Abstract:
A through-hole electrode substrate includes a substrate including a through-hole extending from a first aperture of a first surface to a second aperture of a second surface, an area of the second aperture being larger than that of the first aperture, the through-hole having a minimum aperture part between the first aperture and the second aperture, wherein an area of the minimum aperture part in a planer view is smallest among a plurality of areas of the through-hole in a planer view, a filler arranged within the through-hole, and at least one gas discharge member contacting the filler exposed to one of the first surface and the second surface.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application is based upon and claims the benefit of priority from the prior Japanese Patent Application No. 2013-241392, filed on Nov. 21, 2013, and PCT Application No. PCT/JP2014/080649, filed on Nov. 19, 2014, the entire contents of which are incorporated herein by reference. 
     
    
     FIELD 
       [0002]    The embodiment of the invention is related to a through-hole electrode substrate arranged with a through-hole electrode which passes through a top surface and rear surface of a substrate. In particular, the embodiment of the invention is related to a through-hole electrode substrate used as an interposer substrate for connecting a plurality of elements. In addition, the embodiment of the invention is related to a semiconductor device which uses the through-hole electrode substrate. 
       BACKGROUND 
       [0003]    In recent years, the development of through-hole electrode substrates arranged with a conductive part which conducts a top surface and rear surface of a substrate as an interposer between LSI chips is progressing. This type of through-hole electrode substrate is formed with a through-hole electrode by filling a conductive material using electrolytic plating and the like within a through-hole. 
         [0004]    A LSI chip which has a narrow pitch and wiring with short dimensions is arranged on an upper surface of a through-hole electrode substrate. In addition, a semiconductor mounted substrate which has a wide pitch and wiring with long dimensions is arranged on the rear surface of a through-hole electrode substrate. The documents (see, for example, Japanese Patent Application No. 2005-514387, Japanese Patent Application No. 2010-548586, Japanese Patent Application No. 2003-513037, Japanese Patent Application No. 2011-528851, PCT Publication 2010/087483, PCT Publication 2005/034594, PCT Publication 2003/007370, PCT Publication 2011/024921, Japanese Patent No. 4241202 Specification, Japanese Patent No. 4203277 Specification, Japanese Patent No. 4319831 Specification, Japanese Patent No. 4022180 Specification, Japanese Patent No. 4564342 Specification, Japanese Patent No. 4835141 Specification, Japanese Patent No. 5119623 Specification, Japanese Laid Open Patent No. 2009-23341, Japanese Patent No. 2976955 Specification, Japanese Laid Open Patent No. 2003-243396, Japanese Laid Open Patent No. 2003-198069 and Japanese Patent No. 4012375 Specification) are conventional technologies of a through-hole electrode substrate. 
         [0005]    In the through-hole electrode, a conductive material is filled into a through-hole as a filler as described above, or a conductive film is formed along the side wall of the through-hole and an insulating resin is filled to the remainder of the through-hole. In the through-hole electrode, a technique is known in which the interior of the through-hole is provided with a taper or a plurality of crater shaped irregularities is formed inside the through-hole in order to prevent dropout of a filler filled in the through-hole (see, for example, Japanese Patent Application No. 2003-513037 and Japanese Patent Application No. 2011-528851). 
         [0006]    However, even when attempting to prevent dropout of the filler by such a technique, a gap is generated between the filler and the side wall of the through-hole and a gas reservoir may be generated. When heat is applied to the substrate in this state, in the prior art there is a possibility that gas which has collected into a gas reservoir expands causing destruction of the through-hole or filler which causes defects such as dropout of the filler. 
         [0007]    Therefore, the embodiment of the invention has been made in view of such problems and provides a through-hole electrode substrate and semiconductor device which can eliminate defects due to gas collecting in a gas reservoir in a through-hole and allows prevention of dropout of a filler from within the through-hole. 
       SUMMARY 
       [0008]    According to one embodiment of the embodiment of the invention, a through-hole electrode substrate is provided including a substrate including a through-hole extending from a first aperture of a first surface to a second aperture of a second surface, an area of the second aperture being larger than that of the first aperture, the through-hole having a minimum aperture part between the first aperture and the second aperture, wherein an area of the minimum aperture part in a planer view is smallest among a plurality of areas of the through-hole in a planer view, a filler arranged within the through-hole, and at least one gas discharge member contacting the filler exposed to one of the first surface and the second surface. 
         [0009]    According to one embodiment of the embodiment of the invention, a through-hole electrode substrate is provided including a substrate including a through-hole extending from a first aperture of a first surface to a second aperture of a second surface, and including a first part and a second part, the second part having a larger area in a planar view than the first part and the first aperture, a filler arranged within the through-hole, and a gas discharge member contacting the filler exposed to one of the first surface and the second surface. 
         [0010]    In addition, at least a part of a side wall of the through-hole in a cross-sectional view may include a curve having an inflection point. 
         [0011]    The gas discharge member may be an insulation resin configured to discharge gas within the through-hole to the exterior. 
         [0012]    At least a part of the gas discharge member may also be arranged between a side wall of the through-hole and the filler. 
         [0013]    The gas discharge member may include an aperture having an area increasing in size in a planar view as the aperture separates from the substrate. 
         [0014]    A conductive film may be arranged between a side wall of the through-hole and the filler. 
         [0015]    An insulation film and a conductive film may be arranged in sequence from a side wall side of the through-hole between a side wall of the through-hole and the filler. 
         [0016]    The conductive film may also be arranged on the first surface and on the second surface. 
         [0017]    The filler may be a conductive material. 
         [0018]    The filler may be an insulation material. 
         [0019]    The substrate may have insulation properties. 
         [0020]    The substrate may have conductive properties. 
         [0021]    The gas discharge member may include an aperture overlapping the first aperture and the second aperture. 
         [0022]    The gas discharge member may include an aperture not overlapping the first aperture and the second aperture. 
         [0023]    The plurality of gas discharge members may be arranged, one of the plurality of gas discharge members is arranged on the first surface and in contact with a first part of the filler exposed to the first surface, one of the plurality of gas discharge members is arranged on the second surface and in contact with a second part of the filler exposed to the second surface, second part of the filler is larger than an area of the gas discharge member in contact with the first part of the filler. 
         [0024]    In addition, according to one embodiment of the embodiment of the invention, a semiconductor device including a through-hole electrode substrate, an LSI substrate and a semiconductor chip. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0025]      FIG. 1  is a diagram showing a structure of a through-hole electrode substrate  100  of the embodiment of the invention related to a first embodiment; 
           [0026]      FIG. 2  is a diagram showing a structure of a through-hole electrode substrate  200  of the embodiment of the invention related to a second embodiment; 
           [0027]      FIG. 3  is a diagram showing a structure of a through-hole electrode substrate  300  of the embodiment of the invention related to a third embodiment; 
           [0028]      FIG. 4  is a diagram showing a structure of a through-hole electrode substrate  400  of the embodiment of the invention related to a fourth embodiment; 
           [0029]      FIG. 5A  is a diagram showing a structure of the through-hole electrode substrate  100  of the embodiment of the invention related to a fifth embodiment; 
           [0030]      FIG. 5B  is a diagram showing a structure of the through-hole electrode substrate  100  of the embodiment of the invention related to a fifth embodiment; 
           [0031]      FIG. 6  is a diagram showing a structure of the through-hole electrode substrate  100  of the embodiment of the invention related to a sixth embodiment; 
           [0032]      FIG. 7  is a diagram showing a structure of the through-hole electrode substrate  100  of the embodiment of the invention related to a seventh embodiment; 
           [0033]      FIG. 8A  shows an example in which an aperture (via)  110  of a filler  105  is misaligned in the through-hole electrode substrate  100  of the embodiment of the invention related to the seventh embodiment; 
           [0034]      FIG. 8B  shows an example in which an aperture (via)  110  of a filler  105  is misaligned in the through-hole electrode substrate  100  of the embodiment of the invention related to the seventh embodiment; 
           [0035]      FIG. 9  is a diagram showing a structure of the through-hole electrode substrate  300  of the embodiment of the invention related to the seventh embodiment; 
           [0036]      FIG. 10  is a diagram showing a structure of the through-hole electrode substrate  300  of the embodiment of the invention related to the seventh embodiment; 
           [0037]      FIG. 11  is a diagram showing a structure of the through-hole electrode substrate  400  of the embodiment of the invention related to the seventh embodiment; 
           [0038]      FIG. 12  is a diagram showing a structure of a through-hole electrode substrate  1000  of the embodiment of the invention related to an eighth embodiment; 
           [0039]      FIG. 13  is a diagram showing a structure of the through-hole electrode substrate  1000  of the embodiment of the invention related to the eighth embodiment; and 
           [0040]      FIG. 14  is a diagram showing a structure of the through-hole electrode substrate  1000  of the embodiment of the invention related to the eighth embodiment. 
       
    
    
     REFERENCE SIGNS LIST 
       [0041]      100 ,  200 ,  300 ,  400 : through-hole electrode substrate,  102 ,  202 ,  302 ,  402 : substrate,  104 ,  204 ,  304 ,  404 : through-hole,  105 ,  205 ,  305 ,  405 : filler,  106 , 108 ,  206 ,  208 ,  306 ,  308 ,  406 ,  408 : insulation layer,  207 ,  409 : conductive film,  307 ,  407 : insulation layer,  110 ,  112 ,  210 ,  212 ,  310 ,  312 ,  410 ,  412 : via (aperture) 
       DESCRIPTION OF EMBODIMENTS 
       [0042]    A through-hole electrode substrate of the embodiment of the invention is explained in detail below while referring to the diagrams. The through-hole electrode substrate of the embodiment of the invention is not limited to the embodiments below and various modifications are possible. In all of the embodiments, the same symbols are attached to the same structural elements and explained. 
       First Embodiment 
       [0043]    The structure of a through-hole electrode substrate  100  of the embodiment of the invention related to the present embodiment is explained while referring to  FIG. 1 .  FIG. 1  (A) is a planar diagram of the through-hole electrode substrate  100  of the embodiment of the invention related to the present embodiment seen from the upper surface.  FIG. 1  (B) is a cross-sectional diagram of the line A˜A′ in  FIG. 1  (A). Both  FIGS. 1  (A) and (B) show a part of the through-hole electrode substrate  100  of the embodiment of the invention related to the present embodiment for the convenience of explanation. 
         [0044]    The through-hole electrode substrate  100  of the embodiment of the invention related to the present embodiment is arranged with a substrate  102 , a through-hole  104 , a filler  105 , insulation layers  106  and  108 , and via&#39;s  110  and  112 . Furthermore, a wiring structure body and electronic components and the like may also be further mounted respectively on a first surface  102   a  and second surface  102   b  side of the substrate  102 . 
         [0045]    In the present embodiment, the substrate  102  includes insulation properties, for example it is possible to use glass, sapphire or resin and the like. Although there is no particular limitation to the thickness of the substrate  102 , it is possible to appropriately set the thickness to a range of 10 μm˜1 mm for example. 
         [0046]    The through-hole  104  is a through-hole which passes through a first aperture  104   a  arranged in the first surface  102   a  of the substrate and a second aperture  104   b  arranged in the second surface  102   b  which is the opposite side surface to the first surface  102   a . The shape of the through-hole  104  is not constant and changes from the first aperture  104   a  towards the second aperture  104   b . In other words, the shape of the side wall of the through-hole  104  is not constant and changes from the first aperture  104   a  towards the second aperture  104   b . Typically, the second aperture  104   b  is larger than the first aperture  104   a  and the through-hole  104  includes a narrow part between the first aperture  104   a  and second aperture  104   b . More specifically, the through-hole  104  includes a minimum aperture part  104   c  having a minimum area M in a planar view (that is, seen from the upper surface), an inflection point  104   d  (curved line including the inflection point  104   d ) at which a side wall of the through-hole  104  changes according to a curved line in a cross-sectional view (that is, seen along the cross-section A˜A′), and a maximum aperture part  104   e  having a maximum area L in a planar view (that is, seen from the upper surface). In the present embodiment, although the inflection point  104   d  of the through-hole  104  is arranged nearer to the second aperture  104   b  than the center of the through-hole  104 , the present embodiment is not limited to this and the inflection point  104   d  of the through-hole  104  may also be arranged nearer to the first aperture  104   a  than the center of the through-hole  104 . Furthermore, it is possible to form the through-hole  104  by performing an etching process, laser process and sandblast process of the substrate  102 . Although there is no particular limitation to the size of the through-hole  104 , it is preferred that the size of the maximum aperture part  104   e  is set to 200 μm or less in order to realize a narrow pitch. 
         [0047]    The filler  105  is arranged within the through-hole  104 . In the present embodiment, the filler  105  is a material with conductive properties, for example, a metal deposit such as Cu, a conductive paste including Cu, and a conductive material such as a conductive resin can be used. An electrolytic plating filler method is used in the case where a metal such as Cu is used as the filler  105 . In the case where a conductive paste having fluidity is used as the filler  105  or a conductive resin is used as the material, it is possible to fill the through-hole  104  with a conductive paste or conductive resin using a spatula or scriber and subsequently form the filler  105  by performing a heating process or the like. 
         [0048]    The insulation layers  106  and  108  are respectively arranged directly or via an intermediate layer (not shown in the diagram) above the first surface  102   a  and second surface  102   b  of the substrate  102 . The insulation layers  106  and  108  are formed from a resin material with insulation properties such as polyimide or benzocyclobutene for example, and may be an insulator having a gas discharge function. The insulation layers  106  and  108  work as a gas discharge member by discharging (allowing gas to pass through) gas generated and discharged within the through-hole  104  to the exterior. At least one of the insulation layers (gas discharge member)  106  and  108  is arranged so as to contact the filler  105  exposed to the first surface  102   a  and second surface  102   b  of the substrate  102 . In addition, in the case where a gap exists between the side wall of the through-hole  104  and the filler  105 , a part of the insulation layers (gas discharge member)  106  and  108  may be arranged between the side wall of the through-hole  104  and the filler  105 , that is, the insulation layers  106  and  108  may enter between the side wall of the through-hole  104  and the filler  105 . The insulation layers  106  and  108  are formed by a desired patterning using photolithography using a photosensitive material with insulation properties for example. 
         [0049]    In the through-hole electrode substrate  100  of the embodiment of the invention related to the present embodiment, as described above, the through-hole  104  includes a minimum aperture part  104   c , inflection point  104   d  and maximum aperture part  104   e . In addition, the filler  105  is filled into the through-hole  104 . In the case shown in  FIG. 1 , there is a larger amount of the filler  105  in the part of the through-hole  104  on the second surface  102   b  side than the part of the through-hole  104  on the first surface  102   a  side and due to this the amount of gas which is discharged increases. The area where the gas discharge member  108  of the second surface  102   b  side contacts the filler  105  increases more than the area where the gas discharge member  106  of the first surface  102   a  side contacts the filler  105 , and the amount of gas discharged from the gas discharge member  108  of the second surface side may be set to increase. Furthermore, since the second aperture  104   b  is larger than the first aperture  104   a , it is possible to easily obtain the contact surface relationship described above by setting the diameter of the via  110  and via  112  roughly the same. 
         [0050]    The via  110  and via  112  which are apertures, are holes formed respectively in the insulation layers (gas discharge members)  106  and  108 . Although not shown in the diagram for the convenience of explanation, wiring is formed in the via  110  and  112  by plating or sputtering. This wiring contacts with the filler  105  arranged within the through-hole  104  and the wiring conducts with each other. As is shown in  FIG. 1  (B), the via  110  and  112  which are apertures in the insulation layers (gas discharge member)  106  and  108  are formed respectively overlapping a first aperture and a second aperture of the substrate  102 . In other words, the via  110  and  112  which are apertures in the insulation layers (gas discharge member)  106  and  108  are respectively arranged directly above the first aperture and second aperture of the substrate  102 . In addition, a part of the via  110  and/or the via  112  which are apertures in the insulation layers (gas discharge member)  106  and  108  may be formed so as to overlap the first aperture  104   a  and second aperture  104   b  of the substrate  102  respectively. 
         [0051]    In the through-hole electrode substrate  100  of the embodiment of the invention related to the present embodiment, as described above, the through-hole  104  includes a minimum aperture part  104   c , inflection point  104   d  and maximum aperture part  104   e . In addition, the filler  105  is filled into the through-hole  104 . It is possible to secure filler properties of the filler by making the size of the first aperture  104   a  and second aperture  104   b  different. In addition, in the case where a force is applied to the filler  105  in the direction of the first surface  102   a , it is possible to prevent the filler  105  from dropping out of the substrate  102  due to the presence of the inflection point  104   d . In addition, in the case where a force is applied to the filler  105  in the direction of the second surface  102   b , it is possible to prevent the filler  105  from dropping out of the substrate  102  due to the presence of the minimum aperture part  104   c . Furthermore, the through-hole electrode substrate  100  related to the present embodiment may include both or only one of either the minimum aperture part  104   c  and maximum aperture part  104   e . Therefore, in the through-hole electrode substrate  100  of the embodiment of the invention related to the present embodiment, it is possible to secure filler properties of the filler  105  and prevent the filler  105  from dropping in either an upwards or downwards direction. 
         [0052]    In addition, in the through-hole electrode substrate  100  of the embodiment of the invention related to the present embodiment, as described above, at least one of the insulation layers (gas discharge member)  106  and  108  is arranged so as to contact with the filler  105  exposed to the first surface  102   a  and second surface  102   b  of the substrate  102 . Therefore, it is possible for the insulation layer (gas discharge member)  106  and/or  108  to discharge gas generated and discharged within the through-hole  104  to the exterior, remove defects caused by accumulated gas in a gas reservoir within the through-hole  104 , it is possible to prevent the filler  105  from dropping out from the through-hole  104 , and it is possible to provide a through-hole electrode substrate with a high level of reliability. 
         [0053]    Furthermore, although it preferred that there is no gap between the side wall of the through-hole  104  and the filler  105 , a slight gap or interval may be produced between the side wall of the through-hole  104  and the filler  105 . Even in the case where this type of gap or interval is produced, it is possible to prevent the filler  105  from dropping out in the through-hole electrode substrate  100  of the embodiment of the invention related to the present embodiment. 
       Second Embodiment 
       [0054]    The structure of a through-hole electrode substrate  200  of the embodiment of the invention related to the present embodiment is explained while referring to  FIG. 2 .  FIG. 2  (A) is a planar diagram of the through-hole electrode substrate  200  of the embodiment of the invention related to the present embodiment seen from the upper surface.  FIG. 2  (B) is a cross-sectional diagram of the line A˜A′ in  FIG. 2  (A). Both  FIGS. 2  (A) and (B) show a part of the through-hole electrode substrate  200  of the embodiment of the invention related to the present embodiment for the convenience of explanation. 
         [0055]    The through-hole electrode substrate  200  of the embodiment of the invention related to the present embodiment is arranged with a substrate  202 , a through-hole  204 , a filler  205 , insulation layers  206  and  208 , and via&#39;s  210  and  212 . Furthermore, a wiring structure body and electronic components and the like may also be further mounted respectively on a first surface  202   a  and second surface  202   b  side of the substrate  202 . 
         [0056]    In the present embodiment, the substrate  202  includes insulation properties, for example it is possible to use glass, sapphire or resin and the like. Although there is no particular limitation to the thickness of the substrate  202 , it is possible to appropriately set the thickness to a range of 10 μm˜1 mm for example. 
         [0057]    The through-hole  204  is a through-hole which passes through a first aperture  204   a  arranged in the first surface  202   a  of the substrate  202  and a second aperture  204   b  arranged in the second surface  202   b  which is the opposite side surface to the first surface  202   a . The shape of the through-hole  204  is not constant and changes from the first aperture  204   a  towards the second aperture  204   b  the same as in the first embodiment described above. In other words, the shape of the side wall of the through-hole  204  is not constant and changes from the first aperture  204   a  towards the second aperture  204   b . Typically, the second aperture  204   b  is larger than the first aperture  204   a  and the through-hole  204  includes a narrow part between the first aperture  204   a  and second aperture  204   b . More specifically, the through-hole  204  includes a minimum aperture part  204   c  having a minimum area M in a planar view (that is, seen from the upper surface), an inflection point  204   d  (curved line including the inflection point  204   d ) at which a side wall of the through-hole  204  changes according to a curved line in a cross-sectional view (that is, seen along the cross-section A˜A′), and a maximum aperture part  204   e  having a maximum area L in a planar view (that is, seen from the upper surface). In the present embodiment, although the inflection point  204   d  of the through-hole  204  is arranged nearer to the second aperture  204   b  than the center of the through-hole  204 , the present embodiment is not limited to this and the inflection point  204   d  of the through-hole  204  may also be arranged nearer to the first aperture  204   a  than the center of the through-hole  204 . Furthermore, it is possible to form the through-hole  204  by performing an etching process, laser process and sandblast process of the substrate  202 . Although there is no particular limitation to the size of the through-hole  204 , it is preferred that the size of the maximum aperture part  204   e  is set to 200 μm or less in order to realize a narrow pitch. 
         [0058]    A conductive film  207  and the filler  205  are arranged within the through-hole  204 . The conductive film  207  is arranged on the side wall side of the through-hole  204  and a part of the conductive film  207  is arranged on an upper part of the first surface  202   a  and second surface  202   b . In the present embodiment, the filler  205  is a material with insulation properties, for example, an organic material such as polyimide or benzocyclobutene or an inorganic material such as silicon oxide or silicon nitride is used. The conductive film  207  can be formed using a plating method or CVD method for example. The filler  205  can be formed using a method such as absorption or pushing method. 
         [0059]    The insulation layers  206  and  208  are respectively arranged directly or via an intermediate layer (not shown in the diagram) above the first surface  202   a  and second surface  202   b  of the substrate  202 . The insulation layers  206  and  208  are formed from a resin material with insulation properties such as polyimide or benzocyclobutene for example, and may be an insulator having a gas discharge function. The insulation layers  206  and  208  work as a gas discharge member by discharging (allowing gas to pass through) gas generated and discharged within the through-hole  204  to the exterior. In the present embodiment, the insulation layers (gas discharge member)  206  and  208  are arranged so as to cover and contact the filler  205  which is exposed to the first surface  202   a  and second surface  202   b  of the substrate  202 . At least one of the insulation layers (gas discharge member)  206  and  208  is arranged so as to contact the filler  205  exposed to the first surface  202   a  and second surface  202   b  of the substrate  202 . In addition, in the case where a gap exists between the side wall of the through-hole  204  and the filler  205 , a part of the insulation layers (gas discharge member)  206  and  208  may be arranged between the side wall of the through-hole  204  and the filler  205 , that is, the insulation layers  206  and  208  may enter between the side wall of the through-hole  204  and the filler  205 . The insulation layers  206  and  208  are formed by a desired patterning using photolithography using a photosensitive material with insulation properties for example. 
         [0060]    In the through-hole electrode substrate  200  of the embodiment of the invention related to the present embodiment, as described above, the through-hole  204  includes a minimum aperture part  204   c , inflection point  204   d  and maximum aperture part  204   e . In addition, the filler  205  is filled into the through-hole  204 . In the case shown in  FIG. 2 , there is a larger amount of the filler  205  in the part of the through-hole  204  on the second surface  202   b  side than the part of the through-hole  204  on the first surface  202   a  side and due to this the amount of gas which is discharged increases. Therefore, the area where the gas discharge member  208  of the second surface  202   b  side contacts the filler  205  increases more than the area where the gas discharge member  206  of the first surface  202   a  side contacts the filler  205 , and the amount of gas discharged from the gas discharge member  208  of the second surface side may be set to increase. 
         [0061]    The via  210  and via  212  which are apertures, are holes formed respectively in the insulation layers (gas discharge members)  206  and  208  above the conductive film  207  above the first surface  202   a  and second surface  202   b . Although not shown in the diagram for the convenience of explanation, wiring is formed in the via  210  and  212  by plating or sputtering. This wiring contacts with the conductive film  207  above the first surface  202   a  and above the second surface  202   b  and the wiring conducts with each other. In addition, a part of the via  210  and/or the via  212  which are apertures in the insulation layers (gas discharge member)  206  and  208  may be formed so as to overlap the first aperture  204   a  and second aperture  204   b  of the substrate  202  respectively. 
         [0062]    In the through-hole electrode substrate  200  of the embodiment of the invention related to the present embodiment, as described above, the through-hole  204  includes a minimum aperture part  204   c , inflection point  204   d  and maximum aperture part  204   e . In addition, the filler  205  is filled into the through-hole  204 . It is possible to secure filler properties of the filler by making the size of the first aperture  204   a  and second aperture  204   b  different. In addition, in the case where a force is applied to the filler  205  in the direction of the first surface  202   a , it is possible to prevent the filler  205  from dropping out of the substrate  202  due to the presence of the inflection point  204   d . In addition, in the case where a force is applied to the filler  205  in the direction of the second surface  202   b , it is possible to prevent the filler  205  from dropping out of the substrate  202  due to the presence of the minimum aperture part  204   c . Furthermore, the through-hole electrode substrate  200  related to the present embodiment may include both or only one of either the minimum aperture part  204   c  and maximum aperture part  204   e . Therefore, in the through-hole electrode substrate  200  of the embodiment of the invention related to the present embodiment, it is possible to secure filler properties of the filler  205  and prevent the filler  205  from dropping in either an upwards or downwards direction. 
         [0063]    In addition, in the through-hole electrode substrate  200  of the embodiment of the invention related to the present embodiment, as described above, at least one of the insulation layers (gas discharge member)  206  and  208  is arranged so as to contact with the filler  205  exposed to the first surface  202   a  and second surface  202   b  of the substrate  202 . Therefore, it is possible for the insulation layer (gas discharge member)  206  and/or  208  to discharge gas generated and discharged within the through-hole  204  to the exterior, remove defects caused by accumulated gas in a gas reservoir within the through-hole  204 , it is possible to prevent the filler  205  from dropping out from the through-hole  204 , and it is possible to provide a through-hole electrode substrate with a high level of reliability. 
         [0064]    Furthermore, although it preferred that there is no gap between the conductive film  207  arranged in the side wall of the through-hole  204  and the filler  205 , a slight gap or interval may be produced between conductive film  207  and the filler  205 . Even in the case where this type of gap or interval is produced, it is possible to prevent the filler  205  from dropping out in the through-hole electrode substrate  200  of the embodiment of the invention related to the present embodiment. 
       Third Embodiment 
       [0065]    The structure of a through-hole electrode substrate  300  of the embodiment of the invention related to the present embodiment is explained while referring to  FIG. 3 .  FIG. 3  (A) is a planar diagram of the through-hole electrode substrate  300  of the embodiment of the invention related to the present embodiment seen from the upper surface.  FIG. 3  (B) is a cross-sectional diagram of the line A˜A′ in  FIG. 3  (A). Both  FIGS. 3  (A) and (B) show a part of the through-hole electrode substrate  300  of the embodiment of the invention related to the present embodiment for the convenience of explanation. 
         [0066]    The through-hole electrode substrate  300  of the embodiment of the invention related to the present embodiment is arranged with a substrate  302 , a through-hole  304 , a filler  305 , insulation layers  306  and  308 , and via&#39;s  310  and  312 . Furthermore, a wiring structure body and electronic components and the like may also be further mounted respectively on a first surface  302   a  and second surface  302   b  side of the substrate  302 . 
         [0067]    In the present embodiment, the substrate  302  includes conductive properties, for example it is possible to use a silicon semiconductor or metal such as stainless steel and the like. Although there is no particular limitation to the thickness of the substrate  302 , it is possible to appropriately set the thickness to a range of 10 μm˜1 mm for example. 
         [0068]    The through-hole  304  is a through-hole which passes through a first aperture  304   a  arranged in the first surface  302   a  of the substrate  302  and a second aperture  304   b  arranged in the second surface  302   b  which is the opposite side surface to the first surface  302   a  the same as in the first and second embodiments described above. The shape of the through-hole  304  is not constant and changes from the first aperture  304   a  towards the second aperture  304   b . In other words, the shape of the side wall of the through-hole  304  is not constant and changes from the first aperture  304   a  towards the second aperture  304   b . Typically, the second aperture  304   b  is larger than the first aperture  304   a  and the through-hole  304  includes a narrow part between the first aperture  304   a  and second aperture  304   b . More specifically, the through-hole  304  includes a minimum aperture part  304   c  having a minimum area M in a planar view (that is, seen from the upper surface), an inflection point  304   d  (curved line including the inflection point  304   d ) at which a side wall of the through-hole  304  changes according to a curved line in a cross-sectional view (that is, seen along the cross-section A˜A′), and a maximum aperture part  304   e  having a maximum area L in a planar view (that is, seen from the upper surface). In the present embodiment, although the inflection point  304   d  of the through-hole  304  is arranged nearer to the second aperture  304   b  than the center of the through-hole  304 , the present embodiment is not limited to this and the inflection point  304   d  of the through-hole  304  may also be arranged nearer to the first aperture  304   a  than the center of the through-hole  304 . Furthermore, it is possible to form the through-hole  304  by performing an etching process, laser process and sandblast process of the substrate  302 . Although there is no particular limitation to the size of the through-hole  304 , it is preferred that the size of the maximum aperture part  304   e  is set to 200 μm or less in order to realize a narrow pitch. 
         [0069]    The insulation layer  307  and the filler  305  are arranged within the through-hole  304 . The insulation layer  307  is arranged on the side wall side of the through-hole  304  and a part of the insulation layer  307  is arranged on an upper part of the first surface and second surface of the substrate  302 . In the present embodiment, the filler  305  is a material with conductive properties, for example, a metal deposit such as Cu, a conductive paste including Cu, and a conductive material such as a conductive resin can be used. An electrolytic plating filler method is used in the case where a metal such as Cu is used as the filler  305 . In the case where a conductive paste having fluidity is used as the filler  305  or a conductive resin is used as the material, it is possible to fill the through-hole  304  with a conductive paste or conductive resin using a spatula or scriber and subsequently form the filler  305  by performing a heating process or the like. 
         [0070]    The insulation layers  306  and  308  are respectively arranged directly or via an intermediate layer (not shown in the diagram) above the first surface  302   a  and second surface  302   b  of the substrate  302 . The insulation layers  306  and  308  are formed from a resin material with insulation properties such as polyimide or benzocyclobutene for example, and may be an insulator having a gas discharge function. The insulation layers  306  and  308  work as a gas discharge member by discharging (allowing gas to pass through) gas generated and discharged within the through-hole  304  to the exterior. At least one of the insulation layers (gas discharge member)  306  and  308  is arranged so as to contact the filler  305  exposed to the first surface and second surface of the substrate  302 . In addition, in the case where a gap exists between the side wall of the through-hole  304  and the filler  305 , a part of the insulation layers (gas discharge member)  306  and  308  may be arranged between the side wall of the through-hole  304  and the filler  305 , that is, the insulation layers  306  and  308  may enter between the side wall of the through-hole  304  and the filler  305 . The insulation layers  306  and  308  are formed by a desired patterning using photolithography using a photosensitive material with insulation properties for example. 
         [0071]    In the through-hole electrode substrate  300  of the embodiment of the invention related to the present embodiment, as described above, the through-hole  304  includes a minimum aperture part  304   c , inflection point  304   d  and maximum aperture part  304   e . In addition, the filler  305  is filled into the through-hole  304 . In the case shown in  FIG. 3 , there is a larger amount of the filler  305  in the part of the through-hole  304  on the second surface  302   b  side than the part of the through-hole  304  on the first surface  302   a  side and due to this the amount of gas which is discharged increases. Therefore, the area where the gas discharge member  308  of the second surface side contacts the filler  305  increases more than the area where the gas discharge member  306  of the first surface  302   a  side contacts the filler  305 , and the amount of gas discharged from the gas discharge member  308  of the second surface  302   b  side may be set to increase. Furthermore, since the second aperture  304   b  is larger than the first aperture  304   a , it is possible to easily obtain the contact surface relationship described above by setting the diameter of the via  310  and via  312  roughly the same. 
         [0072]    The via  310  and via  312  which are apertures, are holes formed respectively in the insulation layers (gas discharge members)  306  and  308 . Although not shown in the diagram for the convenience of explanation, wiring is formed in the via  310  and  312  by plating or sputtering. This wiring contacts with the filler  305  arranged within the through-hole  304  and the wiring conducts with each other. As is shown in  FIG. 3  (B), the via  310  and  312  which are apertures in the insulation layers (gas discharge member)  306  and  308  are formed respectively overlapping the first aperture  304   a  and the second aperture  304   b  of the substrate  302 . In other words, the via  310  and  312  which are apertures in the insulation layers (gas discharge member)  306  and  308  are respectively arranged directly above the first aperture  304   a  and second aperture  304   b  of the substrate  302 . In addition, a part of the via  310  and/or the via  312  which are apertures in the insulation layers (gas discharge member)  306  and  308  may be formed so as to overlap the first aperture  304   a  and second aperture  304   b  of the substrate  302  respectively. 
         [0073]    In the through-hole electrode substrate  300  of the embodiment of the invention related to the present embodiment, as described above, the through-hole  304  includes a minimum aperture part  304   c , inflection point  304   d  and maximum aperture part  304   e . In addition, the filler  305  is filled into the through-hole  304 . It is possible to secure filler properties of the filler by making the size of the first aperture  304   a  and second aperture  304   b  different. In addition, in the case where a force is applied to the filler  305  in the direction of the first surface  302   a , it is possible to prevent the filler  305  from dropping out of the substrate  302  due to the presence of the inflection point  304   d . In addition, in the case where a force is applied to the filler  305  in the direction of the second surface  302   b , it is possible to prevent the filler  305  from dropping out of the substrate  302  due to the presence of the minimum aperture part  304   c . Furthermore, the through-hole electrode substrate  300  related to the present embodiment may include both or only one of either the minimum aperture part  304   c  and maximum aperture part  304   e . Therefore, in the through-hole electrode substrate  300  of the embodiment of the invention related to the present embodiment, it is possible to secure filler properties of the filler  305  and prevent the filler  305  from dropping in either an upwards or downwards direction. 
         [0074]    In addition, in the through-hole electrode substrate  300  of the embodiment of the invention related to the present embodiment, as described above, at least one of the insulation layers (gas discharge member)  306  and  308  is arranged so as to contact with the filler  305  exposed to the first surface  302   a  and second surface  302   b  of the substrate  302 . Therefore, it is possible for the insulation layer (gas discharge member)  306  and/or  308  to discharge gas generated and discharged within the through-hole  304  to the exterior, remove defects caused by accumulated gas in a gas reservoir within the through-hole  304 , it is possible to prevent the filler  305  from dropping out from the through-hole  304 , and it is possible to provide a through-hole electrode substrate with a high level of reliability. 
         [0075]    Furthermore, although it preferred that there is no gap between the insulation layer  307  arranged in the side wall of the through-hole  304  and the filler  305 , a slight gap or interval may be produced between the insulation layer  307  and the filler  305 . Even in the case where this type of gap or interval is produced, it is possible to prevent the filler  305  from dropping out in the through-hole electrode substrate  300  of the embodiment of the invention related to the present embodiment. 
       Fourth Embodiment 
       [0076]    The structure of a through-hole electrode substrate  400  of the embodiment of the invention related to the present embodiment is explained while referring to  FIG. 4 .  FIG. 4  (A) is a planar diagram of the through-hole electrode substrate  400  of the embodiment of the invention related to the present embodiment seen from the upper surface.  FIG. 4  (B) is a cross-sectional diagram of the line A˜A′ in  FIG. 4  (A). Both  FIGS. 4  (A) and (B) show a part of the through-hole electrode substrate  400  of the embodiment of the invention related to the present embodiment for the convenience of explanation. 
         [0077]    The through-hole electrode substrate  400  of the embodiment of the invention related to the present embodiment is arranged with a substrate  402 , a through-hole  404 , a filler  405 , insulation layers  406  and  408 , insulation film  407 , a conductive film  409 , and via&#39;s  410  and  412 . Furthermore, a wiring structure body and electronic components and the like may also be further mounted respectively on a first surface  402   a  and second surface  402   b  side of the substrate  402 . 
         [0078]    In the present embodiment, the substrate  402  includes conductive properties, for example it is possible to use a silicon semiconductor or metal such as stainless steel and the like. Although there is no particular limitation to the thickness of the substrate  402 , it is possible to appropriately set the thickness to a range of 10 μm˜1 mm for example. 
         [0079]    The through-hole  404  is a through-hole which passes through a first aperture  404   a  arranged in the first surface  402   a  of the substrate  402  and a second aperture  404   b  arranged in the second surface  402   b  which is the opposite side surface to the first surface  402   a . The shape of the through-hole  404  is not constant and changes from the first aperture  404   a  towards the second aperture  404   b  the same as the first to third embodiments described above. In other words, the shape of the side wall of the through-hole  404  is not constant and changes from the first aperture  404   a  towards the second aperture  404   b . Typically, the second aperture  404   b  is larger than the first aperture  404   a  and the through-hole  404  includes a narrow part between the first aperture  404   a  and second aperture  404   b . More specifically, the through-hole  404  includes a minimum aperture part  404   c  having a minimum area M in a planar view (that is, seen from the upper surface), an inflection point  404   d  (curved line including the inflection point  404   d ) at which a side wall of the through-hole  404  changes according to a curved line in a cross-sectional view (that is, seen along the cross-section A˜A′), and a maximum aperture part  404   e  having a maximum area L in a planar view (that is, seen from the upper surface). In the present embodiment, although the inflection point  404   d  of the through-hole  404  is arranged nearer to the second aperture  404   b  than the center of the through-hole  404 , the present embodiment is not limited to this and the inflection point  404   d  of the through-hole  404  may also be arranged nearer to the first aperture  404   a  than the center of the through-hole  404 . Furthermore, it is possible to form the through-hole  404  by performing an etching process, laser process and sandblast process of the substrate  402 . Although there is no particular limitation to the size of the through-hole  404 , it is preferred that the size of the maximum aperture part  404   e  is set to 200 μm or less in order to realize a narrow pitch. 
         [0080]    An insulation layer  407 , conductive film  409  and the filler  405  are arranged within the through-hole  404 . The insulation layer  407  is arranged on the side wall side of the through-hole  404 , and a part of the insulation layer  407  is arranged on an upper part of the first surface and second surface of the substrate  402 . The conductive film  409  is arranged on the insulation layer  407  side of the through-hole  404  and a part of the conductive film  409  is arranged on an upper part of the first surface and second surface of the substrate  402 . In the present embodiment, the filler  405  is a material with insulation properties, for example, an organic material such as polyimide or benzocyclobutene or an inorganic material such as silicon oxide or silicon nitride is used. The conductive film  409  can be formed using a plating method or CVD method for example. The filler  405  can be formed using a method such as absorption or pushing method. 
         [0081]    The insulation layers  406  and  408  are respectively arranged directly or via an intermediate layer (not shown in the diagram) above the first surface  402   a  and second surface  402   b  of the substrate  402 . The insulation layers  406  and  408  are formed from a resin material with insulation properties such as polyimide and may be an insulator having a gas discharge function. The insulation layers  406  and  408  work as a gas discharge member by discharging (allowing gas to pass through) gas generated and discharged within the through-hole  404  to the exterior. In the present embodiment, the insulation layers (gas discharge member)  406  and  408  are arranged to cover and contact the filler  405  exposed to the first surface and second surface of the substrate  402 . At least one of the insulation layers (gas discharge member)  406  and  408  is arranged so as to contact the filler  405  exposed to the first surface  402   a  and second surface  402   b  of the substrate  402 . In addition, in the case where a gap exists between the side wall of the through-hole  404  and the filler  405 , a part of the insulation layers (gas discharge member)  406  and  408  may be arranged between the side wall of the through-hole  404  and/or the insulation layer  407  and the filler  405 , that is, the insulation layers  406  and  408  may enter between the side wall of the through-hole  404  and the filler  405 . The insulation layers  406  and  408  are formed by a desired patterning using photolithography using a photosensitive material with insulation properties for example. 
         [0082]    In the through-hole electrode substrate  400  of the embodiment of the invention related to the present embodiment, as described above, the through-hole  404  includes a minimum aperture part  404   c , inflection point  404   d  and maximum aperture part  404   e . In addition, the filler  405  is filled into the through-hole  404 . In the case shown in  FIG. 4 , there is a larger amount of the filler  405  in the part of the through-hole  404  on the second surface  402   b  side than the part of the through-hole  404  on the first surface  402   a  side and due to this the amount of gas which is discharged increases. Therefore, the area where the gas discharge member  408  of the second surface  402   b  side contacts the filler  405  increases more than the area where the gas discharge member  406  of the first surface  402   a  side contacts the filler  405 , and the amount of gas discharged from the gas discharge member  408  of the second surface side may be set to increase. Furthermore, since the second aperture  404   b  is larger than the first aperture  404   a , it is possible to easily obtain the contact surface relationship described above by setting the diameter of the via  410  and via  412  roughly the same. 
         [0083]    The via  410  and via  412  which are apertures, are holes formed respectively in the insulation layers (gas discharge members)  406  and  408  above the conductive film  409  above the first surface and second surface. Although not shown in the diagram for the convenience of explanation, wiring is formed in the via  410  and  412  by plating or sputtering. This wiring contacts with the conductive film  409  above the first surface  402   a  and above the second surface  402   b  and the wiring conducts with each other. In addition, a part of the via  410  and/or the via  412  which are apertures in the insulation layers (gas discharge member)  406  and  408  may be formed so as to overlap the first aperture  404   a  and second aperture  404   b  of the substrate  402  respectively. 
         [0084]    In the through-hole electrode substrate  400  of the embodiment of the invention related to the present embodiment, as described above, the through-hole  404  includes a minimum aperture part  404   c , inflection point  404   d  and maximum aperture part  404   e . In addition, the filler  405  is filled into the through-hole  404 . It is possible to secure filler properties of the filler by making the size of the first aperture  404   a  and second aperture  404   b  different. In addition, in the case where a force is applied to the filler  405  in the direction of the first surface  402   a , it is possible to prevent the filler  405  from dropping out of the substrate  402  due to the presence of the inflection point  404   d . In addition, in the case where a force is applied to the filler  405  in the direction of the second surface, it is possible to prevent the filler  405  from dropping out of the substrate  402  due to the presence of the minimum aperture part  404   c . Furthermore, the through-hole electrode substrate  400  related to the present embodiment may include both or only one of either the minimum aperture part  404   c  and maximum aperture part  404   e . Therefore, in the through-hole electrode substrate  400  of the embodiment of the invention related to the present embodiment, it is possible to secure filler properties of the filler  405  and prevent the filler  405  from dropping in either an upwards or downwards direction. 
         [0085]    In addition, in the through-hole electrode substrate  400  of the embodiment of the invention related to the present embodiment, as described above, at least one of the insulation layers (gas discharge member)  406  and  408  is arranged so as to contact with the filler  405  exposed to the first surface  402   a  and second surface  402   b  of the substrate  402 . Therefore, it is possible for the insulation layer (gas discharge member)  406  and/or  408  to discharge gas generated and discharged within the through-hole  404  to the exterior, remove defects caused by accumulated gas in a gas reservoir within the through-hole  404 , it is possible to prevent the filler  405  from dropping out from the through-hole  404 , and it is possible to provide a through-hole electrode substrate with a high level of reliability. 
         [0086]    Furthermore, although it preferred that there is no gap between the conductive film  409  arranged in the through-hole  404  and the filler  405 , a slight gap or interval may be produced between the conductive film  409  and the filler  405 . Even in the case where this type of gap or interval is produced, it is possible to prevent the filler  405  from dropping out in the through-hole electrode substrate  400  of the embodiment of the invention related to the present embodiment. 
       Fifth Embodiment 
       [0087]      FIG. 5A  is a cross-sectional diagram of the through-hole electrode substrate  100  of the embodiment of the invention related to the present embodiment. In addition,  FIG. 5B  is an expanded view diagram of the part  104   f  in  FIG. 5A . Furthermore, both  FIG. 5A  and  FIG. 5B  show a part of the through-hole electrode substrate  100  of the embodiment of the invention related to the present embodiment for the convenience of explanation. 
         [0088]    As is shown in  FIG. 5A , the through-hole electrode substrate  100  of the embodiment of the invention related to the present embodiment includes a connection part  104   f  with a first surface of the first aperture  101   a  of the through-hole  104  and the connection part  104   f  has a curved surface. In addition, a connection part  104   g  with a first surface of the first aperture  101   a  of the through-hole  104  has a curved surface. Since the remaining structure is the same as in the first embodiment, an explanation is omitted. 
         [0089]    Since the connection part  104   f  and connection part  104   g  of the through-hole  104  in the through-hole electrode substrate  100  of the embodiment of the invention related to the present embodiment include a curved surface, it is possible to easily fill the filler  405 . 
         [0090]    In addition, by providing a connection part with a first surface of a first aperture of a through-hole with a curved surface and by providing a connection part of a second surface of a second aperture of a through-hole with a curved surface, it is possible to adopt the same structure as the present embodiment in the first to fourth embodiments described above. 
       Sixth Embodiment 
       [0091]    The structure of the through-hole electrode substrate  100  of the embodiment of the invention related to the sixth embodiment is explained while referring to  FIG. 6 .  FIG. 6  (A) is a planar diagram of the through-hole electrode substrate  100  of the embodiment of the invention related to the present embodiment seen from the upper surface.  FIG. 6  (B) is a cross-sectional diagram of the line A˜A′ in  FIG. 6  (A). Both  FIGS. 6  (A) and (B) show a part of the through-hole electrode substrate  100  of the embodiment of the invention related to the present embodiment for the convenience of explanation. 
         [0092]    As is shown in  FIG. 5  (A), the through-hole electrode substrate  100  of the embodiment of the invention related to the present embodiment is arranged with the inflection point  104   d  of the through hole  104  nearer to the first aperture  104   a  than the center of the through-hole  104 . Since the remaining structure is the same as in the first embodiment, an explanation is omitted. 
         [0093]    In addition, by arranging an inflection point of a through-hole nearer a first aperture than the center of the through-hole, it is possible to adopt the same structure as the present embodiment in the first to fifth embodiments described above. 
       Seventh Embodiment 
       [0094]    The structure of the through-hole electrode substrate  100  of the embodiment of the invention related to the seventh embodiment is explained while referring to  FIG. 7 .  FIG. 7  (A) is a planar diagram of the through-hole electrode substrate  100  of the embodiment of the invention related to the present embodiment seen from the upper surface.  FIG. 7  (B) is a cross-sectional diagram of the line A˜A′ in  FIG. 7  (A). Both  FIGS. 7  (A) and (B) show a part of the through-hole electrode substrate  100  of the embodiment of the invention related to the present embodiment for the convenience of explanation. 
         [0095]    As is shown in  FIG. 7  (A), in the through-hole electrode substrate  100  of the embodiment of the invention related to the present embodiment the apertures (via&#39;s)  110  and  112  of the gas discharge member  106  and  108  are arranged so that the area seen from a planar view (that is, see from an upper surface) becomes larger as they separate from the substrate  102  side. In other words, in a cross-sectional view (that is, seen along the cross-section A˜A′), an angle α formed between the gas discharge member  106  and  108  and the filler  105  is about 45 degrees˜89 degrees. Since the remaining structure is the same as in the first embodiment, an explanation is omitted. Although the insulation layers  106  and  108  are formed by a desired patterning using photolithography using a photosensitive material with insulation properties for example, the apertures (via&#39;s)  110  and  112  of the gas discharge members  106  and  108  can be formed so that the area seen from a planar view becomes larger as they separate from the substrate  102  side by adjusting the exposure conditions. 
         [0096]    In the through-hole electrode substrate  100  of the embodiment of the invention related to the present embodiment, it is possible to prevent step-cut of wiring arranged in an aperture (via) by providing the structure described above. 
         [0097]    In addition, a roughly planar view of the through-hole electrode substrate  100  of the embodiment of the invention related to the present embodiment is shown in  FIG. 8A  and  FIG. 8B . In the present embodiment, the apertures (via&#39;s)  110  and  112  of the gas discharge member  106  and  108  are arranged so that the area seen from a planar view (that is, see from an upper surface) becomes larger as they separate from the substrate  102  side, and since it is possible to reduce the area of the apertures (via&#39;s)  110  and  112  above the filler  105  and secure a contact between the apertures (via&#39;s)  110  and  112  and the filler  105 , it is possible to reduce the possibility of contact defects due to misalignment when forming the apertures (via&#39;s)  110  and  112 . 
         [0098]    For example,  FIG. 8A  shows the case where the aperture (via)  110  above the filler  105  is misaligned on the right side. In addition,  FIG. 8B  shows the case where the aperture (via)  110  above the filler  105  is misaligned on the right side and a part of the aperture (via)  110  becomes separated from above the filler  105 . In both cases shown in  FIG. 8A  and  FIG. 8B , since it is possible to secure a contact between the apertures (via′)  110  and  112  and the filler  105 , it is possible to reduce the possibility of contact defects due to misalignment of the apertures (via&#39;s)  110  and  112 . 
         [0099]    In addition, as is shown in  FIGS. 9 ˜ 11 , it is possible to adopt the same structure as the present embodiment in the first to fourth embodiments described above as explained below. 
         [0100]    As is shown in  FIG. 9  (A), in the through-hole electrode substrate  200  of the embodiment of the invention related to the present embodiment, the apertures (via&#39;s)  210  and  212  of the gas discharge members  206  and  208  are arranged so that the area seen from a planar view (that is, see from an upper surface) becomes larger as they separate from the substrate  202  side. In other words, in a cross-sectional view (that is, seen along the cross-section A˜A′), an angle α formed between the gas discharge members  206  and  208  and the filler  205  is about 45 degrees 89 degrees. Since the remaining structure is the same as in the second embodiment, an explanation is omitted. 
         [0101]    As is shown in  FIG. 10  (A), in the through-hole electrode substrate  300  of the embodiment of the invention related to the present embodiment, the apertures (via&#39;s)  310  and  312  of the gas discharge members  306  and  308  are arranged so that the area seen from a planar view (that is, see from an upper surface) becomes larger as they separate from the substrate  302  side. In other words, in a cross-sectional view (that is, seen along the cross-section A˜A′), an angle α formed between the gas discharge members  306  and  308  and the filler  305  is about 45 degrees˜89 degrees. Since the remaining structure is the same as in the third embodiment, an explanation is omitted. 
         [0102]    As is shown in  FIG. 11  (A), in the through-hole electrode substrate  400  of the embodiment of the invention related to the present embodiment, the apertures (via&#39;s)  410  and  412  of the gas discharge members  406  and  408  are arranged so that the area seen from a planar view (that is, see from an upper surface) becomes larger as they separate from the substrate  402  side. In other words, in a cross-sectional view (that is, seen along the cross-section A˜A′), an angle α formed between the gas discharge members  406  and  408  and the filler  405  is about 45 degrees 89 degrees. Since the remaining structure is the same as in the fourth embodiment, an explanation is omitted. 
         [0103]    As explained above, since it is possible to reduce the area of an aperture (via) above a filler and secure a contact between the apertures (via) and the filler, it is also possible to reduce the possibility of contact defects due to misalignment when forming the aperture (via) in any of the structures of the present embodiment. 
       Eighth Embodiment 
       [0104]    The structure of a semiconductor device  1000  of the embodiment of the invention related to the eighth embodiment is explained while referring to  FIGS. 12 ˜ 14 . In the present embodiment, a semiconductor device  1000  using the through-hole electrode substrates in the first to seventh embodiments described above is explained. 
         [0105]      FIG. 12  shows a semiconductor device  1000  related to the present embodiment. The semiconductor device  1000  is stacked with three through-hole electrode substrates  100  related to the embodiment of the invention and is connected to a LSI substrate (semiconductor substrate)  500 . The LSI substrate  500  is arranged with a wiring layer  502 . 
         [0106]    Semiconductor elements such as a DRAM for example are arranged above the through-hole electrode substrate  100 . A wiring layer  120  is arranged in the through-hole electrode substrate  100 . As is shown in  FIG. 12 , the wiring layer  502  of the LSI substrate  500  and the wiring layer  120  of the through-hole electrode substrate  100  are connected via a bump  1002 . A metal such as indium, copper or gold for example is used for the bump  1002 . In addition, as is shown in  FIG. 12 , the wiring layer  120  of the through-hole electrode substrate  100  is connected with the wiring layer  120  of a different through-hole electrode substrate  100  via the bump  1002 . 
         [0107]    Furthermore, the embodiment of the invention is not limited to three layers in the case where the through-hole electrode substrates  100  are stacked, two layers or four layers are also possible. In addition, the embodiment of the invention is not limited to using a bump in the connection between the through-hole electrode substrate  100  and another substrate, eutectic bonding or another bonding technology may also be used. In addition, the through-hole electrode substrate  100  and another substrate may be adhered together by coating polyimide or an epoxy resin and sintering. 
         [0108]      FIG. 13  shows another example of the semiconductor device  1000  of the embodiment of the invention related to present embodiment. The semiconductor device  1000  shown in  FIG. 13  is stacked with a semiconductor chip (LSI chip)  600  and  602  such as a MEMS device, CPU, memory or IC, and the through-hole electrode substrate  100 , and is connected to a LSI substrate  500   
         [0109]    The through-hole electrode substrate  100  is arranged between the semiconductor chip  600  and the semiconductor chip  602  and both are connected via a bump  1002 . The semiconductor chip  600  is mounted above the LSI substrate  500  and the LSI substrate  500  and the semiconductor chip  602  are connected via a wire  604 . In the present example, the through-hole electrode substrate  100  is used as an interposer for three-dimensional mounting by stacking a plurality of semiconductor chips, and by stacking a plurality of semiconductor chips each with a different function it is possible to form a multi-functional semiconductor device. For example, by forming the semiconductor chip  600  into a tri-axial acceleration sensor and the semiconductor chip  602  into a bi-axial magnetic sensor, it is possible to realize a semiconductor device in which a five-axis motion sensor is realized using one module. 
         [0110]    In the case where a semiconductor chip is a sensor formed using a MEMS device, the sensing results are sometimes output using an analog signal. In this case, a low pass filter or amplifier and the like may be formed in the semiconductor chip  600 ,  602  or through-hole electrode substrate  100 . 
         [0111]      FIG. 14  shows another example of the semiconductor device  1000  related to the present embodiment. Although the two examples ( FIG. 12 ,  FIG. 13 ) described above were three-dimensional mounting, the present example applies the through-hole electrode substrate  100  to a two dimensional and three dimensional combined mounting. In the example shown in  FIG. 14 , six through-hole electrode substrates  100  are stacked and connected to the LSI substrate  500 . However, not only are all the through-hole electrode substrates  100  stacked but are also arranged aligned in a substrate in-plane direction. 
         [0112]    In the example in  FIG. 14 , two through-hole electrode substrates  100  are connected above the LSI substrate  500 , a further through-hole electrode substrate  100  is arranged above the two through-hole electrode substrates  100 , and a further through-hole electrode substrate  100  is arranged above. Furthermore, as in the example shown in  FIG. 13 , two dimensional and three dimensional combined mounting is possible even when the through-hole electrode substrate  100  is used as an interposer or connecting a plurality of semiconductor chips. For example, several through-hole electrode substrates  100  may be replaced for a semiconductor chip. 
         [0113]    In addition, although an example in which the through-hole electrode substrate  100  of the embodiment of the invention related to the first embodiment is used as a through-hole electrode substrate in the examples in  FIGS. 12 ˜ 14 , the embodiment of the invention is not limited to this and the through-hole electrode substrates  200 ,  300  and/or  400  of the embodiment of the invention related to the other embodiments may also be used. 
         [0114]    The semiconductor device  1000  of the embodiment of the invention related to the present embodiment is mounted in various electronic devices for example in a mobile terminal (mobile phone, smartphone and note type personal computer and the like), a data processing device (desktop type personal computer, server, car navigation and the like) and household appliances and the like. 
         [0115]    According to the embodiment of the invention, it is possible to provide a through-hole electrode substrate and a semiconductor device with a high level of reliability which can eliminate defects due to gas collecting in a gas reservoir in a through-hole and allows prevention of dropout of a filler from within the through-hole.