EP4381909A1 - Leistungsschaltung und verfahren zum herstellen einer leistungsschaltung - Google Patents
Leistungsschaltung und verfahren zum herstellen einer leistungsschaltungInfo
- Publication number
- EP4381909A1 EP4381909A1 EP22760714.0A EP22760714A EP4381909A1 EP 4381909 A1 EP4381909 A1 EP 4381909A1 EP 22760714 A EP22760714 A EP 22760714A EP 4381909 A1 EP4381909 A1 EP 4381909A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- power
- power module
- circuit board
- connections
- control circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/14—Mounting supporting structure in casing or on frame or rack
- H05K7/1422—Printed circuit boards receptacles, e.g. stacked structures, electronic circuit modules or box like frames
- H05K7/1427—Housings
- H05K7/1432—Housings specially adapted for power drive units or power converters
-
- 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
-
- 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
- H10W72/075—Connecting or disconnecting of bond wires
- H10W72/07551—Connecting or disconnecting of bond wires characterised by changes in properties of the bond wires during the connecting
- H10W72/07552—Connecting or disconnecting of bond wires characterised by changes in properties of the bond wires during the connecting changes in structures or sizes
-
- 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
- H10W72/521—Structures or relative sizes of bond wires
-
- 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
- H10W72/541—Dispositions of bond wires
- H10W72/5445—Dispositions of bond wires being orthogonal to a side surface of the chip, e.g. parallel arrangements
-
- 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
- H10W72/90—Bond pads, in general
- H10W72/931—Shapes of bond pads
- H10W72/932—Plan-view shape, i.e. in top view
-
- 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
Definitions
- the present invention relates to a power circuit, in particular a power inverter or a power DC/DC converter, specifically for an electrically driven motor vehicle. Furthermore, the invention relates to a method for producing said power circuit.
- power circuits such as As power inverters or power DC-DC converters are used in many power systems such. B. electrically powered vehicles used.
- a reliable functionality of the power circuits is enormously important due to their place of use. This results in the general requirement to make the power circuits more reliable in terms of their functionality.
- the power circuits must also be manufactured as cost-effectively as possible.
- the object of the present application is therefore to provide a possibility with which an above-mentioned power circuit can be designed more reliably and manufactured more cost-effectively.
- a power circuit in particular a power inverter or a power DC/DC converter, specifically for an electrically driven motor vehicle, is provided.
- the power circuit has at least one power module, for example an inverter half-bridge, which has at least one encapsulated or molded section (or circuit section).
- the power circuit also has at least one control circuit board, which is arranged on the power module.
- the power module has contact surfaces (or contact elements with contact surfaces), which are provided on a top side of the power module facing the control circuit board. The contact surfaces are used to create signal-carrying power connections with the control circuit board.
- the control printed circuit board has at least one recess which at least partially exposes the aforementioned contact surfaces on the section of the power module.
- the control circuit board also has contact surfaces that are located on the edge of the recess.
- the contact surfaces on the section of the power module are each connected to the respective corresponding contact surfaces of the control circuit board via direct (or directly and at least partially) power connections passed through the above-mentioned recess or reaching up to the recess.
- the contact surfaces of the control printed circuit board are each (directly) electrically connected to the respective contact surfaces on the section of the power module.
- the power module typically has power circuit components such as B. power semiconductor switches, which form one or more of the inverter half bridges of the power inverter, for example, in the event that the power circuit is a polyphase power inverter.
- B. power semiconductor switches which form one or more of the inverter half bridges of the power inverter, for example, in the event that the power circuit is a polyphase power inverter.
- the injection molding compound or molding compound fixes the power circuit components to one another and possibly also to the components of the power module or the power circuit outside the circuit section.
- the injection molding compound or molding compound serves as a mechanical protection to protect the circuit section of the power module and thus the power circuit components in the injection molding compound or molding compound from mechanical influences such. B. external mechanical shocks.
- the injection molding compound or molding compound is used for electrical insulation between the power circuit components in the section.
- the injection molding compound or molding compound forms a stable mount for the circuit section or the power circuit components and their power current and signal connections.
- the spraying compound or molding compound forms a support frame section with corresponding projections, such as. B. projections, depressions, grooves and / or Studs, used to attach the power module to other power circuit components and/or external devices.
- the injection molding compound or molding compound can serve as a holder for the power and signal connections of the power module.
- Thermosetting plastics, hard casting materials and also cement, for example, can be used as the starting material for the injection molding compound or molding compound.
- the power module can be designed, for example, as a frame module or a molded module.
- the control circuit board is mounted on the power module, this being mounted on the circuit section by known means such as e.g. B. screws can be attached.
- a control circuit for controlling the power module can be formed on the control printed circuit board.
- the power module has contact surfaces for producing (in particular signal-carrying) current connections, which face the control circuit board.
- the contact surfaces facing the control circuit board enable short current connections from the power module to the control circuit board above.
- the contact surfaces are formed, for example, as signal pads integrated into the power module or into the circuit section (or into the injection molding compound or molding compound).
- the contact surfaces can be formed by connections (in particular signal-carrying) of the power circuit components embedded in the injection molding compound or molding compound, which are still covered by the injection molding compound or molding compound.
- the contact surfaces serve to transmit the (module-internal) control and sensor signals.
- the control printed circuit board in turn has at least one recess which at least partially exposes the above-mentioned contact surfaces on the power module or the circuit section.
- the recess or the exposure of the contact surfaces on the circuit section enable the formation of direct, space-saving power connections between circuit components of the control circuit board, which are arranged on an upper side of the control circuit board facing away from the power module or circuit section, and the power circuit components on the circuit section through the recess.
- the recess facilitates the connection process in which the power connections are attached to the contact pads of the circuit section, such as e.g. B. by (wire) bonding, soldering, sintering, (laser) welding.
- the to Connection required means or tools can be placed through the recess on the contact surfaces of the circuit section.
- control printed circuit board has contact surfaces which are electrically connected to the contact surfaces on the circuit section via direct current connections (or directly) routed through the recess.
- the contact surfaces on the control circuit board are located at the edge of the recess, in particular on an upper side of the control circuit board facing away from the power module or circuit section.
- the contact surfaces of the control circuit board are used, in particular, and analogously to the contact surfaces of the power module, to transmit the control and sensor signals (internal to the circuit board).
- the recess In addition to the formation of direct, space-saving power connections, the recess also enables the power connections, which are largely routed through the recess and are thus surrounded by the control circuit board material, to be protected by the control circuit board from external influences, such as e.g. B. mechanical shocks are effectively protected.
- the aforementioned power circuit components are, for example, as silicon (Si) - or silicon carbide (SiC) based semiconductor switches such.
- Si silicon
- SiC silicon carbide
- IGBT Insulated Gate Bipolar Transistor
- MOSFET silicon MOSFETs
- SiC-MOSFET silicon carbide MOSFETs
- control circuit board for controlling the power module is not integrated in the power module or the molded or remodeled circuit section, the power circuit can be produced with low production costs and a high level of flexibility in the selection and parameterization of the control circuit board.
- a disadvantage that due to the spatial separation of the control circuit board from the power module, a low (parasitic) inductance in the control circuit from the control circuit board to the power module is difficult to achieve, can be overcome by the direct (or direct) power connections routed through the recess from the control circuit board to the power module can be avoided or its negative impact reduced.
- the direct routed through the recess power connections the geometry of the (signal) wiring of the power connections, ie through the spanned area of forward and return conductors between the control circuit board on the one hand and the power module or the individual Power circuit components on the other hand, and thus the parasitic inductance can be reduced in this wiring. Consequently, fast and thus low-loss switching of the power circuit components or silicon (Si) or silicon carbide (SiC)-based semiconductor switches is made possible.
- the direct, short power connections routed through the recess avoid the otherwise necessary, laterally longer (signal) cable routing on the power module, which involves comparatively higher parasitic inductances and is also susceptible to external influences, such as e.g. B. mechanical shocks.
- the power connections routed directly through the recess can be implemented in a technically simple manner using simple means or tools.
- the contact surfaces on the circuit section of the power module can be produced without additional sealing surfaces for the contacts using injection or molding tools.
- the power circuit can be used for operating voltages of up to 1000 volts.
- the contact areas on the circuit section of the power module or the contact areas on the control printed circuit board can be implemented on a relatively small area with a contact density of at least 10 contacts per square centimeter.
- the recess facilitates the use of inexpensive, tried and tested reliable connection techniques such. B. bond, press-fit, plug, solder, sinter, or (laser) welded connection.
- This provides a way of using a power circuit, such as e.g. B. a power inverter or a power DC-DC converter, especially for an electrically powered motor vehicle, more reliable and cost-effective to manufacture.
- a power circuit such as e.g. B. a power inverter or a power DC-DC converter
- the power connections are designed as bonded connections or press-fit connections or plug-in connections.
- the power connections can also be designed as soldered connections or sintered connections or welded connections or laser-welded connections.
- the bonded connections can be passed directly through the recess. If the power connections are designed as press-fit or plug-in connections, the press-fit or plug-in connections can be pushed through the recess (or recesses).
- the control printed circuit board can have a number of recesses, in particular the same number of recesses as the number of press-fit pins. In this case, the press-fit pins are each pressed through one of the recesses.
- the press-fit pins are arranged or attached to the corresponding contact surfaces on the circuit section of the power module as follows: First, the circuit section is overmolded or overmoulded, with the corresponding contact surfaces not being covered by the injection or Molding compound are covered or are exposed by the injection or molding compound. Then the press-fit pins are attached to the respective corresponding contact surfaces, for example soldered, sintered or welded (ultrasound welded or laser welded).
- the press-fit pins are pressed or passed through the respective corresponding recesses.
- the recesses may be preformed prior to placing and attaching the control circuit board on the power module or may be formed during placement and attachment by inserting the press-fit pins through corresponding locations in the control circuit board.
- the power circuit can have inlays made of copper or a comparable low-resistance material, which are at least partially arranged in the recess, or inserted into the recess, or are inserted through the recess.
- the contact surfaces of the control circuit board are molded on the inserts.
- the contact surfaces of the power module are then soldered or sintered or (laser) welded onto the inserts or onto the contact surfaces of the control circuit board on the inserts.
- the inserts form, for example, part of the power connections and at the same time also part of the contact surfaces of the control circuit board.
- the contact surfaces on the section of the power module are in the same plane as the top side of the power module facing the control circuit board.
- the contact surfaces on the section of the power module do not protrude more than 1 mm above the level of the upper side of the power module facing the control printed circuit board, or are embedded no more than 1 mm into this upper side of the power module.
- the contact surfaces of the power module can be on the same level as a projection of the section, with the projection protruding relative to the rest of the section and/or protruding into the recess or even protruding through the recess.
- the contact surfaces of the power module may be in the same plane as the top of the control circuit board facing the power module, or no more than 1 mm above the level of the top of the control circuit board facing the power module, or no more than 1 mm below the Level of the top of the control circuit board facing the power module.
- the contact surfaces of the power module may be in the same plane as the top of the control PCB facing away from the power module, or no more than 1 mm above the level of the top of the control PCB facing away from the power module, or no more than 1 mm below the level on the top of the control circuit board facing away from the power module.
- the contact surfaces of the power module lie on the same level as a depression in the section, the depression lying deeper than the rest of the section.
- the indentation is formed, in particular, in the form of a blind hole surrounded by the edge.
- the contact areas of the control circuit board are formed on the bottom of the blind hole.
- the contact surfaces of the control circuit board are provided on a top side of the control circuit board that faces away from the power module.
- the contact areas of the control circuit board can be provided on a top side of the control circuit board that faces the power module.
- control circuit board rests directly on the power module section.
- control printed circuit board can rest indirectly on the section of the power module via an intermediate layer of the power module or the power circuit.
- the intermediate layer can be an insulating layer or an electromagnetic shielding layer (or an electromagnetic shielding device to improve the electromagnetic compatibility (EMC) of the power circuit) that electrically isolates or electromagnetically shields the power module from the control circuit board.
- the intermediate layer has (viewed in the direction of longitudinal extent and transverse direction of extent of the power module) at the height of the recess in the control circuit board a recess which, like the recess in the control circuit board, exposes the contact surfaces of the power module.
- control circuit board has a control circuit which is connected to the contact surfaces of the control circuit board in a signal-transmitting manner.
- the power module has exposed power connections, which protrude from the molded or molded section at least on an upper side of the power module and extend parallel to the longitudinal extension direction of the power module.
- the power module has power semiconductor switches with control connections, the control connections being connected to the contact surfaces of the power module in a signal-transmitting manner.
- the power module can also have connections for the transmission of (low-power) signals (signals without high power transmission), such as e.g. B. sensor signals (e.g. signals of a current or temperature measurement) or data signals.
- the recess in the control circuit board extends through the entire thickness of the control circuit board and forms a sealed through hole in the control circuit board.
- the contact surfaces are arranged in several groups, which are isolated from one another by a minimum distance from one another (depending on the line requirements) for voltages of less than 100 volts or at least 100 volts, 200 volts, 400 volts or 800 volts, 1000 volts or more.
- the recess can be at least partially filled with an insulating material that electrically insulates the respective contact surface groups from one another for voltages of less than 100 volts or at least 100 volts, 200 volts, 400 volts or 800 volts, 1000 volts or more.
- the recess in the control circuit board (possibly also the recess in the intermediate layer of the power module or the power circuit) is at least partially filled with an insulating material.
- the power circuit is designed as a multi-phase inverter or a part thereof, or as an inverter half-bridge with a control circuit board.
- the power circuit has at least one driver circuit of the inverter or the inverter half-bridge.
- the power module can have one or more inverter half-bridges, or one or more power semiconductors or power semiconductor switches.
- a method of manufacturing a power circuit as described above is provided.
- At least one power module is provided. At least a portion of the power module is overmolded or overmolded. The section of the power module is overmolded or overmoulded in such a way that it has at least one contact surface on an upper side of the power module on which a control circuit board of the power circuit is arranged or which will face the control circuit board to be arranged subsequently. At least one control printed circuit board with at least one recess is arranged on the power module. The control printed circuit board is arranged on the power module in such a way that the recess at least partially exposes the contact surface of the power module.
- the contact surface of the power module is connected to at least one contact surface of the control circuit board, which is located at the edge of the recess of the control circuit board, via a direct power connection that is at least partially routed through the recess or reaches up to the recess.
- FIG. 1 shows a section of a power circuit according to a first exemplary embodiment of the invention in a schematic cross-sectional representation
- FIG. 2 shows a section of the power circuit from FIG. 1 in a schematic plan view
- FIG. 3 shows a further schematic cross-sectional illustration of a section of a power circuit according to a second exemplary embodiment of the invention
- FIG. 4 shows a further schematic cross-sectional illustration of a section of a power circuit according to a third exemplary embodiment of the invention.
- FIG. 5 shows a further schematic cross-sectional representation of a section of a power circuit according to a fourth exemplary embodiment of the invention.
- FIG. 1 and 2 each show a schematic cross-sectional representation and a schematic plan view of a section of a power circuit LS according to a first exemplary embodiment of the invention, which forms part of a multi-phase power inverter of an electrically driven vehicle, for example.
- the power circuit LS has a power module LM with a power semiconductor switch HS (or two or more power semiconductor switches, each of which can consist of one or more power semiconductors) as an inverter half bridge or more inverter half bridges of the power inverter or a part thereof and a control circuit SS for driving the power module LM or .
- the power module LM is on a ceramic circuit board KT such. B. a DBG or AM B carrier (in English "Direct Bond Copper (DBC)" or "Active Metal Brazed (AMB) Ceramic Substrates") formed.
- the control circuit SS is formed on a control circuit board ST, which is arranged on the power module LM.
- the power module LM can also be embodied (via an electrical insulation layer) directly on a heat sink (thus without a ceramic circuit carrier).
- the power module LM has a circuit section AB, which is molded (or encapsulated) by an electrically insulating molding compound MM (or an electrically insulating spraying compound).
- the power semiconductor switch HS (or the power semiconductor switches) is at least partially embedded in the molding compound MM (or injection molding compound) and forms part of the circuit section AB.
- the power module LM On a top side OS1 of the circuit section AB facing the control circuit board ST, the power module LM has electrical contact areas KF1 (e.g. in the form of bondable signal pads), which are essentially in the same plane as that of the top side OS1 of the circuit section AB and are therefore not covered by the molding compound MM (or spraying compound).
- the contact surfaces KF1 are used to produce control-signal-carrying contacts between the power semiconductor switch HS (or the power semiconductor switches) and the control circuit SS.
- the contact surfaces KF1 either form the top-side control signal connection of the power semiconductor switch HS (or the top-side control signal connections of the power semiconductor switches) or are connected to the top-side control signal connection of the power semiconductor switch HS (or the top-side control signal connections of the Power semiconductor switch) electrically contacted directly.
- the power semiconductor switch HS is formed as a silicon IGBT with a diode or as a silicon carbide MOSFET (or the power semiconductor switches are formed as silicon IGBTs each with a diode or silicon carbide MOSFETs).
- the contact surfaces KF1 of the power module LM form the gate connections (or the auxiliary emitter connections or the Kelvin source connections) of the respective power semiconductor switch HS, or are connected to the gate connections (or the auxiliary emitter Connections or the Kelvin source connections) of the respective power semiconductor switches HS directly (or indirectly via gate series resistors or via other circuit components in the gate drive circuit) electrically connected.
- the power module LM also has power terminals LA in the form of bus bars, which extend out of the circuit section AB and thus out of the molding compound MM (or injection molding compound) in a longitudinal extension direction LR of the power circuit LS or the power module LM extend.
- the power connections LA are each directly electrically connected to the respective corresponding underside power current connections of the power semiconductor switch HS (or the power semiconductor switch), for example soldered, sintered or welded onto the respective corresponding power current connections.
- the power connections LA are arranged on a top side of the power semiconductor switch HS (or the control signal connections of the power semiconductor switches) facing away from the control circuit board ST and are directly electrically connected to the underside power current connections of the power semiconductor switch HS (or the power semiconductor switches).
- the power terminals LA each have an exposed end portion via which the power module LM to external electrical devices such. B. is electrically connected to an energy storage device or an electric motor. Depending on their connections to the corresponding power current connections of the power semiconductor switch HS (or the power semiconductor switches), the power connections LA each form a supply current connection or a phase current connection.
- the power connections LA rest on the ceramic carrier KT and are physically and thermally connected to the ceramic carrier KT.
- the power connections LA are typically electrically connected directly or indirectly (for example via a shunt) to the power connections of the power semiconductor HS or the power semiconductors.
- the power connections LA are directly electrically connected to the collector or emitter connections of the respective power semiconductor switch HS. If the power semiconductor switch HS (or the power semiconductor switches are) formed as silicon carbide MOSFETs, then the power connections LA are directly electrically connected to the drain or source connections of the respective power semiconductor switch HS.
- the control printed circuit board ST has at least one recess AS, which extends through the entire thickness of the control printed circuit board ST and forms a through-hole in the control printed circuit board ST which is enclosed at the edge.
- the recess AS is located at the level of the contact surfaces KF1, viewed in a direction of longitudinal extent LR of the power circuit LS or of the power module LM, and thus exposes the contact surfaces KF1.
- the control circuit board ST also has electrical contact areas KF2 (for example in the form of bondable signal pads) which are arranged on a top side OS2 of the control circuit board ST facing away from the power module LM and on the edge of the cutout AS.
- the contact surfaces KF2 are used analogously to the contact surfaces KF1 of the power module LM to produce control-signal-carrying contacts between the power semiconductor switch HS (or the power semiconductor switches) of the power module LM and the control circuit SS.
- the contact surfaces KF2 form part of the control circuit SS.
- the power circuit LS also has bond connections BD as current connections, which are routed directly through the recess AS and electrically connect the respective contact surfaces KF2 of the control circuit board ST directly to the respective corresponding contact surfaces KF1 of the power module LM. Due to the spatial distance and the electrically insulating molding compound MM (or injection molding compound) between the bond connections BD on the one hand and the power connections LA on the other hand, the bond connections BD are optimally electrically insulated from the power connections LA. Accordingly, the power circuit LS can be used for (operating) voltages and voltage differences of 1000 volts and above. For mechanical stabilization and/or for electrical insulation of the bond connections BD, the cavity of the recess AS can be covered with a correspondingly suitable insulation material (such as glob top, for example).
- the contact surfaces KF1 of the power module LM close flat with the surface of the molding compound MM (or injection molding compound) of the top side OS1 of the circuit section AB facing the control printed circuit board ST. As a result, no additional sealing surfaces are required on the mold tool.
- the distances between the bond connections BD can be reduced to a length of a few millimeters, depending on the thickness of the control circuit board ST. Bond wire distances of 1 millimeter and below are also easy to achieve. Accordingly, power connections with a parasitic inductance well below 5 nH (nanohenry) can be implemented.
- the power circuit LS is produced, for example, as follows:
- the power module LM is provided.
- Section AB of the power module LM is overmolded or overmoulded.
- the section AB of the power module LM is overmoulded or encapsulated in such a way that it has at least one contact surface KF1 on the upper side OS1 of the power module LM facing the control circuit board ST to be placed next.
- control printed circuit board ST with the recess AS is placed on the power module LM.
- the control printed circuit board ST is arranged on the power module LM in such a way that the recess AS at least partially exposes the contact surface KF1.
- FIG. 3 shows a section of a power circuit LS according to a second exemplary embodiment of the invention in a further schematic cross-sectional illustration.
- the power circuit LS shown in Figure 3 differs from the power circuit shown in Figures 1 and 2 above all in that the circuit section AB has a partial area in the form of a projection VS (or several projections) on which (or on which) the Contact surfaces KF1 of the power module LM are arranged.
- the protrusion VS (the protrusions protrude) protrudes in relation to the rest of the section AB in the direction of the control circuit board ST and through the recess AS of the control circuit board ST. Accordingly, the contact surfaces KF1 of the power module LM lie in the same plane as the upper side OS2 facing away from the power module LM or the contact surfaces KF2 of the control circuit board ST.
- the contacts of the bond connections BD on all bond pads or all contact surfaces KF1, KF2 can be at the same height realize, which additionally simplifies the bonding process.
- the distances or the bond wire lengths of the respective bond connections BD can also be reduced, which in turn has a positive effect on the parasitic inductance.
- This embodiment shown in FIG. 3 is particularly well suited when a greater distance is required between the power module LM and the control circuit board ST, especially when the control circuit board ST is also populated on both sides, i.e. also on an upper side OS3 facing the power module LM is and must therefore be arranged at a correspondingly greater distance from the power module LM.
- FIG. 4 shows a section of a power circuit LS according to a third exemplary embodiment of the invention in a further schematic cross-sectional illustration.
- the power circuit LS shown in FIG. 4 differs from the power circuit shown in FIGS. 1 and 2 primarily in that the circuit section AB has a sub-area (or several sub-areas) in the form of a depression VT (or depressions) in which ( or in which) the contact surfaces KF1 of the power module LM are arranged.
- the depression VT (or the depressions are) in the form of formed an edge-enclosed blind hole and has the contact surfaces KF1 on the bottom of the blind hole.
- press-fit areas can be provided in the contact surfaces KF1 of the power module LM, which can be encapsulated or encapsulated by the molding or spraying compound for sealing purposes.
- the power connections can be implemented by means of a plug-in connection with a socket on the power module side and a plug on the control circuit board side.
- the power circuit LS shown in FIG. 5 is similar to the power circuit shown in FIG. 3 with regard to the contact areas KF1 of the power module LM.
- the circuit section AB of the power circuit LS shown in FIG. 5 has a partial area in the form of a projection VS on which the contact surfaces KF1 of the power module LM are arranged.
- the projection VS protrudes in relation to the rest of the section AB in the direction of the control circuit board ST and extends to the top side OS3 of the control circuit board ST facing the power module LM.
- the contact surfaces KF1 of the power module LM are (approximately) in the same plane as the upper side OS3 of the control circuit board ST facing the power module LM.
- copper is used as the material of the contact surfaces KF1 of the power module LM.
- the control circuit board ST has deposits (in English "Inlays") in the form of
- the inserts have corresponding contact surfaces KF2 on the respective sections protruding into the recess AS, which correspond to the respective contact surfaces KF1 of the power module LM.
- the contact surfaces KF2 of the respective inserts and thus of the control circuit board ST are (approximately) in the same plane as the upper side OS3 of the control circuit board ST facing the power module LM and thus touch the respective corresponding contact surfaces KF1 of the power module LM.
- the copper material of the inserts is heated in a defined manner, so that a predetermined amount of copper liquefies and occurs on the contact surfaces KF1 of the power module LM (also made of copper) and is thus integrally connected to the contact surfaces KF1 of the power module LM.
- the contact surfaces KF1 of the power module LM also made of copper
- low-inductance current connections are produced between the power module LM and the control circuit board ST.
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Inverter Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021208497.4A DE102021208497A1 (de) | 2021-08-05 | 2021-08-05 | Leistungsschaltung |
| PCT/EP2022/071623 WO2023012136A1 (de) | 2021-08-05 | 2022-08-02 | Leistungsschaltung und verfahren zum herstellen einer leistungsschaltung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4381909A1 true EP4381909A1 (de) | 2024-06-12 |
Family
ID=83080876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22760714.0A Pending EP4381909A1 (de) | 2021-08-05 | 2022-08-02 | Leistungsschaltung und verfahren zum herstellen einer leistungsschaltung |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4381909A1 (de) |
| DE (1) | DE102021208497A1 (de) |
| WO (1) | WO2023012136A1 (de) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005053974B3 (de) | 2005-11-11 | 2007-03-01 | Siemens Ag | Elektronische Schaltungsanordnung und Verfahren zur Herstellung einer elektronischen Schaltungsanordnung |
| DE202009016531U1 (de) | 2009-12-04 | 2011-04-14 | Liebherr-Elektronik Gmbh | Leistungselektronische Baugruppe und Wechselrichteranordnung |
| US9006031B2 (en) | 2011-06-23 | 2015-04-14 | Stats Chippac, Ltd. | Semiconductor device and method of forming EWLB package with standoff conductive layer over encapsulant bumps |
| DE102013219833B4 (de) | 2013-09-30 | 2020-02-13 | Infineon Technologies Ag | Halbleitermodul mit leiterplatte und vefahren zur hertellung eines halbleitermoduls mit einer leiterplatte |
| EP3217774B1 (de) * | 2016-03-08 | 2018-06-13 | ABB Schweiz AG | Halbleitermodul |
| DE102019217186A1 (de) | 2019-11-07 | 2021-05-12 | Robert Bosch Gmbh | Elektronische Baugruppe, insbesondere eine elektronische Leistungsbaugruppe für Hybridfahrzeuge oder Elektrofahrzeuge |
-
2021
- 2021-08-05 DE DE102021208497.4A patent/DE102021208497A1/de active Pending
-
2022
- 2022-08-02 WO PCT/EP2022/071623 patent/WO2023012136A1/de not_active Ceased
- 2022-08-02 EP EP22760714.0A patent/EP4381909A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102021208497A1 (de) | 2023-02-09 |
| WO2023012136A1 (de) | 2023-02-09 |
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