Patent Publication Number: US-2005129397-A1

Title: Exposure device

Description:
CROSS-REFERENCE TO RELATED APPLICATION  
      This application is a Continuation-in-Part of pending U.S. Ser. No. 10/456,680 filed Jun. 9, 2003, which claims priority under 35 USC 119 from Japanese Patent Application No. 2002-167411 filed Jun. 7, 2002, the disclosures of which are incorporated by reference herein. 
    
    
     BACKGROUND OF THE INVENTION  
      1. Field of the Invention  
      The present invention relates to an exposure device, and in particular, to an exposure device which exposes a photosensitive material with a light beam modulated by a space modulation element or the like in accordance with image information.  
      2. Description of the Related Art  
      Conventionally, various types of exposure devices, in which exposing is carried out with a light beam modulated by using a space modulation element such as a digital micro-mirror device (DMD) or the like in accordance with image data (image information), are proposed.  
      For example, the DMD is a mirror device in which many mirrors whose reflecting surface angle can be changed in accordance with control signal are arranged on a semiconductor substrate such as a silicon substrate or the like in two dimensional manner. A exposure device using the DMD has a light source, a (first) lens system, the DMD and a (second) lens system. The light source irradiates a laser light. The first lens system collimates the light beam irradiated from the light source. The DMD is disposed in a substantially focusing position of the first lens system. The light beam reflected at the DMD is image-formed by the second lens system on a scanning surface. The light beam is modulated by on-off controlling of each of the micro-mirrors of the DMD by the control signal generated in accordance with the image data or the like. Image exposure is carried out by the modulated laser light.  
      Such exposure device is used, for example, for exposing a photo resist which is used when manufacturing a printed wiring plate. As the result, many advantages are obtained such that cost for manufacturing and managing a photomask is reduced, a time required for trial manufacturing of a printed wiring board becomes shorter, change of design or the like of a circuit can be carried out easily and speedy, and the like. Recently, a build up wiring plate has been developed in order to respond to requirement for high density packaging. Using of the above mentioned exposure device when manufacturing the build up wiring plate has been investigated.  
      However, when manufacturing of the build up wiring board, an electric circuit (a wiring pattern) is formed on a surface of a build up layer laminated on a core substrate by an alignment mark (an inner via, a pattern, a pad or the like) provided at the core substrate (an inner layer substrate) being as a reference. Accordingly, the exposure device has a problem in an alignment (identification of the alignment mark and positioning (aligning) of an exposure pattern) which is carried out after the build up layer is laminated on the core substrate.  
      For example, such as a scanning type drawing equipment described in a Japanese Patent Laid-Open No. 2000-275863, when a pattern is recorded on a laminated material of a print wiring board or the like by means of a conventional device which directly exposes (records image) on a photo resist in a mask-less manner, an alignment mark such as a through hole or the like is detected by an image-pickuping device with a visible light, and a wiring patter formed on each layer is positioned (aligned). However, it is difficult to identify the alignment mark on the core substrate after building up (laminating) of the build up layer by such image-pickuping device using a visible light when manufacturing the build up wiring board. Therefore, establishment of alignment technology becomes a problem in a case of to using an exposure device which exposes a pattern (an image) with light beam when manufacturing the build up wiring board.  
      On the other hand, by that an alignment mark is masked by a tape before plating and the tape is stripped (removed) after plating thereby the alignment mark can be visually identified in order to enable to identify the alignment mark, identification may be carried out by using the image-pickuping device mentioned above or the like. However, manufacturing processes cannot be automated by the method mentioned above, merit to introduce the device fades, and there is a problem that a manufacture cost has risen.  
     SUMMARY OF THE INVENTION  
      The present invention was developed in consideration of the above mentioned problems, and an object of the present invention is to provide an exposure device by which aligning of an exposure pattern is realized when manufacturing a build-up structure such as a build up wiring board or the like, and which can cope with automation of manufacturing process.  
      A first aspect of the present invention is an exposure device which exposes a photosensitive material with a light beam modulated in accordance with image information, the device comprising a reading section which reads a radioscopic image of a specific pattern provided on an inner layer of a laminated structure; and an aligning section which aligns an exposure position of the photosensitive material laminated on a surface of an outer layer of the laminated structure, on the basis of position information of the read radioscopic image of the specific pattern.  
      In a second aspect of the present invention is the image recording device according to the first aspect, the device further comprises a spatial modulating element which modulates the light beam, and a moving section which relatively moves the spatial modulating element and the laminated structure in a direction parallel to a surface, of the photosensitive material, to be exposed, wherein the aligning section includes the moving section.  
      In a third aspect of the present invention is the image recording device according to the first aspect, the device further comprises a spatial modulating element which modulates the light beam, and a control section which controls the spatial modulating element according to a control signal generated in accordance with the image information, wherein the aligning section includes the control section.  
      In each of a fourth, a fifth and sixth aspects of the present invention is the image recording device according to the first, the second and the third aspects, respectively, the reading section is an X-ray image-pickup section which picks up a radioscopic image using an X-ray irradiated on the laminated structure.  
      In each of a seventh, an eighth and a ninth aspects of the present invention is the image recording device according to the first, the second and the third aspects, respectively, the laminated structure is a build-up wiring board comprising a core substrate as the inner layer and at least one build-up layer as the outer layer.  
      In a tenth aspect of the present invention is the image recording device according to the first aspect, the device further comprises a spatial modulating element which modulates the light beam, a moving section which relatively moves the spatial modulating element and the laminated structure in a direction parallel to a surface, of the photosensitive material, to be exposed of the photosensitive material, and a control section which controls the spatial modulating element according to a control signal generated in accordance with the image information, wherein the aligning section includes the moving section and the control section.  
      In an eleventh aspect of the present invention is the image recording device according to the tenth aspect, the moving section aligns the exposure position of the photosensitive material in at least one direction selected from among a main scanning direction, a sub scanning direction and a rotation direction, and the control section aligns the exposure position of the photosensitive material in the remaining direction among the main scanning direction, the sub scanning direction and the rotation direction.  
      In a twelfth aspect of the present invention is the image recording device according to the eleventh aspect, the reading section is an invisible light image-pickup section which picks up a radioscopic image using an invisible light irradiated on the laminated structure.  
      In a thirteenth aspect of the present invention is the image recording device according to the twelfth aspect, the invisible light is radiation which can transmit through the laminated structure.  
      In the first aspect of the present invention, the reading section reads the radioscopic image of the specific pattern provided on the inner layer of the laminated structure. The aligning section carries out an exposure alignment of the photosensitive material laminated on the surface of the outer layer of the laminated structure on the basis of the position information of the read radioscopic image of the specific pattern. That is, a position (an image recorded position) at which the photosensitive material is exposed with the light beam modulated in accordance with the image information is aligned to a predetermined position which is determined by the specific pattern being as the reference. The radioscopic image of the specific pattern is obtained, for example, by irradiating a light of wavelength which transmits through the laminated structure and the specific pattern.  
      As the result, in the present invention, when manufacturing of the laminated structure such as the build-up wiring board or the like, the alignment of the exposure pattern, that is, the exposure-alignment of the circuit pattern formed on the surface of the build up layer (the outer layer) can be realized by the alignment mark (the specific pattern) provided on the core substrate (the inner layer) being as reference. Further, it can be carried out to correspond to the automization of the manufacture process.  
      In the second aspect of the present invention, the alignment is carried out such that the spatial modulating element which modulates the light beam and the laminated structure are relatively moved by the moving section in the direction so as to be parallel to the surface to be exposed of the photosensitive material. The direction so as to be parallel to the surface to be exposed of the photosensitive material is a direction, for example, a main scanning direction of the light beam (a X direction), a sub scanning direction of the light beam (a Y direction), a rotation direction to which this X-Y coordinate system is rotated, and the like. Namely, the direction parallel to the surface to be exposed of the photosensitive material is one of the directions mentioned above, or combination of a plurality of directions mentioned above. The alignment of the exposure position can be easily realized due to that the an mechanically structured moving section is used as the aligning section mentioned above.  
      In the third aspect of the present invention, the control section controls the spatial modulating element to change modulating timing or the like of the light beam on the basis of the control signal generated in accordance with the image information. As the result, exposure alignment is carried out. Even if the aligning section is structured by the electrical control section which changes the modulating timing or the like of the light beam, the exposure pattern alignment can be carried out. Further, the device structure can be more simple compared to a case in which the an mechanically structured moving section is used as the aligning section.  
      In the fourth aspect of the present invention, the X-ray is irradiated on the laminated structure, and the X-ray image-pickup section picks up the radioscopic image (the X-ray transmitted through the laminated structure). As the result, the radioscopic image of the specific pattern can be image-picked surely. Further, the above mentioned reading section can be realized by a practical structure which is taken the image-pickuping accuracy, the cost and the like into consideration. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       FIG. 1  is a perspective view illustrating an appearance of an exposure device related to an embodiment of the present invention.  
       FIG. 2  is a perspective view illustrating a scanner of the exposure device related to the embodiment of the present invention.  
       FIG. 3A  is a plan view illustrating an exposed region formed on a photosensitive material.  
       FIG. 3B  illustrates an arrangement of exposing areas by each of exposure heads.  
       FIG. 4  is a perspective view illustrating schematic structure of the exposure head of the exposure device related to the embodiment of the present invention.  
       FIG. 5A  is a cross sectional view illustrating a structure of the exposure head shown in  FIG. 4  along an optical axis in a sub scanning direction.  
       FIG. 5B  is a side view of  FIG. 5A .  
       FIG. 6  is a partial enlarged view illustrating a structure of a digital micro-mirror device (DMD).  
       FIG. 7A  is an explaining view for explaining an operation of the DMD.  
       FIG. 7B  is an explaining view for explaining an operation of the DMD.  
       FIG. 8A  is a plane view illustrating scanning locus of exposure beams in a case in which the DMD is not arranged in an inclined manner.  
       FIG. 8B  is a plane view illustrating scanning locus of exposure beams in a case in which the DMD is arranged in an inclined manner.  
       FIG. 9A  is a perspective view illustrating a structure of a fiber array light source.  
       FIG. 9B  is a partial enlarged view of  FIG. 9A .  
       FIG. 9C  is a plane view illustrating an arrangement of emission points at a laser emitting section.  
       FIG. 9D  is a plane view illustrating another example of an arrangement of the emission points at the laser emitting section.  
       FIG. 10  illustrates a structure of a multi-mode optical fiber.  
       FIG. 11  is a plane view illustrating a structure of a composite-wave laser light source.  
       FIG. 12  is a plane view illustrating a structure of a laser module.  
       FIG. 13  is a side view illustrating a structure of the laser module shown in  FIG. 12 .  
       FIG. 14  is a partial side view illustrating a structure of the laser module shown in  FIG. 12 .  
       FIG. 15  is a schematic block diagram of the exposure device related to the embodiment of the present invention.  
       FIG. 16A  illustrates an example of a used region of the DMD.  
       FIG. 16B  illustrates another example of a used region of the DMD.  
       FIG. 17A  is a side view illustrating an exposure system of the present invention in a case in which the used region of the DMD is appropriate.  
       FIG. 17B  is a cross sectional view of the  FIG. 17A  along the optical axis in the sub scanning direction.  
       FIG. 18A  is a cross sectional view for explaining a manufacture method of a build up wiring board and illustrating a core substrate.  
       FIG. 18B  is a cross sectional view for explaining a manufacture method of the build up wiring board and illustrating a state in which a build up layer is laminated on the core substrate.  
       FIG. 18C  is a cross sectional view for explaining the manufacture method of the build up wiring board and illustrating a state in which a prepared hole of a via hole is formed.  
       FIG. 18D  is a cross sectional view for explaining the manufacture method of the build up wiring board and illustrating a state in which a conductive layer is plated on the build up layer.  
       FIG. 18E  is a cross sectional view for explaining the manufacture method of the build up wiring board and illustrating a state in which a photo resist is coated.  
       FIG. 18F  is a cross sectional view for explaining the manufacture method of the build up wiring board and illustrating a state in which the photo resist is exposed.  
       FIG. 18G  is a cross sectional view for explaining the manufacture method of the build up wiring board and illustrating a state in which the photo resist is subject to developing process and an etching mask is formed.  
       FIG. 18H  is a cross sectional view for explaining the manufacture method of the build up wiring board and illustrating a state in which a circuit is formed on the build up layer by etching.  
       FIG. 18I  is a cross sectional view for explaining the manufacture method of the build up wiring board and illustrating the completed build up wiring board.  
       FIG. 19  illustrates micro mirror columns arranged in a zigzag pattern.  
       FIG. 20  illustrates micro mirror columns in a parallelogram pattern.  
       FIG. 21  illustrates a shift of a beam spot with respect to an adjacent column and in the column direction.  
       FIG. 22  illustrates a micro lens array that may be used to obtain the patterns illustrated in  FIGS. 19-21 . 
    
    
     DETAILED DESCRIPTION OF THE INVENTION  
      Referring to drawings, an embodiment of the present invention will be described hereinafter in detail.  
      Structure of Exposure Device  
      An outside view of an exposure device relating to an embodiment of the present invention is illustrated in  FIG. 1  and  FIG. 15  is a block diagram illustrating a schematic structure of the device.  
      As shown in  FIG. 1 , an exposure device  100  is provided with a flat plate shaped stage  152 . The stage  152  holds thereon a build up wiring board material (a build up wiring board  200 ) on which a photosensitive material  150  is coated such that the photosensitive material  150  is absorbed on a surface of the stage  152 . A thick plate shaped setting stand  156  is supported by four leg portions  154 . Two guides  158  are provided in an elongating manner along stage moving directions (a direction indicated by an arrow Y in  FIG. 1 ) on a top surface of the setting stand  156 . The stage  152  is arranged such that a longitudinal direction of the stage  152  corresponds to the stage moving direction. The stage  152  is supported on the guides  158  so as to be movable to-and-fro.  
      The stage  152  has a two-stages structure (a top stage and a bottom stage). That is, the stage  152  comprises a setting board  180  and a stage base  182 . The build up wiring board  200  is set on the setting board  180 . The stage base  182  supports the setting board  180  such that a center of the setting board  180  (a point of intersection of diagonals) is as a rotation center and the setting board  180  can be rotated (in a direction of arrow θ shown in  FIG. 1 ) within a range of a predetermined angle. The setting board  180  is driven to rotate by means of a rotation driving device  184  provided between the setting board  180  and the stage base  182 .  
      The stage  152  is moved along the guides  158  due to that the stage base  182  is driven by a stage driving device  186 . The rotation driving device  184  and the stage driving device  186  are connected to a driving device control section  188 . The driving device control section  188  receives instruction from a controller  190  and outputs a control signal. The rotation driving device  184  and the stage driving device  186  are controlled on the basis of the control signal.  
      A gate  160  formed to have an U-shaped configuration is disposed at a central portion of the setting stand  156  such that the gate  160  crosses a moving pass of the stage  152 . Two tip ends of the gate  160  are fixed to side surfaces of the setting stand  156 , respectively. A scanner  162  is disposed at an one side with respect to the gate  160 , and two X-ray CCD cameras  164  ( 164 A and  164 B) are disposed at the other side with respect to the gate  160 , with a predetermined distance therebetween. The scanner  162  and X-ray CCD cameras  164  are attached on the gate  160  respectively such that the scanner  162  and X-ray CCD cameras  164  are positioned above the moving path of the stage  152  in a fixed manner. In addition, the scanner  162  is controlled by a scanner control section  192  connected to the controller  190 .  
      Inside the setting stage  156 , X-ray light sources  165 A and  165 B are provided. Each of the X-ray light sources  165 A and  165 B are positioned below the respective X-ray CCD cameras  164 A and  164 B, and face the respective X-ray light sources  165 A and  165 B. X-rays are irradiated upward from the respective X-ray light sources  165 A and  165 B, and are incident to the respective (namely, corresponding) X-ray CCD cameras  164 A and  164 B. Operations of these X-ray CCD cameras  164 A and  164 B and X-ray light sources  165 A and  165 B are controlled by means of controller  190 . In addition, image data of pickuped images picked up by the X-ray CCD cameras  164 A and  164 B is sent to an image processing section  194 , and a predetermined data processing is carried out. The processed data is input to the controller  190 .  
      The scanner  162  is provided with a plurality of exposure heads  166  (for example, fourteen exposure heads  166 ) arranged in a substantially matrix manner of m rows and n columns (for example, three rows and five columns), as shown in  FIG. 2 . Note that  FIG. 3B  illustrates an arrangement of the exposing areas  168  by the exposure heads  166 , however, the exposure heads  166  are illustrated in  FIG. 3B  in order to show a relationship between the exposure heads  166  and the exposing areas  168 . In this example, four exposure heads  166  are disposed in a third row due to relationship with a width of the photosensitive material  150  (the build up wiring board  200 ). Hereinafter, an exposure head which is located in a position of m-th row and n-th column is represented as an exposure head  166   mn .  
      An exposure area  168  by the exposure head  166  has a rectangular configuration whose short side is along a sub scanning direction. Therefore, with moving of the stage  152 , exposed regions  170  having a band shape are formed on the photosensitive material  150  by the respective exposure heads  166 . Hereinafter, an exposure area by the exposure head  166   mn  located in the position of m-th row and n-th column is represented as an exposure area  168   mn .  
      In addition, as shown in  FIGS. 3A and 3B , the band shaped exposed regions  170  are arranged in a direction perpendicular to the sub scanning direction without a gap therebetween. This is archived due to the arrangement of the exposure heads  166 . That is, in each row in which the exposure heads  166  are arranged in a line manner, the exposure heads  166  are arranged in the direction perpendicular to the sub scanning direction so as to have a predetermined interval therebetween (the predetermined interval is a length which is the natural number multiple of a long side of the exposure area  168 , in the present embodiment, the predetermined interval has a length twice of the long side of the exposure area  168 ). Further, a position of the exposure head  166   21  is shifted in the direction perpendicular to the sub scanning direction with respect to a position of the exposure head  166   11 , and a position of the exposure head  166   31  is shifted in the direction perpendicular to the sub scanning direction with respect to the position of the exposure head  166   21 . Therefore, a portion between the exposure area  168   11  and the exposure area  168   12  in the first row, which portion cannot be exposed by the exposure head  166   11  and the exposure head  166   12 , is exposed by the exposure head  166   21  in the second row and the exposure head  166   31  in the third row.  
      Each of the exposure heads  166   11 - 166   mn  is provided with a digital micro-mirror device (DMD)  50  as shown in  FIG. 4  and  FIGS. 5A and 5B . The DMD  50  is as a spatial modulation element which modulates an incident light beam in accordance with image data every each pixel.  
      An image data processing section and a mirror driving control section are built in the scanner control section  192  which controls driving of the scanner  162 . In the image data processing section, at every each exposure head  166 , control signals for controlling driving each micro-mirror in a region to be controlled in the DMD  50  are generated on the basis of image data inputted from the controller  190 . The region to be controlled is described later. In addition, in the mirror driving control section, on the basis of the control signals generated in the image data processing section, an angle of a reflection surface of each micro-mirror of the DMD  50  is controlled at every each exposure head  166 . Control of the angle of the reflection surface of the DMD  50  is described later.  
      A fiber array light source  66 , a lens system  67  and a mirror  69  are disposed in that order at a light incident side of the DMD  50 . The fiber array light source  66  is provided with a laser emitting section at which emitting ends (emitting points) are arranged in a line manner in a direction corresponding to the long side of the exposure area  168 . The lens system  67  compensates the laser light emitted from the fiber array light source  66  and condenses the laser light on the DMD  50 . The laser beam transmitted the lens system  67  is reflected toward the DMD  50  on the mirror  69 .  
      The lens system  67  comprises a pair of lenses  71 , a pair of lenses  73  and a condensing lens  75 . The combination lenses  71  collimate the laser beam emitted from the fiber array light source  66  such that the laser beam becomes parallel. The combination lenses  73  compensate the collimated laser beam such that a light amount distribution of the laser beam becomes uniform. The condensing lens  75  condenses the laser beam in which the light amount distribution is uniformed on the DMD  50 . Further, the combination lenses  73  transmit a light so as to spread a flux of the light in the vicinity of an axis of the lenses in an arrangement direction of the laser beam emitting ends, and transmit a light so as to narrow the flux of the light at portions apart from the axis of the lenses in the arrangement direction of the laser beam emitting ends. Further, the combination lenses  73  transmit a light as it is in a direction orthogonal to the arrangement direction of the laser beam emitting ends. Therefore, the combination lenses  73  compensate the laser beam such that the light amount distribution of the laser beam becomes uniform.  
      In addition, in the light reflection side of the DMD  50 , lens systems  54  and  58  are provided. The lens systems  54  and  58  focus (image-form) the light beam which has been reflected by the DMD  50  on a scan surface (a surface to be exposed)  56  of the photosensitive material  150 . The lens systems  54  and  58  are disposed such that a relation of the DMD  50  and the surface to be exposed  56  is conjugate.  
      As shown in  FIG. 6 , on a SRAM cell (a memory cell)  60 , a minute mirror (a micro mirror)  62  is arranged such that the minute mirror is supported by leg portions. That is, the DMD  50  is a mirror device in which a lot of (for example,  600  x  800 ) minute mirrors forming pixels are arranged in a grid manner. At an uppermost portion of each pixel, the micro mirror  62  supported by the leg portions is provided, and a material having high reflection factor such as aluminum or the like is vapour-deposited on a surface of the micro mirror  62 . The reflection factor of the micro mirror  62  is equal to or more than 90%. In addition, directly below the micro mirror  62 , via the leg portions including a hinge and a yoke, the SRAM cell  60  of a CMOS (a complementary metal oxide semiconductor) (a silicon gate) produced at a production line of normal semiconductor memory is disposed. Overall structured is in a monolithic manner (an integral type).  
      The micro mirror  62  supported by the leg portions is inclined in a range of ±α degree (for example, ±10 degrees) with respect to a substrate on which the DMD  50  is provided (an inclination (a rotation) axis is a diagonal of the micro mirror) when digital signal is written in the SRAM cell  60  of the DMD  50 .  FIG. 7A  shows a state in which the micro mirror  62  is inclined by +a degree, indicating that the micro mirror  62  is ON state.  FIG. 7B  shows a state in which the micro mirror  62  is inclined by −α degree, indicating that the micro mirror  62  is OFF state. Therefore, in accordance with an image signal, an inclination of the micro mirror  62  in each pixel of the DMD  50  is controlled, for example, as shown in  FIG. 6 . As the result, the light incident to the DMD  50  is each reflected by the micro mirror  62  in accordance with the inclination of the micro mirror  62  (to a direction in accordance with the inclination of the micro mirror  62 ).  
      In  FIG. 6 , an one part of the DMD  50  is magnified, and an example of a state in which the micro mirrors  62  are controlled such that the micro mirrors  62  are inclined by +α degree or −α degree is shown. On-off control of each micro mirror  62  is carried out by the scanner control section  192  in which an instruction from the controller  190  is received. In addition, to a direction to which the light beam is reflected by the micro mirror  62  which is OFF state, an optical absorption body (not shown in the drawings) is provided.  
      In addition, it is desirable that the DMI  50  is disposed such that a short side of the DMD  50  is slightly inclined with respect to the sub scanning direction by a predetermined angle θ (for example, 1°-5°).  FIG. 8A  shows a scanning locus of each reflection light image (exposure beam)  53  by each (corresponding) micro mirror in a case in which the DMD  50  is not inclined.  FIG. 8B  shows a scanning locus of each reflection light image (exposure beam)  53  by each (corresponding) micro mirror in a case in which the DMD  50  is inclined.  
      In the DMD  50 , many sets (for example, 600 sets) of micro mirror columns are arranged in a short direction (a width direction) of the DMD  50 . In each micro mirror column, a lot of (for example,  800 ) the micro mirrors are arranged in a longitudinal direction of the DMD  50 . As shown in  FIGS. 8A and 8B , a pitch P 2  of the scanning locus (the scanning line) of the exposure beam  53  by each micro mirror (a distance between the adjacent scanning lines) in a case in which the DMD  50  is inclined is narrower than a pitch P 1  of the scanning locus (the scanning line) in a case in which the DMD  50  is not inclined. That is, a resolution can be much improved in the case in which the DMD  50  is inclined. On the other hand, a scanning width W 1  in the case in which the DMD  50  is not inclined is substantially the same as a scanning width W 2  in the case in which the DMD  50  is inclined, because an inclined angle of the DMD  50  is minute.  
      In addition, exposure is carried out by the different micro mirror lines on the same scanning line in a multiple manner (a multiplex exposure is carried out). As the result, due to the multiplex exposure, a slight small amount of an exposure position can be controlled, and high accuracy exposure can be realized. In addition, a splicing portion (a boundary) caused by the plural exposure heads arranged in a main scanning direction can be jointed without a step (in a uniform manner) by the slight small amount exposure position control.  
      If each micro mirror column is shifted in a direction orthogonal to the sub scanning direction by a predetermined distance with respect to the adjacent micro mirror column, that is, if the micro mirror columns are arranged in a zigzag manner as shown in  FIG. 19  or in a parallelogram pattern as shown in  FIG. 20 , instead of making the DMD  50  slant, a similar effect can be obtained. Alternatively, the beam spot is shifted by means of optical system (lens systems  54  and  58 ), thereby shifting the beam spot column-by-column or pixel-by-pixel within the column. As shown in  FIG. 21 , each beam spot on the scan surface  56  may be shifted with respect to the adjacent column and in the column direction. As shown in  FIG. 22 , these arrangements can be obtained by micro lens array  300  which has a plurality of lens each corresponding with each beam and adapted to tilt the beam axis regularly or randomly.  
      The fiber array light source  66  is provided with a plurality of laser modules  64  (for example,  6 ) as shown in  FIG. 9A . An one end of multi-mode optical fiber  30  is coupled with each laser module  64 . An optical fiber  31  is connected to another end of the multi-mode optical fiber  30 . A core diameter of the multi-mode optical fiber  30  is as the same as that of the optical fiber  31 , but a clad diameter of the optical fiber  31  is smaller than that of the multi-mode optical fiber  30 . The laser emitting section  68  is formed such that emitting ends of the optical fibers  31  (emission points) are arranged in one line in the main scanning direction that is perpendicular to the sub scanning direction as shown in  FIG. 9C . As shown in  FIG. 9D , the emission points can be arranged in two lines in the main scanning direction.  
      End portions of the optical fibers  31  are put (sandwiched) between two support plates  65  whose surface are flat, and fixed as shown in  FIG. 9B . In addition, a transparent protection board  63  such as a glass or the like is disposed at the light emitting side of the optical fibers  31  in order to protect end surfaces of the optical fibers  31 . The protection board  63  may be disposed so as to closely contact the end surfaces of the optical fibers  31 , or the end surfaces of the optical fibers  31  may be sealed in the protection board  63 . The emitting end portions of the optical fibers  31  are easily deteriorated and dust is easily collected at the emitting end portions of the optical fibers  31  due to a light density being high. However, due to disposing the protection board  63 , it can be prevented that dust adheres to the end surfaces of the optical fibers  31  and deterioration can be slowed.  
      In this example, in order to arrange the emitting end portions of the optical fibers  31 , whose clad diameter is small, in one line without a gap therebetween as shown in  FIG. 9C , the multi-mode optical fibers  30 , whose clad diameter is large, are arranged in two lines manner (in the vicinity of the optical fibers  31 ) as shown in  FIGS. 9A and 9B . That is, an optical fiber  31  is arranged between two optical fibers  31  in one line, but a multi-mode optical fiber  30  connected to the optical fiber  31  arranged between the two optical fibers  31  is disposed (piled) onto two multi-mode optical fibers  30  which are respectively connected to the two optical fibers  31 . Namely, the multi-mode optical fiber  30  connected to the optical fiber  31  arranged between the two optical fibers  31  and the two multi-mode optical fibers  30  respectively connected to the two optical fibers  31  are not arranged in one line.  
      In the embodiment, for example, as shown in  FIG. 10 , the optical fiber  31 , whose clad diameter is small and which has length of 1 cm-30 cm, is connected in a coaxial manner to a tip end at the laser light emitting side of the multi-mode optical fiber  30  whose clad diameter is large. An incident end surface of the optical fiber  31  is connected by fusion to the emitting end surface of the multi-mode optical fiber  30  such that a central axis of the optical fiber  31  coincides with that of the multi-mode optical fiber  30 . As described above, a diameter of the core  31   a  of the optical fiber  31  is as the same as a diameter of the core  30   a  of the multi-mode optical fiber  30 .  
      Further, a short length optical fiber may be connected to the emitting end of the multi-mode optical fiber  30  via a ferrule, an optical connector or the like. The short length optical fiber is formed such that an optical fiber whose length is short and a clad diameter is large is connected by fusion to an optical fiber whose clad diameter is small. Due to that the short length optical fiber is connected detachably to the multi-mode optical fiber  30  by using the connector or the like, in a case in which the optical fiber whose clad diameter is small is damaged, it is easy to replace this (damaged) tip portion. As the result, a cost required for maintenance the exposure head can be reduced. Hereinafter, there may be a case in which the optical fiber  31  is called as an emitting end (portion) of the multi-mode optical fiber  30 .  
      As the multi-mode optical fiber  30  and the optical fiber  31 , any one of a step index type optical fiber, a graded index type optical fiber and a complex type optical fiber can be used. For example, the step index type optical fiber made in Mitsubishi Cable Industries Co., Ltd. can be used. In this embodiment, the multi-mode optical fiber  30  and the optical fiber  31  are the step index type optical fiber. In the multi-mode optical fiber  30 , a clad diameter is 125 μm, a core diameter is 25 μm, NA is 0.2, a transmittance of an incident end surface coat is equal to or more than 99.5%. In the optical fiber  31 , a clad diameter is 60 μm, a core diameter is 25 μm, NA is 0.2.  
      The laser module  64  is structured by a composite wave laser light source (a fiber light source) as shown in  FIG. 11 . The composite wave laser light source comprises a plurality of (for example, 7) UV (system) semiconductor lasers LD 1 , LD 2 , LD 3 , LD 4 , LD 5 , LD 6  and LD 7 , collimator lenses  11 ,  12 ,  13 ,  14 ,  15 ,  16  and  17 , a single condenser lens  20  and one multi-mode optical fiber  30 . The UV semiconductor lasers are arranged and fixed on a heat block  10 , and are a transversal multi-mode or a single mode having a chip configuration. The UV semiconductor lasers LD 1 -LD 7  correspond to the collimator lenses  11 - 17 , respectively. Oscillation wavelengths of the UV semiconductor lasers LD 1 -LD 7  are the same, and maximum outputs of the UV semiconductor lasers LD 1 -LD 7  are the same. In the embodiment, a number of the UV semiconductor lasers is seven, however, the present invention is not limited to the same.  
      The composite wave laser light source described above is accommodated in a box shaped package  40  together with other optical elements as shown in  FIG. 12  and  FIG. 13 . An upper side of the package  40  is open. The package  40  is provided with a package cover  41  for closing an opening of the package  40 . Gas for sealing is filled into the package  40  in which the opening is closed by the package cover  41  after deairing process is carried out. As the result, the above mentioned composite wave laser light source is sealed gastightly within a closed space (a sealed space) formed by the package  40  and the package cover  41 .  
      A base board  42  is fixed to a bottom of the package  40 , the heat block  10 , a condenser lens holder  45  which holds the condenser lens  20  and a fiber holder  46  which holds the incident end portion of the multi-mode optical fiber  30  are attached on a top surface of the base board  42 . The emitting end portion of the multi-mode optical fiber  30  is drawn to an external of the package  40  from an opening formed on a wall surface of the package  40 .  
      In addition, a collimator lens holder  44  is attached at a side surface of the heat block  10 , and the collimator lenses  11 - 17  are held on the collimator lens holder  44 . An opining is formed in a side wall surface of the package  40 , and interconnections  47  which supply drive electric currents to the semiconductor lasers LD 1 -LD 7  are drawn through this opening to an external of the package  40 .  
      In order to prevent  FIG. 13  from being complicated, a number is applied to only the UV semiconductor laser LD 7  among the plurality of the UV semiconductor lasers, and a number is applied to only the collimator lens  17  among the plurality of collimator lenses.  
       FIG. 14  shows a front configuration of a portion at which the above mentioned collimator lenses  11 - 17  are attached. Each of the collimator lenses  11 - 17  is formed in a configuration such like that a region including an optical axis of a circular lens provided with an aspheric surface is cut by planes which are parallel. Therefore, each has an elongated configuration. The collimator lens having elongated configuration can be formed, for example, by molding resin or optical glass. The collimator lenses  11 - 17  are nearly (closely) arranged in an arrangement direction of emission points of the UV semiconductor lasers LD 1 -LD 7  (a right-left direction in  FIG. 14 ) such that a longitudinal direction of the collimator lens is perpendicular to the arrangement direction of the emission points of the UV semiconductor lasers LD 1 -LD 7 .  
      On the other hand, as the UV semiconductor lasers LD 1 -LD 7 , lasers each of which is provided with an active layer whose emission width is 2 μm and which emit laser beams B 1 -B 7 , respectively, are used. The laser beams B 1 -B 7  are emitted in a condition in which a spread angle in a direction parallel to the active layer is, for example, 10 degree, and a spread angle in a direction perpendicular to the active layer is, for example, 30 degree. The UV semiconductor lasers LD 1 -LD 7  are arranged such that emission points are arranged in one line in the direction parallel to the active layer.  
      Therefore, the laser beams B 1 -B 7  are incident to the respective collimator lenses  11 - 17  having elongated configuration mentioned above, in a state in which a direction in which the spread angle is large coincides with the longitudinal direction of the collimator lens and a direction in which the spread angle is small coincides with the width direction (a direction perpendicular to the longitudinal direction) of the collimator lens. That is, the width of each of the collimator lenses  11 - 17  is 1.1 mm, the length of that is 4.6 mm, diameters of the beams incident to the respective collimator lens  11 - 17  are 0.9 mm in the horizontal direction and 2.6 mm in the vertical direction. In addition, in each of the collimator lenses  11 - 17 , a focus distance f 1  is 3 mm, NA is 0.6, and a lens arrangement pitch is 1.25 mm.  
      The condenser lens  20  is formed in a configuration such like that a region including an optical axis of a circular lens provided with an aspheric surface is cut by planes which are parallel. Therefore, the condenser lens  20  has an elongated configuration in the horizontal direction, and has a short dimension in a direction perpendicular to the horizontal direction. For example, in the condenser lens  20 , a focus distance f 2  is 23 mm, NA is 0.2. This condenser lens  20  can be formed, for example, by molding resin or optical glass.  
      Operation of Exposure Device  
      Next, an operation of the exposure device mentioned above will be explained.  
      In each exposure head  166  of the scanner  162 , the laser beams B 1 , B 2 , B 3 , B 4 , B 5 , B 6  and B 7  are emitted, in a state of divergent ray, from the respective UV semiconductor lasers LD 1 -LD 7  included in the composite wave laser light source of the fiber array light source  66 . These laser beams B 1 , B 2 , B 3 , B 4 , B 5 , B 6  and B 7  are changed to parallel lights by means of the corresponding collimator lenses  11 - 17 . The laser beams B 1 , B 2 , B 3 , B 4 , B 5 , B 6  and B 7  which are collimated are collected (condensed) by means of the condenser lens  20 , and converges in the incident end surface of the core  30   a  of the multi-mode optical fiber  30 .  
      In this embodiment, a collection optic system is constructed by the collimator lenses  11 - 17  and the condenser lens  20 , and a composite-wave optic system is constructed by the collection optic system and the multi-mode optical fiber  30 . That is, the laser beams B 1 -B 7  condensed by the condenser lens  20  as mentioned above are incident into the core  30   a  of the multi-mode optical fiber  30 , then transmits in the optical fiber. The laser beams are wave-compounded and the composite single laser beam B is emitted from the optical fiber  31  connected to the emitting end surface of the multi-mode optical fiber  30 .  
      In a case in which a combination (bonding) efficiency of the laser beams B 1 -B 7  to the multi-mode optical fiber  30  is 0.85 and each output of the UV semiconductor lasers LD 1 -LD 7  is 30 mW in each laser module, the composite laser beam B of an output 180 mW (=30 mW×0.85×7) is obtained in each of the optical fibers  31  that are arranged in array manner. Therefore, an output at the laser outputting portion  68  in which six optical fibers  31  are arranged in array manner is about 1 W (=180 mW×6).  
      In the laser emitting portion  68  of the fiber array light source  66 , high brightness emission points are arranged in the main scanning direction in one line. In a conventional fiber light source in which a laser light from a single semiconductor laser is connected (incident) to a single optical fiber, an output is low. Accordingly, a desired output cannot be obtained in a case in which optical fibers are not arranged in many lines (columns) in the conventional fiber light source. However, in the composite laser light source used in the present embodiment, an output is high, therefore, a desired output can be obtained even though a few lines arrangement, for example, an one line arrangement.  
      When image data in accordance with an exposure pattern is inputted into the controller  190 , the image data is stored once in a frame memory in the controller  190 . This image data is data in which a density of each pixel which forms an image is represented with binary (presence of a record of a dot or not).  
      The stage  152  on which the build up wiring board  200  is set is moved from an up stream side to a down stream side of the gate  160  at a constant speed along the guides  158  by the stage driving device  186 . When the stage  152  passes under the gate  160  and the photosensitive material  150  (the build up wiring board  200 ) reaches a predetermined position, the image data stored in the frame memory is read such that each data corresponding to a plurality of lines of the image is sequential read. On the basis of the image data read, at the data processing section, a control signal is generated every each exposure head  166 . Then, on the basis of the generated control signal, each of micro mirrors of the DMD  50  is on-off controlled every each exposure head  166  by the mirror driving control section.  
      When the laser light is irradiated from the fiber array light source  66  to the DMD  50 , the laser beam reflected at the time of ON state of the micro mirror of the DMD  50  is imaged (image-formed) on a surface to be exposed  56  of the photosensitive material  150  by the lens systems  54  and  58 . In this way, the laser light emitted from the fiber array light source  66  is on or off controlled every pixel, and the photosensitive material  150  (the exposure area  168 ) is exposed with a pixel unit which has a substantially the same number of the pixels used in the DMD  50 . In addition, the photosensitive material  150  is sub scanned by the scanner  162  in a direction opposite to the stage moving direction due to that the photosensitive material  150  (the build up wiring board  200 ) is moved at the constant speed together with the stage  152 , and an exposed region  170  of a belt shape is formed every each exposure head  166 .  
      As shown in  FIGS. 16A and 16B , in the present embodiment, in the DM 1   50 , the micro mirror columns of 600 sets, each of which 800 micro mirrors are arranged in the main scanning direction, are arranged in the sub scanning direction. However, in the present embodiment, the controller controls the DMD  50  such that only a portion of the micro mirror columns (for example, 100 sets of the micro mirror columns, that is, 800×100 micro mirrors) are driven.  
      As shown in  FIG. 16A , micro mirror columns located in a central portion of the DMD  50  may be used, or micro mirror columns located in an end portion of the DMD  50  may be used as shown in  FIG. 16B . In addition, in a case in which one (or some) micro mirror is damaged (has a defect), micro mirror columns which do not include a defect micro mirror are used, that is, micro mirror columns which are used can be changed appropriately depending on the situation.  
      A speed of processing data of the DM 1   50  has a limited maximum speed. A modulation rate (speed) of an one line is determined in proportion to the number of pixels to be used. The modulation rate of the one line becomes faster by using only a part of the micro mirror columns compared with a case in which all micro mirror columns are used. Note that it is not necessary that all micro mirror columns in the sub scanning direction are used in a case of an exposure system in which the exposure head is relatively moved continuously with respect a surface to be exposed.  
      For example, in a case in which only 300 sets of the micro mirror columns among 600 sets of the micro mirror columns are used, the modulation rate per one line is two times as fast as that in a case in which all 600 sets of the micro mirror columns are used. Further, in a case in which only 200 sets of the micro mirror columns among 600 sets of the micro mirror columns are used, the modulation rate per one line is three times as fast as that in the case in which all 600 sets of the micro mirror columns are used. That is, in this case, a region having a length of 500 mm in the sub canning direction can be exposed in 17 seconds. Moreover, in a case in which only 100 sets of the micro mirror columns among 600 sets of the micro mirror columns are used, the modulation rate per one line is six times as fast as that in the case in which all 600 sets of the micro mirror columns are used. That is, in this case, the region having the length of 500 mm in the sub scanning direction can be exposed in 9 seconds.  
      More than or equal to 10 and less than or equal to 200 are desirable for the number of micro mirror columns to be used, that is, the number of micro mirrors arranged in the sub scanning direction. More than or equal to 10 and less than or equal to 100 are more desirable. An area of one micro mirror, corresponding to one pixel, is 1.5 μm×15 μm. Therefore, when converting the above into a micro mirror used region of the DMD  50 , a region of more than or equal to 12 mm×150 μm and less than or equal to 12 mm×3 mm are preferable, and a region of more than or equal to 12 mm×150 μm and less than or equal to 12 mm×1.5 mm are more preferable.  
      If the numbers of micro mirror columns to be employed are within the above mentioned range, the laser beam emitted from the fiber array light source  66  is made substantially parallel by the lens system  67 , and can be irradiated onto the DMD  50 , as shown in  FIGS. 17A and 17B . It is preferable that an irradiation region to which the laser light is irradiated by the DMD  50  agrees with the used region in the DMD  50 . Because if the irradiation region is larger than the used region, usage-efficiency of the laser light falls.  
      On the other hand, it is necessary that a diameter in the sub scanning direction of the light beam condensed on the DMD  50  is made small by the lens system  67  depending on the numbers of micro mirrors arranged in the sub scanning direction. In a case in which the number of micro mirror columns to be used are less than ten, an angle of luminous flux incident to the DMD  50  becomes large, as the result, the depth of focus of the light beam on the scanned surface  56  becomes shallow (small). Therefore, it is not preferable that the number of micro mirror columns to be used are less than ten. In addition, it is preferable, in a point of view of modulation rate (speed), that the number of micro mirror columns to be used are less than or equal to 200. In addition, the DMD is a spatial modulation element of a reflection type, however,  FIGS. 17A and 17B  are development figures for explaining optical relation.  
      When the sub scanning of the photosensitive material  150  by the scanner  162  is finished, the stage  152  returns in its original position located in the most upstream side with respect to the gate  160  along the guides  158  by the stage driving device  186 . Then, the stage  152  is moved from the up stream side to the down stream side with respect to the gate  160  in the constant speed along the guides  158  again.  
      Manufacture of a Build Up Wiring Board  
      Next, a manufacturing method of the build up wiring board by using the exposure device mentioned above will be explained.  
      As shown in  FIGS. 18A-18I , manufacturing processes of the build up wiring board are shown. A core substrate  202  is shown in  FIG. 18A . The core substrate  202  is manufactured by using method for manufacturing a normal multi-layer printed wiring board. In a substrate base  206 , within which wiring patterns (electric circuits)  204  are formed, such as FR-4 or the like, a blind via hole  208  is embedded with a resin  210  at a stage in which internal layer patterns are connected electrically by through hole copper plating, and wiring patterns  212  on a surface are formed by etching (subtractive etching).  
      In the build up wiring board  200  of the present embodiment shown in  FIG. 1 , the blind via holes  208  (hereinafter, referred as BVH  208 ) shown in  FIG. 18A  and the like are formed in the vicinity of four corners of the rectangular shaped substrate, respectively. Each of the BVHs  208  serves an alignment mark when manufacturing the substrate.  
      Next, as shown in  FIG. 18B , build up layers  218  are laminated on surfaces of the core substrate  202 . The build up layer  218  includes an insulation resin  214  and a copper foil  216 . As shown in  FIG. 18C , drilling processing (hole formation processing) for forming a micro (minute) hole by using a laser or the like is carried out at predetermined positions (corresponding to the wiring pattern  212 ) of the core substrate  202 . Mortar-shaped hole portions  220  formed in the build up layer  218  by this laser processing are base holes of via holes for connecting different layers electrically.  
      As shown in  FIG. 18D , copper plating is carried out to form conductor layers  222  on the surfaces of the build up layers  218 . The conductor layer  222  is thin layer by plating, that is, the conductor layer  222  is a minute circuit pattern. The copper foil  216  of the build up layer  218  and the wiring pattern  212  on the surface of the core substrate  202  are connected electrically by the via hole  224  on which the conductor layer  222  is formed.  
      As shown in  FIG. 18E , after coating (laminating in a case of a dry film) the photosensitive material (a photoresist)  150  such as a photosensitive epoxy resin or the like onto the surface of the substrate, the build up wiring board  200  is set on the stage  152  of the exposure device  100  of the present embodiment.  
      As shown in  FIG. 19E , when the device is operated to start exposure operation, X-ray CCD cameras  164 A and  164 B and X-ray light sources  165 A and  165 B are operated at the same time of starting of movement of the stage  152 . X-rays are irradiated from the X-ray light sources  165 A and  165 B, and transmit through the build up wiring board  200 . As the result, radioscopic images due to the X-rays are pickuped by means of the X-ray CCD cameras  164 A and  164 B.  
      The build up wiring board  200  is conveyed accompanying with the movement of the stage  152 . When the two BVHs  208  formed in the vicinity of a leading edge portion side in the moving direction approach below the X-ray CCD cameras  164 A and  164 B, radioscopic images of the respective BVH  208 s are picked up by means of the respective X-ray CCD cameras  164 A and  164 B. When the BVH  208  is located within a predetermined range of an image angle of the X-ray CCD camera (for example, a central portion of the image angle), moving of the stage  152  stops temporarily, a radioscopic image of the BVH  208  is picked up in a stationary state. As the result, an outline of the BVH  208  is image-picked up clearly, the BVH  208  provided at the core substrate  202  as the alignment mark is identified.  
      After image-pickuping the BVH, the image data of the BVH is processed at the image processing section  194  such that a density of each of pixels forming image is binarized, and the data is inputted into the controller  190 . The controller  190  calculates the data to obtain positional relation of the two BVHs  208 . As the result, position data of the build up wiring board  200  is obtained. This position data includes a shift amount in a X direction (in the main scanning direction) and a shift amount in a rotation direction of the build up wiring board  200 , and a position data in a Y direction (in the sub scanning direction). Then, the controller  190  outputs control signal for alignment to the scanner control section  192  and the drive device control section  188  such that an exposure position of the photosensitive material  150  exposed with the light beam becomes appropriate on the basis of the obtained position data.  
      In the present embodiment, aligning in the rotating direction is carried out first. When the control signal mentioned above is inputted into the drive device control section  188 , the rotation driving device  184  is controlled to be driven, and the setting board  180  is rotated in a predetermined direction such that positions of the two BVHs  208  in the Y direction coincide each other, that is, a relative inclination between an exposure pattern and the photosensitive material  150  is compensated. By aligning of this rotating direction, alignment in the rotating direction of the exposure pattern is carried out, and inclination of scanning line of the exposure beam is compensated.  
      Due to that the build up wiring board  200  is rotated, each position (a position in the X direction and in the Y direction) of the BVHs  208  is moved from the original position at which image-pickuping is carried out. Therefore, on the basis of positions (image data) of the BVHs  208  after the alignment in the rotating direction is carried out, the controller  190  obtains a shift amount in the X direction and position data in the Y direction of the build up wiring board  200 , and carries out alignment in each direction.  
      Regarding the alignment in the X direction, the image data in accordance with the exposure pattern stored in the frame memory in the controller  190  mentioned above is shifted by the shift amount in the X direction (in scanning direction of the exposure beam), and each micro mirror of the DMD  50  is on-off controlled at every each exposure head  166  by the control signal generated on the basis of the shifted image data. As the result, a scanning position of the exposure beam is aligned, and the alignment in the X direction of the pattern for exposing photosensitive material  150  is carried out.  
      Regarding the alignment in the Y direction, it is possible to carry out in the similar way in the case of the alignment in the X direction. However, in the present embodiment, in order to reduce calculation mount of image data to improve processing speed, a feed amount of the stage  152  is controlled. The control method is as follow. On the basis of the position in the Y direction of the BVH image data which BVH images are picked up by the X-ray CCD cameras  164 A and  164 B, the controller  190  outputs control signal for stage movement corresponding to irradiation timing of the light beam to the drive device control section  188 . On the basis of the control signal, the driving device  186  is control to be driven by the drive device control section  188 . Thus, the alignment in the Y direction of the exposure position is carried out.  
      When calculation process for carrying out above mentioned alignments completes, the stage  152 , that has been stopped in order to image-pickup the BVHs, starts to move. As mentioned above, the exposure pattern that alignment has been completed is exposed on the photosensitive material  150  with the laser light irradiated from the scanner  162  accompanying with the stage  152  moving.  
      For example, as shown in  FIG. 18F , a predetermined region above the via hole  224 , a circuit pattern formation part (not shown in the drawings) and the like are exposed with the laser light (arrows UV). In addition, arrows XR in the figure show X-rays irradiated onto the BVHs  208 .  
      After the exposure process of the photosensitive material  150  by the exposure device  100  is finished, the build up wiring board  200  in which exposure is completed is detached from the stage  152 . As shown in  FIG. 18G , the photosensitive material  150  is subject to developing process, and etching mask is formed. As shown in  FIG. 18H , the copper foil  216  and the conductor layer  222  are subtractive-etched, and the circuit pattern of the build up layer  218  is formed. Finally, as shown in  FIG. 181 , after stripping (removing) the etching mask (photosensitive material  150 ) left on the circuit pattern, a protecting layer (a solder resist) is coated on the surface of the substrate. Thus, manufacturing of the build up interconnection board  200  is completed.  
      The build up wiring board of the present embodiment is provided with the build up layers both sides thereon. Accordingly, exposure on the photosensitive material  150  by the exposure device  100  is carried out every each surface. That is, when the exposing on one surface side is finished, the substrate is reversed and the exposing on the other surface side is carried out. However, for the sake of convenience, in  FIGS. 18A-18I  which are used for explanation of the manufacturing method, the drawings are shown as if the circuits of the surfaces of the build up layers are formed by means of both-sides exposure.  
      In addition, pitch shifting of the BVH  208  may occur by thermal expansion of the build up wiring board or size irregularity of the build up wiring board. In this case, dimensional (size) change amount of the substrate is obtained from the pitch shift amount determined from the picked up image and the image data of each BVH  208 , and, on the basis of the dimensional change amount data, scaling is executed on the image data. As the result, alignment accuracy can be improved.  
      As discussed above, in the exposure device  100  of the present embodiment, the radioscopic images of the BVHs  208  provided at the core substrate  202  of the build up wiring board  200  are picked up by the X-ray CCD cameras  164 A and  164 B. On the basis of the position data of the build up wiring board  200  obtained from the image data, the rotation device  184 , the stage driving device  186  and the scanner  162  are controlled to be driven by the controller  190 , the drive device control section  188  and the scanner control section  192 , and a position of the exposure pattern to be exposed on the photosensitive material  150  is aligned. That is, the position of the exposure pattern by which the photosensitive material  150  is exposed with the light beam modulated in accordance with the image data is aligned to a predetermined position determined on the bases of the positions of the alignment marks (BVHs  208 ). By this, alignment in manufacturing of a laminated structure such as the build up wiring board or the like can be realized. Further, in the present embodiment, the processes from the identification of the alignment mark to the alignment of the exposure are carried out automatically. Accordingly, automation of manufacturing processes can be realized.  
      In addition, in the present embodiment, the scanner  162  provided with the DMD  50  modulating light beam and the photosensitive material  150  (the build up wiring board  200 ) are relatively moved in a direction parallel to the surface to be exposed  56  of the photosensitive material  150  by the stage  152  provided with rotation mechanism, and aligning (alignment in the Y direction and the rotating direction) is carried out. Namely, in the present invention, such aligning is carried out by use of mechanical moving meas. Accordingly, the aligning of the exposure pattern is carried out easily.  
      Further, in the present embodiment, alignment of exposure (alignment in the X direction) is also carried out in such a manner that the modulation timing of the laser light is changed by controlling of the DMD  50  of the scanner  162  on the basis of the control signal generated in the controller  190  in accordance with the image data. That is, alignment of the exposure pattern can be possible by use of the electrical control method that the modulation timing of the laser light is changed. Further, the device structure can be simplified in this case compared to a case in which all alignments are carried out by use of the mechanical control method.  
      In addition, in the present embodiment, the alignment marks are image-picked up with X-rays by using of the X-ray CCD cameras  164 A and  164 B in order to identify the alignment marks. As the result, the radioscopic image of the alignment mark can be picked up surely.  
      The present invention has been explained by the specific embodiment in detail as mentioned above. However, the present invention is not limited to the same. As for the present invention, other various kinds of embodiments are possible in range of the present invention.  
      For example, in the embodiment mentioned above, the example was described that the exposure device is used for alignment in the manufacturing process of the build up wiring board. However, it can be applied to the build-up (laminating) structure other than the build up wiring board. In addition, regarding the build up wiring board, it is not limited to the structure having one build up layer on each single surface. A plural numbers of the build up layers can be formed on the single surface. Further, regarding the alignment mark, a copper foil pad or a specific shaped pattern or the like can be used instead of the BVH. Even in a case in which the copper foil pad or the specific shaped pattern or the like is used as the alignment mark, the alignment mark provided in the internal layer can be identified by the exposure device of the present invention, alignment of exposure position can be carried out every each build up layer as the external layer.  
      In addition, in order to reduce the calculation amount of the image data in the controller, the image data is calculated only regarding the X direction, and regarding the Y direction and the rotation direction, the alignment is carried out by means of stage control. However, whether electrical method or mechanical method is used for alignment of each direction can be appropriately selected depending on specification of the device. In addition, in the present embodiment, a device other than the X-rays CCD camera can be used as a device which picks up a radioscopic image of an alignment mark. That is, a device which can pick up an radioscopic image of light of wavelength transmitting through an object to be image-picked up can be used instead of the X-rays CCD camera.  
      In addition, the exposure head comprising the DMD has been described as the spatial modulation element. However, for example, a spatial modulation element (SLM; a Spatial Light Modulator) of a MEMS (a Micro Electro Mechanical System) type can be used. Further, a liquid crystal light shutter (a FLC) or an optical element (a PLZT element) modulating a transmitted light by an electro-optic effect, or the like (that is, a spatial modulation element other than the MEMS type) can used. In these cases, a similar effect can be obtained.  
      In addition, the MEMS is a general term of a minute (micro) system in which micro-size sensor, an actuator and control circuit, in which micro-machine technology based on an IC manufacturing process is applied, are integrated. The spatial modulation element of the MEMS type means a spatial modulation element that is driven by an electric machine operation using static electricity force.  
      Because the exposure device of the present invention has the structure mentioned above, the aligning of the exposure pattern used in manufacturing of the laminated structure such as the build up wiring board can be realized, and can correspond to the automation of manufacturing process as well.