WO2012039116A1 - 回路装置 - Google Patents
回路装置 Download PDFInfo
- Publication number
- WO2012039116A1 WO2012039116A1 PCT/JP2011/005211 JP2011005211W WO2012039116A1 WO 2012039116 A1 WO2012039116 A1 WO 2012039116A1 JP 2011005211 W JP2011005211 W JP 2011005211W WO 2012039116 A1 WO2012039116 A1 WO 2012039116A1
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- WO
- WIPO (PCT)
- Prior art keywords
- circuit board
- transistor
- circuit
- substrate
- circuit device
- Prior art date
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- 239000000919 ceramic Substances 0.000 claims abstract description 75
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- 229910052782 aluminium Inorganic materials 0.000 description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 12
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
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- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 2
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- 238000001746 injection moulding Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
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- H—ELECTRICITY
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- H05K1/00—Printed circuits
- H05K1/18—Printed circuits structurally associated with non-printed electric components
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- H01L23/043—Containers; Seals characterised by the shape of the container or parts, e.g. caps, walls the container being a hollow construction and having a conductive base as a mounting as well as a lead for the semiconductor body
- H01L23/049—Containers; Seals characterised by the shape of the container or parts, e.g. caps, walls the container being a hollow construction and having a conductive base as a mounting as well as a lead for the semiconductor body the other leads being perpendicular to the base
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Definitions
- the present invention relates to a circuit device, and more particularly to a circuit device in which a power semiconductor element that performs switching of a large current is mounted on an upper surface of a circuit board.
- a conductive pattern 103 is formed on the surface of a rectangular substrate 101 via an insulating layer 102, and circuit elements are fixed to the conductive pattern 103 to form a predetermined electric circuit.
- a semiconductor element 105A is fixed as a circuit element.
- the electrode formed on the upper surface of the semiconductor element 105 ⁇ / b> A is connected to the desired conductive pattern 103 through the fine metal wire 114.
- the lead 104 is connected to a pad 109 made of a conductive pattern 103 formed in the peripheral portion of the substrate 101, and functions as an external terminal.
- the sealing resin 108 has a function of sealing an electric circuit formed on the surface of the substrate 101.
- the case material 111 has a substantially frame shape and is in contact with the side surface of the substrate 101, thereby forming a space for filling the sealing resin 108 on the upper surface of the substrate 101.
- the manufacturing method of the hybrid integrated circuit device 100 having the above-described configuration is as follows. First, a conductive pattern 103 having a predetermined shape is formed on the upper surface of the substrate 101 whose upper surface is covered with an insulating layer 102 made of resin. Next, a circuit element such as the semiconductor element 105A is placed on the upper surface of the substrate 101, and the predetermined conductive pattern 103 and the semiconductor element 105A are electrically connected. Further, the lead 104 is fixed to the conductive pattern 103 formed in a pad shape.
- the case material 111 is attached, and a liquid or semi-solid sealing resin 108 is injected into a space surrounded by the case material 111 and then heat-cured, whereby the semiconductor element 105A and the fine metal wires 114 are resin-sealed. .
- the upper surface of the substrate 101 is covered with an insulating layer 102 having a thickness of about 100 ⁇ m, and the insulating layer 102 is made of an epoxy resin mixed with a filler made of alumina or the like. That is, the conductive pattern 103 connected to the circuit element such as the semiconductor element 105A and the substrate 101 made of metal such as aluminum are insulated from each other by the insulating layer 102.
- the epoxy resin which is the main material of the insulating layer 102, has a low dielectric strength
- a high voltage of about several hundred [V] to several thousand [V] is applied to the conductive pattern 103, the insulating layer 102 breaks down. This causes a problem that the conductive pattern 103 and the substrate 101 are short-circuited.
- the insulating layer 102 is thickened to solve this problem, the withstand voltage is ensured, but the thermal resistance of the insulating layer 102 is increased. The problem of not being released to the outside occurs.
- the present invention has been made in view of the above-described problems, and a main object of the present invention is to provide a circuit device in which heat dissipation and pressure resistance are compatible at a high level.
- the present invention includes a circuit board made of metal, an island made of a metal film provided on the upper surface of the circuit board, a fixed board made of ceramic fixed to the island through a fixing material, and an upper surface of the fixed board And a semiconductor element mounted on the board.
- a fixed substrate made of ceramic is placed on the upper surface of a circuit substrate made of metal such as aluminum, and a semiconductor element such as a power transistor is mounted on the upper surface of the fixed substrate.
- the circuit board and the semiconductor element are insulated from each other by a ceramic made of an inorganic material and having a high withstand voltage. Therefore, even if a high voltage of about several thousand [V] is applied to the semiconductor element, a short circuit between the circuit board and the semiconductor element is prevented.
- FIG. 1A and 1B are diagrams showing a circuit device of the present invention, in which FIG. 1A is a cross-sectional view, and FIG. 1B is an enlarged cross-sectional view showing a place where a circuit element is mounted.
- 2A and 2B are diagrams showing a circuit device of the present invention, in which FIG. 2A is a plan view and FIG. 2B is a cross-sectional view.
- 3A and 3B are enlarged plan views showing the circuit device of the present invention.
- 4A is a circuit diagram showing a solar power generation system in which the hybrid integrated circuit device of the present invention is incorporated, and FIG. 4B is a circuit diagram partially enlarged.
- 5A and 5B are views showing a method for manufacturing a circuit device according to the present invention.
- FIG. 1A is a cross-sectional view
- FIG. 1B is an enlarged cross-sectional view showing a place where a circuit element is mounted.
- 2A and 2B are diagrams showing a circuit device of
- FIG. 5A is a plan view
- FIG. 5B is a sectional view
- FIG. 5C is an enlarged sectional view
- 6A and 6B are diagrams showing a method for manufacturing a circuit device according to the present invention, in which FIG. 6A is a plan view, FIG. 6B is a sectional view, and FIG. 6C is an enlarged sectional view.
- FIG. 7 is a view showing a method of manufacturing a circuit device of the present invention, and (A)-(C) are sectional views.
- FIG. 8 is a sectional view showing a circuit device of the background art.
- the structure of the hybrid integrated circuit device 10 will be described with reference to FIGS. 1 to 3 as an example of a circuit device.
- a hybrid integrated circuit device 10 is a circuit device in which a hybrid integrated circuit composed of a plurality of circuit elements is incorporated on the upper surface of a circuit board 12.
- a ceramic substrate 22 is placed on the upper surface of a circuit board 12 made of metal, and a transistor 34 and a diode 36 (semiconductor element) are placed on the upper surface of the ceramic substrate 22 (fixed substrate).
- a frame-shaped case material 14 is placed on the upper surface of the circuit board 12, and a sealing resin 16 is filled in a space surrounded by the case material 14.
- a substrate 42 provided with signal leads 44 is disposed above the circuit substrate 12.
- an output lead 28 or the like is integrally embedded in the case material 14, and a semiconductor element such as a transistor 34 is electrically connected to the output lead 28 via a thin metal wire 26.
- the circuit board 12 is a circuit board whose main material is aluminum (Al), copper (Cu), or the like.
- the thickness of the circuit substrate 12 is, for example, about 0.5 mm to 2.0 mm in order to improve heat dissipation.
- Anodized films are formed on both main surfaces of the circuit board 12, and the upper surface of the circuit board 12 is covered with an insulating layer 50.
- the ceramic substrate 22 is made of an inorganic solid material such as Al 2 0 3 (alumina) or AlN (aluminum nitride), and has a thickness of, for example, 0.25 mm to 1.0 mm.
- the ceramic substrate 22 is for insulating the transistor 34 mounted on the upper surface from the circuit board 12. A structure in which the ceramic substrate 22 is fixed to the circuit board 12 will be described later with reference to FIG. Further, heat generated during operation of the transistor 34 and the diode 36 is released to the outside through the ceramic substrate 22 and the circuit substrate 12.
- the case material 14 is obtained by injection molding a resin material such as an epoxy resin into a frame shape. Further, the case material 14 is fixed to the upper surface of the peripheral portion of the circuit board 12, so that a space for resin-sealing circuit elements such as the transistors 34 is provided on the upper surface of the circuit board 12.
- an output lead 28 through which a large current output signal switched by the transistor 34 passes is integrally incorporated in the case material 14.
- Such a structure is realized by injection molding the resin material of the case material 14 together with the output lead 28.
- an L-shaped wiring lead 40 is disposed inside the case material 14, and the wiring lead 40 is connected to the control electrode of the transistor 34 via the fine metal wire 26.
- the plurality of output leads 28 incorporated in the case material 14 are arranged on the same plane.
- the vicinity of the upper end of the wiring lead 40 is fixed by being inserted into the through hole of the substrate 42. That is, circuit elements such as the transistor 34 disposed on the upper surface of the circuit board 12 are electrically connected to the board 42 via the wiring leads 40.
- a plurality of signal leads 44 are arranged on the substrate 42, and the signal leads 44 function as external connection terminals.
- the substrate 42 has a conductive pattern formed on the main surface of a glass epoxy substrate having a thickness of about 1 mm, for example.
- the sealing resin 16 is made of a resin material such as epoxy filled with a filler such as alumina, and is filled in the space on the upper surface of the circuit board 12 surrounded by the case material 14.
- the sealing resin 16 seals the ceramic substrate 22, the transistor 34, the diode 36, the metal thin wire 26, the substrate 42, and the like.
- the circuit board 12 is a circuit board made of aluminum
- the upper and lower surfaces of the circuit board 12 are covered with oxide films 46 and 48 made of alumite formed by anodic oxidation.
- the upper surface of the circuit board 12 is covered with the thin insulating layer 50 as described above.
- the insulating layer 50 may be omitted, and the island 18 may be formed directly on the upper surface of the oxide film 46 covering the upper surface of the circuit board 12. This further improves heat dissipation.
- An island 18 is formed on the upper surface of the insulating layer 50 covering the circuit board 12 by etching a metal film such as copper having a thickness of about 50 ⁇ m into a predetermined shape. This island 18 is not used as a wiring through which an electric signal passes. In this embodiment, the island 18 is used to improve the wettability of the fixing material 38 used for fixing the ceramic substrate 22.
- the lower surface of the ceramic substrate 22 is covered with a metal film 20 having a thickness of about 250 ⁇ m.
- the metal film 20 is formed in a solid state over the entire lower surface of the ceramic substrate 22.
- a conductive pattern 24 is formed by etching a metal film having a thickness of about 250 ⁇ m into a predetermined shape.
- a transistor 34 and a diode 36 are mounted on the conductive pattern 24 via a conductive fixing material such as solder.
- the conductive pattern 24 constitutes an island on which circuit elements such as the transistor 34 are mounted, a wiring portion for connecting the elements, a pad for bonding a thin metal wire, and the like.
- MOSFET MOSFET, IGBT, or bipolar transistor
- the transistor 34 for example, a power transistor that performs switching of a large current having a current value of 1 ampere or more is employed.
- the electrode provided on the lower surface of the transistor 34 is connected to the conductive pattern 24 via a conductive fixing material such as solder.
- the electrode provided on the upper surface is connected to the transistor 34 via the fine metal wire 26, and the electrode on the lower surface is connected to the conductive pattern 24 via a conductive adhesive such as solder.
- the transistor 34 is an IGBT
- the emitter electrode provided on the upper surface of the transistor 34 is connected to the anode electrode provided on the upper surface of the diode via the thin metal wire 26.
- the collector electrode provided on the lower surface of the transistor 34 is connected to the cathode electrode provided on the lower surface of the diode via the conductive pattern 24. Details of this connection structure will be described later with reference to a circuit diagram shown in FIG.
- the fine metal wire 26 used for electrical connection of the above-described transistor or the like is made of aluminum having a diameter of about 200 ⁇ m, for example.
- ribbon bonding in which a metal foil such as aluminum is formed in a ribbon shape may be employed.
- an insulating layer 50 made of resin is provided on the upper surface of the circuit board 12.
- the thickness of the insulating layer 50 is, for example, 60 ⁇ m (50 ⁇ m or more and 70 ⁇ m or less).
- the material of the insulating layer 50 is the same as that of the background art, and a resin material such as an epoxy resin is highly filled with a filler such as alumina.
- the purpose of covering the upper surface of the circuit board 12 with the insulating layer 50 is to facilitate the formation of the island 18. That is, it is possible to form the island 18 made of copper directly on the upper surface of the oxide film 46 covering the upper surface of the circuit board 12, but in this case, the adhesion strength between the circuit board 12 and the island 18 is weakened. . For this reason, in this embodiment, the adhesion strength between the island 18 and the circuit board 12 is improved by interposing the insulating layer 50 made of an organic material between the circuit board 12 and the island 18.
- the withstand voltage of the thin insulating layer 50 is lower than that of the background art.
- the insulating layer 50 does not require a high breakdown voltage in this embodiment.
- the thermal conductivity of the thin insulating layer 50 of this embodiment is 4 W / mK or more, which is 4 times or more compared with the thermal conductivity of the insulating layer 102 which is about 200 ⁇ m thick in the background art. Therefore, the heat generated from the transistor 34 can be discharged to the outside through the insulating layer 50.
- FIG. 2A is a plan view showing the hybrid integrated circuit device 10
- FIG. 2B is a sectional view thereof.
- a plurality of ceramic substrates are arranged on the upper surface of the circuit board 12. Specifically, seven ceramic substrates 22A-22G are fixed to the upper surface of the circuit substrate 12, and predetermined circuit elements are mounted on the upper surfaces of the respective ceramic substrates 22A-22G.
- Transistors such as IGBTs and diodes are mounted on the top surfaces of the ceramic substrates 22A-22D.
- a transistor is mounted on the ceramic substrate 22F, a diode is mounted on the ceramic substrate 22E, and a resistor is mounted on the ceramic substrate 22G. This resistor is for detecting the value of the current flowing through the output lead 33.
- the output lead 28 is a lead for connecting the transistors to each other inside the case material 14.
- the output leads 30 and 33 are leads for supplying DC power from the outside.
- the output leads 29, 31, and 32 are leads for outputting the AC power converted by the built-in inverter. Furthermore, the hole exposed for screwing for a connection is provided in the part exposed to the exterior of each output lead.
- wiring leads 40 are fixed to the step portions provided near the left and right ends of the case material 14.
- the role of the case material 14 of this embodiment is not only to secure an internal space for filling the sealing resin 16 above the circuit board 12.
- the case material 14 of this embodiment has a role of fixing an output lead through which a high voltage current passes at a predetermined position. Furthermore, it also has a role of insulating the output lead from the circuit board 12.
- circuit elements such as transistors mounted on the upper surfaces of the ceramic substrates 22B and 22F are connected to the output leads 30 and 28 via fine metal wires. Furthermore, the electrode provided on the upper surface of the transistor 34 is connected to the wiring lead 40 via the fine metal wire 26.
- each element is electrically connected by the output leads 28 and 30 embedded in the case material 14, the wiring lead 40 and the fine metal wire 26.
- the insulating property is enhanced by eliminating the high-voltage insulating layer made of resin that covers the upper surface of the substrate in the background art.
- the output leads 28 and 30 are insulated from the circuit board 12 by the case material 14. However, since the case material 14 covering the lower surfaces of the output leads 28 and 30 has a thickness of 1.0 mm or more, a sufficient withstand voltage is obtained. Sex is obtained.
- FIG. 3A and FIG. 3B are plan views showing an enlarged part of the circuit board 12.
- the conductive pattern formed on the upper surface of the ceramic substrate is indicated by a hatched area.
- ceramic substrates 22F and 22E are adjacent to each other on the upper surface of circuit board 12 with a predetermined distance therebetween.
- the elements mounted on the ceramic substrates 22F and 22E constitute a converter circuit shown in FIG.
- the two transistors Q1 are fixed to the conductive pattern disposed on the upper surface of the ceramic substrate 22F via a conductive bonding material such as solder.
- a conductive bonding material such as solder.
- an IGBT or a MOSFET is employed as the transistor Q1.
- the collector electrode on the lower surface of the transistor is connected via a conductive pattern formed on the upper surface of the ceramic substrate 22F.
- the emitter electrodes formed on the upper surfaces of the two transistors Q1 are connected to the output lead 28 via a plurality of fine metal wires 26.
- the gate electrode provided on the upper surface of the transistor Q1 is connected to the wiring lead 40 embedded in the case material 14 via the thin metal wire 26.
- a plurality of diodes D1 are mounted on the conductive pattern formed on the upper surface of the ceramic substrate 22E via a conductive bonding material such as solder.
- the anode electrode formed on the upper surface of the diode D1 is connected to the collector electrode of the transistor Q1 via the thin metal wire 26 and the conductive pattern of the ceramic substrate 22F.
- the cathode electrode formed on the lower surface of the diode D1 is connected to the output lead 30 via the conductive pattern of the ceramic substrate 22E and the thin metal wire 26.
- transistors and diodes constituting an inverter are mounted on the upper surfaces of the ceramic substrates 22A and 22B.
- two transistors Q2 and four diodes D2 are connected to the upper surface of the ceramic substrate 22A in the same conductive pattern via solder.
- the collector electrode provided on the lower surface of the transistor Q2 and the cathode electrode provided on the lower surface of the diode D3 are electrically connected.
- the gate electrode arranged on the upper surface of the transistor Q2 is connected to the wiring lead 40 of the case material 14 via the conductive pattern of the ceramic substrate 22A and the thin metal wire 26.
- the emitter electrode arranged on the upper surface of the transistor Q2 is connected to the anode electrode provided on the upper surface of the diode D3 via the fine metal wire 26, and further connected to the conductive pattern of the ceramic substrate 22B.
- the electrodes provided on the upper surfaces of the transistor Q2 and the diode D3 mounted on the ceramic substrate 22A are connected to the electrodes provided on the lower surfaces of the transistor Q3 and the diode D3 mounted on the adjacent ceramic substrate 22B.
- an element mounting pattern and a plurality of connection patterns for connecting the metal thin wires to each other are provided on the upper surface of the ceramic substrate 22A.
- the same conductive pattern is formed on the ceramic substrates 22A-22D on which the elements constituting the inverter circuit are mounted.
- the ceramic substrate 22E is not a substrate on which inverter elements are mounted, but a substrate having the same pattern shape as the ceramic substrates 22A-22D is employed.
- the types of pattern shapes of the ceramic substrate are reduced, and the manufacturing cost can be reduced.
- the configuration of the conductive pattern provided on the ceramic substrate 22B and the mounted elements are the same as those of the ceramic substrate 22A. That is, the back electrodes of the two transistors Q3 and the four diodes D3 are connected to the upper surface of one conductive pattern via solder. The emitter electrode of the transistor Q3 and the anode electrode of the diode D3 are connected to the output lead 28 via the thin metal wire 26. Furthermore, the gate electrode which is the control electrode of the transistor Q3 is connected to the wiring lead 40 via the conductive pattern and the fine metal wire on the ceramic substrate 22B. The conductive pattern on which the transistor Q3 and the like are mounted is connected to the output lead 29 via a plurality of fine metal wires 26.
- the pattern shapes, mounted elements, and connection structure of the ceramic substrates 22C and 22D shown in FIG. 2A are the same as those of the ceramic substrates 22A and 22B described above. That is, two transistors and four diodes are connected to the upper surfaces of the ceramic substrates 22C and 22D.
- the element placed on the upper surface of the ceramic substrate 22C and the element placed on the ceramic substrate 22D are connected via a fine metal wire.
- the elements mounted on the upper surfaces of the ceramic substrates 22C and 22D are electrically connected to the output leads and the wiring leads via the fine metal wires.
- FIG. 4A is a circuit diagram showing the overall solar battery power generation system
- FIG. 4B is a circuit diagram showing the transistor Q3 included in this system in detail.
- the power generation system shown in this figure includes a solar cell 70, a solar cell opening / closing unit 72, a boost chopper 74, an inverter 76, and relays 78 and 80.
- the electric power generated by the power generation device having such a configuration is supplied to the power system 82 and the load 84 for autonomous operation.
- the hybrid integrated circuit device 10 of this embodiment incorporates a converter 86 and an inverter 76 that are part of the boost chopper 74.
- the solar cell 70 is a converter that converts irradiated light into electric power and outputs the electric power, and outputs DC electric power.
- a plurality of solar cells 70 may be employed in series.
- the solar cell opening / closing unit 72 has a function of collecting the electricity generated by the solar cell 70 to prevent backflow and supplying a direct current to the boost chopper 74.
- the step-up chopper 74 has a function of boosting the voltage of the DC power supplied from the solar cell 70.
- the transistor Q1 which is a MOSFET, periodically repeats the ON operation and the OFF operation, thereby boosting the DC power of about 250V generated by the solar cell 70 to DC power of about 370V.
- the boost chopper 74 includes a coil L1 connected in series to the output terminal of the solar cell, and a transistor Q1 connected between the coil L1 and the ground terminal. The DC power boosted by the coil L1 is supplied to the inverter 76 at the next stage via the diode D1 for the backflow element and the smoothing capacitor C1.
- the transistor Q1 and the diode D1 included in the step-up chopper 74 are placed on the upper surfaces of the ceramic substrates 22F and 22E shown in FIG.
- the transistor Q1 is switched based on a control signal supplied from the outside via the signal lead 44 and the wiring lead 40 shown in FIG.
- the DC power boosted by the boost chopper 74 is converted into AC power having a predetermined frequency by the inverter 76.
- the inverter 76 includes two transistors Q2 and Q4 connected in series between the output terminals of the boost chopper 74, and two transistors Q3 and Q5 connected in series in the same manner. The switching of these transistors is controlled by a control signal supplied from the outside, and Q2 and Q3 and Q4 and Q5 are switched complementarily.
- the AC power having a predetermined frequency by these switching is output to the outside from the connection point between Q2 and Q3 and the connection point between Q4 and Q5.
- a two-phase inverter circuit composed of four transistors is constructed.
- the transistors Q2-Q5 constituting the inverter 76 are fixed to the ceramic substrates 22A, 22B, 22C and 22D shown in FIG.
- AC power converted by the inverter 76 is supplied to a commercial power system 82 or a load 84 for autonomous operation.
- a relay 78 is interposed between the electric power system 82 and the inverter 76, and the relay 78 is normally in a normal state. When an abnormality is detected in either one of the relays 78, the relay 78 is cut off. Further, a relay 80 is also interposed between the inverter 76 and the load for autonomous operation, and the power supply is cut off by the relay 80 in an abnormal state.
- the elements included in the boost chopper 74 and the inverter 76 are fixed to the upper surface of the ceramic substrate 22 shown in FIG. Therefore, even if a voltage of several hundred to several thousand volts is applied to these elements without interposing a high-voltage insulating resin material between the elements and the circuit board 12, the elements and the circuit board 12 are short-circuited. do not do.
- a transistor Q3 which is one of the transistors included in the inverter 76, is connected to two transistors IBGTs Q31 and Q32 and 4 connected to the main electrodes of these transistors. It consists of two diodes D31, D32, D33, and D34.
- Transistor Q31 and transistor Q32 are connected in parallel. Specifically, the gate electrode, the emitter electrode, and the collector electrode of the transistor Q31 and the transistor Q32 are connected in common. In this way, a large current capacity can be obtained as compared with the case of one transistor.
- the anode electrodes of the diodes D31, D32, D33, and D34 are connected to the emitter electrodes of the transistor Q31 and the transistor Q32.
- the cathode electrodes of these diodes are connected to the collector electrodes of the transistor Q31 and the transistor Q32.
- FIG. 5A is a plan view showing this step
- FIGS. 5B and 5C are cross-sectional views showing this step.
- the prepared circuit board 12 is a circuit board made of a metal such as aluminum or copper having a thickness of about 1 mm to 3 mm.
- a metal such as aluminum or copper having a thickness of about 1 mm to 3 mm.
- the upper and lower surfaces of the circuit board 12 are covered with an anodized film.
- the upper surface of the circuit board 12 is covered with an insulating layer 50 having a thickness of about 60 ⁇ m or less.
- the circuit board 12 is formed into a predetermined shape by pressing or grinding a large circuit board.
- the islands 18A-18G are formed by etching the copper foil adhered to the upper surface of the circuit board 12 into a predetermined shape.
- the islands 18A-18G are not for mounting circuit elements such as transistors, but for improving the wettability of solder used for mounting a ceramic substrate, which will be described later.
- the upper and lower surfaces of circuit board 12 are covered with oxide films 46 and 48 made of anodized by anodization. . Further, the upper surface of the oxide film 46 is covered with an insulating layer 50 made of a resin material, and an island 18B is formed on the upper surface of the insulating layer 50.
- the island 18B is formed on the upper surface of the insulating layer 50 that covers the upper surface of the circuit board 12. Therefore, although the insulating layer 50 exists between the circuit board 12 and the island 18B, the thermal conductivity of the thin insulating layer 50 is very high, so that the thermal conductivity of the entire board is very high.
- FIG. 6A is a plan view showing this step
- FIGS. 6B and 6C are cross-sectional views.
- ceramic substrates 22A-22G on which predetermined circuit elements such as transistors and diodes are mounted are fixed to the upper surface of circuit substrate 12.
- the ceramic substrates 22A-22G are fixed to the upper surfaces of the islands 18A-18G formed on the upper surface of the circuit substrate 12 in the previous step.
- conductive pattern 24 and metal film 20 are formed on the upper and lower surfaces of ceramic substrate 22. Then, the metal film 20 covering the lower surface of the ceramic substrate 22 is fixed to the island 18 provided on the upper surface of the circuit substrate 12 through a fixing material 38 such as solder. By providing the solid metal film 20 on the entire lower surface of the ceramic substrate 22, the fixing material 38 adheres to the entire lower surface of the ceramic substrate 22. Therefore, the ceramic substrate 22 is firmly bonded to the circuit board 12.
- the case material 14 is bonded to the periphery of the upper surface of the circuit board 12.
- FIG. As described above, output leads and wiring leads are incorporated in the case material 14 in advance.
- the case material 14 is bonded to the upper surface of the circuit board 12 via an adhesive material such as an epoxy resin.
- the circuit element and each lead are electrically connected by a thin metal wire 26.
- the gate electrode of the transistor 34 fixed to the upper surface of the ceramic substrate 22B is connected to the wiring lead 40 via the thin metal wire 26.
- the emitter electrode disposed on the upper surface of the transistor 34 is connected to the output lead 30 together with the anode electrode provided on the upper surface of the diode 36.
- the transistor 34 mounted on the upper surface of the ceramic substrate 22F is connected to the output lead 28 via the fine metal wire 26.
- a thin metal wire made of aluminum having a diameter of about 200 ⁇ m is used to connect the circuit elements.
- ribbon bonding using ribbon-like aluminum foil may be employed instead of wire bonding using fine metal wires.
- each wiring lead 40 is connected to the signal lead 44 provided on the substrate 42 via the conductive pattern formed on the surface of the substrate 42.
- a sealing resin 16 is filled in a space surrounded by the case material 14.
- a silicon resin or an epoxy resin is employed.
- a resin material filled with a filler such as alumina may be adopted as the sealing resin 16.
- the hybrid integrated circuit device 10 shown in FIG. 1 is manufactured through the above steps.
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Abstract
Description
12 回路基板
14 ケース材
16 封止樹脂
18、18A、18B、18C、18D、18E、18F、18G アイランド
20 金属膜
22、22A、22B、22C、22D、22E、22F、22G セラミック基板
24 導電パターン
26 金属細線
28 出力リード
29 出力リード
30 出力リード
31 出力リード
32 出力リード
33 出力リード
34 トランジスタ
36 ダイオード
38 固着材
40 配線リード
42 基板
44 信号リード
46 酸化膜
48 酸化膜
50 絶縁層
70 太陽電池
72 太陽電池開閉部
74 昇圧チョッパ
76 インバータ
78 リレー
80 リレー
82 電力系統
84 自立運転用負荷
86 コンバータ
Q1、Q2、Q3、Q4、Q5、Q31、Q32 トランジスタ
D1、D2、D3、D31、D32、D33、D34 ダイオード
Claims (8)
- 金属から成る回路基板と、
前記回路基板の上面に設けられた金属膜から成るアイランドと、
前記アイランドに固着材を介して固着されたセラミックから成る固着基板と、
前記固着基板の上面に実装された半導体素子と、を備えることを特徴とする回路装置。 - 前記固着基板の下面には金属膜が設けられ、
前記固着材は、前記回路基板の上面に設けられた前記アイランドと、前記固着基板の下面に設けられた前記金属膜に接触することを特徴とする請求項1に記載の回路装置。 - 前記回路基板の上面は樹脂材料から成る絶縁層により被覆され、
前記アイランドは前記絶縁層の上面に形成されることを特徴とする請求項1または請求項2に記載の回路装置。 - 前記回路基板の上面には、複数個の前記固着基板が載置され、
前記固着基板の上面には、トランジスタと前記トランジスタの主電極に接続されたダイオードが実装されることを特徴とする請求項1から請求項3の何れかに記載の回路装置。 - 前記回路基板の周辺部に当接するケース材と、
前記ケース材に組み込まれ、一端が前記ケース材の内部空間に露出すると共に、他端が前記ケース材の外側に配置される複数のリードと、を更に備え、
前記半導体素子の電極は、前記ケース材の前記内部空間に露出する前記リードに接続されることを特徴とする請求項1から請求項4の何れかに記載の回路装置。 - 複数の前記リードは、同一平面上に配置されることを特徴とする請求項5に記載の回路装置。
- 前記ケース材の前記内部空間に充填されるとともに、前記半導体素子を被覆する封止樹脂を更に備えることを特徴とする請求項5または請求項6に記載の回路装置。
- 前記回路基板の上面には、外部から入力された直流電力の電圧を昇圧するコンバータと、前記コンバータによって昇圧された直流電力を交流電力に変換するインバータと、が組み込まれ、
前記半導体素子は、前記コンバータまたは前記インバータを構成するものであることを特徴とする請求項1から請求項7の何れかに記載の回路装置。
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JP2012534925A JP6163305B2 (ja) | 2010-09-24 | 2011-09-15 | 回路装置 |
CN2011800562179A CN103222053A (zh) | 2010-09-24 | 2011-09-15 | 电路装置 |
US13/878,724 US9271397B2 (en) | 2010-09-24 | 2011-09-15 | Circuit device |
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US (1) | US9271397B2 (ja) |
JP (3) | JP6163305B2 (ja) |
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JP2018082069A (ja) * | 2016-11-17 | 2018-05-24 | 三菱電機株式会社 | 半導体装置および半導体装置の製造方法 |
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CN108231604A (zh) * | 2018-01-24 | 2018-06-29 | 韩德军 | 一种电力用半导体装置的制造方法 |
CN108364940B (zh) * | 2018-02-24 | 2020-07-07 | 江西源能电气技术有限公司 | 一种电力用逆变电路装置 |
CN108364943B (zh) * | 2018-02-24 | 2020-10-23 | 泰州市元和达电子科技有限公司 | 一种电力转换电路的封装模块 |
CN116798882B (zh) * | 2023-08-22 | 2024-01-30 | 哈尔滨工业大学(威海) | 一种双面散热结构功率模块的制造方法 |
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US20130286616A1 (en) | 2013-10-31 |
CN103222053A (zh) | 2013-07-24 |
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