WO2022080081A1 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
- Publication number
- WO2022080081A1 WO2022080081A1 PCT/JP2021/034087 JP2021034087W WO2022080081A1 WO 2022080081 A1 WO2022080081 A1 WO 2022080081A1 JP 2021034087 W JP2021034087 W JP 2021034087W WO 2022080081 A1 WO2022080081 A1 WO 2022080081A1
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- Prior art keywords
- semiconductor device
- thickness direction
- leads
- opening
- main surface
- Prior art date
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Definitions
- the present disclosure relates to a semiconductor device including a semiconductor element mounted on a flip chip.
- Patent Document 1 discloses an example of such a semiconductor device.
- a plurality of electrodes of a semiconductor element are bonded to a conductive member (lead wiring in Patent Document 1) by a bonding layer (conductor bump in Patent Document 1).
- the plurality of electrodes of the semiconductor element face the conductive member.
- the heat generated from the semiconductor element is released to the outside through a plurality of electrodes and conductive members.
- the semiconductor element is a switching element such as a MOSFET, it is necessary to release the heat generated from the semiconductor element to the outside more quickly. Therefore, it is required to improve the heat dissipation of the semiconductor device.
- one of the problems of this disclosure is to provide a semiconductor device capable of improving heat dissipation.
- the semiconductor device provided by the present disclosure includes a conductive member having a main surface facing in the thickness direction; a semiconductor device including an element body and a plurality of electrodes connected to the element body and bonded to the main surface; A sealing resin that covers the semiconductor element is provided.
- the sealing resin has a top surface facing the same side as the main surface in the thickness direction and an opening penetrating the top surface in the thickness direction. The element body is exposed from the opening.
- the element body has a substrate made of a semiconductor material and a semiconductor layer that is closer to the main surface than the substrate in the thickness direction and conducts to the plurality of electrodes.
- the substrate has a base surface facing the same side as the main surface in the thickness direction, and the base surface is exposed from the opening.
- the base surface is flush with the top surface.
- the base surface is located farther from the main surface than the top surface in the thickness direction.
- the base surface is located closer to the main surface than the top surface in the thickness direction.
- the top surface includes an opening edge defining the opening, and the opening edge is located outwardly away from the base surface when viewed along the thickness direction.
- the sealing resin is connected to the opening edge and has an opening surface that defines the opening, and the opening surface is in contact with the peripheral edge of the base surface.
- the opening surface is a first region located between the top surface and the main surface in the thickness direction and parallel to the top surface, and the first region and the opening edge.
- the first region is in contact with the peripheral edge of the base surface, including a second region connected to.
- the second region is inclined with respect to both the first region and the top surface.
- the area of the opening gradually decreases from the top surface toward the main surface when viewed along the thickness direction.
- the semiconductor device of the present disclosure further comprises a conductive bonding layer for bonding the main surface and the plurality of electrodes.
- Each of the plurality of electrodes has a pad portion in contact with the element main body and a columnar portion protruding from the pad portion in the thickness direction, and the columnar portion is in contact with the bonding layer.
- the columnar portion of each of the plurality of electrodes has a tip surface facing the main surface and a side surface connected to the tip surface and oriented in a direction orthogonal to the thickness direction.
- the bonding layer is in contact with the tip surface and the side surface.
- the semiconductor element has a surface protective film that faces the main surface in the thickness direction and covers the element body.
- the tip surface of each of the plurality of electrodes is located between the main surface and the surface protective film in the thickness direction.
- the pad portion and the columnar portion are in contact with the surface protective film.
- the columnar portion of each of the plurality of electrodes has a recess recessed from the tip surface toward the thickness direction, and the bonding layer is recessed in the recess.
- the conductive member includes a plurality of first leads and a plurality of second leads.
- the plurality of first leads extend along a first direction orthogonal to the thickness direction and are spaced apart from each other in a second direction orthogonal to both the thickness direction and the first direction. ing.
- the plurality of second leads are spaced apart from the plurality of first leads in the second direction.
- the semiconductor layer includes a switching circuit and a control circuit conducting the switching circuit.
- the first electrode of the plurality of electrodes is conductive to the switching circuit and is joined to the main surface of any of the plurality of first leads.
- the second electrode of the plurality of electrodes is conductive to the control circuit and is joined to the main surface of any of the plurality of second leads.
- the sealing resin covers a part of each of the plurality of first leads and a part of each of the plurality of second leads.
- Each of the first lead and each second lead is connected to the back surface opposite to the main surface in the thickness direction, and is connected to the main surface and the back surface, and has a direction orthogonal to the thickness direction. Has an facing end face. The back surface and the end surface of each of the first leads, and the back surface and the end surface of each of the second leads are exposed from the sealing resin.
- FIG. 1 It is a top view of the semiconductor device which concerns on 1st Embodiment of this disclosure. It is a top view of the semiconductor device corresponding to FIG. 1, and is transmitted through a sealing resin. It is a top view of the semiconductor device corresponding to FIG. 1, and is transmitted through a sealing resin and a part of a semiconductor element. It is a bottom view of the semiconductor device shown in FIG. 1. It is a front view of the semiconductor device shown in FIG. 1. It is a rear view of the semiconductor device shown in FIG. 1. It is a right side view of the semiconductor device shown in FIG. 1. It is a left side view of the semiconductor device shown in FIG. 1. It is a partially enlarged view of FIG. It is a partially enlarged view of FIG. FIG.
- FIG. 3 is a cross-sectional view taken along the line XI-XI of FIG. It is sectional drawing which follows the XII-XII line of FIG. It is sectional drawing which follows the XIII-XIII line of FIG. It is sectional drawing which follows the XIV-XIV line of FIG. It is a partially enlarged view of FIG. It is a partially enlarged view of FIG. It is a partially enlarged view of FIG. It is sectional drawing of the semiconductor device which concerns on 2nd Embodiment of this disclosure.
- FIG. 18 is a partially enlarged view. It is a top view of the semiconductor device which concerns on 3rd Embodiment of this disclosure. It is sectional drawing which follows the XXI-XXI line of FIG.
- FIG. 21 is a partially enlarged view. It is a partially enlarged sectional view of the semiconductor device which concerns on 4th Embodiment of this disclosure.
- the semiconductor device A10 includes a conductive member 10, a semiconductor element 20, a bonding layer 30, and a sealing resin 40. As shown in FIG. 1, the package format of the semiconductor device A10 is QFN (Quad Flat Non-Lead Package).
- the semiconductor element 20 is a flip-chip type LSI.
- the semiconductor element 20 includes a switching circuit 212A and a control circuit 212B (details will be described later) therein. In the semiconductor device A10, DC power (voltage) is converted into AC power (voltage) by the switching circuit 212A.
- the semiconductor device A10 is used, for example, as one element constituting the circuit of a DC / DC converter.
- FIG. 2 is transparent to the sealing resin 40 for convenience of understanding.
- the sealing resin 40 and the semiconductor element 20 (excluding the columnar portions 222 of the plurality of electrodes 22 described later) are transmitted.
- each of the transmitted semiconductor element 20 and the sealing resin 40 is shown by an imaginary line (dashed-dotted line).
- the thickness direction z of the conductive member 10 is referred to as "thickness direction z".
- the direction orthogonal to the thickness direction z is called “first direction x”.
- the direction orthogonal to both the thickness direction z and the first direction x is referred to as a "second direction y".
- the semiconductor device A10 has a rectangular shape when viewed along the thickness direction z.
- the side on which the plurality of second leads 12 (details will be described later) are located in the second direction y is referred to as "one side of the second direction y”.
- the side on which the plurality of first leads 11 (details will be described later) are located in the second direction y is referred to as "the other side of the second direction y".
- the conductive member 10 supports the semiconductor element 20 and has a terminal for mounting the semiconductor device A10 on the wiring board.
- the conductive member 10 is partially covered with the sealing resin 40.
- the conductive member 10 has a main surface 101 and a back surface 102 facing opposite to each other in the thickness direction z.
- the main surface 101 faces one side in the thickness direction z and faces the semiconductor element 20.
- the semiconductor element 20 is supported by the main surface 101.
- the main surface 101 is covered with the sealing resin 40.
- the back surface 102 faces the other side in the thickness direction z.
- the conductive member 10 is composed of a single lead frame.
- the lead frame is made of, for example, a material containing copper (Cu) or a copper alloy.
- the conductive member 10 includes a plurality of first leads 11, a plurality of second leads 12, and a pair of third leads 13.
- the plurality of first leads 11 have a band shape extending in the second direction y when viewed along the thickness direction z.
- the plurality of first leads 11 are arranged along the second direction y.
- the plurality of first leads 11 are composed of three terminals, a first input terminal 11A, a second input terminal 11B, and an output terminal 11C.
- the plurality of first leads 11 are arranged in the order of the first input terminal 11A, the output terminal 11C, and the second input terminal 11B from one side to the other side in the second direction y.
- DC power (voltage) to be converted into power in the semiconductor device A10 is input to the first input terminal 11A and the second input terminal 11B.
- the first input terminal 11A is a positive electrode (P terminal).
- the second input terminal 11B is a negative electrode (N terminal).
- From the output terminal 11C AC power (voltage) converted into electric power by the switching circuit 212A configured in the semiconductor element 20 is output.
- the first input terminal 11A is located between the plurality of second leads 12 and the output terminal 11C in the second direction y.
- the output terminal 11C is located between the first input terminal 11A and the second input terminal 11B in the second direction y.
- Each of the first input terminal 11A and the output terminal 11C includes a main portion 111 and a pair of side portions 112.
- the main portion 111 extends in the first direction x.
- the semiconductor element 20 is supported by the main surface 101 of the main portion 111.
- the pair of side portions 112 are connected to both ends of the main portion 111 in the first direction x. As shown in FIGS.
- each of the pair of side portions 112 has a first end face 112A.
- the first end surface 112A is connected to both the main surface 101 and the back surface 102 of the first lead 11, and faces the first direction x.
- the first end surface 112A is exposed from the sealing resin 40.
- a constricted portion 112B is formed on each of the pair of side portions 112 of the first input terminal 11A and the output terminal 11C.
- the constricted portion 112B reaches from the main surface 101 of the first lead 11 to the back surface 102, and is recessed from both sides in the second direction y toward the inside of the side portion 112.
- the constricted portion 112B is in contact with the sealing resin 40. Due to the constricted portion 112B, in the first input terminal 11A and the output terminal 11C, the dimension b in the second direction y of each of the pair of first end faces 112A is larger than the dimension B in the second direction y of the back surface 102 of the main portion 111. It will be small.
- the second input terminal 11B is located on the other side of the second direction y with respect to the output terminal 11C. Therefore, the second input terminal 11B is located on the other side of the second direction y among the plurality of first leads 11.
- the second input terminal 11B includes a main portion 111, a pair of side portions 112, and a plurality of protruding portions 113.
- the plurality of projecting portions 113 project from the other side of the main portion 111 in the second direction y.
- the sealing resin 40 is filled between the two adjacent protrusions 113. As shown in FIG. 11, each of the plurality of protrusions 113 has an auxiliary end surface 113A.
- the sub-end surface 113A is connected to both the main surface 101 and the back surface 102 of the second input terminal 11B, and faces the other side in the second direction y.
- the auxiliary end surface 113A is exposed from the sealing resin 40.
- the plurality of sub-end surfaces 113A are arranged at predetermined intervals along the first direction x.
- a notch 112C is formed in each of the pair of side portions 112 of the second input terminal 11B.
- the cut portion 112C reaches from the main surface 101 of the second input terminal 11B to the back surface 102, and is recessed from the first end surface 112A in the first direction x.
- the first end surface 112A is divided into two regions separated from each other in the second direction y.
- the dimension b in the second direction y of each of the pair of first end faces 112A is smaller than the dimension B in the second direction y of the back surface 102 of the main portion 111.
- the cut portion 112C is filled with the sealing resin 40.
- the area of the main surface 101 is larger than the area of the back surface 102.
- the areas of the back surfaces 102 of the first input terminal 11A and the output terminal 11C are both equal.
- the area of the back surface 102 of the second input terminal 11B is larger than the area of the back surface 102 of each of the first input terminal 11A and the output terminal 11C.
- the main surface 101 of the main portion 111 on which the semiconductor element 20 is supported may be plated with silver (Ag), for example.
- silver Ag
- tin Sn
- tin plating for example, a plurality of metal plating in which nickel (Ni), palladium (Pd), and gold (Au) are laminated in this order may be adopted.
- the plurality of second leads 12 are located on one side of the second direction y with respect to the plurality of first leads 11.
- One of the plurality of second leads 12 is a ground terminal of the control circuit 212B configured in the semiconductor element 20.
- a power (voltage) for driving the control circuit 212B or an electric signal for transmitting to the control circuit 212B is input to each of the other plurality of second leads 12.
- each of the plurality of second leads 12 has a second end face 121.
- the second end surface 121 is connected to both the main surface 101 and the back surface 102 of the second lead 12, and faces one side in the second direction y.
- the second end surface 121 is exposed from the sealing resin 40.
- the plurality of second end faces 121 are arranged at predetermined intervals along the first direction x.
- the area of the main surface 101 is larger than the area of the back surface 102.
- the areas of the back surfaces 102 of the plurality of second leads 12 are all the same.
- the back surface 102 of the plurality of second leads 12 on which the semiconductor element 20 is supported may be plated with silver, for example.
- the back surface 102 and the second end surface 121 of the plurality of second leads 12 exposed from the sealing resin 40 may be tin-plated, for example.
- tin plating for example, a plurality of metal plating in which nickel, palladium, and gold are laminated in this order may be adopted.
- each of the pair of third leads 13 has a third end face 131.
- the third end surface 131 is connected to both the main surface 101 and the back surface 102, and faces the first direction x.
- the third end surface 131 is exposed from the sealing resin 40.
- the third end surface 131 is arranged along the second direction y together with the first end surface 112A of the plurality of first leads 11.
- the area of the main surface 101 is larger than the area of the back surface 102.
- silver plating may be applied to the main surface 101 of the pair of third leads 13 on which the semiconductor element 20 is supported.
- the back surface 102 and the third end surface 131 of the pair of third leads 13 exposed from the sealing resin 40 may be tin-plated, for example.
- tin plating for example, a plurality of metal plating in which nickel, palladium, and gold are laminated in this order may be adopted.
- the semiconductor element 20 is bonded to the conductive member 10 (a plurality of first leads 11, a plurality of second leads 12, and a pair of third leads 13) by flip-chip bonding. It is supported by these.
- the semiconductor element 20 is covered with a sealing resin 40.
- the semiconductor device 20 has an element body 21, a plurality of electrodes 22, and a surface protective film 23.
- the element body 21 forms the main part of the semiconductor element 20. As shown in FIGS. 15 and 16, the element main body 21 has a substrate 211, a semiconductor layer 212, and a passivation film 213.
- the substrate 211 supports the semiconductor layer 212, the passivation film 213, the plurality of electrodes 22, and the surface protective film 23 below the substrate 211.
- the substrate 211 is made of a semiconductor material.
- the semiconductor material contains, for example, silicon (Si) or silicon carbide (SiC) as a main component.
- the thickness of the substrate 211 is, for example, 100 ⁇ m or more and 300 ⁇ m or less.
- the substrate 211 has a base surface 211A.
- the base surface 211A faces the same side as the main surface 101 of the conductive member 10 in the thickness direction z.
- the semiconductor layer 212 is located on the side facing the main surface 101 of the conductive member 10 with respect to the substrate 211 in the thickness direction z.
- the semiconductor layer 212 is laminated on the surface of the substrate 211 facing the side opposite to the base surface 211A in the thickness direction z.
- the semiconductor layer 212 includes a plurality of types of p-type semiconductors and n-type semiconductors based on the difference in the amount of elements to be doped.
- the semiconductor layer 212 includes a switching circuit 212A and a control circuit 212B conducting the switching circuit 212A.
- the switching circuit 212A is a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor), an IGBT (Insulated Gate Bipolar Transistor), or the like. In the example shown by the semiconductor device A10, the switching circuit 212A is divided into two regions, a high voltage region (upper arm circuit) and a low voltage region (lower arm circuit). Each region is composed of one n-channel MOSFET.
- the control circuit 212B includes a gate driver for driving the switching circuit 212A, a bootstrap circuit corresponding to a high voltage region of the switching circuit 212A, and the like, and controls for driving the switching circuit 212A normally. ..
- the semiconductor layer 212 is configured with a wiring layer (not shown). The switching circuit 212A and the control circuit 212B are mutually conductive by the wiring layer.
- the passivation film 213 covers the lower surface of the semiconductor layer 212.
- the passivation film 213 has electrical insulation.
- the passivation film 213 is composed of, for example, a silicon oxide film (SiO 2 ) in contact with the lower surface of the semiconductor layer 212 and a silicon nitride film (Si 3 N 4 ) laminated on the silicon oxide film.
- the passivation film 213 is provided with a plurality of openings 213A penetrating in the thickness direction z.
- the plurality of electrodes 22 are located on the side facing the main surface 101 of the conductive member 10 in the thickness direction z.
- the plurality of electrodes 22 are connected to the element body 21.
- the plurality of electrodes 22 project from the element body 21 in the thickness direction z.
- the plurality of electrodes 22 are joined to the main surface 101 of the conductive member 10.
- the plurality of electrodes 22 include a plurality of first electrodes 22A and a plurality of second electrodes 22B. As shown in FIGS. 2 and 3, each of the plurality of second electrodes 22B is located closer to the peripheral edge of the semiconductor device 20 than any of the plurality of first electrodes 22A when viewed along the thickness direction z. ..
- One of the plurality of electrodes 22 is conductive to the switching circuit 212A of the semiconductor layer 212 and is joined to the main surface 101 of any one of the plurality of first leads 11.
- One of the plurality of electrodes 22 is conductive to the control circuit 212B of the semiconductor layer 212 and is joined to the main surface 101 of any of the plurality of second leads 12.
- the pair of the second electrodes 22B of the plurality of second electrodes 22B are conductive to the control circuit 212B and are individually bonded to the main surface 101 of the pair of third leads 13.
- each of the plurality of electrodes 22 has a pad portion 221 and a columnar portion 222.
- the pad portion 221 is in contact with the semiconductor layer 212 of the element main body 21.
- the pad portion 221 is electrically connected to either the switching circuit 212A of the semiconductor layer 212 or the control circuit 212B of the semiconductor layer 212.
- the pad portion 221 contains aluminum (Al) or copper in its composition.
- Al aluminum
- a plurality of metal layers in which copper, nickel, and palladium are laminated in this order downward from the semiconductor layer 212 may be used.
- the pad portion 221 is in contact with the passivation film 213 of the element main body 21.
- the columnar portion 222 projects from the portion of the pad portion 221 exposed from the opening 213A toward the main surface 101 of the conductive member 10.
- the columnar portion 222 is, for example, a columnar portion.
- the columnar portion 222 contains copper in its composition.
- the columnar portion 222 has a tip surface 222A, a side surface 222B, and a recess 222C.
- the tip surface 222A faces the main surface 101 of the conductive member 10.
- the side surface 222B is connected to the tip surface 222A and faces a direction orthogonal to the thickness direction z.
- the recess 222C is recessed from the tip surface 222A in the thickness direction z.
- the plurality of electrodes 22 are formed by electrolytic plating.
- the surface protective film 23 covers the side of the element main body 21 facing the main surface 101 of the conductive member 10, that is, the passivation film 213 of the element main body 21.
- the tip surface 222A of the columnar portion 222 is located between the main surface 101 of the conductive member 10 and the surface protective film 23 in the thickness direction z.
- the surface protective film 23 is in contact with both the pad portion 221 and the columnar portion 222 of the plurality of electrodes 22.
- the surface protective film 23 has electrical insulation.
- the surface protective film 23 is made of a material containing, for example, polyimide.
- the bonding layer 30 is in contact with both the main surface 101 of the conductive member 10 and the plurality of electrodes 22.
- the bonding layer 30 has conductivity.
- each of the plurality of electrodes 22 is joined to the main surface 101 of the conductive member 10 in a state of being electrically connected to the conductive member 10.
- the bonding layer 30 is, for example, lead-free solder containing tin and silver in its composition.
- the bonding layer 30 is in contact with both the front end surface 222A and the side surface 222B of the columnar portion 222. Further, the joining layer 30 is recessed in the recess 222C of the columnar portion 222.
- the sealing resin 40 has a top surface 41, a bottom surface 42, a pair of first side surfaces 431, and a pair of second side surfaces 432. Further, the sealing resin 40 has an opening 45 as shown in FIGS. 1 and 11 to 14.
- the sealing resin 40 is made of, for example, a material containing a black epoxy resin.
- the top surface 41 faces the same side as the main surface 101 of the conductive member 10 in the thickness direction z.
- the bottom surface 42 faces the side opposite to the top surface 41.
- the back surface 102 of the plurality of first leads 11, the back surface 102 of the plurality of second leads 12, and the back surface 102 of the pair of third leads 13 are exposed from the bottom surface 42.
- the pair of first side surfaces 431 are connected to both the top surface 41 and the bottom surface 42 and face the first direction x.
- the pair of first side surfaces 431 are separated from each other in the second direction y.
- the first end surface 112A of the plurality of first leads 11 and the third end surface 131 of the third lead 13 are the first side surface 431. It is exposed so that it is flush with each other.
- the pair of second side surfaces 432 is connected to any of the top surface 41, the bottom surface 42, and the pair of first side surfaces 431, and faces the second direction y.
- the pair of second side surfaces 432 are separated from each other in the first direction x.
- the second end surface 121 of the plurality of second leads 12 is exposed so as to be flush with the second side surface 432.
- a plurality of sub-end surfaces 113A of the second input terminal 11B (first lead 11) are exposed from the second side surface 432 located on the other side of the second direction y so as to be flush with the second side surface 432. ..
- the opening 45 penetrates the top surface 41 in the thickness direction z.
- the element body 21 of the semiconductor element 20 is exposed from the opening 45.
- the base surface 211A of the substrate 211 of the element main body 21 is exposed from the opening 45.
- the opening 45 has a rectangular shape when viewed along the thickness direction z.
- the top surface 41 includes an opening edge 411 defining the opening 45.
- the base surface 211A is flush with the top surface 41.
- the opening edge 411 is in contact with the peripheral edge of the base surface 211A. This configuration is obtained by grinding the sealing resin 40 in the thickness direction z with a grinding machine or the like to expose the substrate 211 from the sealing resin 40 at the time of manufacturing the semiconductor device A10.
- the semiconductor device A10 has a conductive member 10 having a main surface 101 facing the thickness direction z, an element main body 21, and a plurality of electrodes 22, and a semiconductor element 20 in which a plurality of electrodes 22 are bonded to the main surface 101.
- a sealing resin 40 that covers the semiconductor element 20 is provided.
- the sealing resin 40 has an opening 45 that penetrates the top surface 41 in the thickness direction z.
- the element body 21 is exposed from the opening 45.
- Each of the plurality of electrodes 22 has a pad portion 221 and a columnar portion 222.
- the columnar portion 222 has a smaller length and a larger cross-sectional area than the bonding wire. Therefore, the parasitic resistance between the first lead 11 and the switching circuit 212A can be reduced as compared with the case where the first lead 11 and the pad portion 221 are connected by the bonding wire. When the parasitic resistance is reduced, the effect of reducing the on-resistance and noise in the switching circuit 212A can be obtained.
- Each columnar portion 222 of the plurality of electrodes 22 is formed with a recess 222C that is recessed from the tip surface 222A toward the element main body 21.
- the joining layer 30 is recessed in the recess 222C.
- the anchoring effect (anchor effect) on the columnar portion 222 is generated in the joint layer 30. Therefore, it is possible to improve the bonding strength between the columnar portion 222 and the bonding layer 30.
- a switching circuit 212A is configured in the semiconductor layer 212 of the element main body 21 of the semiconductor element 20. At least one of the plurality of electrodes 22 is conducting to the switching circuit 212A. On the other hand, the back surface 102 of the plurality of first leads 11 included in the conductive member 10 and to which at least one of the plurality of electrodes 22 is bonded is exposed from the bottom surface 42 of the sealing resin 40. As a result, when the semiconductor device A10 is used, the heat generated from the semiconductor element 20 by driving the switching circuit 212A can be efficiently dissipated to the outside.
- Each of the plurality of first leads 11 has a main portion 111 extending in the first direction x and a pair of side portions 112 connected to both ends of the first direction x of the main portion 111.
- Each of the pair of side portions 112 has a first end surface 112A that faces the first direction x and is exposed from the first side surface 431 of the encapsulating resin 40.
- Each of the pair of first end faces 112A is flush with the first side surface 431.
- each dimension b of the pair of first end faces 112A is smaller than the dimension B of the back surface 102 of the main portion 111. Thereby, the area of each of the pair of first end faces 112A can be made smaller than these areas in the conventional QFN semiconductor device.
- the generation of metal burrs on the pair of first end faces 112A is suppressed.
- the mountability of the semiconductor device A10 on the wiring board can be improved.
- a constricted portion 112B is formed in each of the pair of side portions 112 of the plurality of first leads 11 (first input terminal 11A and output terminal 11C).
- each dimension b of the pair of first end faces 112A can be made smaller than the dimension B of the back surface 102 of the main portion 111 of the first lead 11.
- the constricted portion 112B is in contact with the sealing resin 40 in the first direction x. This makes it possible to prevent the plurality of first leads 11 from coming out of the pair of first side surfaces 431 of the sealing resin 40.
- a notch 112C is formed in each of the pair of side portions 112 of the first lead 11 (second input terminal 11B). Also by this, in the second direction y, each dimension b of the pair of first end faces 112A can be made smaller than the dimension B of the back surface 102 of the main portion 111 of the first lead 11.
- the cut portion 112C is filled with the sealing resin 40.
- the first lead 11 is configured to be in contact with the sealing resin 40 in the first direction x. Therefore, it is possible to prevent the first lead 11 from coming out of the pair of first side surfaces 431 of the sealing resin 40.
- the second input terminal 11B includes a plurality of protruding portions 113 protruding from the other side of the second direction y of the main portion 111.
- Each of the plurality of protrusions 113 has an auxiliary end surface 113A facing the second direction y.
- the plurality of sub-end surfaces 113A are exposed from the second side surface 432 of the sealing resin 40 located on the other side of the second direction y.
- the second input terminal 11B is configured to be in contact with the sealing resin 40 on the other side of the second direction y. Therefore, it is possible to prevent the second input terminal 11B from coming out of the second side surface 432 located on the other side of the second direction y.
- each of the plurality of first leads 11 the area of the main surface 101 is larger than the area of the back surface 102.
- the plurality of first leads 11 are configured to be in contact with the sealing resin 40 on the side facing the back surface 102 in the thickness direction z. Therefore, it is possible to prevent the plurality of first leads 11 from coming out of the bottom surface 42 of the sealing resin 40.
- the area of the main surface 101 of each of the plurality of first leads 11 to which at least one of the plurality of electrodes 22 is bonded can be secured wider. Thereby, it is possible to further increase the number of the plurality of electrodes 22 bonded to the plurality of first leads 11.
- the conductive member 10 further includes a plurality of second leads 12 to which at least one of the plurality of electrodes 22 is bonded.
- the area of the main surface 101 is larger than the area of the back surface 102. Therefore, similarly to the relationship between the main surface 101 and the back surface 102 of the first lead 11 described above, it is possible to prevent the plurality of second leads 12 from coming out of the bottom surface 42 of the sealing resin 40. Further, the area of each of the plurality of second leads 12 to which at least one of the plurality of electrodes 22 is bonded can be further secured. Thereby, it is possible to further increase the number of the plurality of electrodes 22 bonded to the plurality of second leads 12.
- FIGS. 18 and 19 The semiconductor device A20 according to the second embodiment of the present disclosure will be described with reference to FIGS. 18 and 19.
- the same or similar elements of the above-mentioned semiconductor device A10 are designated by the same reference numerals, and duplicate description will be omitted.
- the cross-sectional position of FIG. 18 is the same as the cross-sectional position of FIG.
- the configurations of the element main body 21 of the semiconductor element 20 and the sealing resin 40 are different from the configurations of the semiconductor device A10 described above.
- the base surface 211A of the substrate 211 of the element body 21 is conductive with respect to the top surface 41 of the sealing resin 40 in the thickness direction z. It is located on the side away from the main surface 101 of the member 10. As a result, a part of the substrate 211 protrudes from the top surface 41 in the thickness direction z. Further, the opening edge 411 defining the opening 45 of the sealing resin 40 is located away from the base surface 211A in the thickness direction z.
- the substrate 211 is exposed from the sealing resin 40 as in the case of the semiconductor device A10, and then a part of the sealing resin 40 surrounding the periphery of the base surface 211A is subjected to a chemical solution or the like. Obtained by removing with.
- the semiconductor device A20 includes a conductive member 10 having a main surface 101 facing the thickness direction z, an element main body 21, and a plurality of electrodes 22, and a semiconductor element 20 in which a plurality of electrodes 22 are bonded to the main surface 101.
- a sealing resin 40 that covers the semiconductor element 20 is provided.
- the sealing resin 40 has an opening 45 that penetrates the top surface 41 in the thickness direction z.
- the element body 21 is exposed from the opening 45. Therefore, the semiconductor device A20 can also improve the heat dissipation of the device.
- the base surface 211A of the substrate 211 of the element body 21 is on the side away from the main surface 101 of the conductive member 10 with respect to the top surface 41 of the sealing resin 40 in the thickness direction z. To position. As a result, the surface area of the substrate 211 exposed from the sealing resin 40 becomes larger than the surface area of the semiconductor device A10. Thereby, the heat dissipation property of the semiconductor device A20 can be further improved.
- the semiconductor device A30 according to the third embodiment of the present disclosure will be described with reference to FIGS. 20 to 22.
- the same or similar elements of the above-mentioned semiconductor device A10 are designated by the same reference numerals, and duplicate description will be omitted.
- the configurations of the element main body 21 of the semiconductor element 20 and the sealing resin 40 are different from the configurations of the semiconductor device A10 described above.
- the base surface 211A of the substrate 211 of the element body 21 is conductive with respect to the top surface 41 of the sealing resin 40 in the thickness direction z. It is located on the side closer to the main surface 101 of the member 10.
- the opening 45 that defines the sealing resin 40 is recessed from the top surface 41 in the thickness direction z.
- the opening edge 411 defining the opening 45 is located away from the base surface 211A in the thickness direction z. This configuration is obtained by processing the mold used for the molding when the sealing resin 40 is formed by transfer molding in the manufacture of the semiconductor device A30.
- the opening edge 411 is located outwardly away from the base surface 211A of the substrate 211.
- the sealing resin 40 has an opening surface 44 that is connected to the opening edge 411 and defines the opening 45.
- the opening surface 44 is in contact with the peripheral edge of the base surface 211A.
- the opening surface 44 includes a first region 441 and a second region 442.
- the first region 441 is located between the top surface 41 of the sealing resin 40 and the main surface 101 of the conductive member 10 in the thickness direction z, and is parallel to the top surface 41.
- the first region 441 is in contact with the peripheral edge of the base surface 211A of the substrate 211.
- the second region 442 is connected to the first region 441 and the opening edge 411. In the semiconductor device A30, the second region 442 stands upright with respect to the first region 441.
- the semiconductor device A30 includes a conductive member 10 having a main surface 101 facing the thickness direction z, an element main body 21, and a plurality of electrodes 22, and a semiconductor element 20 in which a plurality of electrodes 22 are bonded to the main surface 101.
- a sealing resin 40 that covers the semiconductor element 20 is provided.
- the sealing resin 40 has an opening 45 that penetrates the top surface 41 in the thickness direction z.
- the element body 21 is exposed from the opening 45. Therefore, the semiconductor device A30 can also improve the heat dissipation of the device.
- the base surface 211A of the substrate 211 of the element body 21 is closer to the main surface 101 of the conductive member 10 with respect to the top surface 41 of the sealing resin 40 in the thickness direction z.
- the opening 45 is recessed from the top surface 41 in the thickness direction z.
- a material for example, grease
- the element main body 21 is placed in the external environment while improving the heat dissipation of the semiconductor device A30. Can be protected from.
- FIG. 23 The semiconductor device A40 according to the fourth embodiment of the present disclosure will be described with reference to FIG. 23.
- the same or similar elements of the above-mentioned semiconductor device A10 are designated by the same reference numerals, and duplicate description will be omitted.
- the cross-sectional position of FIG. 23 is the same as the cross-sectional position of FIG. 22.
- the semiconductor device A30 has an opening surface 44 configuration of the sealing resin 40 different from that of the semiconductor device A30 described above.
- the second region 442 of the opening surface 44 is inclined with respect to both the first region 441 of the opening surface 44 and the top surface 41 of the sealing resin 40. ..
- the area of the opening 45 gradually decreases from the top surface 41 toward the main surface 101 of the conductive member 10.
- the semiconductor device A40 includes a conductive member 10 having a main surface 101 facing the thickness direction z, an element main body 21, and a plurality of electrodes 22, and a semiconductor element 20 in which a plurality of electrodes 22 are bonded to the main surface 101.
- a sealing resin 40 that covers the semiconductor element 20 is provided.
- the sealing resin 40 has an opening 45 that penetrates the top surface 41 in the thickness direction z.
- the element body 21 is exposed from the opening 45. Therefore, the semiconductor device A40 can also improve the heat dissipation of the device.
- the second region 442 of the opening surface 44 of the sealing resin 40 is inclined with respect to both the first region 441 of the opening surface 44 and the top surface 41 of the sealing resin 40.
- the area of the opening 45 gradually decreases from the top surface 41 toward the main surface 101 of the conductive member 10.
- the conductive member 10 has a plurality of leads (a plurality of first leads 11, a plurality of second leads 12, and a pair of third leads 13) configured from the same lead frame. It is targeted.
- the other conductive member 10 may include an insulating substrate and a conductive layer arranged on the insulating substrate and having a plurality of regions separated from each other.
- the present disclosure is not limited to the above-described embodiment.
- the specific configuration of each part of the present disclosure can be freely redesigned.
- A10, A20, A30, A40 Semiconductor device 10: Conductive member 101: Main surface 102: Back surface 11: First lead 11A: First input terminal 11B: Second input terminal 11C: Output terminal 111: Main part 112: Side part 112A: 1st end surface 112B: Constriction 112C: Notch 113: Protruding part 113A: Sub-end surface 12: 2nd lead 121: 2nd end surface 13: 3rd lead 131: 3rd end surface 20: Semiconductor element 21: Element main body 211: Substrate 211A: Base surface 212: Semiconductor layer 212A: Switching circuit 212B: Control circuit 213: Passion membrane 213A: Opening 22: Electrode 22A: First electrode 22B: Second electrode 221: Pad part 222: Columnar part 222A: Tip Surface 222B: Side surface 222C: Recessed portion 23: Surface protective film 231: Opening 30: Bonding layer 40: Encapsulating resin 41: Top surface 4
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Abstract
Description
10:導電部材 101:主面
102:裏面 11:第1リード
11A:第1入力端子 11B:第2入力端子
11C:出力端子 111:主部
112:側部 112A:第1端面
112B:くびれ部 112C:切込部
113:突出部 113A:副端面
12:第2リード 121:第2端面
13:第3リード 131:第3端面
20:半導体素子 21:素子本体
211:基板 211A:基面
212:半導体層 212A:スイッチング回路
212B:制御回路 213:パッシベーション膜
213A:開口 22:電極
22A:第1電極 22B:第2電極
221:パッド部 222:柱状部
222A:先端面 222B:側面
222C:凹部 23:表面保護膜
231:開口 30:接合層
40:封止樹脂 41:頂面
411:開口縁 42:底面
431:第1側面 432:第2側面
44:開口面 441:第1領域
442:第2領域 45:開口
B:寸法 b,b1,b2:寸法
h1,h2:高さ z:厚さ方向
x:第1方向 y:第2方向
Claims (17)
- 厚さ方向を向く主面を有する導電部材と、
素子本体と、前記素子本体につながり且つ前記主面に接合された複数の電極と、を含む半導体素子と、
前記半導体素子を覆う封止樹脂と、を備え、
前記封止樹脂は、前記厚さ方向において前記主面と同じ側を向く頂面と、前記頂面を前記厚さ方向に貫通する開口と、を有し、
前記素子本体が前記開口から露出している、半導体装置。 - 前記素子本体は、半導体材料からなる基板と、前記厚さ方向において前記基板よりも前記主面に近くかつ前記複数の電極に導通する半導体層と、を有し、
前記基板は、前記厚さ方向において前記主面と同じ側を向く基面を有し、
前記基面が前記開口から露出している、請求項1に記載の半導体装置。 - 前記基面は、前記頂面と面一である、請求項2に記載の半導体装置。
- 前記基面は、前記厚さ方向において、前記頂面よりも前記主面から遠い位置にある、請求項2に記載の半導体装置。
- 前記基面は、前記厚さ方向において、前記頂面よりも前記主面に近い位置にある、請求項2に記載の半導体装置。
- 前記頂面は、前記開口を規定する開口縁を含み、
前記厚さ方向に沿って視て、前記開口縁は、前記基面から外方に離れて位置する、請求項5に記載の半導体装置。 - 前記封止樹脂は、前記開口縁につながり、かつ前記開口を規定する開口面を有し、
前記開口面が前記基面の周縁に接している、請求項6に記載の半導体装置。 - 前記開口面は、前記厚さ方向において、前記頂面と前記主面との間に位置し、かつ前記頂面に対して平行である第1領域と、前記第1領域および前記開口縁につながる第2領域と、を含み、
前記第1領域が前記基面の前記周縁に接している、請求項7に記載の半導体装置。 - 前記第2領域は、前記第1領域および前記頂面の双方に対して傾斜している、請求項8に記載の半導体装置。
- 前記厚さ方向に沿って視て、前記開口の面積は、前記頂面から前記主面に向かうほど徐々に小である、請求項9に記載の半導体装置。
- 前記主面と前記複数の電極とを接合する、導電性の接合層をさらに備え、
前記複数の電極の各々は、前記素子本体に接するパッド部と、前記パッド部から前記厚さ方向に向けて突出する柱状部と、を有し、当該柱状部が前記接合層に接している、請求項2ないし10のいずれかに記載の半導体装置。 - 前記複数の電極の各々の前記柱状部は、前記主面に対向する先端面と、前記先端面につながり、かつ前記厚さ方向に対して直交する方向を向く側面と、を有し、前記接合層は、前記先端面および前記側面に接している、請求項11に記載の半導体装置。
- 前記半導体素子は、前記厚さ方向において前記主面に対向しかつ前記素子本体を覆う表面保護膜を有し、
前記複数の電極の各々の前記先端面は、前記厚さ方向において前記主面と前記表面保護膜との間に位置する、請求項12に記載の半導体装置。 - 前記複数の電極の各々において、前記パッド部および前記柱状部が前記表面保護膜に接している、請求項13に記載の半導体装置。
- 前記複数の電極の各々の前記柱状部は、前記先端面から前記厚さ方向に凹む凹部を有し、前記接合層が前記凹部に陥入している、請求項13または14に記載の半導体装置。
- 前記導電部材は、複数の第1リード、および複数の第2リード、を含み、
前記複数の第1リードは、前記厚さ方向に対して直交する第1方向に沿って延び、かつ前記厚さ方向および前記第1方向の双方に対して直交する第2方向において互いに離間配置されており、
前記複数の第2リードは、前記複数の第1リードから前記第2方向に離間配置されており、
前記半導体層には、スイッチング回路と、前記スイッチング回路に導通する制御回路とが構成されており、
前記複数の電極のうちの第1の電極は、前記スイッチング回路に導通し、かつ前記複数の第1リードのいずれかの前記主面に接合され、
前記複数の電極のうちの第2の電極は、前記制御回路に導通し、かつ前記複数の第2リードのいずれかの前記主面に接合されている、請求項2ないし15のいずれかに記載の半導体装置。 - 前記封止樹脂は、前記複数の第1リードの各々の一部、および前記複数の第2リードの各々の一部を覆い、
各第1リードおよび各第2リードは、それぞれ、前記厚さ方向において前記主面とは反対側の裏面と、前記主面および前記裏面につながり、かつ前記厚さ方向に対して直交する方向を向く端面とを有し、
前記各第1リードの前記裏面および前記端面、および、前記各第2リードの前記裏面および前記端面は、前記封止樹脂から露出している、請求項16に記載の半導体装置。
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JP2004031607A (ja) * | 2002-06-25 | 2004-01-29 | Matsushita Electric Ind Co Ltd | 半導体装置及びその製造方法 |
JP2004235583A (ja) * | 2003-01-31 | 2004-08-19 | Mitsumi Electric Co Ltd | 樹脂封止型半導体装置及びその製造方法 |
JP2007335742A (ja) * | 2006-06-16 | 2007-12-27 | Sony Computer Entertainment Inc | 半導体装置およびその製造方法 |
JP2008124176A (ja) * | 2006-11-10 | 2008-05-29 | Mitsubishi Electric Corp | 電力用半導体装置 |
US20180342438A1 (en) * | 2017-05-25 | 2018-11-29 | Infineon Technologies Ag | Semiconductor Chip Package Having a Cooling Surface and Method of Manufacturing a Semiconductor Package |
JP2020077723A (ja) * | 2018-11-07 | 2020-05-21 | ローム株式会社 | 半導体装置 |
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JP2004031607A (ja) * | 2002-06-25 | 2004-01-29 | Matsushita Electric Ind Co Ltd | 半導体装置及びその製造方法 |
JP2004235583A (ja) * | 2003-01-31 | 2004-08-19 | Mitsumi Electric Co Ltd | 樹脂封止型半導体装置及びその製造方法 |
JP2007335742A (ja) * | 2006-06-16 | 2007-12-27 | Sony Computer Entertainment Inc | 半導体装置およびその製造方法 |
JP2008124176A (ja) * | 2006-11-10 | 2008-05-29 | Mitsubishi Electric Corp | 電力用半導体装置 |
US20180342438A1 (en) * | 2017-05-25 | 2018-11-29 | Infineon Technologies Ag | Semiconductor Chip Package Having a Cooling Surface and Method of Manufacturing a Semiconductor Package |
JP2020077723A (ja) * | 2018-11-07 | 2020-05-21 | ローム株式会社 | 半導体装置 |
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CN116325129A (zh) | 2023-06-23 |
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