FILM FORMING APPARATUS AND METHOD OF CONTROLLING FILM FORMING APPARATUS

There is a film forming apparatus comprising: a first holder holding a first target formed of a first material; a second holder holding a second target formed of a second material different from the first material; and a mounting table holding a substrate, the mounting table rotatable with a central axis of the mounting table as a rotation axis, wherein a distance from the central axis of the mounting table to a center of a sputter surface of the first target is different from a distance from the central axis of the mounting table to a center of a sputter surface of the second target.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Japanese Patent Application No. 2022-114359, filed on Jul. 15, 2022, the entire contents of which are incorporated herein by reference.

TECHNICAL FIELD

The present disclosure relates to a film forming apparatus and a method of controlling the film forming apparatus.

BACKGROUND

Japanese Laid-open Patent Publication No. 2022-29532 discloses a sputtering apparatus having a plurality of targets.

SUMMARY

In one aspect, the present disclosure provides a film forming apparatus that simultaneously sputters targets of different materials to improve in-plane uniformity of film thickness and composition, and a method of controlling the film forming apparatus.

In accordance with an aspect of the present disclosure, there is a film forming apparatus comprising: a first holder holding a first target formed of a first material; a second holder holding a second target formed of a second material different from the first material; and a mounting table holding a substrate, the mounting table rotatable with a central axis of the mounting table as a rotation axis, wherein a distance from the central axis of the mounting table to a center of a sputter surface of the first target is different from a distance from the central axis of the mounting table to a center of a sputter surface of the second target.

DETAILED DESCRIPTION

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In each drawing, the same components are denoted by the same reference numerals, and redundant description may be omitted.

A film forming apparatus (a substrate processing apparatus, a sputtering apparatus)100will be described with reference toFIG.1.FIG.1is an example of a schematic cross-sectional view of the film forming apparatus100. The film forming apparatus100is a PVD (Physical Vapor Deposition) apparatus, and is a sputtering apparatus for forming a film by adhering (depositing) sputter particles (film forming atoms) emitted from targets T1and T2onto a surface of a substrate W such as a semiconductor wafer mounted on a mounting table12in a processing chamber110. In addition, the film forming apparatus100is a sputtering apparatus that forms a compound film onto the substrate W by using a co-sputtering (simultaneous sputtering) technique of simultaneously sputtering the targets T1and T2of different materials.

The film forming apparatus100includes a processing chamber110having an internal space110afor performing film formation processing onto the substrate W. In addition, the film forming apparatus100has a configuration for performing film formation processing onto the substrate W within the processing chamber110, and includes a stage mechanism portion120, a target holding portion130, a target covering portion140, a gas supply portion150, a gas discharge portion160, and a magnet mechanism portion170. Further, the film forming apparatus100has a controller180that controls an operation of each component.

The processing chamber110included in the film forming apparatus100is made of, for example, aluminum. The processing chamber110is connected to ground potential. In other words, the processing chamber110is grounded. The processing chamber110includes a loading/unloading port111that communicates the internal space110awith an outside of the processing chamber110, and a gate valve112that opens and closes the loading/unloading port111. When the gate valve112is opened, the film forming apparatus100loads and unloads the substrate W through the loading/unloading port111by a transport device (not shown). In addition, the processing chamber110has a pyramid portion113having a substantially pyramid shape (for example, a substantially quadrangular pyramid shape, a conical shape, or the like) on a ceiling portion located above the stage mechanism portion120.

In addition, the film forming apparatus100has a target central axis Ax1and a mounting table central axis Ax1.

The target central axis Ax1is an axis that is rotationally symmetrical between the targets T1and T2. In other words, the target central axis Ax1is an axis in which the distance from the target T1to the target central axis Ax1is the same as the distance from the target T2to the target central axis Ax1. In addition, the target central axis Ax1passes through the center (apex) of the pyramid portion113.

The mounting table central axis Ax2is an axis that passes through the center of the substrate W mounted on the stage mechanism portion120and extends along a vertical direction. Further, the mounting table central axis Ax2is a rotation axis when the substrate W rotates.

The stage mechanism portion120includes a mounting table121disposed within the processing chamber110, and a support driving portion122that operably supports the mounting table121. The mounting table121includes a substantially disk-shaped base portion121aand an electrostatic chuck121bfixed on the base portion121a.

The base portion121ais made of, for example, aluminum. The base portion121ais fixed to an upper end of the support driving portion122. By moving the base portion121aby the support driving portion122, the electrostatic chuck121bis disposed at a predetermined height position of the internal space110a. In addition, the stage mechanism portion120may include a temperature control mechanism (not shown) that adjusts a temperature of the base portion121ato control a temperature of the substrate W mounted on the mounting table121.

The electrostatic chuck121bincludes a dielectric film and an electrode provided in an inner layer of the dielectric film (both not shown). A DC power supply123is connected to the electrode of the electrostatic chuck121b. The electrostatic chuck121belectrostatic-suctions the substrate W mounted on an upper surface of the electrostatic chuck121bby generating an electrostatic force in the dielectric film by a DC voltage supplied to the electrode from the DC power supply123. The center of the upper surface of the electrostatic chuck121b(the mounting surface of the substrate W) coincides with the mounting table central axis Ax2.

The support driving portion122has a columnar support shaft124that holds the base portion121a, and an operating device125that operates the support shaft124. The support shaft124extends in a vertical direction and extends from the inner space110aof the processing chamber110to an outside of the processing chamber110through a bottom portion114. The shaft center of the support shaft124overlaps with the mounting table central axis Ax2.

The operating device125is provided outside the processing chamber110. The operating device125holds a lower end side of the support shaft124. The operating device125rotates the support shaft124around the mounting table central axis Ax2based on the control of the controller180. In addition, the operating device125vertically moves up and down (up and down movement) a mounting table121. The mounting table121rotates and moves up and down within the processing chamber110by the operation of the operating device125.

In addition, the stage mechanism portion120includes a sealing structure126that seals the gap between the bottom portion114of the processing chamber110and the support shaft124while making the support shaft124operable. For example, a magnetic fluid seal may be applied as the sealing structure126.

The target holding portion130of the film forming apparatus100holds a plurality of targets T1and T2, which are cathode targets, at positions spaced upward from the mounting table121. The film forming apparatus100shown inFIG.1includes two target holding portions130. One target holding portion130includes a metal holder (first holder)131that holds the target (first target) T1, and an insulating member132that fixes an outer peripheral portion of the holder131and supports the holder131. Similarly, the other target holding portion130includes a metal holder (second holder)131that holds the target (second target) T2, and the insulating member132that fixes an outer peripheral portion of the holder131and supports the holder131.

The targets T1and T2, respectively held by the holder131, are formed of a material having a substance for film formation. Each of the targets T1and T2is a rectangular flat plate.

The target T1is formed of a first material. The target T2is formed of a second material different from the first material. In the following description, the description is made assuming that the target T1is formed of a material containing silicon (Si), the target T2is formed of a material containing tungsten (W), and the film forming apparatus100forms a tungsten silicide (WSi) film on the substrate W. The tungsten silicide (WSi) film may, for example, be used as a hard mask.

Each of the holders131is formed in a rectangular shape that is one size larger than the targets T1and T2in a plan view. Each of the holders131is fixed to an inclined surface of the pyramid portion113through the insulating member132. Since each of the holders131is fixed to the inclined surface of the pyramid portion113, each of the holders131holds the surfaces of the targets T1and T2(sputter surfaces exposed in the internal space110a) in an inclined state with respect to the target central axis Ax1.

In addition, one target holding portion130has a power supply (first power supply)133that applies a negative DC voltage to the holder131that holds the target T1. Similarly, the other target holder130has a power supply (second power supply)133that applies a negative DC voltage to the holder131that holds the target T2. In addition, the power supply133may be a single power supply that selectively applies a voltage to each of the targets T1and T2.

FIG.2is an example of a schematic plane view showing the arrangement of two holders131and two magnets171of the film forming apparatus100. As shown inFIG.2, the target holding portion130evenly disposes a plurality of the holders131(and the targets T1and T2) along a virtual circle ic centered on the target central axis Ax1. In other words, each of the two holders131(and the targets T1and T2) is disposed on the virtual circle ic at intervals of an angle of 180 degrees. In addition, each of the two holders131(and the targets T1and T2) is provided such that a long side of the holder131extends parallel to a tangent line of the virtual circle ic. Each of the two targets T1and T2is held at the same position as the holder131so as to face obliquely downward (see alsoFIG.3).

Referring toFIG.1, the target covering portion140of the film forming apparatus100has a shutter main body141disposed within the processing chamber110and a shutter driving portion142supporting the shutter main body141in an operable manner.

The shutter main body141is provided between the targets T1and T2and the mounting table121. The shutter main body141is formed in a pyramid shape substantially parallel to an inclined surface of the pyramid portion113of the processing chamber110. The shutter main body141may face sputter surfaces of the targets T1and T2. The shutter main body141also has two openings141athat are slightly larger than the targets T1and T2. The shutter main body141has the two openings141aevenly disposed along a virtual circle ic centered on the target central axis Ax1. In other words, each of the two openings141ais disposed on the virtual circle ic at intervals of an angle of 180 degrees. In addition, each of the two openings141ais provided such that a long side of the opening141aextends parallel to a tangent line of the virtual circle ic.

The shutter driving portion142includes a columnar rotary shaft143and a rotating portion144that rotates the rotary shaft143. The axis of the rotary shaft143overlaps with the target central axis Ax1of the processing chamber110. The rotary shaft143extends along a vertical direction and fixes the center (apex) of the shutter main body141at its lower end. The rotary shaft143protrudes outside the processing chamber110through the center of the pyramid portion113.

The rotating portion144is provided outside the processing chamber110, and rotates the rotary shaft143relative to an upper end (connector155a) holding the rotary shaft143through a rotation transmission portion (not shown). As a result, the rotary shaft143and the shutter main body141rotate around the target central axis Ax1.

When sputtering is performed, the target covering portion140adjusts a circumferential position of the openings141abased on the control of the controller180, so that one opening141afaces the target T1and the other opening141afaces the target T2. This exposes a sputter surface of the target T1and a sputter surface of the target T2. In addition, the target covering portion140adjusts a circumferential position of the opening141abased on the control of the controller180, and rotates the same by 90° from the aforementioned position, thereby covering the sputter surface of the target T1and the sputter surface of the target T2.

The gas supply portion150of the film forming apparatus100includes an excitation gas portion151that is provided in the pyramid portion113and supplies an excitation gas.

The excitation gas portion151includes a pipe152for circulating gas outside the processing chamber110. The excitation gas portion151also includes a gas source153, a flow controller154, and a gas introduction portion155in order from an upstream side to a downstream side of the pipe152.

The gas source153stores an excitation gas (for example, argon gas). The gas source153supplies gas to the pipe152. A mass flow controller or the like is applied to the flow controller154, for example, and adjusts a flow rate of the gas supplied into the processing chamber110. The gas introduction portion155introduces gas from the outside of the processing chamber110into the inside. The gas introduction portion155is configured of a connector155aconnected to the pipe152outside the processing chamber110, and a gas passage143aformed in the rotary shaft143of the target covering portion140.

The gas discharge portion160provided in the film forming apparatus100includes a decompression pump161, and an adapter162for fixing the decompression pump161to the bottom portion114of the processing chamber110. The gas discharge portion160decompresses the internal space110aof the processing chamber110under the control of the controller180.

The magnet mechanism portion170provided in the film forming apparatus100applies a magnetic field to each of the targets T1and T2. The magnet mechanism portion170applies a magnetic field to each of the targets T1and T2, so that the magnet mechanism portion170induces plasma to the targets T1and T2. The magnet mechanism portion170includes a magnet171(cathode magnet) and an operation portion172that operably holds the magnet171for each of the plurality of holders131. In other words, one magnet mechanism portion170includes a magnet (a first magnet)171disposed on a back surface of the holder131that holds the target T1, and an operation portion (a first operation portion)172that operably holds the magnet171. Similarly, the other magnet mechanism portion170includes a magnet (a second magnet)171disposed on a back surface of the holder131that holds the target T2, and an operation portion (a second operation portion)172that operably holds the magnet171.

The two magnets171are disposed so as to overlap with the targets T1and T2on the virtual circle ic.

Each of the magnets171is formed in the same shape. Further, each of the magnets171generates magnetic force of the same degree as each other. Specifically, each of the magnets171has a substantially rectangular shape in a plan view. In the holding state of the operation portion172, a long side of the magnet171extends parallel to a lateral direction of the rectangular targets T1and T2, while a short side of the magnet171extends parallel to a longitudinal direction of the rectangular targets T1and T2.

Each of the magnets171may apply a permanent magnet. The material forming each of the magnets171is not particularly limited as long as it has an appropriate magnetic force, and examples thereof include iron, cobalt, nickel, samarium, and neodymium.

The operation portion172holding each of the magnets171reciprocates/oscillates the held magnets171along a longitudinal direction of the targets T1and T2. In other words, the magnet171is provided movably. Further, the operation portion172holding each of the magnets171separates and brings together the held magnets171from the targets T1and T2. Specifically, each of the operation portions172includes a reciprocating mechanism174that holds the magnet171and reciprocates the magnet171, and a contact and separation mechanism175that holds the reciprocating mechanism174and moves the reciprocating mechanism174away from and close to the targets T1and T2.

The controller180is composed of a computer and controls each component of the film forming apparatus100. The controller180has a main controller composed of a CPU that actually performs these controls, an input device, an output device, a display device, and a storage device. The storage device stores parameters of various processes executed in the film forming apparatus100, and a storage medium in which a program, i.e., a processing recipe, for controlling the processes executed by the film forming apparatus100is stored is set. The main controller of the controller180calls a predetermined processing recipe stored in the storage medium, and causes the film forming apparatus100to execute a predetermined process based on the processing recipe.

Next, an example of film formation processing using the film formation apparatus100will be described. In addition, the inside of the processing chamber110is vacuum exhausted to a predetermined vacuum level by the gas discharge portion160.

First, the controller180prepares the substrate W on the mounting table121. Specifically, the controller180opens the gate valve112. The substrate W is loaded into the processing chamber110through the loading/unloading port111by a transport device (not shown) and mounted on the mounting table121. The controller180controls a power supply (not shown) of the electrostatic chuck121bto electrostatic-suction the substrate W to the mounting table121. When the transport device retreats from the loading/unloading port111, the controller180closes the gate valve112. Further, the controller180controls the support driving portion122to raise the mounting table121to a predetermined height position.

Next, the controller180performs film formation processing on the substrate W. Specifically, the controller180controls the support driving portion122to rotate the mounting table121holding the substrate W thereon. The controller180also controls the flow controller154to supply an excitation gas (for example, argon gas) into the processing chamber110. Further, the controller180controls the power supply133to apply a negative DC voltage to the holder131holding the targets T1and T2. As a result, ions in the excitation gas dissociated around the targets T1and T2collide with the targets T1and T2, and sputter particles are emitted from the targets T1and T2into the internal space110a. As a result, sputter particles adhere (deposit) to the substrate W, and a film is formed on the substrate W.

Further, during the film formation processing, the controller180controls the operation portion172to oscillate (reciprocate) the magnet171. Thereby, plasma is induced by the magnetic field of the magnet171. In other words, by controlling the oscillation width of the magnet171, the sputter electrical discharge regions of the targets T1and T2are controlled.

When the film formation processing is completed, the controller180controls the flow controller154to stop supplying an excitation gas. In addition, the controller180controls the power supply133to stop applying voltage to the holder131. Further, the controller180controls the support driving portion122to stop the rotation of the mounting table121. Next, the controller180controls the support driving portion122to lower the mounting table121to a predetermined position. Further, the controller180controls the power supply (not shown) of the electrostatic chuck121bto release electrostatic adsorption. The controller180opens the gate valve112. The substrate W is unloaded from the processing chamber110through the loading/unloading port111by the transport device (not shown). When the transport device retreats from the loading/unloading port111, the controller180closes the gate valve112.

As described above, the film forming apparatus100emits sputter particles from the targets T1and T2, adheres the sputter particles to the surface of the substrate W, and forms a film.

Next, the disposition of the targets T1and T2and the mounting table121will be further explained with reference toFIG.3.FIG.3is an example of a schematic cross-sectional view for explaining the disposition of the targets T1and T2and the mounting table121.

Herein, a central axis Ax11is an axis passing through the center of a sputter surface of the target T1and perpendicular to the sputter surface of the target T1. A central axis Ax12is an axis passing through the center of a sputter surface of the target T2and perpendicular to the sputter surface of the target T2. In addition, a distance (horizontal distance) from the center of the sputter surface of the target T1to the central axis Ax2of the mounting table is defined as a distance L1. A distance (horizontal distance) from the center of the sputter surface of the target T2to the central axis Ax2of the mounting table is defined as a distance L2.

In addition, an oscillation width of the magnet171corresponding to the target T1is defined as an oscillation width S1. An oscillation width of the magnet171corresponding to the target T2is defined as an oscillation width S2. In addition, as described above inFIG.2, the moving direction of the magnet171is a longitudinal direction of the targets T1and T2(a direction perpendicular to the ground inFIG.1and a vertical direction of the ground inFIG.2). However, inFIG.3, the target T1, the holder131, and the magnet171are rotated by 90° around the central axis Ax11to schematically illustrate the oscillation width S1. In addition, the target T2, the holder131, and the magnet171are rotated by 90° around the central axis Ax12to schematically illustrate the oscillation width S2.

Further, an angle distribution D1in which silicon (Si) is sputtered and emitted from the target T1is shown. An angle distribution D2in which tungsten (W) is sputtered and emitted from the target T2is shown.

Herein, as shown inFIG.2, the magnet171has an N pole disposed on the inside and an S pole disposed on the outside. By magnetic fields formed based on the disposition of the magnet171, the emission angle distribution of sputter particles forms an angle distribution having two ridges as shown inFIG.3.

In addition, as shown inFIG.3, the emission angle distribution of sputter particles differs depending on a target material. Herein, the emission angle distribution of the sputter particles is defined as an opening angle of peaks of two ridges in the angle distribution having the two ridges of the sputter particles emitted from the targets T1and T2. In other words, the closer the peaks of the two ridges are to the normal line direction of a sputter surface, the smaller the opening angle of the peaks of the two ridges and the smaller the emission angle distribution of the sputter particles. In the example shown inFIG.3, the emission angle distribution of the target T1made of silicon (Si) is larger than the emission angle distribution of the target T2made of tungsten (W) (Radiation angle distribution of sputter particles of target T1>Radiation angle distribution of sputter particles of target T2). Further, the emission angle distribution (opening angle) is defined by the material of a target.

The angle distribution D1of silicon (Si) has a high frequency in a direction inclined with respect to the normal line direction (central axis Ax11) of the sputter surface of the target T1. In other words, silicon (Si) is emitted in a direction inclined from the normal line direction of the sputter surface of the target T1.

On the other hand, the angle distribution D2of tungsten (W) has a high frequency in the normal line direction (central axis Ax12) of the sputter surface of the target T2. In other words, tungsten (W) is emitted in the normal line direction to the sputter surface of the target T2.

Accordingly, in the configuration of the film forming apparatus in which the target central axis Ax1(seeFIG.1) and the mounting table central axis Ax2(seeFIGS.1and2) are disposed in the same linear shape, the film of a compound deposited on the substrate W is biased depending on the material of a target, and it is difficult to achieve both in-plane uniformity of a film thickness and in-plane uniformity of a composition.

On the other hand, in the film forming apparatus100of the present embodiment, as shown inFIG.1, the target central axis Ax1and the mounting table central axis Ax2are disposed so as not to coincide with each other, that is, not to form the same linear shape. In other words, the mounting table central axis Ax2is horizontally offset with respect to the target central axis Ax1.

Specifically, when the emission angle distribution of the sputter particles of the target T1is larger than the emission angle distribution of the sputter particles of the target T2, a distance L1is disposed to be smaller (shorter) than the distance L2as shown inFIG.3(L1<L2).

Further, when the emission angle distribution of the sputter particles of the target T1is larger than the emission angle distribution of the sputter particles of the target T2, as shown inFIGS.2and3, the controller180controls each operation portion172such that the oscillation width S1of the magnet171corresponding to the target T1becomes smaller than the oscillation width S2of the magnet171corresponding to the target T2(S1<S2). In other words, when the emission angle distribution of the target T1is smaller than the emission angle distribution of the target T2, the sputter electrical discharge region of the target T1is controlled to be smaller than the sputter electrical discharge region of the target T2.

Herein, when the horizontal distance from the center of the sputter surface of the target to the mounting table central axis Ax1is shortened, the optimal distance of a distance TS in a height direction between the center of the substrate W and the center of the sputter surface of the target is shortened. Accordingly, in the target T1made of a material having a wide emission angle distribution of sputter particles, while maintaining the distance TS in the height direction between the center of the substrate W and the center of the sputter surface of the target, when the horizontal distance L1from the center of the sputter surface of the target to the mounting table central axis Ax2is shortened, the properties of the film formed on the substrate W (film thickness, in-plane uniformity of composition) are close to the properties of the film formed on the substrate W (film thickness, in-plane uniformity of composition) by a material having a narrow emission angle distribution of sputter particles. In addition, in the target T2made of a material having a narrow emission angle distribution of sputter particles, while maintaining the distance TS in the height direction between the center of the substrate W and the center of the sputter surface of the target, when the horizontal distance L2from the center of the sputter surface of the target to the mounting table central axis Ax2is lengthened, the properties of the film formed on the substrate W (film thickness, in-plane uniformity of composition) are close to the properties of the film formed on the substrate W (film thickness, in-plane uniformity of composition) by a material having a wide emission angle distribution of sputter particles.

Accordingly, by disposing the targets T1and T2and the mounting table121so that the distance L1is smaller (shorter) than the distance L2, the film thickness and in-plane uniformity of composition can be improved in a film forming apparatus that simultaneously sputters the targets T1and T2of different materials.

Further, the oscillation widths S1and S2of the magnet171are controlled so as to narrow the sputter electrical discharge region of the target T1having a wide emission angle distribution of sputter particles and widen the sputter electrical discharge region of the target T2having a narrow emission angle distribution of sputter particles. As a result, the film thickness and in-plane uniformity of composition can be improved in a film forming apparatus that simultaneously sputters the targets T1and T2of different materials.

Further, although it has been described that in the film forming apparatus100of the present embodiment, when the emission angle distribution of the target T1is larger than the emission angle distribution of the target T2, the distance L1is smaller (shorter) than the distance L2, and the oscillation width S1is smaller than the oscillation width S2, it is not limited thereto, and only either one may be used. In other words, when the emission angle distribution of the target T1is larger than the emission angle distribution of the target T2, the distance L1may be smaller (shorter) than the distance L2. Further, when the emission angle distribution of the target T1is larger than the emission angle distribution of the target T2, the oscillation width S1may be smaller than the oscillation width S2.

In addition, the film forming apparatus100may include a movement mechanism (not shown) that horizontally moves the mounting table121(stage mechanism portion120) so that the mounting table central axis Ax2may be moved with respect to the target central axis Ax1. Further, the film forming apparatus100may include a movement mechanism (not shown) that moves the target holding portion130and the magnet mechanism portion170with respect to the mounting table central axis Ax2. For example, a movement mechanism that moves the target holding portion130and the magnet mechanism portion170in a direction perpendicular to the oscillation direction of the magnet171(the tangent line direction of the virtual circle ic) may be provided.

In addition, although it has been described that the target T1is made of a silicon (Si) material and the target T2is made of a tungsten (W) material, they are not limited thereto. The targets T1and T2may be made of other materials.

In addition, although the film forming apparatus100has been described as having two target holding portions130as an example, it is not limited thereto and may be provided with three or more.

Next, an example of film formation by the film formation apparatus100will be described with reference toFIG.4.FIG.4is a graph showing an example of film formation results. Herein, the distance (TS) in a height direction between the center of the substrate W and the center of the sputter surfaces of the targets T1and T2is 200 mm, and the targets T1and T2are simultaneously sputtered to form a tungsten silicide film on the substrate W. The horizontal axis indicates the oscillation width S1of the magnet171of the target T1. A black square indicates the non-uniformity of a silicon film thickness (Si NU). A white square indicates the non-uniformity of the concentration (composition ratio) of tungsten of a tungsten silicide film (W Conc). A black circle indicates the film thickness of a tungsten film (W thk). A white circle indicates the film thickness of a tungsten silicide film (WSi thk).

As shown in the silicon film thickness (Si NU) indicated by black squares, the in-plane uniformity of the silicon film thickness improves as the oscillation width S1of the magnet171corresponding to the target T1decreases.

Further, as shown in the concentration (composition ratio) (W Conc) of tungsten in the tungsten silicide film indicated by white squares, the in-plane uniformity of the composition improves as the oscillation width S1of the magnet171corresponding to the target T1decreases.

In addition, the film thickness (W thk) of the tungsten film indicated by black circles does not change with the oscillation width S1of the magnet171corresponding to the target T1.

In addition, as shown in the film thickness (WSi thk) of the tungsten silicide film indicated by white circles, the non-uniformity is degraded as the oscillation width S1of the magnet171corresponding to the target T1decreases. In other words, the in-plane uniformity of the film thickness of the tungsten silicide film is improved.

It should be noted that other elements may be combined with the configurations in the above embodiments, and the present disclosure is not limited to the configurations shown herein. In this respect, it is possible to make changes within the range without departing from the gist of the present disclosure. It is also possible to determine appropriately according to the application form.