WO2010013661A1 - 基板の洗浄方法、基板の洗浄装置及び記憶媒体 - Google Patents
基板の洗浄方法、基板の洗浄装置及び記憶媒体 Download PDFInfo
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- WO2010013661A1 WO2010013661A1 PCT/JP2009/063329 JP2009063329W WO2010013661A1 WO 2010013661 A1 WO2010013661 A1 WO 2010013661A1 JP 2009063329 W JP2009063329 W JP 2009063329W WO 2010013661 A1 WO2010013661 A1 WO 2010013661A1
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Images
Classifications
-
- 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
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
-
- 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
- H01L21/02041—Cleaning
- H01L21/02057—Cleaning during device manufacture
- H01L21/0206—Cleaning during device manufacture during, before or after processing of insulating layers
- H01L21/02063—Cleaning during device manufacture during, before or after processing of insulating layers the processing being the formation of vias or contact holes
-
- 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
- H01L21/02041—Cleaning
- H01L21/02057—Cleaning during device manufacture
-
- 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
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67028—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like
- H01L21/6704—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for wet cleaning or washing
- H01L21/67051—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for wet cleaning or washing using mainly spraying means, e.g. nozzles
Definitions
- the present invention relates to a substrate having a pattern formed on a surface and used for manufacturing a semiconductor device, for example, a cleaning method for cleaning a semiconductor wafer, a substrate cleaning apparatus, and a storage medium storing the cleaning method.
- a pattern and the formation of a thin film are repeated on the surface of a semiconductor wafer (hereinafter referred to as a wafer) which is a substrate to form a laminated structure of integrated circuits.
- This pattern includes a step of forming a resist mask by photolithography, a step of etching a thin film under the layer using the mask by, for example, plasma to form a pattern corresponding to the mask, and a resist mask by plasma containing oxygen. And an ashing process for ashing.
- a cleaning liquid is supplied to the surface of the wafer to wash away the residues.
- a cleaning liquid such as pure water onto the surface of the wafer from above the wafer and rotate the wafer, for example, from the center of the wafer toward the outer periphery.
- the residue is washed away with the cleaning liquid.
- the cleaning liquid remaining on the surface of the wafer and the inside of the groove is removed by rotating the wafer and shaking off the cleaning liquid or by heating the wafer and evaporating the cleaning liquid remaining on the surface.
- the shape of the pattern varies depending on the part of the device. As a specific example, when a wiring pattern is formed in an insulating film, line and space (a large number of line-shaped convex portions and groove portions are formed in parallel). Pattern). A pattern formed as a line and space often includes a region having a high pattern density and a region having a low pattern density. FIG. 17A shows an example of such a pattern. As described above, for example, a dense region 103 in which the opening width of the groove 101 is narrow and the lines 102 are densely arranged on the surface of the wafer 100; And a sparse region 104 in which the opening width of the groove 101 is formed wider than the dense region 103 and the lines 102 are spaced apart from each other. In addition, 105 in FIG. 17A is a residue.
- the cleaning liquid remaining on the surface of the wafer 100 after cleaning the wafer 100 tends to become approximately horizontal so that the surface area becomes small in the groove 101 due to surface tension, for example. Therefore, a lateral force is applied to the line 102 so as to be drawn toward the cleaning liquid side (the groove 101 side) due to the surface tension of the cleaning liquid.
- the cleaning liquid on the surface of the wafer 100 in this state is to be removed or dried, the distance between the lines 102 and 102 in the dense region 103 is narrow, so that the surface tension works strongly and the cleaning solution comes out from the dense region 103.
- it is difficult (it is difficult to dry) the surface tension is weaker than that of the dense region 103 because the gap between the lines 102 and 102 is wide in the sparse region 104.
- the cleaning liquid disappears (drys) faster than the dense region 103. Then, as shown in FIG. 17B, when the cleaning liquid remains in the dense area 103, but the cleaning liquid disappears in the sparse area 104 or becomes less than the dense area 103, for example, the line 102 at the boundary between both areas 103 and 104 becomes The force drawn from the dense region 103 side (left side in FIG. 17B) is stronger than the force drawn from the sparse region 104 side (right side in FIG. 17B).
- the line 102 is highly integrated, for example, the width dimension is often extremely narrow until it falls below 100 nm. For this reason, the strength of the line 102 is weak, and in the case of a porous film having a low dielectric constant (for example, a SiCOH film) made of a porous material used as an interlayer insulating film, the line 102 is fragile. Therefore, if there is a difference in the force attracted from both sides in this way, it will fall to the side strongly pulled as shown in FIG. 17C (left side in FIG. 17C).
- a porous film having a low dielectric constant for example, a SiCOH film
- the cleaning liquid removal (drying) speed varies slightly, for example, between the grooves 101 in the regions 103 and 104. Therefore, even in the regions 103 and 104 where the arrangement density of the line 102 is the same, the line 102 may fall down after the cleaning liquid is removed (dried).
- the above-described resist mask has a line width dimension and a groove opening dimension of about 32 nm, and a line height dimension (groove depth dimension) of, for example, 120 nm. In some cases, it is formed as a mask pattern having a finer dimension than the above pattern.
- a mask pattern is formed by performing development processing on the resist mask, an organic substance constituting the resist mask or a residue of the organic substance may remain on the surface of the mask pattern or in the groove of the mask pattern. Therefore, the substrate is cleaned after the development processing, but the resist mask is organic and has low hardness, and the line may fall down when the cleaning solution is removed (dried).
- a shape other than the shape extending long like the line 102 along the surface of the substrate there is a shape other than the shape extending long like the line 102 along the surface of the substrate.
- a columnar structure 110 such as a gate electrode is formed.
- a cylinder-type (cylindrical) electrode 111 may be formed on the upper layer side of the gate electrode.
- a cleaning process may be performed on the wafer 100 on which the pattern having such a shape is formed in order to remove, for example, a residue generated by the etching process.
- the cleaning liquid is removed (dried) in this cleaning process, the convex portions (structure 110, electrode 111) may fall down. Further, as the wiring density increases, the width of the convex portion of such a pattern becomes thinner, and the problem of falling becomes prominent.
- an organic solvent that has a low boiling point such as alcohol and is easy to remove (evaporate) is supplied to the wafer with the cleaning liquid remaining on the surface, and the cleaning liquid on the wafer is replaced with the organic solvent and then dried.
- a method for quickly removing moisture (cleaning liquid or organic solvent) from the surface of the wafer is supplied to the wafer with the cleaning liquid remaining on the surface, and the cleaning liquid on the wafer is replaced with the organic solvent and then dried.
- a method for quickly removing moisture (cleaning liquid or organic solvent) from the surface of the wafer since the organic solvent has surface tension, the convex portion may fall down due to the surface tension of the organic solvent when the organic solvent is removed or dried.
- a method of reducing the surface tension of the cleaning liquid by, for example, mixing a surface active agent with the cleaning liquid. However, if this surface active agent remains on the surface of the wafer after cleaning, contamination of the wafer is prevented. It becomes a cause.
- a method is known in which water vapor, which is a gas, is supplied to the surface of the wafer and the wafer is cleaned with this water vapor.
- a gas alone is not sufficient to remove the aforementioned residue.
- a method of supplying a mist (droplet) cleaning liquid to the surface of the wafer to clean the wafer is also known, but since the cleaning liquid has surface tension even in the mist state, for example, in the groove When this mist enters, a lateral force is applied to the line, and when the mist is agglomerated on the wafer, when the mist is dried, for example, a line is formed as in the example shown in FIG. It will fall down.
- JP6-196397A paragraphs 0004 and 0005 describes a technique for cleaning a substrate by heating the substrate or the liquid to 50 ° C. to 100 ° C. so that the surface tension of the liquid is reduced. The surface tension is only slightly reduced and the above problem cannot be solved.
- the present invention has been made in view of such circumstances, and an object thereof is to suppress pattern collapse when supplying a cleaning liquid to a substrate for manufacturing a semiconductor device having a pattern formed on the surface to clean the substrate.
- An object of the present invention is to provide a cleaning method, a cleaning apparatus, and a storage medium storing the cleaning method.
- a substrate cleaning method includes: A step of placing a substrate for a semiconductor device having a pattern formed on the surface thereof on a placement table in a processing container; Heating the substrate; Then, supplying a liquid cleaning liquid to the surface of the substrate, In the step of supplying the cleaning liquid, the substrate is heated in the step of heating the substrate such that a Leidenfrost phenomenon occurs and the cleaning liquid vapor is interposed between the droplet of the cleaning liquid supplied to the substrate and the substrate. Heated.
- the cleaning liquid may be supplied while rotating the substrate about the vertical axis.
- the cleaning liquid may be supplied to the substrate in a mist form.
- the substrate may be heated by a heating mechanism provided in the mounting table.
- the substrate is heated to 140 ° C. to 300 ° C., and in the step of supplying the cleaning liquid, water is added to the cleaning liquid in an air atmosphere.
- the substrate cleaning method according to one embodiment of the present invention may further include a step of decompressing the inside of the processing container before the step of supplying the cleaning liquid to the substrate.
- the cleaning liquid may be at least one of water and an organic solvent.
- a method for cleaning a substrate includes: A step of placing a substrate for a semiconductor device having a pattern formed on the surface thereof on a placement table in a processing container; Then, supplying a cleaning liquid to the surface of the substrate, In the step of supplying the cleaning liquid, a Leidenfrost phenomenon occurred and the cleaning liquid vapor was interposed between the liquid droplets of the cleaning liquid supplied to the substrate and the substrate, and was placed on the mounting table. A liquid having a boiling point lower than the temperature of the substrate is supplied as the cleaning liquid.
- the cleaning liquid may be one or more selected from the group consisting of liquid nitrogen, liquid argon, liquid oxygen, liquid krypton, liquid xenon, and liquid carbon dioxide.
- the cleaning liquid may be supplied while rotating the substrate about the vertical axis.
- the cleaning liquid may be supplied to the substrate in a mist form.
- the substrate cleaning method according to another aspect of the present invention may further include a step of decompressing the inside of the processing container before the step of supplying a cleaning liquid to the substrate.
- a substrate cleaning apparatus includes: A processing container having therein a mounting table configured to mount a substrate for a semiconductor device having a pattern formed on the surface; A cleaning liquid supply member that supplies a liquid cleaning liquid for cleaning the substrate to the substrate on the mounting table; A heating mechanism for heating the substrate on the mounting table such that a vapor of the cleaning solution is interposed between a droplet of the cleaning solution supplied to the substrate due to a Leidenfrost phenomenon and the substrate on the mounting table And comprising.
- the substrate cleaning apparatus may further include a rotation mechanism that rotates the mounting table about the vertical axis.
- the cleaning liquid supply member may be configured to supply the cleaning liquid in a mist form.
- the heating mechanism may be provided on the mounting table.
- a substrate cleaning apparatus includes: A processing container having therein a mounting table configured to mount a substrate for a semiconductor device having a pattern formed on the surface; A cleaning liquid supply member for supplying a cleaning liquid for cleaning the substrate to the substrate on the mounting table, The cleaning liquid supply member has a temperature of the substrate placed on the mounting table so that a vapor of the cleaning liquid is interposed between a droplet of the cleaning liquid supplied to the substrate due to a Leidenfrost phenomenon and the substrate. A liquid having a lower boiling point is supplied as the cleaning liquid.
- the cleaning liquid may be one or more selected from the group consisting of liquid nitrogen, liquid argon, liquid oxygen, liquid krypton, liquid xenon, and liquid carbon dioxide.
- the substrate cleaning apparatus according to another aspect of the present invention may further include a rotation mechanism that rotates the mounting table about the vertical axis.
- the cleaning liquid supply member may be configured to supply the cleaning liquid in a mist form.
- a storage medium includes: A storage medium storing a program executed by a control device that controls the cleaning device, When the program is executed by the control device, the cleaning device performs any one of the above-described substrate cleaning methods according to one embodiment of the present invention.
- a storage medium includes: A storage medium storing a program executed by a control device that controls the cleaning device, When the program is executed by the control device, the cleaning device performs any one of the above-described substrate cleaning methods according to another aspect of the present invention.
- a Leidenfrost phenomenon occurs, and the cleaning liquid is interposed between the substrate and a droplet of the cleaning liquid.
- the substrate is heated so that the vapor of the water is interposed. Therefore, when the cleaning liquid is supplied to the heated substrate, for example, the liquid droplets of the cleaning liquid slightly float from the substrate due to the vapor between the substrate and the liquid droplets of the cleaning liquid. As a result, contact between the cleaning liquid and the substrate can be suppressed, and the surface tension of the cleaning liquid does not affect the substrate, or the surface tension of the cleaning liquid does not significantly affect the substrate.
- the vapor is vigorously sprayed onto the surface of the substrate from the lower surface side of the droplet of the cleaning liquid, deposits such as residues on the substrate are lifted upward by the vapor and taken into the cleaning liquid, for example. For this reason, the substrate can be cleaned while suppressing the collapse of the convex portions of the pattern.
- FIG. 1A is a schematic diagram of droplets of a cleaning liquid for explaining the Leidenfrost phenomenon.
- FIG. 1B is a schematic view of a cleaning liquid droplet for explaining the Leidenfrost phenomenon.
- FIG. 2 is a schematic diagram of cleaning liquid droplets for explaining the Leidenfrost phenomenon.
- FIG. 3 is a characteristic diagram for explaining one condition in which the Leidenfrost phenomenon occurs.
- FIG. 4 is a longitudinal sectional view showing an example of a cleaning apparatus for carrying out the cleaning method according to the embodiment.
- FIG. 5 is an enlarged view showing an example of a mounting table of the cleaning apparatus shown in FIG.
- FIG. 6A is a longitudinal sectional view for explaining an example of a substrate to be cleaned.
- FIG. 6B is a longitudinal sectional view for explaining an example of a substrate to be cleaned.
- FIG. 6C is a longitudinal sectional view for explaining an example of a substrate to be cleaned.
- FIG. 7 is a schematic diagram showing how the substrate is cleaned.
- FIG. 8A is a longitudinal sectional view showing a substrate being cleaned.
- FIG. 8B is a longitudinal sectional view showing the substrate being cleaned.
- FIG. 8C is a longitudinal sectional view showing the substrate being cleaned.
- FIG. 9A is a longitudinal sectional view showing a substrate being cleaned.
- FIG. 9B is a longitudinal sectional view showing the substrate being cleaned.
- FIG. 10A is a longitudinal sectional view showing a substrate being cleaned.
- FIG. 10B is a longitudinal sectional view showing the substrate being cleaned.
- FIG. 10A is a longitudinal sectional view showing a substrate being cleaned.
- FIG. 10B is a longitudinal sectional view showing the substrate being cleaned.
- FIG. 10A is a longitudinal sectional view showing
- FIG. 10C is a longitudinal sectional view showing the substrate being cleaned.
- FIG. 11 is a longitudinal sectional view showing the substrate being cleaned.
- FIG. 12 is a schematic diagram showing how the substrate is cleaned.
- FIG. 13 is a longitudinal sectional view showing an example of a cleaned substrate.
- FIG. 14A is a longitudinal sectional view for explaining another example of the substrate to be cleaned.
- FIG. 14B is a longitudinal sectional view for explaining another example of the substrate to be cleaned.
- FIG. 15 is a view corresponding to FIG. 4 and a longitudinal sectional view showing another example of the cleaning apparatus.
- FIG. 16 is a side view showing a modification of the heating mechanism of the cleaning device.
- FIG. 17A is a longitudinal sectional view showing a substrate being cleaned by a conventional cleaning method.
- FIG. 17A is a longitudinal sectional view showing a substrate being cleaned by a conventional cleaning method.
- FIG. 17B is a longitudinal sectional view showing a substrate being cleaned by a conventional cleaning method.
- FIG. 17C is a longitudinal sectional view showing a substrate being cleaned by a conventional cleaning method.
- FIG. 18A is a perspective view showing an example of a pattern formed on the surface of the substrate.
- FIG. 18B is a perspective view showing another example of the pattern formed on the surface of the substrate.
- FIG. 19 is a graph showing the number of particles adhering to the test wafer before and after the cleaning process.
- FIG. 20 is a diagram showing the positions of particles adhering to the test wafer before and after the cleaning process.
- a mist-like cleaning liquid such as pure water is supplied to a semiconductor wafer (hereinafter referred to as “wafer”) W, which is a substrate for manufacturing a semiconductor device, and the surface tension of the pure water is the wafer.
- wafer W semiconductor wafer
- the Leidenfrost phenomenon is a phenomenon that occurs, for example, when a water droplet is dropped on a heated frying pan. As shown in FIG.
- the cleaning liquid is the above-described droplet 1 or mist on the wafer W.
- the vapor is interposed between the wafer W and the droplet 1, the droplet 1 is slightly lifted from the wafer W. Therefore, as will be described later, when the pattern 43 (53) is formed on the surface of the wafer W, the cleaning liquid does not enter the pattern 43, or even if it enters, it immediately evaporates or jumps out. Therefore, the lateral force based on the surface tension of the cleaning liquid interposed between the lines 102 described in the background art section does not act on the line 42 (52). Further, since the vapor is interposed between the wafer W and the droplet 1, the heat of the wafer W is transferred to the droplet 1 through this vapor, so that the wafer W and the droplet 1 are in direct contact with each other.
- the droplet 1 does not evaporate immediately, but gradually evaporates and stays on the wafer W for a long time while gradually decreasing as shown on the right side of FIG. 1B.
- the droplet 1 may generate a small droplet 1 by, for example, partly splitting on the wafer W.
- the vapor of the droplet 1 is interposed between the small droplet 1 and the wafer W.
- the vapor is a gas and cannot be visually observed when it is not condensed, but in FIG. 1A and FIG. 1B, this vapor is schematically drawn. The same applies to the subsequent figures.
- the temperature of the wafer W is a temperature at which the Leidenfrost phenomenon does not occur, for example, a temperature lower than the boiling point of the cleaning liquid, vapor does not intervene between the droplet 1 and the wafer W as shown in FIG.
- the wafer W and the droplet 1 are in direct contact. Therefore, since the heat of the wafer W is immediately transmitted to the droplet 1, the droplet 1 is immediately evaporated.
- this Leidenfrost phenomenon may not occur depending on conditions such as temperature and pressure.
- this condition varies depending on the type of liquid used as the cleaning liquid. Therefore, when cleaning the wafer W using this phenomenon, for example, it is necessary to investigate the temperature at which this phenomenon occurs. Specifically, for example, the wafer W is heated to a predetermined temperature, and a predetermined amount of droplets 1 that are liquids used as a cleaning liquid are dropped on the wafer W, and the time until the droplets 1 are completely eliminated. Measure. Then, by performing the same measurement while changing the temperature of the wafer W in various ways, it can be seen how the time required for the evaporation of the droplet 1 varies depending on the temperature. FIG.
- the time required for evaporation of the droplet 1 gradually increases as the temperature of the wafer W rises. This is because the heat of the wafer W is difficult to be transferred to the droplet 1 because the vapor of the droplet 1 is interposed between the wafer W and the droplet 1 as described above.
- the temperature range it is considered that the vapor layer interposed between the wafer W and the droplet 1 gradually increases as the temperature increases. Therefore, it can be seen that in this temperature range, the droplet 1 slightly floats from the wafer W, and the droplet 1 does not cause or does not easily cause the convex portion of the pattern of the wafer W to collapse.
- the Leidenfrost phenomenon is considered to occur even at a temperature of 300 ° C. or higher.
- the wafer W is cleaned in the above temperature range (140 ° C. to 300 ° C.). Preferably it is done. Even within this temperature range, it is preferable that the temperature be close to a low temperature (140 ° C.) when cleaning a resist or the like that is sensitive to heat.
- the pressure of the cleaning solution decreases as the pressure decreases (the degree of vacuum increases), and the evaporation tends to evaporate. As the pressure increases, the boiling point increases and the evaporation becomes difficult. You may adjust so that a phenomenon may occur.
- the cleaning apparatus includes a processing container 11 that is a casing, and a mounting table 12 disposed in the processing container 11.
- the mounting table 12 is configured to be rotatable around a vertical axis by a rotating mechanism 12c including a belt 12a and a motor M that form a transmission mechanism, for example, via a rotating shaft 12b having a hollow inside.
- a heater 13 that is a heating mechanism for heating the wafer W is embedded in the mounting table 12.
- one end side of a suction path 60 that forms a vacuum chuck for sucking and holding the wafer W from the back surface side is opened at a plurality of locations on the surface of the mounting table 12, and the other end side of the suction path 60.
- the tip is bent horizontally, and is opened outward at a lateral position of the rotary shaft 12b.
- an annular body 61 having a hollow interior surrounding the middle portion of the rotary shaft 12b in the circumferential direction is provided around the rotary shaft 12b so as to cover the opening 60a of the suction path 60 that opens to the side position of the rotary shaft 12b.
- the annular body 61 is provided, for example, fixed to the lower surface of the processing container 11 by a support portion (not shown).
- a bearing mechanism 62 including a magnetic seal or the like is provided between the annular body 61 and the rotating shaft 12b in an airtight manner. Even when the rotating shaft 12b rotates about the vertical axis, a space in which the opening 60a communicates. (Internal space of the annular body 61) is configured to be kept airtight.
- One end side of the suction pipe 63 is connected to a side position of the annular body 61, and the other end side of the suction pipe 63 is connected to, for example, a suction pump (not shown) provided outside the processing container 11. ing. And, even when the mounting table 12 and the rotating shaft 12b are rotated around the vertical axis by the suction pipe 63, the internal space of the annular body 61 and the suction path 60, the mounting table is sucked from the back side. 12 can be sucked and held.
- a feeding shaft 65 extending coaxially with the rotating shaft 12b from the bottom surface side of the processing container 11 to a position below the mounting table 12 is provided.
- the outer tube 65a on the outer peripheral side of the power supply shaft 65 and the inner shaft portion 65b are insulated so as not to electrically interfere with each other.
- the outer tube 65a and the shaft portion 65b on the upper end side of the power supply shaft 65 A pair of conductive paths 64 and 64 for supplying power to the heater 13 described above are connected to each other.
- a substantially cylindrical connector 66 is connected to the lower end side of the power supply shaft 65, and the connector 66 is connected to, for example, an electrically conductive fluid or an upper rotating portion electrically connected via a conductive bearing. 66a and a lower fixed portion 66b.
- the power feeding shaft 65 is configured to be rotatable around the vertical axis together with the mounting table 12 and the rotating portion 66a while being electrically connected to the connector 66.
- FIG. 4 shows the mounting table 12 in a simplified manner.
- the mounting table 12 includes, for example, lifting pins 68 for moving the wafer W up and down between a lower position where the wafer W is mounted on the mounting table 12 and an upper position where the wafer W is loaded and unloaded.
- the elevating pins 68 are connected to an elevating mechanism 69 provided on the lower surface of the processing container 11, for example, via a support portion 68a. Then, in the state where the lifting pins 68 are lifted and lowered through a through hole (not shown) formed in the mounting table 12, an external conveying means (not shown) and the mounting table via a transfer port 11 a formed in the side wall of the processing container 11. The wafer W is delivered to and from 12.
- an approximately ring-shaped cup body 15 having an upper surface opened is provided so as to surround the mounting table 12 from the side, and on the outer peripheral side of the lower surface of the cup body 15, a wafer is provided.
- a liquid receiving portion 16 is formed along the periphery of the wafer W for receiving the cleaning liquid that has flowed down from the peripheral edge of the W.
- a drainage path 17 for discharging the cleaning liquid to the outside of the processing container 11 is connected to the lower surface side of the liquid receiving portion 16.
- an exhaust passage 19 is formed that is partitioned from the liquid receiving portion 16 by a ring-shaped wall portion 18.
- a cup body 15 is provided on the lower surface side of the exhaust passage 19.
- An exhaust pipe 20 for exhausting the atmosphere in the processing container 11 is connected via a ring-shaped region between the wafer W and the peripheral edge of the wafer W and the liquid receiving portion 16.
- a nozzle 21 serving as a cleaning liquid supply member for supplying a mist-like cleaning liquid, for example, pure water, to the wafer W on the mounting table 12 is provided so as to face the mounting table 12.
- the nozzle 21 is supported by an arm 22 configured to be horizontally movable by a moving mechanism (not shown). For example, the nozzle 21 can move in the horizontal direction from the upper position of the center of the wafer W on the mounting table 12 toward the outer edge.
- the nozzle 21 is connected to a cleaning liquid supply unit 25 in which a cleaning liquid such as pure water is stored via a flow rate adjusting unit 23a and a valve 24a, and a carrier gas such as nitrogen (N2) is connected to the nozzle 21 via a flow rate adjusting unit 23b and a valve 24b. ) It is connected to a carrier gas supply unit 26 in which gas is stored.
- the nozzle 21 is configured so that the cleaning liquid can be atomized in the form of a mist with the carrier gas and supplied to the wafer W, for example.
- a filter unit 27 is provided on the top wall in the processing container 11, and the filter unit 27, an exhaust port (not shown) provided outside the cup body 15, and the exhaust pipe 20, enter the processing container 11. A downflow is formed.
- a control device 7 is connected to the cleaning device, and the control device 7 includes, for example, a computer having a CPU, a memory, a program, and the like (not shown).
- This program includes a group of steps (commands) for outputting a control signal to each part of the cleaning apparatus so as to clean the wafer W in the cleaning apparatus.
- the program includes, for example, a hard disk, a compact disk, and a magnet optical.
- the data is stored in a storage medium 8 that is a storage unit such as a disk or a memory card, and installed in the computer from the storage medium 8.
- the wafer W to be cleaned in the cleaning method according to the present embodiment will be described with reference to FIGS. 6A to 6C.
- the wafer W extends long between the grooves 41 and 41, a low dielectric constant film 31 made of, for example, a silicon compound (SiO 2 or SiCOH) as an interlayer insulating film.
- a photoresist film 32 on which a pattern 43 including a line 42 formed as a convex portion is formed is laminated on the lower silicon layer 33 in this order from the lower side.
- the wafer W has a narrow area 44 in which the opening width of the groove 41 is formed narrowly and the lines 42 are densely arranged, and a wide opening width of the groove 41 is formed and the line 42 is greatly separated. And a sparse region 45 arranged sparsely.
- FIG. 6A the dimensions of the pattern 43 are schematically shown. The same applies to FIGS. 6B, 6C, 8A to 11, and 13 to 14B below.
- the low dielectric constant film 31 is etched as shown in FIG. 6B.
- the low dielectric constant film 31 is formed with a pattern 53 including a groove 51 and a line 52 having a shape corresponding to the pattern 43, and similarly, a dense region 54 in which the lines 52 are densely arranged and A sparse region 55 in which the lines 52 are sparsely arranged is formed.
- the dimensions of the pattern 53 are, for example, the width dimension of the line 52 and the height dimension of the line 52 (depth dimension of the groove 51), for example, about 90 nm, respectively, and the distance between the lines 52, 52 in the dense region 54 (groove 51). Is 90 nm, and the distance between the lines 52 and 52 in the sparse region 55 is 270 nm.
- oxygen (O 2 ) gas and dilution gas are converted into plasma on the wafer W, and the plasma is supplied to perform ashing, thereby remaining in the upper layer of the low dielectric constant film 31 as shown in FIG. 6C.
- Unnecessary photoresist film 32 is removed. By this ashing process, a residue 34 of the photoresist film 32 remains on the surface of the low dielectric constant film 31 and the inside of the groove 51 as shown in FIG. 6C.
- the residue 34 on the wafer W is removed (cleaned) as follows.
- the wafer W is loaded into the processing container 11 by an external transfer unit (not shown), and the wafer W is mounted on the mounting table 12 by the cooperative action of the lifting mechanism 69 and the transfer unit.
- the wafer W is sucked and held on the mounting table 12 by suction of the suction path 60.
- the wafer W is heated to a predetermined temperature such as 140 ° C. to 300 ° C., preferably 160 ° C. to 200 ° C. so that the Leidenfrost phenomenon occurs on the surface of the wafer W, and the wafer W is rotated as shown in FIG.
- a mist-like cleaning liquid is supplied from the nozzle 21 to the center of the wafer W, for example.
- the droplet (mist) 1 of the cleaning liquid supplied to the surface of the wafer W has the Leidenfrost phenomenon as described above. Since it is heated to occur, the vapor of the droplet 1 is interposed between the droplet 1 and the surface of the wafer W (low dielectric constant film 31) as shown in FIG. 8A. Therefore, the droplet 1 is slightly lifted from the surface of the wafer W, and the surface tension due to the contact between the droplet 1 and the wafer W does not work, or even if the surface tension works, it becomes extremely small.
- the surface of the wafer W (line 52) is caused by the flow of the vapor.
- the surface (residue) 34 is rolled up and taken into the droplet 1 as shown in FIG. 8B.
- the droplet 1 of the cleaning liquid supplied to the surface of the wafer W rolls from the center side toward the outer peripheral side by centrifugal force. Then, for example, when the droplet 1 reaches above the groove 51, as shown in FIG. 8C, similarly, steam is vigorously sprayed from the lower surface of the droplet 1 toward the surface of the wafer W (the bottom surface of the groove 51). Therefore, the residue 34 inside the groove 51 is rolled up by the flow of the vapor, and the residue 34 is similarly taken into the droplet 1 as shown in FIG. 9A.
- the droplet 1 is actually much larger than the dimensions shown in FIGS. 8A to 9B, and the dimension of the pattern 53 is larger than the dimensions shown in FIGS. 8A to 9B. Much smaller. Therefore, even when the height is different, such as the surface of the wafer W (the upper surface of the line 52) or the bottom surface of the groove 51, the size of the droplet 1 and the vapor layer formed on the lower surface of the droplet 1 In terms of thickness, such a height difference is almost negligible. Therefore, the residue 34 is taken into the droplet 1 over the surface of the wafer W and the bottom surface of the groove 51 by the steam blown from the lower surface of the droplet 1. Then, as shown in FIG. 9B, the droplets 1 are sequentially rolled from the center side to the peripheral side of the wafer W, and the residue 34 is taken into the droplets by the steam blown from the lower surface of the droplets 1. .
- the wafer W is heated so that the Leidenfrost phenomenon occurs on the wafer W, and the droplet 1 that has taken in the residue 34 is removed from the wafer W by the vapor intervening between the droplet 1 and the wafer W. Since the heat transfer is hindered, it does not evaporate immediately after being dropped onto the wafer W. Further, even if the surface tension does not work due to the heating of the wafer W or even if the surface tension works, the droplet 1 is easy to roll on the wafer W. Therefore, the droplet 1 is rolled by the centrifugal force in a state where the residue 34 is taken in, and is shaken off from the periphery of the wafer W.
- the droplet 1 becomes smaller before being shaken off from the periphery of the wafer W, or as shown on the left side of the same drawing, it is separated from the larger droplet 1 and smaller droplet 1 May be generated.
- the droplet 1 may have a very small size when ejected from the nozzle 21. Even in such a case, when the droplet 1 reaches the surface of the wafer W, a vapor layer is formed between the droplet 1 and the wafer W. Therefore, for example, as shown in FIG.
- the nozzle 21 is moved from the center position of the wafer W to the peripheral side while supplying the cleaning liquid, and cleaning (removal of the residue 34) is performed over the entire surface of the wafer W. .
- the line 52 is formed in both the dense region 54 and the sparse region 55 as shown in FIG.
- the residue 34 is removed in a state in which the falling is suppressed.
- the rotation speed of the wafer W is too large, the buoyancy (centrifugal force) of the droplet 1 of the cleaning liquid is increased, and there is a possibility that the action of taking up the residue 34 cannot be sufficiently exhibited, but the rotation speed is too small. Then, since the droplet 1 supplied onto the wafer W disappears before being discharged from the wafer W due to centrifugal force, it is desirable to set the number of rotations so that the cleaning action by the droplet 1 is effectively exhibited. Specifically, for example, 200 rpm to 1000 rpm is preferable.
- this wafer W is cleaned to remove the surface of the low dielectric constant film 31 on which the pattern 53 including the convex line 52 and the residue 34 that has entered the groove 51 are removed.
- the wafer W is heated so that the Leidenfrost phenomenon occurs on the wafer W, and the cleaning liquid is supplied to the heated wafer W. Therefore, since the vapor of the droplet 1 is interposed between the cleaning liquid droplet 1 and the wafer W, the surface tension due to the contact between the droplet 1 and the wafer W does not work or the surface tension works. But it is extremely small.
- the residue 34 on the surface of the wafer W is rolled up by the vapor blown from the lower surface of the droplet 1 and taken into the droplet 1. Accordingly, since a lateral force is suppressed from being applied to the line 52 due to the surface tension of the droplet 1, the residue 34 is removed in a state where the fall of the line 52 is suppressed in both the dense region 54 and the sparse region 55. be able to. Therefore, even if the width dimension of the line 52 is extremely narrow as described above, or even if the low dielectric constant film 31 is porous and brittle, the line 52 can be prevented from falling.
- the product generated by the reaction between the low dielectric constant film 31 and the etching gas plasma may remain as a residue 34 on the surface of the wafer W.
- a residue 34 is also removed by the cleaning described above. Therefore, the wafer W may be cleaned before the ashing process, and the wafer W may be cleaned again after the ashing process.
- the present invention is applied to a process of performing an etching process without such an ashing process. A cleaning method may be applied.
- the aforementioned pattern 43 of the photoresist film 32 is formed by the exposure process and the development process, the surface of the wafer W (the upper surface of the line 42) and the inside of the groove 41 after the development process are formed As shown in FIG. 14B, the organic matter constituting the photoresist film 32 remains as a residue 34.
- the pattern 43 has the above-described pattern 53 such that the width dimension of the line 42 and the opening dimension of the groove 41 are about 32 nm, respectively, and the height dimension of the line 42 (depth dimension of the groove 41) is about 120 nm, for example. In some cases, it may be formed in a finer dimension. Further, since it is made of a soft organic material as described above, the line 42 is extremely weak and easily falls.
- the residue 34 is suppressed in both the dense region 44 and the sparse region 45 in the dense region 44 and the sparse region 45 as in the above example. Can be removed.
- the Leidenfrost phenomenon occurring in the photoresist film 32 and the state of the residue 34 being removed are the same as in the above-described example, and thus the description thereof is omitted.
- the heating temperature of the wafer W is organic.
- a temperature lower than the heating temperature (140 ° C. to 300 ° C.) in the above example may be set, for example, 60 ° C. to 100 ° C.
- cleaning is performed in a reduced pressure state, for example, about 10 kPa to 50 kPa, so that the cleaning liquid is in a boiling state at the above heating temperature (so that the boiling point is lowered). You may be made to be.
- FIG. 15 An example of a cleaning apparatus for cleaning the wafer W in such a reduced pressure state will be described with reference to FIG. 15, for example.
- This apparatus has substantially the same configuration as the cleaning apparatus shown in FIG. 4 described above, and the same parts as those in FIG.
- a pressure reducing means 70 such as a vacuum pump is connected to the exhaust pipe 20 via a pressure adjusting means 73 such as a butterfly valve.
- the lifting mechanism 69 and the rotating mechanism 12c described above are provided outside (downward) the processing container 11, for example.
- telescopic bellows 80 and 80 are provided between the elevating mechanism 69 and the bottom surface of the processing container 11 and between the rotating mechanism 12c and the bottom surface of the processing container 11, respectively. As a result, the atmosphere in the processing container 11 is kept airtight.
- an electrostatic chuck 74 for electrostatically attracting the wafer W to the upper surface of the mounting table 12. May be provided.
- the wafer W is attracted onto the mounting table 12 by applying a DC high voltage to the electrostatic chuck 74 from a power source (not shown).
- the method of supplying power to the electrostatic chuck 74 and the heater 13 is configured in the same manner as in FIG. 5 described above.
- a high voltage for supplying the shaft portion 65b of the power supply shaft 65 to the electrostatic chuck 74 is used.
- a configuration is adopted in which a double pipe forming a pair of power supply paths for the heater 13 is provided outside the voltage supply path.
- the above-described filter unit 27 is not provided in the processing container 11, and a clean gas such as nitrogen (N 2 ) gas or the like is introduced into the processing container 11 on the top wall of the processing container 11.
- a clean gas such as nitrogen (N 2 ) gas or the like is introduced into the processing container 11 on the top wall of the processing container 11.
- One end side of a gas supply pipe 28 for supply is connected, and the other end side of the gas supply pipe 28 is connected to a gas supply unit 75 in which the above gas is stored, for example, via a valve or a flow rate adjusting unit (not shown).
- a valve or a flow rate adjusting unit not shown
- the transfer port 11a of the processing container 11 is hermetically sealed by a gate valve (not shown), for example.
- the heating temperature of the wafer W and the pressure in the processing chamber 11 are set so that the Leidenfrost phenomenon occurs on the wafer W and the deterioration of the photoresist film 32 is suppressed as in the above example. Is adjusted, and the wafer W is cleaned to obtain the same effect.
- the pressure in the processing chamber 11 may be adjusted together with the heating temperature of the wafer W in this way.
- a heating lamp 90 that forms a heating means in the circumferential direction is provided below the mounting table 12. It is also possible to heat the wafer W from the back side by the heating lamp 90.
- the present invention forms a double-gate type Fully-Depleted SOI-MOSFET structure as shown in FIG. 18A, for example, in addition to the pattern in which long extending grooves and lines are formed as in the above examples.
- a columnar structure 110 such as a strip-shaped pillar for forming a channel on the upper surface and the side surface, a gate electrode disposed when forming a double gate structure called FIN-FET, or as shown in FIG. 18B, for example You may apply to the wafer W in which the pattern provided with the convex part which falls easily like the cylinder-type (cylindrical type) electrode 111 etc. which were formed in the upper layer side of the gate electrode was formed.
- the convex portion that easily falls is a dimension having a width dimension or a depth dimension of 50 nm or less and a height dimension of about 150 nm or more, that is, an aspect ratio (a height dimension with respect to a smaller dimension among the width dimension and the depth dimension of the projection).
- (Ratio) refers to a convex portion having a value greater than about 3.
- the film on which such a pattern is formed is, for example, a metal such as copper (Cu) or polycrystalline silicon (Si). May be.
- the cleaning liquid may be, for example, an organic solvent (ethanol, isopropyl alcohol (IPA), etc.).
- IPA isopropyl alcohol
- the Leidenfrost phenomenon occurs at a lower temperature, for example, about 100 ° C. (at normal pressure) than in the case of pure water, so that damage to the wafer W due to heat can be reduced.
- a low-temperature liquid liquid nitrogen, liquid argon, liquid oxygen, liquid krypton, liquid xenon, liquid carbon dioxide, etc.
- a low-temperature liquid liquid nitrogen, liquid argon, liquid oxygen, liquid krypton, liquid xenon, liquid carbon dioxide, etc.
- a temperature region where the vapor film is generated is defined as a “film boiling region”, and this temperature region is a region where the temperature difference between the boiling point of the liquid and the solid temperature is, for example, 100 ° C. or more.
- the boiling point of the low-temperature liquid is as low as about minus a few tens of degrees Celsius, for example, when these low-temperature liquids cooled in advance to be in a liquid state are dropped or sprayed onto the wafer W at room temperature, for example, Since these low-temperature liquids are instantly evaporated by heat and the Leidenfrost phenomenon occurs, the wafer W can be cleaned in the same manner as in the above examples. Therefore, when such a low-temperature liquid is used as a cleaning liquid, the wafer W is cleaned using the Leidenfrost phenomenon even at a room temperature. In this case, for example, in the cleaning device of FIG.
- the cleaning liquid (droplet 1) is not in contact with the surface of the wafer W (the upper surfaces of the patterns 43 and 53) due to the Leidenfrost phenomenon has been described. If no cleaning liquid remains in the patterns 43 and 53 after the cleaning, the lines 42 and 52 can be prevented from falling down as described above, and therefore the cleaning liquid may be brought into contact with the surface of the wafer W. .
- a cleaning liquid was supplied to the test wafer under conditions that caused the Leidenfrost phenomenon, and the test wafer was cleaned.
- the test wafer was produced by uniformly and uniformly adhering particles having an average particle diameter of 0.37 ⁇ m to a wafer whose particle material is SiO 2 .
- Pure water as a cleaning liquid was supplied to a test wafer heated to 225 ° C.
- the processing time was 5 minutes, and pure water was supplied to the test wafer for 5 minutes. Pure water was supplied to the test wafer as droplets of about ⁇ 1 to 2 mm. During processing, the pure water droplets supplied on the test wafer were rolling on the test wafer.
- FIG. 19 shows the number of particles measured for each particle diameter.
- FIG. 20 shows the positions of the confirmed particles in a 20 mm ⁇ 20 mm region randomly selected from the test wafer.
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Abstract
Description
表面にパターンが形成された半導体装置用の基板を、処理容器内の載置台に載置する工程と、
前記基板を加熱する工程と、
次いで、前記基板の表面に液体の洗浄液を供給する工程と、を含み、
前記洗浄液を供給する工程においてライデンフロスト現象が起こって前記基板に供給される洗浄液の液滴と前記基板との間に前記洗浄液の蒸気が介在するように、前記基板を加熱する工程において前記基板が加熱される。
表面にパターンが形成された半導体装置用の基板を、処理容器内の載置台に載置する工程と、
次いで、前記基板の表面に洗浄液を供給する工程と、を含み、
前記洗浄液を供給する工程において、ライデンフロスト現象が起こって前記基板に供給される洗浄液の液滴と前記基板との間に前記洗浄液の蒸気が介在するように、前記載置台上に載置された前記基板の温度よりも低い沸点の液体が前記洗浄液として供給される
表面にパターンが形成された半導体装置用の基板が載置されるように構成された載置台を内部に有する処理容器と、
前記基板を洗浄するための液体の洗浄液を前記載置台上の基板に対して供給する洗浄液供給部材と、
ライデンフロスト現象が起こって前記基板に供給される洗浄液の液滴と前記載置台上の前記基板との間に前記洗浄液の蒸気が介在するように、前記載置台上の前記基板を加熱する加熱機構と、を備える。
表面にパターンが形成された半導体装置用の基板が載置されるように構成された載置台を内部に有する処理容器と、
前記基板を洗浄するための洗浄液を前記載置台上の基板に対して供給する洗浄液供給部材と、を備え、
洗浄液供給部材は、ライデンフロスト現象が起こって前記基板に供給される洗浄液の液滴と前記基板との間に前記洗浄液の蒸気が介在するよう、前記載置台上に載置された前記基板の温度よりも低い沸点の液体を前記洗浄液として供給するように構成されている。
洗浄装置を制御する制御装置によって実行されるプログラムが記録された記憶媒体であって、
前記プログラムが前記制御装置によって実行されることにより、上述した本発明の一態様による基板の洗浄方法のいずれか一つを、洗浄装置に実施させる。
洗浄装置を制御する制御装置によって実行されるプログラムが記録された記憶媒体であって、
前記プログラムが前記制御装置によって実行されることにより、上述した本発明の他の態様による基板の洗浄方法のいずれか一つを、洗浄装置に実施させる。
本発明の一実施の形態について以下に説明する。以下に説明する洗浄処理は、半導体装置製造用の基板である例えば半導体ウェハ(以下、「ウェハ」という)Wに対して例えばミスト状の洗浄液例えば純水を供給し、純水の表面張力がウェハWに影響を及ぼさないように、あるいは、影響を及ぼしたとしても極めて小さな影響となるよう、ウェハW上においてライデンフロスト現象を生じさせながらウェハWを洗浄する処理である。このライデンフロスト現象とは、例えば熱したフライパンに水滴を落とした時などに起こる現象であり、図1Aに示すように、ウェハWが洗浄液の沸点よりも高い温度に加熱されている場合に、ウェハW上に供給された洗浄液の液滴1が当該ウェハWに急激に加熱されることによって、ウェハWの表面と液滴1との間に当該液滴1の蒸気が介在する現象である。この蒸気は、液滴1の下面からウェハWの表面に向かって勢いよく供給され、ウェハWの熱により更に加熱されて軽くなって上昇し、再度液滴1に取り込まれるか、あるいは液滴1の周囲から上側に向かって拡散していくことになる。ここで、洗浄液例えば純水について、この実施の形態で用いる用語について説明すると、水蒸気とは気体であり、液滴1とは、例えば後に言及する図8A~図8Cに示すように、洗浄液がパターン53上に乗っている状態であり、また、ミストとは上記の液滴1が多量に散布されている状態を言う。従って、本発明においてライデンフロスト現象を利用してウェハWの洗浄を行うためには、洗浄液はウェハW上において上記の液滴1やミストとなっていることになる。
次に、上記のようにライデンフロスト現象を利用してウェハWの洗浄を行うための洗浄装置の一例について、図4及び図5を参照して簡単に説明する。この洗浄装置は、筐体である処理容器11と、この処理容器11内に配設された載置台12と、を備えている。この載置台12は、内部が空洞の回転軸12bを介して例えば伝達機構をなすベルト12a及びモータMを含む回転機構12cにより鉛直軸回りに回転自在に構成されている。この載置台12の内部には、ウェハWを加熱するための加熱機構であるヒーター13が埋設されている。
次に、本実施の形態による洗浄方法において洗浄対象となるウェハWについて、図6A~図6Cを参照して説明する。このウェハWは、図6Aに示すように、層間絶縁膜である例えばシリコン化合物(SiO2やSiCOH)などからなる低誘電率膜31と、複数の溝41とこの溝41、41間に長く伸びる凸部として形成されたライン42とからなるパターン43が形成されたフォトレジスト膜32と、が下側からこの順番で下層側のシリコン層33上に積層された構造となっている。また、このウェハWには、上記の溝41の開口幅が狭く形成されてライン42が密に配置された密領域44と、溝41の開口幅が広く形成されてライン42が大きく離間して疎に配置された疎領域45と、が設けられている。尚、この図6Aにおいては、このパターン43の寸法を模式的に示している。以下の図6B、図6C、図8A~図11、図13~図14Bについても同様である。
そこで、以下のようにしてウェハW上の残渣34を除去(洗浄)する。先ず、既述の洗浄装置において、図示しない外部の搬送手段によりウェハWを処理容器11内に搬入し、昇降機構69とこの搬送手段との協働作用により載置台12上にウェハWを載置するとともに、吸引路60の吸引により載置台12上にウェハWを吸着保持する。そして、ウェハWの表面においてライデンフロスト現象が起こるように当該ウェハWを所定の温度例えば140℃~300℃好ましくは160℃~200℃に加熱して、図7に示すようにウェハWを回転させると共に、ノズル21から例えばウェハWの中央にミスト状の洗浄液を供給する。
上記の例では、低誘電率膜31をパターニングしてなるパターン53上の残渣34を除去する場合について説明したが、このようなパターン53以外の、洗浄液の表面張力により倒れやすいパターン、つまり幅寸法の小さい凸部が形成されたを備えたウェハWを、洗浄することもできる。このようなパターンを構成する他の例としては、例えば図14Aに示すように、既述のフォトレジスト膜32が挙げられる。
Claims (16)
- 表面にパターンが形成された半導体装置用の基板を、処理容器内の載置台に載置する工程と、
前記基板を加熱する工程と、
次いで、前記基板の表面に液体の洗浄液を供給する工程と、を含み、
前記洗浄液を供給する工程においてライデンフロスト現象が起こって前記基板に供給される洗浄液の液滴と前記基板との間に前記洗浄液の蒸気が介在するように、前記基板を加熱する工程において前記基板が加熱される、基板の洗浄方法。 - 前記洗浄液は、ミスト状で前記基板に供給される、請求項1に記載の基板の洗浄方法。
- 前記基板を加熱する工程において、前記基板が140℃~300℃に加熱され、
前記洗浄液を供給する工程において、大気雰囲気下で、水が前記洗浄液として供給される、請求項1に記載の基板の洗浄方法。 - 前記基板に洗浄液を供給する工程の前に、前記処理容器内を減圧する工程を更に備える、請求項1に記載の基板の洗浄方法。
- 前記洗浄液は、水または有機溶媒の少なくともいずれか一方である、請求項1に記載の基板の洗浄方法。
- 表面にパターンが形成された半導体装置用の基板を、処理容器内の載置台に載置する工程と、
次いで、前記基板の表面に洗浄液を供給する工程と、を含み、
前記洗浄液を供給する工程において、ライデンフロスト現象が起こって前記基板に供給される洗浄液の液滴と前記基板との間に前記洗浄液の蒸気が介在するように、前記載置台上に載置された前記基板の温度よりも低い沸点の液体が前記洗浄液として供給される、基板の洗浄方法。 - 前記洗浄液は、液体窒素、液体アルゴン、液体酸素、液体クリプトン、液体キセノンおよび液体二酸化炭素からなる群から選択される一以上である、請求項6に記載の洗浄方法。
- 前記洗浄液は、ミスト状で前記基板に供給される、請求項6に記載の基板の洗浄方法。
- 前記基板に洗浄液を供給する工程の前に、前記処理容器内を減圧する工程を更に備える、請求項6に記載の基板の洗浄方法。
- 表面にパターンが形成された半導体装置用の基板が載置されるように構成された載置台を内部に有する処理容器と、
前記基板を洗浄するための液体の洗浄液を前記載置台上の基板に対して供給する洗浄液供給部材と、
ライデンフロスト現象が起こって前記基板に供給される洗浄液の液滴と前記載置台上の前記基板との間に前記洗浄液の蒸気が介在するように、前記載置台上の前記基板を加熱する加熱機構と、を備える、基板の洗浄装置。 - 前記洗浄液供給部材は、洗浄液をミスト状に供給するように構成されている、請求項10に記載の基板の洗浄装置。
- 表面にパターンが形成された半導体装置用の基板が載置されるように構成された載置台を内部に有する処理容器と、
前記基板を洗浄するための洗浄液を前記載置台上の基板に対して供給する洗浄液供給部材と、を備え、
洗浄液供給部材は、ライデンフロスト現象が起こって前記基板に供給される洗浄液の液滴と前記基板との間に前記洗浄液の蒸気が介在するよう、前記載置台上に載置された前記基板の温度よりも低い沸点の液体を前記洗浄液として供給するように構成されている、基板の洗浄装置。 - 前記洗浄液は、液体窒素、液体アルゴン、液体酸素、液体クリプトン、液体キセノンおよび液体二酸化炭素からなる群から選択される一以上である、請求項12に記載の洗浄装置。
- 前記洗浄液供給部材は、洗浄液をミスト状に供給するように構成されている、請求項12に記載の基板の洗浄装置。
- 洗浄装置を制御する制御装置によって実行されるプログラムが記録された記憶媒体であって、
前記プログラムが前記制御装置によって実行されることにより、請求項1に記載された洗浄方法を、洗浄装置に実施させる、記憶媒体。 - 洗浄装置を制御する制御装置によって実行されるプログラムが記録された記憶媒体であって、
前記プログラムが前記制御装置によって実行されることにより、請求項6に記載された洗浄方法を、洗浄装置に実施させる、記憶媒体。
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CN102881617B (zh) * | 2011-07-13 | 2015-04-22 | 斯克林集团公司 | 基板处理方法及基板处理装置 |
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CN102099900B (zh) | 2013-06-05 |
JP5413016B2 (ja) | 2014-02-12 |
KR20110028532A (ko) | 2011-03-18 |
US8673086B2 (en) | 2014-03-18 |
US20110155177A1 (en) | 2011-06-30 |
CN102099900A (zh) | 2011-06-15 |
KR101133819B1 (ko) | 2012-04-06 |
JP2010056534A (ja) | 2010-03-11 |
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