Electronic modules having electrical connection elements in the form of wedge-wedge-bonded structures not consisting of solid metal material

Abstract

An electronic module comprising one or more arrangements each composed of a first electronic component having a first contact surface with, wedge-bonded on this first contact surface, a first terminus of an originally free structure not consisting of solid metal material and a second electronic component having a second contact surface with, wedge-bonded on this second contact surface, a second terminus of the originally free structure not consisting of solid metal material, wherein the originally free structure not consisting of solid metal material is a structure (i) in ribbon form composed of knitted, woven or braided fine metal wire and having a cross-sectional area in the range of 25,000 to 800,000 µm2 or (ii) in cable form composed of stranded fine metal wire and having a cross-sectional area in the range of 8000 to 600,000 µm2 or (iii) in tube form composed of circular-knitted fine metal wire and having a cross-sectional area in the range of 8000 to 600,000 µm2.

Description

[0001] 2022PF00012

[0002] 1

[0003] Electronic modules with wedge-wedge bonded structures not made of solid metal as electrical connecting elements

[0004] The invention relates to electronic modules with wedge-wedge bonded structures not made of solid metal material as electrical connecting elements.

[0005] The electronic modules mentioned herein are preferably those in the field of power electronics, i.e. they are preferably so-called power modules.

[0006] Heavy-duty bonding wires and bonding ribbons made of solid metal are known to those skilled in the art as electrical connecting elements in the field of electronics. They are used, in particular, as electrical connecting elements in the assembly and connection technology of electronic modules, especially power modules. The high currents in the field of power electronics require large cross-sections of heavy-duty bonding wires and bonding ribbons compared to cross-sections found in thin-duty bonding wires in the field of microelectronics. However, the larger the cross-section, the greater the rigidity, which is associated with reduced flexibility of the respective bond connection.

[0007] US 2019 / 006126 A1 discloses a first ultracapacitor having a first terminal, a second ultracapacitor having a second terminal, and a connecting strip including a central portion positioned between a first attachment portion and a second attachment portion, wherein the first terminal of the first ultracapacitor is connected to the first attachment portion of the connecting strip and the second terminal of the second ultracapacitor is connected to the second attachment portion of the connecting strip, and further wherein the central portion is formed from a flexible conductive material. The flexible conductive material may be in the form of metal wire mesh.US 2019 / 006126 A1 further discloses that the first fastening portion may define a first opening through which the first terminal is received, and the second fastening portion may define a second opening through which the second terminal is received. Regarding the actual fastening, US 2019 / 006126 A1 teaches the use of fastening devices such as nuts, washers, bolts, screws, compression or expansion fittings, etc. The fastening devices may be further connected to the fastening portions (e.g., welded, glued, ultrasonically bonded, etc.) to ensure that they remain securely connected to the ultracapacitors. Alternatively, the fastening devices could be omitted, and the connecting strip alone could be connected using other techniques, such as welding.

[0008] JP 2003-331655 discloses flexible flat cables consisting of a plurality of interwoven metal threads. The flexible flat cable can be used in an automotive airbag system.

[0009] The object of the invention was to provide an alternative electrically conductive connection technology to the aforementioned prior art in the field of assembly and connection technology of electronic modules.

[0010] The problem can be solved by means of wedge-wedge bonded structures not made of solid metal material as electrical connecting elements in electronic modules. In other words, the problem can be solved by means of one or more arrangements within electronic modules, which are explained in more detail below, wherein the arrangements comprise wedge-wedge bonded structures not made of solid metal material. The wedge-wedge bonded structures not made of solid metal material serve as electrical connecting elements. In this respect, the solution to the problem also encompasses electronic modules which comprise one or more electrical connecting elements in the form of wedge-wedge bonded structures not made of solid metal material. Furthermore, a method for producing such electronic modules is also encompassed by the solution to the problem.

[0011] Said structures not made of solid metal each have two terminals; as mentioned, the latter are each wedge-bonded, so that they can be referred to as wedge-wedge bonded structures not made of solid metal. In the following, a distinction is made between free or originally free structures not made of solid metal [structures not made of solid metal that are not yet attached anywhere at or by their two terminals; hereinafter also referred to as "free structures" or "originally free structures"] and wedge-wedge bonded structures not made of solid metal [structures not made of solid metal that are wedge-wedge bonded (attached by wedge-wedge bonding) at or by their two terminals; hereinafter also referred to as "wedge-wedge bonded structures"].In other words, the wedge-wedge bonded structures can be formed from the originally free structures by wedge bonding their two termini; as a result, the wedge-wedge bonded structures have a central section between their two wedge-bonded termini. Both the originally free and the wedge-wedge bonded structures are characterized by lower rigidity compared to conventional bonding thick wires or bonding ribbons made of solid metal material; increased flexibility of a wedge-wedge bond is enabled, thus enabling, for example, wedge-wedge oblique bonding. The wedge-wedge bonded structures can allow more complex loop formation, i.e., achieve loop shapes that were previously technically unfeasible; for example, flatter angles for a lower-inductance structure as well as a three-dimensional, complex shape are possible.Furthermore, a reduction in the mechanical stress on the respective wedge bonding point and thus an increase in the service life of a wedge-wedge bond connection can be achieved.

[0012] As stated, the electronic modules according to the invention comprise one or more electrical connecting elements in the form of wedge-wedge bonded structures not made of solid metal. More precisely, an electronic module according to the invention comprises one or more arrangements, each comprising a total of two contact surfaces of two electronic components and a structure not made of solid metal that connects the two contact surfaces of the two electronic components via its two wedge-bonded termini. In other words, an electronic module according to the invention comprises one or more arrangements, each comprising a first contact surface of a first electronic component with a wedge-bonded first termini of an originally free structure not made of solid metal, and a second contact surface of a second electronic component with a wedge-bonded second termini of the originally free structure.In other words, an electronic module according to the invention comprises one or more arrangements, each comprising a first electronic component with a first contact surface having a first terminus of an originally free structure not made of solid metal material, wedge-bonded to this first contact surface, and a second electronic component with a second contact surface having a second terminus of the originally free structure not made of solid metal material, wedge-bonded to this second contact surface. The originally free structure not made of solid metal material is a structure (i) in ribbon form made of knitted, crocheted, woven or braided fine metal wire and having a cross-sectional area in the range from 25,000 to 800,000 pm. 2 or (ii) in rope form made of stranded metal fine wire and having a cross-sectional area in the range of 8000 to 600000 pm 2or (iii) in tubular form made of round-knitted or circular-woven fine metal wire and having a cross-sectional area in the range of 8000 to 600000 pm 2 . It should be emphasized once again that the electronic modules according to the invention are preferably power modules; accordingly, in the case of power modules, the electronic components are in particular electronic components for power electronics.

[0013] Examples of the aforementioned electronic components, each having at least one contact surface, include substrates and active electronic components. For example, the aforementioned first electronic component can be a substrate and the aforementioned second electronic component can be an active electronic component. Examples of substrates include IMS substrates (insulated metal substrates), metal-ceramic substrates such as AMB substrates (active metal brazed substrates) and DCB substrates (direct copper bonded substrates), PCBs (printed circuit boards), and leadframes. Examples of active electronic components include diodes, IGBTs (insulated-gate bipolar transistors), and MOSFETs (metal-oxide-semiconductor field-effect transistors).

[0014] The originally free structures not made of solid metal material are, as mentioned above, structures (i) in ribbon form made of knitted, woven or braided fine metal wire and with a cross-sectional area in the range of 25,000 to 800,000 pm 2 or (ii) in rope form made of stranded metal fine wire and having a cross-sectional area in the range of 8000 to 600000 pm 2 or (iii) in tubular form made of round-knitted or circular-woven fine metal wire and having a cross-sectional area in the range of 8000 to 600000 pm 2 .

[0015] To avoid misunderstandings, the cross-sectional area of ​​the originally free structures mentioned here does not represent a cross-section through a solid metal material and accordingly does not represent a completely metallic cross-section, but includes not only cross-cut metal fine wire but also hollow space components.

[0016] The originally free structures in ribbon form are not to be confused with bond ribbons made of solid metal material; they will also be referred to as “ribbons” for short in the following.

[0017] The originally free-form structures in rope form are not to be confused with bonding thick wires made of solid metal; they will be referred to as "ropes" for short. The originally free-form structures in tube form, which are not likely to be confused with bonding ribbons made of solid metal, will be referred to as "tube networks" for short.

[0018] The originally free structures do not consist of solid metal material like the known bonding thick wires or bonding ribbons, but depending on the embodiment (i), (ii) or (iii) of warp-knitted, knitted, woven, braided, stranded, round-knitted or circular-knitted fine metal wire. One or more types of fine metal wire can be connected to one another to form a warp-knitted fabric, a woven fabric, a braid, a rope, a round-knitted fabric or a round-knitted fabric, with the warp-knitted fabric, woven fabric and braid being realized as a flat ribbon-shaped network and the round-knitted fabric and round-knitted fabric as a tube network. Not only are all embodiments of the tube networks permeable to gases, but also all embodiments of the ropes and ribbons do not represent solid metal material and are therefore also permeable to gases, i.e. they are permeable to gases with practically no resistance and without requiring diffusion processes.They also have in common that their individual fine metal wires touch each other; they enable an electrical current flow in the longitudinal direction (perpendicular to the cross-sectional area of ​​an originally free structure).

[0019] The term "a type of metal fine wire" can refer to both the material, more specifically the metal, and the wire cross-section; in the case of round metal fine wire, to the material and the wire diameter. Examples of material types include, in particular, copper and copper-based alloys [copper alloys with a copper content of >98 wt.% (weight %), preferably >99 wt.%], silver and silver-based alloys (silver alloys with a silver content of >95 wt.%, preferably >99 wt.%), aluminum and aluminum-based alloys (aluminum alloys with an aluminum content of >98 wt.%, preferably >99 wt.%), gold-plated silver (a silver or silver alloy core with a gold sheath), aluminum-plated copper (a copper or copper alloy core with an aluminum sheath), and palladium-plated copper (a copper or copper alloy core with a palladium sheath).The metal fine wire(s) constituting an originally free structure can therefore be selected from the group consisting of metal fine wires made of copper, copper-based alloys, silver, silver-based alloys, aluminum, aluminum-based alloys, gold-plated silver, aluminum-plated copper, and palladium-plated copper. The wire cross-section of a metal fine wire can, for example, be in the range from 1950 to 71000 pm. 2 The wire diameter of a metal fine wire with a round cross-section can, for example, be in the range of 50 to 300 pm. If an originally free structure comprises several types of metal fine wires, this means that it comprises at least two different metal fine wires that differ from one another in their material type and / or in the shape of their cross-section and / or in their cross-sectional area.

[0020] Each of the designs, knitted fabric, woven fabric, braided fabric, rope, circular knitted fabric and circular knitted fabric, can be made from individually processed or initially twisted fine metal wires.

[0021] The one or more types of metal fine wire combined to form a knitted fabric, a woven fabric, a braid, a rope, a circular knitted fabric, or a circular knitted fabric may exhibit an overall homogeneous arrangement or distribution within the rope or network. However, they may also exhibit an inhomogeneous yet symmetrical distribution within the network; for example, a rope or network originally consisting of free aluminum and copper fine wire may be designed such that the aluminum fine wire portion essentially constitutes the outer surface area, while the copper fine wire portion is essentially located internally as the core of the rope or network.

[0022] The structures (originally free structures, wedge-wedge bonded structures) do not comprise any electrical insulating material, ie neither as a structure nor with regard to the fine metal wire encompassed by the structure.

[0023] Structures of type (i), ie ribbons, can have a cross-sectional area described by a substantially rectangular outline, for example with an area in the range of 25000 to 800000 pm 2 The envelope of the cross-sectional area can describe the smallest possible rectangle. The width / thickness ratio of the smallest possible rectangle can, for example, range from 20:1 to >1:1.

[0024] A distinction is made here between an envelope of the outline of the cross-sectional area of ​​an originally free structure and the outline of the cross-sectional area of ​​an originally free structure. To avoid misunderstandings, while the said outline (outline in descriptive geometry) can be formed by a wavy or jagged line, for example, the envelope, on the other hand, means a straight line which touches the said outline in the sense of the smallest possible rectangle. Thus, the smallest possible rectangular area described by the envelope is slightly larger than the cross-sectional area defined by the outline. The cross-sectional area of ​​a ribbon is formed by the cross-sectioned knitted, crocheted, woven or braided fine metal wires, i.e. the cross-sectional area is essentially filled with metal, but also includes the aforementioned hollow portions.

[0025] According to a first process variant, the ribbons can be produced directly by knitting, knitting, weaving or braiding fine metal wire as flat networks with the desired dimensions and, if necessary, subsequently rolled flat.

[0026] According to a second process variant, the ribbons can also be produced by knitting, knitting, weaving, or braiding fine metal wire into flat structures, followed by cutting to the desired size. Cutting can be done mechanically or by laser cutting. Cut edges can be welded if necessary. During laser cutting, laser welding of cut edges can be performed in the same step. Finally, flat rolling can be used if necessary.

[0027] According to a third process variant, the ribbons can also be produced by circular knitting or circular knitting of fine metal wire, as special techniques of knitting or circular knitting of fine metal wire, followed by a subsequent flat rolling of the resulting circular knitted or circular knitted fabrics; in this case, the tubular networks are necessarily flat-rolled.

[0028] The optional or necessary flat rolling to form the strips is expediently carried out in such a way that compression occurs, but preferably substantially without deformation of the cross-sectional shape of the fine metal wire(s) making up the strips. During flat rolling, two outward-facing semicircular bulges can form on the opposite broad sides defining the thickness of the strip, i.e. a substantially rectangular cross-sectional area then has said semicircular bulges; the latter can have a radius that does not exceed the thickness of the strip. The formation of such semicircular bulges can be deliberately sought or deliberately prevented, in the latter case, for example, by lateral feeding during flat rolling, for example by using lateral rollers with a set roll gap.

[0029] Structures of type (ii), ie ropes, may have a cross-sectional area described by a substantially round outline, for example with an area in the range of 8000 to 600000 pm 2 . In this case, an envelope of the outline of the cross-sectional area can describe the smallest possible rectangle and, in particular, the smallest possible square. Ropes that have undergone flat rolling can have a cross-sectional area described by an outline essentially in the shape of a rectangle with two outward-facing semicircular bulges, for example, with an area in the range of 8000 to 600000 pm 2 . An envelope of the outline of the cross-sectional area can describe the smallest possible rectangle.

[0030] As already mentioned, to avoid misunderstandings, while the said outline can be formed by a wavy or jagged line, for example, the envelope, on the other hand, means a straight line which encloses the said outline in the sense of the smallest possible square or the smallest possible rectangle.

[0031] The cross-sectional area of ​​a rope is formed by the cross-cut stranded metal fine wires, i.e. the cross-sectional area is essentially filled with metal, but also includes the aforementioned hollow spaces.

[0032] The ropes can be manufactured directly by stranding fine metal wire and then flat-rolled if necessary.

[0033] The optional flat rolling is advantageously carried out in such a way that compression occurs, but preferably essentially without deformation of the cross-sectional shape of the metal fine wire(s) making up the ropes.

[0034] Structures of type (iii), ie tube networks, can have a cross-sectional area described by a substantially round outline, for example with an area in the range of 8000 to 600000 pm 2 . In this case, an envelope of the outline of the cross-sectional area can describe the smallest possible rectangle and, in particular, the smallest possible square. Hose networks that have undergone rolling deformation while avoiding flat rolling can have a cross-sectional area described by an outline essentially in the shape of a rectangle with two outwardly facing semicircular bulges, for example, with an area in the range of 8000 to 600000 pm 2 . An envelope of the outline of the cross-sectional area can describe the smallest possible rectangle.

[0035] As already mentioned, to avoid misunderstandings, while the outline can be formed by a wavy or jagged line, for example, the envelope, on the other hand, represents a straight line that encloses the outline in the sense of the smallest possible square or rectangle. A tubular network is naturally hollow. Its cross-sectional area is formed by the cross-cut, circularly knitted or circularly woven fine metal wires located only in the edge region, while it has a comparatively high void ratio, especially in the center or interior.

[0036] The tube networks can be produced directly by circular knitting or circular knitting of fine metal wire and, if necessary, subsequently gently rolled to obtain a hollow tube shape, but in any case avoiding complete flat rolling.

[0037] The optional gentle roll forming is advantageously carried out in such a way that compression occurs while maintaining a hollow tube shape and essentially without deformation of the cross-sectional shape of the metal fine wire(s) making up the tube networks.

[0038] The originally free structures have two unattached terminals. After production, the originally free structures can have a length, for example, in the range of 50 to 50,000 meters, preferably 100 to 500 meters. They can be stored rolled up, for example, and cut by the user during wedge-wedge bonding into pieces with a length of, for example, 0.5 to 5 centimeters. Each such piece intended for wedge-wedge bonding itself represents an originally free structure.

[0039] The wedge-wedge bonded structures each have two wedge-bonded (secured by wedge bonding) terminals. Each wedge bonding site is a direct wedge bonding site, i.e., a wedge bonding site created without the use of any additional aids such as fastening devices. The length between the two wedge-bonded terminals, i.e., the length of its central section, is typically in the range of 0.4 to 4.5 centimeters.

[0040] The wedge-wedge bonded structures each connect two corresponding contact surfaces (e.g., bond pads) of two electronic components of an electronic module according to the invention, just as conventional wedge-wedge bonded thick bonding wires or bonding ribbons made of solid metal material do. In other words, the merit of the invention is that the wedge-wedge bonded structures not only provide an advantageous replacement for conventional wedge-wedge bonded thick bonding wires or bonding ribbons made of solid metal material. Rather, it is surprisingly possible to successfully use such an originally free structure, which is still unattached at or with its two termini, to produce an aforementioned arrangement or an electronic module comprising one or more such arrangements, i.e., to connect it to two corresponding contact surfaces of two electronic components by means of wedge-wedge bonding.Needless to say for the person skilled in the art, wedge-wedge bonding excludes the use of fastening devices such as those in US 2019 / 006126 A1, which was mentioned at the beginning.

[0041] Wedge-wedge bonding itself is practically no different from wedge-wedge bonding known to those skilled in the art and used in the case of bonding thick wires and bonding ribbons made of solid metal material, for example wedge-wedge bonding with ultrasound assistance and / or with laser assistance.

[0042] The invention thus also relates to the use of a free structure, not yet secured at both its termini and not made of solid metal material, for producing one of the said arrangements by wedge bonding one of the two termini to a contact surface of a first electronic component (first contact surface of a first electronic component) and wedge bonding the other of the two termini to a contact surface of a second electronic component (second contact surface of a second electronic component), wherein the free structure, not yet secured at both its termini and not made of solid metal material, is a structure (i) in ribbon form made of knitted, woven or braided fine metal wire and having a cross-sectional area in the range of 25,000 to 800,000 pm 2 or (ii) in rope form made of stranded metal fine wire and having a cross-sectional area in the range of 8000 to 600000 pm 2or (iii) in tubular form made of round-knitted or circular-woven fine metal wire and having a cross-sectional area in the range of 8000 to 600000 pm 2 In this case, everything mentioned above regarding the structure embodiments (i), (ii) and (iii) applies.

[0043] The method for producing said one or more arrangements of an electronic module according to the invention comprises the following steps per arrangement:

[0044] (1) Providing two electronic components, each with one of a total of two contact surfaces to be connected to one another (providing a first electronic component with a first contact surface and a second electronic component with a second contact surface to be connected to the first contact surface of the first electronic component),

[0045] (2) Providing a free structure which is not yet attached to its two termini and is not made of solid metal, (3) Wedge bonding one of the two termini to one of the two contact surfaces to be connected, and

[0046] (4) Wedge bonding of the other terminus to the other of the two contact surfaces to be connected, wherein the free structure, not yet secured at its two termini and not made of solid metal, is a structure (i) in ribbon form made of knitted, woven or braided fine metal wire and having a cross-sectional area in the range of 25,000 to 800,000 pm 2 or (ii) in rope form made of stranded metal fine wire and having a cross-sectional area in the range of 8000 to 600000 pm 2 or (iii) in tubular form made of round-knitted or circular-woven fine metal wire and having a cross-sectional area in the range of 8000 to 600000 pm 2In this case, everything mentioned above regarding the structure embodiments (i), (ii) and (iii) applies.

[0047] The method for producing an electronic module according to the invention in turn comprises the production of one or more arrangements of the electronic module, each arrangement comprising the following steps:

[0048] (1) Providing two electronic components of the arrangement, each with one of a total of two contact surfaces to be connected to one another (providing a first electronic component of the arrangement with a first contact surface and a second electronic component of the arrangement with a second contact surface to be connected to the first contact surface of the first electronic component),

[0049] (2) Provision of a free structure, not yet secured at both its termini, made of solid metal,

[0050] (3) Wedge bonding of one of the two termini to one of the two contact surfaces to be connected, and

[0051] (4) Wedge bonding of the other terminus to the other of the two contact surfaces to be connected, wherein the free structure, not yet secured at its two termini and not made of solid metal, is a structure (i) in ribbon form made of knitted, woven or braided fine metal wire and having a cross-sectional area in the range of 25,000 to 800,000 pm 2 or (ii) in rope form made of stranded metal fine wire and having a cross-sectional area in the range of 8000 to 600000 pm 2 or (iii) in tubular form made of round-knitted or circular-woven fine metal wire and having a cross-sectional area in the range of 8000 to 600000 pm 2 In this case, everything mentioned above regarding the structure embodiments (i), (ii) and (iii) applies.

Claims

Patent claims 1. Electronic module comprising one or more arrangements, each consisting of a first electronic component with a first contact surface having a wedge-bonded first term of an originally free structure not made of solid metal on this first contact surface, and a second electronic component with a second contact surface having a wedge-bonded second term of the originally free structure not made of solid metal on this second contact surface, wherein the originally free structure not made of solid metal is a ribbon-shaped structure (i) of knitted, crocheted, woven, or braided fine metal wire and with a cross-sectional area in the range of 25,000 to 800,000 pm 2 or (ii) in rope form made of stranded fine metal wire and with a cross-sectional area in the range of 8000 to 600000 pm 2or (iii) in tube form made of circular-woven or circular-knitted fine metal wire and having a cross-sectional area in the range of 8000 to 600000 pm 2 it.

2. Electronic module according to claim 1, wherein the electronic module is a power module.

3. Electronic module according to claim 1 or 2, wherein the first electronic component is a substrate and wherein the second electronic component is an active electronic component.

4. Electronic module according to one of the preceding claims, wherein one or more types of fine metal wire are connected together to form the knitted, crocheted, woven, braided, rope, circular knitted or circular crocheted.

5. Electronic module according to one of the preceding claims, wherein the metal fine wire(s) constituting the structure are selected from the group consisting of metal fine wires made of copper, copper-based alloys, silver, silver-based alloys, aluminum, aluminum-based alloys, gold-plated silver, aluminum-plated copper and palladium-plated copper.

6. Electronic module according to one of the preceding claims, wherein the metal fine wire(s) constituting the structure each have a wire cross-section in the range of 1950 to 71000 pm. 2 exhibit.

7. Use of a free structure, not yet fixed at its two terms and not made of solid metal, to produce an arrangement consisting of a first electronic component with a first contact surface with wedge-shaped components on this first contact surface. bonded first term of the originally free structure, which is not yet fixed at its two terms and is not made of solid metal, and a second electronic component with a second contact surface with a wedge-bonded second term of the originally free structure, which is not yet fixed at its two terms and is not made of solid metal, by wedge-bonding the first term to the first contact surface of the first electronic component and wedge-bonding the second term to the second contact surface of the second electronic component, wherein the free structure, which is not yet fixed at its two terms and is not made of solid metal, is a structure (i) in the form of a ribbon made of knitted, crocheted, woven or braided fine metal wire and with a cross-sectional area in the range of 25000 to 800000 pm 2or (ii) in rope form made of stranded fine metal wire and with a cross-sectional area in the range of 8000 to 600000 pm 2 or (iii) in tube form made of circular-woven or circular-knitted fine metal wire and having a cross-sectional area in the range of 8000 to 600000 pm 2 it.

8. A method for manufacturing an electronic module according to claim 1 comprising the manufacture of one or more arrangements of the electronic module, wherein the following steps are comprised for each arrangement: (1) Providing a first electronic component of the arrangement having a first contact surface and a second electronic component of the arrangement having a second contact surface to be connected to the first contact surface of the first electronic component, (2) Providing a free structure not yet fixed at its two ends and not made of solid metal, (3) Wedge bonding of one of the two terms at one of the two contact surfaces to be joined, and (4) Wedge bond of the other term at the other of the two contact surfaces to be joined, wherein the free structure, not yet fixed at its two terms and not made of solid metal, is a structure (i) in ribbon form of knitted, crocheted, woven or braided fine metal wire and with a cross-sectional area in the range of 25000 to 800000 pm 2 or (ii) in rope form made of stranded fine metal wire and with a cross-sectional area in the range of 8000 to 600000 pm 2 or (iii) in tube form made of circular-woven or circular-knitted fine metal wire and having a cross-sectional area in the range of 8000 to 600000 pm 2 it.

9. The method of claim 8, wherein the electronic module is a power module.

10. A method according to claim 8 or 9, wherein the first electronic component is a substrate and the second electronic component is an active electronic component.

11. A method according to any one of claims 8 to 10, wherein one or more types of Fine metal wire connected together to form the knitted fabric, woven fabric, braid, rope, circular knitted fabric or circular knitting.

12. Method according to any one of claims 8 to 11, wherein the metal wire(s) constituting the structure are selected from the group consisting of metal wires made of copper, copper-based alloys, silver, silver-based alloys, aluminum, aluminum-based alloys, gold-plated silver, aluminum-plated copper and palladium-plated copper.

13. Method according to any one of claims 8 to 12, wherein the metal fine wire(s) constituting the structure each have a wire cross-section in the range of 1950 to 71000 pm.2 exhibit.