WO2022259824A1 - 接合構造および半導体装置 - Google Patents
接合構造および半導体装置 Download PDFInfo
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- WO2022259824A1 WO2022259824A1 PCT/JP2022/020467 JP2022020467W WO2022259824A1 WO 2022259824 A1 WO2022259824 A1 WO 2022259824A1 JP 2022020467 W JP2022020467 W JP 2022020467W WO 2022259824 A1 WO2022259824 A1 WO 2022259824A1
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- H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L24/34—Strap connectors, e.g. copper straps for grounding power devices; Manufacturing methods related thereto
- H01L24/39—Structure, shape, material or disposition of the strap connectors after the connecting process
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- H01L23/488—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of soldered or bonded constructions
- H01L23/495—Lead-frames or other flat leads
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- H01L23/31—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape
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- H01L24/34—Strap connectors, e.g. copper straps for grounding power devices; Manufacturing methods related thereto
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- H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
- H01L25/07—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L29/00
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- H01L2224/39—Structure, shape, material or disposition of the strap connectors after the connecting process
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Definitions
- the present disclosure relates to junction structures and semiconductor devices.
- Patent Document 1 discloses a conventional semiconductor device (power semiconductor module).
- the power semiconductor module described in Patent Document 1 includes a ceramic circuit board, a power semiconductor element, a metal cylinder, external terminals, and a transfer mold resin (see FIG. 6 of Patent Document 1).
- the ceramic circuit board includes a ceramic plate and a copper foil conductive portion (wiring pattern) provided on the ceramic plate.
- the power semiconductor element and the metal cylinder are arranged on the wiring pattern of the ceramic circuit board.
- the metal cylinder is joined to the wiring pattern by soldering, for example.
- the external terminal is, for example, press-fitted to the metal tube. The external terminals protrude from the upper surface of the transfer mold resin.
- an external terminal is inserted into a metal cylinder.
- the external terminals are inserted into the metal cylinder, if the amount of insertion of the external terminals into the metal cylinder is small, the external terminals may come off from the metal cylinder.
- the present disclosure has been conceived in view of the above circumstances, and aims to provide a joining structure between a metal tube and a conductive portion that can ensure an appropriate amount of insertion of an external terminal into the metal tube. Let it be the first issue.
- Another object of the present disclosure is to provide a semiconductor device having such a junction structure.
- a joint structure provided by the first aspect of the present disclosure includes a conductive substrate having a conductive portion, a cylindrical holder having conductivity, a terminal including a metal pin inserted into the holder, and the conductive portion. and a conductive joining material that joins the holder, wherein the metal pin includes a straight portion extending along the thickness direction of the conductive portion, and the holder extends in the thickness direction and a first through hole into which the straight portion of the metal pin is inserted, and the conductive portion includes a terminal bonding surface to which the holder is bonded and an opening formed in the terminal bonding surface. , and when viewed in the thickness direction, the outer peripheral edge of the opening is at least partially inside the outer peripheral edge of the holder.
- a semiconductor device provided by the second aspect of the present disclosure includes the junction structure provided by the first aspect, and a semiconductor element electrically connected to the terminal.
- the joint structure of the present disclosure it is possible to ensure an appropriate amount of insertion of the metal pin into the holder. Moreover, since the semiconductor device of the present disclosure has a joining structure in which an appropriate amount of insertion of the metal pin into the holder is ensured, it is possible to prevent the metal pin from falling out of the holder.
- FIG. 1 is a perspective view of a semiconductor device according to an embodiment
- FIG. 2 is a perspective view of FIG. 1 with a plurality of wires, a resin member, a resin portion, and a resin-filled portion omitted.
- FIG. 3 is a perspective view of FIG. 2 with the conducting members (the first conducting member and the second conducting member) omitted.
- FIG. 4 is a plan view showing the semiconductor device according to the embodiment; 5 is a diagram showing the resin member, the resin portion, and the resin-filled portion in the plan view of FIG. 4 with imaginary lines.
- FIG. 6 is a partial enlarged view enlarging a part of FIG. 5, omitting the resin member, the resin portion, and the resin filling portion.
- FIG. 1 is a perspective view of a semiconductor device according to an embodiment
- FIG. 2 is a perspective view of FIG. 1 with a plurality of wires, a resin member, a resin portion, and a resin-filled portion omitted.
- FIG. 7 is a diagram showing a part of the conducting member 5 (second conducting member) in the plan view of FIG. 5 with an imaginary line.
- FIG. 8 is a partial enlarged view enlarging a part of FIG. 7, and is an enlarged plan view of a main part showing the joining structure of the present disclosure.
- FIG. 9 is a front view of the semiconductor device according to the embodiment;
- FIG. 10 is a bottom view of the semiconductor device according to the embodiment;
- FIG. 11 is a left side view of the semiconductor device according to the embodiment;
- FIG. 12 is a right side view of the semiconductor device according to the embodiment;
- FIG. 10 is a front view of the semiconductor device according to the embodiment
- FIG. 10 is a bottom view of the semiconductor device according to the embodiment
- FIG. 11 is a left side view of the semiconductor
- FIG. 15 is a partially enlarged view enlarging a part of FIG. 14.
- FIG. FIG. 16 is a cross-sectional view taken along line XVI--XVI of FIG.
- FIG. 17 is a cross-sectional view along line XVII-XVII of FIG.
- FIG. 18 is a cross-sectional view along line XVIII-XVIII in FIG. 19 is a cross-sectional view along line XIX-XIX in FIG. 5.
- FIG. FIG. 20 is a cross-sectional view along line XX-XX in FIG.
- FIG. 21 is a partial enlarged view enlarging a part of FIG. 20 and is an enlarged cross-sectional view of a main part showing the joint structure of the present disclosure.
- FIG. 22 is a diagram illustrating a circuit configuration example of the semiconductor device according to the embodiment.
- FIG. 23 is an enlarged cross-sectional view of a main part showing another configuration example of the joint structure of the present disclosure.
- FIG. 24 is an enlarged cross-sectional view of a main part showing another configuration example of the joint structure of the present disclosure.
- FIG. 25 is an enlarged plan view of a main part showing another configuration example of the joint structure of the present disclosure.
- FIG. 26 is an enlarged plan view of a main part showing another configuration example of the joint structure of the present disclosure.
- FIG. 27 is an enlarged plan view of a main part showing another configuration example of the joint structure of the present disclosure.
- FIG. 28 is an enlarged plan view of a main part showing another configuration example of the joint structure of the present disclosure.
- FIG. 23 is an enlarged cross-sectional view of a main part showing another configuration example of the joint structure of the present disclosure.
- FIG. 24 is an enlarged cross-sectional view of a main part
- FIG. 29 is an enlarged plan view of a main part showing another configuration example of the joint structure of the present disclosure.
- FIG. 30 is an enlarged plan view of a main part showing another configuration example of the joint structure of the present disclosure.
- FIG. 31 is a perspective view showing another configuration example of the semiconductor device of the present disclosure, omitting a plurality of wires, a resin member, a resin portion, and a resin filling portion.
- a certain entity A is formed on a certain entity B
- a certain entity A is formed on (of) an entity B
- mean a certain entity A is directly formed in a certain thing B
- a certain thing A is formed in a certain thing B while another thing is interposed between a certain thing A and a certain thing B” including.
- ⁇ an entity A is arranged on an entity B'' and ⁇ an entity A is arranged on (of) an entity B'' mean ⁇ an entity A being placed directly on a certain thing B", and "a thing A being placed on a certain thing B with another thing interposed between something A and something B" include.
- ⁇ an object A is located on (of) an object B'' means ⁇ a certain object A is in contact with an object B, and an object A is located on an object B. Being located on (of)" and "something A is located on (something) B while another thing is interposed between something A and something B including "things”.
- ⁇ a certain object A overlaps an object B when viewed in a certain direction'' means ⁇ a certain object A overlaps all of an object B'', and ⁇ a certain object A overlaps an object B.'' It includes "overlapping a part of a certain thing B".
- the semiconductor device A1 includes a plurality of semiconductor elements 1, a support substrate 2, a first power terminal 31, a second power terminal 32, a plurality of control terminals 33, a conductive substrate 4, a conductive member 5, and a plurality of conductive bonding materials 61, 63. , a plurality of wires 651 to 654 and a resin member 7 .
- the conductive substrate 4 includes a first conductive substrate 4A and a second conductive substrate 4B.
- Conductive member 5 includes a first conductive member 51 and a second conductive member 52 .
- the thickness direction of the semiconductor device A1 will be referred to as "thickness direction z".
- one of the thickness directions z may be referred to as upward and the other as downward.
- terms such as “upper”, “lower”, “upper”, “lower”, “upper surface” and “lower surface” indicate the relative positional relationship of each part in the thickness direction z. It is not necessarily a term that defines the relationship with the direction of gravity.
- “planar view” refers to the time when viewed in the thickness direction z.
- One direction perpendicular to the thickness direction z is called a "first direction x".
- the first direction x is the horizontal direction in the plan view of the semiconductor device A1 (see FIGS. 4 and 5).
- a direction orthogonal to the thickness direction z and the first direction x is called a "second direction y".
- the second direction y is the vertical direction in the plan view of the semiconductor device A1 (see FIGS. 4 and 5).
- Each of the plurality of semiconductor elements 1 is the functional center of the semiconductor device A1.
- a constituent material of each semiconductor element 1 includes, for example, SiC (silicon carbide). The constituent material is not limited to SiC, and may include Si (silicon), GaAs (gallium arsenide), GaN (gallium nitride), or the like.
- Each semiconductor element 1 is, for example, a switching element.
- Each semiconductor element 1 has a switching function part Q1 (see FIG. 22) composed of a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor).
- MOSFET Metal-Oxide-Semiconductor Field-Effect Transistor
- the switching function unit Q1 is not limited to a MOSFET, and may be another transistor such as a field effect transistor including a MISFET (Metal-Insulator-Semiconductor FET) or a bipolar transistor such as an IGBT.
- a plurality of semiconductor elements 1 are elements identical to each other. Each semiconductor element 1 is, for example, an n-channel MOSFET, but may be a p-channel MOSFET.
- the plurality of semiconductor elements 1 include at least one first semiconductor element 1A and at least one second semiconductor element 1B, as shown in FIGS.
- the semiconductor device A1 includes a plurality (three) of first semiconductor elements 1A and a plurality (three) of second semiconductor elements 1B.
- the number of elements 1B is not limited to this configuration, and can be changed as appropriate according to the performance required of the semiconductor device A1.
- the semiconductor device A1 is configured, for example, as a half-bridge circuit, as shown in FIG.
- the plurality of first semiconductor elements 1A constitute an upper arm circuit of the semiconductor device A1
- the plurality of second semiconductor elements 1B constitute a lower arm circuit of the semiconductor device A1.
- the plurality of first semiconductor elements 1A are connected in parallel in the upper arm circuit
- the plurality of second semiconductor elements 1B are connected in parallel in the lower arm circuit.
- Each first semiconductor element 1A and each second semiconductor element 1B are connected in series. In other words, each first semiconductor element 1A is connected in series with each of the three second semiconductor elements 1B.
- the plurality of first semiconductor elements 1A are mounted on the support substrate 2 as shown in FIGS. 3, 7 and 16, respectively. In the examples shown in FIGS. 3, 7 and 16, the plurality of first semiconductor elements 1A are arranged in the second direction y and separated from each other. As shown in FIGS. 14 and 15, each first semiconductor element 1A is electrically connected to the support substrate 2 (first conductor 24A, which will be described later) via a conductive bonding material 61 (a conductive bonding material 61A, which will be described later). are spliced.
- the plurality of second semiconductor elements 1B are mounted on the support substrate 2 as shown in FIGS. 3, 7 and 17, respectively. In the examples shown in FIGS. 3, 7 and 17, the plurality of second semiconductor elements 1B are arranged in the second direction y and separated from each other. As shown in FIG. 14, each second semiconductor element 1B is conductively joined to the support substrate 2 (second conductor 24B described later) via a conductive bonding material 61 (conductive bonding material 61B described later). there is As understood from FIG. 7, when viewed in the first direction x, the plurality of first semiconductor elements 1A and the plurality of second semiconductor elements 1B overlap each other. Alternatively, when viewed in the first direction x, each first semiconductor element 1A may be arranged so as not to overlap any second semiconductor element 1B.
- Each of the plurality of semiconductor elements 1 (the plurality of first semiconductor elements 1A and the plurality of second semiconductor elements 1B) has an element main surface 10a and an element back surface 10b, as shown in FIG.
- FIG. 15 shows a structural example of each first semiconductor element 1A
- each second semiconductor element 1B has a similar structure.
- the element main surface 10a and the element back surface 10b are spaced apart in the thickness direction z.
- the element main surface 10a faces one direction (upward) in the thickness direction z
- the element rear surface 10b faces the other direction (downward) in the thickness direction z.
- each first semiconductor element 1A When each first semiconductor element 1A is joined to the first conductor 24A, the back surface 10b of each first semiconductor element 1A faces the first conductor 24A.
- the back surface 10b of each second semiconductor element 1B faces the second conductor 24B.
- a plurality of semiconductor elements 1 (a plurality of first semiconductor elements 1A and a plurality of second semiconductor elements 1B), as shown in FIGS. It has an electrode 15 .
- the first main-surface electrode 11 , the second main-surface electrode 12 and the back-surface electrode 15 are similarly configured in each semiconductor element 1 .
- the first principal surface electrode 11 and the second principal surface electrode 12 are arranged on the element principal surface 10 a of each semiconductor element 1 .
- the first principal surface electrode 11 and the second principal surface electrode 12 are insulated by an insulating film (not shown).
- the back surface electrode 15 is arranged on the element back surface 10 b of each semiconductor element 1 .
- the first main surface electrode 11 is, for example, a gate, and a drive signal (for example, gate voltage) for driving the semiconductor element 1 is input.
- the second main surface electrode 12 is, for example, a source through which a source current flows.
- Back surface electrode 15 is, for example, a drain through which a drain current flows. The back surface electrode 15 covers the entire area (or substantially the entire area) of the element back surface 10b.
- the back surface electrode 15 is configured by Ag plating, for example.
- each semiconductor element 1 When a drive signal (gate voltage) is input to the first main surface electrode 11 (gate) by the switching function part Q1, each semiconductor element 1 switches between a conductive state and a cut-off state according to the drive signal. .
- the operation of switching between the conductive state and the cutoff state is called a switching operation.
- a current flows from the back surface electrode 15 (drain) to the second main surface electrode 12 (source) in the conductive state, and does not flow in the cutoff state. That is, each semiconductor element 1 performs switching operation by the switching function part Q1.
- the semiconductor device A1 converts a first power supply voltage (for example, a DC voltage) into a second power supply voltage (for example, an AC voltage) using the switching function units Q1 of the plurality of semiconductor elements 1 .
- a first power supply voltage is input to the first power supply terminal 31 and a second power supply voltage is input to the second power supply terminal 32 .
- Some of the plurality of semiconductor elements 1 (two in the semiconductor device A1) further have a diode function section D1 (see FIG. 22) in addition to the switching function section Q1.
- a diode function section D1 see FIG. 22
- one of the plurality of first semiconductor elements 1A (the first semiconductor element 1A arranged on one side of the second direction y in FIG. 7) and the plurality of second semiconductor elements 1B One of them (the second semiconductor element 1B arranged on the other side in the second direction y in FIG. 7) includes a diode function portion D1.
- the function and role of the diode function part D1 are not particularly limited, for example, a diode for temperature detection can be mentioned.
- a diode D2 shown in FIG. 22 is, for example, a parasitic diode component of the switching function section Q1. In a configuration different from that of the semiconductor device A1, none of the plurality of semiconductor elements 1 need have the diode function portion D1.
- each semiconductor element 1 having a diode function portion D1 further includes a pair of third main surface electrodes 13 in addition to a first main surface electrode 11, a second main surface electrode 12, and a rear surface electrode 15. have.
- a pair of third main surface electrodes 13 are similarly configured in each semiconductor element 1 having a diode function portion D1.
- a pair of third main surface electrodes 13 are formed on the element main surface 10a, as can be understood from FIG.
- Each of the pair of third main surface electrodes 13 is electrically connected to the diode function portion D1 in each semiconductor element 1 having the diode function portion D1.
- Each configuration of the plurality of semiconductor elements 1 (the plurality of first semiconductor elements 1A and the plurality of second semiconductor elements 1B) is not limited to the above example.
- an additional electrode (for example, source sense) having the same potential as the second main surface electrode 12 may be formed on the element main surface 10a.
- the support substrate 2 supports a plurality of semiconductor elements 1.
- the support substrate 2 constitutes the path of the main circuit current switched by each semiconductor element 1 together with the conduction member 5 .
- the support substrate 2 includes an insulating layer 21, a main surface metal layer 22, a bonding layer 221, a back surface metal layer 23, a first conductor 24A, a second conductor 24B, and a pair of conductive bonding materials 25A and 25B.
- Insulating layer 21 is, for example, ceramics with excellent thermal conductivity. Examples of such ceramics include AlN (aluminum nitride), SiN (silicon nitride) and Al 2 O 3 (aluminum oxide).
- the insulating layer 21 may be an insulating resin sheet or the like instead of ceramics.
- the insulating layer 21 has, for example, a rectangular shape in plan view.
- the insulating layer 21 has a main surface 21a and a back surface 21b.
- the main surface 21a and the back surface 21b are spaced apart in the thickness direction z.
- the main surface 21a faces upward in the thickness direction z, and the back surface 21b faces downward in the thickness direction z.
- the main surface 21a and the back surface 21b are flat (or substantially flat).
- the main surface metal layer 22 is formed on the main surface 21a, as shown in FIGS.
- a constituent material of the main surface metal layer 22 is, for example, Cu or a Cu alloy.
- the constituent material may be Al or an Al alloy instead of Cu or a Cu alloy.
- the main surface metal layer 22 includes a first support portion 22A and a second support portion 22B.
- the first support portion 22A and the second support portion 22B are spaced apart in the first direction x.
- 24 A of 1st conductors are joined to 22 A of 1st support parts, and 24 A of 1st conductors are supported.
- the second support portion 22B is joined to the second conductor 24B and supports the second conductor 24B.
- Each of the first support portion 22A and the second support portion 22B has, for example, a rectangular shape in plan view.
- the bonding layer 221 is formed on the upper surface of the main surface metal layer 22 (each of the first support portion 22A and the second support portion 22B), as shown in FIG.
- the bonding layer 221 is Ag plating, for example.
- the bonding layer 221 is provided, for example, to improve bonding by solid-phase diffusion with the conductive bonding materials 25A and 25B.
- the back metal layer 23 is formed on the back surface 21b, as shown in FIGS.
- the constituent material of the back surface metal layer 23 is the same as the constituent material of the main surface metal layer 22 .
- the lower surface of the back metal layer 23 (the surface facing the other thickness direction z) is exposed from the resin member 7, for example, as shown in FIGS. Unlike this configuration, the lower surface of the back metal layer 23 may be covered with the resin member 7 .
- a heat dissipating member for example, a heat sink
- the back metal layer 23 overlaps both the first support portion 22A and the second support portion 22B in plan view.
- each constituent material of the main surface metal layer 22 and the back surface metal layer 23 in the support substrate 2 is Cu or a Cu alloy
- the insulating layer 21, the main surface metal layer 22 and the back surface metal layer 23 are made of, for example, DBC (Direct Bonded Copper) substrate.
- DBC Direct Bonded Copper
- the insulating layer 21, the main surface metal layer 22 and the back surface metal layer 23 are made of, for example, DBA (Direct Bonded Aluminum) substrate.
- the first conductor 24A and the second conductor 24B are each plate-like members made of metal. This metal is for example Cu or a Cu alloy.
- the first conductors 24A and the second conductors 24B are spaced apart in the first direction x as shown in FIGS. 7, 13 and 14 .
- the first conductor 24A and the second conductor 24B are rectangular in plan view, as shown in FIG.
- the first conductor 24A and the second conductor 24B overlap when viewed in the first direction x.
- Each of the first conductor 24A and the second conductor 24B has, for example, a dimension of 15 mm or more and 25 mm or less (preferably 20 mm) in the first direction x, and a dimension of 30 mm or more and 40 mm or less (preferably 35 mm) in the second direction y. ), and the dimension in the thickness direction z is 1.5 mm or more and 3.0 mm or less (preferably 2.0 mm).
- These dimensions of the first conductor 24A and the second conductor 24B are not limited to the numerical examples described above, and can be changed as appropriate according to the specifications of the semiconductor device A1.
- the first conductor 24A includes a base material 241, a main surface bonding layer 242 and a back surface bonding layer 243, as shown in FIG.
- the second conductor 24B also includes a substrate 241, a main-surface bonding layer 242, and a back-surface bonding layer 243, like the first conductor 24A.
- the base material 241, the main-surface bonding layer 242, and the back-surface bonding layer 243 are similarly configured in the first conductor 24A and the second conductor 24B.
- the base material 241 is a plate-like member made of metal. This metal is Cu or a Cu alloy.
- the main surface bonding layer 242 is formed on the upper surface of the base material 241 (the surface facing upward in the thickness direction z).
- the main surface bonding layer 242 is a surface layer on the upper side in the thickness direction z of each of the first conductor 24A and the second conductor 24B.
- the main surface bonding layer 242 is Ag plating, for example.
- the back bonding layer 243 is formed on the lower surface of the base material 241 (the surface facing downward in the thickness direction z).
- the back bonding layer 243 is a surface layer on the lower side in the thickness direction z in each of the first conductor 24A and the second conductor 24B.
- the back surface bonding layer 243 is Ag-plated, for example.
- the first conductor 24A is joined to the first support portion 22A via a conductive joining material 25A.
- a plurality of first semiconductor elements 1A are provided with a conductive bonding material 61 (described later). are joined via a conductive joining material 61A).
- the rear surface electrodes 15 (drain) of the plurality of first semiconductor elements 1A are electrically connected to each other via the first conductors 24A.
- the second conductor 24B is joined to the second support portion 22B via a conductive joining material 25B.
- a plurality of second semiconductor elements 1B are formed on the upper surface (the surface facing upward in the thickness direction z) of the second conductor 24B with a conductive bonding material 61 (a conductive bonding material to be described later). They are joined via a joining material 61A).
- the rear surface electrodes 15 (drain) of the plurality of second semiconductor elements 1B are electrically connected to each other via the second conductors 24B.
- a plurality of recesses 240a are formed on the upper surface of each of the first conductor 24A and the second conductor 24B in the thickness direction z.
- Each recess 240a is recessed in the thickness direction z from the top surface of the first conductor 24A in the thickness direction z or from the top surface of the second conductor 24B in the thickness direction z.
- Each concave portion 240a is formed when the resin member 7 is molded.
- the two recesses 240a formed on the top surface of the first conductor 24A in the thickness direction z are spaced apart in the second direction y and overlap when viewed in the second direction y.
- the two recesses 240a formed on the upper surface of the second conductor 24B in the thickness direction z are spaced apart in the second direction y and overlap when viewed in the second direction y.
- the conductive bonding material 25A is interposed between the first supporting portion 22A and the first conductor 24A.
- the conductive bonding material 25A fixes the first conductor 24A to the first support portion 22A.
- the conductive bonding material 25B is interposed between the second supporting portion 22B and the second conductor 24B.
- the conductive bonding material 25B fixes the second conductor 24B to the second support portion 22B.
- the conductive bonding material 25A has a base layer 251, an upper layer 252 and a lower layer 253, as shown in FIG.
- the conductive bonding material 25B also has a base layer 251, an upper layer 252 and a lower layer 253, like the conductive bonding material 25A.
- the base layer 251, upper layer 252 and lower layer 253 are laminated together.
- Base layer 251, upper layer 252 and lower layer 253 are similarly configured in each conductive bonding material 25A, 25B.
- the base layer 251 is made of metal, such as Al or an Al alloy.
- Base layer 251 is, for example, a sheet material.
- the upper layer 252 is formed on the upper surface of the base layer 251 .
- the upper layer 252 is configured by Ag plating, for example.
- the upper layer 252 is interposed between the base layer 251 and the first conductor 24A.
- the upper layer 252 of the conductive bonding material 25A is bonded to the back bonding layer 243 of the first conductor 24A, for example, by solid-phase diffusion of metal.
- the upper layer 252 is interposed between the base layer 251 and the second conductor 24B.
- the upper layer 252 of the conductive bonding material 25B is bonded to the back bonding layer 243 of the second conductor 24B, for example, by solid phase diffusion of metal.
- a and B are bonded by solid phase diffusion
- a and B are fixed to each other in a state of direct contact at the bonding interface as a result of solid phase diffusion bonding. It can be said that A and B constitute a solid-phase diffusion bonding layer.
- the bonding interface may not be clearly present due to the diffusion of metal elements.
- inclusions such as an oxide film exist on the surface layers of A and B, or gaps exist between A and B, these inclusions and gaps may exist at the bonding interface. sell.
- the lower layer 253 is formed on the lower surface of the base layer 251 .
- the lower layer 253 is configured by Ag plating, for example.
- the conductive bonding material 25A the lower layer 253 is interposed between the base layer 251 and the first support portion 22A.
- the lower layer 253 of the conductive bonding material 25A is bonded to the bonding layer 221 on the first support portion 22A by solid-phase diffusion of metal, for example.
- the conductive bonding material 25B the lower layer 253 is interposed between the base layer 251 and the second support portion 22B.
- the lower layer 253 of the conductive bonding material 25B is bonded to the bonding layer 221 on the second support portion 22B by solid-phase diffusion of metal, for example.
- the lower layers 253 of the pair of conductive bonding materials 25A and 25B and the bonding layers 221 on the first support portion 22A and the bonding layer 221 on the second support portion 22B are bonded in direct contact with each other at the bonding interface. ing.
- each of the conductive bonding materials 25A and 25B is not limited to the example having the base layer 251, upper layer 252 and lower layer 253 described above, and may be solder, metal paste material, or sintered metal.
- the first power terminal 31 and the second power terminal 32 are each plate-like members made of metal. This metal is for example Cu or a Cu alloy.
- the first power terminal 31 includes an input terminal 31A and two input terminals 31B, and the second power terminal 32 includes two output terminals 32A.
- 31 A of input terminals are examples of a "1st input terminal”
- each input terminal 31B is an example of a "2nd input terminal.”
- a first power supply voltage is applied between the input terminal 31A and the two input terminals 31B. That is, the first power supply voltage is input to the first power supply terminal 31 .
- the input terminal 31A is, for example, a positive electrode (P terminal)
- each of the two input terminals 31B is, for example, a negative electrode (N terminal).
- the input terminal 31A may be the negative electrode (N terminal)
- each of the two input terminals 31B may be the positive electrode (P terminal).
- the wiring inside the package may be appropriately changed according to the change in the polarity of the terminals.
- a second power supply voltage is applied to each of the two output terminals 32A. That is, the second power supply voltage is input to the second power supply terminal 32 .
- Each of the plurality of input terminals 31A, 31B and the two output terminals 32A includes a portion covered with the resin member 7 and a portion exposed from the resin member 7. As shown in FIG.
- the input terminal 31A is, for example, integrally formed with the first conductor 24A, as shown in FIG. Unlike this configuration, the input terminal 31A may be separated from the first conductor 24A and conductively joined to the first conductor 24A. As shown in FIG. 7 and the like, the input terminal 31A is located on the opposite side of the plurality of second semiconductor elements 1B with respect to the plurality of first semiconductor elements 1A in the first direction x. The input terminal 31A is electrically connected to the first conductor 24A and to the back surface electrode 15 (drain) of each semiconductor element 1 via the first conductor 24A.
- Each of the two input terminals 31B is separated from the first conductor 24A as shown in FIG.
- a second conductive member 52 is joined to each of the two input terminals 31B.
- the two input terminals 31B are located on the same side as the input terminals 31A with respect to the plurality of first semiconductor elements 1A in the first direction x.
- Each of the two input terminals 31B is electrically connected to the second conductive member 52 and is also electrically connected to the second main surface electrode 12 (source) of each second semiconductor element 1B via the second conductive member 52 .
- the first power terminals 31 protrude from the resin member 7 in the first direction x in the semiconductor device A1.
- the input terminal 31A and the two input terminals 31B are separated from each other.
- the two input terminals 31B are located on opposite sides of the input terminal 31A in the second direction y.
- the input terminal 31A and the two input terminals 31B overlap each other when viewed in the second direction y.
- Each of the two output terminals 32A is formed integrally with, for example, the second conductor 24B, as can be understood from FIGS. Unlike this configuration, each of the two output terminals 32A may be separated from the second conductor 24B and conductively joined to the second conductor 24B. As shown in FIG. 7 and the like, the two output terminals 32A are located on the opposite side of the plurality of second semiconductor elements 1B from the plurality of first semiconductor elements 1A in the first direction x. Each output terminal 32A is electrically connected to the second conductor 24B and electrically connected to the back surface electrode 15 (drain) of each second semiconductor element 1B via the second conductor 24B.
- the number of output terminals 32A is not limited to two, and may be, for example, one or three or more.
- this one output terminal 32A is a conductive path to the first main surface electrode 11 (drain) of each second semiconductor element 1B through the second conductor 24B.
- the second conductor 24B is connected to the central portion in the second direction y.
- Each of the plurality of control terminals 33 is a pin-shaped terminal for controlling each semiconductor element 1 .
- the plurality of control terminals 33 includes a plurality of first control terminals 34 and a plurality of second control terminals 35, as shown in FIGS.
- the plurality of first control terminals 34 are used for controlling the plurality of first semiconductor elements 1A.
- the plurality of first control terminals 34 as shown in FIGS. 1 and 4, includes a first drive terminal 34A and a plurality of first detection terminals 34B-34D.
- the first drive terminal 34A is joined to the first conductive substrate 4A, as shown in FIGS.
- the first drive terminal 34A is electrically connected to each first main surface electrode 11 (gate) of the plurality of first semiconductor elements 1A.
- the first drive terminal 34A is an input terminal for a first drive signal.
- the first drive signal is an electrical signal for driving each of the plurality of first semiconductor elements 1A, and is a gate voltage in an example where each first semiconductor element 1A is a MOSFET.
- the first detection terminal 34B is joined to the first conductive substrate 4A, as shown in FIGS.
- the first detection terminal 34B is electrically connected to each second main surface electrode 12 (source) of the plurality of first semiconductor elements 1A.
- the first detection terminal 34B is an output terminal for the first detection signal.
- the first detection signal is an electrical signal for detecting the conduction state of the plurality of first semiconductor elements 1A.
- a pair of first detection terminals 34C are respectively joined to the first conductive substrate 4A, as shown in FIGS. Each of the pair of first detection terminals 34C is electrically connected to each of the pair of third main surface electrodes 13 of the first semiconductor element 1A having the diode function portion D1. The pair of first detection terminals 34C are terminals that are electrically connected to the diode function portion D1 of the first semiconductor element 1A.
- the first detection terminal 34D is joined to the first conductive substrate 4A, as shown in FIGS.
- the first detection terminal 34D is electrically connected to each rear surface electrode 15 (drain) of the plurality of first semiconductor elements 1A.
- the voltage of each rear surface electrode 15 of the plurality of first semiconductor elements 1A (voltage corresponding to the drain current) is applied to the first detection terminal 34D.
- the first detection terminal 34 ⁇ /b>D is a terminal (drain sense terminal) for detecting drain signals of the plurality of semiconductor elements 1 .
- the plurality of second control terminals 35 are used for controlling the plurality of second semiconductor elements 1B.
- the multiple second control terminals 35 as shown in FIGS. 1 and 4, include a second drive terminal 35A and multiple second detection terminals 35B and 35C.
- the second drive terminal 35A is joined to the second conductive substrate 4B, as shown in FIGS.
- the second drive terminal 35A is electrically connected to each first main surface electrode 11 (gate) of the plurality of second semiconductor elements 1B.
- the second drive terminal 35A is an input terminal for a second drive signal.
- the second drive signal is an electrical signal for driving each of the plurality of second semiconductor elements 1B, and is a gate voltage in an example where each second semiconductor element 1B is a MOSFET.
- the second detection terminal 35B is joined to the second conductive substrate 4B, as shown in FIGS.
- the second detection terminal 35B is electrically connected to each second main surface electrode 12 (source) of the plurality of second semiconductor elements 1B.
- the second detection terminal 35B is an output terminal for the second detection signal.
- the second detection signal is an electrical signal for detecting the conduction state of the plurality of second semiconductor elements 1B.
- a pair of second detection terminals 35C are joined to the second conductive substrate 4B, as shown in FIGS. 7 and 18, respectively.
- Each of the pair of second detection terminals 35C is electrically connected to each of the pair of third main surface electrodes 13 of the second semiconductor element 1B having the diode function portion D1.
- the pair of second detection terminals 35C are terminals that are electrically connected to the diode function portion D1 of the second semiconductor element 1B.
- the multiple control terminals 33 each include a holder 331 and a metal pin 333.
- a holder 331 and a metal pin 333 are similarly configured at each control terminal 33 .
- the holder 331 is made of a conductive material.
- the holder 331 is bonded to the conductive substrate 4 (either the first conductive substrate 4A or the second conductive substrate 4B) via a conductive bonding material 63, as shown in FIGS. .
- a metal pin 333 is inserted through the holder 331 .
- the holder 331 includes a cylindrical portion 331a, an upper flange portion 331b and a lower flange portion 331c.
- Cylindrical portion 331a is, for example, cylindrical, and in semiconductor device A1, is arranged in a circular posture in plan view.
- the metal pin 333 is inserted into the tubular portion 331a.
- the upper end flange portion 331b and the lower end flange portion 331c are arranged to sandwich the cylindrical portion 331a in the thickness direction z.
- Upper end flange portion 331b and lower end flange portion 331c are, for example, circular in plan view.
- the upper end flange portion 331b and the lower end flange portion 331c may be elliptical or polygonal (including rectangular) in plan view.
- the upper end flange portion 331b and the lower end flange portion 331c have the same shape and the same size in plan view.
- the upper end flange portion 331b and the lower end flange portion 331c are larger than the cylindrical portion 331a in plan view.
- the upper end collar portion 331b is connected to the edge of the cylindrical portion 331a on the upper side in the thickness direction z.
- the upper surface of the upper end collar portion 331 b is exposed from the resin member 7 (second projecting portion 752 described later) and is covered with the resin portion 77 .
- the lower end collar portion 331c is connected to the edge of the cylindrical portion 331a on the lower side in the thickness direction z.
- the lower end collar portion 331 c is joined to the conductive substrate 4 with a conductive joining material 63 .
- the holder 331 has a through hole 332 as shown in FIGS. As shown in FIG. 21, the through-hole 332 penetrates the holder 331 in the thickness direction z, and straddles the tubular portion 331a, the upper end flange portion 331b, and the lower end flange portion 331c in the thickness direction z. A metal pin 333 is inserted into the through hole 332 .
- the through hole 332 has a circular shape in plan view.
- the inner diameter of holder 331, that is, the diameter r1 of through hole 332 in plan view (see FIG. 8) is, for example, 0.5 mm or more and 1.0 mm or less.
- the through hole 332 is an example of a "first through hole".
- the metal pin 333 is a rod-shaped member extending in the thickness direction z.
- the metal pin 333 is supported by being press-fitted into the holder 331 .
- the metal pin 333 is inserted from above the holder 331 in the thickness direction z.
- the metal pin 333 is electrically connected to the conductive substrate 4 (main surface metal layer 42 described later) through the holder 331 .
- Metal pin 333 is, for example, a pin for a press-fit terminal. In the semiconductor device A1, the metal pin 333 extends straight from the holder 331 in the thickness direction z, but may be partially bent above the holder 331 in the thickness direction z.
- the metal pin 333 includes a straight portion 333a.
- the straight portion 333a extends along the thickness direction z.
- the straight portion 333 a is a portion of the metal pin 333 that is inserted into the through hole 332 . At least a portion of the straight portion 333 a contacts the inner surface of the holder 331 .
- the dimension d1 (see FIG. 21) of the straight portion 333a in the thickness direction z is 20% or more and 90% or less of the dimension of the holder 331 in the thickness direction z.
- the dimension d1 in the thickness direction z of the straight portion 333a is, for example, 2.0 mm. Note that the dimension d1 in the thickness direction z of the straight portion 333a corresponds to the amount of insertion of the metal pin 333 into the holder 331. As shown in FIG.
- the conductive substrate 4 supports a plurality of control terminals 33.
- the conductive substrate 4 is interposed between the support substrate 2 and the plurality of control terminals 33 .
- Conductive substrate 4 is composed of, for example, a DBC substrate.
- the conductive substrate 4 may be composed of a DBA substrate.
- the conductive substrate 4 may be configured by a printed circuit board instead of the DBC substrate.
- the conductive substrate 4 includes a first conductive substrate 4A and a second conductive substrate 4B, as shown in FIGS. 7 and 14 and the like.
- the first conductive substrate 4A is arranged on the first conductor 24A of the support substrate 2 .
- the first conductive substrate 4A supports a plurality of first control terminals 34 of the plurality of control terminals 33, that is, a first drive terminal 34A and a plurality of first detection terminals 34B-34D.
- the first conductive substrate 4A is bonded to the first conductor 24A via a bonding material 49, as shown in FIGS.
- the bonding material 49 may be conductive or insulating, and solder is used, for example.
- the second conductive substrate 4B is arranged on the second conductor 24B of the support substrate 2 .
- the second conductive substrate 4B supports a plurality of second control terminals 35 of the plurality of control terminals 33, that is, a second drive terminal 35A and a plurality of second detection terminals 35B and 35C.
- the second conductive substrate 4B is bonded to the second conductor 24B via a bonding material 49, as shown in FIG.
- the conductive substrate 4 (first conductive substrate 4A and second conductive substrate 4B, respectively) has an insulating layer 41, a main surface metal layer 42 and a back surface metal layer 43, as shown in FIGS.
- the insulating layer 41, the main surface metal layer 42, and the back surface metal layer 43 are similarly configured in the first conductive substrate 4A and the second conductive substrate 4B unless otherwise specified.
- Insulating layer 41 is made of ceramic, for example. This ceramic is for example AlN, SiN or Al 2 O 3 or the like.
- the insulating layer 41 has, for example, a rectangular shape in plan view. Insulating layer 41, as shown in FIG. 21, has main surface 41a and back surface 41b.
- the main surface 41a and the back surface 41b are spaced apart in the thickness direction z.
- the main surface 41a faces upward in the thickness direction z
- the back surface 41b faces downward in the thickness direction z.
- the main surface 41a and the back surface 41b are flat (or substantially flat).
- the main surface metal layer 42 is formed on the main surface 41a of the insulating layer 41, as shown in FIG. Each of the plurality of control terminals 33 is erected on the main surface metal layer 42 .
- a constituent material of the main surface metal layer 42 is, for example, Cu or a Cu alloy.
- the constituent material may be Al or an Al alloy instead of Cu or a Cu alloy.
- the thickness (dimension along the thickness direction z) of the principal surface metal layer 42 is, for example, 200 ⁇ m or more and 500 ⁇ m or less.
- the main surface metal layer 42 includes a plurality of conductive portions 421-424.
- the plurality of conductive parts 421 to 424 are separated from each other and insulated.
- the thickness direction of each conductive portion 421 to 424 is the same as the thickness direction z.
- the plan view shape of the plurality of conductive portions 421 to 424 is not limited to the illustrated example, and the specifications of the semiconductor device A1 (arrangement of each semiconductor element 1, The arrangement of the first power terminal 31 and the second power terminal 32, etc.) can be changed as appropriate.
- Each of the conductive portions 421 to 424 of the first conductive substrate 4A is an example of the "first conductive portion”
- each of the conductive portions 421 to 424 of the second conductive substrate 4B is an example of the "second conductive portion”.
- a plurality of wires 651 are joined to the conductive portion 421 , and the conductive portion 421 is electrically connected to the first principal surface electrode 11 (gate) of each semiconductor element 1 via each wire 651 .
- the first drive terminal 34A is joined to the conductive portion 421 of the first conductive substrate 4A
- the second drive terminal 34A is joined to the conductive portion 421 of the second conductive substrate 4B. 35A is joined.
- a plurality of wires 652 are joined to the conductive portion 422 , and the conductive portion 422 is electrically connected to the second principal surface electrode 12 (source) of each semiconductor element 1 via each wire 652 .
- the conductive portion 422 of the first conductive substrate 4A is joined to the first detection terminal 34B, and the conductive portion 422 of the second conductive substrate 4B is joined to the second detection terminal. 35B are joined.
- a wire 653 is joined to each of the pair of conductive portions 423 , and conducts to each third main surface electrode 13 of the semiconductor element 1 having the diode function portion D1 via the wire 653 .
- each first detection terminal 34C is joined to each conductive portion 423 of the first conductive substrate 4A, and each conductive portion 423 of the second conductive substrate 4B is connected to each A second detection terminal 35C is joined.
- a wire 654 is joined to the conductive portion 424 of the first conductive substrate 4A, as shown in FIG. As shown in FIGS. 7 and 20, the first detection terminal 34D is joined to the conductive portion 424 of the first conductive substrate 4A. None of the plurality of wires 641 to 645 are joined to the conductive portion 424 of the second conductive substrate 4B. None of the plurality of control terminals 33 are joined to the conductive portion 424 of the second conductive substrate 4B.
- the plurality of conductive portions 421-424 each have a terminal bonding surface 420a, an opening 420b and a through hole 420c. Terminal joint surfaces 420a, openings 420b and through-holes 420c are similarly formed in the respective conductive portions 421 to 424 of the first conductive substrate 4A and the second conductive substrate 4B.
- the terminal joint surface 420a faces upward in the thickness direction z.
- a holder 331 of each control terminal 33 is joined to the terminal joint surface 420a via a conductive joint material 63, which will be described later.
- the terminal joint surface 420a is flat (or substantially flat).
- the opening 420b is formed in the terminal joint surface 420a. As shown in FIG. 8, at least a portion of the outer peripheral edge of the opening 420b is inside the outer peripheral edge 331d of the holder 331 in plan view. Note that the outer peripheral edge 331d of the holder 331 is the outer peripheral edge of the edge of the holder 331 closer to the terminal joint surface 420a in the thickness direction z. Therefore, in a configuration in which the holder 331 has the lower end flange 331c, the outer peripheral edge 331d of the holder 331 in plan view is the outer peripheral edge of the lower end flange 331c in plan view. In the semiconductor device A1, as shown in FIG.
- the opening 420b is formed such that the outer peripheral edge in plan view is concentric with the outer peripheral edge 331d of the holder 331 in plan view. Moreover, as understood from FIGS. 8 and 21, in plan view, the outer peripheral edge of the opening 420b entirely overlaps the lower end flange 331c.
- a diameter r2 (see FIG. 8) of opening 420b in plan view is, for example, 0.8 mm or more and 1.6 mm or less.
- the through-hole 420c is connected to the opening 420b and passes through the conductive parts 421 to 424 in the thickness direction z from the opening 420b.
- the conductive bonding material 63 is partially formed in the through hole 420c, and the inner surface of the through hole 420c is in contact with the conductive bonding material 63.
- the inner surface of the through-hole 420c is tapered in the thickness direction z from the side connected to the opening 420b to the side contacting the insulating layer 41 . Unlike this configuration, the inner surface of the through hole 420c does not have to be tapered.
- the back metal layer 43 is formed on the back surface 41b of the insulating layer 41, as shown in FIG.
- the back metal layer 43 of the first conductive substrate 4A is bonded to the first conductor 24A via a bonding material 49, as shown in FIGS.
- the back metal layer 43 of the second conductive substrate 4B is bonded to the second conductor 24B via a bonding material 49, as shown in FIGS.
- the conducting member 5 constitutes the path of the main circuit current switched by the plurality of semiconductor elements 1 together with the support substrate 2 .
- the conductive member 5 is separated from the support substrate 2 in the thickness direction z and overlaps the support substrate 2 in plan view.
- the conduction member 5 is configured by a plate-like member made of metal.
- the metal is for example Cu or a Cu alloy.
- Conducting member 5 is partially bent.
- Conductive member 5 includes a plurality of first conductive members 51 and second conductive members 52 .
- the main circuit current includes a first main circuit current and a second main circuit current.
- the first main circuit current is the current that flows between the input terminal 31A and the output terminal 32A.
- the second main circuit current is the current that flows between the output terminal 32A and the input terminal 31B.
- the plurality of first conduction members 51 are respectively joined to the respective second main surface electrodes 12 (sources) and the second conductors 24B of the plurality of first semiconductor elements 1A, and are connected to the respective second conductors 24B of the plurality of first semiconductor elements 1A. Conduction is established between the principal surface electrode 12 and the second conductor 24B.
- each first conductive member 51, each second main surface electrode 12 of the plurality of first semiconductor elements 1A, and each first conductive member 51 and second conductor 24B are, as shown in FIG. They are bonded via a conductive bonding material 591 .
- Conductive bonding material 591 is, for example, solder, metal paste material, or sintered metal.
- each first conductive member 51 has a strip shape extending in the first direction x in plan view.
- the number of first conduction members 51 is three corresponding to the number of first semiconductor elements 1A. Unlike this configuration, for example, one first conductive member 51 may be shared by a plurality of first semiconductor elements 1A without depending on the number of the plurality of first semiconductor elements 1A.
- the second conduction member 52 conducts each second main surface electrode 12 (source) of the plurality of second semiconductor elements 1B and each input terminal 31B.
- the second conductive member 52 has a maximum dimension in the first direction x of, for example, 25 mm or more and 40 mm or less (preferably 32 mm), and a maximum dimension in the second direction y of, for example, 30 mm or more and 45 mm or less (preferably 38 mm). These dimensions of the second conductive member 52 are not limited to the numerical examples described above, and can be changed as appropriate according to the specifications of the semiconductor device A1.
- the second conducting member 52 includes a pair of first wiring portions 521, a second wiring portion 522, a third wiring portion 523 and a plurality of fourth wiring portions 524, as shown in FIGS.
- One of the pair of first wiring portions 521 is connected to one of the pair of input terminals 31B, and the other of the pair of first wiring portions 521 is connected to the other of the pair of input terminals 31B.
- Each first wiring portion 521 and each input terminal 31B are joined by a conductive joining material 592, as shown in FIGS.
- Conductive bonding material 592 is, for example, solder, metal paste material, sintered metal, or the like.
- each of the pair of first wiring portions 521 has a strip shape extending in the first direction x in plan view. The pair of first wiring portions 521 are spaced apart in the second direction y and arranged parallel (or substantially parallel).
- the second wiring portion 522 is connected to both of the pair of first wiring portions 521, as shown in FIGS.
- the second wiring portion 522 is a strip-shaped portion extending in the second direction y in plan view. As understood from FIGS. 5 and 6, the second wiring portion 522 overlaps the plurality of second semiconductor elements 1B in plan view.
- the second wiring portion 522 is connected to each second semiconductor element 1B, as shown in FIG.
- the second wiring portion 522 has a plurality of recessed regions 522a. As shown in FIG. 17, each of the plurality of recessed regions 522a protrudes downward in the thickness direction z from the other portions of the second wiring portion 522. As shown in FIG.
- Conductive bonding material 593 is, for example, solder, metal paste material, sintered metal, or the like.
- the third wiring portion 523 is connected to both of the pair of first wiring portions 521, as shown in FIGS.
- the third wiring portion 523 has a strip shape extending in the second direction y in plan view.
- the third wiring portion 523 is separated from the second wiring portion 522 in the first direction x.
- the third wiring portion 523 is arranged parallel (or substantially parallel) to the second wiring portion 522 .
- the third wiring portion 523 overlaps the plurality of first semiconductor elements 1A in plan view.
- the third wiring portion 523 has a plurality of convex regions 523a. As shown in FIG. 16, each convex region 523a protrudes upward in the thickness direction z from other portions of the third wiring portion 523. As shown in FIG. As shown in FIG. As shown in FIG.
- each convex region 523a overlaps each first semiconductor element 1A in plan view. Since the third wiring portion 523 has a plurality of convex regions 523a, as shown in FIG. 16, regions are provided on the first semiconductor elements 1A to join the first conduction members 51. As shown in FIG. This can prevent the third wiring portion 523 from coming into contact with each of the first conduction members 51 .
- Each of the plurality of fourth wiring portions 524 is connected to both the second wiring portion 522 and the third wiring portion 523 as shown in FIGS.
- Each fourth wiring portion 524 has a strip shape extending in the first direction x in plan view.
- the plurality of fourth wiring portions 524 are spaced apart in the second direction y and arranged parallel (or substantially parallel) in plan view.
- One end of each of the plurality of fourth wiring portions 524 in the first direction x is connected to a portion of the third wiring portion 523 that overlaps between two first semiconductor elements 1A adjacent to each other in the second direction y in plan view.
- the other end in the first direction x is connected to a portion of the second wiring portion 522 that overlaps between two second semiconductor elements 1B adjacent in the second direction y in plan view.
- openings 53 are formed in the pair of first wiring portions 521 of the second conducting member 52, respectively.
- Each opening 53 is a partially excised portion when viewed from above.
- the opening 53 is positioned so as to overlap the first conductor 24A and not overlap the first semiconductor elements 1A in plan view.
- Each opening 53 is, for example, a through hole penetrating in the thickness direction z, as shown in FIG.
- Each opening 53 is provided in a portion overlapping near at least two corners of the first conductor 24A in plan view. It is provided on the side near the terminal 31 .
- the planar shape of each opening 53 is not limited, and may be a hole as in the examples of FIGS. 5 to 7, or may be a notch unlike this example.
- a plurality of conductive bonding materials 61 respectively bond each semiconductor element 1 and the support substrate 2 .
- the multiple conductive bonding materials 61 include multiple conductive bonding materials 61A and multiple conductive bonding materials 61B.
- each of the plurality of conductive bonding materials 61A is interposed between the first conductor 24A and each first semiconductor element 1A.
- a plurality of conductive bonding materials 61A are respectively fixed to the first semiconductor elements 1A and the first conductors 24A.
- each of the plurality of conductive bonding materials 61B is interposed between the second conductor 24B and each second semiconductor element 1B.
- Each of the plurality of conductive bonding materials 61B fixes each second semiconductor element 1B to the second conductor 24B.
- Each of the plurality of conductive bonding materials 61 has a base layer 611, an upper layer 612 and a lower layer 613, as shown in FIG.
- a base layer 611, an upper layer 612 and a lower layer 613 are laminated together.
- the base layer 611, the upper layer 612 and the lower layer 613 are configured similarly in each conductive bonding material 61 (each conductive bonding material 61A, 61B) unless otherwise specified.
- the base layer 611 is made of metal, such as Al or an Al alloy.
- Base layer 611 is, for example, a sheet material.
- the upper layer 612 is formed on the upper surface of the base layer 611, as shown in FIG.
- the upper layer 612 is interposed between the base layer 611 and the first semiconductor element 1A, as shown in FIG.
- the upper layer 612 of the conductive bonding material 61A is bonded to the back surface electrode 15 of the first semiconductor element 1A by solid-phase diffusion of metal, for example.
- the upper layer 612 is interposed between the base layer 611 and the second semiconductor element 1B.
- the upper layer 612 of the conductive bonding material 61B is bonded to the back electrode 15 of the second semiconductor element 1B, for example, by solid-phase diffusion of metal.
- the upper layers 612 of the pair of conductive bonding materials 61A and 61B and the backside electrodes 15 of the first semiconductor element 1A and the second semiconductor element 1B are bonded in direct contact with each other at the bonding interface. .
- the lower layer 613 is formed on the lower surface of the base layer 611, as shown in FIG.
- the lower layer 613 is interposed between the base layer 611 and the first conductor 24A, as shown in FIG.
- the lower layer 613 of the conductive bonding material 61A is bonded to the main surface bonding layer 242 of the first conductor 24A by solid phase diffusion of metal, for example.
- conductive bonding material 61B lower layer 613 is interposed between base layer 611 and second conductor 24B.
- the lower layer 613 of the conductive bonding material 61B is bonded to the main surface bonding layer 242 of the second conductor 24B, for example, by solid-phase diffusion of metal.
- the respective lower layers 613 of the pair of conductive bonding materials 61A and 61B and the principal surface bonding layers 242 of the first conductor 24A and the second conductor 24B are bonded in direct contact with each other at the bonding interface. ing.
- Each conductive bonding material 61 is not limited to the structure having the above-described base layer 611, upper layer 612 and lower layer 613, and may be solder, metal paste material, sintered metal, or the like. may
- a plurality of conductive bonding materials 63 conductively bond each holder 331 of each control terminal 33 and the main surface metal layer 42 of each conductive substrate 4 (first conductive substrate 4A and second conductive substrate 4B).
- the plurality of conductive bonding materials 63 are solder, for example.
- the multiple conductive bonding materials 63 include multiple conductive bonding materials 63A and multiple conductive bonding materials 63B.
- the conductive bonding material 63A is applied to each of the plurality of first control terminals 34 (the first drive terminal 34A and the plurality of first detection terminals 34B to 34D) and the main surface of the first conductive substrate 4A.
- the conductive portions 421 to 424 of the metal layer 42 are joined together.
- each conductive bonding material 63A bonds the holder 331 of the first drive terminal 34A to the conductive portion 421 of the main surface metal layer 42 of the first conductive substrate 4A.
- the holder 331 of the detection terminal 34B is joined to the conductive portion 422 of the main surface metal layer 42 of the first conductive substrate 4A, and each holder 331 of the pair of first detection terminals 34C is connected to the main surface metal layer 42 of the first conductive substrate 4A.
- Each conductive portion 423 is joined, and the holder 331 of the first detection terminal 34D is joined to the conductive portion 424 of the main surface metal layer 42 of the first conductive substrate 4A.
- the conductive bonding material 63B is applied to each of the plurality of second control terminals 35 (the second drive terminals 35A and the plurality of second detection terminals 35B and 35C) and each conductive portion of the main surface metal layer 42 of the second conductive substrate 4B. 421 to 424 are joined.
- each conductive bonding material 63B bonds the holder 331 of the second drive terminal 35A to the conductive portion 421 of the main surface metal layer 42 of the second conductive substrate 4B.
- the detection terminals 35B are joined to the conductive portions 422 of the main surface metal layer 42 of the second conductive substrate 4B, and the pair of second detection terminals 35C are joined to the respective conductive portions 423 of the main surface metal layer 42 of the second conductive substrate 4B.
- each of the plurality of conductive bonding materials 63 is formed in the thickness direction z by the holder 331 (lower end flange 331c) of each control terminal 33 and the conductive substrate 4 (first conductive substrate). It is sandwiched between the main surface metal layers 42 (each of the conductive portions 421 to 424) of the substrate 4A and the second conductive substrate 4B, respectively.
- the thickness of the sandwiched portion is, for example, 20 ⁇ m or more and 70 ⁇ m or less. Within this range, it is possible to secure an appropriate thinness while securing an appropriate bonding strength.
- each outer peripheral edge of the plurality of conductive bonding materials 63 is outside the outer peripheral edge 331 d of the holder 331 of each control terminal 33 in plan view.
- the plurality of conductive bonding materials 63 each include an inflow portion 631 and a filling portion 632.
- the inflow portion 631 is a portion of each conductive bonding material 63 that is formed inside the through hole 332 of the holder 331 .
- the upper surface of the inflow portion 631 has an arcuate shape when viewed in a direction perpendicular to the thickness direction z (for example, the first direction x), and curves downward in the thickness direction z.
- the top surface of inlet 631 may be flat.
- the shape of the upper surface of the inflow portion 631 may be curved in an arc shape or flattened depending on the type of surface treatment of the holder 331 and the type of the conductive bonding material 63 (solder).
- a ratio (h1/r1 ⁇ 100) of the dimension h1 in the thickness direction z of the inflow portion 631 to the inner diameter of the holder 331 (diameter r1 of the through hole 332) is, for example, 10% or more and 65% or less.
- the dimension h1 in the thickness direction z of the inflow portion 631 is, for example, 100 ⁇ m or more and 500 ⁇ m or less.
- the filling portion 632 is a portion of each conductive bonding material 63 that is formed inside the through hole 420c.
- a lower surface of the filling portion 632 is curved in an arc shape.
- the configuration of the conductive bonding material 63 shown in FIG. 21 is an example in which the diameter r2 of the opening 420b in plan view is
- each conductive bonding material 63 is solder, and each insulating layer 41 of the first conductive substrate 4A and the second conductive substrate 4B is ceramic.
- 63 has low affinity (low wettability). Therefore, as shown in FIG. 21, a gap 630 is formed between the conductive bonding material 63 and the insulating layer 41 .
- the insulating layer 41 has a low affinity for the conductive bonding material 63 , so the conductive bonding material 63 is less likely to come into contact with the insulating layer 41 , and voids 630 remain after the conductive bonding material 63 is cured. It is from.
- At least a portion of the exposed portion 410 of the insulating layer 41 is not in contact with the conductive bonding material 63 due to the gap 630 , as shown in FIG. 21 .
- each conductive bonding material 63 is solder, and each main surface metal layer 42 of the first conductive substrate 4A and the second conductive substrate 4B is Cu or a Cu alloy.
- the layer 42 has a high affinity (high wettability) for each conductive bonding material 63 . Therefore, as shown in FIG. 21, each conductive bonding material 63 is in contact with the inner surface of the through hole 420c.
- each conductive bonding material 63 is solder, and each holder 331 of the plurality of control terminals 33 is made of Cu or a Cu alloy. high wettability (high wettability). Therefore, as shown in FIG. 21, each conductive bonding material 63 flows into the through hole 332 of each holder 331 to form an inflow portion 631 . However, depending on the amount of each conductive bonding material 63 and the volume of each through hole 420c, the inflow portion 631 may not be formed.
- Each of the plurality of wires 651-654 electrically connects two parts separated from each other.
- Each of the plurality of wires 651-654 is, for example, a bonding wire.
- Each constituent material of the plurality of wires 651 to 654 includes, for example, Au (gold), Al or Cu.
- the multiple wires 651 include multiple first wires 651A and multiple second wires 651B.
- the plurality of first wires 651A are respectively connected to the first main surface electrode 11 (gate) of each first semiconductor element 1A and the conductive portion 421 of the main surface metal layer 42 of the first conductive substrate 4A. , making them conductive.
- the plurality of second wires 651B are respectively connected to the first main surface electrode 11 (gate) of each second semiconductor element 1B and the conductive portion 421 of the main surface metal layer 42 of the second conductive substrate 4B. , making them conductive.
- the multiple wires 652 include multiple first wires 652A and multiple second wires 652B.
- the plurality of first wires 652A are respectively connected to the second main surface electrode 12 (source) of each first semiconductor element 1A and the conductive portion 422 of the main surface metal layer 42 of the first conductive substrate 4A. , making them conductive.
- the plurality of second wires 652B are respectively connected to the second main surface electrode 12 (source) of each second semiconductor element 1B and the conductive portion 422 of the main surface metal layer 42 of the second conductive substrate 4B. , making them conductive. Note that when each semiconductor element 1 has an additional electrode for source sense, the first wire 652A and the second wire 652B are used for the additional electrode for source sense instead of the second main surface electrode 12 (source). Bonded to the electrode.
- the multiple wires 653 include a pair of first wires 653A and a pair of second wires 653B.
- the pair of first wires 653A are connected to each of the third main surface electrodes 13 of the first semiconductor element 1A having the diode function portion D1 and each of the main surface metal layers 42 of the first conductive substrate 4A. It is joined to the conductive portion 423 to make them conductive.
- the pair of second wires 654B are respectively connected to the third main surface electrodes 13 of the second semiconductor element 1B having the diode function portion D1 and the main surface metal layer 42 of the second conductive substrate 4B. It is joined to the conductive portion 423 to make them conductive.
- the wire 654 is joined to the first conductor 24A and the conductive portion 424 of the first conductive substrate 4A to conduct them.
- the resin member 7 includes the plurality of semiconductor elements 1, a portion of the supporting substrate 2, a portion of each of the first power terminals 31 and the second power terminals 32, and the conductive substrate 4 (the first conductive substrate 4A and the second conductive substrate). It covers the substrate 4B), the conductive member 5 (the first conductive member 51 and the second conductive member 52), the plurality of conductive bonding members 61 and 63, and the plurality of wires 651 to 654, respectively.
- Resin member 7 is made of, for example, an insulating resin material. This resin material is, for example, an epoxy resin.
- the resin member 7 is formed by molding, for example.
- the resin member 7 has, for example, a dimension in the first direction x of 35 mm or more and 60 mm or less, a dimension in the second direction y of 35 mm or more and 50 mm or less, and a dimension of the thickness direction z of 4 mm or more and 15 mm or less. These dimensions are the largest part sizes along each direction. These dimensions of the resin member 7 are not limited to the above examples, and can be changed as appropriate according to the specifications of the semiconductor device A1.
- the resin member 7 has a resin main surface 71, a resin back surface 72 and a plurality of resin side surfaces 731-734.
- the resin main surface 71 and the resin back surface 72 are spaced apart in the thickness direction z, as shown in FIGS.
- the resin main surface 71 faces upward in the thickness direction z
- the resin back surface 72 faces downward in the thickness direction z.
- a plurality of control terminals 33 protrude from the resin main surface 71 .
- the resin back surface 72 has a frame shape surrounding the lower surface (the surface facing downward in the thickness direction z) of the main surface metal layer 42 of the conductive substrate 4 in plan view.
- the lower surface of the main surface metal layer 42 is exposed from the resin back surface 72 .
- the resin back surface 72 is flush with the bottom surface of the main surface metal layer 42 .
- Each of the plurality of resin side surfaces 731 to 734 is connected to both the resin main surface 71 and the resin back surface 72 and sandwiched between them in the thickness direction z. As shown in FIGS. 4, 9, 10, etc., the resin side surface 731 and the resin side surface 732 are spaced apart in the first direction x.
- the resin side surface 732 faces one of the first directions x, and the resin side surface 731 faces the other of the first direction x.
- FIG. 1 As shown in FIGS. 4 and 10 to 12, the resin side surface 733 and the resin side surface 734 are spaced apart in the second direction y.
- the resin side surface 734 faces one side in the second direction y, and the resin side surface 733 faces the other side in the second direction y.
- the resin side surface 732 is formed with a plurality of recesses 732a.
- Each recess 732a is a portion recessed in the first direction x in plan view.
- the plurality of recesses 732a are formed between the input terminal 31A and one of the pair of input terminals 31B and between the input terminal 31A and the other of the pair of input terminals 31B in plan view. There is.
- the plurality of recesses 732a provide a creepage distance along the resin side surface 732 between the input terminal 31A and one of the pair of input terminals 31B, and a creepage distance along the resin side surface 732 between the input terminal 31A and the other of the pair of input terminals 31B. provided to increase the distance, respectively.
- the resin member 7 has a plurality of first protrusions 751, a plurality of second protrusions 752, and resin voids 76, as shown in FIGS.
- Each of the plurality of first protrusions 751 protrudes from the resin main surface 71 in the thickness direction z, as shown in FIG.
- the plurality of first protrusions 751 are arranged near the four corners of the resin member 7 in plan view.
- a first projecting end surface 751a is formed at the tip of each first projecting portion 751 (the upper end in the thickness direction z).
- Each first protruding end face 751a of the plurality of first protruding portions 751 is parallel (or substantially parallel) to the resin main surface 71 and on the same plane (xy plane).
- Each first projecting portion 751 has, for example, a bottomed hollow truncated cone shape.
- the plurality of first projecting portions 751 are used as spacers when the semiconductor device A1 is mounted on a control circuit board or the like of the device that uses the power source generated by the semiconductor device A1.
- the shape of each first projecting portion 751 may be columnar, and is preferably columnar.
- the plurality of second protrusions 752 protrude from the resin main surface 71 in the thickness direction z, as shown in FIG. 14 and the like.
- the plurality of second protrusions 752 overlap the plurality of control terminals 33 in plan view.
- Each metal pin 333 of the plurality of control terminals 33 protrudes from each second protrusion 752 .
- a part of the holder 331 (the upper surface of the upper end collar portion 331b) is exposed from the upper end surface of each second projecting portion 752 .
- Each second protrusion 752 has a truncated cone shape.
- a resin portion 77 is arranged on each second projecting portion 752 .
- the resin portion 77 is provided on the second projecting portion 752 of the resin member 7, as shown in FIG.
- the resin portion 77 covers a portion of the holder 331 exposed from the resin member 7 (the upper surface of the upper end collar portion 331 b ) and a portion of the metal pin 333 at each control terminal 33 .
- the resin portion 77 is made of, for example, an insulating resin material (for example, epoxy resin) like the resin member 7 , but may be made of a material different from that of the resin member 7 .
- Resin portion 77 is formed by resin potting, for example, after inserting metal pin 333 into holder 331 .
- the resin void 76 communicates with the recess 240a from the resin main surface 71 in the thickness direction z.
- the resin void 76 is tapered from the resin main surface 71 to the recess 240a such that the cross-sectional area decreases in the thickness direction z.
- the resin filling portion 78 is filled in the resin void portion 76 so as to fill the resin void portion 76 .
- the resin-filled portion 78 is made of an insulating resin material (for example, epoxy resin) like the resin member 7 , but may be made of a material different from that of the resin member 7 .
- Resin-filled portion 78 is formed, for example, by resin potting. The edge of the resin-filled portion 78 on the lower side in the thickness direction z contacts the concave portions 240a of the first conductor 24A and the second conductor 24B.
- the actions and effects of the semiconductor device A1 are as follows.
- the semiconductor device A1 has a bonding structure including a conductive substrate 4 (first conductive substrate 4A or second conductive substrate 4B), control terminals 33, and conductive bonding material 63.
- the conductive substrate 4 (first conductive substrate 4A or second conductive substrate 4B) has conductive portions 421-424.
- Control terminal 33 includes holder 331 and metal pin 333 .
- the conductive joint material 63 joins the conductive portions 421 to 424 and the control terminal 33 .
- the holder 331 has a through hole 332 .
- the through-hole 332 penetrates the holder 331 in the thickness direction z, and a portion (straight portion 333a) of the metal pin 333 is inserted therein.
- Each of the conductive portions 421 to 424 has a terminal joint surface 420a to which the holder 331 is joined, and an opening 420b formed in the terminal joint surface 420a.
- the conductive bonding material 63 is used when the holder 331 is bonded to the conductive portions 421 to 424. may flow into the through-hole 332 and a sufficient amount of terminal insertion may not be ensured.
- the bonding structure of the semiconductor device A1 the amount of the conductive bonding material 63 flowing into the through hole 332 is suppressed by the opening 420b.
- the bonding structure of the semiconductor device A1 can appropriately insert the metal pin 333 into the holder 331 , so that the metal pin 333 can be prevented from falling out of the holder 331 .
- the dimension d1 (see FIG. 21) in the thickness direction z of the straight portion 333a of the metal pin 333 is 20% or more and 90% or less (preferably 60% or more and 85%) of the dimension of the holder 331 in the thickness direction z. % or less), it can be said that the metal pin 333 is properly inserted into the holder 331 .
- the diameter r2 of the opening 420b is 0.8 mm
- the inner diameter of the holder 331 is 0.74 mm
- the amount of the conductive bonding material 63 creeping up into the through hole 332 is was simulated.
- the crawl-up amount corresponds to the dimension h1 (see FIG. 21) in the thickness direction z of the inflow portion 631 to be formed.
- the creeping amount of the conductive bonding material 63 was 500 ⁇ m or more when the opening 420b was not provided, whereas it was 450 ⁇ m or less when the opening 420b was provided. That is, it was confirmed that the amount of the conductive bonding material 63 creeping up into the holder 331 (the through hole 332) was suppressed by providing the opening 420b.
- the outer peripheral edge of the opening 420b is inside the outer peripheral edge 331d of the holder 331 in plan view.
- the outer peripheral edge 331d is the outer peripheral edge of the lower edge of the holder 331 in the thickness direction z. According to this configuration, since at least a part of the lower end of the holder 331 in the thickness direction z faces the terminal joint surface 420a, the lower end does not enter the opening 420b.
- the lower end of the holder 331 in the thickness direction z were to enter the opening 420b, the amount of the conductive bonding material 63 creeping up into the through hole 332 would increase, and the amount of insertion of the metal pin 333 into the holder 331 would be moderate. may not be guaranteed. Therefore, in the bonding structure of the semiconductor device A1, the lower end of the holder 331 in the thickness direction z does not enter the opening 420b. An appropriate amount of insertion of the metal pin 333 can be ensured.
- the holder 331 includes a tubular portion 331a and a lower end collar portion 331c.
- the outer peripheral edge of the lower end collar portion 331c is all outside the outer peripheral edge of the cylindrical portion 331a.
- each conductive bonding material 63 includes an inflow portion 631 formed in the through hole 332 of the holder 331. According to this configuration, the conductive bonding material 63 can increase the bonding strength between the holder 331 and the conductive portions 421 to 424 by the inflow portion 631 .
- the ratio of the dimension h1 in the thickness direction z of the inflow portion 631 to the diameter r1 of the through hole 332 is 10% or more and 65% or less. According to this configuration, since the ratio is 10% or more, the bonding strength is increased, and since the ratio is 65% or less, an appropriate amount of insertion of the metal pin 333 into the holder 331 can be ensured.
- each conductive bonding material 63 is outside the outer peripheral edge 331d of the holder 331 of each control terminal 33 in plan view. According to this configuration, the conductive bonding material 63 is interposed between the lower end collar portion 331c of each holder 331 and the terminal bonding surface 420a of each of the conductive portions 421-424 in the thickness direction z. Therefore, the holder 331 of each control terminal 33 is appropriately joined to each conductive portion 421-424.
- a plurality of control terminals 33 are connected to a control system circuit board on which the semiconductor device A1 is mounted.
- the control system circuit board may be arranged, for example, above the semiconductor device A1 in the thickness direction z.
- a first power terminal 31 (a plurality of input terminals 31A and 31B) and a second power terminal 32 (two output terminals 32A) are connected to a power system circuit board on which the semiconductor device A1 is mounted.
- the power system circuit board may be arranged, for example, next to the semiconductor device A1 in the first direction x.
- the power circuit board to which the first power terminal 31 and the second power terminal 32 are connected and the control circuit board to which each control terminal 33 (metal pin 333) is connected are arranged in the thickness direction. z can be spaced apart.
- FIG. 23 Another configuration example of the joint structure of the present disclosure will be described with reference to FIGS. 23 to 30.
- FIG. 23 is a diagrammatic representation of the joint structure of the present disclosure.
- FIG. 23 shows a configuration example in which the diameter r2 of the opening 420b is made larger than the diameter r2 of the opening 420b in the semiconductor device A1 in the bonding structure between the conductive portions 421 to 424 and the control terminals 33.
- FIG. 23 is an enlarged sectional view of a main part corresponding to FIG. 21.
- FIG. FIG. 23 shows an example of the conductive bonding material 63 when the diameter r2 of the opening 420b in plan view is about 1.6 mm, for example.
- the conductive bonding material 63 does not include the inflow portion 631 because the gap 630 is connected to the through hole 332 . This is because the volume of the through-hole 420c is increased by increasing the diameter r2 of the opening 420b.
- FIG. 24 shows a configuration example in which a depression 420d is provided in each of the conductive portions 421 to 424 instead of the through hole 420c in the joint structure between the conductive portions 421 to 424 and each control terminal 33.
- FIG. 24 is an enlarged cross-sectional view of a main part corresponding to FIG. 21.
- the depression 420d is connected to the opening 420b similarly to the through hole 420c.
- the depth of recess 420d is, for example, 50 ⁇ m or more and 200 ⁇ m or less.
- the depth of the recess 420d is the dimension along the thickness direction z from the terminal bonding surface 420a to the bottom of the recess 420d.
- a depression 420d may be formed instead of the through hole 420c. This is because even the depression 420d can ensure an appropriate volume.
- the thickness of main surface metal layer 42 dimension in thickness direction z of conductive parts 421 to 424.
- the conductive bonding material 63 is not in contact with the insulating layer 41, so the filling portion 632 fills the entire recess 420d. In other words, in the joint structure shown in FIG. 24, no gap 630 is formed.
- FIG. 25 to 30 show configuration examples in which the shapes of the openings 420b in plan view are different in the joining structure between the conductive parts 421 to 424 and the control terminals 33.
- FIG. 25 to 30 are enlarged views of essential parts corresponding to FIG. However, in FIGS. 25 to 30, the holder 331 of each control terminal 33 is shown by imaginary lines, and the metal pin 333 and each conductive bonding material 63 of each control terminal 33 are omitted.
- the openings 420b of the conductive parts 421 to 424 overlap the through holes 332 in plan view. That is, the bonding structure shown in FIG. 25 has a smaller diameter r2 of the opening 420b in plan view than the bonding structure in the semiconductor device A1.
- the opening 420b of each of the conductive parts 421 to 424 is formed in an elliptical shape in plan view, and a part of the outer peripheral edge of the opening 420b is part of the holder 331 in plan view. It is outside the outer peripheral edge 331d.
- the longitudinal direction of the opening 420b in plan view is along the first direction x.
- the openings 420b of the conductive parts 421 to 424 are formed in a rectangular shape in plan view.
- the openings 420b of the conductive portions 421 to 424 are formed in a rectangular shape in plan view, but unlike the example shown in FIG. A part of the outer peripheral edge of the opening 420 b is outside the outer peripheral edge 331 d of the holder 331 when viewed.
- the longitudinal direction of the opening 420b in plan view is along the first direction x.
- each of the conductive parts 421 to 424 has a plurality of openings 420b, and each of the plurality of openings 420b is linear in plan view.
- the plurality of openings 420b each extend in the second direction y and are arranged parallel to each other.
- each of the plurality of openings 420b extends along the second direction y, but each may extend along any direction perpendicular to the thickness direction z.
- the openings 420b of the conductive parts 421 to 424 are arranged in a grid pattern in which two stripes along the first direction x and two stripes along the second direction y intersect each other in plan view. formed.
- each of the number of stripes along the first direction x and the number of stripes along the second direction y may be three or more.
- each stripe along the first direction x and each stripe along the second direction y are not limited to being perpendicular to each other as shown in FIG. 30, and may intersect each other.
- the outer peripheral edge of the opening 420b is at least A part of it is inside the outer peripheral edge 331 d of the holder 331 . Therefore, it is possible to prevent the conductive bonding material 63 from creeping up into the through hole 332 , and to secure an appropriate amount of insertion of the metal pin 333 into the holder 331 .
- the plurality of control terminals 33 includes holders 331 and metal pins 333.
- both or one of the first power terminal 31 and the second power terminal 32 may be configured.
- the second power supply terminal 32 (each output terminal 32 ⁇ /b>A) may include a holder and a metal pin similar to the holder 331 and metal pin 333 of each control terminal 33 .
- FIG. 31 shows a semiconductor device according to such a modification.
- the holder of each output terminal 32A is joined, for example, to the second conductor 24B.
- a through-hole or depression similar to the through-hole 420c or depression 420d may be formed in a portion of the second conductor 24B where the holder of each output terminal 32A is joined.
- the metal pins thicker than the metal pins 333 of the plurality of control terminals 33 .
- the joint structure of the present disclosure is not limited to signal terminals, and can also be applied to power supply terminals.
- junction structure of the present disclosure shows an example applied to a semiconductor device including a switching element, it can be , transformers, capacitors and integrated circuits).
- junction structure and semiconductor device according to the present disclosure are not limited to the above-described embodiments.
- the specific configuration of each part of the junction structure and the semiconductor device of the present disclosure can be changed in various ways.
- the present disclosure includes the embodiments set forth in the Appendix below. Appendix 1.
- a conductive substrate having a conductive portion; a conductive tubular holder and a terminal including a metal pin inserted into the holder; a conductive bonding material that bonds the conductive portion and the holder; and the metal pin includes a straight portion extending along the thickness direction of the conductive portion; the holder has a first through hole extending in the thickness direction and into which the straight portion of the metal pin is inserted;
- the conductive portion has a terminal bonding surface to which the holder is bonded and an opening formed in the terminal bonding surface, The joining structure, wherein an outer peripheral edge of the opening is at least partially inside an outer peripheral edge of the holder when viewed in the thickness direction.
- the holder includes a tubular portion, and an upper end flange portion and a lower end flange portion that are arranged to sandwich the tubular portion in the thickness direction,
- the first through-hole according to appendix 1 wherein the first through-hole extends over the tubular portion, the upper end flange portion, and the lower end flange portion in the thickness direction, and the lower end flange portion is joined to the conductive portion. junction structure.
- Appendix 3 The joining structure according to appendix 2, wherein the outer peripheral edge of the holder is the outer peripheral edge of the lower end flange when viewed in the thickness direction.
- Appendix 4. The joining structure according to appendix 3, wherein the entire outer peripheral edge of the opening overlaps the lower end flange when viewed in the thickness direction.
- Appendix 5. The joining structure according to any one of Appendixes 2 to 4, wherein each of the cylindrical portion and the first through hole is circular when viewed in the thickness direction.
- Appendix 6. The conductive bonding material includes an inflow portion formed in the first through hole, The joining structure according to Appendix 5, wherein the inflow portion is connected in the thickness direction from a side of the holder on which the conductive portion is located.
- Appendix 7. The joint structure according to appendix 6, wherein a ratio of the dimension of the inflow portion in the thickness direction to the diameter of the first through hole is 10% or more and 65% or less. Appendix 8. 7.
- the conductive portion includes a second through hole connected to the opening,
- the conductive substrate includes an insulating layer;
- the conductive portion is laminated on one side of the insulating layer in the thickness direction,
- the insulating layer includes an exposed portion that overlaps the second through hole when viewed in the thickness direction,
- the bonding structure according to Appendix 9 wherein at least part of the exposed portion does not come into contact with the conductive bonding material.
- Appendix 11. 9. The joining structure according to any one of Appendices 1 to 8, wherein the conductive portion includes a depression connected to the opening.
- Appendix 13 a joint structure according to any one of appendices 1 to 12; and a semiconductor element electrically connected to the terminal.
- Appendix 14 14. The semiconductor device according to appendix 13, wherein the terminal is a control terminal for controlling the semiconductor element. Appendix 15. further comprising a first power terminal and a second power terminal each electrically connected to the semiconductor element; a first power supply voltage is input to the first power supply terminal; 15. The semiconductor device according to appendix 14, wherein the second power supply terminal receives a second power supply voltage. Appendix 16.
- the semiconductor element includes a first semiconductor element bonded to the first conductor and a second semiconductor element bonded to the second conductor
- the conductive substrate includes a first conductive substrate bonded to the first conductor and a second conductive substrate bonded to the second conductor
- the conductive portion includes a first conductive portion possessed by the first conductive substrate and a second conductive portion possessed by the second conductive substrate
- the first power supply terminal includes a first input terminal connected to the first conductor and a second input terminal connected to the second semiconductor element
- the second power terminal is an output terminal connected to the second conductor
- the control terminal is joined to the first conductive portion and controls the first semiconductor element
- the second control terminal is joined to the second conductive portion and controls the second semiconductor element.
- each of the first semiconductor element and the second semiconductor element is a switching element that performs a switching operation;
- the first control terminal includes a first drive terminal for controlling the switching operation of the first semiconductor element and a first detection terminal for detecting the conduction state of the first semiconductor element;
- Appendix 16 wherein the second control terminal includes a second drive terminal for controlling the switching operation of the second semiconductor element, and a second detection terminal for detecting the conduction state of the second semiconductor element.
- Appendix 18 a resin member covering part of each of the first control terminal and the second control terminal, the first conductive substrate and the second conductive substrate, and the first semiconductor element and the second semiconductor element; 18.
- the semiconductor device according to Appendix 16 or 17, wherein each of the first control terminal and the second control terminal protrudes through the resin member in the thickness direction.
- Appendix 19 The resin member has a resin main surface and a resin back surface separated in the thickness direction, and a resin side surface sandwiched between the resin main surface and the resin back surface in the thickness direction, The resin side surface faces the first direction, 19.
- the semiconductor device according to appendix 18, wherein the first power terminal and the second power terminal protrude in the first direction from the resin side surface.
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Abstract
Description
付記1.
導電部を有する導電基板と、
導電性を有する筒状のホルダ、および、前記ホルダに挿入された金属ピンを含む端子と、
前記導電部と前記ホルダとを接合する導電性接合材と、
を備えており、
前記金属ピンは、前記導電部の厚さ方向に沿って延びる直状部を含み、
前記ホルダは、前記厚さ方向に延び、且つ、前記金属ピンの前記直状部が挿入される第1貫通孔を有し、
前記導電部は、前記ホルダが接合される端子接合面と、前記端子接合面に形成された開口部とを有し、
前記厚さ方向に見て、前記開口部の外周縁は、少なくとも一部が前記ホルダの外周縁の内方にある、接合構造。
付記2.
前記ホルダは、筒状部と、前記厚さ方向に前記筒状部を挟んで配置される上端鍔部および下端鍔部を含み、
前記第1貫通孔は、前記厚さ方向に、前記筒状部、前記上端鍔部および前記下端鍔部に跨っており
前記下端鍔部が、前記導電部に接合される、付記1に記載の接合構造。
付記3.
前記厚さ方向に見て、前記ホルダの前記外周縁は、前記下端鍔部の外周縁である、付記2に記載の接合構造。
付記4.
前記厚さ方向に見て、前記開口部の前記外周縁のすべては、前記下端鍔部に重なる、付記3に記載の接合構造。
付記5.
前記筒状部および前記第1貫通孔の各々は、前記厚さ方向に見て円形である、付記2ないし付記4のいずれかに記載の接合構造。
付記6.
前記導電性接合材は、前記第1貫通孔に形成された流入部を含み、
前記流入部は、前記ホルダのうち、前記導電部が位置する側から前記厚さ方向に繋がる、付記5に記載の接合構造。
付記7.
前記第1貫通孔の直径に対する前記流入部の前記厚さ方向の寸法の割合は、10%以上65%以下である、付記6に記載の接合構造。
付記8.
前記厚さ方向に見て、前記導電性接合材の外周縁は、前記ホルダの前記外周縁よりも外方にある、付記1ないし付記7のいずれかに記載の接合構造。
付記9.
前記導電部は、前記開口部に繋がる第2貫通孔を含み、
前記導電性接合材は、前記第2貫通孔の内面に接する、付記1ないし付記8のいずれかに記載の接合構造。
付記10.
前記導電基板は、絶縁層を含み、
前記導電部は、前記絶縁層の前記厚さ方向の一方側に積層されており、
前記絶縁層は、前記厚さ方向に見て前記第2貫通孔に重なる露出部を含み、
前記露出部の少なくとも一部は、前記導電性接合材に接しない、付記9に記載の接合構造。
付記11.
前記導電部は、前記開口部に繋がる窪みを含む、付記1ないし付記8のいずれかに記載の接合構造。
付記12.
前記導電性接合材は、前記窪みに形成された充填部を含む、付記11に記載の接合構造。
付記13.
付記1ないし付記12のいずれかに記載の接合構造と、
前記端子に電気的に接続された半導体素子と、を備える半導体装置。
付記14.
前記端子は、前記半導体素子を制御するための制御端子である、付記13に記載の半導体装置。
付記15.
各々が前記半導体素子に電気的に接続された第1電源端子および第2電源端子をさらに備え、
前記第1電源端子は、第1電源電圧が入力され、
前記第2電源端子は、第2電源電圧が入力される、付記14に記載の半導体装置。
付記16.
前記厚さ方向に直交する第1方向において、互いに離間する第1導電体および第2導電体をさらに備え、
前記半導体素子は、前記第1導電体に接合された第1半導体素子と、前記第2導電体に接合された第2半導体素子とを含み、
前記導電基板は、前記第1導電体に接合された第1導電基板と、前記第2導電体に接合された第2導電基板とを含み、
前記導電部は、前記第1導電基板が有する第1導電部と、前記第2導電基板が有する第2導電部とを含み、
前記第1電源端子は、前記第1導電体に繋がる第1入力端子と、前記第2半導体素子に繋がる第2入力端子とを含み、
前記第2電源端子は、前記第2導電体に繋がる出力端子であり、
前記制御端子は、前記第1導電部に接合され、且つ、前記第1半導体素子を制御する第1制御端子と、前記第2導電部に接合され、且つ、前記第2半導体素子を制御する第2制御端子とを含む、付記15に記載の半導体装置。
付記17.
前記第1半導体素子および前記第2半導体素子の各々は、スイッチング動作を行うスイッチング素子であり、
前記第1制御端子は、前記第1半導体素子の前記スイッチング動作を制御するための第1駆動端子と、前記第1半導体素子の導通状態を検出するための第1検出端子とを含み、
前記第2制御端子は、前記第2半導体素子の前記スイッチング動作を制御するための第2駆動端子と、前記第2半導体素子の導通状態を検出するための第2検出端子とを含む、付記16に記載の半導体装置。
付記18.
前記第1制御端子および前記第2制御端子の一部ずつと、前記第1導電基板および前記第2導電基板と、前記第1半導体素子および前記第2半導体素子とを覆う樹脂部材をさらに備え、
前記第1制御端子および前記第2制御端子の各々は、前記樹脂部材を前記厚さ方向に突出する、付記16または付記17に記載の半導体装置。
付記19.
前記樹脂部材は、前記厚さ方向に離間する樹脂主面および樹脂裏面と、前記厚さ方向において前記樹脂主面および前記樹脂裏面に挟まれた樹脂側面とを有し、
前記樹脂側面は、前記第1方向を向き、
前記第1電源端子および前記第2電源端子は、前記樹脂側面から前記第1方向に突出する、付記18に記載の半導体装置。
1A:第1半導体素子 1B:第2半導体素子
10a:素子主面 10b:素子裏面
11:第1主面電極 12:第2主面電極
13:第3主面電極 15:裏面電極
Q1:スイッチング機能部 D1:ダイオード機能部
D2:ダイオード 2:支持基板 21:絶縁層
21a:主面 21b:裏面 22:主面金属層
22A:第1支持部 22B:第2支持部
221:接合層 23:裏面金属層 24A:第1導電体
24B:第2導電体 240a:凹部 241:基材
242:主面接合層 243:裏面接合層
25A,25B:導電性接合材 251:基層
252:上層 253:下層 31:第1電源端子
31A:入力端子 31B:入力端子 32:第2電源端子
32A:出力端子 33:制御端子 331:ホルダ
331a:筒状部 331b:上端鍔部 331c:下端鍔部
331d:外周縁 332:貫通孔 333:金属ピン
333a:直状部 34:第1制御端子 34A:第1駆動端子
34B,34C,34D:第1検出端子 35:第2制御端子
35A:第2駆動端子 35B,35C:第2検出端子
4:導電基板 4A:第1導電基板 4B:第2導電基板
41:絶縁層 41a:主面 41b:裏面
410:露出部 42:主面金属層 420a :端子接合面
420b:開口部 420c:貫通孔 420d:窪み
421,422,423,424:導電部
43:裏面金属層 49:接合材 5:導通部材
51:第1導通部材 52:第2導通部材 521:第1配線部
522:第2配線部 522a:凹部領域 523:第3配線部
523a:凸状領域 524:第4配線部 53:開口
591,592,593:導電性接合材
61,61A,61B:導電性接合材 611:基層
612:上層 613:下層
63,63A,63B:導電性接合材 630:空隙
631:流入部 632:充填部
651:ワイヤ 651A:第1ワイヤ 651B:第2ワイヤ
652:ワイヤ 652A:第1ワイヤ 652B:第2ワイヤ
653:ワイヤ 653A:第1ワイヤ 653B:第2ワイヤ
654:ワイヤ 654B:第2ワイヤ 7:樹脂部材
71:樹脂主面 72:樹脂裏面 731~734:樹脂側面
732a:凹部 751:第1突出部 751a:第1突出端面
752:第2突出部 76:樹脂空隙部 77:樹脂部
78:樹脂充填部
Claims (19)
- 導電部を有する導電基板と、
導電性を有する筒状のホルダ、および、前記ホルダに挿入された金属ピンを含む端子と、
前記導電部と前記ホルダとを接合する導電性接合材と、
を備えており、
前記金属ピンは、前記導電部の厚さ方向に沿って延びる直状部を含み、
前記ホルダは、前記厚さ方向に延び、且つ、前記金属ピンの前記直状部が挿入される第1貫通孔を有し、
前記導電部は、前記ホルダが接合される端子接合面と、前記端子接合面に形成された開口部とを有し、
前記厚さ方向に見て、前記開口部の外周縁は、少なくとも一部が前記ホルダの外周縁の内方にある、接合構造。 - 前記ホルダは、筒状部と、前記厚さ方向に前記筒状部を挟んで配置される上端鍔部および下端鍔部を含み、
前記第1貫通孔は、前記厚さ方向に、前記筒状部、前記上端鍔部および前記下端鍔部に跨っており
前記下端鍔部が、前記導電部に接合される、請求項1に記載の接合構造。 - 前記厚さ方向に見て、前記ホルダの前記外周縁は、前記下端鍔部の外周縁である、請求項2に記載の接合構造。
- 前記厚さ方向に見て、前記開口部の前記外周縁のすべては、前記下端鍔部に重なる、請求項3に記載の接合構造。
- 前記筒状部および前記第1貫通孔の各々は、前記厚さ方向に見て円形である、請求項2ないし請求項4のいずれか一項に記載の接合構造。
- 前記導電性接合材は、前記第1貫通孔に形成された流入部を含み、
前記流入部は、前記ホルダのうち、前記導電部が位置する側から前記厚さ方向に繋がる、請求項5に記載の接合構造。 - 前記第1貫通孔の直径に対する前記流入部の前記厚さ方向の寸法の割合は、10%以上65%以下である、請求項6に記載の接合構造。
- 前記厚さ方向に見て、前記導電性接合材の外周縁は、前記ホルダの前記外周縁よりも外方にある、請求項1ないし請求項7のいずれか一項に記載の接合構造。
- 前記導電部は、前記開口部に繋がる第2貫通孔を含み、
前記導電性接合材は、前記第2貫通孔の内面に接する、請求項1ないし請求項8のいずれか一項に記載の接合構造。 - 前記導電基板は、絶縁層を含み、
前記導電部は、前記絶縁層の前記厚さ方向の一方側に積層されており、
前記絶縁層は、前記厚さ方向に見て前記第2貫通孔に重なる露出部を含み、
前記露出部の少なくとも一部は、前記導電性接合材に接しない、請求項9に記載の接合構造。 - 前記導電部は、前記開口部に繋がる窪みを含む、請求項1ないし請求項8のいずれか一項に記載の接合構造。
- 前記導電性接合材は、前記窪みに形成された充填部を含む、請求項11に記載の接合構造。
- 請求項1ないし請求項12のいずれか一項に記載の接合構造と、
前記端子に電気的に接続された半導体素子と、
を備える半導体装置。 - 前記端子は、前記半導体素子を制御するための制御端子である、請求項13に記載の半導体装置。
- 各々が前記半導体素子に電気的に接続された第1電源端子および第2電源端子をさらに備え、
前記第1電源端子は、第1電源電圧が入力され、
前記第2電源端子は、第2電源電圧が入力される、請求項14に記載の半導体装置。 - 前記厚さ方向に直交する第1方向において、互いに離間する第1導電体および第2導電体をさらに備え、
前記半導体素子は、前記第1導電体に接合された第1半導体素子と、前記第2導電体に接合された第2半導体素子とを含み、
前記導電基板は、前記第1導電体に接合された第1導電基板と、前記第2導電体に接合された第2導電基板とを含み、
前記導電部は、前記第1導電基板が有する第1導電部と、前記第2導電基板が有する第2導電部とを含み、
前記第1電源端子は、前記第1導電体に繋がる第1入力端子と、前記第2半導体素子に繋がる第2入力端子とを含み、
前記第2電源端子は、前記第2導電体に繋がる出力端子であり、
前記制御端子は、前記第1導電部に接合され、且つ、前記第1半導体素子を制御する第1制御端子と、前記第2導電部に接合され、且つ、前記第2半導体素子を制御する第2制御端子とを含む、請求項15に記載の半導体装置。 - 前記第1半導体素子および前記第2半導体素子の各々は、スイッチング動作を行うスイッチング素子であり、
前記第1制御端子は、前記第1半導体素子のスイッチング動作を制御するための第1駆動端子と、前記第1半導体素子の導通状態を検出するための第1検出端子とを含み、
前記第2制御端子は、前記第2半導体素子のスイッチング動作を制御するための第2駆動端子と、前記第2半導体素子の導通状態を検出するための第2検出端子とを含む、請求項16に記載の半導体装置。 - 前記第1制御端子および前記第2制御端子の一部ずつと、前記第1導電基板および前記第2導電基板と、前記第1半導体素子および前記第2半導体素子とを覆う樹脂部材をさらに備え、
前記第1制御端子および前記第2制御端子の各々は、前記樹脂部材を前記厚さ方向に突出する、請求項16または請求項17に記載の半導体装置。 - 前記樹脂部材は、前記厚さ方向に離間する樹脂主面および樹脂裏面と、前記厚さ方向において前記樹脂主面および前記樹脂裏面に挟まれた樹脂側面とを有し、
前記樹脂側面は、前記第1方向を向き、
前記第1電源端子および前記第2電源端子は、前記樹脂側面から前記第1方向に突出する、請求項18に記載の半導体装置。
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WO2018168924A1 (ja) * | 2017-03-14 | 2018-09-20 | ローム株式会社 | 半導体装置 |
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JP2017011221A (ja) * | 2015-06-25 | 2017-01-12 | 富士電機株式会社 | 半導体装置 |
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