WO2022018868A1 - 半導体装置、電力変換装置、移動体、および半導体装置の製造方法 - Google Patents
半導体装置、電力変換装置、移動体、および半導体装置の製造方法 Download PDFInfo
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- WO2022018868A1 WO2022018868A1 PCT/JP2020/028516 JP2020028516W WO2022018868A1 WO 2022018868 A1 WO2022018868 A1 WO 2022018868A1 JP 2020028516 W JP2020028516 W JP 2020028516W WO 2022018868 A1 WO2022018868 A1 WO 2022018868A1
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- electrode
- semiconductor device
- metal pattern
- joint surface
- outer peripheral
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W40/00—Arrangements for thermal protection or thermal control
- H10W40/20—Arrangements for cooling
- H10W40/25—Arrangements for cooling characterised by their materials
- H10W40/255—Arrangements for cooling characterised by their materials having a laminate or multilayered structure, e.g. direct bond copper [DBC] ceramic substrates
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W70/00—Package substrates; Interposers; Redistribution layers [RDL]
- H10W70/01—Manufacture or treatment
- H10W70/05—Manufacture or treatment of insulating or insulated package substrates, or of interposers, or of redistribution layers
- H10W70/093—Connecting or disconnecting other interconnections thereto or therefrom, e.g. connecting bond wires or bumps
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W72/00—Interconnections or connectors in packages
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W72/00—Interconnections or connectors in packages
- H10W72/50—Bond wires
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W90/00—Package configurations
- H10W90/701—Package configurations characterised by the relative positions of pads or connectors relative to package parts
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W99/00—Subject matter not provided for in other groups of this subclass
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters
- H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters with pulse width modulation
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W72/00—Interconnections or connectors in packages
- H10W72/071—Connecting or disconnecting
- H10W72/076—Connecting or disconnecting of strap connectors
- H10W72/07631—Techniques
- H10W72/07632—Compression bonding, e.g. thermocompression bonding
- H10W72/07633—Ultrasonic bonding, e.g. thermosonic bonding
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W90/00—Package configurations
- H10W90/701—Package configurations characterised by the relative positions of pads or connectors relative to package parts
- H10W90/751—Package configurations characterised by the relative positions of pads or connectors relative to package parts of bond wires
- H10W90/754—Package configurations characterised by the relative positions of pads or connectors relative to package parts of bond wires between a chip and a stacked insulating package substrate, interposer or RDL
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W90/00—Package configurations
- H10W90/701—Package configurations characterised by the relative positions of pads or connectors relative to package parts
- H10W90/761—Package configurations characterised by the relative positions of pads or connectors relative to package parts of strap connectors
- H10W90/764—Package configurations characterised by the relative positions of pads or connectors relative to package parts of strap connectors between a chip and a stacked insulating package substrate, interposer or RDL
Definitions
- the present disclosure relates to a semiconductor device, a power conversion device, a mobile body, and a method for manufacturing the semiconductor device.
- Patent Document 1 proposes a method of providing a protrusion on the surface of an electrode to increase the bonding strength when ultrasonically bonding.
- the metal powder generated on the bonding surface between the electrode and the metal pattern is scattered inside the semiconductor device due to the vibration during ultrasonic bonding, which causes a discharge or abnormal operation in the semiconductor device. There was the problem of being triggered.
- an object of the present disclosure is to provide a technique capable of suppressing the scattering of metal powder at the time of ultrasonic bonding and suppressing the occurrence of electric discharge and abnormal operation in a semiconductor device.
- the semiconductor device includes an insulating substrate having an insulating layer and a metal pattern formed on the insulating layer, and an electrode bonded on the metal pattern, and is bonded to the metal pattern on the electrode.
- An accommodating portion is formed on the inner peripheral side of the outer peripheral portion of the joint surface, which is the surface on the side of the surface, which is recessed upward and can accommodate the metal powder generated when the electrode and the metal pattern are joined.
- the outer peripheral portion of the joint surface of the electrode is joined on the metal pattern.
- the present disclosure it is possible to suppress the scattering of the metal powder by accommodating the metal powder generated at the time of joining the electrode and the metal pattern in the accommodating portion. As a result, it is possible to suppress the occurrence of electric discharge and abnormal operation caused by metal powder in the semiconductor device.
- FIG. It is sectional drawing of the semiconductor device which concerns on Embodiment 1.
- FIG. It is explanatory drawing of the ultrasonic bonding of the electrode and the metal pattern provided in the semiconductor device which concerns on Embodiment 1.
- FIG. It is a figure which looked at the junction surface of the electrode provided in the semiconductor device which concerns on Embodiment 1 from the bottom. It is a figure which looked at the part facing the junction surface of the electrode in the metal pattern provided with the semiconductor device which concerns on Embodiment 1 from above.
- FIG. It is a figure which looked at the junction surface of the electrode provided in the semiconductor device which concerns on Embodiment 2 from the bottom.
- FIG. It is explanatory drawing of the ultrasonic bonding of the electrode and the metal pattern provided in the semiconductor device which concerns on Embodiment 3.
- FIG. It is a figure which looked at the junction surface of the electrode provided in the semiconductor device which concerns on Embodiment 3 from the bottom. It is explanatory drawing of the ultrasonic bonding of the electrode and the metal pattern provided in the semiconductor device which concerns on Embodiment 4. It is a figure which looked at the part facing the junction surface of the electrode in the metal pattern provided with the semiconductor device which concerns on Embodiment 4 from above. It is explanatory drawing of the ultrasonic bonding of the electrode and the metal pattern provided in the semiconductor device which concerns on Embodiment 5.
- FIG. 5 is a view from above of a portion of the metal pattern of the semiconductor device according to the fifth embodiment facing the joint surface of the electrodes. It is explanatory drawing of the ultrasonic bonding of the electrode and the metal pattern provided in the semiconductor device which concerns on Embodiment 6. It is a figure which looked at the part facing the junction surface of the electrode in the metal pattern provided with the semiconductor device which concerns on Embodiment 6 from above. It is a block diagram which shows the structure of the power conversion system which includes the power conversion apparatus which concerns on Embodiment 7. It is a block diagram which shows the structure of the moving body which concerns on Embodiment 8.
- FIG. 1 is a schematic cross-sectional view of the semiconductor device 50 according to the first embodiment.
- the semiconductor device 50 includes an insulating substrate 1, a semiconductor element 20, and an electrode 10.
- the insulating substrate 1 includes an insulating layer 2, a metal pattern 3, and a lower surface pattern 4.
- the insulating layer 2 is made of ceramic or epoxy resin.
- the metal pattern 3 is provided on the upper surface of the insulating layer 2, and the lower surface pattern 4 is provided on the lower surface of the insulating layer 2.
- the metal pattern 3 is divided into, for example, two.
- the semiconductor element 20 is fixed to the upper surface of the insulating substrate 1, more specifically, the upper surface of the metal pattern 3. Further, the semiconductor element 20 is connected to a metal pattern 3 different from the metal pattern 3 to which the semiconductor element 20 is fixed via a wiring wire 21. Although only one semiconductor element 20 is shown in FIG. 1, a plurality of semiconductor elements 20 may be provided.
- the semiconductor element 20 is an IGBT (Insulated Gate Bipolar Transistor) chip, a Di (Diode) chip, or a MOSFET (metal oxide semiconductor field effect transistor) chip.
- IGBT Insulated Gate Bipolar Transistor
- Di Di
- MOSFET metal oxide semiconductor field effect transistor
- the electrode 10 is a lead frame, and the electrode 10 is bonded to the upper surface of the metal pattern 3 by ultrasonic bonding.
- the semiconductor device 50 further includes a case (not shown), a base plate, a lid, a sealing material, and the like, and the insulating substrate 1, the semiconductor element 20, and the electrode 10 are protected by the case and the sealing material.
- FIG. 2 is an explanatory diagram of ultrasonic bonding between the electrode 10 and the metal pattern 3.
- FIG. 3 is a view of the joint surface of the electrodes 10 as viewed from below.
- FIG. 4 is a view of the portion of the metal pattern 3 facing the joint surface of the electrodes 10 as viewed from above.
- the electrode 10 includes an accommodating portion 11 capable of accommodating the metal powder 31 generated at the time of joining the electrode 10 and the metal pattern 3.
- the accommodating portion 11 is formed on the inner peripheral side of the outer peripheral portion of the joint surface, which is the surface of the electrode 10 on the side to be joined to the metal pattern 3. More specifically, the accommodating portion 11 is an upwardly recessed recess formed in the central portion of the joint surface of the electrode 10.
- the accommodating portion 11 is formed in a rectangular shape when viewed from below, but is not limited to this, and may be formed in a circular shape when viewed from below.
- the outer peripheral portion of the joint surface of the electrode 10 is formed in a planar shape. That is, the outer peripheral portion of the joint surface of the electrode 10 projects downward with respect to the accommodating portion 11.
- the portion of the metal pattern 3 facing the joint surface of the electrode 10 is formed in a planar shape. Therefore, the portion of the metal pattern 3 facing the joint surface of the electrode 10 contacts the outer peripheral portion of the joint surface of the electrode 10.
- the insulating substrate 1 and the electrode 10 are prepared.
- the outer peripheral portion of the bonding surface of the electrode 10 is brought into contact with the metal pattern 3, and the upper surface of the bonding portion 10a of the electrode 10 is ultrasonically bonded while applying a load with the ultrasonic bonding tool 30. do.
- Metal powder 31 is generated by rubbing the electrode 10 and the metal pattern 3 during ultrasonic bonding. However, since the metal powder 31 is housed in the accommodating portion 11 formed on the bonding surface of the electrode 10, the metal powder is scattered. It can be suppressed.
- the bonding portion 10a of the electrode 10 is a portion on one end side of the electrode 10 bonded to the metal pattern 3, and the lower surface of the bonding portion 10a is the bonding surface of the electrode 10.
- the semiconductor device 50 includes an insulating substrate 1 having an insulating layer 2 and a metal pattern 3 formed on the insulating layer 2, and an electrode 10 bonded on the metal pattern 3.
- An accommodating portion 11 capable of accommodating the powder 31 is formed, and the outer peripheral portion of the bonding surface of the electrode 10 is bonded on the metal pattern 3.
- the accommodating portion 11 is a recess formed in the central portion of the joint surface of the electrode 10, the ratio of the accommodating portion 11 to the joint surface of the electrode 10 becomes large, and the accommodating capacity of the metal powder 31 is improved. This improves the effect of suppressing the scattering of the metal powder 31.
- the semiconductor device 50 further includes the semiconductor element 20 bonded on the metal pattern 3, the semiconductor device 20 includes a wide bandgap semiconductor, so that the energy saving of the semiconductor device 50 can be achieved.
- FIG. 5 is an explanatory diagram of ultrasonic bonding between the electrode 10 and the metal pattern 3 included in the semiconductor device 50 according to the second embodiment.
- FIG. 6 is a view of the joint surface of the electrode 10 as viewed from below.
- the same components as those described in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.
- the accommodating portion 11 is a groove portion formed along the outer peripheral portion of the joint surface of the electrode 10.
- the accommodating portion 11 is formed in a rectangular frame shape when viewed from below, but is not limited to this, and may be formed in an annular shape when viewed from below.
- the outer peripheral portion and the central portion of the joint surface of the electrode 10 are formed in a planar shape. That is, the outer peripheral portion and the central portion of the joint surface of the electrode 10 project downward with respect to the accommodating portion 11.
- the portion of the metal pattern 3 facing the joint surface of the electrode 10 is formed in a planar shape. Therefore, the portion of the metal pattern 3 facing the joint surface of the electrode 10 contacts the outer peripheral portion and the central portion of the joint surface of the electrode 10.
- the accommodating portion 11 is a groove portion formed along the outer peripheral portion of the joint surface of the electrode 10, it is compared with the case of the first embodiment. , The bonding area between the electrode 10 and the metal pattern 3 can be increased. Thereby, the bonding strength between the electrode 10 and the metal pattern 3 can be improved.
- FIG. 7 is an explanatory diagram of ultrasonic bonding between the electrode 10 and the metal pattern 3 included in the semiconductor device 50 according to the third embodiment.
- FIG. 8 is a view of the joint surface of the electrode 10 as viewed from below.
- the same components as those described in the first and second embodiments are designated by the same reference numerals and the description thereof will be omitted.
- the accommodating portion 11 is a groove portion formed along the outer peripheral portion of the joint surface of the electrode 10. Further, in the state before joining, a protruding portion 12 projecting downward is formed on the inner peripheral side of the accommodating portion 11 of the electrode 10, that is, at the central portion of the joining surface of the electrode 10. At this time, there is a gap between the outer peripheral portion of the joint surface of the electrode 10 and the metal pattern 3.
- the accommodating portion 11 is formed in a rectangular frame shape when viewed from below, and the protruding portion 12 is formed in a rectangular shape when viewed from below, but the accommodating portion 11 is not limited thereto.
- the protrusion 12 may be formed in an annular shape when viewed from below, or may be formed in a circular shape when viewed from below.
- the protruding portion 12 of the bonding surface of the electrode 10 is brought into contact with the metal pattern 3, and the upper surface of the bonding portion 10a of the electrode 10 is ultrasonically bonded while applying a load with the ultrasonic bonding tool 30. Since the protrusion 12 is crushed by the load applied during ultrasonic bonding, there is no gap between the outer peripheral portion of the joint surface of the electrode 10 and the metal pattern 3, and the outer peripheral portion of the joint surface of the electrode 10 is on the metal pattern 3. Bonded to. Since there is no gap between the outer peripheral portion of the joint surface of the electrode 10 and the metal pattern 3, the metal powder 31 generated in the protruding portion 12 can be accommodated in the accommodating portion 11.
- the accommodating portion 11 is a groove portion formed along the outer peripheral portion of the joint surface of the electrode 10, and is inside the accommodating portion 11 of the electrode 10.
- a protruding portion 12 projecting downward is formed on the peripheral side.
- the metal powder 31 generated in the central portion of the joint surface of the electrode 10, that is, the protruding portion 12 can be accommodated in the accommodating portion 11, the effect of suppressing the scattering of the metal powder 31 is improved.
- FIG. 9 is an explanatory diagram of ultrasonic bonding between the electrode 10 and the metal pattern 3 included in the semiconductor device 50 according to the fourth embodiment.
- FIG. 10 is a view of the portion of the metal pattern 3 facing the joint surface of the electrodes 10 as viewed from above.
- the same components as those described in the first to third embodiments are designated by the same reference numerals and the description thereof will be omitted.
- a downwardly recessed recess 5 is formed at a portion of the metal pattern 3 facing the joint surface of the electrode 10.
- the recessed portion 5 is formed in a portion of the metal pattern 3 facing the joint surface of the electrode 10 and a peripheral region thereof. Therefore, the planar view contour of the recessed portion 5 is larger than the bottom view contour of the joint portion 10a of the electrode 10.
- the recessed portion 5 recessed downward is formed at the portion of the metal pattern 3 facing the joint surface of the electrode 10, the electrode with respect to the metal pattern 3 is formed.
- the positioning of 10 can be easily performed. This makes it possible to improve the yield of the semiconductor device 50 in the ultrasonic bonding process.
- FIG. 11 is an explanatory diagram of ultrasonic bonding between the electrode 10 and the metal pattern 3 included in the semiconductor device 50 according to the fifth embodiment.
- FIG. 12 is a view of the portion of the metal pattern 3 facing the joint surface of the electrodes 10 as viewed from above.
- the same components as those described in the first to fourth embodiments are designated by the same reference numerals and the description thereof will be omitted.
- a recessed portion 5 is formed in the metal pattern 3 as in the case of the fourth embodiment. Further, the recessed portion 5 is formed with a protrusion 6 that protrudes upward and is accommodated in the accommodating portion 11 of the electrode 10.
- the protrusion 6 is formed according to the shape of the accommodating portion 11.
- the protrusion 6 is also formed in a rectangular frame shape when viewed from above, and when the accommodating portion 11 is formed in an annular shape when viewed from below.
- the protrusion 6 is also annular when viewed from above.
- the recessed portion 5 of the metal pattern 3 is formed with a protrusion 6 that protrudes upward and is accommodated in the accommodating portion 11 of the electrode 10. .. Since the metal powder 31 generated directly under the ultrasonic bonding tool 30, that is, due to the friction between the accommodating portion 11 and the protrusion 6, can be accommodated in the gap between the accommodating portion 11 and the protrusion 6, the metal powder 31 can be accommodated. It is possible to further enhance the effect of suppressing scattering.
- the positioning of the electrode 10 with respect to the metal pattern 3 can be performed more easily than in the case of the fourth embodiment. This makes it possible to further improve the yield of the semiconductor device 50 in the ultrasonic bonding process.
- FIG. 13 is an explanatory diagram of ultrasonic bonding between the electrode 10 and the metal pattern 3 included in the semiconductor device 50 according to the sixth embodiment.
- FIG. 14 is a view of the portion of the metal pattern 3 facing the joint surface of the electrodes 10 as viewed from above.
- the same components as those described in the first to fifth embodiments are designated by the same reference numerals, and the description thereof will be omitted.
- a capturing portion 7 capable of capturing the metal powder 31 is provided at a position of the metal pattern 3 facing the outer peripheral portion of the joint surface of the electrode 10. .. Specifically, the capture portion 7 is provided at the location of the metal pattern 3 facing the outer peripheral portion of the joint surface of the electrode 10 and the peripheral region thereof. The capturing portion 7 is formed in accordance with the shape of the outer peripheral portion of the joint surface of the electrode 10, and is formed in a rectangular frame shape when viewed from above.
- the catching portion 7 is made of a material different from that of the metal pattern 3.
- the material different from the metal pattern 3 is, for example, an adhesive or solder.
- the capture unit 7 can capture the metal powder 31 by taking any of a paste state before solidification, a state during solidification, and a solidification state.
- the recessed portion 5 is formed on the inner peripheral side of the capturing portion 7, that is, at the central portion of the joint surface of the electrode 10.
- the metal pattern 3 facing the outer peripheral portion of the joint surface of the electrode 10 is made of a material different from the metal pattern 3 and is made of a metal powder 31.
- a capturing unit 7 capable of capturing the metal is provided.
- the metal powder 31 generated by the friction between the outer peripheral portion of the joint surface of the electrode 10 and the metal pattern 3 can be captured by the capture portion 7.
- the effect of suppressing the scattering of the metal powder 31 can be further enhanced.
- FIG. 15 is a block diagram showing a configuration of a power conversion system including the power conversion device 200 according to the seventh embodiment.
- the same components as those described in the first to sixth embodiments are designated by the same reference numerals, and the description thereof will be omitted.
- the power conversion system shown in FIG. 15 includes a power supply 100, a power conversion device 200, and a load 300.
- the power supply 100 is a DC power supply, and supplies DC power to the power conversion device 200.
- the power supply 100 can be configured with various power sources, for example, it may be composed of a DC system, a solar cell, a storage battery, or may be composed of a rectifier circuit or an AC / DC converter connected to an AC system. good. Further, the power supply 100 may be configured by a DC / DC converter that converts the DC power output from the DC system into a predetermined power.
- the power conversion device 200 is a three-phase inverter connected between the power supply 100 and the load 300, converts the DC power supplied from the power supply 100 into AC power, and supplies AC power to the load 300.
- the power conversion device 200 includes a main conversion circuit 201 that converts DC power into AC power and outputs it, and a drive circuit 202 that outputs a drive signal that drives each switching element of the main conversion circuit 201.
- a control circuit 203 that outputs a control signal for controlling the drive circuit 202 to the drive circuit 202 is provided.
- the load 300 is a three-phase electric motor driven by AC power supplied from the power conversion device 200.
- the load 300 is not limited to a specific application, and is used as an electric motor mounted on various electric devices, for example, a hybrid vehicle, an electric vehicle, a railroad vehicle, an elevator, or an electric motor for an air conditioning device.
- the main conversion circuit 201 includes a switching element and a freewheeling diode (not shown), and by switching the switching element, the DC power supplied from the power supply 100 is converted into AC power and supplied to the load 300.
- the main conversion circuit 201 according to the seventh embodiment is a two-level three-phase full bridge circuit
- the three-phase full bridge circuit is a two-level three-phase full bridge circuit. It can be composed of six switching elements and six freewheeling diodes antiparallel to each switching element.
- the semiconductor device 50 according to any one of the above-described embodiments 1 to 6 is applied to at least one of each switching element and each freewheeling diode of the main conversion circuit 201.
- the six switching elements are connected in series for each of the two switching elements to form an upper and lower arm, and each upper and lower arm constitutes each phase (U phase, V phase, W phase) of the full bridge circuit. Then, the output terminals of each upper and lower arm, that is, the three output terminals of the main conversion circuit 201 are connected to the load 300.
- the drive circuit 202 generates a drive signal for driving the switching element of the main conversion circuit 201 and supplies it to the control electrode of the switching element of the main conversion circuit 201. Specifically, the drive circuit 202 outputs a drive signal for turning on the switching element and a drive signal for turning off the switching element to the control electrode of each switching element according to the control signal from the control circuit 203 described later. do.
- the drive signal is a voltage signal (on signal) equal to or higher than the threshold voltage of the switching element
- the drive signal is a voltage equal to or lower than the threshold voltage of the switching element. It becomes a signal (off signal).
- the control circuit 203 controls the switching element of the main conversion circuit 201 so that the desired power is supplied to the load 300. Specifically, the control circuit 203 calculates the time (on time) for each switching element of the main conversion circuit 201 to be in the on state based on the electric power to be supplied to the load 300. For example, the control circuit 203 can control the main conversion circuit 201 by PWM (Pulse Width Modulation) control that modulates the on-time of the switching element according to the voltage to be output. Then, the control circuit 203 gives a control command (control signal) to the drive circuit 202 so that an on signal is output to the switching element that should be turned on at each time point and an off signal is output to the switching element that should be turned off. Is output. The drive circuit 202 outputs an on signal or an off signal as a drive signal to the control electrode of each switching element according to this control signal.
- PWM Pulse Width Modulation
- the semiconductor device 50 according to the first to sixth embodiments is applied as at least one of the switching element and the freewheeling diode of the main conversion circuit 201. , It is possible to improve the reliability.
- the semiconductor device 50 according to any one of the first to sixth embodiments is applied to the two-level three-phase inverter. It is not limited to the above, and can be applied to various power conversion devices.
- the semiconductor device 50 according to any one of the first to sixth embodiments is a two-level power conversion device, but a three-level or multi-level power conversion device may be used.
- the semiconductor device 50 may be applied to the single-phase inverter.
- the semiconductor device 50 can be applied to a DC / DC converter or an AC / DC converter.
- the power conversion device 200 according to the seventh embodiment is not limited to the case where the load described above is an electric motor, and is, for example, a discharge machine, a laser machine, an induction heating cooker, or a non-contact power supply. It can be used as a power supply device for a system, and can also be used as a power conditioner for a photovoltaic power generation system, a power storage system, or the like.
- FIG. 16 is a block diagram showing the configuration of the mobile body 400 according to the eighth embodiment.
- the same components as those described in the first to seventh embodiments are designated by the same reference numerals, and the description thereof will be omitted.
- the mobile body 400 shown in FIG. 16 is equipped with the power conversion device 200 according to the seventh embodiment, and the mobile body 400 can be moved by using the output from the power conversion device 200. According to such a configuration, the weight of the mobile body 400 can be reduced by reducing the size and weight of the converter. As a result, high efficiency and high performance of the mobile body 400 can be expected.
- the moving body 400 has been described here as being a railroad vehicle, the moving body 400 is not limited to this, and may be, for example, a hybrid vehicle, an electric vehicle, an elevator, or the like.
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Abstract
Description
実施の形態1について、図面を用いて以下に説明する。図1は、実施の形態1に係る半導体装置50の断面模式図である。
次に、実施の形態2に係る半導体装置について説明する。図5は、実施の形態2に係る半導体装置50が備える電極10と金属パターン3との超音波接合の説明図である。図6は、電極10の接合面を下方から視た図である。なお、実施の形態2において、実施の形態1で説明したものと同一の構成要素については同一符号を付して説明は省略する。
次に、実施の形態3に係る半導体装置の製造方法について説明する。図7は、実施の形態3に係る半導体装置50が備える電極10と金属パターン3との超音波接合の説明図である。図8は、電極10の接合面を下方から視た図である。なお、実施の形態3において、実施の形態1,2で説明したものと同一の構成要素については同一符号を付して説明は省略する。
次に、実施の形態4に係る半導体装置50について説明する。図9は、実施の形態4に係る半導体装置50が備える電極10と金属パターン3との超音波接合の説明図である。図10は、金属パターン3における電極10の接合面に対向する箇所を上方から視た図である。なお、実施の形態4において、実施の形態1~3で説明したものと同一の構成要素については同一符号を付して説明は省略する。
次に、実施の形態5に係る半導体装置50について説明する。図11は、実施の形態5に係る半導体装置50が備える電極10と金属パターン3との超音波接合の説明図である。図12は、金属パターン3における電極10の接合面に対向する箇所を上方から視た図である。なお、実施の形態5において、実施の形態1~4で説明したものと同一の構成要素については同一符号を付して説明は省略する。
次に、実施の形態6に係る半導体装置50について説明する。図13は、実施の形態6に係る半導体装置50が備える電極10と金属パターン3との超音波接合の説明図である。図14は、金属パターン3における電極10の接合面に対向する箇所を上方から視た図である。なお、実施の形態6において、実施の形態1~5で説明したものと同一の構成要素については同一符号を付して説明は省略する。
次に、実施の形態7に係る電力変換装置について説明する。図15は、実施の形態7に係る電力変換装置200を備える電力変換システムの構成を示すブロック図である。なお、実施の形態7において、実施の形態1~6で説明したものと同一の構成要素については同一符号を付して説明は省略する。
次に、実施の形態8に係る移動体400について説明する。図16は、実施の形態8に係る移動体400の構成を示すブロック図である。なお、実施の形態8において、実施の形態1~7で説明したものと同一の構成要素については同一符号を付して説明は省略する。
Claims (11)
- 絶縁層と前記絶縁層上に形成された金属パターンとを有する絶縁基板と、
前記金属パターン上に接合された電極と、を備え、
前記電極における前記金属パターンに接合される側の面である接合面の外周部よりも内周側には、上方に凹み、かつ、前記電極と前記金属パターンとの接合時に発生する金属粉を収容可能な収容部が形成され、
前記電極における前記接合面の前記外周部が前記金属パターン上に接合されている、半導体装置。 - 前記収容部は、前記電極における前記接合面の中央部に形成された凹部である、請求項1に記載の半導体装置。
- 前記収容部は、前記電極における前記接合面の前記外周部に沿って形成された溝部である、請求項1に記載の半導体装置。
- 前記電極の前記接合面に対向する前記金属パターンの箇所には、下方に凹む凹み部が形成された、請求項1から請求項3のいずれか1項に記載の半導体装置。
- 前記金属パターンの前記凹み部には、上方に突出し、かつ、前記電極の前記収容部に収容される突起部が形成された、請求項4に記載の半導体装置。
- 前記電極における前記接合面の前記外周部に対向する前記金属パターンの箇所には、前記金属パターンとは異なる材料からなり、かつ、前記金属粉を捕捉可能な捕捉部が設けられた、請求項1から請求項3のいずれか1項に記載の半導体装置。
- 前記金属パターン上に接合された半導体素子をさらに備え、
前記半導体素子は、ワイドバンドギャップ半導体を含む、請求項1から請求項6のいずれか1項に記載の半導体装置。 - 請求項1から請求項7のいずれか1項に記載の半導体装置を有し、入力される電力を変換して出力する主変換回路と、
前記半導体装置を駆動する駆動信号を前記半導体装置に出力する駆動回路と、
前記駆動回路を制御する制御信号を前記駆動回路に出力する制御回路と、
を備えた、電力変換装置。 - 請求項8に記載の電力変換装置が搭載された、移動体。
- 請求項1に記載の半導体装置の製造方法であって、
(a)前記絶縁基板および前記電極を準備する工程と、
(b)前記電極における前記接合面の前記外周部を前記金属パターン上に接触させて、超音波接合ツールで荷重を加えながら超音波接合する工程と、
を備えた、半導体装置の製造方法。 - 前記工程(a)において、前記収容部は、前記電極における前記接合面の前記外周部に沿って形成された溝部であり、前記電極における前記溝部よりも内周側には、下方に突出する突出部が形成されている、請求項10に記載の半導体装置の製造方法。
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| CN202080104706.6A CN116171490B (zh) | 2020-07-22 | 2020-07-22 | 半导体装置、电力变换装置、移动体以及半导体装置的制造方法 |
| US17/996,774 US20230170323A1 (en) | 2020-07-22 | 2020-07-22 | Semiconductor device, power converter, moving vehicle, and semiconductor device manufacturing method |
| DE112020007447.1T DE112020007447T5 (de) | 2020-07-22 | 2020-07-22 | Halbleitervorrichtung, Leistungsumwandlungsvorrichtung, sich bewegender Körper und Herstellungsverfahren für eine Halbleitervorrichtung |
| JP2022538561A JP7217837B2 (ja) | 2020-07-22 | 2020-07-22 | 半導体装置、電力変換装置、移動体、および半導体装置の製造方法 |
| PCT/JP2020/028516 WO2022018868A1 (ja) | 2020-07-22 | 2020-07-22 | 半導体装置、電力変換装置、移動体、および半導体装置の製造方法 |
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| WO2024038511A1 (ja) * | 2022-08-17 | 2024-02-22 | 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 |
| JP2025507816A (ja) * | 2022-03-03 | 2025-03-21 | ヒタチ・エナジー・リミテッド | 半導体パワーモジュールのための金属基板構造に端子を取り付ける方法および半導体パワーモジュール |
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| US20230170323A1 (en) | 2023-06-01 |
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