Patent Publication Number: US-2011073154-A1

Title: Solar cell module

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is based upon and claims the benefit of priority from Japanese Patent Application No. P2009-224664 entitled “SOLAR CELL MODULE,” filed on Sep. 29, 2009, the entire content of which are incorporated by reference. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The invention relates to a solar cell module in which multiple solar cells are electrically connected to each other by a wiring member. 
     2. Description of the Related Art 
     Solar cells are expected to be a new energy source because they directly convert clean and inexhaustibly supplied sunlight into electricity. In order to increase output, a solar cell module consists of multiple solar cells connected together. In a solar cell module, multiple solar cells are electrically connected to each other by a wiring member. 
     A solar cell includes, for example, a photoelectric conversion body that generates carriers upon exposure to light (e.g., sunlight), and an electrode that collects the carriers from the photoelectric conversion body. Specifically, the photoelectric conversion body has a light-receiving surface that receives irradiated light, and a rear surface provided on the opposite side to the light-receiving surface. The electrode is provided on the light-receiving surface and the rear surface of the photoelectric conversion body. The light-receiving surface and the rear surface are collectively called the main surface of the photoelectric conversion body. 
     Here, in order to simplify the manufacturing process of a solar cell module, a technology has been proposed that uses a wiring substrate in which a pattern of electrodes is formed (for example, Patent Document 1: Japanese Patent Application Publication No. 2002-319691, Patent Document 2: Japanese Patent Application Publication No. 2005-340362, and Patent Document 3: Japanese Patent Application Publication No. 2007-019334). 
     SUMMARY OF THE INVENTION 
     An aspect of the invention provides a solar cell module that comprises: a plurality of solar cells each comprising: a photoelectric conversion body configured to generate carriers upon exposure to light; and an electrode provided on the main surface of the photoelectric conversion body, and configured to collect the carriers from the photoelectric conversion body; a wiring member configured to electrically connect the plurality of solar cells; and a wiring substrate that covers main surfaces of at least two or more solar cells out of the plurality of solar cells, the wiring substrate comprising a groove provided along at least a part of the electrodes, wherein a conductive member is provided at a bottom of the groove, and the conductive member electrically connects the electrodes to the wiring member. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a view showing a configuration of solar cell module  100  according to a first embodiment; 
         FIG. 2  is a view showing a configuration of solar cell module  100  according to the first embodiment; 
         FIG. 3  is a view showing a configuration of solar cell  10  according to the first embodiment; 
         FIG. 4  is a view showing the configuration of solar cell  10  according to the first embodiment; 
         FIG. 5  is a view showing the configuration of solar cell  10  according to the first embodiment; 
         FIG. 6  is a view showing the configuration of solar cell  10  according to the first embodiment; 
         FIG. 7  is a view showing an arrangement of solar cells  10  according to the first embodiment; 
         FIG. 8  is a view showing a configuration (1) of wiring substrate  30  according to the first embodiment; 
         FIG. 9  is a view showing the configuration (1) of wiring substrate  30  according to the first embodiment; 
         FIG. 10  is a view showing connection between solar cells  10  according to the first embodiment; 
         FIG. 11  is a view showing the connection between solar cells  10  according to the first embodiment; 
         FIG. 12  is a view showing the connection between solar cells  10  according to the first embodiment; 
         FIG. 13  is a view showing a configuration (2) of wiring substrate  30  according to the first embodiment; 
         FIG. 14  is a view showing the configuration (2) of wiring substrate  30  according to the first embodiment; 
         FIG. 15  is a view showing a configuration of wiring substrate  30  according to modification example 1 of the first embodiment; 
         FIG. 16  is a view showing an arrangement of solar cells  10  according to modification example 2 of the first embodiment; 
         FIG. 17  is a view showing a configuration of wiring substrate  30  according to modification example 2 of the first embodiment; 
         FIG. 18  is a view showing connection between solar cells  10  according to modification example 2 of the first embodiment; 
         FIG. 19  is a view showing an arrangement of solar cells  10  according to a second embodiment; 
         FIG. 20  is a view showing a configuration of wiring substrate  30  according to the second embodiment; 
         FIG. 21  is a view showing connection between solar cells  10  according to the second embodiment; 
         FIG. 22  is a view showing an arrangement of solar cells  10  according to modification example 1 of the second embodiment; 
         FIG. 23  is a view showing a configuration of wiring substrate  30  according to modification example 1 of the second embodiment; 
         FIG. 24  is a view showing connection between solar cells  10  according to modification example 1 of the second embodiment; 
         FIG. 25  is a view showing the connection between solar cells  10  according to modification example 1 of the second embodiment; 
         FIG. 26  is a view showing a configuration of solar cell module  100  according to a third embodiment; 
         FIG. 27  is a view showing a configuration of solar cell  10  according to the third embodiment; 
         FIG. 28  is a view showing the configuration of solar cell  10  according to the third embodiment; and 
         FIG. 29  is a view showing connect ion between solar cells  10  according to the third embodiment. 
     
    
    
     DETAILED DESCRIPTION OF EMBODIMENTS 
     In the following, solar cell modules according to embodiments are described with reference to the drawings. In the following description of the drawings, identical or similar reference numerals are assigned to identical or similar components. 
     All of the drawings are provided for the purpose of illustrating the respective examples only. No dimensional proportion in the drawings shall impose a restriction on the drawings. For this reason, specific dimensions and the like should be interpreted by with the following descriptions taken into consideration. In addition, the drawings include parts whose dimensional relationship and ratio are different from one drawing to another. 
     Prepositions, such as “on”, “over” and “above” may be defined with respect to a surface, for example a layer surface, regardless of that surface&#39;s orientation in space. The preposition “above” may be used in the specification and claims even if a layer is in contact with another layer. The preposition “on” may be used in the specification and claims when a layer is not in contact with another layer, for example, when there is an intervening layer between them. 
     In the solar cell module according to each embodiment, multiple solar cells are electrically connected to each other by a wiring member. The solar cell module includes a wiring substrate that covers the main surfaces of at least two or more solar cells of the multiple solar cells. Each of the multiple solar cells includes a photoelectric conversion body that generates carriers upon exposure to light, and an electrode that is provided on the main surface of the photoelectric conversion body, and collects the carriers from the photoelectric conversion body. The wiring substrate has a groove provided along at least a part of the electrode. A conductive member is provided at the bottom of the groove. The conductive member provided at the bottom of the groove connects the electrode to the wiring member. 
     In the embodiments, the wiring substrate has a groove provided along at least a part of the electrode. Thus, alignment of the wiring substrate with at least two solar cells is easy. 
     In the embodiments, a conductive member is provided at the bottom of the groove provided in the wiring substrate, the conductive member connecting the electrode to the wiring member. Consequently, wiring such as tab wiring can be simplified. That is, the manufacturing process of the solar cell module is simplified. 
     First Embodiment 
     Configuration of Solar Cell Module 
     In the following, the configuration of a solar cell module according to the first embodiment is described with reference to the drawings.  FIGS. 1 and 2  are views showing the configuration of solar cell module  100  according to the first embodiment. Note that  FIG. 1  is a view of solar cell module  100  viewed from the rear surface that is provided on the opposite side to the light-receiving surface which receives irradiated light.  FIG. 2  is a view showing a cross section of solar cell module  100 . Note that  FIG. 1  is shown with rear surface member  320  omitted. 
     Solar cell module  100  includes multiple solar cell linear arrays  110  (solar cell array  110 A to solar cell array  110 F), and terminal box  200  as shown in  FIG. 1 . 
     The multiple solar cell arrays  110  are arranged in arrangement direction B, and each solar cell array  110  has multiple solar cells  10 . In solar cell array  110 , multiple solar cells  10  are arranged in arrangement direction A. 
     Here, in solar cell array  110 , multiple solar cells  10  are electrically connected to each other by wiring member  20 A. Between solar cell arrays  110 , multiple solar cells  10  are electrically connected to each other by wiring member  20 B. In the following, wiring member  20 A and wiring member  20 B are collectively called wiring member  20 . 
     For example, solar cell array  110 A has solar cells  10 A to  10 E. Solar cells  10 A to  10 E are electrically connected to each other by wiring member  20 A. 
     Solar cell  10 E provided at one end of solar cell array  110 A and solar cell  10 F provided at one end of solar cell array  110 B are electrically connected to each other by wiring member  20 B. 
     Terminal box  200  is disposed on the rear surface provided on the opposite side to the light-receiving surface that receives irradiated light. Terminal box  200  is connected with multiple lead electrodes  120  (lead electrodes  120 A to  120 D) that are connected to wiring member  20 . Terminal box  200  outputs electric power via wiring member  20  and lead electrodes  120  to the outside via an output cable (not shown). Lead electrodes  120 A to  120 D are connected to wiring member  20 B that electrically connects multiple solar cells  10  to each other between solar cell arrays  110 . 
     Solar cell module  100  has light-receiving surface member  310 , rear surface member  320 , and sealing material  330  as shown in  FIG. 2 . Solar cell array  110  is sealed with sealing material  330  between light-receiving surface member  310  and rear surface member  320 . 
     Light-receiving surface member  310  is provided on the light-receiving surface side of solar cell  10 , and protects the light-receiving surface of solar cell  10 . Light-receiving surface member  310  is made of glass or plastic that is transparent and impervious to water. 
     Rear surface member  320  is provided on the rear surface side of solar cell  10 , and protects the rear surface of solar cell  10 . Rear surface member  320  is, for example, a resin film such as PET (Polyethylene Terephthalate) or a laminated film having a structure in which an Al foil is sandwiched between resin films. 
     Sealing material  330  is filled between light-receiving surface member  310  and rear surface member  320 . Sealing material  330  includes a transparent member. Sealing material  330  is made of, for example, a resin such as EVA, EEA, PVB, silicone, urethane, acrylic, or epoxy. 
     Wiring substrate  30  is provided on the rear surface side of multiple solar cells  10 . Wiring substrate  30  includes an insulating member, and covers the rear surfaces of at least two or more solar cells  10 . 
     (Configuration of Solar Cell) 
     In the following, the configuration of the solar cell according to the first embodiment is described with reference to the drawings.  FIGS. 3 to 6  are views showing the configuration of solar cell  10  according to the first embodiment. Note that  FIG. 3  is a view of solar cell  10  viewed from the rear surface that is provided on the opposite side to the light-receiving surface which receives irradiated light.  FIG. 4  is a view of solar cell  10  viewed from the light-receiving surface that receives irradiated light.  FIG. 5  is a view showing a cross section of solar cell  10  (the cross-section taken along the line A-A shown in  FIG. 3 ).  FIG. 6  is a view showing a cross section of solar cell  10  (the cross-section taken along the line B-B shown in  FIG. 3 ). 
     As shown in  FIGS. 3 to 6 , solar cell  10  has photoelectric conversion body  11 , first electrode  12 , second electrode  13 , through hole electrode  14 , and insulating member  15 . 
     Photoelectric conversion body  11  generates carriers upon exposure to light. The carriers are a pair of a positive hole and a negative electron. Photoelectric conversion body  11  has light-receiving surface  11 M that receives irradiated light, and rear surface  11 N provided on the opposite side to light-receiving surface  11 M. In the first embodiment, a first conductivity type region is formed in light-receiving surface  11 M of photoelectric conversion body  11 , and a second conductivity type region is formed in rear surface  11 N of photoelectric conversion body  11 . 
     Photoelectric conversion body  11  may include a semiconductor substrate made of crystalline semiconductor material such as monocrystal Si and polycrystal Si. Photoelectric conversion body  11  may include a semiconductor substrate made of compound semiconductor material such as GaAs or InP. 
     Photoelectric conversion body  11  may include a structure having intrinsic amorphous Si between a monocrystal Si substrate and an amorphous Si layer (HIT structure). The HIT structure improves the characteristic of a heterojunction interface. 
     First electrode  12  is an electrode that collects carriers (positive holes or electrons). Specifically, first electrode  12  has first rear surface electrode  12 A and second rear surface electrode  12 B. 
     First rear surface electrode  12 A has a linear shape extending in arrangement direction B, and is provided on rear surface  11 N of photoelectric conversion body  11 . Multiple first rear surface electrodes  12 A are preferably disposed substantially across the entire area of rear surface  11 N of photoelectric conversion body  11 . 
     Second rear surface electrode  12 B has a linear shape portion extending in arrangement direction A and a linear shape portion extending in arrangement direction B, and is provided on rear surface  11 N of photoelectric conversion body  11 . The linear shape portion extending in arrangement direction B is provided at end portion in arrangement direction A of solar cell  10 . 
     Here, second rear surface electrode  12 B intersects with and is electrically connected to multiple first rear surface electrodes  12 A on rear surface  11 N of photoelectric conversion body  11 . 
     First rear surface electrode  12 A and second rear surface electrode  12 B comprises, for example, low resistance metal such as Ag and Cu. 
     Second electrode  13  is an electrode that collects carriers (positive holes or electrons). Specifically, second electrode  13  has first light-receiving surface electrode  13 A and second light-receiving surface electrode  13 B. 
     First light-receiving surface electrode  13 A has a linear shape extending in arrangement direction B, and is provided on light-receiving surface  11 M of photoelectric conversion body  11 . Multiple first light-receiving surface electrodes  13 A are preferably disposed substantially across the entire area of light-receiving surface  11 M of photoelectric conversion body  11 . 
     Second light-receiving surface electrode  13 B has a linear shape extending in arrangement direction A, and is provided on rear surface  11 N of photoelectric conversion body  11 . Here, second light-receiving surface electrode  13 B intersects with multiple first light-receiving surface electrodes  13 A on a projection plane approximately parallel to the main surface of photoelectric conversion body  11  (light-receiving surface  11 M or rear surface  11 N) 
     First light-receiving surface electrode  13 A and second light-receiving surface electrode  13 B are made of, for example, low resistance metal such as Ag and Cu. 
     Second light-receiving surface electrode  13 B is not directly connected to second rear surface electrode  12 B. 
     Through hole electrode  14  is provided in a through hole that passes through photoelectric conversion body  11 . Through hole electrode  14  electrically connects first light-receiving surface electrode  13 A to second light-receiving surface electrode  13 B. Through hole electrode  14  is made of, for example, low resistance metal such as Ag and Cu. 
     Although through hole electrode  14  protrudes from second light-receiving surface electrode  13 B in  FIG. 3 , through hole electrode  14  may be configured not to protrude from second light-receiving surface electrode  13 B. That is, through hole electrode  14  may be covered with second light-receiving surface electrode  13 B. 
     Insulating member  15  is provided in a through hole that passes through photoelectric conversion body  11 . Insulating member  15  covers the outer circumference of through hole electrode  14 . Insulating member  15  insulates through hole electrode  14  from photoelectric conversion body  11 . Insulating member  15  may insulate through hole electrode  14  from first rear surface electrode  12 A. 
     (Arrangement of Solar Cells) 
     In the following, the arrangement of the solar cells according to the first embodiment is described with reference to the drawings.  FIG. 7  is a view showing an arrangement of solar cells  10  according to the first embodiment. Note that  FIG. 7  is a view of solar cells  10  viewed from the rear surface side. 
     Here, solar cell  10 X and solar cell  10 Y out of multiple solar cells  10  are described as an example. Solar cell  10 X and solar cell  10 Y are solar cells  10  adjacent to each other in solar cell array  110 . For example, solar cell  10 X is solar cell  10 A provided in solar cell array  110 A, and solar cell  10 Y is solar cell  10 B provided in solar cell array  110 A (see  FIG. 1 ). 
     In the first embodiment, solar cell  10 X and solar cell  10 Y have the same configuration as shown in  FIG. 7 . Also, the directions of solar cell  10 X and solar cell  10 Y are the same. 
     (Configuration (1) of Wiring Substrate) 
     In the following, the configuration (1) of the wiring substrate according to the first embodiment is described with reference to the drawings.  FIGS. 5 and 9  are views showing wiring substrate  30  according to the first embodiment. 
     Here, the case is illustrated where wiring substrate  30  covers rear surface  11 N of solar cell  10 X and rear surface  11 N of solar cell  10 Y.  FIGS. 8 and 9  are views showing one of the faces of wiring substrate  30 , which is opposed to rear surface  11 N. 
     As shown in  FIG. 8 , wiring substrate  30  includes insulator  31 , and insulator  31  has groove  32 , groove  33 , and groove  34 . For insulator  31 , a rubber resin, a silicone resin, a urethane resin, an epoxy resin, a resin having a porous structure, and the like may be used. 
     Groove  32  is provided along a part of first electrode  12 , i.e., second rear surface electrode  12 B. Groove  33  is provided along a part of second electrode  13 , i.e., second light-receiving surface electrode  13 B. Groove  34  is provided along a part of second rear surface electrode  12 B. Also, groove  32  on solar cell  10 X side communicates with groove  34 , and groove  33  on solar cell  10 Y side communicates with groove  34 . 
     As shown in  FIG. 9 , conductive member  42  is provided at the bottom of groove  32 , and conductive member  43  is provided at the bottom of groove  33 . Also, conductive member  44  and wiring member  20 A are provided at the bottom of groove  34 . Conductive member  42 , conductive member  43 , and conductive member  44  are made of a conductive material similar to wiring member  20 A. 
     Note that, in the first embodiment, it is just stated that conductive member  44  and wiring member  20 A are provided at the bottom of groove  34  for convenience of the description. However, as is apparent from the condition that conductive member  44  and wiring member  20 A are made of a similar conductive material, conductive member  44  and wiring member  20 A provided at the bottom of groove  34  does not necessarily have to be distinguished. 
     Since groove  32  on solar cell  10 X side communicates with groove  34  as described above, conductive member  42  on solar cell  10 X side is connected to wiring member  20 A via conductive member  44 . Similarly, since groove  33  on solar cell  10 Y side communicates with groove  34 , conductive member  43  on solar cell  10 Y side is connected to wiring member  20 A. 
     Here, when wiring substrate  30  is provided on rear surface  11 N of solar cell  10 X and rear surface  11 N of solar cell  10 Y, conductive member  42  is electrically connected to second rear surface electrode  12 B, and conductive member  43  is electrically connected to second light-receiving surface electrode  13 B. 
     In other words, second rear surface electrode  12 B of solar cell  10 X is electrically connected to wiring member  20 A via conductive member  42  and conductive member  44 . Similarly, second light-receiving surface electrode  13 B of solar cell  10 Y is electrically connected to wiring member  20 A via conductive member  43 . 
     That is, solar cell  10 X and solar cell  10 Y are electrically connected to each other by wiring member  20 A. 
     In the first embodiment, width W 2  of wiring substrate  30  in arrangement direction B is smaller than width W 1  of solar cell  10 X for solar cell  10 Y). In other words, width W 2  of wiring substrate  30  is smaller than width W 1  of solar cell array  110 . 
     The depth of the grooves (groove  32 , groove  33 , and groove  34 ), the thickness of the conductive members (conductive member  42 , conductive member  43 , and conductive member  44 ), and the relationship between the electrodes (first electrode  12  and second electrode  13 ) are preferably as shown below. 
     The depth of the groove is preferably in a range of 10 μm to 1000 μm. The thickness of the conductive member is preferably 1 μm to “the depth of the groove −1” μm. The thickness of the electrode is preferably several 10 μm. 
     Furthermore, when the thickness of the wiring substrate (wiring substrate  30 ) is 100 μm, the depth of the groove is preferably 60 μm, the thickness of the conductive member is preferably 20 μm or more, and the thickness of the electrode is preferably 40 μm or more. 
     In order to have a better contact between the conductive member and the electrode, the depth of the groove is preferably approximately 10 μm less than “the thickness of the conductive member”+“the thickness of the electrode.” 
     (Connection Between Solar Cells) 
     In the following, the connection between the solar cells according to the first embodiment is described with reference to the drawings.  FIGS. 10 to 12  are views showing the cross sections of solar cell  10  and wiring substrate  30  according to the first embodiment. Specifically,  FIG. 10  is a view showing the cross sections (taken along the line C-C shown in  FIG. 9 ) of solar cell  10  and wiring substrate  30 .  FIG. 11  is a view showing the cross sections (taken along the line D-D shown in  FIG. 9 ) of solar cell  10  and wiring substrate  30 .  FIG. 12  is a view showing the cross sections (taken along the line E-E shown in  FIG. 9 ) of solar cell  10  and wiring substrate  30 . 
     As shown in  FIG. 10 , second rear surface electrode  12 B of solar cell  10 X is electrically connected to wiring member  20 A via conductive member  42 . On the other hand, second rear surface electrode  12 B of solar cell  10 X is insulated from second rear surface electrode  12 B of solar cell  10 Y by wiring substrate  30  (insulator  31 ). 
     As shown in  FIG. 11 , second light-receiving surface electrode  13 B of solar cell  10 Y is electrically connected to wiring member  20 A via conductive member  43 . On the other hand, second light-receiving surface electrode  13 B of solar cell  10 Y is insulated from second light-receiving surface electrode  13 B of solar cell  10 X by wiring substrate  30  (insulator  31 ). 
     As shown in  FIG. 12 , in solar cell  10 X, second rear surface electrode  12 B is insulated from second light-receiving surface electrode  13 B by wiring substrate  30  (insulator  31 ). 
     As shown in  FIGS. 10 to 12 , second rear surface electrode  12 B and second light-receiving surface electrode  13 B are provided so as not to be electrically connected to each other in solar cell  10 X (or solar cell  10 Y). On the other hand, second rear surface electrode  12 B of solar cell  10 X and second light-receiving surface electrode  13 B of solar cell  10 Y are electrically connected to each other by wiring member  20 A. 
     (Configuration (2) of Wiring Substrate) 
     In the following, the configuration (2) of the wiring substrate according to the first embodiment is described with reference to the drawings.  FIGS. 13 and 14  are views showing wiring substrate  30  according to the first embodiment. 
     Here, solar cell  10 P and solar cell  10 Q out of multiple solar cells  10  are described as an example. Solar cell  10 P and solar cell  10 Q are solar cells  10  adjacent to each other between two adjacent solar cell arrays  110 . For example, solar cell  10 P is solar cell  10 E provided at one end of solar cell array  110 A, and solar cell  10 Q is solar cell  10 F provided at one end of solar cell array  110 B (see  FIG. 1 ). 
     Also, the case is illustrated where wiring substrate  30  covers rear surface  11 N of solar cell  10 P and rear surface  11 N of solar cell  10 Q.  FIGS. 13 and 14  are views showing one of the faces of wiring substrate  30 , which is opposed to rear surface  11 N. 
     As shown in  FIG. 13 , wiring substrate  30  includes insulator  31 , and insulator  31  has groove  35  in addition to groove  32 , groove  33 , and groove  34 . Groove  32 , groove  33 , and groove  34  are similar to groove  32 , groove  33 , and groove  34  shown in  FIG. 8 . 
     Groove  35  extends continuously across solar cell  10 P and solar cell  10 Q. Specifically, groove  35  extends continuously across one end of solar cell  10 P and one end of solar cell  10 Q in arrangement direction A. Also, groove  35  communicates with groove  33  on solar cell lop side and groove  32  on solar cell  10 Q side. 
     As shown in  FIG. 14 , conductive member  42  is provided at the bottom of groove  32 , and conductive member  43  is provided at the bottom of groove  33 . Conductive member  44  and wiring member  20 A are provided at the bottom of groove  34 . 
     Here, wiring member  203  is provided at the bottom of groove  35 , the wiring member  20 B electrically connecting multiple solar cells  10  to each other between two adjacent solar cell arrays  110 . Since groove  33  on solar cell  10 P side communicates with groove  35  as described above, conductive member  43  on solar cell  10 P side is connected to wiring member  20 B. Similarly, since groove  32  of solar cell  10 Q communicates with groove  35 , conductive member  42  on solar cell  10 Q side is connected to wiring member  20 B. 
     In other words, second light-receiving surface electrode  13 B of solar cell  10 P is electrically connected to wiring member  20 B via conductive member  43 . Similarly, second rear surface electrode  12 B of solar cell  10 Q is electrically connected to wiring member  20 B via conductive member  42 . 
     That is, solar cell  10 P and solar cell  10 Q are electrically connected to each other by wiring member  20 B. 
     (Operations and Effects) 
     In this embodiment, groove  32  and groove  33  in wiring substrate  30  are provided along second rear surface electrode  12 B and second light-receiving surface electrode  13 B. Consequently, alignment of wiring substrate  30  with at least two or more solar cells  10  is easy. 
     In this embodiment, the conductive members (conductive member  42  and conductive member  43 ) are provided at the bottom of the grooves (groove  32  and groove  33 ) provided in wiring substrate  30 , and the conductive member (conductive member  42  or conductive member  43 ) connects the electrode (second rear surface electrode  12 B or second light-receiving surface electrode  13 B) to wiring member  20 . Consequently, wiring of wiring member such as tab wiring can be simplified. That is, the manufacturing process of solar cell module  100  is simplified. 
     Specifically, the two cases shown below are conceivable. Case (1) is where solar cells  10  adjacent to each other (solar cell  10 X and solar cell  10 Y) are electrically connected to each other in solar cell array  110 . Case (2) is where solar cells  10  adjacent to each other (solar cell  10 P and solar cell  10 Q) are electrically connected to each other between two adjacent solar cell strings  110 . 
     In case (1), second rear surface electrode  12 B of solar cell  10 X is electrically connected to wiring member  20 A via conductive member  42  and conductive member  44 . Similarly, second light-receiving surface electrode  13 B of solar cell  10 Y is electrically connected to wiring member  20 A via conductive member  43 . Thereby, solar cell  10 X and solar cell  10 Y are electrically connected to each other by wiring member  20 A. 
     In case (1), wiring member  20 A is provided in groove  34  that is provided in wiring substrate  30 . Consequently, wiring of the wiring member, which is used for electrically connecting multiple solar cells  10  to each other in solar cell array  110 , can be omitted, thus the manufacturing process of solar cell module  100  is simplified. 
     In case (2), second light-receiving surface electrode  13 B of solar cell  10 P is electrically connected to wiring member  20 B via conductive member  43 . Similarly, second rear surface electrode  12 B of solar cell  10 Q is electrically connected to wiring member  20 B via conductive member  42 . Thereby, solar cell  10 P and solar cell  10 Q are electrically connected to each other by wiring member  208 . 
     In case (2), wiring member  2013  is provided in groove  35  that is provided in wiring substrate  30 . Consequently, wiring of the wiring member, which is used for electrically connecting multiple solar cells  10  to each other between two adjacent solar cell arrays  110 , can be omitted, thus the manufacturing process of solar cell module  100  is simplified. 
     In the above-described case (1) in this embodiment, width W 2  of wiring substrate  30  is smaller than width W 1  of solar cell string  110 . Thus, the space between solar cell arrays  110  can be reduced. That is, the scale of integration of solar cells  10  can be increased. 
     In the above-described case (2) in this embodiment, lead electrode  120  is provided to wiring member  20 B (see  FIG. 1 ). Thus, lead electrode  120  does not protrude to the outside of solar cell string  110  in arrangement direction  8 , which allows suppressing an increase of the size of solar cell module  100 . 
     Modification Example 1 
     In the following, modification example 1 of the first embodiment is described with reference to the drawings. In the following, points of modification example 1 different from those of the first embodiment are mainly described. 
     Specifically, in the first embodiment, wiring member  20 A has a linear shape. On the other hand, in modification example 1, wiring member  20 A has a zigzag shape as shown in  FIG. 15 . 
     modification example 1 is similar to the first embodiment in that wiring member  20 A is provided in groove  34  of wiring substrate  30 . That is, groove  34  of wiring substrate  30  has a zigzag shape. 
     Modification Example 2 
     In the following, modification example 2 of the first embodiment is described with reference to the drawings. In the following, points of modification example 2 different from those of the first embodiment are mainly described. 
     Specifically, in modification example 2, the pattern of the electrodes is different from that of the first embodiment. Also, in modification example 2, an elastic member is provided between the bottom of the grooves (groove  32  and groove  33 ) and the conductive members (conductive member  42  and conductive member  43 ). 
     (Arrangement of Solar Cells) 
     In the following, an arrangement of solar cells according to modification example 2 is described with reference to the drawings.  FIG. 16  is a view showing an arrangement of solar cells  10  according to modification example 2. Note that  FIG. 16  is a view of solar cells  10  viewed from the rear surface side. 
     Here, solar cell  10 X and solar cell  10 Y out of multiple solar cells  10  are described as an example. Solar cell  10 X and solar cell  101  are solar cells  10  adjacent to each other in solar cell array  110 . 
     In modification example 2, solar cell  10 X and solar cell  101  have a similar configuration as shown in  FIG. 16 . On the other hand, the direction of solar cell  10 X is different from that of solar cell  10 Y by 180°. 
     Here, second rear surface electrode  12 B of solar cell  10 X and second light-receiving surface electrode  13 B of solar cell  10 Y are preferably arranged on an approximately straight line. Similarly, second light-receiving surface electrode  13 B of solar cell  10 X and second rear surface electrode  12 B of solar cell  101  are preferably arranged on an approximately straight line. 
     (Configuration of Wiring Substrate) 
     In the following, the configuration of the wiring substrate according to modification example 2 is described with reference to the drawings.  FIG. 17  is a view showing wiring substrate  30  according to modification example 2. 
     Here, the case is illustrated where wiring substrate  30  covers rear surface  11 N of solar cell  10 X and rear surface  11 N of solar cell  10 Y.  FIG. 17  is a view showing one of the faces of wiring substrate  30 , which is opposed to rear surface  11 N. 
     As shown in  FIG. 17 , conductive member  42 , conductive member  43 , and wiring member  20 A are provided across multiple solar cells  10 . In the second embodiment, conductive member  42 , conductive member  43 , and wiring member  20 A are provided across multiple solar cells  10  on an approximately straight line. 
     Modification example 2 is similar to the first embodiment in that conductive member  42  is provided in groove  32  of wiring substrate  30 , and conductive member  43  is provided in groove  33  of wiring substrate  30 . Similarly, modification example 2 is similar to the first embodiment in that wiring member  20 A is provided in groove  34  of wiring substrate  30 . That is, the grooves of wiring substrate  30  (groove  32 , groove  33 , and groove  34 ) are provided across multiple solar cells  10  on an approximately straight line. 
     (Connection Between Solar Cells) 
     In the following, the connection between the solar cells according to modification example 2 is described with reference to the drawings.  FIG. 18  is a view showing the cross sections of solar cell  10  and wiring substrate  30  according to modification example 2. Specifically,  FIG. 18  is a view showing the cross sections (taken along the line F-F shown in  FIG. 17 ) of solar cell  10  and wiring substrate  30 . 
     As shown in  FIG. 18 , second rear surface electrode  12 B of solar cell  10 X is electrically connected to wiring member  20 A via conductive member  42 . On the other hand, second light-receiving surface electrode  13 B of solar cell  10 Y is electrically connected to wiring member  20 A via conductive member  43 . Thus, second rear surface electrode  12 B of solar cell  10 X and second light-receiving surface electrode  13 B of solar cell  10 Y are electrically connected to each other by wiring member  20 A. 
     Also, as shown in  FIG. 18 , elastic member  52  is provided between the bottom of groove  32  and conductive member  42 . Also, elastic member  53  is provided between the bottom of groove  33  and conductive member  43 . For elastic member  52  and elastic member  53 , a rubber resin, a silicone resin, a urethane resin, an epoxy resin, a resin having a porous structure, and the like may be used. 
     (Operations and Effects) 
     In modification example 2, second rear surface electrode  12 B of solar cell  10 X and second light-receiving surface electrode  13 B of solar cell  10 Y are arranged on an approximately straight line. Similarly, second light-receiving surface electrode  13 B of solar cell  10 X and second rear surface electrode  12 B of solar cell  10 Y are arranged on an approximately straight line. 
     Thus, the grooves of wiring substrate  30  (groove  32 , groove  33 , and groove  34 ) are provided across multiple solar cells  10  on an approximately straight line. That is, the pattern of the grooves of wiring substrate  30  is simple. 
     In modification example 2, elastic member  52  is provided between the bottom of groove  32  and conductive member  42 , and elastic member  53  is provided between the bottom of groove  33  and conductive member  43 . Consequently, the stress generated when wiring substrate  30  is bonded to photoelectric conversion body  11  is relieved by elastic member  52  and elastic member  53 . 
     Second Embodiment 
     In the following, the second embodiment is described with reference to the drawings. In the following, points of the second embodiment different from those of the first embodiment are mainly described. 
     Specifically, in the first embodiment, an electrode is provided to both of light-receiving surface  11 M and rear surface  11 N. On the contrary, in the second embodiment, the electrodes are grouped together on rear surface  11 N. 
     (Arrangement of Solar Cells) 
     In the following, an arrangement of solar cells according to the second embodiment is described with reference to the drawings.  FIG. 19  is a view showing an arrangement of solar cells  10  according to the second embodiment. Note that  FIG. 19  is a view of solar cells  10  viewed from the rear surface side. 
     Here, solar cell  10 X and solar cell  10 Y out of multiple solar cells  10  are described as an example. Solar cell  10 X and solar cell  10 Y are solar cells  10  adjacent to each other in solar cell array  110 . 
     In the second embodiment, solar cell  10  has first electrode  12 C of a first conductivity type and second electrode  12 D of a first conductivity type instead of first rear surface electrode  12 A and second rear surface electrode  12 B. Similarly, solar cell  10  has first electrode  13 C of a second conductivity type and second electrode  13 D of a second conductivity type instead of first light-receiving surface electrode  13 A and second light-receiving surface electrode  13 B. 
     First electrode  12 C of the first conductivity type and second electrode  12 D of the first conductivity type form first electrode  12  that collects carriers (positive holes or electrons). First electrode  12 C of the first conductivity type and second electrode  12 D of the first conductivity type are provided on rear surface  11 N of photoelectric conversion body  11 , and are made of, for example, low resistance metal such as Ag and Cu. 
     Specifically, first electrode  12 C of the first conductivity type has a linear shape extending in arrangement direction B. Second electrode  12 D of the first conductivity type has a linear shape extending in arrangement direction A. Second electrode  12 D of the first conductivity type is provided at an end of solar cell  10  in arrangement direction B. 
     Multiple first electrodes  12 C of the first conductivity type are preferably provided substantially across the entire area of rear surface  11 N of photoelectric conversion body  11 . Second electrode  12 D of the first conductivity type intersects with and is electrically connected to multiple first electrodes  12 C of the first conductivity type on rear surface  11 N of photoelectric conversion body  11 . 
     First electrode  13 C of the second conductivity type and second electrode  13 D of the second conductivity type form second electrode  13  that collects carriers (electrons or positive holes). First electrode  13 C of the second conductivity type and second electrode  13 D of the second conductivity type are provided on rear surface  11 N of photoelectric conversion body  11 , and are made of, for example, low resistance metal such as Ag and Cu. 
     Specifically, first electrode  13 C of the second conductivity type has a linear shape extending in arrangement direction B. Second electrode  13 D of the second conductivity type has a linear shape extending in arrangement direction A. Second electrode  13 D of the second conductivity type is provided at an end of solar cell  10  in arrangement direction B. 
     Multiple first electrodes  13 C of the second conductivity type are preferably provided substantially across the entire area of rear surface  11 N of photoelectric conversion body  11 . Second electrode  13 D of the second conductivity type intersects with and is electrically connected to multiple first electrodes  13 C of the second conductivity type on rear surface  11 N of photoelectric conversion body  11 . 
     Here, it should be noted that first electrode  12 C of the first conductivity type and second electrode  12 D of the first conductivity type are provided so as not to be electrically connected to first electrode  13 C of the second conductivity type and second electrode  13 D of the second conductivity type. 
     In the second embodiment, the first conductivity type region and the second conductivity type region are each partially formed in rear surface  11 N of photoelectric conversion body  11 . First electrode  12 C of the first conductivity type and second electrode  12 D of the first conductivity type are formed in the first conductivity type region partially formed in rear surface  11 N of photoelectric conversion body  11 . First electrode  13 C of the second conductivity type and second electrode  13 D of the second conductivity type are formed in the second conductivity type region partially formed in rear surface  11 N of photoelectric conversion body  11 . 
     In the second embodiment, solar cell  10 X and solar cell  10 Y have a similar configuration as shown in  FIG. 19 . On the other hand, the direction of solar cell  10 X is different from that of solar cell  10 Y by 180°. 
     Here, second electrode  12 D of the first conductivity type of solar cell  10 X and second electrode  13 D of the second conductivity type of solar cell  10 Y are arranged on an approximately straight line. Similarly, second electrode  13 D of the second conductivity type of solar cell  10 X and second electrode  12 D of the first conductivity type of solar cell  10 Y are arranged on an approximately straight line. 
     (Configuration of Wiring Substrate) 
     In the following, the configuration of the wiring substrate according to the second embodiment is described with reference to the drawing.  FIG. 20  is a view showing wiring substrate  30  according to the second embodiment. 
     Here, the case is illustrated where wiring substrate  30  covers rear surface  11 N of solar cell  10 X and rear surface  11 N of solar cell  10 Y.  FIG. 20  is a view showing one of the faces of wiring substrate  30 , which is opposed to rear surface  11 N. 
     As shown in  FIG. 20 , conductive member  42 , conductive member  43 , and wiring member  20 A are provided across multiple solar cells  10  on an approximately straight line. 
     The second embodiment is similar to the first embodiment in that conductive member  42  is provided in groove  32  of wiring substrate  30 , and conductive member  43  is provided in groove  33  of wiring substrate  30 . Similarly, the second embodiment is similar to the first embodiment in that wiring member  20 A is provided in groove  34  of wiring substrate  30 . That is, the grooves of wiring substrate  30  (groove  32 , groove  33 , and groove  34 ) are provided across multiple solar cells  10  on an approximately straight line. 
     Also, in the second embodiment, groove  32  is provided along second electrode  12 D of the first conductivity type instead of second rear surface electrode  12 B. Similarly, groove  33  is provided along second electrode  13 D of the second conductivity type instead of second light-receiving surface electrode  13 B. 
     (Connection Between Solar Cells) 
     In the following, the connection between the solar cells according to the second embodiment is described with reference to the drawing.  FIG. 21  is a view showing the cross sections of solar cell  10  and wiring substrate  30  according to the second embodiment. Specifically,  FIG. 21  is a view showing the cross sections (taken along the line G-G shown in  FIG. 20 ) of solar cell  10  and wiring substrate  30 . 
     As shown in  FIG. 21 , second electrode  12 D of the first conductivity type of solar cell  10 X is electrically connected to wiring member  20 A via conductive member  42 . On the other hand, second electrode  13 D of the second conductivity type of solar cell  10 Y is electrically connected to wiring member  20 A via conductive member  43 . Thus, second electrode  12 D of the first conductivity type of solar cell  10 X and second electrode  13 D of the second conductivity type of solar cell  10 Y are electrically connected to each other by wiring member  20 A. 
     (Operations and Effects) 
     According to the second embodiment, in solar cell module  100  in which the electrodes are grouped together on the rear surface side, effects similar to those in the first embodiment can be obtained. 
     Modification Example 1 
     In the following, modification example 1 of the second embodiment is described with reference to the drawing. In the following, points of modification example 1 different from those of the second embodiment are mainly described. 
     Specifically, in modification example 1, the pattern of the electrodes is different from that of the second embodiment. In modification example 1, an elastic member is provided between the bottom of the grooves (groove  32  and groove  33 ), and the conductive member (conductive member  42  and conductive member  43 ). 
     (Arrangement of Solar Cells) 
     In the following, the arrangement of the solar cells according to modification example 1 is described with reference to the drawing.  FIG. 22  is a view showing the arrangement of solar cells  10  according to modification example 1.  FIG. 22  is a view of solar cells  10  viewed from the rear surface side. 
     Here, solar cell  10 X and solar cell  10 Y out of multiple solar cells  10  are described as an example. Solar cell  10 X and solar cell  10 Y are solar cells  10  adjacent to each other in solar cell array  110 . 
     In modification example 1, solar cell  10 X and solar cell  10 Y have a similar configuration as shown in  FIG. 22 . Also, the direction of solar cell  10 X is the same as that of solar cell  10 Y. 
     Here, first electrode  12 C of the first conductivity type has a linear shape extending in arrangement direction A. Second electrode  12 D of the first conductivity type has a linear shape extending in arrangement direction B. Second electrode  12 D of the first conductivity type is provided at an end of solar cell  10  in arrangement direction A. 
     Also, first electrode  13 C of the second conductivity type has a linear shape extending in arrangement direction A. second electrode  13 D of the second conductivity type has a linear shape extending in arrangement direction D. Second electrode  13 D of the second conductivity type is provided at an end of solar cell  10  in arrangement direction A. 
     Second electrode  13 D of the second conductivity type is provided at an end of solar cell  10  in arrangement direction A. 
     In modification example 1, second rear surface electrode  12 B of solar cell  10 X and second light-receiving surface electrode  13 B of solar cell  10 Y are provided in arrangement direction B at the boundary between solar cell  10 X and solar cell  10 Y. 
     (Configuration of Wiring Substrate) 
     In the following, the configuration of the wiring substrate according to modification example 1 is described with reference to the drawing.  FIG. 23  is a view showing wiring substrate  30  according to modification example 1. 
     Here, the case is illustrated where wiring substrate  30  covers rear surface  11 N of solar cell  10 X and rear surface  11 N of solar cell  10 Y.  FIG. 23  is a view showing one of the faces of wiring substrate  30 , which is opposed to rear surface  11 N. 
     As shown in  FIG. 23 , conductive member  42 , conductive member  43 , and wiring member  20 A have a shape extending in arrangement direction B at the boundary between solar cell  10 X and solar cell  10 Y. 
     Modification example 1 is similar to the first embodiment in that conductive member  42  is provided in groove  32  of wiring substrate  30 , and conductive member  43  is provided in groove  33  of wiring substrate  30 . Similarly, modification example 1 is similar to the first embodiment in that wiring member  20 A is provided in groove  34  of wiring substrate  30 . That is, the grooves of wiring substrate  30  (groove  32 , groove  33 , and groove  34 ) have a shape extending in arrangement direction B at the boundary between solar cell  10 X and solar cell  10 Y. 
     (Connection Between Solar Cells) 
     In the following, the connection between the solar cells according to modification example 1 is described with reference to the drawings.  FIGS. 24 and 25  are views showing the cross sections of solar cell  10  and wiring substrate  30  according to modification example 1. Specifically,  FIG. 24  is a view showing the cross sections (taken along the line H-H shown in  FIG. 23 ) of solar cell  10  and wiring substrate  30 .  FIG. 25  is a view showing the cross sections (taken along the line I-I shown in  FIG. 23 ) of solar cell  10  and wiring substrate  30 . 
     As shown in  FIG. 24 , second electrode  12 D of the first conductivity type of solar cell  10 X is electrically connected to wiring member  20 A via conductive member  42 . On the other hand, second electrode  12 D of the first conductivity type of solar cell  10 X is insulated from second electrode  12 D of the first conductivity type of solar cell  10 Y by wiring substrate  30  (insulator  31 ). 
     As shown in  FIG. 25 , second electrode  13 D of the second conductivity type of solar cell  10 Y is electrically connected to wiring member  20 A via conductive member  43 . On the other hand, second electrode  13 D of the second conductivity type of solar cell  10 Y is insulated from second electrode  13 D of the second conductivity type of solar cell  10 X by wiring substrate  30  (insulator  31 ). 
     As shown in  FIG. 25 , second electrode  13 D of the second conductivity type of solar cell  10 Y is insulated from conductive member  3 D. 
     In this manner, second electrode  12 D of the first conductivity type of solar cell  10 X and second electrode  13 D of the second conductivity type of solar cell  10 Y are electrically connected to each other by wiring member  20 A. 
     Also, elastic member  52  is provided between the bottom of groove  32  and conductive member  42  as shown in  FIGS. 24 and 25 . Also, elastic member  53  is provided between the bottom of groove  33  and conductive member  43 . For elastic member  52  and elastic member  53 , a rubber resin, a silicone resin, a urethane resin, an epoxy resin, a resin having a porous structure, and the like may be used. 
     (Operations and Effects) 
     In modification example 1, second rear surface electrode  12 B of solar cell  10 X and second light-receiving surface electrode  13 B of solar cell  10 Y are provided in arrangement direction B at the boundary between solar cell  10 X and solar cell  10 Y. 
     Thus, the grooves of wiring substrate  30  (groove  32 , groove  33 , and groove  34 ) are grouped together into one groove at the boundary of multiple solar cells  10 . That is, the pattern of the grooves of wiring substrate  30  is simple. 
     In modification example 1, elastic member  52  is provided between the bottom of groove  32  and conductive member  42 , and elastic member  53  is provided between the bottom of groove  33  and conductive member  43 . Consequently, the stress generated when wiring substrate  30  is bonded to photoelectric conversion body  11  is relieved by elastic member  52  and elastic member  53 . 
     Third Embodiment 
     In the following, the third embodiment is described with reference to the drawings. In the following, points of the third embodiment different from those of the first embodiment are mainly described. 
     Specifically, in the first embodiment, first light-receiving surface electrode  13 A is provided on light-receiving surface  11 M of photoelectric conversion body  11 . Second light-receiving surface electrode  13 B is provided on rear surface  11 N of photoelectric conversion body  11 . On the contrary, in the third embodiment, both of first light-receiving surface electrode  13 A and second light-receiving surface electrode  13 B are provided on light-receiving surface  11 M of photoelectric conversion body  11 . 
     (Configuration of Solar Cell Module) 
     In the following, the configuration of a solar cell module according to the third embodiment is described with reference to the drawings.  FIG. 26  is a view showing the configuration of solar cell module  100  according to the third embodiment. Note that  FIG. 26  is a view showing a cross section of solar cell module  100 . 
     As shown in  FIG. 26 , solar cell module  100  has light-receiving surface member  310 , rear surface member  320 , and sealing material  330 . The configuration of light-receiving surface member  310 , rear surface member  320 , and sealing material  330  is similar to that of the first embodiment. 
     In the third embodiment, wiring substrate  30 A is provided at the rear surface side of multiple solar cells  10 . Moreover, wiring substrate  30 B is provided at the light-receiving surface side of multiple solar cells  10 . 
     (Configuration of Solar Cell) 
     In the following, the configuration of the solar cell according to the third embodiment is described with reference to the drawings.  FIGS. 27 and 28  are views showing the configuration of solar cell  10  according to the third embodiment. Note that  FIG. 27  is a view of solar cell  10  viewed from the rear surface that is provided on the opposite side to the light-receiving surface which receives irradiated light.  FIG. 28  is a view of solar cell  10  viewed from the light-receiving surface that receives irradiated light. 
     As shown in  FIG. 27 , first rear surface electrode  12 A and second rear surface electrode  12 B are provided on rear surface  11 N of photoelectric conversion body  11 . Multiple first rear surface electrodes  12 A are provided with a predetermined space therebetween. Second rear surface electrode  12 B intersects with multiple first rear surface electrodes  12 A in rear surface  11 N of photoelectric conversion body  11 . 
     As shown in  FIG. 28 , first light-receiving surface electrode  13 A and second light-receiving surface electrode  13 B are provided on rear surface  11 M of photoelectric conversion body  11 . Multiple first light-receiving surface electrodes  13 A are provided with a predetermined space therebetween. Second light-receiving surface electrode  13 B intersects with multiple first light-receiving surface electrodes  13 A in light-receiving surface  11 M of photoelectric conversion body  11 . 
     In the third embodiment, similarly to the first embodiment, the first conductivity type region is formed in light-receiving surface  11 M of photoelectric conversion body  11 , and the second conductivity type region is formed in rear surface  11 N of photoelectric conversion body  11 . 
     (Connection Between Solar Cells) 
     In the following, the connection between the solar cells according to the third embodiment is described with reference to the drawing. FIG.  29  is a view showing the cross sections of solar cell  10 , wiring substrate  30 A, and wiring substrate  30 B according to the third embodiment. Here, the case is illustrated where wiring substrate  30 A and wiring substrate  30 B cover rear surface  11 N of solar cell  10 X and rear surface  11 N of solar cell  10 Y. 
     As shown in  FIG. 29 , second light-receiving surface electrode  13 B of solar cell  10 X is electrically connected to wiring member  20 A via conductive member  43 . On the other hand, second rear surface electrode  12 B of solar cell  10 Y is electrically connected to wiring member  20 A via conductive member  42 . Consequently, second light-receiving surface electrode  13 B of solar cell  10 X and second rear surface electrode  12 B of solar cell  10 Y are electrically connected to each other by wiring member  20 A. 
     Here, in the third embodiment, wiring substrate  30 A is provided with groove  32 , and wiring substrate  30 B is provided with groove  33 . The third embodiment is similar to the first embodiment in that groove  32  is provided along second rear surface electrode  12 B, and groove  33  is provided along second light-receiving surface electrode  13 B. Also, the third embodiment is similar to the first embodiment in that groove  32  is provided with conductive member  42 , and groove  33  is provided with conductive member  43 . 
     Other Embodiments 
     In each embodiment, the case has been illustrated where wiring substrate  30  covers the main surfaces the light-receiving surface or the rear surface) of two solar cells  10 . However, the invention is not limited to this case. Specifically, wiring substrate  30  may cover the main surfaces (the light-receiving surface or the rear surface) of three or more solar cells  10 . Also, wiring substrate  30  may cover two or more solar cells  10  both within solar cell array  110  and between solar cell strings  110 . 
     Although not specifically mentioned in the embodiments, the entire region in which wiring substrate  30  is disposed is preferably at the inner side of the entire region in which solar cells  10  are disposed. Thereby, an increase of the size of solar cell module  100  can be suppressed. 
     As a matter of course, the elastic members shown in modification example 1 of the first embodiment and in modification example 2 of the second embodiment (elastic member  52  and elastic member  53 ) can be applied to other embodiments or modification examples. 
     As shown in the first embodiment, wiring substrate  30  across solar cell arrays  110  can be applied to other embodiments or modification examples, as a matter of course. 
     The above-described related technology has no specific reference for alignment of the wiring substrate with the solar cell, thus the above-mentioned alignment is difficult. Especially, in the case where a wiring substrate is provided across multiple solar cells in a solar cell module, the alignment of the wiring substrate with the multiple solar cells is more difficult. 
     According to the embodiments above, solar cell modules that enable easy alignment of wiring substrate with solar cells is provided, and also simplified manufacturing process. 
     The invention includes other embodiments in addition to the above-described embodiments without departing from the spirit of the invention. The embodiments are to be considered in all respects as illustrative, and not restrictive. The scope of the invention is indicated by the appended claims rather than by the foregoing description. Hence, all configurations including the meaning and range within equivalent arrangements of the claims are intended to be embraced in the invention.