JP2013105884A - Semiconductor module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a semiconductor module which can inhibit detachment of an insulating member than in the past even when a temperature difference occurs.SOLUTION: A semiconductor module 10 comprises: a plurality of semiconductor elements 16; a heat radiation part 15 radiating heat generated in each semiconductor element 16; and an insulating member 14 covering at least the semiconductor elements 16. The insulating member 14 covers an entire surface of the semiconductor module or covers around a plurality of surfaces around the semiconductor module 10. According to this configuration, the insulating member 14 covers an entire surface of the semiconductor module 10 or covers a plurality of surfaces around the semiconductor module 10. Detachment of the insulating member 14 can be inhibited than in the past even when stress due to a linear expansion coefficient difference caused on the basis of a temperature difference occurring between the heat radiation part 15 and the insulating member 14.

Description

  The present invention relates to a semiconductor module including a plurality of semiconductor elements, a heat radiating portion, and an insulating member.

  Conventionally, an example of a technique related to a semiconductor cooling unit having excellent heat radiation efficiency and high shape accuracy has been disclosed (see, for example, Patent Document 1). This semiconductor cooling unit has two electrode plates (15) facing each other so as to sandwich the semiconductor element (11) with reference to paragraph number [0020] and the description of FIG. The cooling tube (20) is joined to the plate (15) with an insulating layer (30) interposed.

Japanese Patent Laid-Open No. 2005-093593

  However, according to the configuration of the semiconductor cooling unit disclosed in Patent Document 1, the insulating layer (30) is bonded to the entire surface of each electrode plate (15), and the cooling tube is bonded to the entire surface of the insulating layer (30). (20) is adhered. In general, since a large temperature difference is generated between the electrode plate (15) and the cooling tube (20), a stress due to a difference in coefficient of linear expansion is generated in the insulating layer (30). When the stress exceeds the adhesive force, there is a problem that peeling occurs from a part (mostly end face) of the insulating layer (30).

  The present invention has been made in view of such a point, and an object of the present invention is to provide a semiconductor module that can suppress peeling of an insulating member more than ever even if a temperature difference occurs.

  The invention according to claim 1, which has been made in order to solve the above-described problem, includes a plurality of semiconductor elements, a heat radiation part that releases heat generated in each of the semiconductor elements, and an insulating member that covers at least the semiconductor elements. In the module, the insulating member covers the entire surface of the semiconductor module or covers around a plurality of surfaces.

  According to this configuration, the insulating member covers the entire surface of the semiconductor module or covers around a plurality of surfaces. Even if a stress due to a difference in linear expansion coefficient based on a temperature difference generated between the heat dissipating part and the insulating member is generated, peeling of the insulating member can be suppressed as compared with the conventional case. In addition, when covering around, it does not ask | require the number of times of circulation.

  The “semiconductor element” corresponds to any semiconductor element that generates heat when energized. For example, semiconductor chips, FETs (specifically MOSFETs, JFETs, MESFETs, etc.), IGBTs, GTOs, power transistors, diodes, thyristors, etc. are applicable. As the “heat dissipating part”, any member capable of releasing heat generated in the semiconductor element can be applied, and any material, material, shape, etc. can be used. As the “insulating member”, any member can be applied as long as it has thermal conductivity and electrical insulation, and any material or material can be used.

  According to a second aspect of the present invention, when the insulating member wraps around and covers a plurality of surfaces of the semiconductor module, the insulating member covers all surfaces except for a surface having a connecting member that performs electrical connection with the external device. It is characterized by that. According to this configuration, all the surfaces of the surface of the semiconductor module except the surface having the connection member (hereinafter simply referred to as “non-connection surface”) go around and are covered with the insulating member. Even if a stress due to a difference in linear expansion coefficient based on a temperature difference generated between the heat dissipating part and the insulating member occurs, the peeling of the insulating member can be more reliably suppressed. The “connecting member” is arbitrary as long as it is a conductive member that can be electrically connected to an external device, regardless of whether it protrudes from the surface of the semiconductor module or is exposed on the surface. For example, a terminal, a lead, a pin, a bus bar, and the like are applicable.

  The invention according to claim 3 is characterized in that the insulating member has an overlapping portion that overlaps at least a part of the surface of the semiconductor module that does not include the heat dissipation portion, and integrates the overlapping portions. According to this configuration, the overlapping portions of the insulating member are integrated. Even if a stress due to a difference in linear expansion coefficient based on a temperature difference generated between the heat radiating portion and the insulating member is generated, the overlapping portion can more reliably suppress the peeling of the insulating member. In addition, the fixing means for the overlapping portion is arbitrary. For example, the adhesion which attaches an overlapping part using an adhesive, the welding which melts and overlaps an overlapping part, and the crimping | compression which compresses and attaches an overlapping part correspond.

  The invention according to claim 4 is characterized in that the overlapping portion is integrated by one or both of adhesion and welding. According to this configuration, since the overlapping portion is reliably integrated with one or both of adhesion and welding, the overlapping portion can more reliably suppress peeling of the insulating member.

  The invention according to claim 5 is characterized in that the insulating member has a conductor member on a surface opposite to a surface facing the semiconductor element. According to this configuration, the conductor member has a heat radiation action like the heat radiation portion. Since heat is radiated from the conductor member even if stress is generated due to the difference in the linear expansion coefficient due to the heat received by the insulating member, peeling of the insulating member can be more reliably suppressed. The “conductor member” is arbitrary as long as it is a material or material having a higher thermal conductivity than the insulating member. For example, copper (Cu), aluminum (Al), etc. correspond. The shape of the conductor member does not matter. That is, it may be formed in a shape related to the insulating member (for example, the same shape or a similar shape), or may be formed in a shape unrelated to the insulating member.

  The invention according to claim 6 is characterized in that the conductor member is integrally formed with the insulating member in advance. According to this configuration, since the insulating member and the conductor member are integrally formed in advance, the semiconductor element and the heat radiating portion may be covered thereafter. Since a process for bonding, bonding, and the like between the insulating member and the conductor member becomes unnecessary, the time required for manufacturing the semiconductor module can be shortened.

  The invention described in claim 7 is characterized in that the insulating member is an insulating film or an insulating sheet. According to this configuration, since the insulating film or the insulating sheet used as the insulating member is generally thin, the physique of the entire semiconductor module can be kept small.

It is a figure which shows typically the 1st structural example of a semiconductor module. It is a figure which shows typically the 2nd structural example of a semiconductor module. It is a figure which shows typically the 3rd structural example of a semiconductor module. It is a figure which shows typically the 4th structural example of a semiconductor module. It is a figure which shows typically the 5th structural example of a semiconductor module. It is a figure which shows typically the 6th structural example of a semiconductor module. It is a figure which shows typically the 7th structural example of a semiconductor module. It is a figure which shows typically the 8th structural example of a semiconductor module. It is a perspective view which shows typically the structural example of the heat absorption member (cooling device) which absorbs the heat which generate | occur | produces in a semiconductor module. It is sectional drawing which shows typically the structural example of the heat absorption member (cooling fin) which absorbs the heat which generate | occur | produces in a semiconductor module.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. Note that unless otherwise specified, “connecting” means electrically connecting. Each figure shows elements necessary for explaining the present invention, and does not necessarily show all actual elements. When referring to directions such as up, down, left and right, the description in the drawings is used as a reference.

[Embodiment 1]
The first embodiment is a first configuration example of a semiconductor module (so-called double-sided module) including two semiconductor elements, and will be described with reference to FIG. 1A is a plan view, and FIG. 1B is a cross-sectional view taken along the arrow IB-IB shown in FIG. Note that the heat radiation portion 15 and the semiconductor element 16, both of which are indicated by broken lines in FIG. 1A, have the same shape on a plane as shown in FIG. 1B. In any case, in order to clarify the existence of each element, they are merely shown in a similar shape for convenience (the same applies to FIG. 2 and subsequent figures).

  The semiconductor module 10 shown in FIGS. 1A and 1B is also referred to as a “semiconductor element package”, and includes a resin sealing portion 11, two heat radiation portions 15, two semiconductor elements 16, and the like. The resin sealing portion 11 is a sealing body for sealing each heat radiating portion 15 and each semiconductor element 16 to form a predetermined shape (for example, a polyhedron such as a rectangular parallelepiped). The sealing body is arbitrary as long as it is an insulating material capable of sealing the semiconductor element 16. For example, various resins such as epoxy resin (EP) and phenol resin (PF), thermosetting molding materials in which the resin is the main component and silica filler is added, heat resistant resins such as resin molds, This includes ceramics containing a metal oxide (for example, alumina) or an inorganic compound (for example, silicon nitride).

  Any member capable of releasing heat generated in the semiconductor element 16 can be applied to the heat radiating portion 15, and any material, material, shape, etc. can be used. The heat radiating portion 15 of this embodiment has a function of directly or indirectly contacting the semiconductor element 16 and radiating heat, and is formed of a material having a high thermal conductivity (for example, a metal plate such as a copper plate). Each heat radiating portion 15 is disposed so as to face the heat generating surface (the upper surface and the lower surface in the drawing) of each semiconductor element 16. The shape of the heat radiating portion 15 is arbitrary, and may be a flat plate shape as illustrated, or may be a curved surface shape according to the shape of the semiconductor element 16, the heat generation amount, or the like. It does not matter whether the plate thickness is uniform or non-uniform.

  Each of the two semiconductor elements 16 is formed of a semiconductor in an electric circuit that performs a target process. When used in a power conversion device such as an inverter or a converter, one semiconductor element 16 is used on the upper arm side, and the other semiconductor element 16 is used on the lower arm side. Each semiconductor element 16 corresponds to a semiconductor chip, a switching element, a driving circuit for driving the switching element, a freewheeling diode, or the like. Examples of the switching element include an FET (specifically, MOSFET, JFET, MESFET, etc.), IGBT, GTO, power transistor, diode, thyristor, and the like. Each semiconductor element 16 is connected in advance between the terminals 12 and 17 by wire bonding or the like (not shown).

  Each of the terminals 12 and 17 corresponds to a “connection member”, and is connected to an external device that inputs and outputs signals and power. In the configuration example of FIG. 1A, the terminal 12 is provided on the upper surface side, and the terminal 17 is provided on the lower surface side. It should be noted that on which surface the terminals are provided is arbitrary, and how many terminals are set is also arbitrary. An example of an external device connected to the terminal 12 is a controller (for example, an ECU or a computer) that individually inputs a signal to each semiconductor element 16. As an example of the external device connected to the terminal 17, a rotating electrical machine (for example, a generator, a motor, a motor generator, etc.), a power system, and the like are applicable. Since there are three terminals 17 in the configuration example of FIG. 1A, each terminal corresponds to a terminal that outputs three-phase (U-phase, V-phase, W-phase) power. Therefore, the number of terminals 17 varies depending on the number of phases of external devices to be connected.

  The insulating member 14 is thermally conductive, and any member can be applied as long as it has electrical insulation, regardless of material or material. The insulating member 14 of this embodiment uses an insulating film formed of an insulating resin, and is fixed by adhesion, welding, integral molding, or the like. As shown in FIG. 1B, the semiconductor element 10 is circulated around a plurality of surfaces of the semiconductor module 10 (in this example, four non-connection surfaces), and the semiconductor element 16 is covered via the heat dissipation portion 15. In the configuration example of FIG. 1B, it is formed with one turn (one layer), but it may be formed with two or more turns (two layers) or more.

  The conductor member 13 has a function of radiating heat transmitted from the heat radiation part 15 through the insulating member 14 to the outside, and is provided on a surface opposite to the surface facing the semiconductor element 16 (that is, the outer surface of the insulating member 14). The conductor member 13 of this embodiment is formed in an area wider than the total area of the two heat dissipating portions 15 on one surface (the upper surface or the lower surface in FIG. 1B), and is integrally formed with the insulating member 14 in advance by bonding or welding. The The conductor member 13 is optional as long as it is a material or material having a higher thermal conductivity than the insulating member 14. For example, copper (Cu), aluminum (Al), and the like are applicable. The thicknesses of the insulating member 14 and the conductor member 13 may be the same or different.

  According to the first embodiment described above, the following effects can be obtained. First, corresponding to claim 1, in the semiconductor module 10, the insulating member 14 is configured to surround and cover a plurality of surfaces of the semiconductor module 10 (see FIG. 1). According to this configuration, even if a stress due to a difference in linear expansion coefficient based on a temperature difference generated between the heat radiating portion 15 and the insulating member 14 is generated, it is possible to suppress the peeling of the insulating member 14 as compared with the related art.

  Corresponding to claim 2, when the insulating member 14 wraps around a plurality of surfaces of the semiconductor module 10, the insulating member 14 covers all surfaces except the surfaces having the terminals 12 and 17 (connection members), that is, the non-connection surfaces. (See FIG. 1). According to this configuration, even if a stress due to a difference in linear expansion coefficient based on a temperature difference generated between the heat radiating portion 15 and the insulating member 14 occurs, the peeling of the insulating member 14 can be more reliably suppressed.

  Corresponding to claim 5, the insulating member 14 has a conductor member 13 on the surface opposite to the surface facing the semiconductor element 16 (see FIG. 1). According to this configuration, since heat is radiated from the conductor member 13 even if stress is generated due to the difference in linear expansion coefficient due to the heat received by the insulating member 14, peeling of the insulating member 14 can be more reliably suppressed.

  Corresponding to claim 6, the conductor member 13 is previously formed integrally with the insulating member 14 (see FIG. 1). According to this configuration, since the insulating member 14 and the conductor member 13 are integrally formed in advance, the semiconductor element 16 and the heat radiating portion 15 may be covered thereafter. Since the process of bonding or joining the insulating member 14 and the conductor member 13 is not required, the time required for manufacturing the semiconductor module 10 can be shortened.

  Corresponding to claim 7, the insulating member 14 is an insulating film (see FIG. 1). According to this configuration, since the insulating film used as the insulating member 14 is generally thin, the overall size of the semiconductor module 10 can be kept small. Even when an insulating sheet is used instead of the insulating film, the same effect can be obtained.

[Embodiment 2]
The second embodiment is a second configuration example of a semiconductor module including two semiconductor elements as in the first embodiment, and will be described with reference to FIG. 2A is a plan view, and FIG. 2B is a cross-sectional view taken along the line IIB-IIB shown in FIG. In order to simplify the illustration and description, the second embodiment will be described with respect to differences from the first embodiment. Therefore, the same elements as those used in Embodiment 1 are denoted by the same reference numerals, and description thereof is omitted.

  The second embodiment differs from the first embodiment in the configuration of the insulating member 14. In the first embodiment, the semiconductor module 10 is configured to circulate on a plurality of surfaces (four unconnected surfaces in this example) (see FIG. 1B), whereas in the second embodiment, the insulating member 14 is provided. Is different in that it further has a superimposed portion. It has the superimposition part 18 shown in the ellipse of FIG. 2 (A) and FIG. 2 (B). The overlapping portion 18 is a portion where at least a part of the insulating member 14 is overlapped and integrated. The arrangement of the overlapping portion 18 is not limited to a surface (for example, the side surface in FIG. 2) of the semiconductor module 10 that does not include the heat radiating portion 15, but also a surface that includes the heat radiating portion 15. [mm], 10 [mm], etc.)

  The fixing means for the overlapping portion 18 (particularly the contact surface) is arbitrary. For example, one or both of the bonding that attaches the overlapping portion 18 using an adhesive and the welding that melts and attaches the overlapping portion 18 correspond to this. Other than adhesion and welding, crimping that compresses and attaches the overlapped portion 18 is applicable. Of these, two or more fixing means may be arbitrarily selected and performed.

  According to the second embodiment described above, the following effects can be obtained. Since the configuration of the semiconductor module 10 excluding the overlapping portion 18 is the same as that of the first embodiment, the effect corresponding to claims 1, 2, 5, and 6 is the same as that of the first embodiment.

  Corresponding to claim 3, the insulating member 14 has a superposition part 18 that overlaps at least a part of the surface of the semiconductor module 10 that does not include the heat radiating part 15, and is configured to integrate the superposition part 18 (see FIG. 2). reference). According to this configuration, even when a stress due to a difference in linear expansion coefficient based on a temperature difference generated between the heat radiating portion 15 and the insulating member 14 occurs, the overlapping portion 18 more reliably suppresses the peeling of the insulating member 14. Can do.

  Corresponding to claim 4, the overlapping portion 18 is integrated by one or both of adhesion and welding (see FIG. 2). According to this configuration, since the overlapping portion 18 is reliably integrated with one or both of adhesion and welding, the overlapping portion 18 can more reliably suppress peeling of the insulating member 14.

[Embodiment 3]
The third embodiment is a third configuration example of a semiconductor module including two semiconductor elements as in the first embodiment, and will be described with reference to FIG. 3A is a plan view, and FIG. 3B is a cross-sectional view taken along arrow IIIB-IIIB shown in FIG. In order to simplify the illustration and description, the third embodiment will be described with respect to differences from the first embodiment. Therefore, the same elements as those used in Embodiment 1 are denoted by the same reference numerals, and description thereof is omitted.

  The third embodiment differs from the first embodiment in the configuration of the conductor member 13. In the first embodiment, each conductor member 13 is formed to have a larger area than the total area of the two heat radiating portions 15 (see FIG. 1), whereas in the third embodiment, similarly to the insulating member 14. The semiconductor module 10 is different in that it circulates around a plurality of surfaces (in this example, four non-connection surfaces). That is, the insulating member 14 and the conductor member 13 are formed in the same shape and covered. The “same shape” includes different shapes within a predetermined allowable range (for example, within a range of ± X [mm] or ± Y [%]; X and Y are constants). In particular, if the conductor member 13 is integrally formed with the insulating member 14 in advance, it is only necessary to cover the semiconductor element 16 via the heat radiating portion 15, and the time required for manufacturing the semiconductor module 10 can be shortened.

  According to the third embodiment described above, since the configuration of the conductor member 13 is only different, the same effect as that of the first embodiment can be obtained.

[Embodiment 4]
The fourth embodiment is a fourth configuration example of a semiconductor module including two semiconductor elements as in the first embodiment, and will be described with reference to FIG. 4A is a plan view, and FIG. 4B is a cross-sectional view taken along the arrow IVB-IVB shown in FIG. 4A. In order to simplify the illustration and description, the fourth embodiment will be described with respect to differences from the first embodiment. Therefore, the same elements as those used in Embodiment 1 are denoted by the same reference numerals, and description thereof is omitted.

  The fourth embodiment differs from the first embodiment in the configuration of the insulating member 14. In the first embodiment, the semiconductor module 10 is configured to circulate around a plurality of surfaces (four non-connection surfaces in this example) (see FIG. 1), whereas in the fourth embodiment, the terminals 12 of the semiconductor module 10 are provided. , 17 except that it covers the entire surface. “Covering the entire surface of the semiconductor module 10” means covering at least the entire surface of the semiconductor element 16, and is actually a form of covering the entire surface of the resin sealing portion 11. In the following description, the same intention is used. Normally, the insulating member 14 is formed by a molding machine capable of integral molding (for example, an injection molding machine, a compression molding machine, etc.), but the insulating member 14 may be formed by a processing machine other than the molding machine.

  The conductor member 13 is formed in a larger area than the total area of the two heat dissipating parts 15 as in the first embodiment, and is fixed to the insulating member 14 covering the entire surface by adhesion or welding. In the same manner as the insulating member 14, the entire surface of the semiconductor module 10 except for the terminals 12 and 17 may be covered with the conductor member 13. However, since the conductor member 13 is conductive, it is necessary to provide a gap between the terminals 12 and 17 that ensures non-contact and a required insulation resistance.

  According to the fourth embodiment described above, corresponding to claim 1, in the semiconductor module 10, the insulating member 14 is configured to cover the entire surface of the semiconductor module 10 (see FIG. 4). According to this configuration, even if a stress due to a difference in linear expansion coefficient based on a temperature difference generated between the heat radiating portion 15 and the insulating member 14 is generated, it is possible to suppress the peeling of the insulating member 14 as compared with the related art. In the second, fifth, sixth, and seventh aspects, since only the configuration of the insulating member 14 is different, the same effect as the first embodiment can be obtained.

[Other Embodiments]
In the above, although the form for implementing this invention was demonstrated according to Embodiment 1-4, this invention is not limited to the said form at all. In other words, various forms can be implemented without departing from the scope of the present invention. For example, the following forms may be realized.

  In the first to fourth embodiments described above, the number of the semiconductor elements 16 provided in the semiconductor module 10 is set to two (see FIGS. 1 to 4). Instead of this form, it is also possible to apply to a semiconductor module 10 including a predetermined number of semiconductor elements 16. For example, as a configuration corresponding to the first embodiment, a configuration example of the semiconductor module 10 including three semiconductor elements 16 arranged in a tile in one column is illustrated in FIG. 5, and four semiconductor elements 16 are arranged in a tile in two rows and two columns. FIG. 6 shows a configuration example of the semiconductor module 10 including the above. Specifically, FIG. 5A shows a plan view, FIG. 5B shows a cross-sectional view taken along arrow VB-VB shown in FIG. 5A, and FIG. 6 shows a plan view. Note that the cross-sectional view taken along the arrow IB-IB shown in FIG. 6 has the same configuration as that in FIG. The “predetermined number” relating to the number of elements of the semiconductor element 16 can be arbitrarily set to 1 or more, but in reality, it is about several to a dozen. Although not shown, the semiconductor module 10 shown in the second to fourth embodiments can have the same configuration as that shown in FIGS. In any form, since the number of elements of the semiconductor element 16 is only different, the same effect can be obtained corresponding to each claim shown in the first to fourth embodiments.

  In the first to fourth embodiments described above, the semiconductor module 10 as a double-sided module is applied (see FIGS. 1 to 4). It can replace with this form and can also apply to the semiconductor module 10 as a single-sided module. For example, FIG. 7 shows a configuration example of a single-sided module corresponding to the semiconductor module 10 shown in the first embodiment. 7A is a plan view, and FIG. 7B is a cross-sectional view taken along the arrow VIIB-VIIB shown in FIG. 7A. The same elements as those used in Embodiment 1 are denoted by the same reference numerals, and description thereof is omitted.

  The semiconductor module 10 as a single-sided module is different from the semiconductor module 10 as a double-sided module shown in Embodiment 1 in the number of heat radiation portions 15. In the first embodiment, four semiconductor devices 16 are provided corresponding to both sides of each semiconductor element 16, whereas in the configuration example of FIG. 7, two semiconductor devices 16 are provided corresponding to one side. The configuration of the insulating member 14 and the conductor member 13 is the same as that of the first embodiment (see FIG. 1). Although not shown, the semiconductor module 10 shown in the second to fourth embodiments can also have the same configuration as that in FIG. In any form, since the number of the heat radiating portions 15 is only different from the first to fourth embodiments, the same effects can be obtained corresponding to the claims shown in the first to fourth embodiments. .

  In the above-described first to fourth embodiments, the insulating member 14 is used to cover the entire surface of the semiconductor module 10 (see FIG. 4) or to wrap around a plurality of surfaces (FIGS. 1 and 1). 2, see FIGS. 3 and 5). In other words, the covering area of the insulating member 14 is configured to be larger than the covering area of the conductor member 13. Here, “covered area” means an area covering the semiconductor module 10. Instead of this form, the covering area of the conductor member 13 is formed wider than the covering area of the insulating member 14 and covers the entire surface of the semiconductor module 10 (see FIG. 4) or covers around a plurality of surfaces. It is good also as a structure.

  For example, in FIGS. 8A and 8B, one surface (upper surface or lower surface in FIG. 8B) is opposite to Embodiment 1 (FIG. 1), which is configured to wrap around a plurality of surfaces. The structure which forms the insulating member 14 in an area wider than the total area of the two heat radiating parts 15 and covers the semiconductor module 10 by circling a plurality of surfaces of the semiconductor module 10 (four unconnected surfaces in FIG. 8) is shown. . 8A is a plan view, and FIG. 8B is a cross-sectional view taken along arrow VIIIB-VIIIB shown in FIG. 8A. The corner may have a staircase shape as shown by a solid line in FIG. 8B, or may be rounded as shown by a two-dot chain line. Although not shown, the semiconductor module 10 shown in the second to fourth embodiments can have the same configuration as that in FIG. In addition, the structure which forms and covers the insulating member 14 and the conductor member 13 in the same shape (equivalent covering area) is as shown in the third embodiment (FIG. 3), and the same applies to the first, second and fourth embodiments. It is also possible to apply to. In any form, since the covering areas for the insulating member 14 and the conductor member 13 are different from each other, the same function and effect can be obtained corresponding to each claim shown in the first to fourth embodiments. .

  In the first to fourth embodiments described above, the heat generated in the semiconductor element 16 is transmitted to the conductor member 13 via the insulating member 14 and discharged to the outside from the conductor member 13 (see FIGS. 1 to 4). ). It may replace with this form and it is good also as a structure provided with the heat absorption member 20 which absorbs the heat transmitted to the conductor member 13 positively. The structural example of the heat absorption member 20 is shown in FIG. 9 and FIG. Below, each structural example shown in FIG. 9 and FIG. 10 is demonstrated.

  The heat absorbing member 20 shown in the perspective view of FIG. 9 is a cooling device 21 including a plurality of cooling bodies 21a and a plurality of pipe lines 21b. The semiconductor modules 10 are arranged between the cooling bodies 21a as indicated by arrows Din, and the surface of the cooling body 21a and the surface of the conductor member 13 are brought into contact with each other. Heat exchange is performed according to the size of the contact area. In the configuration example of FIG. 9, since there are five cooling bodies 21a, the semiconductor module group 10G (specifically, the semiconductor element 16) including the four semiconductor modules 10 can be cooled. Of the two pipe lines 21b, one is an inflow path through which fluid (for example, water, air, oil, etc.) flows, and the other is an outflow path through which the fluid flows out. By using the cooling device 21, the insulating member 14 and the conductor member 13 can be actively cooled.

  The heat absorbing member 20 shown in the cross-sectional view of FIG. 10 is a cooling fin 22 formed of metal or the like. As shown in the figure, the cooling fins 22 are bonded to or bonded to the plurality of conductor members 13. Even when the cooling fins 22 are used, the insulating member 14 and the conductor member 13 can be actively cooled.

  In Embodiment 1-4 mentioned above, the terminals 12 and 17 were applied as a connection member (refer FIGS. 1-4). Instead of this form, another connecting member may be applied to one or both of the terminals 12 and 17. Other connection members correspond to, for example, leads, pins, bus bars, and the like. Since only the connection member used for the connection of the external device is different, it is possible to obtain the same effects as those of the first to fourth embodiments.

10 Semiconductor module 11 Resin sealing part 12, 17 Terminal (connection member)
DESCRIPTION OF SYMBOLS 13 Conductive member 14 Insulating member 14a 1st insulating member 14b 2nd insulating member 15 Heat radiation part 16 Semiconductor element 18 Overlapping part 20 Heat absorption member 21 Cooling device 22 Cooling fin

Claims (7)

In a semiconductor module comprising a plurality of semiconductor elements, a heat dissipation part that releases heat generated in each of the semiconductor elements, and an insulating member that covers at least the semiconductor elements,
The insulating member covers the entire surface of the semiconductor module or covers a plurality of surfaces around the semiconductor module.   The said insulating member covers all the surfaces except the surface which has a connection member which makes an electrical connection with the said external device, when it wraps around and covers the several surface of the said semiconductor module. The semiconductor module as described.   3. The semiconductor module according to claim 1, wherein the insulating member has an overlapping portion that overlaps at least a part on a surface of the semiconductor module that does not include the heat dissipation portion, and integrates the overlapping portion. .   The semiconductor module according to claim 3, wherein the integration of the overlapping portions is performed by one or both of adhesion and welding.   5. The semiconductor module according to claim 1, wherein the insulating member has a conductor member on a surface opposite to a surface facing the semiconductor element. 6.   The semiconductor module according to claim 5, wherein the conductor member is integrally formed with the insulating member in advance.   The semiconductor module according to claim 1, wherein the insulating member is an insulating film or an insulating sheet.

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