging a second process gas;
a rotation mechanism for rotating the substrate holding section; and
a heating section for heating the substrate, wherein, while the substrates caused are rotating as the substrate holding section rotates, films are alternately formed as a mono atomic layer by the first process gas and as a mono atomic layer by the second process gas on the corresponding substrates.
[2" id="US-20010007244-A1-CLM-00002] 2. The apparatus according to
claim 1 , wherein the first and second process gas discharge sections are alternately arranged so that the centers of their discharge outlets are aligned with the centers of the substrates on a circumference along which the substrates are rotationally moved.
[3" id="US-20010007244-A1-CLM-00003] 3. The apparatus according to
claim 1 , wherein a purge gas discharge section is provided between the first process gas discharge section and the second process gas discharge section to provide a purge gas stream as an air curtain.
[4" id="US-20010007244-A1-CLM-00004] 4. The apparatus according to
claim 1 , wherein the rotation mechanism further has a substrate rotation mechanism for rotating the substrate per se while being held.
[5" id="US-20010007244-A1-CLM-00005] 5. The apparatus according to
claim 1 , wherein the heating means is provided in a position where the substrate is heated from either above or below the substrate holding member.
[6" id="US-20010007244-A1-CLM-00006] 6. The apparatus according to
claim 1 , wherein the heating means is provided from both below and above the substrate holding member.
[7" id="US-20010007244-A1-CLM-00007] 7. The apparatus according to
claim 1 , wherein the first process gas contains any one of elements Ti, Ta, Si, W and Ru, and the second process gas contains N or O.
[8" id="US-20010007244-A1-CLM-00008] 8. The apparatus according to
claim 7 , wherein the first and second process gases are applied, forming a film of a metal compound selected from the group consisting of Al₂O₃, ZrO₂, TiN, TaN, SiO₂, SiN, SiON, SiOF, WN, WSi and RuO₂.
[9" id="US-20010007244-A1-CLM-00009] 9. A CVD film forming method comprising the steps of:
dividing an interior of a chamber into a plurality of space areas by an air curtain of a gas stream discharged into a chamber;
repeatedly moving substrates past atmospheres created by a plurality of process gases introduced into the space areas; and,
thereby, sequentially depositing a mono atomic layer over the substrates to provide a stacked layer and hence a compound film on the substrates through a reaction involved under heating.
[10" id="US-20010007244-A1-CLM-00010] 10. A film forming method comprising the steps of:
arranging a plurality of substrates in a plane within a chamber;
discharging first and second process gases, under a revolution of these substrate, from first and second gas discharge sections provided in mutually different positions within the chamber;
thereby sequentially alternately forming a mono atomic layer by the first process gas and a mono atomic layer by a second process gas on the substrates.
[11" id="US-20010007244-A1-CLM-00011] 11. The method according to
claim 10 , wherein the revolved substrates are rotated.
[12" id="US-20010007244-A1-CLM-00012] 12. The method according to
claim 10 , wherein the revolving speed of the substrates is determined in accordance with the speeds with which the first and second process gases are adsorbed on the substrates.
[13" id="US-20010007244-A1-CLM-00013] 13. The method according to
claim 9 , wherein the first process gas contains any one of elements Ti, Ta, Si, W and Ru, and the second process gas contains N or O.
[14" id="US-20010007244-A1-CLM-00014] 14. The method according to
claim 10 , wherein the first process gas contains any one of elements Ti, Ta, Si, W and Ru, and the second process gas contains N or O.

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法律状态:
2001-01-03| AS| Assignment|Owner name: TOKYO ELECTRON LIMITED, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MATSUSE, KIMIHIRO;REEL/FRAME:011420/0720 Effective date: 20001215 |

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2014-11-13| FPAY| Fee payment|Year of fee payment: 12 |

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申请号 | 申请日 | 专利标题

JP2000000590||2000-01-06||

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