Patent Publication Number: US-2015068456-A1

Title: Mask adjustment unit, mask device, and apparatus and method for producing mask

Description:
TECHNICAL FIELD 
     The present technology relates to a mask adjustment unit, a mask device on which the mask adjustment unit is mounted, and an apparatus and a method for producing the mask device that adjust stress applied to a mask used for deposition or the like. 
     BACKGROUND ART 
     From the past, in a process of producing a display apparatus using an organic EL (Electro-Luminescence) device, for example, a pattern of a material film is formed on each pixel of red, green, and blue (RGB) of a substrate by vacuum deposition using a mask for deposition. 
     Such a mask for deposition is produced in the following way. First, a mask foil in which many fine opening patterns are provided is prepared by electro-casting, a photoetching method, or the like. Next, in a state where tension force is applied to this mask, the mask is fixed to a supporting frame by welding or the like. If the mask is fixed as described above, it has been difficult to adjust the tension force of the mask after the fixation. 
     In general, a mask has different stress distribution depending on the coarse density of forming density of the opening pattern or non-uniform distribution of the film thickness caused during electro-casting or rolling. Furthermore, because there is an individual difference in the deformation amount of a supporting frame of the mask itself, it is very difficult to predict modification in advance by deformation analysis or the like. In view of the above, a method of correcting the position of the opening pattern after the mask is fixed to the frame is proposed in Patent Document 1. 
     The mask for deposition described in Patent Document 1 includes a mask main body held by a mask frame, a guide member attached to at least one side of the mask main body, and a tension force applying means for applying predetermined tension force to the mask main body via the guide member. The tension force applying means includes a screw hole formed on a side wall of the guide member and a screw whose tip portion is brought into contact with a side surface of the mask frame, which can be inserted into the screw hole. An operator can apply tension force to the mask main body by tightening or loosening the screw (see, for example, paragraphs [0031] to [0035] of the specification and FIG. 4 of Patent Document 1). 
     CITATION LIST 
     Patent Document 
     
         
         Patent Document 1: Japanese Patent Application Laid-open No. 2004-6257 
       
    
     DISCLOSURE OF THE INVENTION 
     Problem to be Solved by the Invention 
     However, the structure of the tension force applying means described in Patent Document 1 is a structure in which the tension force is increased as the degree of tightening is increased. Specifically, because it is only a structure in which tension force is applied to the mask main body, it is difficult to appropriately adjust the position of the mask pattern formed on the mask. 
     It is an object of the present invention to provide techniques such as a mask adjustment unit capable of appropriately adjusting the position of the mask pattern. 
     Means for Solving the Problem 
     In order to achieve the above-mentioned object, a mask adjustment unit according to the present technology includes a base body, a movable member, and an adjustment mechanism. 
     The movable member supports a side of an outer edge portion of a mask main body and is movably provided on the base body, the mask main body having the outer edge portion. 
     The adjustment mechanism applies, to the mask body via the movable member, both pulling tension force from the outer edge portion of the mask main body to outside of the mask main body and pressing force pressing from the outer edge portion to inside of the mask main body, the mask body being supported by the movable member. 
     Because the adjustment mechanism can apply both tension force and pressing force to the mask main body, it is possible to fine adjust the position of the mask pattern provided on the mask main body, appropriately. 
     The adjustment mechanism may include at least one bolt that acts on the movable member. The bolt may act on the movable member directly or indirectly. 
     The adjustment mechanism may include a first bolt that applies the tension force to the mask main body, and a second bolt that applies the pressing force to the mask main body. 
     The adjustment mechanism may have a supporting portion that supports the first bolt and the second bolt, the supporting portion being provided on the base body. Moreover, the movable member may have a screw hole into which the first bolt is inserted and a contact area with which an end portion of the second bolt is brought into contact. 
     With the two first and second bolts, it is possible to generate tension force and pressing force. 
     The adjustment mechanism may further include a conversion member that is connected to at least one of the first bolt and the second bolt. The conversion member converts power of the at least one bolt in a first moving direction into power in a second moving direction, and transmits the converted power to the movable member, the second moving direction being different from the first moving direction. 
     As described above, the transmitting member may convert power in a moving direction of a bolt into power in a direction different from that, and move the movable member. 
     The adjustment mechanism may further include a fixed body and a transmitting member. The fixed body is provided on the base body. The transmitting member may be connected to the base body with any one of the first bolt and the second bolt between the fixed body and the movable member, convert power of any one of the first bolt and the second bolt in a first moving direction into power in a second moving direction, and transmit the converted power to the movable member, the second moving direction being different from the first moving direction. 
     The transmitting member may be an elastic body that acts on the movable member by an elastic deformation. Because an elastic deformation of an elastic body is used, it is possible to fine adjust the position of a mask pattern with high accuracy. 
     The movable member may have a tapered surface. The fixed body may have a tapered surface facing the tapered surface of the movable member and may be provided on the base body so that interval between the tapered surface of the movable member and the tapered surface of the fixed body changes toward a vertical direction of a pattern surface on which a mask pattern is formed, the mask main body having the pattern surface. The transmitting member may be a block member arranged between the tapered surface of the movable member and the tapered surface of the fixed body so that the block member is brought into contact with the tapered surfaces. 
     The adjustment mechanism may further have a supporting portion provided on the base body, which supports the bolt, and a regulation portion that regulates movement of the bolt along an inserting and removing direction of the bolt with respect to the supporting portion. Accordingly, the adjustment mechanism can generate both tension force and pressing force with one bolt for adjustment. 
     The adjustment mechanism may include a first cam member that applies the tension force to the mask main body, and a second cam member that applies the pressing force to the mask main body. Accordingly, the adjustment mechanism can generate both tension force and pressing force without a bolt for adjustment. 
     The adjustment mechanism may include a piezoelectric element capable of applying the tension force and the pressing force to the mask main body. 
     The mask adjustment unit may further include an adjustment frame and an adjustment member. 
     The adjustment frame is connected to the base body so that the adjustment frame faces the base body in a direction vertical to a pattern surface on which a mask pattern is formed and a gap is formed between the adjustment frame and the base body, the mask main body having the pattern surface. 
     The adjustment member adjusts a distance of the gap in the vertical direction. Accordingly, because a gap is formed between the adjustment frame and the base body and the distance of the gap is adjusted by the adjustment member, it is possible to correct the deflection of the mask main body or to pull-up the mask main body in a direction opposite to a gravity direction. 
     A mask device according to the present technology includes a mask main body and the above-mentioned mask adjustment unit that supports the mask main body. 
     A mask producing apparatus according to the present technology is a mask producing apparatus for producing a mask device by adjusting a position of a mask pattern of a mask main body having an outer edge portion, a pattern surface, and the mask pattern formed on the pattern surface. 
     The mask producing apparatus includes a detection unit, an operating device, and a controller. 
     The detection unit detects actual location information being location information on the mask pattern in the pattern surface in a state where the mask main body of the mask device is supported by a movable member. 
     The operating device drives the adjustment mechanism of the mask device. 
     The controller acquires designing location information being location information of the mask pattern out of designing information of the mask main body, and calculates an amount of displacement of the actual location information from the designing location information based on the acquired designing location information and the detected actual location information. Then, the controller controls the operating device based on the calculated displacement amount. 
     Accordingly, it is possible to automatically adjust the position of a mask pattern of a mask main body, appropriately. Therefore, it is possible to increase the productivity of a device to be produced by the mask device. 
     The operating device may include a motor and a reducer that reduces drive of the motor. Accordingly, it is possible to fine adjust the position of a mask pattern with high accuracy. 
     The mask producing apparatus may further include a guide mechanism that allows the operating device to move along the mask main body. Accordingly, it is possible to change the position at which stress is applied by an operating device via an adjustment mechanism. 
     A mask producing method according to the present technology is a mask producing method for producing a mask device by adjusting a position of a mask pattern of a mask main body having an outer edge portion, a pattern surface, and the mask pattern formed on the pattern surface. 
     Actual location information being location information of the mask pattern in the pattern surface is detected in a state where the mask main body of the mask device is supported by a movable member. 
     Designing location information being location information of the mask pattern out of designing information of the mask main body is acquired. 
     An amount of displacement of the actual location information from the designing location information is calculated based on the acquired designing location information and the detected actual location information. 
     An operating device that drives the adjustment mechanism of the mask is controlled based on the calculated displacement amount. 
     Effect of the Invention 
     According to the present technology, it is possible to appropriately adjust the position of a mask pattern. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a perspective view showing a mask including a mask adjustment unit according to a first embodiment of the present technology. 
         FIG. 2  is a plan view of the mask adjustment unit shown in  FIG. 1 . 
         FIG. 3  is an enlarged view showing an example of a mask pattern. 
         FIG. 4  is a schematic diagram of a cross-section taken along the line C-C in  FIG. 2 . 
         FIG. 5  is a diagram showing an enlarged site surrounded by an alternate long and short dash line E (a part of the adjustment mechanism) in  FIG. 2 . 
         FIG. 6A  is a cross-sectional view taken along the line A-A in  FIG. 5 , and  FIG. 6B  is a cross-sectional view taken along the line B-B in  FIG. 5 . 
         FIG. 7  is a cross-sectional view taken along the line D-D in  FIG. 2 . 
         FIG. 8  is a diagram showing deflection of a base frame. 
         FIGS. 9A  to C are each a cross-sectional view showing an example of a position holding mechanism. 
         FIG. 10  is a cross-sectional view showing an example of the position holding mechanism. 
         FIG. 11  shows the position holding mechanism that holds the position of a mask main body after the position is adjusted by the adjustment mechanism shown in  FIG. 10 . 
         FIG. 12  is a cross-sectional view of an adjustment mechanism of a mask adjustment unit according to a third embodiment of the present technology viewed in the Z-axis direction. 
         FIG. 13A  is a plan view an adjustment mechanism of a mask adjustment unit according to a fourth embodiment of the present technology.  FIG. 13B  is a cross-sectional view taken along the line E-E in  FIG. 13A . 
         FIG. 14  is a plan view showing an adjustment mechanism of a mask adjustment unit according to a fifth embodiment of the present technology. 
         FIG. 15A  is a cross-sectional view taken along the line F-F in  FIG. 14 .  FIG. 15B  is a cross-sectional view taken along the line G-G in  FIG. 14 . 
         FIG. 16  is a cross-sectional view of an adjustment mechanism of a mask adjustment unit according to a sixth embodiment of the present technology viewed in the Z-axis direction. 
         FIG. 17  is a cross-sectional view of an adjustment mechanism of a mask adjustment unit according to a seventh embodiment of the present technology viewed in the Y-axis direction. 
         FIG. 18A  is a plan view showing an adjustment mechanism of a mask adjustment unit according to an eighth embodiment of the present technology.  FIG. 18B  is a cross-sectional view taken along the line H-H in  FIG. 18A . 
         FIG. 19A  is a plan view showing an adjustment mechanism of a mask adjustment unit according to a ninth embodiment of the present technology.  FIG. 19B  is a cross-sectional view taken along the line I-I in  FIG. 19A . 
         FIG. 20  is a diagram showing a mask producing apparatus. 
         FIG. 21  is a perspective view showing one operating device. 
         FIG. 22  is a perspective view showing a state where a mask device is set on a mask producing apparatus. 
         FIG. 23  is a perspective view showing a mask producing apparatus according to another example. 
     
    
    
     MODE(S) FOR CARRYING OUT THE INVENTION 
     Hereinafter, embodiments according to the present technology will be described with reference to the drawings. 
     First Embodiment 
     Mask Adjustment Unit and Mask Device 
       FIG. 1  is a perspective view showing a mask device including a mask adjustment unit according to a first embodiment of the present technology.  FIG. 2  is a plan view thereof. 
     A mask device  100  includes a mask main body  55  formed as mask foil and a mask adjustment unit  50  that supports the mask main body  55 . The mask device  100  typically can be used as a mask for deposition in a process of producing a display device using an organic EL device. 
     The mask main body  55  includes mainly a metal material such as nickel (Ni), inver (Fe/Ni alloy), and copper (Cu). The thickness of the mask main body  55  is typically about 10 to 50 μm. The mask main body  55  has a pattern surface  551  on which a mask pattern is formed. For example, on the mask main body  55 , three pattern areas  552  are formed so that three display surfaces can be formed. In the respective pattern areas  552 , the same mask pattern is formed, for example. 
     The mask pattern is, for example, a plurality of passing holes (through-holes) arranged in a matrix pattern or a staggered pattern, and one passing hole is an element for forming one pixel area in a display device. For example, the passing hole has a slit, slot, or circle shape. Via the passing hole, a low-molecule organic EL material is deposited on a substrate that is not shown. In the case of three colors of RGB, three mask devices are used depending on the number of colors. Examples of the passing hole of the mask main body  55  include a passing hole shown in  FIG. 3  (black part). 
     In a state where tension force is applied to the mask main body  55  to some extent, the mask main body  55  is fixed to the mask adjustment unit  50  by spot welding (by, for example, electrical resistance or a laser) and is supported. 
     The mask adjustment unit  50  includes a rectangular base frame (base body)  10  having an opening  10   a . In addition, the mask adjustment unit  50  includes four movable members  20  provided corresponding to four sides of the base frame  10 . Each of the movable members  20  has a long shape along the X and Y axis. 
     The size of the outer shape of a rectangular portion formed by the four movable members  20  is almost the same as or a little larger than the size of the outer shape of the mask main body  55 . On the upper surface of the movable members  20 , an outer edge portion  553  of the mask main body  55  is fixed by welding. The mask main body  55  is fixed to the movable member  20  so that three pattern areas  552  of the mask main body  55  are housed in the opening  10   a  of the base frame  10  when viewed in the Z-axis direction. The Z-axis direction is a direction vertical to the pattern surface  551  of the mask main body  55 , on which a mask pattern is formed. 
     Each of the movable members  20  has almost the same structure. For example, a screw hole is formed on the upper surface of both end portions of one movable member  20 , and the movable member  20  is connected to the base frame  10  by a screw that is not shown. Therefore, areas other than the end portions of the movable member  20  are movable to be deformed along the X-axis direction (or the Y-axis direction) as will be described later. 
     The mask adjustment unit  50  includes an adjustment mechanism  40  that applies stress to the mask main body  55  via the above-mentioned movable member  20 . The adjustment mechanism  40  includes a pulling bolt (first bolt)  41  that applies tension force (pulling force) to the mask main body  55  and a pressing bolt (second bolt)  42  that applies pressing force to the mask main body  55 . In addition, the adjustment mechanism  40  includes a supporting member (supporting portion)  30  that supports the pulling bolt  41  and the pressing bolt  42 . 
     Four supporting members  30  are provided corresponding to four sides of the base frame  10 , for example, and each of which has a long shape. These supporting members  30  have almost the same structures. These supporting members  30  are arranged outside of the movable member  20  on the base frame  10 . The supporting member  30  has many screw holes  30   a  along the longitudinal direction thereof, and each supporting member  30  is fixed to the base frame  10  by a screw that is not shown. 
     It should be noted that the supporting member  30  may be formed by casting with the material of the base frame  10 . 
     The pulling bolt  41  and the pressing bolt  42  are arranged adjacent to each other. With the pulling bolt  41  and the pressing bolt  42  as a set of bolts, a plurality of sets of bolts are arranged at a predetermined pitch in the X- and Y-axis directions. The distance between the pulling bolt  41  and the pressing bolt  42  can be appropriately set. Moreover, the pitch for each set of bolts ( 41  and  42 ) can be appropriately set similarly. 
     In the mask adjustment unit  50 , typically, the material of the base frame  10 , the supporting member  30 , the movable member  20 , and the like includes a material having the thermal expansion coefficient of the material of a substrate to be a processing target (substrate on which an organic material is deposited). This aims to expand/contract the mask device  100  and the substrate in synchronization with each other and make the change amount of the size due to the expansion and contraction equivalent with a temperature change during a deposition process. Moreover, it is favorable that the base frame  10  has a sufficient thickness and a high rigidity to make the deformation amount as little as possible and the weight of the base frame  10  is reduced to a realistic weight taking into account transporting or handling. 
     Moreover, by at least using a relatively soft material, i.e., a material having a low Young&#39;s modulus, as the material of the movable member  20 , it is possible to perform fine adjustment with high accuracy. By making a cut in the movable member  20 , for example, it is possible to enlarge the movable range further. 
       FIG. 4  is a schematic diagram of a cross-section taken along the line C-C in  FIG. 2 . Fixing bolts  21  are attached to both end portions of the movable member  20  and the base frame  10 . With these fixing bolts  21 , the end portions of the movable member  20  are fixed to the base frame  10 . Areas other than the end portions of the movable member  20  are movable in the horizontal direction (X- or Y-axis direction) by deformation with respect to the base frame  10 . 
       FIG. 5  is a diagram showing an enlarged site surrounded by an alternate long and short dash line E (a part of the adjustment mechanism  40 ) in  FIG. 2 .  FIG. 6A  is a cross-sectional view taken along the line A-A in  FIG. 5 , and  FIG. 6B  is a cross-sectional view taken along the line B-B in  FIG. 5 . 
     As shown in  FIGs. 6A  and B, the mask main body  55  is bonded to the movable member  20  by welding (shown by a welding point L). As the pulling bolt  41  and the pressing bolt  42 , the same bolt is used basically. For example, a bolt having a size from M2 (diameter of 2 mm) to M5 (diameter of 5 mm) is used. However, it is not limited thereto. 
     The range in the X-axis direction (and the y-axis direction) in which the plurality of sets of bolts ( 41  and  42 ) are arranged can be set appropriately. 
     As shown in  FIG. 6A , a distance t between the supporting member  30  and the movable member  20  can be appropriately set taking into account the range to be adjusted by the adjustment mechanism  40 . For example, in the case of a mask having a side length of about 600 mm, it is possible to make the distance t between them about 100 μm. The distance t only needs to be a distance sufficiently longer than the distance for adjusting the position of a passing hole formed as a mask pattern. 
     As shown in  FIG. 6A , the pulling bolt  41  includes a head  41   a . A screw hole along the X-axis direction is provided on the movable member  20 , and a through hole  32  is provided on the supporting member  30  in the X-axis direction. No thread is provided in the through hole  32 . The pulling bolt  41  is supported by the through hole  32 , and is inserted into the screw hole  22  of the movable member  20 . By tightening the pulling bolt  41  in a state where the head  41   a  of the pulling bolt  41  is brought into contact with the supporting member  30 , power of the pulling bolt  41  acts on the movable member  20  and the movable member  20  moves in the direction toward the supporting member  30 . 
     Accordingly, pulling tension force from the outer edge portion  553  to outside of the mask main body  55  is generated on the mask main body  55 . As a result, the position of the passing hole formed on the mask main body  55  is adjusted to move toward outside of the mask main body  55 . 
     As shown in  FIG. 6B , the pressing bolt  42  includes a head  42   a . A screw hole  33  along the X-axis direction is provided on the supporting member  30 , and the pressing bolt  42  is inserted into the screw hole  33  and is supported by the supporting member  30 . Then, a tip portion (end portion)  42   b  of the pressing bolt  42  is brought into contact with a side surface  24  of the movable member  20 . Specifically, the movable member  20  has a contact area  24   a  of the tip portion  42   b  of the pressing bolt  42 . 
     By tightening the pressing bolt  42  in a state where the tip portion of the pressing bolt  42  is brought into contact with the side surface  24  of the movable member  20 , power of the pressing bolt  42  acts on the movable member  20  and the movable member  20  moves in a direction away from the supporting member  30 . Accordingly, pressing force pressing from the outer edge portion  553  to inside (center) of the mask main body  55  is generated on the mask main body  55 . As a result, the position of the passing hole formed on the mask main body  55  is adjusted to move toward inside of the mask main body  55 . 
     It should be noted that in  FIGS. 6A  and B, instead of the head  41   a  of the pulling bolt  41  and the head  42   a  of the pressing bolt  42 , a nut may be screwed to (a screw portion of) a bolt. In this case, the rotational power of the nut is transmitted to the movable member  20  via the bolt. 
     Since the adjustment mechanism  40  can apply both tension force and pressing force to the mask main body  55  as described above, it is possible to fine-adjust the position of a mask pattern provided on the mask main body  55 , appropriately. 
       FIG. 7  is a cross-sectional view taken along the line D-D in  FIG. 2 . The mask adjustment unit  50  includes a Z adjustment mechanism  45  that adjusts the position of the base frame  10  in the Z-axis direction. The Z adjustment mechanism  45  includes two supporting members  301  along the X axis and a plurality of Z adjustment bolts  31  supported by these supporting members  301 . In this case, the supporting member  301  functions as an adjustment frame, and the Z adjustment bolt  31  functions as an adjustment member. As the Z adjustment bolt  31 , a bolt having a size from M2 to M5 is used. However, it is not limited thereto. 
     For example, a through hole  301   a  that passes through the supporting member  301  in the Z-axis direction is provided on the supporting member  301 . Screw holes  10   b  are provided at positions corresponding to the through holes  301   a  of the base frame  10 . Via the through hole  301   a  of the supporting member  301 , the Z adjustment bolt  31  is inserted into the screw hole  10   b . Moreover, fixing bolts  311  are attached to both end portions of the supporting member  301 . The fixing bolt  311  has a function to fix (both end portions of) the supporting member  301  and the base frame  10  to each other. 
     Between the supporting member  301  and the base frame  10 , a gap G is formed. Specifically, on the lower portion of the supporting member  301 , a tapered surface  301   b  formed so that the size of the gap G is increased from the end portions toward the center is provided. However, it is not limited to the tapered surface, and a concave surface including a curved surface (for example, a circular arc shape) and/or a flat surface only needs to be formed on the lower portion of the supporting member  301 . 
     In the case where a side length of the opening  10   a  of the base frame  10 , which has an almost square shape, is 900 mm, a maximum value h1 of the gap G formed by the tapered surface is about or larger than 2 mm (which is changed depending on the shape and material of the base frame  10 ). This is because the base frame  10  is considered to be deflected by about 2 mm. The maximum value h1 may be larger than 2 mm because the supporting member  301  itself may be deflected. The maximum value h1 of the gap G can be appropriately set by structural analysis or the like taking into account also a height h2. 
     In such a Z adjustment mechanism  45 , the base frame  10  is lifted in the Z-axis direction by tightening the Z adjustment bolt  31 . Accordingly, it is possible to adjust the position of the base frame  10  in the Z-axis direction with the height of the supporting member  301  as a reference. In particular, it is possible to correct the deflection of the base frame  10  in the Z-axis direction. Moreover, by providing the gap G, it is possible to cancel the deflection due to gravity because the gap G lifts the base frame  10  in a direction opposite to a gravity direction. As a result, it is possible to maintain the horizontal state of the base frame  10  and the substrate to be a processing target. 
     Moreover, because the supporting member  30  that performs pulling adjustment and pressing adjustment functions also as a frame for Z-axis adjustment, it is possible to reduce the size of the mask adjustment unit  50 . 
     As described above, according to the mask device  100  according to this embodiment, because the adjustment mechanism  40  can both tension force and pressing force to the mask main body  55 , it is possible to fine adjust the position of a mask pattern provided on the mask main body  55 , appropriately. 
     In general, the aperture ratio and the degree of precision of an organic EL display device have a trade-off relationship with each other. By using the mask device  100  according to this embodiment, the positional accuracy of an opening (passing hole) of a mask for deposition is improved, and it is possible to achieve a display device having a high aperture ratio and a high precision over the limit line of the trade-off. The aperture ratio is increased, i.e., it is possible to achieve an organic El display device having a high brightness and a longer useful life. 
     Moreover, because the mask device  100  according to this embodiment causes both tension force and pressing force, it is possible to maintain the position (or stress state) of the mask main body  55  after adjustment with the balance between the two stresses. Therefore, there is no need of a separate mechanism for maintaining the position of the mask main body  55  after adjustment. 
     In this embodiment, by tightening both the pulling bolt  41  and the pressing bolt  42  in the same tightening direction, it is possible to generate tension force and pressing force opposite to the tension force. Therefore, in the case where an operator performs an adjustment manually, the operation can be easily performed. 
     Moreover, in this embodiment, the Z adjustment mechanism  45  can prevent the base frame  10  from being deflected in the Z-axis direction. 
     According to this embodiment, it is possible to correct internal residual strain caused during electro-casting in a process of producing a mask or accuracy degradation depending on the degradation of positional accuracy for each process of photoetching. 
     Moreover, the positional accuracy of a mask pattern has been out of specification in a process of producing a mask in the past. The present technology can overcome this, and contribute to improvement of yield ratio in manufacturing. 
     Furthermore, even if the position of a mask pattern is displaced through a washing process or the like after the mask device  100  is used for a deposition process, as will be described later, it is possible to correct the displacement according to the present disclosure. Accordingly, it is possible to contribute to prolonging the lifetime of the mask device. 
     The mask device  100  according to this embodiment is used as a mask for deposition in a deposition apparatus that is not shown. Some deposition apparatuses include a conveyor using a roller transportation method, for example, and a plurality of deposition sources that are not shown are arranged along the Y-axis direction being a transportation direction thereof. A substrate to be a deposition processing target, which is not shown, is mounted on the mask device  100  according to the present technology, and a deposition process is applied to the substrate while two sides of the mask device  100  along the Y-axis direction are supported by a conveyor. 
     In the case where the mask device  100  according to this embodiment is used as such a deposition apparatus, in recent years in which the mask device  100  is increased in size, the base frame  10  is deflected as shown in  FIG. 8  if no countermeasure is taken. This is because the conveyor of the deposition apparatus supports only two sides of the base frame  10  along the Y-axis direction as described above. 
     As mentioned above, in the case where the base frame  10  has a predetermined large size, the maximum amount of the deflection is about 2 mm. According to the mask device  100  according to this embodiment, the Z adjustment mechanism  45  can truly suppress the deflection of the base frame  10 , as described above. 
     The mask for deposition described in Patent Document 1 cannot suppress such deflection in the Z-axis direction. In addition, as described above, the technique of Patent Document 1 only applies, to the mask main body  55 , tension force from the mask main body  55  to outside, and it is difficult to fine adjust a pattern. 
     Japanese Patent Application Laid-open No. 2006-310183 proposes a method of correcting deflection in a gravity direction by using a metal tape to which tension force is applied. In this case, it is possible to make a frame follow the metal tape. However, it is difficult to perform a fine adjustment of μm order in a gravity direction or to deform the frame in a direction opposite to a gravity direction, unlike the present technology. Moreover, because partial warpage is caused in a frame in some cases due to an influence of warpage or residual stress caused during processing, it is possible to suppress deflection. 
     Moreover, as an apparatus that corrects warpage in a frame, a tension applying apparatus described in Japanese Patent Application Laid-open No. 2007-257839 is disclosed. In this apparatus, because the position at which a metal tape is attached is limited to a frame rear surface (surface opposite to a mask surface), it is difficult to reproduce the supporting state during actual deposition, and to adjust to the frame warpage state suited to the state during actual deposition. 
     According to the mask device  100  according to this embodiment, it is possible to solve the above-mentioned problem. 
     (Position Holding Mechanism that Holds Position after Position Adjustment) 
     In the above description, there is no need of a mechanism that holds the position of the mask main body  55  after the position of a mask pattern is adjusted by balance of stress due to tension force and pressing force. However, as will be described below, the mask adjustment unit may include a holding mechanism that holds the position of the mask main body  55  after the position of the mask pattern is adjusted.  FIGS. 9A  to C and  FIG. 10  are each a cross-sectional view showing an example of the position holding mechanism. 
     In the example shown in  FIG. 9A , a nut  43  is tightened on the pressing bolt  42 , for example. Also on the pulling bolt  41  that is not shown, a nut is tightened similarly. 
     In the example shown in  FIG. 9B , the pressing bolt  42  is fixed from a side of the upper surface of the supporting member  30  with a locking screw  35 . Although not shown, the puling bolt  41  is fixed with a locking screw similarly. 
     In the example shown in  FIG. 9C , a fixing bolt  25  is inserted into an insertion hole  20   b  from a side of the upper surface of the movable member  20 , and is attached to a screw hole  10   c  of a base frame. Thus, the base frame  10  and the movable member  20  are fixed to each other. The size of the insertion hole  20   b  is such a size that the screw hole  10   c  is not covered by the movable member  20  even if the movable member  20  moves in the horizontal direction in the figure to adjust the position of a mask pattern. 
     By providing such a position holding mechanism, it is possible to reliably hold the position of the mask main body  55  after the position of the mask pattern is adjusted. 
     It should be noted that R processing or step processing may be performed on the edge of the movable member  20  to prevent the movable member  20  from getting stuck with the base frame  10  when the movable member  20  is moved. Processing for reducing friction resistance is performed on at least a portion in which a moving member is in sliding contact with the base frame  10  when the movable member  20  is moved. Therefore, it is possible to easily move the movable member  20 . 
     Second Embodiment 
       FIG. 10  is a cross-sectional view showing a part of a mask adjustment unit according to a second embodiment of the present technology, i.e., an adjustment mechanism. In the following description, the members, the functions, and the like similar to those of the adjustment mechanism  40  according to the embodiment shown in  FIGS. 6A  and B or the like are simplified or omitted, and different points are mainly shown. 
     The adjustment mechanism according to this embodiment includes a piezoelectric element  60  provided between a supporting member  80  and a movable member  70  provided on the base frame  10 . One piezoelectric element  60  can pull and press the movable member  70 . Accordingly, tension force and pressing force is applied to the mask main body  55 , and the position of the mask pattern is fine adjusted. The adjustment mechanism only needs to include a plurality of piezoelectric elements  60 , and the piezoelectric elements  60  are provided in the X-axis direction and also in the Y-axis direction. 
     Even in the case where the piezoelectric element  60  is used as described above, it is possible to achieve device force equivalent to M2 to M5, for example. Therefore, it is possible to achieve a desired movement distance of the movable member  70 . 
       FIG. 11  shows the position holding mechanism that holds the position of the mask main body  55  after the position is adjusted by the adjustment mechanism shown in  FIG. 10 . The holding mechanism is the same as the position holding mechanism shown in  FIG. 9C , a fixing bolt  75  is attached from a side of the upper surface of the movable member  70 , and the movable member  70  is fixed. As shown in  FIG. 10 , the piezoelectric element  60  returns to the original state after electric power supply to the piezoelectric element  60  is terminated. Therefore, before the termination of electric power supply, it needs to hold the position with a fixing bolt, as shown in  FIG. 11 , for example. 
     Third Embodiment 
       FIG. 12  is a cross-sectional view of an adjustment mechanism of a mask adjustment unit according to a third embodiment of the present technology viewed in the Z-axis direction. 
     The adjustment mechanism according to this embodiment includes a cam member  47  provided between the movable member  20  and the supporting member  30 . The cam member  47  has a connection portion  471  to which a screw portion of a pressing bolt  46  is connected and an operation portion  472  that is brought into contact with the movable member  20  and applies pressing force. The operation portion  472  has an elliptical plate shape or a shape similar thereto, but may have a shape other than those. A screw hole is formed on the connection portion  471 , and a screw portion of the pressing bolt  46  is screwed into the screw hole. The pressing bolt  46  is connected to the cam member  47  through the through hole  32  provided on the supporting member  30 . 
     The mechanical relationship between a pulling bolt  45 , the supporting member  30 , and the movable member  20  is the same as that between the pulling bolt  45 , the supporting member  30 , and the movable member  20  according to the first embodiment. 
     When the pressing bolt  46  is tightened, the cam member  47  rotates clockwise in the figure around the connection portion  471  side with the Z-axis direction being a rotation axis. That is, it rotates so that the connection portion  471  side of the cam member  47  approaches the side of the head of the pressing bolt  46  and the operation portion  472  side presses the movable member  20 . 
     As described above, the adjustment mechanism includes the cam member  47  that converts power of the pressing bolt  46  in a moving direction (a first moving direction) along the X-axis direction when the pressing bolt  46  operates into power in a moving direction different from the direction (a second moving direction), i.e., power in a rotation direction here, and transmits it to the movable member  20 . In this case, the cam member  47  functions as a conversion member. 
     Also according to this embodiment, it is possible to generate tension force and pressing force opposite thereto by tightening both bolts in the same tightening direction. Therefore, in the case where an operator manually performs adjustment, the operation can be easily performed. In addition, because the heads of the bolts  45  and  46  are in the state of pressing the supporting member  30 , it is possible to suppress the deflection of the bolts  45  and  46  by providing a spring washer, for example, even if disturbance such as vibration and a temperature change is caused. 
     It should be noted that a conversion member may be connected to the pulling bolt  45 , and the conversion unit may pull the movable member  20  from the outer edge portion  553  of the mask main body  55  to an outside direction of the mask main body  55 . 
     Fourth Embodiment 
       FIG. 13A  is a plan view an adjustment mechanism of a mask adjustment unit according to a fourth embodiment of the present technology.  FIG. 13B  is a cross-sectional view taken along the line E-E in  FIG. 13A . 
     The adjustment mechanism according to this embodiment includes an elastic body  49  as a transmitting member arranged between the supporting member  30  and the movable member  20  provided on the base frame  10 . The supporting member  30  functions as a fixed body fixed to the base frame  10 . The elastic body  49  is a member having a pipe shape. A pressing bolt  48  is attached to the elastic body  49  and the base frame  10  in the Z-axis direction, and the elastic body  49  and the base frame  10  are connected to each other. 
     The elastic body  49  is formed to be long in the Y-axis direction, for example. The elastic body  49  may have the similar length to one side length of the mask adjustment unit or the mask main body  55 . A plurality of elastic bodies  49  may be provided at a predetermined pitch along one side thereof. 
     The pulling bolt  45  is screwed into the movable member  20  through the through hole  32  provided on the supporting member  30  and a side through hole provided on the elastic body  49 . 
     By tightening the bolt  48 , a head  48   a  of the bolt  48  approaches the base frame  10 . As a result, the elastic body  49  is pressed and is deformed to extend in the X-axis direction. Accordingly, the movable member  20  is pressed inwardly, and stress is inwardly applied to the mask main body  55  from the outer edge portion  553 . 
     According to this embodiment, because the deformation amount due to elastic deformation is small with respect to the moving distance of the bolt  48  in the Z-axis direction, it is possible to fine adjust the position of a mask pattern with high accuracy. 
     As the elastic body  49 , not only a member having a pipe shape, i.e., a hollow member but also solid member may be used. In  FIG. 13 , the outer shape of the elastic body  49  viewed in the Y-axis direction may be not a circular shape but an elliptical shape or polygon. 
     Also on the inside of the movable member  20  viewed in the Y-axis direction (the side opposite to the supporting member  30  of outside based on the movable member  20 ), a supporting member may be provided. Then, the elastic body  49  is arranged between the supporting member  30  and the movable member  20  on the outside, and a second elastic body that is not shown is arranged between the supporting member and the movable member  20  on the inside. The elastic body  49  on the outside is connected to the base frame  10  with the bolt  48 . The second elastic body is connected to the base frame  10  with a pulling bolt that is not shown. According to such a configuration of the adjustment mechanism, it is possible to generate both tension force and pressing force using the elastic body  49  and the second elastic body. 
     Alternatively, no supporting member  30  is provided on the outside of the movable member  20 , and an elastic body may be provided between the movable member  20  and a supporting member provided on the inside. In this case, the elastic body generates tension force on the mask main body  55 , and the pressing bolt  42  shown in  FIG. 6B  generates pressing force to the mask main body  55 . 
     Fifth Embodiment 
       FIG. 14  is a plan view showing an adjustment mechanism of a mask adjustment unit according to a fifth embodiment of the present technology.  FIG. 15A  is a cross-sectional view taken along the line F-F in  FIG. 14 .  FIG. 15B  is a cross-sectional view taken along the line G-G in  FIG. 14 . 
     The adjustment mechanism according to this embodiment includes a fixed body  130  provided on the base frame  10 , a movable member  120  that faces the fixed body  130 , a block member  90  as a transmitting member provided between the fixed body  130  and the movable member  120 , a pressing bolt  62 , and a pulling bolt  61 . 
     The fixed body  130  has a tapered surface  131  that faces the movable member  120 . Also the movable member  120  has a tapered surface  121  that faces the tapered surface  131  of the fixed body  130 . The movable member  120  and the fixed body  130  are formed so that the interval between the tapered surfaces  121  and  131  is changed toward the Z-axis direction, i.e., expands toward the upper side of the vertical direction, here. The block member  90  is arranged between the tapered surfaces  121  and  131  so that the block member  90  is in contact with the tapered surfaces  121  and  131 . Specifically, also both side surfaces of the block member  90  are tapered surfaces. 
     As shown in  FIG. 15A , the pressing bolt  62  is connected to the base frame  10  through a vertical through hole  92  provided on the block member  90  from the upper surface side of the block member  90 , for example. As shown in  FIG. 15B , the pulling bolt  61  is connected to the movable member  120  through a through hole  132  and a vertical through hole  94  provided on the block member  90  from the outside surface of the fixed body  130 . 
     The inner diameter of the vertical through hole  92  and the through hole  94  is formed to be sufficiently larger than the diameter of the screw portion of the pressing bolt  62  and the pulling bolt  61 . The inner diameter is designed taking into account the range in which the block member  90  is moved in horizontal and vertical directions by the tightening action of the bolts  61  and  62 . 
     For example, by tightening the pressing bolt  62 , the block member  90  is moved downward along the Z-axis direction. Accordingly, the movable member  120  is separated from the fixed body  130 , and inward pressing force is applied to the mask main body  55 . 
     The tapered surfaces  121  and  131  of the movable member  120  and the fixed body  130  may be not a flat surface but a curved surface. 
     It should be noted that in  FIG. 15B , by making the shown angle of the tapered surface close to horizontal, it is possible to reduce the force tightening the pulling bolt  61  for applying tension to the mask main body  55 . 
     In this embodiment, it does not necessarily need to provide the pressing bolt  62  and the pulling bolt  61 . In this case, it only needs to move the block member  90  vertically and horizontally with a jig that is not shown. In order to move the block member  90  in the upper direction, the jig needs to press the block member through an operation opening (not shown) provided on the base frame  10  as shown in  FIG. 15B , for example. 
     Sixth Embodiment 
       FIG. 16  is a cross-sectional view of an adjustment mechanism of a mask adjustment unit according to a sixth embodiment of the present technology viewed in the Z-axis direction. 
     The adjustment mechanism according to this embodiment includes a bolt  63  for performing pressing and pulling and a regulation member (regulation portion)  110  that regulates the movement of the bolt  63  with respect to the supporting member  30  along the direction of mounting and removing the bolt  63 , i.e., X-axis direction. The regulation member  110  is fixed to a side surface  30   d  of the supporting member  30  with another bolt  111  or the like. 
     The bolt  63  is screwed into the movable member  20  through the through hole  32  of the supporting member  30  in the state where a head  63   a  is brought into contact with the side surface  30   d  of the supporting member  30 . The regulation member  110  has a space  110   b  that covers the head  63   a  of the bolt  63 , and the space  110   b  is communicated with the outside of the regulation member  110  through an operating hole  110   c . An operating member  64  such as a wrench is inserted into the operating hole  110   c , and the operating member  64  can be connected to the head  63   a  of the bolt  63 . 
     By tightening the bolt  63  through the operating member  64 , the movable member  20  approaches the supporting member  30 , thereby generating tension force on the mask main body. By loosening the bolt  63  through the operating member  64 , the movable member  20  is separated from the supporting member  30 , and the tension force on the mask main body is weakened. 
     As described above, in this embodiment, it is possible to perform pressing and pulling with one bolt  63 . 
     Seventh Embodiment 
       FIG. 17  is a cross-sectional view of an adjustment mechanism of a mask adjustment unit according to a seventh embodiment of the present technology viewed in the Y-axis direction. 
     The adjustment mechanism according to this embodiment includes a bolt  66  for performing pressing and pulling and a color  67  as a regulation portion that regulates the movement of the bolt  66  with respect to the supporting member  30  in the X-axis direction. The bolt  66  is inserted into the through hole  32  of the supporting member  30 . A head  66   a  of the bolt  66  is brought into contact with the outside surface of the supporting member  30 , and the color  67  is screwed into the bolt  66 , is brought into contact with the inside surface of the supporting member  30 , and is fixed. 
     Moreover, the adjustment mechanism includes two nuts  68  and  69  fixed in a vertical hole  170   a  of a movable member  170 , and the bolt  66  is screwed into the nuts  68  and  69 . The nuts  68  and  69  can prevent displacement and backlash due to external force from occurring. 
     Eighth Embodiment 
       FIG. 18A  is a plan view showing an adjustment mechanism of a mask adjustment unit according to an eighth embodiment of the present technology.  FIG. 18B  is a cross-sectional view taken along the line H-H in  FIG. 18A . 
     The adjustment mechanism according to this embodiment includes cam members  19  and  29  (first cam member and second cam member) provided on the inside and outside of a movable member  220 . The cam member  19  ( 29 ) includes a cam head  191  ( 291 ) that is brought into contact with both side surfaces of the movable member  220  and an eccentric axis  194  ( 294 ) that is eccentrically provided on the cam head  191  ( 291 ). The eccentric axis  194  ( 294 ) is rotatably connected to the base frame  10  with a bearing  192  ( 292 ). 
     The cam member  19  for pressing is arranged on the outside of the movable member  220 , and the cam member  29  for pulling is arranged on the inside of the movable member  220 . In addition, the cam member  19  for pressing and the cam member  29  for pulling are arranged alternately in the Y-axis direction, for example. 
     On the upper surface of the cam head  191  ( 291 ), a handle  193  ( 293 ) for operation is provided. The cam member  19  ( 29 ) rotates via the handle  193  ( 293 ) with the eccentric axis  194  ( 294 ) being a rotational axis. Accordingly, it is possible to apply tension force and pressing force to the mask main body  55  fixed to the movable member  220 . 
     Also to the mask adjustment units according to the third to eighth embodiments described above, any one of the above-mentioned position holding mechanisms (see  FIGS. 9A  to C) may be applied. 
     Ninth Embodiment 
       FIG. 19A  is a plan view showing an adjustment mechanism of a mask adjustment unit according to a ninth embodiment of the present technology.  FIG. 19B  is a cross-sectional view taken along the line I-I in FIG.  19 A. 
     A movable member  270  of the adjustment mechanism according to this embodiment includes a trench  272  along the Y-axis direction. Piezoelectric elements  161  and  162  are connected to both inside surface and outside surface of a wall portion  274  formed by the trench  272 . 
     The piezoelectric element  162  that presses the outside surface of the wall portion  274  applies inward pressing force to the mask main body  55 . The piezoelectric element  161  that presses the inside surface of the wall portion  274  applies outward tension force to the mask main body  55 . 
     In this embodiment, a holder  163  that holds each of the piezoelectric elements  161  and  162  is provided. The holder  163  is connected to a stage  166  that is movable in the X-axis direction, for example. The stage  166  is driven by a driving mechanism  167  using a stepping motor or the like as a driving source. With the driving of the stage  166 , it is possible to coarse adjust the position of the mask pattern of the mask main body  55  via the holder  163  and the movable member  270 . 
     The stage  166  for coarse adjustment and the driving mechanism  167  do not necessarily need to be provided. 
     It should be noted that on the movable member  270  and the base frame  10 , a screw hole  273  to which the fixing bolt  75  is attached as a mechanism for holding the position of the mask main body  55  after adjustment (position holding mechanism) is formed. 
     [Embodiment of Mask Producing Apparatus] 
     An operator may manually adjust the position of a mask pattern using the mask adjustment unit according to each embodiment, and a mask producing apparatus may automatically adjust the position as will be described later. 
     [Example 1 of Mask Producing Apparatus] 
       FIG. 20  is a diagram showing a mask producing apparatus according to an embodiment. In this embodiment, an example in which the mask device  100  according to the first embodiment is adjusted (produced) will be described. 
     A mask producing apparatus  400  includes a supporting base  401 , a base frame supporting portion  404  provided on the supporting base  401 , and an operating device  450  that is provided on the outside of the base frame supporting portion  404  and operates the adjustment mechanism  40 . In addition, the mask producing apparatus  400  includes a motor driver  405  that drives the operating device  450 , a camera  420  provided on the upper portion, and a controller  410 . 
     A plurality of operating devices  450  are arranged along the direction of four sides of the supporting base  401  having a rectangular shape. Moreover, on the supporting base  401 , a guide mechanism  403  that allows the position of the operating device  450  to be changed is provided. The guide mechanism  403  includes a guide rail. The guide rail allows the position of the operating device  450  to be changed along each side, and the operating device  450  can be fixed at a predetermined position with a bolt or the like. 
       FIG. 21  is a perspective view showing one operating device  450 . The operating device  450  includes a motor  451  provided with a reducer (e.g., reducing gear), and a wrench adaptor  452  attached to an output axis of the motor  451 . The end portion of the wrench adopter  452  can be connected to the pulling bolt  41  and the pressing bolt  42  of the adjustment mechanism  40 , as shown in  FIG. 22 , for example. For example, a concave portion that is not shown is provided on the end portion of the wrench adopter  452 , and the heads  41   a  and  42   a  of the pulling bolt  41  and the pressing bolt  42  (see  FIGs. 6A  and B) fit into the concave portion of the end portion of the wrench adopter  452 . Thus, the operating device  450  is connected to the adjustment mechanism  40  (See  FIG. 1 ). 
     As the motor  451 , a stepping motor or a servomotor is used, for example. A reducing gear is often mounted on a commonly-used stepping motor. 
     The reduction ratio by a reducer is set to, for example, about 1/60 to 1/40, typically, 1/50. In the case where an M3 bolt is used for the operating device  450  with a reduction ratio of 1/50, it is possible to achieve a driving amount of 10 μm/revolution. Accordingly, it is possible to easily perform a positional adjustment of μm order. 
     It should be noted that the motor  451  is provided with also a handle  453 . An operator can manually rotate the handle  453 , and thus, the operating device  450  drives the adjustment mechanism  40 . 
     The camera  420  detects the location information (actual location information) of a mask pattern by taking an image of the pattern surface  551  of the mask main body  55  particularly, of the mask device  100  supported by the supporting base  401  (see  FIG. 22 ). The camera  420  may move in the X or Y axis. 
     The controller  410  stores at least designing location information being location information of a mask pattern of designing information of the mask main body  55  stored in advance, for example. Moreover, the controller  410  acquires the actual location information of a mask pattern detected by the camera  420 , and performs predetermined calculation to be described later based on the actual location information and the above-mentioned designing location information. 
     The controller  410  may typically include a computer such as CPU, RAM, and ROM. The designing location information of a mask pattern may be stored in another storage device connected to the controller  410  by wire or wireless. 
     At least one operating device  450  may be provided on only one side of the supporting base  401 , for example, and may be provided on each of at least two sides. The number and arrangement of the operating device  450  can be appropriately set depending on the shape of a mask pattern or a position in the pattern surface  551  to be corrected. 
     The operation of the mask producing apparatus  400  will be described. 
     First, as shown in  FIG. 22 , an operator places the mask device  100  shown in  FIGS. 1 and 2 , for example, on the base frame supporting portion  404 , and fixes it with a fixture or the like that is not shown. Then, the operator sets the position of each operating device  450  on the guide mechanism  403 , and positions each operating device  450 . In addition, the operator connects the wrench adopter  452  of the operating device  450  to the pulling bolt  41  and the pressing bolt  42  of the adjustment mechanism  40 . 
     As the mask device  100  placed on the mask producing apparatus  400 , the mask main body  55  bonded to the mask adjustment unit  50  by welding is used. In addition, the mask device  100  that is used by a deposition apparatus actually before being applied with a washing process may be used. 
     The controller  410  acquires the actual location information of a mask pattern by taking an image of the entire pattern surface  551  of the mask main body  55  with the camera  420 . The actual location information is information obtained by binarizing information of the taken image of the mask pattern by an image process. 
     The controller  410  acquires the designing location information of the mask main body  55  from a memory, and calculates the displacement amount of the actual location information from the designing location information based on the acquired designing information and the obtained actual location information that is detected by the camera  420 . For example, the controller  410  calculates the displacement amount by calculating the difference between information on coordinate of a passing hole as the designing location information and information on actual coordinate of the passing hole as the actual location information. 
     The controller  410  transmits, to the motor driver  405 , a control signal that corrects the calculated displacement amount, i.e., control signal for making the calculated displacement amount close to zero. The motor driver  405  drives the operating device  450  based on the control signal. Accordingly, it is possible to automatically make the position of a mask pattern close to the position on designing. 
     The controller  410  may store the correlation between the displacement amount and a value of a drive signal by the motor driver  405  in a memory or the like using a look-up table. The look-up table may be stored for each mask pattern, and for each material of the mask main body  55 . 
     Examples of a method of creating a look-up table include the following method. A torque is generated by the operating device  450 , and the transmission of the torque to the pulling bolt  41  and the pressing bolt  42  is started. The positions of the movable member  20  (see, for example,  FIG. 1 ) and a mask pattern are not moved until rattling of rotation by the operating device  450  is eliminated. In this case, the controller  410  or the operating device  450  only needs to have a function to detect the torque. This is because it is possible to detect the point where the rattling is eliminated with a torque value, and to set the point to a zero point (reference point) at the time of adjustment. With this function, it is possible to achieve the correlation between the displacement amount and a drive signal to be output. 
     Alternatively, the controller  410  may use a predetermined algorithm to calculate a value of a control signal to be output, based on the calculated displacement amount. 
     In the case where the mask device  100  includes the above-mentioned position holding mechanism (see, for example,  FIGS. 9A  to C), an operator holds the position of a mask pattern after adjustment by the position holding mechanism after the automatic positional adjustment is performed by the mask producing apparatus  400  as described above. 
     According to the mask producing apparatus  400  according to this embodiment, it is possible to automatically adjust the position of a mask pattern of the mask main body  55 , appropriately. Therefore, it is possible to increase the productivity of a display device produced by the mask device  100 . 
     (Example 2 of a Mask Producing Apparatus) 
       FIG. 23  is a perspective view showing a mask producing apparatus according to another example. The difference between a mask producing apparatus  600  and the mask producing apparatus  400  shown in  FIG. 20  is that the mask producing apparatus  600  includes a Z operating device  650 . The Z operating device  650  operates the Z adjustment bolt  31  (see  FIG. 7 ) by the Z adjustment mechanism  45  of the mask device  100 . The Z operating device  650  includes the similar mechanism (motor  451  with a reducer) to the above-mentioned operating device  450 . 
     A plurality of Z operating devices  650  are provided. The plurality of Z operating devices  650  are slidably and fixably connected to (e.g., two) beams provided on the supporting base  401  along the X-axis direction, for example, by the above-mentioned guide mechanism  403 . 
     Moreover, a dial gage that is not shown is attached to each beam. The dial gage measures the deflection amount by measuring height positions of two sides of the base frame  10  of the mask device  100  in the X-axis direction. The device that measures the deflection amount is not limited to a dial gage, and a photosensor may be used, for example. 
     For example, the controller  410  can calculate the deflection amount by storing the distance between the dial gage to a side of the base frame  10  in advance when the side of the base frame  10  along the X-axis direction is in a horizontal state and comparing the stored information with the distance actually measured. 
     It should be noted that on the supporting bases  401  and  601 , no member that supports two sides of the base frame  10  in the X-axis direction is provided. Therefore, when the base frame  10  is supported on the supporting bases  401  and  601 , deflection is caused by the weight of the mask device  100 . That is, as shown in  FIG. 20 , the base frame supporting portion  404  of the supporting base  401  is provided only along the Y-axis direction. That is, the mask producing apparatuses  400  and  600  are each an apparatus assuming that a conveyor supports only a side of the base frame  10  along the Y-axis direction in the above-mentioned deposition apparatus. 
     The controller  410  (see  FIG. 20 ) acquires the deflection amount detected by the dial gage. Then, the controller  410  transmits a control signal to a motor driver that drives the Z operating device  650 , which is not shown, so that the deflection amount is corrected (the deflection amount is made to be close to zero). The motor driver drives the Z operating device  650  according to the control signal, and tightens the Z adjustment bolt  31 . 
     The controller  410  only needs to store the correspondence between the deflection amount and a value of a control signal to be output in a memory or the like using a look-up table. The look-up table may be stored for each mask pattern, and for each material of the mask main body  55 . 
     Alternatively, the controller  410  may calculate the value of a control signal to be output using a predetermined algorithm based on the calculated deflection amount. 
     The method of adjusting tension force and pressing force by the mask producing apparatus  600  is the same as the method by the mask producing apparatus  600 . 
     According to the mask producing apparatus  600  according to this embodiment, it is possible to automatically adjust not only the position of a mask pattern of the mask main body  55  but also deflection of the base frame  10  of the mask device  100 . 
     As another example of the mask producing apparatuses  400  and  600 , in the case where the mask adjustment unit  50  includes the piezoelectric element  60  (see, for example,  FIG. 10 ), there is no need of the operating device  450  and a wiring connected to the piezoelectric element  60  is provided. Accordingly, it is possible to achieve the miniaturization and simplification of the mask producing apparatuses  400  and  600 . 
     Other Embodiments 
     The present technology is not limited to the above-mentioned embodiments, and can achieve other various embodiments. 
     The mask according to the present technology is used in a process of producing a display device using an organic EL device, and an example in which the mask is used in a process of depositing an organic material has been described. However, the mask according to the present technology may be applied to a deposition process of not only an organic material but also a meal material, a dielectric material, or the like. Alternatively, the mask may be used as not only a mask for deposition but also a mask for exposure, a mask for printing, or the like. 
     Moreover, the display device is not limited to an organic EL device, and may be a liquid crystal display device. The device being a producing target by a mask is not limited to a display device. 
     In the first embodiment, one pulling bolt  41  and one pressing bolt  42  are alternately arranged. However, a plurality of pulling bolts may be continuously arranged, or a plurality of pressing bolts  42  may be continuously arranged. 
     In the first embodiment, four movable members  20  are provided corresponding to the four sides of the base frame  10  having a rectangular frame shape. However, at least one movable member  20  may be provided corresponding to at least one side. For example, two movable members  20  may be provided on two opposing sides. The same shall apply to the second to ninth embodiments. 
     In the above-mentioned embodiments, as shown in  FIG. 7 , the tapered surface  301   b  has been provided on the lower surface of the supporting member  301  that functions as an adjustment frame. However, the lower surface of the supporting member  301  may be a flat surface, and such a concave surface may be formed on a surface of the base frame  10 , which faces the supporting member  301 , i.e., the upper surface of the base frame  10 . Alternatively, a concave surface may be provided on the supporting member  30  and the base frame  10 . 
     For example, as shown in  FIGS. 1 and 2 , the pulling bolt  41  and the pressing bolt  42  have been provided on the supporting member  301  along the X-axis direction. However, it does not necessarily need to provide the pulling bolt  41  and the pressing bolt  42  on the supporting member  301 , and only equipment for adjusting the Z-axis may be provided. 
     Alternatively, in addition to the supporting member  301 , an adjustment frame for adjusting the Z-axis may be separately provided on the base frame  10 . Moreover, the adjustment frame for adjusting the Z-axis may be provided on all four sides of the base frame  10 . 
     In the above-mentioned embodiments, a bolt (fixing bolt) is used as a main element of a position holding mechanism. In addition to the bolt, a clamping mechanism, a piezoelectric element, or another mechanism may be used. 
     The arrangement of the base frame supporting portion  404  provided on the supporting base  401  of the mask producing apparatus  400  according to each embodiment can be changed appropriately depending on designing of a processing apparatus (e.g., the above-mentioned deposition apparatus) that processes a substrate using the mask device  100 . The same shall apply also to the mask producing apparatus  600 . 
     The above-mentioned mask producing apparatus may be mounted on a deposition apparatus, or connected to a deposition apparatus in line. Accordingly, a process for producing a mask device by a mask producing apparatus and a deposition process by a deposition apparatus are automatically performed. Accordingly, it is possible to perform these processes without manual operation. In this case, a process for producing a mask device may be performed under vacuum. 
     At least two feature portions of the embodiments described above can be combined. 
     It should be noted that the present technology may also take the following structures. 
     (1) A mask adjustment unit, including: 
     a base body; 
     a movable member that supports a side of an outer edge portion of a mask main body and is movably provided on the base body, the mask main body having the outer edge portion; and 
     an adjustment mechanism that applies, to the mask body via the movable member, both pulling tension force from the outer edge portion of the mask main body to outside of the mask main body and pressing force pressing from the outer edge portion to inside of the mask main body, the mask body being supported by the movable member. 
     (2) The mask adjustment unit according to (1), in which 
     the adjustment mechanism includes at least one bolt that acts on the movable member. 
     (3) The mask adjustment unit according to (2), in which 
     the adjustment mechanism includes
         a first bolt that applies the tension force to the mask main body, and   a second bolt that applies the pressing force to the mask main body.
 
(4) The mask adjustment unit according to (3), in which
       

     the adjustment mechanism has a supporting portion that supports the first bolt and the second bolt, the supporting portion being provided on the base body, and 
     the movable member has a screw hole into which the first bolt is inserted and a contact area with which an end portion of the second bolt is brought into contact. 
     (5) The mask adjustment unit according to (3), in which 
     the adjustment mechanism further includes a conversion member that is connected to at least one of the first bolt and the second bolt, converts power of the at least one bolt in a first moving direction into power in a second moving direction, and transmits the converted power to the movable member, the second moving direction being different from the first moving direction. 
     (6) The mask adjustment unit according to (3), in which 
     the adjustment mechanism further includes
         a fixed body provided on the base body, and   a transmitting member that is connected to the base body with any one of the first bolt and the second bolt between the fixed body and the movable member, converts power of any one of the first bolt and the second bolt in a first moving direction into power in a second moving direction, and transmits the converted power to the movable member, the second moving direction being different from the first moving direction.
 
(7) The mask adjustment unit according to claim  6 ), in which
       

     the transmitting member is an elastic body that acts on the movable member by an elastic deformation. 
     (8) The mask adjustment unit according to (6), in which 
     the movable member has a tapered surface, 
     the fixed body has a tapered surface facing the tapered surface of the movable member and is provided on the base body so that interval between the tapered surface of the movable member and the tapered surface of the fixed body changes toward a vertical direction of a pattern surface on which a mask pattern is formed, the mask main body having the pattern surface, and 
     the transmitting member is a block member arranged between the tapered surface of the movable member and the tapered surface of the fixed body so that the block member is brought into contact with the tapered surfaces. 
     (9) The mask adjustment unit according to (2), in which 
     the adjustment mechanism further has
         a supporting portion provided on the base body, which supports the bolt, and   a regulation portion that regulates movement of the bolt along an inserting and removing direction of the bolt with respect to the supporting portion.
 
(10) The mask adjustment unit according to (1), in which
       

     the adjustment mechanism includes
         a first cam member that applies the tension force to the mask main body, and   a second cam member that applies the pressing force to the mask main body.
 
(11) The mask adjustment unit according to (1), in which
       

     the adjustment mechanism includes a piezoelectric element capable of applying the tension force and the pressing force to the mask main body. 
     (12) The mask adjustment unit according to any one of (1) to (11), further including: 
     an adjustment frame connected to the base body so that the adjustment frame faces the base body in a direction vertical to a pattern surface on which a mask pattern is formed and a gap is formed between the adjustment frame and the base body, the mask main body having the pattern surface; and 
     an adjustment member that adjusts a distance of the gap in the vertical direction. 
     (13) A mask device, including: 
     a mask main body having an outer edge portion; 
     a base body; 
     a movable member that supports a side of the outer edge portion of the mask main body and is movably provided on the base body; and 
     an adjustment mechanism that applies, to the mask body via the movable member, both pulling tension force from the outer edge portion of the mask main body to outside of the mask main body and pressing force pressing from the outer edge portion to inside of the mask main body, the mask body being supported by the movable member. 
     (14) A mask producing apparatus for producing a mask device by adjusting a position of a mask pattern of a mask main body having an outer edge portion, a pattern surface, and the mask pattern formed on the pattern surface, the mask producing apparatus including: 
     a detection unit that detects actual location information being location information on the mask pattern in the pattern surface in a state where the mask main body of the mask device is supported by a movable member, the mask device including
         the mask main body,   a base body,   the movable member that supports a side of the outer edge portion of the mask main body and is movably provided on the base body, and   an adjustment mechanism that applies, to the mask body via the movable member, both pulling tension force from the outer edge portion of the mask main body to outside of the mask main body and pressing force pressing from the outer edge portion to inside of the mask main body, the mask body being supported by the movable member;       

     an operating device that drives the adjustment mechanism of the mask device; and 
     a controller that acquires designing location information being location information of the mask pattern out of designing information of the mask main body, calculates an amount of displacement of the actual location information from the designing location information based on the acquired designing location information and the detected actual location information, and controls the operating device based on the calculated displacement amount. 
     (15) The mask producing apparatus according to (14), in which 
     the operating device includes
         a motor, and   a reducer that reduces drive of the motor.
 
(16) The mask producing apparatus according to (14) or (15), further including
       

     a guide mechanism that allows the operating device to move along the mask main body. 
     (17) A mask producing method for producing a mask device by adjusting a position of a mask pattern of a mask main body having an outer edge portion, a pattern surface, and the mask pattern formed on the pattern surface, the mask producing method including: 
     detecting actual location information being location information of the mask pattern in the pattern surface in a state where the mask main body of the mask device is supported by a movable member, the mask device including
         the mask main body,   a base body,   the movable member that supports a side of the outer edge portion of the mask main body and is movably provided on the base body, and   an adjustment mechanism that applies, to the mask body via the movable member, both pulling tension force from the outer edge portion of the mask main body to outside of the mask main body and pressing force pressing from the outer edge portion to inside of the mask main body, the mask body being supported by the movable member;       

     acquiring designing location information being location information of the mask pattern out of designing information of the mask main body; 
     calculating an amount of displacement of the actual location information from the designing location information based on the acquired designing location information and the detected actual location information; and 
     controlling an operating device that drives the adjustment mechanism of the mask based on the calculated displacement amount. 
     DESCRIPTION OF REFERENCE SYMBOLS 
     
         
           10  base frame 
           19 ,  29  cam member 
           20 ,  70 ,  120 ,  170 ,  220 ,  270  movable member 
           21  fixing bolt 
           24   a  contact area 
           30 ,  80 ,  301  supporting member 
           40  adjustment mechanism 
           41 ,  61  pulling bolt 
           42 ,  62  pressing bolt 
           45  Z adjustment mechanism 
           46 ,  48 ,  63 ,  66  bolt 
           49  elastic body 
           50  mask adjustment unit 
           55  mask main body 
           60 ,  161 ,  162  piezoelectric element 
           90  block member 
           100  mask device 
           110  regulation member 
           121 ,  131  tapered surface 
           130  fixed body 
           301  supporting member 
           400 ,  600  mask producing apparatus 
           403  guide mechanism 
           410  controller 
           420  camera 
           450  operating device 
           551  pattern surface 
           553  outer edge portion