WO2022176690A1 - 半導体装置、半導体装置の設計方法および半導体装置の製造方法 - Google Patents
半導体装置、半導体装置の設計方法および半導体装置の製造方法 Download PDFInfo
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Definitions
- the present disclosure relates to semiconductor devices.
- the present disclosure also relates to a method for designing a semiconductor device and a method for manufacturing a semiconductor device.
- inverter devices have been used in electric vehicles (including hybrid vehicles) and home appliances.
- an inverter device includes a semiconductor device and a switching element such as an IGBT (Insulated Gate Bipolar Transistor) or a MOSFET (Metal Oxide Semiconductor Field Effect Transistor).
- the semiconductor device has a control element and a driving element.
- a control signal output from an ECU (Engine Control Unit) is input to a control element of the semiconductor device.
- the control element converts the control signal into a PWM (Pulse Width Modulation) control signal and transmits it to the driving element.
- the driving element drives, for example, six switching elements at desired timing based on the PWM control signal.
- the three-phase AC power for driving the motor is generated from the DC power of the vehicle-mounted battery.
- a power supply voltage supplied to the control element may be a low voltage (approximately 5V), whereas a power supply voltage supplied to the drive element may be a high voltage (approximately 600V or higher).
- Insulating elements are used as means for transmitting signals between a plurality of elements having different power supply voltages.
- Patent Literature 1 discloses an example of a semiconductor device (intelligent power module) including an insulating element.
- the intelligent power module described in Patent Document 1 includes a control circuit, an arm circuit (upper arm or lower arm), and an isolation transformer.
- the control circuit is composed of a CPU, a logic IC, or a system LSI equipped with a logic IC and a CPU.
- the arm circuit is provided with a gate driver IC.
- the isolation transformer transmits signals between the control circuit and the arm circuit in an isolated state.
- the CPU of the control circuit generates a gate drive PWM signal that instructs the conduction or non-conduction of the switching element, and transmits this gate drive PWM signal to the gate driver IC of the arm circuit via the isolation transformer.
- the gate driver IC generates a gate signal based on the PWM signal for gate drive, and drives the control terminal of the switching element to switch the switching element.
- a plurality of elements with different power supply voltages may be mounted in one package, and in this case, a relatively high voltage part and a relatively low voltage part coexist in one package.
- dielectric breakdown may occur.
- dielectric breakdown tends to occur more easily as the potential difference between power supply voltages increases. Occurrence of dielectric breakdown is a cause of failure of the semiconductor device and lowers the reliability of the semiconductor device.
- one object of the present disclosure is to provide a semiconductor device capable of suppressing the occurrence of dielectric breakdown.
- Another object of the present disclosure is to provide a method for designing a semiconductor device and a method for manufacturing the semiconductor device capable of suppressing the occurrence of dielectric breakdown.
- a semiconductor device provided by a first aspect of the present disclosure includes a first semiconductor element, a second semiconductor element, and first semiconductor elements arranged apart from each other in a first direction orthogonal to a thickness direction of the first semiconductor element.
- a conductive support including one lead and a second lead; supported by the conductive support and electrically connected to the first semiconductor element and the second semiconductor element; a third semiconductor element that insulates two semiconductor elements from each other; and a sealing resin that covers the first semiconductor element, the second semiconductor element, the third semiconductor element, and a portion of the conductive support.
- the first semiconductor element is supported by the first leads, and the second semiconductor element is supported by the second leads.
- a distance d1 in the first direction between the first lead and the second lead is greater than the distance d0 determined by equation (1).
- Y is the insulation life years [years] required for the semiconductor device
- a and B are constants determined by the material of the sealing resin
- X is the voltage [kVrms] (kilovolt root mean square
- a first semiconductor element, a second semiconductor element, and a first lead and a first lead spaced apart from each other in a first direction perpendicular to the thickness direction of the first semiconductor element a conductive support including two leads, supported by the conductive support, electrically connected to the first semiconductor element and the second semiconductor element, and connecting the first semiconductor element and the second semiconductor element; a third semiconductor element that is insulated from each other; and a sealing resin that covers the first semiconductor element, the second semiconductor element, the third semiconductor element, and a portion of the conductive support, wherein the first semiconductor
- a method for designing a semiconductor device is provided in which an element is supported by the first leads and the second semiconductor element is supported by the second leads.
- the design method includes first design processing for designing such that the distance d1 between the first lead and the second lead in the first direction is greater than the distance d0 determined by equation (2).
- Y is the insulation lifetime [years] required for the semiconductor device
- a and B are constants determined by the material of the sealing resin
- X is the voltage [kVrms].
- a third aspect of the present disclosure provides a method of manufacturing a semiconductor device designed according to the second aspect.
- FIG. 1 is a plan view showing a semiconductor device according to a first embodiment
- FIG. FIG. 2 is a diagram showing a sealing resin with imaginary lines in the plan view of FIG. 1
- 1 is a front view showing a semiconductor device according to a first embodiment
- FIG. 1 is a left side view showing the semiconductor device according to the first embodiment
- FIG. 1 is a right side view showing the semiconductor device according to the first embodiment
- FIG. 3 is a cross-sectional view taken along line VI-VI of FIG. 2
- FIG. 7 is an enlarged cross-sectional view of a part of FIG. 6
- FIG. 3 is a cross-sectional view along line VIII-VIII of FIG.
- FIG. 10 is a plan view showing one step of the manufacturing method shown in FIG. 9;
- FIG. 10 is a plan view showing one step of the manufacturing method shown in FIG. 9;
- FIG. 10 is a plan view showing one step of the manufacturing method shown in FIG. 9;
- FIG. 10 is a plan view showing one step of the manufacturing method shown in FIG. 9;
- FIG. 10 is a plan view showing one step of the manufacturing method shown in FIG. 9;
- FIG. 10 is a cross-sectional view showing one step of the manufacturing method shown in FIG. 9; It is a top view which shows the semiconductor device concerning 2nd Embodiment.
- FIG. 10 is a plan view showing one step of the manufacturing method shown in FIG. 9;
- FIG. 10 is a plan view showing one step of the manufacturing method shown in FIG. 9;
- FIG. 10 is a plan view showing one step of the manufacturing method shown in FIG. 9;
- FIG. 10 is a plan view showing one step of the manufacturing method shown in FIG. 9;
- It is
- FIG. 17 is a cross-sectional view along line XVII-XVII of FIG. 16;
- FIG. 18 is an enlarged cross-sectional view of a part of FIG. 17;
- 9 is a flow chart showing an example of a method for manufacturing a semiconductor device according to a second embodiment;
- FIG. 20 is a plan view showing one step of the manufacturing method shown in FIG. 19;
- FIG. 20 is a plan view showing one step of the manufacturing method shown in FIG. 19;
- FIG. 20 is a plan view showing one step of the manufacturing method shown in FIG. 19;
- 20 is a cross-sectional view showing one step of the manufacturing method shown in FIG. 19;
- FIG. 19 is a cross-sectional view showing one step of the manufacturing method shown in FIG. 19;
- the semiconductor device A1 includes a first semiconductor element 11, a second semiconductor element 12, a third semiconductor element 13, a conductive support 3, a plurality of connection members 4, and a sealing resin 5.
- FIG. The conductive support 3 has a first lead 31, a second lead 32, a plurality of third leads 33 and a plurality of fourth leads 34, and the plurality of connecting members 4 are composed of a plurality of first wires 41, a plurality of first wires 41 and a plurality of fourth leads 34.
- FIG. 1 is a plan view showing the semiconductor device A1.
- FIG. 2 is a diagram showing the encapsulating resin 5 by an imaginary line (chain double-dashed line) in the plan view of FIG.
- FIG. 3 is a front view showing the semiconductor device A1.
- FIG. 4 is a left side view showing the semiconductor device A1.
- FIG. 5 is a right side view showing the semiconductor device A1.
- FIG. 6 is a cross-sectional view taken along line VI-VI of FIG.
- FIG. 7 is an enlarged cross-sectional view of a part of FIG. 6 .
- FIG. 8 is a cross-sectional view along line VIII-VIII of FIG.
- the thickness direction of each of the first semiconductor element 11, the second semiconductor element 12, the third semiconductor element 13, and the conductive support 3 is called "thickness direction z".
- plane view means when viewed along the thickness direction z.
- One direction perpendicular to the thickness direction z is called a "first direction x”.
- the first direction x is the horizontal direction in the plan view (see FIG. 1) of the semiconductor device A1.
- a direction orthogonal to both the thickness direction z and the first direction x is called a "second direction y".
- the second direction y is the vertical direction in the plan view (see FIG. 1) of the semiconductor device A1.
- the semiconductor device A1 is surface-mounted on a wiring board of an inverter device such as an electric vehicle (including a hybrid vehicle).
- the semiconductor device A1 controls switching operations of switching elements such as IGBTs or MOSFETs.
- the package format of the semiconductor device A1 is SOP (Small Outline Package), as understood from FIGS. 1 and 3 to 5.
- the package format of the semiconductor device A1 is not limited to SOP.
- the first semiconductor element 11, the second semiconductor element 12, and the third semiconductor element 13 are elements that serve as functional centers of the semiconductor device A1.
- Each of the first semiconductor element 11, the second semiconductor element 12 and the third semiconductor element 13 is composed of individual elements.
- the third semiconductor element 13 is positioned between the first semiconductor element 11 and the second semiconductor element 12 in the first direction x. When viewed along the thickness direction z, each of the first semiconductor element 11, the second semiconductor element 12, and the third semiconductor element 13 has a rectangular shape with the long side extending in the second direction y.
- the first semiconductor element 11 is a gate driver controller (control element) that drives switching elements such as IGBTs and MOSFETs.
- the first semiconductor element 11 includes a circuit for converting a control signal input from an ECU or the like into a PWM control signal, a transmission circuit for transmitting the PWM control signal to the third semiconductor element 13, a receiving circuit for receiving the electrical signal of
- the first semiconductor element 11 has a main surface 11a and a back surface 11b, as shown in FIG.
- the main surface 11a and the back surface 11b are spaced apart in the thickness direction z.
- the main surface 11 a is the upper surface of the first semiconductor element 11 and the back surface 11 b is the lower surface of the first semiconductor element 11 .
- the back surface 11 b faces the first lead 31 .
- the first semiconductor element 11 has a plurality of pads 111.
- the plurality of pads 111 are provided on the main surface 11a (the surface facing the same direction as the first mounting surface 311a of the first island portion 311 of the first lead 31, which will be described later).
- Each composition of the plurality of pads 111 includes, for example, aluminum (Al). That is, each pad 111 contains aluminum.
- the second semiconductor element 12 is a gate driver (driving element) for driving the switching element.
- the second semiconductor element 12 includes a receiving circuit for receiving a PWM control signal, a circuit for driving the switching element based on the PWM control signal, a transmitting circuit for transmitting an electrical signal to the first semiconductor element 11, have The electric signal is, for example, an output signal from a temperature sensor arranged near the motor.
- the second semiconductor element 12 has a main surface 12a and a back surface 12b, as shown in FIG.
- the main surface 12a and the back surface 12b are spaced apart in the thickness direction z.
- the main surface 12 a is the upper surface of the second semiconductor element 12 and the back surface 12 b is the lower surface of the second semiconductor element 12 .
- the back surface 12 b faces the second lead 32 .
- the second semiconductor element 12 has multiple pads 121 .
- the plurality of pads 121 are provided on the main surface 12a (the surface facing the same direction as the second mounting surface 321a of the second island portion 321 of the second lead 32, which will be described later).
- Each composition of the plurality of pads 121 contains, for example, aluminum.
- the third semiconductor element 13 is an element (insulating element) for transmitting PWM control signals and other electrical signals in an insulated state.
- the third semiconductor element 13 is of inductive type.
- An example of the inductive third semiconductor element 13 is an isolation transformer.
- An isolation transformer performs electrical signal transmission in an insulated state by inductively coupling two inductors (a primary coil and a secondary coil).
- the third semiconductor element 13 has a substrate made of silicon.
- Two inductors made of copper (Cu) are formed on the substrate.
- the inductor includes a primary coil and a secondary coil, which are stacked in the thickness direction z.
- a dielectric layer made of silicon dioxide (SiO2) or the like is interposed between the primary coil and the secondary coil. The dielectric layer electrically insulates the primary coil from the secondary coil.
- the structure of the third semiconductor element 13 is not limited to the example described above.
- the third semiconductor element 13 may be of a capacitive type.
- a capacitor is an example of the capacitive third semiconductor element 13 .
- the third semiconductor element 13 may be a photocoupler.
- the third semiconductor element 13 has a main surface 13a and a back surface 13b, as shown in FIGS.
- the main surface 13a and the back surface 13b are spaced apart in the thickness direction z.
- the main surface 13 a is the upper surface of the third semiconductor element 13 and the back surface 13 b is the lower surface of the third semiconductor element 13 .
- the rear surface 13 b faces the first lead 31 .
- the third semiconductor element 13 has a plurality of pads 131 and 132.
- FIG. A plurality of pads 131 and 132 are provided on main surface 13a, respectively.
- Each composition of the plurality of pads 121 contains, for example, aluminum.
- Each pad 131 conducts to the primary coil and each pad 132 conducts to the secondary coil.
- Each composition of the plurality of pads 131, 132 contains, for example, aluminum.
- the third semiconductor element 13 includes a seal ring portion 133 .
- the seal ring portion 133 is formed along each of the four outer peripheries of the third semiconductor element 13 in plan view, and surrounds the outer periphery of the circuit formation region. Seal ring portion 133 is made of, for example, copper (Cu), aluminum (Al), or the like.
- the second semiconductor element 12 requires a higher power supply voltage than the first semiconductor element 11 requires. Therefore, a potential difference is generated between the first semiconductor element 11 and the second semiconductor element 12 . Therefore, the first circuit including the first semiconductor element 11 as a component and the second circuit including the second semiconductor element 12 as a component are insulated from each other by the third semiconductor element 13 .
- the components of the first circuit include a first lead 31, a plurality of third leads 33, a plurality of first wires 41, a plurality of third wires 43 and a plurality of fifth wires 45. include.
- the components of the second circuit include a second lead 32, a plurality of fourth leads 34, a plurality of second wires 42, a plurality of fourth wires 44, and a plurality of sixth wires 46. include.
- the potentials of the first circuit and the second circuit are relatively different. In the semiconductor device A1, the potential of the second circuit is higher than the potential of the first circuit.
- the third semiconductor element 13 relays mutual signals between the first circuit and the second circuit.
- the voltage applied to the ground of the first semiconductor element 11 is approximately 0 V
- the voltage applied to the ground of the second semiconductor element 12 is transiently 600 V. It may be more than that.
- the voltage applied to the ground of the second semiconductor element 12 may be 3750V or higher.
- the conductive support 3 constitutes a conductive path between the first semiconductor element 11, the second semiconductor element 12, the third semiconductor element 13, and the wiring board on which the semiconductor device A1 is mounted.
- the conducting supports 3 are obtained, for example, from the same lead frame, as will be detailed later.
- the lead frame is made of, for example, copper or a copper alloy, but may be made of other metallic materials.
- the conductive support 3 has a first lead 31, a second lead 32, a plurality of third leads 33 and a plurality of fourth leads 34, as described above.
- the first lead 31 and the second lead 32 are positioned apart from each other in the first direction x, as shown in FIGS.
- the first semiconductor element 11 and the third semiconductor element 13 are mounted on the first lead 31, and the second semiconductor element 12 is mounted on the second lead 32.
- the semiconductor device A1 the first semiconductor element 11 and the third semiconductor element 13 are mounted on the first lead 31, and the second semiconductor element 12 is mounted on the second lead 32.
- the first lead 31 includes a first island portion 311 and two first terminal portions 312, as shown in FIG.
- the first island portion 311 has a first mounting surface 311a facing one side (upward) in the thickness direction z.
- First semiconductor element 11 and third semiconductor element 13 are bonded to first mounting surface 311a via a conductive bonding material (eg, solder, metal paste, sintered metal, etc.) (not shown).
- the first island portion 311 is covered with the sealing resin 5 .
- the first island portion 311 has a rectangular shape in plan view.
- the thickness of first island portion 311 is, for example, 100 ⁇ m or more and 300 ⁇ m or less.
- a plurality of through holes 313 are formed in the first island portion 311 .
- Each of the plurality of through holes 313 penetrates the first island portion 311 in the thickness direction z and extends along the second direction y.
- At least one of the plurality of through holes 313 is located between the first semiconductor element 11 and the third semiconductor element 13 in plan view.
- the plurality of through holes 313 are arranged along the second direction y. Unlike the illustrated example, the plurality of through holes 313 may not be formed in the first island portion 311 .
- the two first terminal portions 312 extend from both sides of the first island portion 311 in the second direction y.
- the two first terminal portions 312 are positioned apart from each other in the second direction y. At least one of the two first terminal portions 312 is electrically connected to the ground of the first semiconductor element 11 via the fifth wire 45 .
- Each of the two first terminal portions 312 has a covering portion 312a and an exposed portion 312b.
- the covering portion 312 a is connected to the first island portion 311 and covered with the sealing resin 5 .
- the exposed portion 312 b is connected to the covered portion 312 a and exposed from the sealing resin 5 .
- the exposed portion 312b extends along the first direction x. As shown in FIG. 3, the exposed portion 312b is bent in a gull-wing shape when viewed along the second direction y.
- the surface of exposed portion 312b may be plated with tin (Sn), for example.
- the second lead 32 has a second island portion 321 and two second terminal portions 322, as shown in FIG.
- the second island portion 321 has a second mounting surface 321a facing one side (upward) in the thickness direction z.
- the second semiconductor element 12 is bonded to the second mounting surface 321a via a conductive bonding material (eg solder, metal paste, sintered metal, etc.) not shown.
- the second island portion 321 is covered with the sealing resin 5 .
- the second island portion 321 has a rectangular shape in plan view.
- the thickness of second island portion 321 is, for example, 100 ⁇ m or more and 300 ⁇ m or less, like first island portion 311 .
- the two second terminal portions 322 extend from both sides of the second island portion 321 in the second direction y.
- the two second terminal portions 322 are separated from each other in the second direction y.
- At least one of the two second terminal portions 322 is electrically connected to the ground of the second semiconductor element 12 via the sixth wire 46 .
- Each of the two second terminal portions 322 has a covered portion 322a and an exposed portion 322b.
- the covering portion 322 a is connected to the second island portion 321 and covered with the sealing resin 5 .
- the exposed portion 322 b is connected to the covered portion 322 a and exposed from the sealing resin 5 .
- the exposed portion 322b extends along the first direction x.
- the exposed portion 322b is bent in a gull-wing shape when viewed along the second direction y.
- the surface of the exposed portion 322b may be plated with tin, for example.
- the plurality of third leads 33 are opposite to the second island portions 321 of the second leads 32 with respect to the first island portions 311 of the first leads 31 in the first direction x, as shown in FIGS. located on the side.
- the multiple third leads 33 are arranged along the second direction y. At least one of the plurality of third leads 33 is electrically connected to the first semiconductor element 11 via the second wire 42 .
- the multiple third leads 33 include multiple intermediate leads 33A and two side leads 33B. Each of the two side leads 33B is positioned between one of the two first terminal portions 312 of the first lead 31 and the intermediate lead 33A positioned closest to the first terminal portion 312 in the second direction y. do.
- the multiple third leads 33 each have a covered portion 331 and an exposed portion 332.
- the covering portion 331 is covered with the sealing resin 5 .
- the dimension in the first direction x of each covering portion 331 of the two side leads 33B is larger than the dimension in the first direction x of each covering portion 331 of the plurality of intermediate leads 33A.
- the exposed portion 332 is connected to the covering portion 331 and exposed from the sealing resin 5 . In plan view, the exposed portion 332 extends along the first direction x.
- the exposed portion 332 is bent in a gull-wing shape when viewed along the second direction y.
- the shape of the exposed portion 332 is equal to the shape of the exposed portion 312 b of each first terminal portion 312 of the first lead 31 .
- the surface of the exposed portion 332 may be plated with tin, for example.
- the plurality of fourth leads 34 are located on the opposite side of the plurality of third leads 33 with respect to the first island portion 311 of the first lead 31 in the first direction x, as shown in FIGS. .
- the multiple fourth leads 34 are arranged along the second direction y. At least one of the plurality of fourth leads 34 is electrically connected to the second semiconductor element 12 via the fourth wire 44 .
- the multiple fourth leads 34 include multiple intermediate leads 34A and two side leads 34B.
- the two side leads 34B are positioned on both sides of the plurality of intermediate leads 34A in the second direction y. Either of the two second terminal portions 322 of the second lead 32 is located between one of the two side leads 34B and the intermediate lead 34A located closest to the side lead 34B in the second direction y. To position.
- the multiple fourth leads 34 each have a covered portion 341 and an exposed portion 342.
- the covering portion 341 is covered with the sealing resin 5 .
- the dimension in the first direction x of each covering portion 341 of the two side leads 34B is larger than the dimension in the first direction x of each covering portion 341 of the plurality of intermediate leads 34A.
- the exposed portion 342 is connected to the covering portion 341 and exposed from the sealing resin 5 . In plan view, the exposed portion 342 extends along the first direction x. As shown in FIG.
- the exposed portion 342 is bent in a gull-wing shape when viewed along the second direction y.
- the shape of the exposed portion 342 is equal to the shape of each exposed portion 322 b of the two second terminal portions 322 of the second lead 32 .
- the surface of the exposed portion 342 may be plated with tin, for example.
- Each of the plurality of connecting members 4 conducts between two parts separated from each other.
- the plurality of connecting members 4 includes the plurality of first wires 41, the plurality of second wires 42, the plurality of third wires 43, the plurality of fourth wires 44, the plurality of fifth wires 45 and the plurality of sixth wires. Includes wire 46 .
- the plurality of first wires 41, the plurality of second wires 42, the plurality of third wires 43, the plurality of fourth wires 44, the plurality of fifth wires 45, and the plurality of sixth wires 46 are each made of a metal material.
- Metal materials include, for example, either gold, copper, or aluminum.
- the plurality of connecting members 4 are not the plurality of first wires 41, the plurality of second wires 42, the plurality of third wires 43, the plurality of fourth wires 44, the plurality of fifth wires 45 and the plurality of sixth wires 46. , a bonding ribbon, or a plate-like metal member.
- Each of the plurality of first wires 41 is joined to one of the plurality of pads 111 of the first semiconductor element 11 and one of the plurality of pads 131 of the third semiconductor element 13, as shown in FIG.
- Each first wire 41 electrically connects the first semiconductor element 11 and the third semiconductor element 13 .
- the multiple first wires 41 are arranged along the second direction y.
- each of the plurality of first wires 41 includes a neck portion 411, a joint portion 412 and a loop portion 413.
- a neck portion 411 is a portion that is joined to one of the plurality of pads 131 and extends in the thickness direction z.
- the joint portion 412 is a portion joined to any one of the plurality of pads 111 .
- the loop portion 413 is a portion that connects the neck portion 411 and the joint portion 412 .
- the loop portion 413 extends from the neck portion 411 toward the joint portion 412 while curving.
- Each of the plurality of second wires 42 is joined to one of the plurality of pads 121 of the second semiconductor element 12 and one of the plurality of pads 132 of the third semiconductor element 13, as shown in FIG.
- Each second wire 42 electrically connects the second semiconductor element 12 and the third semiconductor element 13 .
- the multiple second wires 42 are arranged along the second direction y.
- Each of the plurality of second wires 42 straddles between the first island portion 311 of the first lead 31 and the second island portion 321 of the second lead 32 .
- each of the plurality of second wires 42 includes a neck portion 421, a joint portion 422 and a loop portion 423.
- the neck portion 421 is a portion that is joined to one of the plurality of pads 132 and extends in the thickness direction z.
- the joint portion 422 is a portion joined to one of the pads 121 .
- the loop portion 423 is a portion that connects the neck portion 421 and the joint portion 422 .
- the loop portion 423 extends from the neck portion 421 toward the joint portion 422 while being curved.
- Each of the plurality of third wires 43 is joined to one of the plurality of pads 111 of the first semiconductor element 11 and one of the covering portions 331 of the plurality of third leads 33, as shown in FIG.
- Each third wire 43 electrically connects the first semiconductor element 11 and one of the plurality of third leads 33 .
- Each of the plurality of fourth wires 44 is joined to one of the plurality of pads 121 of the second semiconductor element 12 and one of the covering portions 341 of the plurality of fourth leads 34, as shown in FIG.
- Each fourth wire 44 conducts between the second semiconductor element 12 and one of the plurality of fourth leads 34 .
- Each of the plurality of fifth wires 45 is joined to one of the plurality of pads 111 of the first semiconductor element 11 and one of the covering portions 312a of the two first terminal portions 312, as shown in FIG. .
- Each fifth wire 45 electrically connects the first semiconductor element 11 and the first lead 31 .
- Each of the plurality of sixth wires 46 is joined to one of the plurality of pads 121 of the second semiconductor element 12 and one of the covering portions 322a of the two second terminal portions 322, as shown in FIG. .
- Each sixth wire 46 electrically connects the second semiconductor element 12 and the second lead 32 .
- the sealing resin 5 covers the first semiconductor element 11, the second semiconductor element 12 and the third semiconductor element 13, a portion of the conductive support 3, and the plurality of connection members 4. there is
- the sealing resin 5 has electrical insulation.
- the sealing resin 5 insulates the components of the first circuit (eg, first lead 31) and the components of the second circuit (eg, second lead 32) from each other.
- Sealing resin 5 is made of a material containing, for example, black epoxy resin. In the illustrated example, the sealing resin 5 has a rectangular shape in plan view.
- the sealing resin 5 has a top surface 51, a bottom surface 52, a pair of first side surfaces 53, and a pair of second side surfaces .
- top surface 51 and the bottom surface 52 are positioned apart from each other in the thickness direction z.
- the top surface 51 and the bottom surface 52 face opposite sides in the thickness direction z.
- Each of top surface 51 and bottom surface 52 is flat (or substantially flat).
- the pair of first side surfaces 53 are connected to the top surface 51 and the bottom surface 52 and are separated from each other in the first direction x.
- the exposed portions 312b of the two first terminal portions 312 (first leads 31) and the plurality of third leads are exposed from the first side surface 53 located on one side in the first direction x among the pair of first side surfaces 53. 33 are exposed.
- the exposed portions 322b of the two second terminal portions 322 (second leads 32) and the plurality of fourth leads 34 are exposed.
- Each of the pair of first side surfaces 53 includes a first upper portion 531, a first lower portion 532 and a first intermediate portion 533, as shown in FIGS.
- One side of the first upper portion 531 in the thickness direction z is connected to the top surface 51 , and the other side in the thickness direction z is connected to the first intermediate portion 533 .
- the first upper portion 531 is inclined with respect to the top surface 51 .
- One side of the first lower portion 532 in the thickness direction z is connected to the bottom surface 52 , and the other side in the thickness direction z is connected to the first intermediate portion 533 .
- the first lower portion 532 is inclined with respect to the bottom surface 52 .
- first intermediate portion 533 in the thickness direction z is connected to the first upper portion 531 , and the other side in the thickness direction z is connected to the first lower portion 532 .
- the in-plane directions of the first intermediate portion 533 are the thickness direction z and the second direction y.
- the first intermediate portion 533 is located outside the top surface 51 and the bottom surface 52 . From the first intermediate portion 533 of the pair of first side surfaces 53, each exposed portion 312b of the two first terminal portions 312 (first leads 31) and each exposed portion of the two second terminal portions 322 (second leads 32) are exposed. The portion 322b, the exposed portions 332 of the plurality of third leads 33, and the exposed portions 342 of the plurality of fourth leads 34 are exposed.
- the pair of second side surfaces 54 are connected to the top surface 51 and the bottom surface 52 and are separated from each other in the second direction y.
- the first lead 31 , the second lead 32 , the plurality of third leads 33 and the plurality of fourth leads 34 are positioned away from the pair of second side surfaces 54 .
- each of the pair of second side surfaces 54 includes a second upper portion 541, a second lower portion 542 and a second intermediate portion 543.
- One side of the second upper portion 541 in the thickness direction z is connected to the top surface 51 , and the other side in the thickness direction z is connected to the second intermediate portion 543 .
- the second upper portion 541 is inclined with respect to the top surface 51 .
- One side of the second lower portion 542 in the thickness direction z is connected to the bottom surface 52 , and the other side in the thickness direction z is connected to the second intermediate portion 543 .
- the second lower portion 542 is inclined with respect to the bottom surface 52 .
- the second intermediate portion 543 has one side in the thickness direction z connected to the second upper portion 541 and the other side in the thickness direction z connected to the second lower portion 542 .
- the in-plane directions of the second intermediate portion 543 are the thickness direction z and the second direction y. In plan view, the second intermediate portion 543 is located outside the top surface 51 and the bottom surface 52 .
- a half-bridge circuit including a low-side (low-potential side) switching element and a high-side (high-potential side) switching element.
- these switching elements are MOSFETs.
- the low-side switching element both the source of the switching element and the reference potential of the gate driver that drives the switching element are grounded.
- both the reference potential of the source of the switching element and the reference potential of the gate driver that drives the switching element correspond to the potential at the output node of the half bridge circuit.
- the reference potential of the gate driver that drives the high-side switching element changes.
- the reference potential is equivalent to the voltage applied to the drain of the high-side switching element (for example, 600V or higher).
- the semiconductor device A1 the ground of the first semiconductor element 11 and the ground of the second semiconductor element 12 are separated. Therefore, when the semiconductor device A1 is used as a gate driver for driving the high-side switching element, a transient voltage equivalent to the voltage applied to the drain of the high-side switching element is applied to the ground of the second semiconductor element 12. applied
- the components of the first circuit and the components of the second circuit are arranged so as to be larger than the distance d0 [mm] determined by the following equation (3).
- Y is the number of years of insulation life required for the semiconductor device A1
- a and B are constants determined by the material of the sealing resin 5, and X is used in the semiconductor device A1.
- Voltage X is the difference between the voltage applied to the first circuit and the voltage applied to the second circuit.
- an AC voltage is generated by driving the switching element, and the effective value is used for the voltage X.
- the sealing resin 5 is an epoxy resin
- the constant A is 1000 ⁇ 416 and the constant B is 16 .
- 0.15 is an offset value for calculating the distance d0.
- the distance d0 increases as the voltage increases, increases as the insulation lifetime increases, and varies depending on the material of the sealing resin 5 .
- the distance d1 (see FIG. 7) between the first lead 31 and the second lead 32 in the first direction x is greater than the distance d0.
- the distance d1 is the distance at which the first island portion 311 and the second island portion 321 are closest to each other.
- the distance d1 is, for example, 10 mm or less. This can suppress an increase in size of the semiconductor device A1.
- the distance d1 is approximately 300 ⁇ m, which is larger than the distance d0 ( ⁇ 29.4 ⁇ m) illustrated above.
- the distance d2 (see FIG. 7) between each first wire 41 and each second wire 42 is greater than the distance d0.
- the distance d2 is the distance at which the neck portion 411 and the neck portion 421 are closest to each other.
- the distance d2 is, for example, 10 mm or less. This can suppress an increase in size of the semiconductor device A1.
- the distance d2 is approximately 300 ⁇ m, which is larger than the distance d0 ( ⁇ 29.4 ⁇ m) illustrated above.
- the distance d3 (see FIG. 7) between each second wire 42 and the third semiconductor element 13 is greater than the distance d0.
- the distance d3 is the distance in the thickness direction z of the portion where each loop portion 423 and the seal ring portion 133 of the third semiconductor element 13 are closest to each other.
- the distance d3 is, for example, 10 mm or less. This can suppress an increase in size of the semiconductor device A1.
- the distance d3' (see FIG. 7) between each second wire 42 and the first lead 31 is greater than the distance d0.
- the distance d3' is the distance in the thickness direction z of the portion where each loop portion 423 and the first mounting surface 311a of the first island portion 311 are closest to each other.
- the distance d3' is, for example, 10 mm or less. This can suppress an increase in size of the semiconductor device A1.
- FIG. 9 is a flow chart showing an example of a method for manufacturing the semiconductor device A1.
- 10 to 14 are plan views showing one step of the method of manufacturing the semiconductor device A1.
- FIG. 15 is a cross-sectional view showing one step of the method of manufacturing the semiconductor device A1. The cross-sectional position of FIG. 15 is the same as the cross-sectional position of FIG.
- the method of manufacturing the semiconductor device A1 includes a lead frame preparation step S11, a lead frame processing step S12, an element mounting step S13, a wire bonding step S14, a sealing step S15, and singulation. It has step S16.
- the manufacturing method of the semiconductor device A1 includes a design method having a design process.
- the design process includes a first design process S101, a second design process S102, and a third design process S103, which will be detailed later.
- the lead frame 81 shown in FIG. 10 is prepared.
- the lead frame 81 includes a flat plate portion 810, a plurality of support leads 811b and 812b, a plurality of leads 813 and 814, an outer frame 815 and dam bars 816, as shown in FIG.
- the lead frame 81 is formed, for example, by punching a rectangular copper plate in plan view.
- the support leads 811b and 812b are connected to the flat plate portion 810 respectively.
- the plurality of support leads 811b, 812b and the plurality of leads 813, 814 are connected by an outer frame 815 and a dam bar 816.
- Outer frame 815 and dam bar 816 of lead frame 81 do not constitute semiconductor device A1.
- the flat plate portion 810 of the leadframe 81 is divided into a first island 811a and a second island 812a (see FIG. 12).
- the flat plate portion 810 is divided into a first island 811a and a second island 812a, and a plurality of through holes 811c are formed in the flat plate portion 810 in the lead frame processing step S12.
- a resist 82 is formed on the lead frame 81 as shown in FIG. In FIG. 11, dots are drawn on the resist 82 .
- the lead frame 81 with the resist 82 formed thereon is subjected to an etching process.
- the lead frame 81 shown in FIG. 12 is formed.
- a plurality of support leads 811b are connected to a first island 811a, respectively, and the first lead 811 including the first island 811a and the plurality of support leads 811b is formed.
- the plurality of support leads 812b are respectively connected to the second islands 812a, and the second leads 812 including the second islands 812a and the plurality of support leads 812b are formed.
- the first design process S101 is performed in the lead frame processing step S12.
- the first island 811a first lead 811) and the second island 812a (second lead 812)
- the distance d1 (see FIGS. 12 and 15) in one direction x is designed to be larger than the distance d0.
- Distance d0 is determined by equation (3) above.
- the first island 811a first lead 811) becomes the first island portion 311 (first lead 31)
- the second island 812a second lead 812 becomes the second island portion 311 (first lead 31). 2 island portion 321 (second lead 32).
- the distance d1 between the first lead 31 and the second lead 32 in the first direction x is designed to be larger than the distance d0.
- the first semiconductor element 11, the second semiconductor element 12 and the third semiconductor element 13 are mounted on the lead frame 81 respectively.
- the first semiconductor element 11 and the third semiconductor element 13 are each bonded to the first island 811a by a conductive bonding material (not shown), and the second semiconductor element 12 is bonded to the second island 811a by a conductive bonding material (not shown). Bond to island 812a.
- the plurality of first wires 41, the plurality of second wires 42, the plurality of third wires 43, the plurality of fourth wires 44, the plurality of fifth wires A wire 45 and a plurality of sixth wires 46 are formed respectively.
- a known wire bonder may be used to form the wires 41 to 46 .
- the order in which the wires 41 to 46 are formed is not particularly limited.
- the second design process S102 and the third design process S103 are performed in the wire bonding process S14.
- the distance d2 between the first wires 41 and the second wires 42 is set to a value larger than the distance d0. design. For example, when each first wire 41 is wire-bonded prior to each second wire 42, the neck portion 421 of each second wire 42 is located closer to the neck portion 411 of each first wire 41 than the distance d0. Wire bond each second wire 42 apart. Conversely, when each second wire 42 is wire-bonded before each first wire 41, the neck portion 411 of each first wire 41 is positioned closer to the neck portion 421 of each second wire 42 than the distance d0. Each first wire 41 is wire-bonded so as to be separated from each other. In the second design process S102, it is preferable to design the distance d2 to be larger than the distance d0, for example, 10 mm or less, in order to suppress an increase in the size of the semiconductor device A1 to be manufactured.
- the distance d3 in the thickness direction z between each second wire 42 and the third semiconductor element 13 is designed to be larger than the distance d0.
- the distance d3' in the thickness direction z between each second wire 42 and the first lead 811 is designed to be larger than the distance d0.
- the loop portion 423 of each second wire 42 is separated from the seal ring portion 133 of the third semiconductor element 13 by more than the distance d0 and from the first island 811a by more than the distance d0. , wire-bond each second wire 42 .
- the first lead 811 becomes the first lead 31 as will be understood from the configuration described in detail later.
- the distance d3' in the thickness direction z between each second wire 42 and the first lead 31 is designed to be larger than the distance d0. ing.
- the distance d3 it is preferable to design the distance d3 to be, for example, 10 mm or less while being larger than the distance d0, in order to suppress the increase in size of the semiconductor device A1 to be manufactured.
- a sealing resin 5 is formed.
- the sealing resin 5 is formed by transfer molding.
- the formed sealing resin 5 is made of, for example, an epoxy resin.
- the singulation step S16 dicing is performed to singulate.
- the first lead 811, the second lead 812, and the plurality of leads 813 and 814, which are connected to each other by the outer frame 815 and the dam bar 816, are separated as appropriate.
- a first lead 31 is formed from the separated first lead 811 .
- the first island 811 a becomes the first island portion 311 and each support lead 811 b becomes each first terminal portion 312 .
- the second lead 32 is formed from the separated second lead 812 .
- the second island 812 a becomes the second island portion 321 and each support lead 812 b becomes each second terminal portion 322 .
- a plurality of third leads 33 are formed from the plurality of separated leads 813
- a plurality of fourth leads 34 are formed from the plurality of separated leads 814 .
- the bending of the plurality of third leads 33 (plurality of leads 813) and the plurality of fourth leads 34 (plurality of leads 814) may be performed in the singulation step S16, or may be performed in the lead frame preparation step S11. may be performed during the punching process.
- the semiconductor device A1 is manufactured.
- the method for manufacturing the semiconductor device A1 is not limited to the above example.
- the lead frame processing step S12 may be omitted by forming the first island 811a, the second island 812a, and the plurality of through holes 813c by punching in the lead frame preparation step S11.
- the first design process S101 is performed in the lead frame preparation process S11.
- the etching process in the lead frame processing step S12 is more accurate than the punching process in the lead frame preparation step S11, and the distance d1 is set to a value larger than the distance d0.
- a copper plate having a rectangular shape in a plan view is prepared, and in the lead frame processing step S12, the resist 82 is formed and the prepared copper plate is subjected to an etching treatment to form the first copper plate.
- a lead 811 (a first island 811a and a plurality of support leads 811b), a second lead 812 (a second island 812a and a plurality of support leads 812b), a plurality of leads 813 and 814, an outer frame 815 and a dam bar 816 are collectively formed.
- the effects of the semiconductor device A1, the method of designing the semiconductor device A1, and the method of manufacturing the semiconductor device A1 are as follows.
- the distance d1 between the first lead 31 and the second lead 32 in the first direction x is greater than the distance d0 determined by the above equation (3).
- the distance d0 is calculated from the insulation life years Y of the semiconductor device A1, the voltage X used in the semiconductor device A1, and the constant A determined by the material of the sealing resin 5, as described above. According to research conducted by the inventors of the present application, it was found that the above formula (3) enables the design of a withstand voltage that satisfies the conditions of actual use. Therefore, in the semiconductor device A1, by making the distance d1 larger than the distance d0, it is possible to design a withstand voltage that satisfies the actual usage conditions between the first lead 31 and the second lead 32.
- the semiconductor device A1 can ensure a proper dielectric breakdown voltage between the first lead 31 and the second lead 32, and can suppress the occurrence of dielectric breakdown. Further, in the design method of the semiconductor device A1, the distance d1 is designed to be larger than the distance d0 by the first design process S101. As a result, it is possible to design the semiconductor device A1 in which the occurrence of dielectric breakdown is suppressed, and to manufacture the semiconductor device A1.
- the distance d2 between the first wire 41 and the second wire 42 is larger than the distance d0 determined by the above equation (3).
- the distance d2 is the distance between the neck portion 411 of each first wire 41 and the neck portion 421 of each second wire 42 in the direction orthogonal to the thickness direction z.
- the first wire 41 is a component of the first circuit because it conducts to the first semiconductor element 11 .
- the second wire 42 is a component of the second circuit because it conducts to the second semiconductor element 12 . That is, the voltage of the first wire 41 is relatively low and the voltage of the second wire 42 is relatively high, so that a potential difference is generated between the first wire 41 and the second wire 42 .
- the semiconductor device A1 since the distance d2 is larger than the distance d0, it is possible to design a withstand voltage between the first wire 41 and the second wire 42 that satisfies the actual use conditions. Therefore, since the semiconductor device A1 can ensure a suitable dielectric breakdown voltage between the first wire 41 and the second wire 42, it is possible to suppress the occurrence of dielectric breakdown. Further, in the design method of the semiconductor device A1, the distance d2 is designed to be larger than the distance d0 by the second design process S102. As a result, it is possible to design the semiconductor device A1 in which the occurrence of dielectric breakdown is suppressed, and to manufacture the semiconductor device A1.
- the distance d3 between the second wire 42 and the third semiconductor element 13 is greater than the distance d0 determined by the above equation (3).
- the distance d3 is the distance in the thickness direction z between the loop portion 423 of each second wire 42 and the seal ring portion 133 of the third semiconductor element 13 .
- the second wire 42 is a component of the second circuit because it conducts to the second semiconductor element 12 .
- the seal ring portion 133 since the third semiconductor element 13 is bonded to the first island portion 311 (first lead 31 ), the seal ring portion 133 has the same potential as the first island portion 311 . In other words, the voltage of the second wire 42 is relatively high, and the voltage of the seal ring portion 133 is relatively low.
- the semiconductor device A1 since the distance d3 is larger than the distance d0, it is possible to design a dielectric strength voltage between the second wire 42 and the seal ring portion 133 that satisfies actual use conditions. Therefore, the semiconductor device A1 can ensure a suitable dielectric breakdown voltage between the second wire 42 and the third semiconductor element 13, and can suppress the occurrence of dielectric breakdown. Further, in the design method of the semiconductor device A1, the distance d3 is designed to be larger than the distance d0 by the third design process S103. As a result, it is possible to design the semiconductor device A1 in which the occurrence of dielectric breakdown is suppressed, and to manufacture the semiconductor device A1.
- the distance d3' between the second wire 42 and the first lead 31 is greater than the distance d0 determined by the above formula (3).
- the distance d3' is the distance in the thickness direction z between the loop portion 423 of each second wire 42 and the first mounting surface 311a of the first island portion 311 (first lead 31).
- the second wire 42 is a component of the second circuit because it conducts to the second semiconductor element 12 .
- the first lead 31 is a component of the first circuit. That is, the voltage of the second wire 42 is relatively high and the voltage of the first lead 31 is relatively low, so that a potential difference is generated between the second wire 42 and the first lead 31 .
- the semiconductor device A1 since the distance d3' is larger than the distance d0, it is possible to design a dielectric strength between the second wire 42 and the first lead 31 that satisfies the actual conditions of use. Therefore, the semiconductor device A1 can ensure a suitable dielectric breakdown voltage between the second wire 42 and the first lead 31, and can suppress the occurrence of dielectric breakdown. Further, in the design method of the semiconductor device A1, the distance d3' is designed to be larger than the distance d0 by the third design process S103. As a result, it is possible to design the semiconductor device A1 in which the occurrence of dielectric breakdown is suppressed, and to manufacture the semiconductor device A1.
- FIG. 16 to 18 show the semiconductor device A2 according to the second embodiment.
- FIG. 16 is a plan view showing the semiconductor device A2, showing the sealing resin 5 in imaginary lines.
- 17 is a cross-sectional view along line XVII-XVII of FIG. 16.
- FIG. 18 is an enlarged cross-sectional view of a part of FIG. 17 .
- the semiconductor device A2 differs from the semiconductor device A1 in that the third semiconductor element 13 is mounted on the second lead 32 instead of the first lead 31.
- FIG. The third semiconductor element 13 is bonded to the second island portion 321 of the second lead 32 via a conductive bonding material (not shown).
- the pads 131 are arranged inside the pads 132 in plan view.
- the component of the first circuit and the component of the second circuit are larger than the distance d0 [mm] determined by the above equation (3). are arranged so that
- the distance d1 (see FIG. 18) between the first lead 31 and the second lead 32 in the first direction x, and the distance d2 (see FIG. 18) between the first wire 41 and the second wire 42 are Each is greater than the distance d0 determined from equation (3) above.
- the distance d4 (see FIG. 18) between each first wire 41 and the third semiconductor element 13 is greater than the distance d0.
- the distance d4 is the distance in the thickness direction z of the portion where each loop portion 413 and the seal ring portion 133 of the third semiconductor element 13 are closest to each other.
- the distance d4 is, for example, 10 mm or less.
- the distance d4' (see FIG. 18) between each first wire 41 and the second lead 32 is greater than the distance d0.
- the distance d4' is the distance in the thickness direction z of the portion where each loop portion 413 and the second mounting surface 321a of the second island portion 321 are closest to each other.
- the distance d4' is, for example, 10 mm or less.
- FIG. 19 is a flow chart showing an example of a method for manufacturing the semiconductor device A2.
- 20 to 22 are plan views showing one step of the method of manufacturing the semiconductor device A2.
- FIG. 23 is a cross-sectional view showing one step of the method of manufacturing the semiconductor device A2. The cross-sectional position of FIG. 23 is the same as the cross-sectional position of FIG.
- the method of manufacturing the semiconductor device A2 includes a lead frame preparation step S21, a lead frame processing step S22, an element mounting step S23, a wire bonding step S24, a sealing step S25, and a singulation step S26. Also, the method of manufacturing the semiconductor device A2 includes a design method having a design process. The design process includes a first design process S101, a second design process S102, and a fourth design process S104 which will be detailed later.
- the lead frame 81 shown in FIG. 10 is prepared in the same manner as in the lead frame preparation step S11.
- the flat plate portion 810 of the lead frame 81 is divided into a first island 811a and a second island 812a (see FIG. 21), similarly to the lead frame processing step S12 in the first embodiment. .
- the formation region of the resist 82 is different from that in the lead frame processing step S12, as shown in FIG.
- the lead frame 81 shown in FIG. 21 is formed.
- the leadframe 81 shown in FIG. 21 has a first lead 811 including a first island 811a and a plurality of supporting leads 811b, and a second lead 812 including a second island 812a and a plurality of supporting leads 812b.
- the first design processing S101 is performed in the same manner as in the leadframe processing step S12.
- the first semiconductor element 11, the second semiconductor element 12 and the third semiconductor element 13 are mounted on the lead frame 81, respectively, as shown in FIG.
- the third semiconductor element 13 is mounted on the second island 812a (second leads 812).
- the plurality of first wires 41, the plurality of second wires 42, the plurality of third wires 43, the plurality of fourth wires 44, the plurality of fifth wires A wire 45 and a plurality of sixth wires 46 are formed respectively.
- the second design process S102 and the fourth design process S104 are performed in the wire bonding step S24.
- the fourth design process S104 is performed instead of the third design process S103, as compared with the wire bonding process S14.
- the distance d4 in the thickness direction z between each first wire 41 and the third semiconductor element 13 is designed to be larger than the distance d0.
- the distance d4' in the thickness direction z between each first wire 41 and the second lead 812 is designed to be larger than the distance d0.
- the loop portion 413 of each first wire 41 is separated from the seal ring portion 133 of the third semiconductor element 13 by more than the distance d0 and from the second island 812a by more than the distance d0. , wire bonding each first wire 41 .
- the pads 131 of the third semiconductor element 13 are located inside the pads 132 as described above, so that each first wire 131 is arranged so as to detour around each seal ring portion 133 . 41 wire bonding is possible.
- the second lead 812 becomes the second lead 32 as will be understood from the configuration described in detail later. Therefore, in the process of designing the distance d4' in the fourth design process S104, the distance d4' in the thickness direction z between each first wire 41 and the second lead 32 is designed to be larger than the distance d0. ing.
- the distance d4 it is preferable to design the distance d4 to be larger than the distance d0, for example, 10 mm or less, in order to suppress an increase in size of the semiconductor device A1 to be manufactured. Further, in the fourth design process S104, it is preferable to design the distance d4' to be larger than the distance d0, for example, 10 mm or less, in order to suppress an increase in the size of the semiconductor device A1 to be manufactured.
- the sealing resin 5 is formed in the same manner as in the sealing step S15.
- the sealing resin 5 is formed by transfer molding.
- singulation step S26 dicing is performed and singulation is performed in the same manner as in the singulation step S16.
- the semiconductor device A2 is manufactured through the steps described above.
- the first island 811a and the second island 812a may be formed in the lead frame preparation step S21.
- the lead frame preparation step S21 a rectangular copper plate in plan view is prepared, and in the lead frame processing step S22, a lead frame 81 having the shape shown in FIG. 12 is formed from the prepared copper plate. good.
- the effects of the semiconductor device A2, the method of designing the semiconductor device A2, and the method of manufacturing the semiconductor device A2 are as follows.
- the semiconductor device A2 similarly to the semiconductor device A1, the distance d1 between the first lead 31 and the second lead 32 in the first direction x is larger than the distance d0. Therefore, like the semiconductor device A1, the semiconductor device A2 can ensure a dielectric breakdown voltage that satisfies the conditions of actual use between the first lead 31 and the second lead 32, so that the occurrence of dielectric breakdown can be suppressed. Moreover, it is possible to design the semiconductor device A2 in which the occurrence of dielectric breakdown is suppressed, and to manufacture the semiconductor device A2.
- the distance d4 between the first wire 41 and the third semiconductor element 13 is larger than the distance d0 determined by the above equation (3).
- the distance d4 is the distance in the thickness direction z between the loop portion 413 of each first wire 41 and the seal ring portion 133 of the third semiconductor element 13 .
- the first wire 41 is a component of the first circuit because it conducts to the first semiconductor element 11 .
- the seal ring portion 133 since the third semiconductor element 13 is bonded to the second island portion 321 (second lead 32 ), the seal ring portion 133 has the same potential as the second island portion 321 .
- the semiconductor device A2 since the distance d4 is larger than the distance d0, it is possible to design a dielectric strength voltage between the first wire 41 and the seal ring portion 133 that satisfies actual use conditions. Therefore, the semiconductor device A2 can ensure a suitable dielectric breakdown voltage between the first wire 41 and the third semiconductor element 13, thereby suppressing the occurrence of dielectric breakdown.
- the distance d4 is designed to be larger than the distance d0 by the fourth design process S104. As a result, the semiconductor device A2 in which the occurrence of dielectric breakdown is suppressed can be designed, and the semiconductor device A2 can be manufactured.
- the distance d4' between the first wire 41 and the second lead 32 is greater than the distance d0 determined by the above formula (3).
- the distance d4' is the distance in the thickness direction z between the loop portion 413 of each first wire 41 and the second mounting surface 321a of the second island portion 321 (second lead 32).
- the first wire 41 is a component of the first circuit because it conducts to the first semiconductor element 11 .
- the second lead 32 is a component of the second circuit. In other words, the voltage of the first wire 41 is relatively low, and the voltage of the second lead 32 is relatively high.
- the semiconductor device A2 since the distance d4' is larger than the distance d0, it is possible to design a dielectric breakdown voltage between the first wire 41 and the second lead 32 that satisfies actual use conditions. Therefore, the semiconductor device A2 can ensure a suitable dielectric breakdown voltage between the first wire 41 and the second lead 32, and can suppress the occurrence of dielectric breakdown.
- the distance d4' is designed to be larger than the distance d0 by the fourth design process S104. As a result, the semiconductor device A2 in which the occurrence of dielectric breakdown is suppressed can be designed, and the semiconductor device A2 can be manufactured.
- the semiconductor device, the method for designing the semiconductor device, and the method for manufacturing the semiconductor device according to the present disclosure are not limited to the above-described embodiments.
- the specific configuration of each part of the semiconductor device of the present disclosure and the specific processing of each step of the method of designing the semiconductor device and the method of manufacturing the semiconductor device of the present disclosure can be modified in various ways.
- the present disclosure includes the embodiments set forth in the Appendix below. Appendix 1.
- a first semiconductor element a second semiconductor element; a conducting support including a first lead and a second lead spaced apart from each other in a first direction perpendicular to the thickness direction of the first semiconductor element; a third semiconductor element supported by the conductive support, electrically connected to the first semiconductor element and the second semiconductor element, and insulating the first semiconductor element and the second semiconductor element from each other;
- the first semiconductor element, the second semiconductor element, the third semiconductor element, and a sealing resin covering a part of the conductive support The first semiconductor element is supported by the first lead, The second semiconductor element is supported by the second lead,
- a semiconductor device wherein a distance d1 between the first lead and the second lead in the first direction is greater than a distance d0 determined by equation (4).
- Y is the insulation lifetime [years] required for the semiconductor device
- a and B are constants determined by the material of the sealing resin
- X is the voltage [kVrms].
- Appendix 2. The semiconductor device according to Appendix 1, wherein the distance d1 is 10 mm or less.
- Appendix 3. a first wire connected to the first semiconductor element and the third semiconductor element; a second wire connected to the second semiconductor element and the third semiconductor element; 3.
- Appendix 4. 3.
- the third semiconductor element is supported by the first lead, 4.
- Appendix 6. The semiconductor device according to appendix 5, wherein the distance d3 is 10 mm or less.
- the third semiconductor element is supported by the second lead, 4.
- Y is the insulation lifetime [years] required for the semiconductor device
- a and B are constants determined by the material of the sealing resin
- X is the voltage [kVrms].
- Appendix 10. 9. The method of designing a semiconductor device according to appendix 9, wherein in the first design process, the distance d1 is designed to be 10 mm or less.
- Appendix 11. The semiconductor device is a first wire connected to the first semiconductor element and the third semiconductor element; a second wire connected to the second semiconductor element and the third semiconductor element; Supplementary note 9 or Supplementary note, wherein the designing step includes a second design process for designing the distance d2 between the first wire and the second wire to be greater than the distance d0 determined by equation (5) 11.
- Appendix 12. The method of designing a semiconductor device according to appendix 11, wherein in the second design process, the distance d2 is designed to be 10 mm or less. Appendix 13. In the semiconductor device, the third semiconductor element is supported by the first lead, Supplementary Note 11, wherein the designing step includes a third designing process for designing such that the distance d3 between the second wire and the third semiconductor element is greater than the distance d0 determined by Equation (5). 12. The method for designing a semiconductor device according to appendix 12. Appendix 14. 14. The method of designing a semiconductor device according to appendix 13, wherein in the third design process, the distance d3 is designed to be 10 mm or less. Appendix 15.
- the third semiconductor element is supported by the second lead, Supplementary note 11, wherein the designing step includes a fourth designing process for designing such that the distance d4 between the first wire and the third semiconductor element is greater than the distance d0 determined by Equation (5).
- Appendix 17. A method for manufacturing a semiconductor device, comprising the method for designing a semiconductor device according to any one of Appendixes 9 to 16.
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Abstract
Description
付記1.
第1半導体素子と、
第2半導体素子と、
前記第1半導体素子の厚さ方向に直交する第1方向に互いに離れて配置された第1リードおよび第2リードを含む導通支持体と、
前記導通支持体に支持され、且つ前記第1半導体素子と前記第2半導体素子とに電気的に接続され、且つ前記第1半導体素子および前記第2半導体素子を互いに絶縁する第3半導体素子と、
前記第1半導体素子、前記第2半導体素子および前記第3半導体素子、並びに、前記導通支持体の一部を覆う封止樹脂と、を備え、
前記第1半導体素子は、前記第1リードに支持され、
前記第2半導体素子は、前記第2リードに支持され、
前記第1リードと前記第2リードとの前記第1方向における距離d1が、式(4)によって決定される距離d0よりも大きい、半導体装置。
付記2.
距離d1は、10mm以下である、付記1に記載の半導体装置。
付記3.
前記第1半導体素子と前記第3半導体素子とに接続された第1ワイヤと、
前記第2半導体素子と前記第3半導体素子とに接続された第2ワイヤと、をさらに備え、
前記第1ワイヤと前記第2ワイヤとの距離d2が、式(4)によって決定される距離d0よりも大きい、付記1または付記2のいずれかに記載の半導体装置。
付記4.
距離d2は、10mm以下である、付記3に記載の半導体装置。
付記5.
前記第3半導体素子は、前記第1リードに支持されており、
前記第2ワイヤと前記第3半導体素子との距離d3が、式(4)によって決定される距離d0よりも大きい、付記3または付記4のいずれかに記載の半導体装置。
付記6.
距離d3は、10mm以下である、付記5に記載の半導体装置。
付記7.
前記第3半導体素子は、前記第2リードに支持されており、
前記第1ワイヤと前記第3半導体素子との距離d4が、式(4)によって決定される距離d0よりも大きい、付記3または付記4のいずれかに記載の半導体装置。
付記8.
距離d4は、10mm以下である、付記7に記載の半導体装置。
付記9.
第1半導体素子と、
第2半導体素子と、
前記第1半導体素子の厚さ方向に直交する第1方向に互いに離れて配置された第1リードおよび第2リードを含む導通支持体と、
前記導通支持体に支持され、且つ前記第1半導体素子と前記第2半導体素子とに電気的に接続され、且つ前記第1半導体素子および前記第2半導体素子を互いに絶縁する第3半導体素子と、
前記第1半導体素子、前記第2半導体素子および前記第3半導体素子、並びに、前記導通支持体の一部を覆う封止樹脂と、を備え、
前記第1半導体素子が前記第1リードに支持され、且つ、前記第2半導体素子が前記第2リードに支持される半導体装置の設計方法であって、
前記第1リードと前記第2リードとの前記第1方向における距離d1が、式(5)によって決定される距離d0よりも大きい値となるように設計する第1設計処理を含む設計工程を有する、半導体装置の設計方法。
付記10.
前記第1設計処理においては、距離d1が10mm以下となるように設計する、付記9に記載の半導体装置の設計方法。
付記11.
前記半導体装置が、
前記第1半導体素子と前記第3半導体素子とに接続された第1ワイヤと、
前記第2半導体素子と前記第3半導体素子とに接続された第2ワイヤと、を備え、
前記設計工程は、前記第1ワイヤと前記第2ワイヤとの距離d2が式(5)によって決定される距離d0よりも大きい値となるように設計する第2設計処理を含む、付記9または付記10に記載の半導体装置の設計方法。
付記12.
前記第2設計処理においては、距離d2が10mm以下となるように設計する、付記11に記載の半導体装置の設計方法。
付記13.
前記半導体装置において、前記第3半導体素子は、前記第1リードに支持されており、
前記設計工程は、前記第2ワイヤと前記第3半導体素子との距離d3が、式(5)によって決定される距離d0よりも大きい値となるように設計する第3設計処理を含む、付記11または付記12に記載の半導体装置の設計方法。
付記14.
前記第3設計処理においては、距離d3が10mm以下となるように設計する、付記13に記載の半導体装置の設計方法。
付記15.
前記半導体装置において、前記第3半導体素子は、前記第2リードに支持されており、
前記設計工程は、前記第1ワイヤと前記第3半導体素子との距離d4が、式(5)によって決定される距離d0よりも大きい値となるように設計する第4設計処理を含む、付記11または付記12に記載の半導体装置の設計方法。
付記16.
前記第4設計処理においては、距離d4が10mm以下となるように設計する、付記15に記載の半導体装置の設計方法。
付記17.
付記9ないし付記16のいずれかに記載の半導体装置の設計方法を有する、半導体装置の製造方法。
11:第1半導体素子 11a:主面
11b:裏面 111:パッド
12:第2半導体素子 12a:主面
12b:裏面 121:パッド
13:第3半導体素子 13a:主面
13b:裏面 131:パッド
132:パッド 133:シールリング部
3 :導通支持体 31:第1リード
311:第1アイランド部 311a:第1搭載面
312:第1端子部 312a:被覆部
312b:露出部 313:貫通孔
32:第2リード 321:第2アイランド部
321a:第2搭載面 322:第2端子部
322a:被覆部 322b:露出部
33:第3リード 33A:中間リード
33B:側リード 331:被覆部
332:露出部 34:第4リード
34A:中間リード 34B:側リード
341:被覆部 342:露出部
4:接続部材 41:第1ワイヤ
411:ネック部 412:接合部
413:ループ部 42:第2ワイヤ
421:ネック部 422:接合部
423:ループ部 43:第3ワイヤ
44:第4ワイヤ 45:第5ワイヤ
46:第6ワイヤ 5:封止樹脂
51:頂面 52:底面
53:第1側面 531:第1上部
532:第1下部 533:第1中間部
54:第2側面 541:第2上部
542:第2下部 543:第2中間部
81:リードフレーム 810:平板部
811:第1リード 811a:第1アイランド
811b:支持リード 811c:貫通孔
812:第2リード 812a:第2アイランド
812b:支持リード 813:リード
813c:貫通孔 814:リード
815:外枠 816:ダムバー 82:レジスト
Claims (17)
- 第1半導体素子と、
第2半導体素子と、
前記第1半導体素子の厚さ方向に直交する第1方向に互いに離れて配置された第1リードおよび第2リードを含む導通支持体と、
前記導通支持体に支持され、且つ前記第1半導体素子と前記第2半導体素子とに電気的に接続され、且つ前記第1半導体素子および前記第2半導体素子を互いに絶縁する第3半導体素子と、
前記第1半導体素子、前記第2半導体素子および前記第3半導体素子、並びに、前記導通支持体の一部を覆う封止樹脂と、を備え、
前記第1半導体素子は、前記第1リードに支持され、
前記第2半導体素子は、前記第2リードに支持され、
前記第1リードと前記第2リードとの前記第1方向における距離d1[mm]が、距離d0=0.0294[mm]よりも大きい、半導体装置。 - 距離d1は、10mm以下である、請求項1に記載の半導体装置。
- 前記第1半導体素子と前記第3半導体素子とに接続された第1ワイヤと、
前記第2半導体素子と前記第3半導体素子とに接続された第2ワイヤと、をさらに備え、
前記第1ワイヤと前記第2ワイヤとの距離d2が、前記距離d0よりも大きい、請求項1または請求項2に記載の半導体装置。 - 距離d2は、10mm以下である、請求項3に記載の半導体装置。
- 前記第3半導体素子は、前記第1リードに支持されており、
前記第2ワイヤと前記第3半導体素子との距離d3が、前記距離d0よりも大きい、請求項3または請求項4に記載の半導体装置。 - 距離d3は、10mm以下である、請求項5に記載の半導体装置。
- 前記第3半導体素子は、前記第2リードに支持されており、
前記第1ワイヤと前記第3半導体素子との距離d4が、前記距離d0よりも大きい、請求項3または請求項4に記載の半導体装置。 - 距離d4は、10mm以下である、請求項7に記載の半導体装置。
- 第1半導体素子と、
第2半導体素子と、
前記第1半導体素子の厚さ方向に直交する第1方向に互いに離れて配置された第1リードおよび第2リードを含む導通支持体と、
前記導通支持体に支持され、且つ前記第1半導体素子と前記第2半導体素子とに電気的に接続され、且つ前記第1半導体素子および前記第2半導体素子を互いに絶縁する第3半導体素子と、
前記第1半導体素子、前記第2半導体素子および前記第3半導体素子、並びに、前記導通支持体の一部を覆う封止樹脂と、を備え、
前記第1半導体素子が前記第1リードに支持され、且つ、前記第2半導体素子が前記第2リードに支持される半導体装置の設計方法であって、
前記第1リードと前記第2リードとの前記第1方向における距離d1[mm]が、距離d0=0.0294[mm]よりも大きい値となるように設計する第1設計処理を含む設計工程を有する、半導体装置の設計方法。 - 前記第1設計処理においては、距離d1が10mm以下となるように設計する、請求項9に記載の半導体装置の設計方法。
- 前記半導体装置が、
前記第1半導体素子と前記第3半導体素子とに接続された第1ワイヤと、
前記第2半導体素子と前記第3半導体素子とに接続された第2ワイヤと、をさらに備え、
前記設計工程は、前記第1ワイヤと前記第2ワイヤとの距離d2が前記距離d0よりも大きい値となるように設計する第2設計処理を含む、請求項9または請求項10に記載の半導体装置の設計方法。 - 前記第2設計処理においては、距離d2が10mm以下となるように設計する、請求項11に記載の半導体装置の設計方法。
- 前記半導体装置において、前記第3半導体素子は、前記第1リードに支持されており、
前記設計工程は、前記第2ワイヤと前記第3半導体素子との距離d3が、前記距離d0よりも大きい値となるように設計する第3設計処理を含む、請求項11または請求項12に記載の半導体装置の設計方法。 - 前記第3設計処理においては、距離d3が10mm以下となるように設計する、請求項13に記載の半導体装置の設計方法。
- 前記半導体装置において、前記第3半導体素子は、前記第2リードに支持されており、
前記設計工程は、前記第1ワイヤと前記第3半導体素子との距離d4が、前記距離d0よりも大きい値となるように設計する第4設計処理を含む、請求項11または請求項12に記載の半導体装置の設計方法。 - 前記第4設計処理においては、距離d4が10mm以下となるように設計する、請求項15に記載の半導体装置の設計方法。
- 請求項9ないし請求項16のいずれか1つに記載の半導体装置の設計方法を有する、半導体装置の製造方法。
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