Patent Publication Number: US-2021175079-A1

Title: Plating method, plating apparatus and recording medium

Description:
TECHNICAL FIELD 
     The various aspects and embodiments described herein pertain generally to a plating method, a plating apparatus and a recording medium. 
     BACKGROUND 
     Recently, as miniaturization and three-dimensionalization of semiconductor devices progress, it is required to improve processing accuracy of etching when processing the semiconductor devices. As one way to improve the processing accuracy of the etching, it is required to improve accuracy of a hard mask (HM) for dry etching which is formed on a substrate. 
     PRIOR ART DOCUMENT 
     Patent Document 1: Japanese Patent Laid-open Publication No. 2009-249679 
     In general, however, there are many restrictions for a material of the hard mask. For example, the material of the hard mask needs to have high adhesivity to a substrate and a resist, needs to have high resistance against a heat treatment and an etching processing, and, also, needs to be easily removed. For the reason, conventionally, only a limited material such as SiN (silicon nitride) or TiN (titanium nitride) has been used as the material of the hard mask. 
     In view of this, the present inventors have examined applying a catalyst such as Pd onto a substrate having thereon a film of SiO (silicon oxide) or the like and a film of SiN (silicon nitride) or the like to thereby apply the catalyst only onto the SiN film selectively; and forming a plating layer only on the SiN film by using this catalyst. In this case, since the plating layer formed on the SiN film can be used as a hard mask, it is possible to select various kinds of materials as the plating layer. 
     In this case, it is desirable that the plating layer is formed on the basis of the catalyst on the SiN film in the state that the catalyst is selectively applied on the SiN film and no catalyst is left on the SiO film at all. Actually, however, the catalyst such as the Pd also remains on the SiO film to some extent, and selectivity regarding the application of the catalyst may not be sufficient. In such a case, there is a concern that the plating layer is also precipitated on the SiO film on which the plating layer is not supposed to be formed. 
     In view of the foregoing, exemplary embodiments provide a plating method and a plating apparatus capable of applying a catalyst to a plateable material portion with high selectivity, and a recording medium therefor. 
     SUMMARY 
     In one exemplary embodiment, a plating method comprises preparing a substrate having, on a surface thereof, a plateable material portion and a non-plateable material portion having an OH end group; supplying a polymer compound, which selectively reacts with the OH end group of the non-plateable material portion, onto the substrate; imparting a catalyst to the plateable material portion selectively by performing a catalyst imparting processing on the substrate on which the polymer compound is supplied; forming a plating layer on the plateable material portion selectively by performing a plating processing on the substrate; and removing the polymer compound on the substrate before or after the forming of the plating layer. 
     In another exemplary embodiment, a plating apparatus comprises a substrate holder configured to hold a substrate having, on a surface thereof, a plateable material portion and a non-plateable material portion having an OH end group; a polymer compound supply configured to supply a polymer compound, which selectively reacts with the OH end group of the non-plateable material portion, onto the substrate; a catalyst imparting device configured to impart a catalyst to the plateable material portion selectively by performing a catalyst imparting processing on the substrate on which the polymer compound is supplied; a plating liquid supply configured to supply a plating liquid onto the substrate to thereby form a plating layer on the plateable material portion selectively; and a polymer compound removing device configured to remove the polymer compound on the substrate. 
     In still another exemplary embodiment, a computer-readable recording medium stores thereon computer-executable instructions that, in response to execution, cause the plating apparatus to perform the plating method. 
     According to the exemplary embodiments, it is possible to apply the catalyst to the plateable material portion with high selectivity. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic plan view illustrating a plating apparatus and a plating unit belonging to the plating apparatus. 
         FIG. 2  is a schematic cross sectional view illustrating a configuration of a plating device belonging to the plating unit shown in  FIG. 1 . 
         FIG. 3  is a schematic cross sectional view illustrating a structure of a substrate on which a plating layer is to be formed by a plating method according to an exemplary embodiment. 
         FIG. 4A  to  FIG. 4E  are schematic cross sectional views illustrating a producing method for the substrate on which the plating layer is to be formed by the plating method according to the present exemplary embodiment. 
         FIG. 5  is a flowchart illustrating the plating method according to the present exemplary embodiment. 
         FIG. 6A  to  FIG. 6C  are schematic cross sectional views illustrating the plating method according to the present exemplary embodiment. 
         FIG. 7A  to  FIG. 7C  are schematic cross sectional views illustrating a method of processing the substrate on which the plating layer is formed by the plating method according to the present exemplary embodiment. 
         FIG. 8A  to  FIG. 8C  are schematic diagrams illustrating an operation in which a catalyst adheres to a surface of the substrate. 
         FIG. 9  is a cross sectional view illustrating a configuration of a plating device according to a modification example (modification example 1). 
         FIG. 10  is a flowchart illustrating a plating method according to the modification example (modification example 1). 
         FIG. 11  is a flowchart illustrating a plating method according to another modification example (modification example 2). 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, exemplary embodiments will be described with reference to the accompanying drawings. 
     &lt;Configuration of Plating Apparatus&gt; 
     Referring to  FIG. 1 , a configuration of a plating apparatus according to an exemplary embodiment will be explained.  FIG. 1  is a schematic diagram illustrating the configuration of the plating apparatus according to the exemplary embodiment. 
     As depicted in  FIG. 1 , a plating apparatus  1  according to the exemplary embodiment is equipped with a plating unit  2  and a controller  3  configured to control an operation of the plating unit  2 . 
     The plating unit  2  is configured to perform various processings on a substrate. The various processings performed by the plating unit  2  will be discussed later. 
     The controller  3  is implemented by, for example, a computer, and includes an operation controller and a storage unit. The operation controller is implemented by, for example, a CPU (Central Processing Unit) and is configured to control an operation of the plating unit  2  by reading and executing the programs stored in the storage unit. The storage unit is implemented by a memory device such as, but not limited to, a RAM (Random Access Memory), a ROM (Read Only Memory) or a hard disk, and stores thereon programs for controlling various processings performed in the plating unit  2 . Further, the programs may be recorded in a computer-readable recording medium, or may be installed from the recording medium to the storage unit. The computer-readable recording medium may be, for example, a hard disc (HD), a flexible disc (FD), a compact disc (CD), a magnet optical disc (MO), or a memory card. Stored in the recording medium is a program which, when executed by a computer for controlling an operation of the plating apparatus  1 , allows the computer to control the plating apparatus  1  to perform a plating method to be described later. 
     &lt;Configuration of Plating Unit&gt; 
     Referring to  FIG. 1 , a configuration of the plating unit  2  will be discussed.  FIG. 1  is a schematic plan view illustrating the configuration of the plating unit  2 . 
     The plating unit  2  includes a carry-in/out station  21  and a processing station  22  which is provided adjacent to the carry-in/out station  21 . 
     The carry-in/out station  21  is equipped with a placing section  211  and a transfer section  212  which is provided adjacent to the placing section  211 . 
     In the placing section  211 , transfer containers (hereinafter, referred to as “carriers C”) for accommodating therein a plurality of substrates W horizontally are placed. 
     The transfer section  212  is equipped with a transfer device  213  and a delivery unit  214 . The transfer device  213  is provided with a holding mechanism configured to hold a substrate W and is configured to be movable horizontally and vertically and pivotable around a vertical axis. 
     The processing station  22  includes plating devices  5 . In the present exemplary embodiment, the number of the plating devices  5  belonging to the processing station  22  is two or more. However, only one plating device  5  may be provided. The plating devices  5  are arranged at both sides of a transfer path  221  which extends in a preset direction. 
     A transfer device  222  is provided in the transfer path  221 . The transfer device  222  is equipped with a holding mechanism configured to hold the substrate W and is configured to be movable horizontally and vertically and pivotable around a vertical axis. 
     In the plating unit  2 , the transfer device  213  of the carry-in/out station  21  is configured to transfer the substrate W between the carrier C and the delivery unit  214 . To elaborate, the transfer device  213  takes out the substrate W from the carrier C which is placed in the placing section  211 , and places the substrate W in the delivery unit  214 . Further, the transfer device  213  takes out the substrate W which is placed in the delivery unit  214  by the transfer device  222  of the processing station  22 , and accommodates the substrate W back into the carrier C on the placing section  211 . 
     In the plating unit  2 , the transfer device  222  of the processing station  22  is configured to transfer the substrate W between the delivery unit  214  and the plating device  5  and between the plating device  5  and the delivery unit  214 . To elaborate, the transfer device  222  takes out the substrate W which is placed in the delivery unit  214  and then carries the substrate W into the plating device  5 . Further, the transfer device  222  takes out the substrate W from the plating unit  5  and places the substrate W in the delivery unit  214 . 
     &lt;Configuration of Plating Device&gt; 
     Now, referring to  FIG. 2 , a configuration of the plating device  5  will be explained.  FIG. 2  is a schematic cross sectional view illustrating the configuration of the plating device  5 . 
     The plating device  5  is configured to perform a plating processing on a substrate W having, on a surface thereof, a non-plateable material portion  31  and a plateable material portion  32 , and to form a plating layer  35  selectively on the plateable material portion  32  (refer to  FIG. 3  to  FIG. 7C  to be described later). A substrate processing performed by the plating device  5  includes a catalyst imparting processing and an electroless plating processing at least. However, the substrate processing may further include other processings in addition to the catalyst imparting processing and the plating processing. 
     The plating device  5  is configured to perform the aforementioned substrate processing including the electroless plating processing. The plating device  5  includes a chamber  51 ; a substrate holder  52  provided within the chamber  51  and configured to hold the substrate W; and a plating liquid supply  53  configured to supply a plating liquid M 1  to the substrate W held by the substrate holder  52 . 
     The substrate holder  52  includes a rotation shaft  521  extending in a vertical direction within the chamber  51 ; a turntable  522  provided at an upper end portion of the rotation shaft  521 ; a chuck  523  provided on an outer peripheral portion of a top surface of the turntable  522  and configured to support an edge portion of the substrate W; and a driving unit  524  configured to rotate the rotation shaft  521 . 
     The substrate W is supported by the chuck  523  to be horizontally held by the turntable  522  while being slightly spaced apart from the top surface of the turntable  522 . In the present exemplary embodiment, a mechanism of holding the substrate W by the substrate holder  52  is of a so-called mechanical chuck type in which the edge portion of the substrate W is held by the chuck  523  which is configured to be movable. However, a so-called vacuum chuck type in which a rear surface of the substrate W is vacuum-attracted may be used instead. 
     A base end portion of the rotation shaft  521  is rotatably supported by the driving unit  524 , and a leading end portion of the rotation shaft  521  sustains the turntable  522  horizontally. If the rotation shaft  521  is rotated, the turntable  522  placed on the upper end portion of the rotation shaft  521  is rotated, and, as a result, the substrate W which is held by the turntable  522  with the chuck  523  is also rotated. 
     The plating liquid supply  53  is equipped with a nozzle  531  configured to discharge the plating liquid M 1  onto the substrate W held by the substrate holder  52 ; and a plating liquid source  532  configured to supply the plating liquid M 1  to the nozzle  531 . The plating liquid M 1  is stored in a tank of the plating liquid source  532 , and the plating liquid M 1  is supplied into the nozzle  531  from the plating liquid source  532  through a supply passageway  534  which is equipped with a flow rate controller such as a valve  533 . 
     The plating liquid M 1  is a plating liquid for an autocatalytic (reduction) electroless plating. The plating liquid M 1  contains a metal ion such as a cobalt (Co) ion, a nickel (Ni) ion, or a tungsten (W) ion; and a reducing agent such as hypophosphorous acid or dimethylamineborane. Further, in the autocatalytic (reduction) electroless plating, the metal ion in the plating liquid M 1  is reduced by electrons emitted in an oxidation reaction of the reducing agent in the plating liquid M 1  to be precipitated as a metal, so that a metal film (plating film) is formed. The plating liquid M 1  may further contain an additive or the like. The metal film (plating film) formed by the plating processing with the plating liquid M 1  may be, by way of non-limiting example, CoB, CoP, CoWP, CoWB, CoWBP, NiWB, NiB, NiWP, NiWBP, or the like. P (phosphorus) in the metal film (plating film) is originated from the reducing agent (e.g., hypophosphorous acid) containing P, and B (boron) in the plating film is originated from the reducing agent (e.g., dimethylamineborane) containing B. 
     The nozzle  531  is connected to a nozzle moving device  54 . The nozzle moving device  54  is configured to drive the nozzle  531 . The nozzle moving device  54  includes an arm  541 ; a moving body  542  which is configured to be movable along the arm  541  and has a driving mechanism embedded therein; and a rotating/elevating device  543  configured to rotate and move the arm  541  up and down. The nozzle  531  is provided at the moving body  542 . The nozzle moving device  54  is capable of moving the nozzle  531  between a position above a center of the substrate W held by the substrate holder  52  and a position above a periphery of the substrate W, and is also capable of moving the nozzle  531  up to a stand-by position outside a cup  57  to be described later when viewed from the top. 
     Within the chamber  51 , there are arranged a catalyst solution supply (catalyst imparting device)  55   a , a cleaning liquid supply  55   b , a rinse liquid supply  55   c , and a polymer compound supply  55   d  configured to supply a catalyst solution N 1 , a cleaning liquid N 2 , a rinse liquid N 3 , and a polymer compound N 4  in a liquid state onto the substrate W held by the substrate holder  52 , respectively. 
     The catalyst solution supply (catalyst imparting device)  55   a  includes a nozzle  551   a  configured to discharge the catalyst solution N 1  onto the substrate W held by the substrate holder  52 ; and a catalyst solution source  552   a  configured to supply the catalyst solution N 1  to the nozzle  551   a . The catalyst solution N 1  is stored in a tank of the catalyst solution source  552   a , and the catalyst solution N 1  is supplied to the nozzle  551   a  from the catalyst solution source  552   a  through a supply passageway  554   a  which is provided with a flow rate controller such as a valve  553   a.    
     The cleaning liquid supply  55   b  includes a nozzle  551   b  configured to discharge the cleaning liquid N 2  onto the substrate W held by the substrate holder  52 ; and a cleaning liquid source  552   b  configured to supply the cleaning liquid N 2  to the nozzle  551   b . The cleaning liquid N 2  is stored in a tank of the cleaning liquid source  552   b , and the cleaning liquid N 2  is supplied to the nozzle  551   b  from the cleaning liquid source  552   b  through a supply passageway  554   b  which is provided with a flow rate controller such as a valve  553   b.    
     The rinse liquid supply  55   c  includes a nozzle  551   c  configured to discharge the rinse liquid N 3  onto the substrate W held by the substrate holder  52 ; and a rinse liquid source  552   c  configured to supply the rinse liquid N 3  to the nozzle  551   c . The rinse liquid N 3  is stored in a tank of the rinse liquid source  552   c , and the rinse liquid N 3  is supplied to the nozzle  551   c  from the rinse liquid source  552   c  through a supply passageway  554   c  which is provided with a flow rate controller such as a valve  553   c.    
     The polymer compound supply  55   d  includes a nozzle  551   d  configured to discharge the polymer compound N 4  in the liquid state onto the substrate W held by the substrate holder  52 ; and a polymer compound source  552   d  configured to supply the polymer compound N 4  to the nozzle  551   d . The polymer compound N 4  in the liquid state is stored in a tank of the polymer compound source  552   d , and the polymer compound N 4  is supplied to the nozzle  551   d  from the polymer compound source  552   d  through a supply passageway  554   d  which is provided with a flow rate controller such as a valve  553   d.    
     The catalyst solution N 1  contains a metal ion having catalytic activity to the oxidation reaction of the reducing agent in the plating liquid M 1 . In the electroless plating processing, to allow the precipitation of the metal ion in the plating liquid M 1  to be begun, an initial film surface (that is, a plating target surface of the substrate) need to have sufficient catalytic activity to the oxidation reaction of the reducing agent in the plating liquid M 1 . By way of non-limiting example, such a catalyst may include, iron group elements (Fe, Co, Ni), platinum group elements (Ru, Rh, Pd, Os, Ir, Pt), Cu, Ag or Au. A metal film having the catalytic activity is formed through a replacement reaction. In the replacement reaction, a component forming the plating target surface of the substrate serves as a reducing agent, and the metal ion (for example, a palladium (Pd) ion) in the catalyst solution N 1  is reduced to be precipitated on the plating target surface of the substrate. Further, the catalyst solution N 1  may contain a metal catalyst in the form of nanoparticles. To elaborate, the catalyst solution N 1  may include the metal catalyst in the form of nanoparticles, a dispersant, and an aqueous solution. This metal catalyst in the form of nanoparticles may be, by way of non-limiting example, palladium (Pd) in the form of nanoparticles. Further, the dispersant serves to allow the metal catalyst in the form of nanoparticles to be easily dispersed in the catalyst solution N 1 . 
     As an example of the cleaning liquid N 2 , an organic acid such as a formic acid, malic acid, a succinic acid, a citric acid or a malonic acid, or hydrofluoric acid (DHF) (aqueous solution of hydrogen fluoride) diluted to the extent that it does not corrode the plating target surface of the substrate may be used. 
     As an example of the rinse liquid N 3 , pure water may be used. 
     The polymer compound N 4  is a liquid which selectively reacts with an OH end group of a non-plateable material portion  31  (to be described later) of the substrate W. This polymer compound N 4  has a function of making the catalyst in the catalyst solution N 1  difficult to adsorb into the non-plateable material portion  31  of the substrate W. This polymer compound N 4  is a polymer compound having a weight-average molecular weight (Mw) equal to or larger than 1000, and, specifically, one containing an acryl-based polymer or polyglycerin may be used. Particularly, to allow the polymer compound N 4  on the substrate W to be easily removed by the rinse liquid N 3 , it is desirable to use a water-soluble polymer compound as the polymer compound N 4 . 
     The plating device  5  includes a nozzle moving device  56  configured to move the nozzles  551   a  to  551   d . The nozzle moving device  56  is equipped with an arm  561 ; a moving body  562  which is configured to be movable along the arm  561  and has a moving mechanism embedded therein; and a rotating/elevating device  563  configured to rotate and move the arm  561  up and down. The nozzles  551   a  to  551   d  are provided at the moving body  562 . The nozzle moving device  56  is capable of moving the nozzles  551   a  to  551   d  between a position above the central portion of the substrate W held by the substrate holder  52  and a position above the peripheral portion of the substrate W, and also capable of moving the nozzles  551   a  to  551   d  up to a stand-by position outside the cup  57  to be described later when viewed from the top. In the present exemplary embodiment, though the nozzles  551   a  to  551   d  are held by the common arm, they may be configured to be held by different arms respectively and moved independently. 
     The cup  57  is disposed around the substrate holder  52 . The cup  57  is configured to receive various kinds of processing liquids (e.g., the catalyst solution, the plating liquid, the cleaning liquid, the rinse liquid, the polymer compound, etc.) scattered from the substrate W and drain the received processing liquids to the outside of the chamber  51 . The cup  57  is equipped with an elevating device  58  configured to move the cup  57  up and down. 
     &lt;Structure of Substrate&gt; 
     Now, a structure of the substrate on which the plating layer is to be formed by the plating method according to the present exemplary embodiment will be explained. 
     As depicted in  FIG. 3 , the substrate W on which the plating layer  35  is to be formed has the non-plateable material portion  31  and the plateable material portion  32  respectively formed on the surface thereof. There is no specific limitation in the structure of the non-plateable material portion  31  and the plateable material portion  32  as long as they are exposed at the surface of the substrate W. In the present exemplary embodiment, the substrate W includes a base member  42  made of the plateable material portion  32 ; and a core member  41  which is protruded from the base member  42  and is made of the non-plateable material portion  31  having a pattern shape. 
     The non-plateable material portion  31  is a region where the plating metal is not precipitated and the plating layer  35  is not formed when the plating processing according to the exemplary embodiment is performed. The non-plateable material portion  31  has the OH end group and is made of a material having, for example, SiO 2  as a main component. 
     The plateable material portion  32  is a region where the plating metal is precipitated and the plating layer  35  is formed when the plating processing according to the exemplary embodiment is performed. The plateable material portion  32  has a NH x  end group and is made of a material having, by way of example, but not limitation, SiN as a main component. 
     Now, a method of producing the substrate W shown in  FIG. 3  will be explained with reference to  FIG. 4A  to  FIG. 4E . To produce the substrate W shown in  FIG. 3 , the base member  42  made of the plateable material portion  32  is first prepared, as illustrated in  FIG. 4A . 
     Thereafter, as depicted in  FIG. 4B , a film of a material  31   a , which forms the non-plateable material portion  31 , is formed by a CVD method or a PVD method on the entire surface of the base member  42  which is made of the plateable material portion  32 . The material  31   a  is composed of, for example, the material containing SiO 2  as the main component. 
     Subsequently, as illustrated in  FIG. 4C , a photosensitive resist  33   a  is coated on the entire surface of the material  31   a  forming the non-plateable material portion  31 , and then, is dried. Then, by exposing the photosensitive resist  33   a  through a photo mask and developing it, a resist film  33  having a required pattern is formed, as shown in  FIG. 4D . 
     Afterwards, as depicted in  FIG. 4E , the material  31   a  is dry-etched by using the resist film  33  as a mask. As a result, the core member  41  made of the non-plateable material portion  31  is patterned to have the substantially same shape as the pattern shape of the resist film  33 . Then, by removing the resist film  33 , there is obtained the substrate W having the non-plateable material portion  31  and the plateable material portion  32  formed on the surface thereof. 
     &lt;Plating Method&gt; 
     Now, the plating method using the plating apparatus  1  will be discussed. The plating method performed by plating apparatus  1  includes a plating processing upon the aforementioned substrate W. The plating processing is performed by the plating device  5 . An operation of the plating device  5  is controlled by the controller  3 . 
     First, the substrate W having the non-plateable material portion  31  and the plateable material portion  32  formed on the surface thereof is prepared by performing the above-described method of  FIG. 4A  to  FIG. 4E  (preparation process: process  51  of  FIG. 5 ) (see  FIG. 6A ). 
     The prepared substrate W is then carried into the plating device  5  to be held by the substrate holder  52  (see  FIG. 2 ). In the meanwhile, the controller  3  controls the elevating device  58  to move the cup  57  down to a preset position. Then, the controller  3  controls the transfer device  222  to place the substrate W on the substrate holder  52 . The substrate W is horizontally placed on the turntable  522  with its periphery portion held by the chuck  523 . 
     Then, the substrate W held by the substrate holder  52  is subjected to a cleaning processing (pre-cleaning process: process S 2  of  FIG. 5 ). At this time, while controlling the driving unit  524  to rotate the substrate W held by the substrate holder  52  at a preset speed, the controller  3  controls the cleaning liquid supply  55   b  to locate the nozzle  551   b  at a position above the substrate W and to supply the cleaning liquid N 2  onto the substrate W from the nozzle  551   b . The cleaning liquid N 2  supplied onto the substrate W is diffused on the surface of the substrate W by a centrifugal force which is caused by the rotation of the substrate W. As a result, a deposit or the like adhering to the substrate W is removed from the substrate W. The cleaning liquid N 2  scattered from the substrate W is drained through the cup  57 . 
     Subsequently, the substrate W after being cleaned is subjected to a rinsing processing (rinsing process: process S 3  of  FIG. 5 ). At this time, while controlling the driving unit  524  to rotate the substrate W held by the substrate holder  52  at a preset speed, the controller  3  controls the rinse liquid supply  55   c  to locate the nozzle  551   c  at a position above the substrate W and to supply the rinse liquid N 3  onto the substrate W from the nozzle  551   c . The rinse liquid N 3  supplied onto the substrate W is diffused on the surface of the substrate W by the centrifugal force which is caused by the rotation of the substrate W. As a result, the cleaning liquid N 2  remaining on the substrate W is washed away. The rinse liquid N 3  scattered from the substrate W is drained through the cup  57 . 
     Thereafter, by supplying the polymer compound N 4  in the liquid state onto the substrate W held by the substrate holder  52 , a polymer film is formed on the substrate W (polymer compound supplying process: process S 4  of  FIG. 5 ). At this time, while controlling the driving unit  524  to rotate the substrate W held by the substrate holder  52  at a preset speed, the controller  3  controls the polymer compound supply  55   d  to locate the nozzle  551   d  at a position above the substrate W and to supply the polymer compound N 4  onto the substrate W from the nozzle  551   d . By way of non-limiting example, an acryl-based polymer or polyglycerin is used as the polymer compound N 4 . The polymer compound N 4  in the liquid state supplied onto the substrate W is diffused on the surface of the substrate W by the centrifugal force which is caused by the rotation of the substrate W. This polymer compound N 4  selectively reacts with the OH end group of the non-plateable material portion  31  to produce a polymer film  37 . Thus, the polymer film  37  is thinly formed selectively on a surface of the non-plateable material portion  31  of the substrate W (see  FIG. 6B ). This polymer film  37  serves to suppress adhesion of the catalyst to the non-plateable material portion  31  in a catalyst imparting process. The polymer compound N 4  scattered from the substrate W is drained through the cup  57 . 
     Subsequently, the substrate W having the polymer film  37  formed thereon is subjected to a catalyst imparting processing (catalyst imparting process: process S 5  of  FIG. 5 ). At this time, while controlling the driving unit  524  to rotate the substrate W held by the substrate holder  52  at a preset speed, the controller  3  controls the catalyst solution supply  55   a  to locate the nozzle  551   a  at a position above the substrate W and to supply the catalyst solution N 1  onto the substrate W from the nozzle  551   a . The catalyst solution N 1  supplied onto the substrate W is diffused on the surface of the substrate W by the centrifugal force which is caused by the rotation of the substrate W. The catalyst solution N 1  scattered from the substrate W is drained through the cup  57 . 
     Accordingly, the catalyst is imparted to the plateable material portion  32  of the substrate W selectively, and a metal film having catalytic activity is formed on the plateable material portion  32 . Meanwhile, the catalyst is not substantially imparted to the non-plateable material portion  31  of the substrate W, which has the SiO 2  as the main component, and the metal film having catalytic activity is not formed on this non-plateable material portion  31 . As a non-limiting example of such a metal having catalytic activity, iron group elements (Fe, Co, Ni), platinum group elements (Ru, Rh, Pd, Os, Ir, Pt), Cu, Ag or Au may be used. These metals have high adsorption property with respect to the material (e.g., SiN) forming the plateable material portion  32 , whereas the metals are difficult to adsorb to the material (e.g., SiO 2 ) forming the non-plateable material portion  31 . Thus, by using these metals, it is possible to allow the plating metal to be selectively precipitated on the plateable material portion  32 . Specifically, the catalyst solution N 1  may include the Pd catalyst in the form of nanoparticles, the dispersant, and the aqueous solution. Furthermore, the catalyst solution N 1  may further include an adsorption accelerator which accelerates the adsorption of the aforementioned metals having catalytic activity. 
     Further, in the present exemplary embodiment, the non-plateable material portion  31  is selectively covered with the polymer film  37  of the polymer compound N 4 . Accordingly, the adhesion of the catalyst to the non-plateable material portion  31  is suppressed. Meanwhile, since the plateable material portion  32  is not covered with the polymer film  37 , the catalyst is adsorbed to the plateable material portion  32  securely. 
     Thereafter, the substrate W having the plateable material portion  32  to which the catalyst is selectively imparted is subjected to a cleaning processing (catalyst solution and polymer compound removing process: process S 6  of  FIG. 5 ). At this time, while controlling the driving unit  524  to rotate the substrate W held by the substrate holder  52  at a preset speed, the controller  3  controls the rinse liquid supply  55   c  to locate the nozzle  551   c  at a position above the substrate W and to supply the rinse liquid N 3  onto the substrate W from the nozzle  551   c . The rinse liquid N 3  supplied onto the substrate W is diffused on the surface of the substrate W by the centrifugal force which is caused by the rotation of the substrate W. Accordingly, the catalyst solution N 1  remaining on the substrate W is washed away. Concurrently, the polymer film  37  formed by the water-soluble polymer compound N 4  is also removed by the rinse liquid N 3 . The rinse liquid N 3  and the polymer compound N 4  scattered from the substrate W are drained through the cup  57 . Here, the substrate W may be cleaned by using alkaline water or an acidic cleaning liquid such as hydrofluoric acid (DHF), instead of the rinse liquid N 3 . 
     Subsequently, the substrate W is subjected to a plating processing, and the plating is selectively performed on the plateable material portion  32  (plating process: process S 7  of  FIG. 5 ). Accordingly, the plating layer  35  is formed on the plateable material portion  32  (see  FIG. 6C ). The plating layer  35  is formed at a portion of the plateable material portion  32  which is not covered with the non-plateable material portion  31 . At this time, while controlling the driving unit  524  to rotate the substrate W held by the substrate holder  52  at a preset speed or while maintaining the substrate W held by the substrate holder  52  stopped, the controller  3  controls the plating liquid supply  53  to locate the nozzle  531  at a position above the substrate W and to supply the plating liquid M 1  onto the substrate W from the nozzle  531 . As a result, the plating metal is selectively precipitated on the plateable material portion  32  of the substrate W (specifically, on the metal film having catalytic activity formed on the surface of the plateable material portion  32 ), so that the plating layer  35  is formed. Meanwhile, since the metal film having catalytic activity is not formed on the non-plateable material portion  31  of the substrate W, no plating metal is precipitated on the non-plateable material portion  31 , so that no plating layer  35  is formed thereon 
     Upon the completion of the plating processing as described above, the substrate W held by the substrate holder  52  is subjected to a cleaning processing (post-cleaning process: process S 8  of  FIG. 5 ). At this time, while controlling the driving unit  524  to rotate the substrate W held by the substrate holder  52  at a preset speed, the controller  3  controls the cleaning liquid supply  55   b  to locate the nozzle  551   b  at the position above the substrate W and to supply the cleaning liquid N 2  onto the substrate W from the nozzle  551   b . The cleaning liquid N 2  supplied onto the substrate W is diffused on the surface of the substrate W by the centrifugal force which is caused by the rotation of the substrate W. Accordingly, an abnormal plating film or a reaction by-product adhering to the substrate W is removed from the substrate W. The cleaning liquid N 2  scattered from the substrate W is drained through the cup  57 . 
     Then, while controlling the driving unit  524  to rotate the substrate W held by the substrate holder  52  at a preset speed, the controller  3  controls the rinse liquid supply  55   c  to locate the nozzle  551   c  at the position above the substrate W and to supply the rinse liquid N 3  onto the substrate W from the nozzle  551   c  (rinsing process: process S 9  of  FIG. 5 ). Accordingly, the plating liquid M 1 , the cleaning liquid N 2  and the rinse liquid N 3  on the substrate W are scattered from the substrate W by the centrifugal force which is caused by the rotation of the substrate W, and are drained through the cup  57 . 
     Thereafter, the substrate W on which the plating layer  35  is formed is carried out of the plating device  5 . At this time, the controller  3  controls the transfer device  222  to take out the substrate W from the plating device  5  and place the taken-out substrate W in the delivery unit  214 . Then, the controller  3  controls the transfer device  213  to take out the substrate W placed in the delivery unit  214  and to carry the substrate W into the carrier C in the placing section  211 . 
     Then, the substrate W is etched by using the plating layer  35  as a hard mask. 
     In this case, the non-plateable material portion  31  is first removed selectively from the substrate W which is taken out of the plating device  5  ( FIG. 7A ). Meanwhile, the plating layer  35  formed on the plateable material portion  32  remains without being removed. 
     Subsequently, as shown in  FIG. 7B , the base member  42  made of the plateable material portion  32  is dry-etched by using the plating layer  35  as the hard mask. Accordingly, the portion of the base member  42  which is not covered with the plating layer  35  is etched to a preset depth, and recesses having a pattern shape are formed. 
     Afterwards, by removing the plating layer  35  through a wet cleaning method, the base member  42  provided with the recesses having the pattern shape is obtained, as illustrated in  FIG. 7C . Since the plating layer  35  can be removed by the wet cleaning method, it is easy to remove the plating layer  35 . An acidic solvent is employed as a chemical liquid used in this wet cleaning method. 
     As described above, according to the present exemplary embodiment, the polymer compound N 4  which reacts with the OH end group of the non-plateable material portion  31  selectively is supplied onto the substrate W. As a result, the non-plateable material portion  31  can be covered with the polymer film  37  selectively. Thereafter, by performing the catalyst imparting processing on the substrate W, the catalyst is selectively imparted to the plateable material portion  32 . At this time, the catalyst does not adhere to the non-plateable material portion  31  which is covered with the polymer film  37 . In this way, since the catalyst can be imparted to the plateable material portion  32  with high selectivity, it is possible to suppress the plating layer from being formed on the non-plateable material portion  31  on which the plating layer is not intended to be formed. 
     The reason why the catalyst can be imparted to the plateable material portion  32  with high selectivity with the polymer film  37  of the polymer compound N 4  is deemed to be as follows. 
     That is, when the polymer compound N 4  is supplied onto the substrate W (process S 4  of  FIG. 5 ), the polymer compound N 4  selectively reacts with the OH end group of the non-plateable material portion  31 , as shown in  FIG. 8A . As a result, the polymer compound N 4  forms the polymer film  37  and covers the non-plateable material portion  31 . Meanwhile, since no OH end group exists on the plateable material portion  32 , the polymer film  37  does not substantially cover the plateable material portion  32 . 
     Subsequently, a catalyst Cat is imparted to the substrate W (process S 5  of  FIG. 5 ), as shown in  FIG. 8B . At this time, the catalyst Cat reacts with the NH x  end group of the plateable material portion  32 , and the catalyst Cat is adsorbed to the plateable material portion  32 . Meanwhile, since the non-plateable material portion  31  is covered with the polymer film  37 , the adsorption of the catalyst Cat is hampered. Thus, the catalyst Cat is not substantially adsorbed to the non-plateable material portion  31 . 
     Thereafter, by performing the cleaning processing on the substrate W to remove the catalyst solution and the polymer film  37  (process S 6  of  FIG. 5 ), the polymer film  37  covering the non-plateable material portion  31  is washed away, as depicted in  FIG. 8C . Meanwhile, the catalyst Cat adsorbed to the plateable material portion  32  is not substantially washed away by the rinse liquid N 3  or the like, but remains adsorbed to the plateable material portion  32 . In this way, by supplying the polymer compound N 4  onto the substrate W, it is possible to impart the catalyst to the plateable material portion  32  with high selectivity. 
     MODIFICATION EXAMPLES 
     Now, various modification examples of the present exemplary embodiment will be explained. Further, in the various drawings illustrating the following modification examples, the same parts as those described in the above exemplary embodiment will be assigned same reference numerals. Further, in the following, redundant description upon common features will be omitted, while focusing on distinctive features from the above-described exemplary embodiment. 
     Modification Example 1 
       FIG. 9  and  FIG. 10  are diagrams illustrating a modification example (modification example 1) of the present exemplary embodiment. As depicted in  FIG. 9 , the plating device  5  may be further equipped with an adsorption accelerating material supply  55   e  configured to supply an adsorption accelerating material N 5  onto the substrate W held by the substrate holder  52 . This adsorption accelerating material supply  55   e  includes a nozzle  551   e  configured to discharge the adsorption accelerating material N 5  onto the substrate W held by the substrate holder  52 ; and an adsorption accelerating material source  552   e  configured to supply the adsorption accelerating material N 5  to the nozzle  551   e . The adsorption accelerating material N 5  in a liquid state is stored in a tank of the adsorption accelerating material source  552   e , and the adsorption accelerating material N 5  is supplied into the nozzle  551   e  from the adsorption accelerating material source  552   e  through a supply passageway  554   e  which is equipped with a flow rate controller such as a valve  553   e . The nozzle  551   e  is held by the arm  561  to be movable along with the nozzles  551   a  to  551   d.    
     The adsorption accelerating material N 5  is a liquid which selectively reacts with the NH x  end group of the plateable material portion  32  of the substrate W. This adsorption accelerating material N 5  has a function of allowing the catalyst in the catalyst solution N 1  to be more easily adsorbed into the plateable material portion  32 . By way of non-limiting example, one including a thiol compound or a triazole compound may be used as the adsorption accelerating material N 5 . 
     In this case, a process of supplying the adsorption accelerating material N 5  onto the substrate W (adsorption accelerating material supplying process: process S 10 ) is performed before a catalyst imparting process (process S 5 ) and after the polymer compound supplying process (process S 4 ), as shown in  FIG. 10 . 
     In this adsorption accelerating material supplying process (process S 10 ), the adsorption accelerating material N 5  is supplied onto the substrate W. At this time, while controlling the driving unit  524  to rotate the substrate W held by the substrate holder  52  at a preset speed, the controller  3  controls the adsorption accelerating material supply  55   e  to locate the nozzle  551   e  at a position above the substrate W and to supply the adsorption accelerating material N 5  onto the substrate W from the nozzle  551   e . The adsorption accelerating material N 5  supplied onto the substrate W is diffused on the surface of the substrate W by a centrifugal force which is caused by the rotation of the substrate W. This adsorption accelerating material N 5  selectively reacts with the NH x  end group of the plateable material portion  32  to produce a film of the adsorption accelerating material N 5 . As a result, a film of the adsorption accelerating material N 5  is formed on the surface of the plateable material portion  32  of the substrate W selectively. This adsorption accelerating material N 5  serves to accelerate the adhesion of the catalyst to the plateable material portion  32  in the catalyst imparting process. The adsorption accelerating material N 5  scattered from the substrate W is drained through the cup  57 . 
     Then, the substrate W having the film of the adsorption accelerating material N 5  formed on the plateable material portion  32  and the polymer film  37  formed on the non-plateable material portion  31  is subjected to the catalyst imparting processing (catalyst imparting process: process S 5  of  FIG. 5 ), the same as in the above-described exemplary embodiment. Thereafter, in a catalyst solution, polymer compound and adsorption accelerating material removing process (process S 6 ), by discharging the rinse liquid N 3  onto the substrate W, the catalyst solution N 1 , the polymer film  37  and the adsorption accelerating material N 5  are washed away to be removed by the rinse liquid N 3 . 
     Modification Example 2 
       FIG. 11  is a diagram illustrating another modification example (modification example 2) of the present exemplary embodiment. The present exemplary embodiment has been described for the example where the catalyst solution and polymer compound removing process (process S 6 ) of removing the polymer compound N 4  on the substrate W is performed before the plating process (process S 7 ) of forming the plating layer  35 . As depicted in  FIG. 11 , however, a polymer compound removing process (process S 11 ) may be performed after the plating process (process S 7 ). By way of example, in case that the polymer film  37  of the polymer compound N 4  is made of a material which is not removable by the rinse liquid N 3 , the non-plateable material portion  31  may be kept covered with the polymer film  37  in the plating process (process S 7 ). Then, upon the completion of the plating process (process S 7 ), the polymer compound N 4  is removed by being washed away by a cleaning liquid capable of dissolving the polymer compound N 4 . In such a case, the precipitation of the plating metal on the non-plateable material portion  31  can be suppressed more securely. Furthermore, in the plating method shown in  FIG. 11  as well, an adsorption accelerating material supplying process (process S 10 ) may be performed after the polymer compound supplying process (process S 4 ) and before the catalyst imparting process (process S 5 ). 
     Modification Example 3 
     The present exemplary embodiment has been described for the example where the catalyst imparting process (process S 5 ) is performed after the polymer compound supplying process (process S 4 ). However, the exemplary embodiment is not limited thereto, and a preliminary polymer compound removing process of removing a small amount of the polymer film  37  adhering to the plateable material portion  32  on the substrate W may be performed before the catalyst imparting process (process S 5 ) and after the polymer compound supplying process (process S 4 ). There may be assumed a case where the polymer film  37  adheres on the plateable material portion  32  for some reasons. In such a case, by supplying a small amount of, for example, a rinse liquid or a chemical liquid onto the substrate W to the extent that the polymer film  37  covering the non-plateable material portion  31  is not completely removed, the unnecessary polymer film  37  on the plateable material portion  32  can be washed away to be removed. 
     Although the various exemplary embodiments have been described so far, those exemplary embodiments are not limiting and can be modified in various ways without departing from the technical conception and essence of the present disclosure. Further, the constituent components described in the above exemplary embodiments may be combined appropriately to produce various other embodiments, and may be partially deleted in various ways. Further, the constituent components in the different exemplary embodiments may be appropriately combined.