Patent Publication Number: US-2023163093-A1

Title: Semiconductor device

Description:
BACKGROUND OF THE INVENTION 
     Field of the Invention 
     The present disclosure relates to a semiconductor device. 
     Description of the Background Art 
     Japanese Patent Application Laid-Open No. 2014-120679 proposes a semiconductor device in which a reinforcing wire such as a disconnection preventing wire is connected to a peripheral portion of a semiconductor element. According to such a semiconductor device, it is possible to suppress, with the reinforcing wire, peeling of the sealing resin caused by concentration of repeated thermal stress. 
     Since the reinforcing wire of Japanese Patent Application Laid-Open No. 2014-120679 is connected to a peripheral portion of a semiconductor element, peeling of a sealing resin in the peripheral portion can be suppressed. However, the reinforcing wire of Japanese Patent Application Laid-Open No. 2014-120679 does not act on the semiconductor element, so that there is no effect of directly suppressing peeling of the sealing resin from the semiconductor element. Therefore, there has been a possibility that the sealing resin is peeled off from the semiconductor element under an actual use environment. 
     SUMMARY 
     A semiconductor device according to the present disclosure includes: at least one semiconductor element; a main wiring wire electrically connected to the at least one semiconductor element; a reinforcing wire connected to the at least one semiconductor element, the reinforcing wire positioned on the same side as the at least one semiconductor element or on the opposite side of the at least one semiconductor element with respect to the main wiring wire in a cross-sectional view; and a sealing resin configured to cover the at least one semiconductor element, the main wiring wire, and the reinforcing wire. The reinforcing wire is connected to a plurality of portions of the at least one semiconductor element, or both end portions of the reinforcing wire are positioned inside an outline of the at least one semiconductor element in a plan view. 
     It is possible to suppress peeling of the sealing resin from the semiconductor element. 
     These and other objects, features, aspects and advantages of the present disclosure become more apparent from the following detailed description of the present disclosure when taken in conjunction with the accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a cross-sectional view showing a configuration of a semiconductor device according to a first preferred embodiment; 
         FIG.  2    is a plan view showing a configuration of a semiconductor device according to a second preferred embodiment; 
         FIG.  3    is a three-dimensional view showing a configuration of the semiconductor device according to the second preferred embodiment; 
         FIG.  4    is a cross-sectional view showing a configuration of a semiconductor device according to a third preferred embodiment; 
         FIG.  5    is a plan view showing a configuration of the semiconductor device according to the third preferred embodiment; 
         FIG.  6    is a three-dimensional view showing a configuration of the semiconductor device according to the third preferred embodiment; 
         FIG.  7    is a cross-sectional view showing a configuration of a semiconductor device according to a fourth preferred embodiment; 
         FIG.  8    is a plan view showing a configuration of the semiconductor device according to the fourth preferred embodiment; 
         FIG.  9    is a plan view showing a configuration of a semiconductor device according to a modification of the fourth preferred embodiment; 
         FIG.  10    is a cross-sectional view showing a configuration of a semiconductor device according to a fifth preferred embodiment; 
         FIG.  11    is a plan view showing a configuration of the semiconductor device according to the fifth preferred embodiment; 
         FIG.  12    is a plan view showing a configuration of a semiconductor device according to a modification of the fifth preferred embodiment; 
         FIG.  13    is a cross-sectional view showing a configuration of a semiconductor device according to a sixth preferred embodiment; 
         FIGS.  14  and  15    are three-dimensional views each showing a configuration of the semiconductor device according to the sixth preferred embodiment; 
         FIG.  16    is a plan view showing a configuration of a semiconductor device according to a seventh preferred embodiment; 
         FIG.  17    is a plan view showing a configuration of a semiconductor device according to a modification of the seventh preferred embodiment; 
         FIG.  18    is a plan view showing a configuration of a semiconductor device according to an eighth preferred embodiment; and 
         FIG.  19    is a plan view showing a configuration of a semiconductor device according to a modification of the eighth preferred embodiment. 
     
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Hereinafter, preferred embodiments will be described with reference to the accompanying drawings. Features described in the following preferred embodiments are illustrative, and all features are not necessarily essential. In addition, in the following description, similar components in a plurality of preferred embodiments are denoted by the same or similar reference numerals, and different components will be mainly described. In addition, in the following description, a specific position and direction such as “upper”, “lower”, “left”, “right”, “front”, or “back” do not necessarily need to coincide with a position and direction at the time of actual implementation. 
     First Preferred Embodiment 
       FIG.  1    is a cross-sectional view showing a configuration of a semiconductor device according to the present first preferred embodiment. The semiconductor device in  FIG.  1    is, for example, a power semiconductor device. The semiconductor device in  FIG.  1    includes an element mounting portion  1 , a joint member  2 , a semiconductor element  3 , a main wiring wire  4 , a reinforcing wire  5 , a sealing resin  6 , and a case and an external connection terminal (not shown). It should be noted that when the main wiring wire  4  and the reinforcing wire  5  are not distinguished from each other in the following description, these may be described only as wires. 
     The element mounting portion  1  includes an insulating layer  1   b,  a back-surface metal plate  1   a  provided on the lower surface of the insulating layer  1   b,  and a metal circuit pattern  1   c  provided on the upper surface of the insulating layer  1   b.  The element mounting portion  1  may be, for example an insulated metal baseplate (IMB) in which a direct bonded copper (DBC) substrate or a resin substrate is used as the insulating layer  1   b.  In addition, the semiconductor device according to the present first preferred embodiment may have a transfer mold structure in which a lead frame is used for the metal circuit pattern  1   c,  or may have a full transfer mold structure in which the insulating layer  1   b  and the back-surface metal plate  1   a  are omitted. 
     The joint member  2  electrically and mechanically connects the semiconductor element  3  to the metal circuit pattern  1   c  by joining the semiconductor element  3  and the metal circuit pattern  1   c  of the element mounting portion  1 . The material of the joint member  2  is, for example, solder, a sintered material, or a conductive adhesive. 
     The semiconductor element  3  includes a front surface electrode  3   a  provided on the upper surface. The semiconductor element  3  is, for example, an insulated gate bipolar transistor (IGBT), a reverse conducting-IGBT (RC-IGBT), a metal oxide semiconductor field effect transistor (MOSFET), a PN junction diode (PND), a Schottky barrier diode (SBD), or a free wheeling diode (FWD), and transmits and receives an electric signal to and from an external apparatus through the main wiring wire  4 , the metal circuit pattern  1   c,  an external connection terminal (not shown), and the like. 
     The material of the element  3  may be normal silicon (Si) or a wide band gap semiconductor such as silicon carbide (SiC), gallium nitride (GaN), or diamond. When the material of the semiconductor element  3  is a wide band gap semiconductor, stable operation under high temperature and high voltage, and higher switching speed can be achieved. It should be noted that the number of semiconductor elements  3  may be one or more. 
     One or more main wiring wires  4  are electrically connected to a front surface electrode  3   a  of a semiconductor element  3 , and electrically connected to an external connection terminal or a metal circuit pattern  1   c.    
     The reinforcing wire  5  is connected to the semiconductor element  3 . It should be noted that the reinforcing wire  5  may be electrically and mechanically connected to the semiconductor element  3 , or may be mechanically connected without being electrically connected to the semiconductor element  3 . 
     In the present first preferred embodiment, in a cross-sectional view, the reinforcing wire  5  is positioned on the semiconductor element  3  side with respect to the main wiring wire  4 , that is, below the loop of the main wiring wire  4 . It should be noted that as will be described in another preferred embodiment, in the cross-sectional view, the reinforcing wire  5  may be positioned on the opposite side of the semiconductor element  3  with respect to the main wiring wire  4 , that is, above the loop of the main wiring wire  4 . 
     In the present first preferred embodiment, the reinforcing wire  5  is connected to a plurality of portions of the semiconductor element  3 , and both ends of the reinforcing wire  5  are positioned inside the outline of the semiconductor element  3  in a plan view. It should be noted that a configuration in which the reinforcing wire  5  is connected to a plurality of portions of the semiconductor element  3 , and both ends of the reinforcing wire  5  are not positioned inside the outline of the semiconductor element  3  in a plan view may be used. Alternatively, a configuration in which the reinforcing wire  5  is not connected to a plurality of portions of the semiconductor element  3 , and both ends of the reinforcing wire  5  are positioned inside the outline of the semiconductor element  3  in a plan view may be used. These configurations will be described in another preferred embodiment. 
     In the present first preferred embodiment, the reinforcing wire  5  is provided on substantially the entire surface of the semiconductor element  3 , but as will be described in another preferred embodiment, the reinforcing wire  5  may be provided to be limited around the connection portion between the semiconductor element  3  and the main wiring wire  4 . 
     The case (not shown) is connected to the element mounting portion  1 , and surrounds the joint member  2 , the semiconductor element  3 , the main wiring wire  4 , the reinforcing wire  5 , and a space therearound. One end of the external connection terminal is provided in the space of the case, and the other end of the external connection terminal is provided outside the case. 
     The sealing resin  6  is filled in the space of the case, and covers and protects the joint member  2 , the semiconductor element  3 , the main wiring wire  4 , and the reinforcing wire  5 . 
     Summary of First Preferred Embodiment 
     In the present first preferred embodiment, since not only the main wiring wire  4  but also the reinforcing wire  5  is connected onto the semiconductor element  3 , the number of wire connections per unit area of the upper surface of the semiconductor element  3  increases. Accordingly, since it is possible to enhance the anchor effect of the sealing resin  6  by the wire, it is possible to enhance the effect of suppressing peeling of the sealing resin  6  from the semiconductor element  3 , that is, the peeling suppression effect. 
     In addition, since the ratio of the resin of the sealing resin  6  per unit volume of the portion on the semiconductor element  3  decreases and the ratio of the metal of the wire increases, the linear expansion coefficient of the portion can be brought close to the linear expansion coefficient of the front surface electrode  3   a  of the semiconductor element  3 . As a result, it is possible to suppress peeling due to thermal stress generated by a mismatch between the linear expansion coefficient of the resin and the linear expansion coefficient of the front surface electrode  3   a.  It should be noted that when the material of the reinforcing wire  5  and the material of the front surface electrode  3   a  are the same, improvement in this effect can be expected. In addition, since the heat capacity of the portion on the semiconductor element  3  can be increased by the reinforcing wire  5 , the junction temperature Tj at the time of energization can be lowered, and uniformity of the temperature distribution can be expected. 
     In addition, in the present first preferred embodiment, the reinforcing wire  5  is positioned on the semiconductor element  3  side with respect to the main wiring wire  4  in a cross-sectional view. According to this configuration, since it is possible to suppress the position change of the connection portion of the main wiring wire  4  accompanying providing the reinforcing wire  5 , it is possible to facilitate the design change from the existing article. 
     Second Preferred Embodiment 
       FIG.  2    is a plan view showing a configuration of a semiconductor device according to the present second preferred embodiment, and  FIG.  3    is a three-dimensional view showing the configuration. In the present second preferred embodiment, the semiconductor element  3  includes an ineffective region  10  and an effective region  11  provided on the upper surface. The ineffective region  10  surrounds the effective region  11 . The effective region  11  corresponds to a region where the front surface electrode  3   a  in  FIG.  1    is provided, and a plurality of portions of the effective region  11  are connected to the main wiring wire  4  and the reinforcing wire  5 . Then, in the present second preferred embodiment, as shown in  FIG.  2   , the reinforcing wire  5  is parallel to the main wiring wire  4  in a plan view. 
     It should be noted that in  FIG.  2   , the reinforcing wire  5  is shifted from the main wiring wire  4  in a plan view, but the reinforcing wire  5  may overlap the main wiring wire  4  in a plan view. In a plan view in  FIG.  2    and the like, the connection portion where the semiconductor element  3  is bonded to each of the main wiring wire  4  and the reinforcing wire  5  is shown in a circular shape, but the shape of the connection portion is not limited to the circular shape. In addition, in a plan view in  FIG.  2    and the like, the main wiring wire  4  and the reinforcing wire  5  are partitioned at the connection portion with the semiconductor element  3  for convenience, but do not need to be partitioned. 
     Summary of Second Preferred Embodiment 
     In the present second preferred embodiment, since the reinforcing wire  5  is parallel to the main wiring wire  4  in a plan view, when the sealing resin  6  is injected in the manufacturing step of the semiconductor device as shown in  FIG.  3   , the sealing resin  6  easily flows along the arrangement of the wires. Therefore, air voids generated by the sealing resin  6  entraining air during the flow are suppressed, and the filling property of the sealing resin  6  is improved, so that the insulating characteristics of the semiconductor device can be improved. 
     Third Preferred Embodiment 
       FIG.  4    is a cross-sectional view showing a configuration of a semiconductor device according to the present third preferred embodiment, and  FIGS.  5  and  6    are a plan view and a three-dimensional view showing the configuration, respectively. It should be noted that in a plan view in  FIG.  5    and the like, for convenience, a white line is attached to the outline of the wire positioned on the front side at a place where the wires intersect. The configuration of the present third preferred embodiment is different from the configuration of the second preferred embodiment in that the reinforcing wire  5  intersects the main wiring wire  4  in a plan view. It should be noted that in  FIG.  5   , the main wiring wire  4  and the reinforcing wire  5  are orthogonal to each other, but do not necessarily need to be orthogonal to each other. 
     Summary of Third Preferred Embodiment 
     The anchor effect of the sealing resin  6  by the wire occurs in the upper direction and the extending direction of the wire. Therefore, when the wires intersect with each other, an anchor effect occurs in the upper direction of the main wiring wire  4  and the reinforcing wire  5  and in two extending directions different from each other of the main wiring wire  4  and the reinforcing wire  5 . According to the present third preferred embodiment as described above, since the anchor effect is generated in directions more than directions of the second preferred embodiment, further improvement in the peeling suppression effect can be expected. 
     Fourth Preferred Embodiment 
       FIG.  7    is a cross-sectional view showing a configuration of a semiconductor device according to the present fourth preferred embodiment, and  FIG.  8    is a plan view showing the configuration. In the first to third preferred embodiments, the reinforcing wire  5  is positioned on the semiconductor element  3  side with respect to the main wiring wire  4  in a cross-sectional view. On the other hand, in the present fourth preferred embodiment, in the cross-sectional view, the reinforcing wire  5  is positioned on the opposite side of the semiconductor element  3  with respect to the main wiring wire  4 , that is, above the loop of the main wiring wire  4 . In  FIGS.  7  and  8   , the reinforcing wire  5  is positioned above the main wiring wire  4  on the semiconductor element  3  and intersects with the main wiring wire  4 . It should be noted that in  FIGS.  7  and  8   , the present fourth preferred embodiment is applied to the third preferred embodiment, but may be applied to the second preferred embodiment. 
       FIG.  8    shows a structure in which the main wiring wire  4  is connected to the metal circuit pattern  1   c  of the element mounting portion  1 . The semiconductor element  3  transmits and receives an electric signal to and from an external apparatus through the main wiring wire  4 , the metal circuit pattern  1   c,  an external output terminal, and the like. 
     Summary of Fourth Preferred Embodiment 
     In the present fourth preferred embodiment, the reinforcing wire  5  is positioned on the opposite side of the semiconductor element  3  with respect to the main wiring wire  4  in a cross-sectional view. According to this configuration, since the connection region of the reinforcing wire  5  can be expanded, the number of reinforcing wires  5  connectable to the semiconductor element  3  can be increased. For example, when the reinforcing wire  5  having a length of 200 μm is connected to the semiconductor element  3  having a size of 5 mm×5 mm, the number of connectable reinforcing wires  5  is about 4 in the third preferred embodiment, but the number of connectable reinforcing wires  5  can be increased to about 8 in the present fourth preferred embodiment. As a result, since the anchor effect of the scaling resin  6  by the wire is improved, further improvement in the peeling suppression effect can be expected. 
     &lt;Modification&gt; 
       FIG.  9    is a plan view showing a configuration of a semiconductor device according to the present modification of the fourth preferred embodiment. The semiconductor device according to the present modification further includes a connecting reinforcing wire  7  that electrically connects the reinforcing wire  5  and the metal circuit pattern  1   c.  According to this configuration, since the reinforcing wire  5  can play a role of transmitting and receiving an electric signal, it is possible to compensate for a current density insufficient when the number of the main wiring wires  4  is reduced. 
     Fifth Preferred Embodiment 
       FIG.  10    is a cross-sectional view showing a configuration of a semiconductor device according to the present fifth preferred embodiment, and  FIG.  11    is a plan view showing the configuration. In the present fifth preferred embodiment, the reinforcing wire  5  is positioned on the opposite side of the semiconductor element  3  with respect to the connection portion  4   a  between the main wiring wire  4  and the semiconductor clement  3  in a cross-sectional view. That is, the reinforcing wire  5  is positioned on the connection portion  4   a  of the main wiring wire  4 . 
     Then, the height of the reinforcing wire  5  with respect to the semiconductor element  3  is lower than the height of the main wiring wire  4  with respect to the semiconductor element  3 . In the example in  FIG.  10   , the height of the top portion of the loop of the reinforcing wire  5  is lower than the height of the top portion of the loop of the main wiring wire  4 . 
     Summary of Fifth Preferred Embodiment 
     According to the configuration of the present fifth preferred embodiment, since the reinforcing wire  5  is close to the connection portion  4   a  of the main wiring wire  4 , the anchor effect can be enhanced around the connection portion  4   a  of the main wiring wire  4 , and peeling of the sealing resin  6  from the connection portion  4   a  can be intensively suppressed. In addition, as a result, since the number of reinforcing wires  5  can be reduced, the cycle time of the semiconductor device can be shortened, and the productivity can be enhanced. 
     &lt;Modification&gt; 
       FIG.  12    is a plan view showing a configuration of a semiconductor device according to the present modification of the fifth preferred embodiment. In the present modification, the reinforcing wire  5  is connected to a plurality of portions of the semiconductor element  3 . The plurality of portions includes a first portion  3   b,  a second portion  3   c,  and a third portion  3   d.    
     The first portion  3   b  is an end portion of the semiconductor element  3 . The second portion  3   c  is an end portion opposite to the first portion  3   b  of the semiconductor element  3 . It should be noted that the first portion  3   b  and the second portion  3   c  may be connected to the metal circuit pattern  1   c  by the connecting reinforcing wire  7 . The third portion  3   d  is a portion between the first portion  3   b  and the second portion  3   c.    
     According to this configuration, since the reinforcing wire  5  is connected not only to the first portion  3   b  and the second portion  3   c  being the end portions of the semiconductor element  3  but also to the third portion  3   d  being the central portion, the rigidity of the reinforcing wire  5  can be enhanced. Accordingly, since deformation of the reinforcing wire  5  due to repeated thermal stress can be suppressed, a stronger anchor effect can be obtained and the peeling suppression effect can be further enhanced. 
     It should be noted that in the fifth preferred embodiment and the modification thereof the reinforcing wire  5  is electrically connected to the semiconductor element  3 , but does not need to be electrically connected. 
     Sixth Preferred Embodiment 
       FIG.  13    is a cross-sectional view showing a configuration of a semiconductor device according to the present sixth preferred embodiment.  FIG.  14    is a three-dimensional view showing a configuration of the semiconductor element  3  on the left side in  FIG.  13   , and  FIG.  15    is a three-dimensional view showing a configuration of the semiconductor element  3  on the right side in  FIG.  13   . 
     As shown in  FIG.  13   , the reinforcing wire  5  is positioned below the loop of the main wiring wire  4 , and both end portions of the reinforcing wire  5  are positioned inside the outline of the semiconductor element  3  in a plan view. Then, each reinforcing wire  5  is provided for each connection portion with the semiconductor element  3 . That is, a material wire is cut off every time the material wire is connected to the semiconductor element  3 , whereby a reinforcing wire  5  is formed. The reinforcing wire  5  has substantially the same function as a bump. 
     The angle formed by the main wiring wire  4  and the reinforcing wire  5  in a plan view is substantially 0 degrees in  FIG.  14    and substantially 90 degrees in  FIG.  15   , but is not limited thereto. When a thin wire having a diameter of 50 μm or less is used for the reinforcing wire  5 , the bump formed of the reinforcing wire  5  preferably has a ball bond shape. 
     Summary of Sixth Preferred Embodiment 
     In the present sixth preferred embodiment the reinforcing wire  5  forms a bump by being provided at each connection portion with the semiconductor element  3 . According to this configuration, it is possible to increase the number of connection places of the reinforcing wire  5  connectable to the semiconductor element  3 . For example, when the reinforcing wire  5  having a diameter of 200 μm is connected at a pitch of 3 mm without being separated, the number of connection places of the reinforcing wire  5  connectable to the semiconductor element  3  having a size of 10 mm×10 mm is four. On the other hand, in the present sixth preferred embodiment, since a bump made of the reinforcing wire  5  at a pitch of 2 mm or less can be connected to the semiconductor element  3  having the same size, the number of connection places of the connectable reinforcing wire  5  can be increased to five or more. As a result, since the anchor effect of the sealing resin  6  by the wire is improved, further improvement in the peeling suppression effect can be expected. 
     In addition, in general, the longer the loop of wire, the more the wire is affected by the expansion and contraction of the sealing resin  6  due to repeated thermal stress. However, in the present sixth preferred embodiment, the reinforcing wire  5  is a bump without a loop, and the influence can be reduced, so that the stress generated in the connection portion between the reinforcing wire  5  and the semiconductor element  3  can be alleviated. Therefore, improvement in the connection strength of the reinforcing wire  5  itself can also be expected. It should be noted that in the example in  FIG.  13   , the reinforcing wire  5  is positioned below the main wiring wire  4 , but a part of the reinforcing wire  5  may be configured to be positioned above the main wiring wire  4 . 
     Seventh Preferred Embodiment 
       FIG.  16    is a plan view showing a configuration of a semiconductor device according to the present seventh preferred embodiment. As shown in  FIG.  16   , in the present seventh preferred embodiment, the reinforcing wire  5  is not a linear wire but a plate-shaped ribbon wire. The reinforcing wire  5  being a ribbon wire is positioned below the loop of the main wiring wire  4 . It should be noted that in  FIG.  16   , all of the plurality of reinforcing wires  5  are ribbon wires, but some of the reinforcing wires  5  may be linear wires and the remaining reinforcing wires  5  may be ribbon wires. In addition, in  FIG.  16   , the connection portion between the semiconductor element  3  and the reinforcing wire  5  is shown in a rectangular shape, and the shape of the connection portion is not limited to a rectangular shape. In addition, in  FIG.  16   , the reinforcing wire  5  is positioned below the loop of the main wiring wire  4 , but may be positioned above the loop of the main wiring wire  4 . 
     Summary of Seventh Preferred Embodiment 
     In the present seventh preferred embodiment, since the reinforcing wire  5  is a ribbon wire, the area covering the upper surface of the semiconductor element  3  can be increased as compared with that of the linear wire, and the gap between the reinforcing wires  5  can be narrowed. Therefore, a stronger anchor effect can be obtained, and not only the peeling suppression effect can be further enhanced, but also the temperature uniformity of the portion on the semiconductor element  3  can be enhanced. 
     &lt;Modification&gt; 
       FIG.  17    is a plan view showing a configuration of a semiconductor device according to the present modification of the seventh preferred embodiment. As shown in  FIG.  17   , not only the reinforcing wire  5  but also the main wiring wire  4  may be a ribbon wire. By using the ribbon wire for both the main wiring wire  4  and the reinforcing wire  5 , the main wiring wire  4  and the reinforcing wire  5  can be formed with the same wire bonding apparatus, so that the introduction device cost can be suppressed or the productivity can be improved. 
     Eighth Preferred Embodiment 
       FIG.  18    is a plan view showing a configuration of a semiconductor device according to the present eighth preferred embodiment. The semiconductor device according to the present eighth preferred embodiment includes semiconductor elements  31  and  32  as a plurality of semiconductor elements  3  that perform the same switching operation. It should be noted that in  FIG.  18   , the number of the plurality of semiconductor elements performing the same switching operation is 2, but may be 3 or more. In  FIG.  18   , each of the semiconductor elements  31  and  32  includes five effective regions  11   a  to  11   e  being a plurality of pattern regions provided on the upper surface. It should be noted that the number of effective regions  11   a  to  11   e  has only to be plural and is not limited to five. 
     The connecting wire  5   a  being a part of the reinforcing wire  5  is connected between the semiconductor elements  31  and  32 . The remainder of the reinforcing wire  5  is connected to a plurality of portions of one or more semiconductor elements  31  and  32  as in the first preferred embodiment and the like. In  FIG.  18   , the remainder of each reinforcing wire  5  is electrically connected to any one of the semiconductor elements  31  and  32 , and is electrically connected to each of the five effective regions  11   a  to  11   e.    
     Summary of Eighth Preferred Embodiment 
     In the conventional technique, since a part of the main wiring wire  4  is used for a connecting wire for connecting between the plurality of semiconductor elements, the degree of freedom in designing the main wiring wire  4  is low, and the number of connecting wires is about 1 to 2. However, in the eighth preferred embodiment, since a part of the reinforcing wire  5  is a connecting wire  5   a,  the number of connecting wires can be increased. Therefore, the electric signal delay between the semiconductor elements  31  and  32  can be improved, the potential distribution can be equalized, and the signal oscillation suppression effect can be enhanced. 
     In addition, in the first to seventh preferred embodiments, the anchor effect of the sealing resin  6  by the wire is obtained only on the semiconductor element  3 , but in the present eighth preferred embodiment, since the anchor effect can be obtained between a plurality of semiconductor elements  3 , the peeling suppression effect can be further enhanced. 
     In general, when the reinforcing wire  5  is provided on the metal circuit pattern  1   c,  an anchor effect can be obtained, but when the metal circuit pattern  1   c  is provided between the plurality of semiconductor elements  3 , the distance between the plurality of semiconductor elements  3  becomes relatively large, and the size of the semiconductor device becomes large. On the other hand, in the present eighth preferred embodiment, the reinforcing wire  5  is provided between the plurality of semiconductor elements rather than being provided on the metal circuit pattern  1   c,  so that the distance between the plurality of semiconductor elements  3  can be shortened, and the size of the semiconductor device can be reduced. 
     In addition, in the present eighth preferred embodiment, a plurality of portions to which the reinforcing wires  5  are connected in the semiconductor element  3  are provided in each of the effective regions  11   a  to  11   e.  According to this configuration, the electric signal delay between the effective regions  11   a  to  11   e  can be improved, the potential distribution can be equalized, and the signal oscillation suppression effect can be enhanced. 
     &lt;Modification&gt; 
       FIG.  19    is a plan view showing a configuration of a semiconductor device according to the present modification of the eighth preferred embodiment. As shown in  FIG.  19   , a plurality of portions to which the reinforcing wires  5  are connected in the semiconductor element  3  are not provided in each of the effective regions  11   a  to  11   e,  but have only to be provided in two or more effective regions of the effective regions  11   a  to  11   e.  In  FIG.  19   , one reinforcing wire  5  is electrically connected to the effective regions  11   a,    11   c,  and  11   e,  and another reinforcing wire  5  is electrically connected to the effective regions  11   b  and  11   d.  According to this configuration, since the pitch of the connection portion between the reinforcing wire  5  and the effective regions  11   a  to  11   e  can be increased, the connection between the reinforcing wire  5  and the effective regions  11   a  to  11   e  can be facilitated even when the size of the semiconductor element  3  is reduced. 
     It should be noted that each of the preferred embodiments and each of the modifications can be freely combined, and each of the preferred embodiments and each of the modifications can be appropriately modified or omitted. 
     While the disclosure has been shown and described in detail, the foregoing description is in all aspects illustrative and not restrictive. It is therefore understood that numerous modifications and variations can be devised.