WO2020070899A1 - 半導体パッケージ - Google Patents
半導体パッケージInfo
- Publication number
- WO2020070899A1 WO2020070899A1 PCT/JP2018/037492 JP2018037492W WO2020070899A1 WO 2020070899 A1 WO2020070899 A1 WO 2020070899A1 JP 2018037492 W JP2018037492 W JP 2018037492W WO 2020070899 A1 WO2020070899 A1 WO 2020070899A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- outer peripheral
- semiconductor package
- peripheral side
- side wall
- upper plate
- Prior art date
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
- H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
- H01L25/10—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices having separate containers
- H01L25/11—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices having separate containers the devices being of a type provided for in group H01L29/00
- H01L25/115—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices having separate containers the devices being of a type provided for in group H01L29/00 the devices being arranged next to each other
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/02—Containers; Seals
- H01L23/04—Containers; Seals characterised by the shape of the container or parts, e.g. caps, walls
- H01L23/043—Containers; Seals characterised by the shape of the container or parts, e.g. caps, walls the container being a hollow construction and having a conductive base as a mounting as well as a lead for the semiconductor body
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/40—Mountings or securing means for detachable cooling or heating arrangements ; fixed by friction, plugs or springs
- H01L23/4006—Mountings or securing means for detachable cooling or heating arrangements ; fixed by friction, plugs or springs with bolts or screws
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/562—Protection against mechanical damage
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/58—Structural electrical arrangements for semiconductor devices not otherwise provided for, e.g. in combination with batteries
- H01L23/62—Protection against overvoltage, e.g. fuses, shunts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
- H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
- H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
- H01L25/07—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L29/00
- H01L25/072—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L29/00 the devices being arranged next to each other
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
- H01L25/18—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof the devices being of types provided for in two or more different subgroups of the same main group of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/02—Containers; Seals
- H01L23/04—Containers; Seals characterised by the shape of the container or parts, e.g. caps, walls
- H01L23/043—Containers; Seals characterised by the shape of the container or parts, e.g. caps, walls the container being a hollow construction and having a conductive base as a mounting as well as a lead for the semiconductor body
- H01L23/051—Containers; Seals characterised by the shape of the container or parts, e.g. caps, walls the container being a hollow construction and having a conductive base as a mounting as well as a lead for the semiconductor body another lead being formed by a cover plate parallel to the base plate, e.g. sandwich type
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/16—Fillings or auxiliary members in containers or encapsulations, e.g. centering rings
- H01L23/18—Fillings characterised by the material, its physical or chemical properties, or its arrangement within the complete device
- H01L23/24—Fillings characterised by the material, its physical or chemical properties, or its arrangement within the complete device solid or gel at the normal operating temperature of the device
Definitions
- Embodiments of the present invention relate to a semiconductor package on which a semiconductor element is mounted.
- the semiconductor chip is sealed with resin. If a short-circuit fault occurs in the semiconductor chip due to some factor, a large current flows into the semiconductor chip, and the semiconductor chip may burst. In this case, melting and vaporization of the components in the sub-module cause a large rupture of the resin sealing the semiconductor chip, and the contents squirt from the rupture portion at a high pressure.
- the space in which the submodules are arranged is a closed space.
- the pressure in the sealed space rapidly increases, and there is a possibility that the exterior of the semiconductor package may burst.
- the semiconductor package of the present embodiment provides a semiconductor package in which the possibility of rupture of the exterior is suppressed even when a part of the internal semiconductor chip is short-circuited.
- a semiconductor package includes a plurality of sub-modules each having a semiconductor chip therein, and in a semiconductor package including the sub-module electrically connected in parallel, the sub-module is paired with the sub-module.
- An electrode post that supports the electrode post, a plate-shaped metal pedestal that fixes the electrode post to one surface, a resin outer peripheral side wall that stands upright from the pedestal, and surrounds the plurality of submodules, A metal upper plate closing an opening formed by the outer peripheral side wall, a first fastening member fixing the pedestal and the outer peripheral side wall by fastening, and a second fastening member fixing the upper plate and the outer peripheral side wall by fastening.
- the pedestal, the outer peripheral side wall, and the upper plate seal a space containing a plurality of sub-modules.
- FIG. 2 is a cross-sectional view illustrating a configuration of the semiconductor package according to the first embodiment.
- FIG. 2 is a perspective view illustrating a configuration of a submodule according to the first embodiment.
- FIG. 2 is a top view of the inside of the semiconductor package according to the first embodiment.
- FIG. 2 is a cross-sectional view illustrating a configuration of the semiconductor package according to the first embodiment. It is sectional drawing of the submodule which shows a mode that the content erupted. It is the figure which showed the relationship between the pressure which the content which ejected from the open surface gives to an outer peripheral side wall, and distance.
- FIG. 1 is a cross-sectional view illustrating a configuration of the semiconductor package according to the first embodiment.
- FIG. 2 is a perspective view illustrating a configuration of a submodule according to the first embodiment.
- FIG. 2 is a top view of the inside of the semiconductor package according to the first embodiment.
- FIG. 2 is a cross-sectional view illustrating
- FIG. 4 is a cross-sectional view of the semiconductor package showing a relationship between an upper plate thickness and a stress when a pressure is applied inside the semiconductor package 100.
- 9 is a graph showing a relationship between a distance between a ruptured submodule and an outer peripheral side wall and a stress applied to the outer peripheral side wall. It is sectional drawing of the semiconductor package in 2nd Embodiment. It is sectional drawing of the semiconductor package in 2nd Embodiment. It is sectional drawing of the semiconductor package in 3rd Embodiment. It is sectional drawing of the semiconductor package in other embodiment.
- FIG. 1 is a sectional view illustrating a configuration of a semiconductor package according to the first embodiment.
- FIG. 2 is a perspective view illustrating a configuration of a submodule according to the first embodiment.
- FIG. 3 is a top view of the inside of the semiconductor package according to the first embodiment.
- the semiconductor package 100 includes a plurality of submodules 1 each having a semiconductor chip therein.
- the submodule 1 forms a single semiconductor package 100 by being electrically connected in parallel.
- the semiconductor package 100 includes an electrode post 2, a cooler 3 serving as a pedestal, an outer peripheral side wall 4, and an upper plate 5.
- the cooler 3, the outer peripheral side wall 4, and the upper plate 5 are fixed by a fastening member 6, thereby sealing a space in which the submodule 1 is arranged.
- the sub-module 1 electrically connects the electrode terminals 11 via the bus bars 7.
- the submodule 1 houses the semiconductor chip 21 inside.
- the semiconductor chip 21 includes, for example, a power semiconductor element used for power conversion.
- a power semiconductor element is, for example, a switching element having a control electrode such as an IGBT (Insulated Gate Bipolar Transistor) or a MOSFET (Metal Oxide Semiconductor Field Effect Transistor), or a diode such as an FRD (Fast Recovery Diode).
- a chip of a switching element and a chip of a diode may be mixed.
- the submodule 1 has an electrode plate 22 bonded to both surfaces of a semiconductor chip 21 housed in a metal reinforcing case 23, and is entirely sealed with a resin 24.
- the sub-module 1 has an electrode terminal 11 for connecting to the bus bar 7 as a current supply path.
- the electrode terminal 11 is connected to one of the two electrode plates 22 (hereinafter, referred to as an electrode plate 22a).
- a gate connector 25 for transmitting a signal to the semiconductor chip 21 protrudes.
- One surface of the submodule 1 is a case opening surface 26 of the reinforcing case 23.
- the electrode terminal 11 and the gate connector 25 extend from the case opening surface 26 and protrude outside the submodule 1.
- FIG. 3 is a schematic diagram of the internal layout of the semiconductor package 100 as viewed from above. As shown in FIG. 3, inside the semiconductor package 100, a number of submodules 1 are electrically connected in parallel via a bus bar and mounted.
- the bus bar 7 electrically connects the electrode terminals 11 of the submodule 1 in the semiconductor package 100.
- the bus bar 7 includes a main shaft disposed between the two sub-modules 1 arranged so that the case opening surfaces 26 face each other, and a connection shaft connecting the main shafts.
- Many sub-modules 1 are collectively arranged in one area (area E in FIG. 3) covered by the outer peripheral side wall 4.
- the sub-module 1 is mounted between the case opening surface 26 and the outer peripheral side wall 4 in a direction in which an intervening object serving as a shield is arranged.
- the inclusion is another submodule 1. Since the case opening surfaces 26 of the submodules 1 are arranged so as to face each other, in all the submodules 1, another submodule 1 is interposed between the case opening surface 26 and the outer peripheral side wall 4.
- the cooler 3 is made of a metal material having high electrical conductivity and thermal conductivity. Further, since it is made of metal, it has higher rigidity and ductility than general resin materials. Cooler 3 contains iron, stainless steel, copper, or aluminum as a main component.
- the cooler 3 is a plate-shaped member, and a plurality of electrode posts 2 are fixed to one surface of the plate.
- the electrode post 2 is a columnar member made of a material having high electrical conductivity and thermal conductivity. One end of the electrode post 2 is fixed to the cooler 3, and the other end is buried in the sub-module 1.
- the electrode post 2 may be integrated with the cooler 3.
- the electrode posts 2 are electrically connected to one surface of the semiconductor chip 21, and come into contact with an electrode plate 22 to which the electrode terminals 11 are not connected (hereinafter referred to as an electrode plate 22b). That is, the cooler 3 is mechanically and electrically connected to the sub-module 1 via the electrode post 2 and functions as a radiator for radiating heat generated in the sub-module 1 and an electrode of the semiconductor chip 21. I do.
- the thickness of the cooler 3 is set to a thickness capable of forming a gap inside.
- the heat may be dissipated from the cooler 3 by circulating a coolant such as pure water in the space inside the cooler 3.
- Cooling fins may be provided on the surface of the cooler 3 opposite to the surface on which the electrode posts 2 are fixed. The cooling fins are provided to increase a heat transfer area, and improve heat dissipation efficiency.
- the surface of the cooler 3 to which the electrode posts 2 are fixed is filled with an insulating resin 8.
- the insulating resin 8 is also filled between the cooler 3 and the bus bar 7, and insulates the cooler 3 from the bus bar 7.
- the outer peripheral side wall 4 is a resin member that stands up from the surface of the cooler 3 to which the electrode posts 2 are fixed.
- the outer peripheral side wall 4 has a shape that covers the periphery of the area E where the plurality of sub-modules 1 are arranged without a gap.
- the outer peripheral side wall 4 is fastened to the cooler 3 by a fastening member 6a such as a bolt.
- the fastening member 6a for fastening the outer peripheral side wall 4 and the cooler 3 is a first fastening member in the claims.
- FIG. 4 is a cross-sectional view illustrating the configuration of the semiconductor package according to the first embodiment.
- a notch is provided in a part of the outer peripheral side wall 4, and a sealing adhesive 9 is circumferentially wrapped around the notch to be bonded.
- the notch may be formed by cutting out a part of the contact surface between the outer peripheral side wall 4 and the cooler 3 to create a step having a height different from the contact surface. Since the outer peripheral side wall 4 covers the periphery of the area E without a gap, the notch also covers the periphery of the area E. Further, after the seal adhesive 9 is cured, an adhesive cured layer formed by curing the seal adhesive 9 is formed.
- the adhesive cured layer also covers the periphery of the area E while being present in the notch.
- a silicon adhesive or an epoxy adhesive can be used in consideration of adhesive strength and durability.
- a silicone adhesive TSE series is desirable.
- the upper plate 5 is a thin plate-shaped member that is thinner than the cooler 3.
- the upper plate 5 is a metal material, like the cooler 3, and has higher rigidity and ductility than general resin materials.
- the upper plate 5 contains iron, stainless steel, or aluminum as a main component.
- the outer peripheral side wall 4 covers the periphery of the area E without a gap
- the outer peripheral side wall 4 includes the area E on the inner side, and can be said as a cylindrical member having both ends opened.
- a pedestal is fixed to one of the openings of the outer peripheral side wall 4, and an upper plate 5 is fixed to the other opening.
- the upper plate 5 is fastened to the outer peripheral side wall 4 by a fastening member 6b such as a bolt.
- the fastening member 6b for fastening the upper plate 5 and the outer peripheral side wall 4 is a second fastening member in the claims.
- a cutout is provided in the contact surface of the outer peripheral side wall 4 with the upper plate 5 similarly to the contact surface of the pedestal.
- a seal adhesive 9 is wound around the notch and adhered.
- the semiconductor device of the present embodiment has a reinforcing case 23.
- the reinforcing case 23 serves as an electrode separation suppressing member for preventing separation between the electrode plate 22a and the electrode plate 22b in the event of a short-circuit failure of the semiconductor chip 21, and the direction of ejection of contents ejected from the submodule 1 in the event of a failure.
- an ejection direction regulating member for regulating the pressure.
- the semiconductor chip 21 causes a short-circuit failure due to some factor and a large current flows into the semiconductor chip 21 and thereby ruptures the semiconductor chip 21
- the rupture force generated by the rupture of the semiconductor chip 21 causes the upper and lower electrode plates 22 to break. Receive a load in the direction in which they separate.
- the metal reinforcing case 23 disposed inside the submodule 1 suppresses the separation of the electrode plates 22 due to its rigidity.
- the reinforcing case 23 is a metal rectangular parallelepiped having the case opening surface 26 on one surface. Of the four surfaces erected from the end of a surface (an ejection direction regulating surface described later) erected from the surface facing the case opening surface 26, two parallel surfaces are electrode separation suppressing members, and The plate 22 is prevented from separating in the vertical direction.
- the distance between the two electrodes does not change even after the semiconductor chip 21 is short-circuited due to the electrode separation suppressing member that sandwiches the two electrodes from above and below and the side surface of the reinforcing case 23 that fixes their relative positions. There is no. As a result, the joining member (solder) and the electrode plate 22 in the vicinity of the failure location are melted and solidified, and the conductive state can be maintained.
- FIG. 5 is a cross-sectional view of the sub-module showing a state in which the contents are ejected.
- the ejection pressure from the submodule 1 reaches a pressure of several tens of MPa, and a pressure that increases the pressure inside the semiconductor package 100 by several hundred kPa is generated. If this pressure is to be suppressed without breaking only by a resin case that is a brittle material having a high insulating property, it is necessary to design the upper plate 5 very thick, and the semiconductor package 100 becomes large and heavy. Inevitable.
- FIG. 6 derives the relationship between the upper plate thickness and the stress when pressure is applied to the inside of the semiconductor package 100 when the upper plate 5 is made of resin under certain conditions. From this result, it can be seen that when the upper plate 5 is made of resin, a plate thickness of at least 30 to 40 mm is required.
- FIG. 7 is a cross-sectional view illustrating a state where a short-circuit fault occurs inside the semiconductor package 100 and the internal pressure increases.
- the entire upper plate 5 can be deformed while being largely curved with the end fixed by the fastening member 6 as a fulcrum.
- the load on the fixed portion is reduced by receiving the load while the upper plate 5 is deformed in this manner, it is not necessary to use a conventional mechanism for pressing with a large load.
- the load applied to the seal adhesive 9 is relatively small. Therefore, by applying the sealing adhesive 9 to the inside of the fastening members 6a and 6b and joining the upper plate 5 and the outer peripheral side wall 4, the contents inside the semiconductor package 100 are prevented from being ejected to the outside. It becomes possible.
- the direction of the ejection of the contents ejected from the submodule 1 is regulated by the reinforcing case 23. That is, the direction of the open surface 26 is the ejection direction. That is, on the mounting plane of the semiconductor chip 21, a surface facing the case opening surface 26 of the reinforcing case 23 (hereinafter, referred to as the ejection direction regulating surface) is located.
- the ejection direction regulating surface serves as an ejection direction regulating member, and regulates the ejection direction of the content ejected from the submodule 1.
- the outer peripheral side wall 4 does not need to have a strength that directly withstands a high pressure load, and a sufficient strength that does not break the internal pressure of the semiconductor package 100 is sufficient. Becomes
- FIG. 8 is a view showing the relationship between the pressure applied to the outer peripheral side wall 4 by the contents ejected from the case opening surface 26 of the submodule 1 and the distance. Under these conditions, the pressure is about several hundred kPa at a distance of about 15 to 25 mm from the ejection part, and is about the same as the internal pressure of the semiconductor package 100 when the semiconductor chip 21 ruptures.
- the influence of the direct action due to the pressure can be reduced.
- the influence of the pressure of the ejected material on the outer peripheral side wall 4 is reduced. Can be suppressed.
- the present embodiment provides excellent operation continuity by preventing separation of the electrode plates 22a and 22b in the event of a short-circuit failure of the semiconductor chip 21, and the sub-module due to contents ejected from the sub-module 1. It has the effect of destruction of the semiconductor package due to a rise in the pressure inside the semiconductor device and the contents ejected.
- Each of these effects alone or in combination, can realize a semiconductor package with excellent safety and continuous operation.
- FIG. 9 is a partial cross-sectional view of the semiconductor package 101 according to the second embodiment.
- an upper plate 31 whose end is bent is disposed in place of the upper plate 5.
- FIG. 11 is a partial cross-sectional view of the semiconductor package 103 according to the third embodiment.
- an upper plate 33 having a protruding portion 33 a is disposed at the end of the adhesive application portion.
- a concave portion 34a is provided in the upper plate joining portion of the outer peripheral side wall 4 so as to fit into the projecting portion 33a, and a labyrinth structure is formed by the projecting portion 33a and the concave portion 34a.
- a seal adhesive 35 is filled so as to fill a gap formed by the upper plate protrusion 33a and the outer peripheral side wall recess 34a.
- the upper plate protruding portion 33a obtains a rib effect against bending deformation, so that bending rigidity is improved, and deformation of the upper plate 33 is suppressed. It is possible to suppress the occurrence of a gap in the space.
- FIG. 12 is a cross-sectional view showing an example of the present embodiment, and is a cross-sectional view taken along line AA in FIG.
- the electrode plate 22b is connected to the emitter of the semiconductor chip 21.
- the upper plate 5 is electrically connected to the bus bar 7 at the potential connection portion B.
- the upper plate 5 has the same potential as the energization path EP1 including the electrode plate 22b and the bus bar 7.
- the upper plate 5 it is possible to prevent the upper plate 5 from being independent from the conduction path EP1 including the electrode plate 22b and the bus bar 7, and the electric path EP2 passing through the electrode plate 22b, the electrode post 212, and the cooler 32.
- the upper plate 5 is not included in another energizing circuit, some potential is generated due to the influence of the surrounding environment. When a large potential is generated, an unexpected discharge may occur, which poses a safety problem.
- the upper plate 5 is connected to one of the ground-side conducting path EP1 and the electric path EP2. Thereby, it is possible to realize the semiconductor package 100 in which the potential of the upper plate 5 is controlled.
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- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Chemical & Material Sciences (AREA)
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- Structures Or Materials For Encapsulating Or Coating Semiconductor Devices Or Solid State Devices (AREA)
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Abstract
Description
[1-1.構成]
図1は、第1実施形態における半導体パッケージの構成を示す断面図であり、図2は、第1実施形態におけるサブモジュールの構成を示す斜視図である。図3は、第1実施形態における半導体パッケージ内部の上面図である。
以上のような本実施形態の半導体装置では、半導体チップ21の短絡故障の際の電極板22a、22bの離間の防止と、サブモジュール1から噴出する内容物によるサブモジュール1内の圧力上昇や噴出物の直接的な影響による半導体パッケージの破壊を防止する。以下、それぞれの観点から作用効果を説明する。
本実施形態の半導体装置は、補強ケース23を有する。補強ケース23は、半導体チップ21の短絡故障の際に電極板22aと電極板22bとの離間を防止する電極離間抑制部材となると共に、故障の際にサブモジュール1から噴出する内容物の噴出方向を規制する噴出方向規制部材となる。例えば、何らかの要因により半導体チップ21が短絡故障を起こし、半導体チップ21に大電流が流れ込み、これにより半導体チップ21が破裂した場合、半導体チップ21が破裂により発生した破裂力によって、上下の電極板22が離間する向きに荷重を受ける。
また、半導体チップ21が破裂した場合、内部部品の溶融・気化によってサブモジュール1の内部で大きな破裂が生じ、内容物が高圧でサブモジュール1から噴出される。
図3に示すようにサブモジュール1のケース開放面26が外周側壁4に直接対向しないように配置することで、サブモジュール1から噴出される高圧力が直接外周側壁4に作用することはなくなる。
[2-1.構成]
半導体チップ24が破裂した際の圧力によって内容物が噴出する際には、外周側壁4と上板31の接合部に隙間が生じることが要因となるため、本実施例のようにこの接合部近傍の曲げ剛性を上げることで、内容物の噴出を抑制しやすくなる。
[3-1.構成]
このような構成とすることにより、上板突出部33aが曲げ変形に対してリブ効果を得るため、曲げ剛性が向上し、上板33の変形が抑制されることで、外周側壁4との間に隙間が生じることを抑制することができる。
以上、本発明のいくつかの実施形態を説明したが、これらの実施形態は、例として提示したものであり、発明の範囲を限定することは意図していない。これら新規な実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。これら実施形態やその変形は、発明の範囲や要旨に含まれるとともに、特許請求の範囲に記載された発明とその均等の範囲に含まれる。
101…半導体パッケージ
102…半導体パッケージ
103…半導体パッケージ
1…サブモジュール
2…電極ポスト
3…冷却器
4…外周側壁
5…上板
6…締結部材
7…バスバー
8…絶縁樹脂
11…電極端子
21…半導体チップ
22…電極板
23…補強ケース
25…ゲートコネクタ
26…ケース開放面
31…上板
31a…折り曲げ部
32…上板
32a…凹凸部
33…上板
33a…突出部
33a…上板突出部
34…上板
34a…凹部
34…外周側壁
34a…外周側壁凹部
35…シール接着剤
Claims (11)
- 内部に半導体チップを有する複数のサブモジュールを有し、
電気的に並列接続された前記サブモジュールを内包する半導体パッケージにおいて、
前記サブモジュールと対になり、前記サブモジュールを支持する電極ポストと、
前記電極ポストを一方の面に固定する平板状の金属製の台座と、
前記台座より立設し、前記複数のサブモジュールの周囲を囲う樹脂製の外周側壁と、
前記外周側壁が形成する開口を塞ぐ金属製の上板と、
前記台座と前記外周側壁を締結により固定する第1締結部材と
前記上板と前記外周側壁を締結により固定する第2締結部材と、
を備え、
前記台座、外周側壁、及び上板は、複数の前記サブモジュールを内包する空間を密閉していること、
を特徴とすることを特徴とする半導体パッケージ。 - 前記台座と前記外周側壁、及び前記上板と前記外周側壁の少なくとも一方は、前記締結部材による締結とともに、接着剤で接着されていること、
を特徴とする請求項1記載の半導体パッケージ。 - 前記外周側壁は、
前記台座または前記上板と接触する前記外周側壁の接触面の一部を削る切欠き部を備え、
前記切欠き部には、前記接着剤が硬化することで形成される接着剤硬化層が形成されることを特徴とする請求項2に記載の半導体パッケージ。 - 前記サブモジュールは、前記半導体チップの実装平面において、
前記半導体チップを中心に放射状に延長した延長面の少なくとも一部には、金属製の噴出方向規制部材が配置されることを特徴とする請求項1乃至3のいずれか1項に記載の半導体パッケージ。 - 前記サブモジュールは、前記半導体チップの実装平面に対して平行、且つ前記半導体チップの上下に配置される2枚の電極と、
前記2枚の電極を挟んで配置される2枚の金属板を有する電極離間抑制部材と、
を備え、
前記噴出方向規制部材は、前記電極離間抑制部材の1つであり、電極離間抑制部材である2枚の金属板の相対位置を固定することを特徴とする請求項4に記載の半導体パッケージ。 - 前記電極離間抑制部材は、1面に開口を設けた開放面を有する金属製の直方体であり、
前記噴出方向規制部材は、開放面と対向する前記直方体の1つの面であり、
前記2枚の金属板は、前記噴出方向規制部材となる前記直方体の1つの面から立設する4つ面のうち、平行となる2つの面を構成する金属板であること、
を特徴とする請求項5に記載の半導体パッケージ。 - 前記半導体チップの実装平面において、
前記半導体チップを中心に放射状に延長した延長面の少なくとも一部には、金属部材が配置されない開放面を有し、
前記開放面と前記外周側壁との間に他のサブモジュールを配置したこと、
を特徴とする請求項1乃至6の何れか1項に記載の半導体パッケージ。 - 前記上板及び前記台座の少なくとも一方は、端部もしくは内部の一部が屈曲する屈曲部を備えること、
を特徴とする請求項1乃至7の何れか1項に記載の半導体パッケージ。 - 前記上板及び前記台座の少なくとも一方は、端部もしくは内部の一部に突出部を備えること、
を特徴とする請求項1乃至8の何れか1項に記載の半導体パッケージ。 - 前記外周側壁において、
前記前記上板及び前記台座との接触面の少なくとも一方には、前記突出部と嵌合する凹部が形成されること、
を特徴とする請求項9に記載の半導体パッケージ。 - 前記凹部の内部には、前記突出部が挿入されると共に接着剤硬化層が形成されること、
を特徴とする請求項10に記載の半導体パッケージ。
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