WO2022260141A1 - 受動素子及び電子装置 - Google Patents
受動素子及び電子装置 Download PDFInfo
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- WO2022260141A1 WO2022260141A1 PCT/JP2022/023341 JP2022023341W WO2022260141A1 WO 2022260141 A1 WO2022260141 A1 WO 2022260141A1 JP 2022023341 W JP2022023341 W JP 2022023341W WO 2022260141 A1 WO2022260141 A1 WO 2022260141A1
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- conductive film
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3205—Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/50—Assembly of semiconductor devices using processes or apparatus not provided for in a single one of the subgroups H01L21/06 - H01L21/326, e.g. sealing of a cap to a base of a container
- H01L21/60—Attaching or detaching leads or other conductive members, to be used for carrying current to or from the device in operation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
- H01L21/82—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components
- H01L21/822—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components the substrate being a semiconductor, using silicon technology
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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
- H01L23/12—Mountings, e.g. non-detachable insulating substrates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/52—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames
- H01L23/522—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/04—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/481—Disposition
- H01L2224/4813—Connecting within a semiconductor or solid-state body, i.e. fly wire, bridge wire
Definitions
- the present disclosure relates to passive elements and electronic devices.
- This application claims priority based on Japanese application No. 2021-098158 filed on June 11, 2021, and incorporates all the descriptions described in the Japanese application.
- Patent Document 1 discloses the configuration of a semiconductor device and its package.
- the semiconductor device includes a semiconductor chip and a circuit board.
- a semiconductor chip and a circuit board are housed in a package.
- the circuit board is made of ceramic or the like.
- On the circuit board there are a circuit for distributing and combining power, a circuit for matching input/output impedance of transistors, and a surface wiring interconnecting the circuit for distributing and combining power and the circuit for matching input/output impedance. formed.
- the package has input leads and input wiring pads.
- the circuit board is connected to input wiring pads by bonding wires.
- the circuit board is connected to the semiconductor chip by another bonding wire.
- passive elements such as capacitors are sometimes used in electronic devices such as amplifiers.
- a capacitor is used to match the input impedance and output impedance of semiconductor elements built in the electronic device.
- a member having a ceramic substrate and a metal pad provided on the ceramic substrate is arranged on a conductive base, whereby the metal pad and the Capacitance can be obtained with the base.
- the base is set at a constant potential, for example, a common ground potential with the semiconductor element, and the metal pad is connected to the signal input terminal or signal output terminal of the semiconductor element by a wire or the like.
- a silicon oxide film formed on a silicon substrate and having metal pads thereon is called a MOS capacitor.
- a capacitor having an insulating film on a semiconductor substrate and metal pads thereon is used in a high-frequency electronic device, the following problems arise.
- a signal propagates through the metal pad, a return current flows through the conductive base that mounts this capacitor.
- the signal frequency is relatively low, this return current mainly flows inside the base and hardly flows through the semiconductor substrate.
- the signal frequency is relatively high, for example, 100 MHz or higher, the return current mainly flows near the upper surface of the semiconductor substrate due to the so-called skin effect. In this case, the return current is affected by the electrical resistance of the semiconductor substrate, and the high frequency signal is attenuated.
- An object of the present disclosure is to suppress attenuation of high-frequency signals in a passive element having an insulating film on a semiconductor substrate and a metal pad on the insulating film.
- a first passive device includes a semiconductor substrate, a first insulating film, a first metal pad, a first conductor, and a first conductive film.
- the semiconductor substrate has p-type or n-type conductivity and has a main surface and a back surface.
- the first insulating film is provided on the first region on the main surface of the semiconductor substrate.
- the first metal pad is a metal pad provided on the first insulating film.
- a first conductor extends in a first direction from the first metal pad.
- the first conductive film is provided on a second region adjacent to the first region in the first direction on the main surface of the semiconductor substrate.
- the first conductive film is ohmic-connected to the main surface of the semiconductor substrate and has electrical resistivity lower than that of the semiconductor substrate.
- a second passive device includes a semiconductor substrate, a conductive film, a first insulating film, a first metal pad, and a first conductor.
- the semiconductor substrate has p-type or n-type conductivity and has a main surface and a back surface.
- the conductive film is provided on the main surface of the semiconductor substrate over a region including a first region and a second region adjacent to the first region in the first direction.
- the conductive film is in ohmic contact with the main surface of the semiconductor substrate and has electrical resistivity lower than that of the semiconductor substrate.
- the first insulating film is provided on the first region and on the conductive film.
- the first metal pad is a metal pad provided on the first insulating film.
- a first conductor extends in a first direction from the first metal pad.
- An electronic device includes a housing, a semiconductor element, a passive element, a second conductor, and a third conductor.
- the housing has signal terminals and a conductive base.
- the semiconductor element has a signal electrode and a ground electrode conductively joined to the base, and is mounted on the base.
- the passive element includes a semiconductor substrate, a first insulating film, a first metal pad, a first conductor, a first conductive film, a second insulating film, a second metal pad, have A semiconductor substrate is mounted on the base, has a conductivity type of p-type or n-type, and has a main surface and a back surface.
- the first insulating film is provided on the first region on the main surface of the semiconductor substrate.
- a first metal pad is provided on the first insulating film.
- a first conductor connects to the first metal pad and extends in a first direction from the first metal pad.
- the first conductive film is provided on the second region. The second region is adjacent to the first region in the first direction on the main surface of the semiconductor substrate and located under the first conductor.
- the first conductive film is ohmic-connected to the main surface of the semiconductor substrate and has electrical resistivity lower than that of the semiconductor substrate.
- the second insulating film is provided on a third region adjacent to the second region in the first direction.
- a second metal pad is connected to the first conductor and provided on the second insulating film.
- a second conductor electrically connects the first metal pad of the passive element and the signal terminal.
- the third conductor electrically connects the second metal pad of the passive element and the signal electrode of the semiconductor element.
- Attenuation of high frequency signals can be suppressed in a passive element having an insulating film on a semiconductor substrate and a metal pad on the insulating film.
- FIG. 1 is a cross-sectional view showing the structure of the capacitor according to the first embodiment.
- FIG. 2 is a plan view of the capacitor according to the first embodiment.
- FIG. 3 is a schematic diagram showing a configuration example of a conductive film when the semiconductor substrate is a silicon substrate.
- FIG. 4 is a schematic diagram showing a configuration example of a conductive film when the semiconductor substrate is a silicon substrate.
- FIG. 5 is a cross-sectional view showing steps in a method of manufacturing a capacitor.
- FIG. 6 is a cross-sectional view showing steps in a method of manufacturing a capacitor.
- FIG. 7 is a cross-sectional view showing steps in a method of manufacturing a capacitor.
- FIG. 8 is a cross-sectional view showing steps in a method of manufacturing a capacitor.
- FIG. 1 is a cross-sectional view showing the structure of the capacitor according to the first embodiment.
- FIG. 2 is a plan view of the capacitor according to the first embodiment.
- FIG. 3 is
- FIG. 9 is a cross-sectional view showing steps in a method of manufacturing a capacitor.
- FIG. 10 is a cross-sectional view showing steps in a method of manufacturing a capacitor.
- FIG. 11 is a cross-sectional view showing steps in a method of manufacturing a capacitor.
- FIG. 12 is a cross-sectional view showing steps in a method of manufacturing a capacitor.
- 13A and 13B are cross-sectional views showing steps in a method of manufacturing a capacitor.
- FIG. 14 is a cross-sectional view showing steps in a method of manufacturing a capacitor.
- FIG. 15 is a cross-sectional view showing steps in a method of manufacturing a capacitor.
- FIG. 16 is a cross-sectional view showing steps in a method of manufacturing a capacitor.
- FIG. 17 is a cross-sectional view showing steps in a method of manufacturing a capacitor.
- FIG. 18 is a cross-sectional view showing steps in a method of manufacturing a capacitor.
- FIG. 19 is a cross-sectional view showing steps in a method of manufacturing a capacitor.
- FIG. 20 is a cross-sectional view showing steps in a method of manufacturing a capacitor.
- FIG. 21 is a cross-sectional view showing steps in a method of manufacturing a capacitor.
- FIG. 22 is a cross-sectional view showing steps in a method of manufacturing a capacitor.
- FIG. 23 is a cross-sectional view showing steps in a method of manufacturing a capacitor.
- FIG. 24 is a cross-sectional view showing the structure of a ceramic capacitor.
- FIG. 25 is a cross-sectional view showing a capacitor having an insulating film on a semiconductor substrate.
- FIG. 26 is a diagram showing paths of return currents.
- FIG. 27 is a graph showing the relationship between skin depth and signal frequency when the semiconductor substrate is made of silicon.
- FIG. 28 is a diagram showing an example in which two capacitors having the configuration shown in FIG. 25 are arranged.
- FIG. 29 shows a configuration in which the thickness of the insulating film is reduced and the width of the semiconductor substrate is reduced.
- FIG. 30 shows a configuration in which two capacitors have a common semiconductor substrate.
- FIG. 31 is a diagram showing paths of return currents in the capacitor of the first embodiment.
- FIG. 32 is a graph showing S21 transmission characteristics of an RF amplifier.
- FIG. 33 is a cross-sectional view showing the structure of a capacitor according to the first modified example.
- FIG. 34 is a plan view of a capacitor according to the first modified example.
- FIG. 35 is a plan view showing a capacitor according to the second modification.
- FIG. 36 is a plan view showing a state in which wires are connected to the metal pads of the capacitor according to the second modification.
- FIG. 37 is a plan view showing a mode in which wires are connected to the metal pads of the capacitor according to the second modification.
- FIG. 38 is a cross-sectional view showing the structure of a capacitor according to a third modified example.
- FIG. 39 is a plan view of a capacitor according to a third modification.
- FIG. 40 is a plan view showing the configuration of the electronic device according to the second embodiment. 41 is a view showing a cross section along line XXXI-XXXI in FIG. 40.
- FIG. FIG. 42 is a plan view showing the configuration of the electronic device according to the third
- a first passive device comprises a semiconductor substrate, a first insulating film, a first metal pad, a first conductor, and a first conductive film.
- the semiconductor substrate has p-type or n-type conductivity and has a main surface and a back surface.
- the first insulating film is provided on the first region on the main surface of the semiconductor substrate.
- the first metal pad is a metal pad provided on the first insulating film.
- a first conductor extends in a first direction from the first metal pad.
- the first conductive film is provided on a second region adjacent to the first region in the first direction on the main surface of the semiconductor substrate.
- the first conductive film is ohmic-connected to the main surface of the semiconductor substrate and has electrical resistivity lower than that of the semiconductor substrate.
- this first passive element When this first passive element is mounted on a conductive base, the semiconductor substrate is electrically connected to the base and is at the same potential as the base, thereby creating a capacitance between the semiconductor substrate and the first metal pad. is obtained.
- This capacitance depends on the area of the first metal pad and the distance from the first metal pad to the semiconductor substrate, typically the thickness of the first insulating film. Therefore, when the first metal pad is connected to the signal terminal of the semiconductor element by the bonding wire, by appropriately determining the area of the first metal pad and the distance from the first metal pad to the semiconductor substrate, The input impedance or output impedance at the signal terminals can be matched.
- the so-called skin effect causes the return current to flow mainly near the upper surface, ie, the main surface of the semiconductor substrate.
- the return current is affected by the electrical resistance of the semiconductor substrate, and the high-frequency signal is attenuated.
- it is effective to minimize the width of the semiconductor substrate in the traveling direction of the return current, in other words, to shorten the path of the return current in the semiconductor substrate as much as possible.
- the width of the semiconductor substrate is reduced, cracks are more likely to occur in the semiconductor substrate, and rotational misalignment is more likely to occur during assembly of the electronic device, making it difficult to handle the passive elements.
- a first conductive film is provided on the main surface of the semiconductor substrate in addition to the first insulating film and the first metal pad for obtaining capacitance.
- the first conductive film is provided in parallel with the first insulating film and the first metal pad, and is ohmic-connected to the main surface of the semiconductor substrate.
- a high-frequency return current mainly flows in the vicinity of the main surface of the semiconductor substrate in the first region, but in the second region mainly flows in the first conductive film that is ohmic-connected to the main surface of the semiconductor substrate.
- the return current path in the semiconductor substrate can be shortened while ensuring a sufficient width of the semiconductor substrate. Therefore, according to the first passive element, attenuation of high frequency signals can be suppressed.
- the first passive element includes a second insulating film provided on a third region aligned with the second region on the main surface of the semiconductor substrate, and a second metal pad provided on the second insulating film. and may further comprise: The second region may be located between the first region and the third region. In this case, by connecting the first metal pad and the second metal pad with a wire, a matching circuit having two stages of capacitor portions and inductance therebetween can be realized by a single capacitor element.
- the first metal pad may have a first projection projecting toward the second metal pad.
- the first conductive film may have a first concave portion surrounding the first convex portion from three sides. In this case, it becomes possible to bond one end of the wire connecting the first metal pad and the second metal pad to the first protrusion, thereby expanding the adjustable range of the length of the wire.
- the width of the first region in the traveling direction of the current can be kept narrow in the other portions of the first region excluding the portion immediately below the first projection. Thereby, the width of the second region, that is, the width of the first conductive film can be kept wide. Therefore, it is possible to effectively reduce the attenuation of high-frequency signals while increasing the degree of freedom for the length of the wire, that is, the size of the inductance.
- the second metal pad may have a second protrusion that protrudes toward the first protrusion.
- the first conductive film may further have a second recess surrounding the second protrusion from three sides.
- the other end of the wire connecting the first metal pad and the second metal pad can be bonded to the second projection, further expanding the adjustable range of wire length.
- the width of the third region in the traveling direction of the current can be kept narrow in the other portions of the third region excluding the part immediately below the second protrusion.
- the width of the second region that is, the width of the first conductive film can be kept wide. Therefore, it is possible to effectively reduce the attenuation of high-frequency signals while increasing the degree of freedom in determining the length of the wire, that is, the magnitude of the inductance.
- the first passive element may further comprise a second conductive film, a third insulating film and a third metal pad.
- the second conductive film is provided on the fourth region on the main surface of the semiconductor substrate.
- the second conductive film is ohmic-connected to the main surface of the semiconductor substrate and has electrical resistivity lower than that of the semiconductor substrate.
- the third insulating film is provided on the fifth region on the main surface of the semiconductor substrate.
- a third metal pad is a metal pad provided on the third insulating film.
- the first area, the second area, the third area, the fourth area, and the fifth area may be arranged in this order along the first direction. In this case, by connecting the first metal pad and the second metal pad with a wire, and connecting the second metal pad and the third metal pad with another wire, the three stages of capacitor portions and their A matching circuit with an inductance between can be realized with a single capacitor element.
- the width of the first conductive film in the first direction may be greater than the width of the first metal pad in the same direction. In this manner, by reducing the width of the first metal pad and increasing the width of the first conductive film, the portion of the return current path within the semiconductor substrate is shortened, and the portion within the first conductive film is shortened. parts can be lengthened. Therefore, attenuation of high-frequency signals can be effectively reduced while ensuring a sufficient width of the semiconductor substrate.
- the first conductive film may be made of metal. In this case, it is possible to easily form the first conductive film having an electrical resistivity lower than that of the semiconductor substrate.
- the semiconductor substrate may be a silicon substrate, and the first conductive film may include a Ti film in contact with the silicon substrate and an Au film provided on the Ti film.
- the semiconductor substrate and the first conductive film can be firmly bonded, and the reliability of the passive element can be improved.
- the semiconductor substrate may be a gallium arsenide (GaAs) substrate.
- a second passive element includes a semiconductor substrate, a conductive film, a first insulating film, a first metal pad, and a first conductor.
- the semiconductor substrate has p-type or n-type conductivity and has a main surface and a back surface.
- the conductive film is provided on the main surface of the semiconductor substrate over a region including a first region and a second region adjacent to the first region in the first direction.
- the conductive film is in ohmic contact with the main surface of the semiconductor substrate and has electrical resistivity lower than that of the semiconductor substrate.
- the first insulating film is provided on the first region and on the conductive film.
- the first metal pad is a metal pad provided on the first insulating film.
- a first conductor extends in a first direction from the first metal pad.
- the conductive film is electrically connected to the base through the semiconductor substrate and becomes the same potential as the base, so that the conductive film and the first metal pad A capacitance is obtained between This capacitance depends on the area of the first metal pad and the distance from the first metal pad to the conductive film, typically the thickness of the first insulating film. Therefore, when the first metal pad is connected to the signal terminal of the semiconductor element by the bonding wire, by appropriately determining the area of the first metal pad and the distance from the first metal pad to the conductive film, The input impedance or output impedance at the signal terminals can be matched.
- the conductive film in contact with the main surface of the semiconductor substrate extends from the first region provided with the first insulating film for obtaining capacitance and the first metal pad to the second region. is provided. Therefore, the high-frequency return current mainly flows through the conductive film in both the first region and the second region. Thereby, the return current path in the semiconductor substrate can be shortened while ensuring a sufficient width of the semiconductor substrate. Therefore, according to the second passive element, attenuation of high frequency signals can be suppressed.
- the second passive element includes: a second insulating film provided on a conductive film and on a third region adjacent to the second region in the first direction on the main surface of the semiconductor substrate; and a second metal pad provided on the membrane.
- the second region may be located between the first region and the third region.
- the first passive element and the second passive element may further include a backside metal film provided on the backside of the semiconductor substrate and in contact with the semiconductor substrate.
- the back metal film and the base can be easily and firmly bonded using a conductive paste or the like.
- the electrical resistivity of the semiconductor substrate may be 1.0 ⁇ 10 ⁇ 4 ⁇ cm or more and 1 ⁇ cm or less.
- the above first passive element and second passive element are particularly effective when using a semiconductor substrate having such electrical resistivity.
- the first metal pad extends along a second direction that intersects the first direction, and the length of the first metal pad in the second direction is greater than the width of the first metal pad in the first direction. It can be big.
- the first metal pad has a planar shape elongated in the first direction, that is, in the second direction intersecting with the traveling direction of the current. It can be used in power electronic devices.
- the length of the first metal pad in the second direction may be ten times or more the width of the first metal pad in the first direction.
- a first electronic device includes a housing, a semiconductor element, and any one of the passive elements described above.
- the housing has signal terminals and a conductive base.
- the semiconductor element has a signal electrode and a ground electrode conductively joined to the base, and is mounted on the base.
- a passive component is mounted on the base.
- a first metal pad of the passive element is electrically connected to the signal terminal by the first wire and electrically connected to the signal electrode of the semiconductor element by the second wire.
- a semiconductor substrate of the passive device is conductively bonded to the base. According to this electronic device, attenuation of a high-frequency signal can be suppressed by including any of the passive elements described above.
- a second electronic device includes a housing, a semiconductor element, a passive element, a second conductor, and a third conductor.
- the housing has signal terminals and a conductive base.
- the semiconductor element has a signal electrode and a ground electrode conductively joined to the base, and is mounted on the base.
- the passive element includes a semiconductor substrate, a first insulating film, a first metal pad, a first conductor, a first conductive film, a second insulating film, a second metal pad, have A semiconductor substrate is mounted on the base, has a conductivity type of p-type or n-type, and has a main surface and a back surface.
- the first insulating film is provided on the first region on the main surface of the semiconductor substrate.
- a first metal pad is provided on the first insulating film.
- a first conductor connects to the first metal pad and extends in a first direction from the first metal pad.
- the first conductive film is provided on the second region. The second region is adjacent to the first region in the first direction on the main surface of the semiconductor substrate and located under the first conductor.
- the first conductive film is ohmic-connected to the main surface of the semiconductor substrate and has electrical resistivity lower than that of the semiconductor substrate.
- the second insulating film is provided on a third region adjacent to the second region in the first direction.
- a second metal pad is connected to the first conductor and provided on the second insulating film.
- a second conductor electrically connects the first metal pad of the passive element and the signal terminal.
- the third conductor electrically connects the second metal pad of the passive element and the signal electrode of the semiconductor element.
- FIG. 1 is a cross-sectional view showing the structure of a capacitor 1 as a passive element according to the first embodiment.
- FIG. 2 is a plan view of the capacitor 1.
- FIG. Capacitor 1 is used to match one or both of the input impedance and output impedance of a semiconductor device in an electronic device such as an amplifier device.
- the capacitor 1 is mounted on a conductive base 60 provided by the electronic device.
- the capacitor 1 includes a semiconductor substrate 10, a conductive film 21 (first conductive film), an insulating film 31 (first insulating film), an insulating film 32 (second insulating film), a metal pad 41 (first metal pad ), a metal pad 42 (second metal pad), and a back metal film 51 .
- the base 60 is made of metal, for example, and mainly contains copper (Cu) in one example.
- Base 60 has a flat mounting surface 61 .
- the base 60 is larger than the capacitor 1 in plan view (in other words, viewed from the normal direction of the mounting surface 61).
- the semiconductor substrate 10 is a substantially rectangular parallelepiped member.
- the semiconductor substrate 10 has p-type or n-type conductivity.
- semiconductor substrate 10 is a p-type or n-type silicon (Si) substrate.
- semiconductor substrate 10 may be a p-type or n-type GaAs substrate.
- the electrical resistivity of the semiconductor substrate 10 is, for example, 1.0 ⁇ 10 ⁇ 4 ⁇ cm or more and 1 ⁇ cm or less.
- the semiconductor substrate 10 is a silicon substrate, such electrical resistivity can be achieved by setting the n-type or p-type impurity concentration to, for example, 10 15 cm ⁇ 3 or more and 10 21 cm ⁇ 3 or less.
- the semiconductor substrate 10 has a main surface 11, a back surface 12 facing away from the main surface 11, and a pair of side surfaces 13 and 14.
- the normal direction of the main surface 11 coincides with the normal direction of the mounting surface 61 and the thickness direction of the semiconductor substrate 10 .
- Back surface 12 is parallel to main surface 11 .
- the pair of side surfaces 13 and 14 face each other in a direction D ⁇ b>1 (first direction) along the mounting surface 61 .
- a pair of side surfaces 13 and 14 are parallel to each other and perpendicular to the main surface 11 and the back surface 12 .
- the thickness Ta of the semiconductor substrate 10 is, for example, 50 ⁇ m or more and 500 ⁇ m or less, and is 200 ⁇ m in one embodiment.
- the width Wa of the semiconductor substrate 10 in the direction D1 is, for example, 400 ⁇ m or more and 2500 ⁇ m or less, and is 1500 ⁇ m in one embodiment.
- the height-to-width ratio (Ta/Wa) of the semiconductor substrate 10 is, for example, 0.02 or more and 1.25 or less, and is 0.13 in one embodiment.
- a length La of the semiconductor substrate 10 in a direction D2 (second direction) orthogonal to the direction D1 along the mounting surface 61 is, for example, 1000 ⁇ m or more and 8000 ⁇ m or less, and is 6200 ⁇ m in one embodiment.
- the width-to-length ratio (Wa/La) of the semiconductor substrate 10 is, for example, 0.05 or more and 2.5 or less, and is 0.24 in one embodiment.
- the length La of the semiconductor substrate 10 is greater than the width Wa of the semiconductor substrate
- the main surface 11 includes a first region 111, a second region 112 and a third region 113.
- the first region 111, the second region 112, and the third region 113 are spaced apart from each other and arranged side by side in this order in the direction D1. That is, the second region 112 is positioned between the first region 111 and the third region 113 in the direction D1.
- the second region 112 is adjacent to the first region 111 in the direction D1.
- the third region 113 is adjacent to the second region 112 in the direction D1.
- the first region 111 is provided along the side surface 13 of the semiconductor substrate 10 .
- a third region 113 is provided along the side surface 14 of the semiconductor substrate 10 .
- Insulating film 31 is provided on first region 111 of main surface 11 .
- Insulating film 32 is provided on third region 113 of main surface 11 .
- the insulating films 31 and 32 are, for example, inorganic insulating films, and one example is a silicon oxide film (SiO 2 film).
- the silicon oxide film may be a film formed by oxidizing the surface of the silicon substrate.
- the thickness Tb of the insulating films 31 and 32 is, for example, 0.1 ⁇ m or more and 5 ⁇ m or less, and is 1 ⁇ m in one embodiment.
- the insulating film 31 is provided along the side surface 13 of the semiconductor substrate 10 .
- the insulating film 32 is provided along the side surface 14 of the semiconductor substrate 10 .
- the metal pads 41 and 42 are metal pads for wire bonding.
- the metal pad 41 is provided on the insulating film 31 and provided along the side surface 13 of the semiconductor substrate 10 . That is, the insulating film 31 is interposed between the metal pad 41 and the semiconductor substrate 10 .
- the metal pad 42 is provided on the insulating film 32 and provided along the side surface 14 of the semiconductor substrate 10 . That is, the insulating film 32 is interposed between the metal pad 42 and the semiconductor substrate 10 .
- the metal pads 41 and 42 are made of metal materials such as Au, Pt and Ti.
- a conductive wire 71 (first conductor) is bonded to the top surface of the metal pad 41 and the other end of the wire 71 is bonded to the top surface of the metal pad 42 .
- Wire 71 extends from metal pad 41 along direction D1. Thereby, the metal pads 41 and 42 are electrically connected to each other by the wires 71 .
- the length of the wire 71 is, for example, 200 ⁇ m or more and 2000 ⁇ m or less, and in one embodiment is 1600 ⁇ m.
- One end of another conductive wire 72 (third conductor) is bonded to the metal pad 41 .
- the other end of the wire 72 is bonded to, for example, a signal electrode of a semiconductor element (not shown), that is, a signal input terminal or a signal output terminal.
- the metal pad 41 is electrically connected to the signal input terminal or signal output terminal of the semiconductor element by the wire 72 .
- One end of another conductive wire 73 (second conductor) is bonded to the metal pad 42 .
- the other end of the wire 73 is bonded to, for example, a signal input terminal or a signal output terminal of a housing (not shown).
- the metal pad 42 is electrically connected to the signal input terminal or signal output terminal of the housing by the wire 73 .
- the metal pads 41, 42 extend along the direction D2. Length Lc of metal pads 41 and 42 in direction D2 is greater than width Wc of metal pads 41 and 42 in direction D1.
- the length Lc of the metal pads 41 and 42 may be ten times or more the width Wc of the metal pads 41 and 42, or may be thirty times or more the width Wc.
- the length Lc of the metal pads 41 and 42 may be the same as the length La of the semiconductor substrate 10, or may be shorter than the length La.
- the thickness Tc of the metal pads 41 and 42 is, for example, 0.5 ⁇ m or more and 10 ⁇ m or less, and is 5 ⁇ m in one embodiment.
- a width Wc of the metal pads 41 and 42 in the direction D1 is, for example, 100 ⁇ m or more and 1000 ⁇ m or less, and is 200 ⁇ m in one embodiment.
- a ratio (Wc/Wa) of the width Wc of each of the metal pads 41 and 42 to the width Wa of the semiconductor substrate 10 is, for example, 0.05 or more and 0.66 or less, and is 0.13 in one embodiment.
- the length Lc of the metal pads 41 and 42 is, for example, 1000 ⁇ m or more and 8000 ⁇ m or less, and in one embodiment is 6000 ⁇ m.
- the width-to-length ratio (Wc/Lc) of the metal pads 41 and 42 is, for example, 0.01 or more and 0.5 or less, and is 0.033 in one embodiment.
- the conductive film 21 is provided on the second region 112 of the main surface 11 and has ohmic contact with the main surface 11 .
- the conductive film 21 has electrical resistivity lower than that of the semiconductor substrate 10 .
- the conductive film 21 is made of metal, for example.
- the conductive film 21 is arranged between the metal pads 41 and 42 in the direction D1. A gap is provided between the conductive film 21 and the metal pad 41, and the conductive film 21 and the metal pad 41 are insulated from each other. A gap is provided between the conductive film 21 and the metal pad 42, and the conductive film 21 and the metal pad 42 are insulated from each other.
- Conductive film 21A shown in FIG. 3 includes Ti film 211 in contact with the silicon substrate, and Au film 212 provided on Ti film 211 .
- the conductive film 21B shown in FIG. 4 further includes a Pt film 213 provided between the Ti film 211 and the Au film 212 in addition to the Ti film 211 and the Au film 212 .
- the thickness Td of the conductive film 21 is, for example, 0.5 ⁇ m or more and 10 ⁇ m or less, and is 5 ⁇ m in one embodiment.
- a width Wd of the conductive film 21 in the direction D1 is, for example, 200 ⁇ m or more and 2000 ⁇ m or less, and is 1000 ⁇ m in one embodiment.
- the length Ld of the conductive film 21 in the direction D2 is, for example, 200 ⁇ m or more and 2000 ⁇ m or less, and is 6000 ⁇ m in one embodiment.
- the length Ld of the conductive film 21 is equal to the length Lc of the metal pads 41 and 42 in the illustrated example, the length Ld of the conductive film 21 may be longer than the length Lc of the metal pads 41 and 42 . In other words, one end of the conductive film 21 may protrude from the imaginary line connecting one end of the metal pad 41 and one end of the metal pad 42 .
- the width-to-length ratio (Wd/Ld) of the conductive film 21 is, for example, 0.025 or more and 2.3 or less, and is 0.17 in one embodiment.
- the length Ld of the conductive film 21 is greater than the width Wd of the conductive film 21 .
- Width Wd of conductive film 21 is greater than width Wc of metal pads 41 and 42 .
- a ratio (Wc/Wd) between the width Wc of the metal pads 41 and 42 and the width Wd of the conductive film 21 is, for example, 0.01 or more and 1.0 or less, and is 0.20 in one embodiment.
- a gap Ga between the conductive film 21 and the metal pads 41 and 42 is, for example, 5 ⁇ m or more and 200 ⁇ m or less, and is 50 ⁇ m in one embodiment.
- a gap is also provided between the conductive film 21 and the insulating films 31 and 32, and the main surface 11 of the semiconductor substrate 10 is exposed from these gaps.
- Conductive film 21 may be in contact with insulating films 31 and 32, in which case main surface 11 of semiconductor substrate 10 is not exposed.
- the back surface metal film 51 is a metal film provided on the entire surface of the back surface 12 of the semiconductor substrate 10 .
- the back metal film 51 is in contact with the semiconductor substrate 10 .
- the back metal film 51 is made of a metal material such as Au, Pt, or Ti.
- the thickness Te of the back metal film 51 is, for example, 0.1 ⁇ m or more and 10 ⁇ m or less, and is 3 ⁇ m in one embodiment.
- the back metal film 51 is conductively joined to the mounting surface 61 of the base 60 with a conductive paste 74 .
- the conductive paste 74 is, for example, AuSn paste or Ag paste.
- the semiconductor substrate 10 When the capacitor 1 is mounted on the conductive base 60, the semiconductor substrate 10 is electrically connected to the base 60 and has the same potential as the base 60. Capacitance is obtained. This capacitance depends on the area of the metal pads 41 and 42 and the distance from the metal pads 41 and 42 to the semiconductor substrate 10, typically the thickness of the insulating films 31 and 32. FIG. Therefore, when the metal pads 41 and 42 are connected to the signal terminals of the semiconductor element by the wires 71 and 72, the input impedance or output impedance at the signal terminals can be matched.
- 5 to 23 are cross-sectional views showing each step in the method of manufacturing capacitor 1.
- a silicon substrate is used as the semiconductor substrate 10 .
- a mask made of an inorganic material is formed on the main surface 11 of the semiconductor substrate 10. As shown in FIG. Although the case where the mask is made of SiN is exemplified below, the mask material is not limited to this.
- a SiN film 81 is formed all over the main surface 11 of the semiconductor substrate 10 .
- Chemical vapor deposition (CVD) for example, is used to form the SiN film 81 .
- a resist 82 is applied all over the SiN film 81 .
- the resist 82 is of a negative type is exemplified, but the resist 82 may be of a positive type.
- FIG. 7 a portion of the resist 82 above the second region 112 is exposed to form a photosensitive portion 821 .
- FIG. 7 a portion of the resist 82 above the second region 112 is exposed to form a photosensitive portion 821 .
- the portions of the resist 82 other than the exposed portions 821, that is, the portions on the first region 111 and the portions on the third region 113 are removed by development. Then, as shown in FIG. 9, the portion of the SiN film 81 exposed from the resist 82, that is, the portion on the first region 111 and the portion on the third region 113 are removed by etching. After that, as shown in FIG. 10, all resists 82 are stripped and removed. Through the above steps, the SiN mask 83 having openings 831 and 832 on the first region 111 and the third region 113, respectively, is formed. The first region 111 and the third region 113 of the semiconductor substrate 10 are exposed through the openings 831,832.
- the insulating film 31 is formed on the first region 111 of the semiconductor substrate 10 exposed in the opening 831 of the SiN mask 83.
- the insulating film 32 is formed on the third region 113 of the semiconductor substrate 10 exposed in the opening 832 of the SiN mask 83 .
- the insulating films 31 and 32 can be formed using CVD, for example.
- silicon oxide films as the insulating films 31 and 32 may be formed by thermally oxidizing the exposed surface of the semiconductor substrate 10 which is a silicon substrate.
- the SiN mask 83 is removed using a remover.
- the remover is, for example, a liquid mainly containing phosphoric acid.
- the insulating film 31 and the insulating film 32 can be selectively formed on the first region 111 and the third region 113 of the semiconductor substrate 10, respectively.
- the conductive film 21 is formed on the second region 112 using the lift-off method.
- a resist 84 is applied over the entire main surface 11 .
- the resist 84 may be positive.
- the portion of the resist 84 above the first region 111 and the portion above the third region 113 are exposed to form photosensitive portions 841 and 842 .
- the portion of the resist 84 other than the photosensitive portions 841 and 842, that is, the portion above the second region 112 is removed by development.
- a film 23 made of the material of the conductive film 21 is deposited all over the main surface 11 by vapor deposition, for example. At this time, the film 23 is deposited on the second region 112 exposed from the resist 84 and on the resist 84 in the first region 111 and the third region 113 .
- the Ti film is formed first, followed by the Au film.
- the Ti film may be formed first, then the Pt film may be formed, and then the Au film may be formed.
- the resist 84 is peeled off and removed, leaving only the film 23, that is, the conductive film 21, on the second region 112.
- FIG. 17 the resist 84 is peeled off and removed, leaving only the film 23, that is, the conductive film 21, on the second region 112.
- metal pads 41 and 42 are formed on the insulating films 31 and 32 using the lift-off method.
- a resist 85 is applied all over the main surface 11 .
- the resist 85 is negative type in the following description, the resist 85 may be positive type.
- a portion of the resist 85 on the conductive film 21 is exposed to form a photosensitive portion 851 .
- the portions of the resist 85 other than the photosensitive portions 851, that is, the portions on the insulating films 31 and 32 are removed by development.
- a film 44 made of the material of the metal pads 41 and 42 is deposited all over the main surface 11 by vapor deposition, for example.
- the film 44 is deposited on the insulating films 31 and 32 exposed from the resist 85 and on the photosensitive portion 851 of the resist 85 .
- the resist 85 is peeled off and removed, leaving only the film 44 on the insulating films 31 and 32, that is, the metal pads 41 and 42.
- a back surface metal film 51 is formed on the back surface 12 of the semiconductor substrate 10 by vapor deposition, for example.
- a capacitor is used to match the input impedance and output impedance of a semiconductor element built into the electronic device.
- a member having a ceramic substrate 91 and metal pads 92 provided on the ceramic substrate 91 is placed on a conductive base 60.
- the base 60 is set at a constant potential, for example, a common ground potential with the semiconductor element.
- the metal pads 92 are connected by wires 72 to signal input terminals or signal output terminals of the semiconductor element, and are connected by wires 73 to signal input terminals or signal output terminals of a housing housing the semiconductor element.
- a return current Jr flows through the base 60 .
- a semiconductor substrate 95 having an insulating film 96 formed thereon instead of the ceramic substrate 91 of FIG.
- a silicon oxide film formed on a silicon substrate and having metal pads thereon is called a MOS capacitor.
- the capacitor 90 having the insulating film 96 on the semiconductor substrate 95 and the metal pad 92 thereon is used in a high-frequency electronic device, the following problems arise.
- the signal frequency is relatively low
- the return current Jr mainly flows inside the base 60 and hardly flows through the semiconductor substrate 95 .
- the signal frequency is relatively high, for example, 100 MHz or more
- the return current Jr mainly flows through a region 951 near the upper surface of the semiconductor substrate 95 due to the so-called skin effect, as shown in FIG. flow.
- FIG. 27 is a graph showing the relationship between the thickness of the region 951, the so-called skin depth, and the signal frequency when the semiconductor substrate 95 is made of silicon.
- the electrical resistivity of silicon is 2.0 ⁇ 10 ⁇ 5 ⁇ m.
- the vertical axis indicates the skin thickness ( ⁇ m) and the horizontal axis indicates the frequency (GHz).
- the higher the signal frequency the smaller the skin depth.
- the semiconductor substrate 95 preferably has a thickness of 100 ⁇ m or more in order to reduce cracks, the area 951 due to the skin effect is concentrated near the upper surface of the semiconductor substrate 95 .
- the return current Jr flows inside the semiconductor substrate 95, the return current Jr is affected by the electrical resistance of the semiconductor substrate 95, and the high frequency signal is attenuated.
- FIG. 28 is a diagram showing an example in which two capacitors 90 having the configuration shown in FIG. 25 are arranged in series.
- the metal pad 92 of one capacitor 90 is connected by a wire 72 to the signal input terminal or signal output terminal of the semiconductor device.
- a metal pad 92 of the other capacitor 90 is connected by a wire 73 to a signal input terminal or a signal output terminal of the housing containing the semiconductor element.
- the metal pads 92 of one capacitor 90 and the metal pads 92 of the other capacitor 90 are connected to each other by wires 71 .
- an internal matching circuit is configured by combining the capacitance of the two capacitors 90 and the inductance of the three wires 71, 72 and 73, and the input impedance or output of the semiconductor element Impedance matching is further improved. Also in such a configuration, the return current Jr flows near the upper surface of the semiconductor substrate 95 of each capacitor 90 due to the skin effect.
- the thickness of the insulating film 96 should be reduced and the width of the semiconductor substrate 95 in the traveling direction of the return current Jr should be minimized. is valid. Thereby, the path of the return current Jr in the semiconductor substrate 95 can be shortened while ensuring the required capacitance of each capacitor 90 .
- the width of the semiconductor substrate 95 is reduced, cracks are more likely to occur in the semiconductor substrate 95, and handling of the capacitor 90 becomes more difficult, for example, rotation error occurs in the capacitor 90 when assembling an electronic device.
- the capacitor 1 of the present embodiment is provided with the conductive film 21 on the main surface 11 of the semiconductor substrate 10 in addition to the insulating films 31 and 32 and the metal pads 41 and 42 for obtaining capacitance. ing.
- the conductive film 21 is provided along with the insulating films 31 and 32 and the metal pads 41 and 42 and is ohmic-connected to the main surface 11 of the semiconductor substrate 10 . Therefore, as shown in FIG. 31, the high-frequency return current Jr mainly flows near the main surface 11 of the semiconductor substrate 10 in the first region 111 and the third region 113, but in the second region 112, It mainly flows inside the conductive film 21 that is in ohmic contact with the main surface 11 of the semiconductor substrate 10 .
- the path of the return current Jr in the semiconductor substrate 10 can be shortened while ensuring a sufficient width Wa of the semiconductor substrate 10 to solve the problems of cracks and the difficulty of handling the capacitor 90 . Therefore, according to the capacitor 1 of the present embodiment, attenuation of high frequency signals can be suppressed.
- a curve G1 in FIG. 32 shows S21 transmission characteristics of case A in which the capacitor 1 of the present embodiment is applied to an input matching circuit of an RF amplifier using a semiconductor element as a transistor.
- FIG. 32 also shows a curve G2 and a curve G3 for comparison.
- a curve G2 shows the S21 transmission characteristics of case B in which the ceramic substrate 91 is used instead of the semiconductor substrate (see FIG. 24).
- a curve G3 shows the S21 transmission characteristics of case C, which is the case where the conductive film 21 is not provided on the semiconductor substrate (see FIG. 30).
- the vertical axis indicates the amplification factor (dB) and the horizontal axis indicates the signal frequency (GHz). Table 1 below shows the maximum gain at 2.2 GHz for these cases A, B and C.
- the attenuation of the amplification factor of the RF amplifier is greater than when the ceramic substrate 91 is used. Attenuation of the amplification factor of the RF amplifier can be reduced compared to the case where is not provided.
- the capacitor 1 includes the insulating film 32 and the metal pad 42 provided on the third region 113 in addition to the insulating film 31 and the metal pad 41 provided on the first region 111 .
- the conductive film 21 on the second region 112 may be positioned between the set of the insulating film 31 and the metal pad 41 and the set of the insulating film 32 and the metal pad 42 .
- a matching circuit having two stages of capacitor portions and inductance therebetween can be realized by a single capacitor element.
- the width Wd of the conductive film 21 in the direction D1 may be larger than the width Wc of the metal pads 41 and 42 in the same direction.
- the width Wc of the metal pad 41 and increasing the width Wd of the conductive film 21 the portion of the path of the return current Jr within the semiconductor substrate 10 is shortened and the portion within the conductive film 21 is shortened. can be longer. Therefore, attenuation of high-frequency signals can be effectively reduced while ensuring a sufficient width Wa of the semiconductor substrate 10 .
- the conductive film 21 may be made of metal as in this embodiment. In this case, the conductive film 21 having an electrical resistivity lower than that of the semiconductor substrate 10 can be easily formed.
- the conductive film 21 may include a Ti film 211 in contact with the silicon substrate and an Au film 212 provided on the Ti film 211, as shown in FIG. In this case, the semiconductor substrate 10 and the conductive film 21 can be firmly bonded, and the reliability of the capacitor 1 can be improved.
- a Pt film 213 may be provided between the Ti film 211 and the Au film 212 as shown in FIG.
- the capacitor 1 may include a backside metal film 51 provided on the backside 12 of the semiconductor substrate 10 and in contact with the semiconductor substrate 10 .
- the back surface metal film 51 and the base 60 can be easily and firmly electrically connected by using the conductive paste 74 or the like.
- the electrical resistivity of the semiconductor substrate 10 may be 1.0 ⁇ 10 ⁇ 4 ⁇ cm or more and 1 ⁇ cm or less.
- the capacitor 1 of this embodiment is particularly effective when using a semiconductor substrate 10 having such electrical resistivity, typically a silicon substrate.
- the metal pads 41, 42 extend along the direction D2, and the length Lc of the metal pads 41, 42 in the direction D2 is greater than the width Wc of the metal pads 41, 42 in the direction D1.
- the metal pad 41 has a long planar shape in the direction D2 that intersects the direction D1 that is the traveling direction of the current. electronic devices.
- the manufacturing method of the capacitor 1 described above includes a step of forming the SiN mask 83, a step of forming a silicon oxide film, a step of forming the conductive film 21, and a step of forming the metal pads 41 and 42.
- the SiN mask 83 having openings 831 and 832 in the first region 111 and the third region 113 is formed on the main surface 11 of the silicon substrate as the semiconductor substrate 10 .
- silicon oxide films are formed as the insulating films 31 and 32 in the first region 111 and the third region 113 of the main surface 11 .
- the conductive film 21 is formed so as to be in ohmic contact with the main surface 11 of the semiconductor substrate 10 .
- the conductive film 21 is formed in the second region 112 of the main surface 11 of the semiconductor substrate 10 using the lift-off method.
- the metal pads 41 and 42 are formed on the silicon oxide film using the lift-off method.
- a silicon oxide film can be easily formed by thermally oxidizing the surface of the silicon substrate.
- a silicon oxide film can be formed on the surface of the silicon substrate by placing the silicon substrate in an oxygen atmosphere and heating it to a temperature within the range of 700°C to 1100°C.
- a SiN mask 83 is formed as an anti-oxidation mask, and a silicon oxide film is selectively formed using the SiN mask 83 in a region where a capacitor is to be formed. According to this method, the capacitor 1 of this embodiment can be easily manufactured.
- FIG. 33 is a cross-sectional view showing the structure of a capacitor 2 as a passive element according to the first modified example of the embodiment.
- 34 is a plan view of the capacitor 2.
- FIG. The capacitor 2 of this modified example differs from the capacitor 1 of the above-described embodiment in the following respects, but is the same in other respects.
- the main surface 11 of the semiconductor substrate 10 of the capacitor 2 further includes a fourth region 114 and a fifth region 115 in addition to the first region 111 , the second region 112 and the third region 113 .
- the first area 111, the second area 112, the third area 113, the fourth area 114, and the fifth area 115 are arranged in this order along the direction D1. That is, the fourth region 114 is arranged between the third region 113 and the fifth region 115 .
- the capacitor 2 further includes a conductive film 22 (second conductive film), an insulating film 33 (third insulating film), and a metal pad 43 (third metal pad).
- the conductive film 22 is provided on the fourth region 114 on the main surface 11 of the semiconductor substrate 10 .
- Conductive film 22 is in ohmic contact with main surface 11 of semiconductor substrate 10 and has an electrical resistivity lower than that of semiconductor substrate 10 .
- the planar shape of the conductive film 22 may be the same as the planar shape of the conductive film 21 .
- the constituent material of the conductive film 22 is selected from, for example, those exemplified as the constituent materials of the conductive film 21 . In one embodiment, the constituent material of the conductive film 22 is the same as the constituent material of the conductive film 21 .
- the thickness, the width in the direction D1, and the length in the direction D2 of the conductive film 22 are included, for example, in the numerical ranges illustrated for the thickness Td, width Wd, and length Ld of the conductive film 21, respectively. In one embodiment, the thickness, width in direction D1, and length in direction D2 of conductive film 22 are equal to thickness Td, width Wd, and length Ld of conductive film 21, respectively.
- the insulating film 33 is provided on the fifth region 115 on the main surface 11 of the semiconductor substrate 10 .
- the planar shape of the insulating film 33 may be the same as the planar shapes of the insulating films 31 and 32 .
- the constituent material of the insulating film 33 is selected from, for example, those exemplified as the constituent materials of the insulating films 31 and 32 . In one embodiment, the constituent material of the insulating film 33 is the same as the constituent material of the insulating films 31 and 32 .
- the thickness of the insulating film 33 is included in the numerical range illustrated for the thickness Tb of the insulating films 31 and 32, for example. In one embodiment, the thickness of insulating film 33 is equal to the thickness Tb of insulating films 31 and 32 .
- the metal pad 43 is a metal pad for wire bonding and is provided on the insulating film 33 .
- the planar shape of the metal pad 43 may be the same as the planar shape of the metal pads 41 and 42 .
- the constituent material of the metal pad 43 is selected from, for example, those exemplified as the constituent materials of the metal pads 41 and 42 . In one embodiment, the material of metal pad 43 is the same as the material of metal pads 41 and 42 .
- the thickness, width in direction D1, and length in direction D2 of metal pad 43 are, for example, included in the numerical ranges illustrated for thickness Tc, width Wc, and length Lc of metal pads 41 and 42, respectively. be In one embodiment, the thickness, width in direction D1, and length in direction D2 of metal pad 43 are equal to thickness Tc, width Wc, and length Lc of metal pads 41 and 42, respectively.
- One end of a conductive wire 75 is bonded to the metal pad 42 instead of the wire 73 .
- the other end of wire 75 is bonded to metal pad 43 .
- the metal pad 42 and the metal pad 43 are electrically connected by the wire 75 .
- One end of a wire 73 is bonded to the metal pad 43 .
- the other end of the wire 73 is bonded to, for example, a signal input terminal or a signal output terminal of a housing (not shown). Thereby, the metal pad 43 is electrically connected to the signal input terminal or signal output terminal of the housing by the wire 73 .
- FIG. 35 is a plan view showing a capacitor 3 as a passive element according to the second modified example of the embodiment.
- the capacitor 3 of this modified example differs from the capacitor 1 of the above-described embodiment in the following respects, but is the same in other respects.
- the capacitor 3 includes metal pads 45 instead of the metal pads 41 of the above embodiment.
- the capacitor 3 includes metal pads 46 instead of the metal pads 42 of the above embodiment.
- the capacitor 3 includes a conductive film 25 instead of the conductive film 21 of the above embodiment.
- the arrangement and constituent materials of the metal pads 45 and 46 and the conductive film 25 are the same as the arrangement and constituent materials of the metal pads 41 and 42 and the conductive film 21 in the above embodiment. In the figure, the metal pads 45 and 46 and the conductive film 25 are hatched for easy understanding.
- the metal pad 45 has one or more protrusions 451 (first protrusions) that protrude toward the metal pad 46 from the side facing the metal pad 46 .
- the conductive film 25 has the same number of recesses 251 (first recesses) as the protrusions 451 surrounding each protrusion 451 from three sides on the side facing the metal pad 45 .
- the metal pad 46 has one or a plurality of protrusions 461 (second protrusions) protruding from the side facing the metal pad 45 toward the protrusion 451 .
- Four projections 461 are illustrated in the drawing.
- the conductive film 25 has the same number of recesses 252 (second recesses) as the protrusions 461 surrounding each protrusion 461 from three sides on the side facing the metal pad 46 .
- a width Wf of the protrusions 451 and 461 in the direction D2 is, for example, 40 ⁇ m or more and 100 ⁇ m or less.
- a projection length Lf of the projections 451 and 461 in the direction D1 is, for example, 500 ⁇ m.
- a width Wg of a gap between the convex portions 451, 461 and the concave portions 251, 252 in the direction D1 is, for example, 5 ⁇ m or more and 200 ⁇ m or less.
- a width Wh of a gap between the convex portions 451, 461 and the concave portions 251, 252 in the direction D2 is, for example, 5 ⁇ m or more and 50 ⁇ m or less.
- the planar shape of the insulating film 31 and the first region 111 matches the planar shape of the metal pad 45 .
- the planar shape of the insulating film 32 and the third region 113 (see FIG. 1) matches the planar shape of the metal pad 46 .
- the planar shape of the second region 112 matches the planar shape of the conductive film 25 .
- FIG. 36 and 37 are plan views showing modes in which wires 71 are connected to metal pads 45 and 46.
- FIG. FIG. 36 shows a case where one end of the wire 71 is bonded near the tip of the projection 451 and the other end of the wire 71 is bonded near the tip of the projection 461 . In this case, the length of wire 71 can be shortened.
- FIG. 37 shows a case where one end of the wire 71 is bonded near the proximal end of the projection 451 and the other end of the wire 71 is bonded near the proximal end of the projection 461 . In this case, the length of wire 71 can be increased.
- the end of the wire 71 connecting the metal pad 45 and the metal pad 46 can be bonded to the projections 451 and 461, and the length of the wire 71 can be adjusted.
- the width of the first region 111 in the traveling direction of the return current Jr (see FIG. 31) can be kept narrow in the other portions of the first region 111 excluding the portion immediately below the projection 451 .
- the width of the second region 112, that is, the width Wd of the conductive film 25 can be kept wide.
- the width of the third region 113 in the traveling direction of the return current Jr can be kept narrow in the other portions of the third region 113 excluding the portion immediately below the projection 461 .
- the width of the second region 112, that is, the width Wd of the conductive film 25 can be kept wider. Therefore, the length of the wire 71, that is, the degree of freedom for the magnitude of the inductance is increased, and the attenuation of the high-frequency signal can be effectively reduced.
- FIG. 38 is a cross-sectional view showing the structure of a capacitor 4 as a passive element according to the third modified example of the embodiment.
- 39 is a plan view of the capacitor 4.
- FIG. The capacitor 4 of this modified example differs from the capacitor 1 of the above-described embodiment in the following respects, but is the same in other respects.
- the capacitor 4 includes a conductive film 24 instead of the conductive film 21 of the above embodiment.
- the conductive film 24 is provided on a region including the first region 111 , the second region 112 and the third region 113 on the main surface 11 of the semiconductor substrate 10 .
- the conductive film 24 is provided over the entire main surface 11 of the semiconductor substrate 10 .
- Conductive film 24 is in ohmic contact with main surface 11 of semiconductor substrate 10 .
- the conductive film 24 has an electrical resistivity smaller than that of the semiconductor substrate 10 .
- the constituent material of the conductive film 24 is selected from, for example, those exemplified as the constituent materials of the conductive film 21 .
- the thickness of the conductive film 24 is included in the numerical range illustrated for the thickness Td of the conductive film 21, for example.
- the insulating film 31 is provided on the first region 111 and on the conductive film 24 .
- the insulating film 32 is provided on the third region 113 and on the conductive film 24 .
- the upper surface of the portion of the conductive film 24 above the second region 112 is exposed from the insulating films 31 and 32 .
- the conductive film 24 is electrically connected to the base 60 through the semiconductor substrate 10 and has the same potential as the base 60. and metal pads 41, 42.
- This capacitance depends on the area of the metal pads 41,42 and the distance from the metal pads 41,42 to the conductive film 24, typically the thickness of the insulating films 31,32. Therefore, when the metal pads 41 and 42 are connected to the signal terminals of the semiconductor element by the wires 71 and 72, the input impedance or output impedance at the signal terminals can be matched.
- the conductive film 24 in contact with the main surface 11 of the semiconductor substrate 10 is provided from the first region 111 to the third region 113 via the second region 112 . Therefore, the high-frequency return current Jr (see FIG. 31) mainly flows through the conductive film 24 in any of the first region 111, the second region 112, and the third region 113.
- FIG. 31 the path of the return current Jr in the semiconductor substrate 10 can be shortened while ensuring a sufficient width Wa (see FIG. 2) of the semiconductor substrate 10 . Therefore, according to this modified example, the attenuation of the high frequency signal can be suppressed.
- the capacitor 4 includes the insulating film 32 and the metal pad 42 provided on the third region 113 in addition to the insulating film 31 and the metal pad 41 provided on the first region 111 . You may prepare. Second region 112 may then be positioned between first region 111 and third region 113 . In this case, by connecting the metal pads 41 and 42 with the wire 71, a matching circuit having two stages of capacitor portions and inductance therebetween can be realized by a single capacitor element. (Second embodiment)
- FIG. 40 is a plan view showing the configuration of the electronic device 5 according to the second embodiment.
- 41 is a view showing a cross section along line XXXXI-XXXI in FIG. 40.
- FIG. The electronic device 5 according to the present embodiment receives a high-frequency signal having a fundamental frequency of, for example, 100 MHz or higher, amplifies the high-frequency signal, and outputs the amplified signal.
- the electronic device 5 includes a housing 63 , an input matching circuit 101 , a transistor element 102 and an output matching circuit 103 .
- the housing 63 has a base 60, end walls 64, 65 and side walls 66, 67, and a lid 68 (see Figure 41).
- End walls 64 , 65 and side walls 66 , 67 are made of an insulating material, for example a multi-layer ceramic material, and are mounted on base 60 .
- the base 60 has a planar shape such as a substantially rectangular shape, and has an input matching circuit 101, a transistor element 102, and an output matching circuit 103 mounted thereon.
- the end walls 64, 65 are aligned in direction D1 and extend along direction D2.
- Side walls 66, 67 are aligned in direction D2 and extend along direction D1.
- the housing 63 further has a signal input terminal 631 for inputting a high frequency signal and a signal output terminal 632 for outputting the amplified high frequency signal.
- a signal input terminal 631 is provided on the end wall 64 and a signal output terminal 632 is provided on the end wall 65 .
- the input matching circuit 101, the transistor element 102, and the output matching circuit 103 are arranged in this order in the direction D1.
- Input matching circuit 101, transistor element 102, and output matching circuit 103 are arranged between end walls 64 and 65 in direction D1 and between sidewalls 66 and 67 in direction D2.
- Input matching circuit 101, transistor element 102, and output matching circuit 103 are surrounded by end walls 64,65 and sidewalls 66,67.
- a lid 68 is disposed on the upper surfaces of the end walls 64 , 65 and sidewalls 66 , 67 to hermetically seal the space containing the input matching circuit 101 , the transistor element 102 and the output matching circuit 103 .
- the lid 68 is made of ceramic or metal, for example.
- the transistor element 102 is an example of a semiconductor element in this embodiment, such as a field effect transistor (FET).
- Transistor element 102 is arranged between input matching circuit 101 and output matching circuit 103 in direction D1.
- the transistor element 102 incorporates, for example, a plurality of transistors for high frequency amplification.
- the transistor element 102 has a semiconductor substrate 1020, a plurality of signal input electrodes 1021 and a plurality of signal output electrodes 1022 which are signal electrodes, and a ground electrode 1023 (see FIG. 41).
- the plurality of signal input electrodes 1021 are arranged along the direction D2 at the edge of the main surface of the semiconductor substrate 1020 near the input matching circuit 101 .
- the plurality of signal output electrodes 1022 are arranged along the direction D2 at the edge of the main surface of the semiconductor substrate 1020 near the output matching circuit 103 .
- a ground electrode 1023 is provided on the back surface of the semiconductor substrate 1020 .
- the signal input electrode 1021 is connected to the control terminal (gate) of the transistor
- the signal output electrode 1022 is connected to one current terminal (drain) of the transistor
- the ground electrode 1023 is connected to the other current terminal (source) of the transistor. It is connected to the.
- the ground electrode 1023 is conductively joined to the mounting surface 61 of the base 60 with a conductive paste (not shown).
- the input matching circuit 101 has the capacitor 1 of the first embodiment, multiple wires 71 (first wires), multiple wires 72 (second wires), and multiple wires 73 .
- Metal pads 41 and 42 of capacitor 1 are electrically connected to each other by a plurality of wires 71 .
- Metal pads 41 of capacitor 1 are electrically connected to signal input electrodes 1021 of transistor element 102 by wires 72 .
- Metal pads 42 of capacitor 1 are electrically connected to signal input terminals 631 of housing 63 by a plurality of wires 73 .
- the back metal film 51 of the capacitor 1 is conductively joined to the mounting surface 61 of the base 60 with a conductive paste (not shown).
- the input impedance of transistor element 102 is matched by the capacitance that metal pads 41 and 42 have and the inductance that wires 71, 72, and 73 have.
- the input matching circuit 101 may have the capacitor 2 of the first modified example, the capacitor 3 of the second modified example, or the capacitor 4 of the fourth modified example instead of the capacitor 1 of the first embodiment.
- the output matching circuit 103 has a capacitor 90, a plurality of wires 76, and a plurality of wires 77 shown in FIG.
- the metal pad 92 of the output matching circuit 103 is electrically connected to the signal output electrode 1022 of the transistor element 102 by a plurality of wires 76 and electrically connected to the signal output terminal 632 of the housing 63 by a plurality of wires 77.
- the back metal film 97 of the capacitor 90 is conductively joined to the mounting surface 61 of the base 60 with a conductive paste (not shown).
- the capacitance of metal pad 92 and the inductance of wires 76 and 77 match the output impedance of transistor element 102 .
- the output matching circuit 103 uses the ceramic capacitor shown in FIG. 24 instead of the capacitor 90, the capacitor 1 of the first embodiment, the capacitor 2 of the first modification, the capacitor 3 of the second modification, or the of capacitors 4.
- the input matching circuit 101 has the capacitor 1 of the first embodiment, the capacitor 2 of the first modification, the capacitor 3 of the second modification, or the capacitor 4 of the fourth modification.
- the output matching circuit 103 has the capacitor 1 of the first embodiment, the capacitor 2 of the first modification, the capacitor 3 of the second modification, or the capacitor 4 of the fourth modification, attenuation of high frequency signals is further suppressed. can do.
- FIG. 42 is a plan view showing the configuration of the electronic device 6 according to the third embodiment.
- the electronic device 6 receives a high-frequency signal, amplifies the high-frequency signal, and outputs the amplified high-frequency signal.
- the electronic device 6 includes a housing 63, two transistor elements 102, branch circuit boards 106 and 107, two input matching circuits 101, two output matching circuits 103, and a combining circuit board 108. and 109.
- the configuration and arrangement of the housing 63, each input matching circuit 101, each transistor element 102, and each output matching circuit 103 are the same as in the second embodiment.
- the branch circuit boards 106 and 107 are arranged side by side in the direction D1 and arranged between the signal input terminal 631 and the input matching circuit 101 in the direction D1.
- the branch circuit board 106 is located on the signal input terminal 631 side
- the branch circuit board 107 is located on the input matching circuit 101 side.
- the branch circuit board 106 has a ceramic substrate 1061 and a branch circuit 1062 provided on the main surface of the substrate 1061 .
- the branch circuit board 107 has a ceramic substrate 1071 and a branch circuit 1072 provided on the main surface of the substrate 1071 .
- a metal film (not shown) is adhered to the rear surface of the substrates 1061 and 1071, and the metal film is joined to the base 60 with a metal paste.
- Branch circuits 1062 and 1072 are branch circuits for the input matching circuit 101 .
- Branch circuit 1062 includes wiring pattern 1063 provided on the main surface of substrate 1061 .
- the wiring pattern 1063 is electrically connected to the signal input terminal 631 by the wire 701 .
- the wiring pattern 1063 branches in two directions starting from the connection point with the wire 701 .
- Branch circuit 1072 includes two wiring patterns 1073 provided on the main surface of substrate 1071 .
- Each wiring pattern 1073 is electrically connected to each of two branched ends of the wiring pattern 1063 via a wire 702 .
- Each wiring pattern 1073 repeats branching starting from the connection point with the wire 702 and finally reaches four metal pads 1070 respectively.
- Adjacent metal pads 1070 are connected to each other via film resistors 1074 to form a Wilkinson coupler.
- Metal pad 1070 is electrically connected to metal pad 42 of input matching circuit 101 by wire 73 .
- the multiplexing circuit boards 108 and 109 are arranged side by side in the direction D1 and arranged between the output matching circuit 103 and the signal output terminal 632 in the direction D1.
- the multiplexing circuit board 108 is located on the output matching circuit 103 side
- the multiplexing circuit board 109 is located on the signal output terminal 632 side.
- the multiplexing circuit board 108 has a substrate 1081 made of ceramic and a multiplexing circuit 1082 provided on the main surface of the substrate 1081 .
- the multiplexing circuit board 109 has a substrate 1091 made of ceramic and a multiplexing circuit 1092 provided on the main surface of the substrate 1091 .
- a metal film (not shown) is adhered to the rear surface of the substrates 1081 and 1091, and the metal film is joined to the base 60 with a metal paste.
- Multiplexing circuits 1082 and 1092 are multiplexing circuits for the output matching circuit 103 .
- Multiplexing circuit 1082 includes two wiring patterns 1083 provided on the main surface of substrate 1081 .
- Each wiring pattern 1083 includes four metal pads 1080 respectively. Adjacent metal pads 1080 are connected to each other via film resistors 1084 to form a Wilkinson coupler.
- Each metal pad 1080 is electrically connected to metal pad 92 of output matching circuit 103 via wire 77 .
- Each wiring pattern 1083 repeats coupling from the four metal pads 1080 and finally reaches a connection point with the wire 703 .
- Each wiring pattern 1083 is electrically connected to each of the two ends of the wiring pattern 1093 of the multiplexing circuit 1092 via a wire 703 .
- a central portion of the wiring pattern 1093 is electrically connected to the signal output terminal 632 via the wire 704 .
- the input matching circuit 101 includes the capacitor 1 of the first embodiment, the capacitor 2 of the first modification, the capacitor 3 of the second modification, or the By providing the capacitor 4 of the four modified examples, attenuation of high frequency signals can be suppressed.
- the passive elements and electronic devices according to the present disclosure are not limited to the above-described embodiments, and various modifications are possible.
- the embodiments and modifications described above may be combined with each other according to the desired purpose and effect.
- the third region 113, insulating film 32, metal pad 42 and wire 71 may be omitted if desired. In that case, one end of wire 73 is bonded to metal pad 41 .
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Abstract
Description
一実施形態に係る第1の受動素子は、半導体基板と、第1の絶縁膜と、第1の金属パッドと、第1の導電体と、第1の導電膜と、を備える。半導体基板は、p型又はn型の導電型を有し、主面及び裏面を有する。第1の絶縁膜は、半導体基板の主面における第1の領域上に設けられている。第1の金属パッドは、第1の絶縁膜上に設けられた金属パッドである。第1の導電体は、第1の金属パッドから第1方向に延びている。第1の導電膜は、半導体基板の主面において第1の領域と第1方向に隣接する第2の領域上に設けられている。第1の導電膜は、半導体基板の主面とオーミック接続し、半導体基板の電気抵抗率よりも小さい電気抵抗率を有する。
[本発明の実施形態の詳細]
(第1実施形態)
(第1変形例)
(第2変形例)
(第3変形例)
(第2実施形態)
(第3実施形態)
5,6…電子装置
10…半導体基板
11…主面
12…裏面
13,14…側面
21,22,21A,21B,24,25…導電膜
23…膜
31,32,33…絶縁膜
41,42,43,45,46…金属パッド
44…膜
51…裏面金属膜
60…ベース
61…搭載面
63…筐体
64,65…端壁
66,67…側壁
68…リッド
71,72,73,75,76,77…ワイヤ
74…導電性ペースト
81…SiN膜
82,84,85…レジスト
83…SiNマスク
90…キャパシタ
91…セラミック基板
92…金属パッド
95…半導体基板
96…絶縁膜
97…裏面金属膜
101…入力整合回路
102…トランジスタ素子
103…出力整合回路
106,107…分岐回路基板
108,109…合波回路基板
111…第1の領域
112…第2の領域
113…第3の領域
114…第4の領域
115…第5の領域
211…Ti膜
212…Au膜
213…Pt膜
251,252…凹部
451,461…凸部
631…信号入力端子
632…信号出力端子
701,702,703,704…ワイヤ
821,841,842,851…感光部
831,832…開口
951…領域
1020…半導体基板
1021…信号入力電極
1022…信号出力電極
1023…接地電極
1061,1071,1081,1091…基板
1062,1072…分岐回路
1063,1073…配線パターン
1070,1080…金属パッド
1074,1084…膜抵抗
1082,1092…合波回路
1083,1093…配線パターン
D1,D2…方向
G1,G2,G3…曲線
Ga…隙間
Jr…戻り電流
Js…信号電流
Claims (12)
- p型又はn型の導電型を有し、主面及び裏面を有する半導体基板と、
前記半導体基板の前記主面における第1の領域上に設けられた第1の絶縁膜と、
前記第1の絶縁膜上に設けられた第1の金属パッドと、
前記第1の金属パッドから第1方向に延びている第1の導電体と、
前記半導体基板の前記主面において前記第1の領域と前記第1方向に隣接する第2の領域上に設けられ、前記半導体基板の前記主面とオーミック接続し、前記半導体基板の電気抵抗率よりも小さい電気抵抗率を有する第1の導電膜と、
を備える、受動素子。 - 前記半導体基板の前記主面において前記第2の領域と前記第1方向に隣接する第3の領域上に設けられた第2の絶縁膜と、
前記第2の絶縁膜上に設けられた第2の金属パッドと、
を更に備え、
前記第2の領域は、前記第1の領域と前記第3の領域との間に位置する、請求項1に記載の受動素子。 - 前記第1の金属パッドは、前記第2の金属パッドに向けて突出する第1の凸部を有し、
前記第1の導電膜は、前記第1の凸部を三方から囲む第1の凹部を有する、請求項2に記載の受動素子。 - 前記第2の金属パッドは、前記第1の凸部に向けて突出する第2の凸部を有し、
前記第1の導電膜は、前記第2の凸部を三方から囲む第2の凹部を更に有する、請求項3に記載の受動素子。 - 前記半導体基板の前記主面における第4の領域上に設けられ、前記半導体基板の前記主面とオーミック接続し、前記半導体基板の電気抵抗率よりも小さい電気抵抗率を有する第2の導電膜と、
前記半導体基板の前記主面における第5の領域上に設けられた第3の絶縁膜と、
前記第3の絶縁膜上に設けられた第3の金属パッドと、
を更に備え、
前記第1の領域、前記第2の領域、前記第3の領域、前記第4の領域、及び前記第5の領域は、前記第1方向に沿ってこの順に並んでいる、請求項2から請求項4のいずれか1項に記載の受動素子。 - 前記第1方向における前記第1の導電膜の幅が、同方向における前記第1の金属パッドの幅より大きい、請求項1から請求項5のいずれか1項に記載の受動素子。
- p型又はn型の導電型を有し、主面及び裏面を有する半導体基板と、
前記半導体基板の前記主面において、第1の領域及び前記第1の領域と第1方向に隣接する第2の領域を含む領域上に設けられ、前記半導体基板の前記主面と接し、前記半導体基板の電気抵抗率よりも小さい電気抵抗率を有する導電膜と、
前記第1の領域上であって前記導電膜上に設けられた第1の絶縁膜と、
前記第1の絶縁膜上に設けられた第1の金属パッドと、
前記第1の金属パッドから前記第1方向に延びている第1の導電体と、
を備える、受動素子。 - 前記半導体基板の前記裏面上に設けられ、前記半導体基板と接する裏面金属膜を更に備える、請求項1から請求項7のいずれか1項に記載の受動素子。
- 前記半導体基板の電気抵抗率は1.0×10-4Ω・cm以上1Ω・cm以下である、請求項1から請求項8のいずれか1項に記載の受動素子。
- 前記第1の金属パッドは、前記第1方向と交差する第2方向に沿って延在し、
前記第2方向における前記第1の金属パッドの長さは、前記第1方向における前記第1の金属パッドの幅よりも大きい、請求項1から請求項9のいずれか1項に記載の受動素子。 - 信号端子及び導電性のベースを有する筐体と、
信号用電極、及び前記ベースに導電接合された接地電極を有し、前記ベース上に搭載された半導体素子と、
前記ベース上に搭載された、請求項1から請求項10のいずれか1項に記載の受動素子と、を備え、
前記受動素子の前記第1の金属パッドは、第2の導電体によって前記信号端子と電気的に接続され、
前記受動素子の前記半導体基板は、前記ベースと導電接合されている、電子装置。 -
信号端子及び導電性のベースを有する筐体と、
信号用電極、及び前記ベースに導電接合された接地電極を有し、前記ベース上に搭載された半導体素子と、
前記ベース上に搭載され、p型又はn型の導電型を有し、主面及び裏面を有する半導体基板と、前記半導体基板の前記主面における第1の領域上に設けられた第1の絶縁膜と、前記第1の絶縁膜上に設けられた第1の金属パッドと、前記第1の金属パッドに接続し、前記第1の金属パッドから第1方向に延びている第1の導電体と、前記半導体基板の前記主面において前記第1の領域と前記第1方向に隣接し前記第1の導電体の下に位置する第2の領域上に設けられ、前記半導体基板の前記主面とオーミック接続し、前記半導体基板の電気抵抗率よりも小さい電気抵抗率を有する第1の導電膜と、前記第2の領域と前記第1方向に隣接する第3の領域上に設けられた第2の絶縁膜と、前記第1の導電体と接続し、前記第2の絶縁膜上に設けられた第2の金属パッドと、を有する受動素子と、
前記受動素子の前記第1の金属パッドと前記信号端子とを電気的に接続する第2の導電体と、
前記受動素子の前記第2の金属パッドと前記半導体素子の前記信号用電極とを電気的に接続する第3の導電体と、
を備える、電子装置。
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09306935A (ja) * | 1996-05-17 | 1997-11-28 | Nec Corp | 半導体装置 |
JPH10125861A (ja) * | 1996-10-24 | 1998-05-15 | Sony Corp | 高周波増幅回路 |
US6331931B1 (en) * | 1999-04-09 | 2001-12-18 | Integra Technologies, Inc. | Radio frequency power device improvement |
JP2020129616A (ja) * | 2019-02-08 | 2020-08-27 | 住友電工デバイス・イノベーション株式会社 | 半導体モジュールの製造方法、及び半導体モジュール |
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2022
- 2022-06-09 WO PCT/JP2022/023341 patent/WO2022260141A1/ja active Application Filing
- 2022-06-09 CN CN202280041264.4A patent/CN117461133A/zh active Pending
- 2022-06-09 JP JP2023527930A patent/JPWO2022260141A1/ja active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09306935A (ja) * | 1996-05-17 | 1997-11-28 | Nec Corp | 半導体装置 |
JPH10125861A (ja) * | 1996-10-24 | 1998-05-15 | Sony Corp | 高周波増幅回路 |
US6331931B1 (en) * | 1999-04-09 | 2001-12-18 | Integra Technologies, Inc. | Radio frequency power device improvement |
JP2020129616A (ja) * | 2019-02-08 | 2020-08-27 | 住友電工デバイス・イノベーション株式会社 | 半導体モジュールの製造方法、及び半導体モジュール |
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CN117461133A (zh) | 2024-01-26 |
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