Patent Description:
<CIT> (Patent Document <NUM>) discloses a semiconductor device having a package board in which a part or whole of a passive element such as an inductor or a capacitor is embedded, and a voltage control device (hereinafter, also referred to as a "voltage regulator") including an active element such as a switching element. In the semiconductor device described in Patent Document <NUM>, the voltage regulator and a load to which a power supply voltage is to be supplied are mounted on the package board. A direct-current voltage adjusted by a voltage adjustment portion is smoothed by the passive element in the package board and supplied to the load.

<CIT> (Patent Document <NUM>) discloses a solid electrolytic capacitor array including a capacitor element group including a plurality of capacitor elements, one or two or more anode terminals respectively connected to one or two or more anode lead-out lines of the capacitor elements of the capacitor element group and extended, one or two or more cathode terminals connected to a cathode layer of the capacitor element and extended, and an exterior resin layer covering the capacitor elements, in which the anode terminals and the cathode terminals are configured as external terminals. <CIT> discloses a semiconductor composite device provided with a voltage regulator, a package substrate, and a load, which converts an input direct current voltage into a different direct current voltage, and supplies the direct current voltage to the load. <CIT> relates to chips or chip packages including one interconnection scheme at one side of a chip or chip package and/or another interconnection scheme at another side of a chip or chip package, e.g., an over-passivation scheme at a top of a chip and a bottom scheme at a bottom of the same chip. <CIT> relates to a capacitor array comprising; a plurality of solid electrolytic capacitor elements each of which has a first main surface and a second main surface facing each other in a thickness direction and includes an anode plate made of a valve action metal, a porous layer on at least one surface of the anode plate, a dielectric layer on a surface of the porous layer, and a cathode layer on a surface of the dielectric layer and including a solid electrolyte layer. <CIT> discloses a substrate suitable for use in high-density three-dimensional mounting or wiring in which silicon IC chips or the like are stacked.

The semiconductor device having the voltage regulator as described in Patent Document <NUM> is applied to, for example, electronic equipment such as a mobile phone or a smartphone. In recent years, downsizing and thinning of electronic equipment have been promoted, and accordingly, downsizing of a semiconductor device itself has been desired.

However, in the semiconductor device described in Patent Document <NUM>, when the connection distance between the voltage regulator and the load increases, loss due to wiring increases.

In particular, when the plurality of capacitors is arrayed using the method as described in Patent Document <NUM>, it is difficult to shorten the connection distance between the voltage regulator and the load, and each capacitor.

The present invention has been made to solve the aforementioned problems, and an object is to provide a module capable of reducing loss due to wiring by shortening a connection distance between a voltage regulator and a load.

The module of the present invention is used in a semiconductor composite device that supplies a direct-current voltage adjusted by a voltage regulator including a semiconductor active element to a load. The module includes a capacitor layer including at least one capacitor portion forming a capacitor, a connection terminal used for electrical connection with at least one of the voltage regulator and the load, and a through-hole conductor formed to penetrate the capacitor portion in a thickness direction of the capacitor layer. The capacitor is electrically connected to at least one of the load and the voltage regulator with the through-hole conductor interposed between the load and the voltage regulator. The through-hole conductor includes a first through-hole conductor formed in at least an inner wall surface of a first through-hole penetrating the capacitor portion in the thickness direction. The first through-hole conductor is electrically connected to an anode of the capacitor portion. The capacitor portion includes an anode plate including metal, and the first through-hole conductor is connected to an end surface of the anode plate. The module further comprises an anode connection layer that is provided between the first through-hole conductor and the end surface of the anode plate. The first through-hole conductor is connected to the end surface of the anode plate with the anode connection layer interposed between the first through-hole conductor and the end surface of the anode plate. When viewed in section from a direction orthogonal to the thickness direction, the first through-hole conductor of a portion where the anode connection layer is present protrudes inward in the first through-hole as compared with the first through-hole conductor of a portion where the anode connection layer is not present.

According to the present invention, the loss due to wiring can be reduced by shortening the connection distance between the voltage regulator and the load.

Hereinafter, a module of the present invention will be described.

However, the present invention is not limited to the configuration described below, but can be appropriately changed and applied without changing the gist of the present invention. Note that combinations of two or more of individual desirable configurations of the present invention described below are also the present invention.

The module of the present invention is used in a semiconductor composite device that supplies a direct-current voltage adjusted by a voltage regulator including a semiconductor active element to a load.

The module of the present invention includes a capacitor layer including at least one capacitor portion forming a capacitor, a connection terminal used for electrical connection with the voltage regulator and the load, and a through-hole conductor formed to penetrate the capacitor portion in a thickness direction of the capacitor layer. In the module of the present invention, the capacitor is electrically connected to the load and the voltage regulator with the through-hole conductor interposed between the load and the voltage regulator.

Hereinafter, as one embodiment of the module of the present invention, a package board will be described as an example.

In the package board according to one embodiment of the module of the present invention, the voltage regulator and the load are electrically connected with the through-hole conductor penetrating the capacitor portion interposed between the load and the voltage regulator. Thus, the connection distance between the voltage regulator and the load can be shortened, and as a result, the loss due to wiring can be reduced.

Further, by reducing an inductor component of the wiring portion by shortening the wiring formed on the package board, the switching speed can be increased, and the semiconductor composite device can be downsized.

In addition, since the interval between the wiring formed on the package board such as a signal line and a voltage-regulated power supply line is widened, noise propagation generated by capacitive coupling between the wirings or the like can be reduced, and stable operation of the system can be secured.

<FIG> is a block diagram illustrating an example of a semiconductor composite device used in the present invention.

The semiconductor composite device <NUM> illustrated in <FIG> includes a voltage regulator (VR) <NUM>, a package board <NUM>, and a load <NUM>. The load <NUM> is, for example, a semiconductor integrated circuit (IC) such as a logic operation circuit or a storage circuit.

The voltage regulator <NUM> includes an active element (not illustrated) such as a semiconductor switching element, and adjusts a direct-current voltage supplied from the outside to a voltage level suitable for the load <NUM> by controlling the duty of the active element.

The voltage regulator <NUM> and the load <NUM> are mounted on the surface of the package board <NUM>, and the semiconductor composite device <NUM> is configured as one package component. In the semiconductor composite device <NUM> illustrated in <FIG>, the inductor L1 and the capacitor CP1 are formed inside the package board <NUM>.

In the semiconductor composite device <NUM> illustrated in <FIG>, the inductor L1 is connected between an input terminal IN and an output terminal OUT of the package board <NUM>. The inductor L1 is connected to the voltage regulator <NUM> at the input terminal IN, and is connected to the load <NUM> at the output terminal OUT. The capacitor CP1 is connected between the output terminal OUT and a ground terminal GND. The voltage regulator <NUM>, and the inductor L1 and the capacitor CP1 in the package board <NUM> form a chopper-type step-down switching regulator. The inductor L1 and the capacitor CP1 function as a ripple filter of the step-down switching regulator. For example, a direct-current voltage of <NUM> V input from the outside is stepped down to <NUM> V by the switching regulator and supplied to the load <NUM>.

<FIG> is a block diagram illustrating another example of a semiconductor composite device used in the present invention.

In a semiconductor composite device 10A illustrated in <FIG>, a capacitor CP1 is formed inside a package board 200A. As illustrated in <FIG>, an inductor L1 may not be configured as a package component, but may be disposed between a voltage regulator <NUM> and a package component.

In the semiconductor composite device 10A illustrated in <FIG>, the inductor L1 is disposed between an input terminal IN of the package board 200A and the voltage regulator <NUM>. The capacitor CP1 is connected between output terminal OUT-input terminal IN and a ground terminal GND. The voltage regulator <NUM>, the inductor L1, and the capacitor CP1 in the package board 200A form a chopper-type step-down switching regulator. The inductor L1 and the capacitor CP1 function as a ripple filter of the step-down switching regulator. For example, a direct-current voltage of <NUM> V input from the outside is stepped down to <NUM> V by the switching regulator and supplied to the load <NUM>.

Note that, in addition to the voltage regulator <NUM> and the load <NUM>, electronic equipment such as a decoupling capacitor for noise countermeasures, a choke inductor, a surge protection diode element, and a voltage dividing resistance element may be mounted on the package board <NUM> or 200A.

Hereinafter, a detailed configuration of the semiconductor composite device <NUM> illustrated in <FIG> will be described.

<FIG> is a plan view schematically illustrating the semiconductor composite device <NUM> illustrated in <FIG> as viewed from a mounting surface of the package board <NUM>. <FIG> is a sectional view taken along line IV-IV of the semiconductor composite device <NUM> illustrated in <FIG>. <FIG> is a sectional view taken along line V-V of the semiconductor composite device <NUM> illustrated in <FIG>. <FIG> is a plan view of a portion of the capacitor layer <NUM> forming the capacitor CP1. <FIG> is a plan view of a portion of the inductor layer <NUM> forming the inductor L1.

As illustrated in <FIG>, a through-hole conductor <NUM> corresponding to the input terminal IN, a through-hole conductor <NUM> corresponding to the output terminal OUT, and a through-hole conductor <NUM> corresponding to the ground terminal GND are formed at three corners of the mounting surface of the package board <NUM>.

The voltage regulator <NUM> is disposed at a position overlapping the through-hole conductor <NUM>, and the load <NUM> is disposed at a position overlapping the through-hole conductor <NUM>. That is, the through-hole conductor <NUM> is formed at a position immediately below the voltage regulator <NUM>, and the through-hole conductor <NUM> is formed at a position immediately below the load <NUM>. In addition, as described above, pieces of electronic equipment <NUM> other than the voltage regulator <NUM> and the load <NUM> are mounted on the mounting surface of the package board <NUM>.

As illustrated in <FIG>, the package board <NUM> includes the capacitor layer <NUM> forming the capacitor CP1, the inductor layer <NUM> forming the inductor L1, and resin layers <NUM>, <NUM>, and <NUM>.

The resin layers <NUM>, <NUM>, and <NUM> are used as a bonding material for bonding the layers to each other, and are used as an insulating layer for insulating the exposed surfaces of the capacitor layer <NUM> and the inductor layer <NUM>. The capacitor layer <NUM> and the inductor layer <NUM> are bonded by the resin layer <NUM>. The resin layer <NUM> is formed on the top surface of the capacitor layer <NUM>, and the resin layer <NUM> is formed on the bottom surface of the inductor layer <NUM>. The resin layers <NUM>, <NUM>, and <NUM> include an insulating material such as a resin such as epoxy, polyimide, or phenol, or a mixed material of a resin such as epoxy, polyimide, or phenol and an inorganic filler such as silica or alumina. In order to ensure adhesion with the through-hole conductor, it is preferable to use a material mainly including epoxy as the resin layer.

A circuit layer <NUM> including lands for mounting the pieces of equipment such as the voltage regulator <NUM> and wiring for connecting them is formed on the surface of the resin layer <NUM>. The equipment mounted on the package board <NUM> is electrically connected to the lands or terminals of the circuit layer <NUM> with solder bumps <NUM> interposed between the equipment and the lands or terminals of the circuit layer <NUM>.

The circuit layer <NUM> includes a low-resistance metal material such as copper (Cu), gold (Au), or silver (Ag). Note that the circuit layer <NUM> is not limited to being formed only on the surface of the resin layer <NUM>, but may be formed, for example, across a plurality of layers inside the resin layer <NUM>. Note that the surfaces of the lands or terminals formed on the mounting surface of the circuit layer <NUM> are preferably subjected to surface treatment such as nickel/gold (Ni/Au) plating, nickel/lead/gold (Ni/Pb/Au) plating, or preflux treatment in order to facilitate mounting of the equipment. In addition, a solder resist layer may be formed on the outermost layer portion of the circuit layer <NUM> in order to prevent solder flow at the time of surface mounting of the equipment.

The capacitor layer <NUM> includes a capacitor portion <NUM> forming the capacitor CP1, a conductive portion <NUM> electrically connected to the through-hole conductor <NUM> of the output terminal OUT, a conductive portion <NUM> electrically connected to the through-hole conductor <NUM> of the ground terminal GND, and an insulating portion <NUM> provided around these.

In the present embodiment, the capacitor portion <NUM> includes an anode plate <NUM> including metal. For example, the anode plate <NUM> has a core portion <NUM> including a valve-acting metal. The anode plate <NUM> preferably has a porous portion <NUM> provided on at least one main surface of the core portion <NUM>. A dielectric layer (not illustrated) is provided on the surface of the porous portion <NUM>, and a cathode layer <NUM> is provided on the surface of the dielectric layer. Thus, in the present embodiment, the capacitor portion <NUM> forms an electrolytic capacitor.

When the capacitor portion <NUM> forms an electrolytic capacitor, the anode plate <NUM> includes a valve-acting metal exhibiting a so-called valve action. Examples of the valve-acting metal include a single metal such as aluminum, tantalum, niobium, titanium, or zirconium, or an alloy containing at least one type of these metals. Among them, aluminum or an aluminum alloy is preferable.

The shape of the anode plate <NUM> is preferably a flat plate shape, more preferably a foil shape. It is sufficient if the anode plate <NUM> has the porous portion <NUM> on at least one main surface of the core portion <NUM>, and the anode plate <NUM> may have the porous portion <NUM> on both main surfaces of the core portion <NUM>. The porous portion <NUM> is preferably a porous layer formed on the surface of the core portion <NUM>, and more preferably an etching layer.

The dielectric layer provided on the surface of the porous portion <NUM> is porous reflecting the surface state of the porous portion <NUM>, and has a fine uneven surface shape. The dielectric layer preferably includes an oxide film of the valve-acting metal. For example, when an aluminum foil is used as the anode plate <NUM>, a dielectric layer including an oxide film can be formed by performing anodic oxidation treatment (also referred to as chemical conversion treatment) on the surface of the aluminum foil in an aqueous solution containing ammonium adipate or the like.

The cathode layer <NUM> provided on the surface of the dielectric layer includes, for example, a solid electrolyte layer provided on the surface of the dielectric layer. The cathode layer <NUM> preferably further includes a conductor layer provided on the surface of the solid electrolyte layer.

Examples of the material constituting the solid electrolyte layer include conductive polymers such as polypyrroles, polythiophenes, and polyanilines. Among them, polythiophenes are preferable, and poly(<NUM>,<NUM>-ethylenedioxythiophene) called PEDOT is particularly preferable. In addition, the conductive polymer may contain a dopant such as polystyrene sulfonate (PSS). Note that the solid electrolyte layer preferably includes an inner layer filling pores (recesses) of the dielectric layer and an outer layer covering the dielectric layer.

The conductor layer includes at least one layer of a conductive resin layer and a metal layer. The conductor layer may be only the conductive resin layer or may be only the metal layer. The conductor layer preferably covers the whole surface of the solid electrolyte layer.

Examples of the conductive resin layer include a conductive adhesive layer containing at least one type of conductive filler selected from the group consisting of a silver filler, a copper filler, a nickel filler, and a carbon filler.

Examples of the metal layer include a metal plating film and a metal foil. The metal layer preferably includes at least one type of metal selected from the group consisting of nickel, copper, silver, and alloys containing these metals as main components. Note that the "main component" refers to an element component having the largest weight ratio of elements.

The conductor layer includes, for example, a carbon layer provided on the surface of the solid electrolyte layer and a copper layer provided on the surface of the carbon layer.

The carbon layer is provided to electrically and mechanically connect the solid electrolyte layer and the copper layer. The carbon layer can be formed in a predetermined region by applying a carbon paste onto the solid electrolyte layer by sponge transfer, screen printing, dispenser, inkjet printing, or the like.

The copper layer can be formed by printing a copper paste onto the carbon layer by sponge transfer, screen printing, spray application, dispenser, inkjet printing, or the like.

The conductive portions <NUM> and <NUM> mainly include a low-resistance metal such as Ag, Au, or Cu. For the purpose of improving adhesion force between layers, a conductive adhesive material obtained by mixing the conductive filler and a resin may be provided as the conductive portion.

The insulating portion <NUM> includes an insulating material such as a resin such as epoxy, phenol, or polyimide, or a mixed material of a resin such as epoxy, phenol, or polyimide and an inorganic filler such as silica or alumina.

As illustrated in <FIG> and <FIG>, a part of the porous portion <NUM> on the equipment mounting surface side is cut out to provide a cutout portion <NUM> in which the core portion <NUM> is exposed. In the cutout portion <NUM>, the core portion <NUM>, which is an anode of the capacitor portion <NUM>, is electrically connected to the conductive portion <NUM> and the through-hole conductor <NUM> with via conductors <NUM> interposed between the conductive portion <NUM> and the through-hole conductor <NUM>. Note that the core portion <NUM>, which is an anode of the capacitor portion <NUM>, may be directly connected to the through-hole conductor <NUM> on the end surface of the anode plate <NUM> without the via conductors <NUM> or the conductive portion <NUM> interposed between the core portion <NUM> and the through-hole conductor <NUM>.

In addition, as illustrated in <FIG>, the cathode layer <NUM>, which is a cathode of the capacitor portion <NUM>, is electrically connected to the conductive portion <NUM> and the through-hole conductor <NUM> with via conductors <NUM> interposed between the conductive portion <NUM> and the through-hole conductor <NUM>.

Note that, as the capacitor portion <NUM>, a ceramic capacitor using barium titanate or a thin film capacitor using silicon nitride (SiN), silicon dioxide (SiO<NUM>), hydrogen fluoride (HF), or the like can also be used. However, from the viewpoint of being capable of forming the capacitor portion <NUM> having a thinner thickness and a relatively large area and mechanical characteristics such as rigidity and flexibility of the package board <NUM>, the capacitor portion <NUM> is preferably a capacitor using a metal such as aluminum as a substrate, and more preferably an electrolytic capacitor using a metal such as aluminum as a substrate.

The through-hole conductors <NUM>, <NUM>, and <NUM> are formed so as to penetrate the capacitor portion <NUM> in the thickness direction of the capacitor layer <NUM>. In the present embodiment, the through-hole conductors <NUM>, <NUM>, and <NUM> are respectively formed in at least inner wall surfaces of the through-holes <NUM>, <NUM>, and <NUM> penetrating from the top surface to the bottom surface in the thickness direction of the package board <NUM>. The inner wall surfaces of these through-holes are metallized with a low-resistance metal such as Cu, Au, or Ag. For ease of processing, metallization can be performed by, for example, electroless Cu plating or electrolytic Cu plating. Note that the metallization of the through-hole conductor is not limited to the case where only the inner wall surface of the through-hole is metallized, but metal or a composite material of metal and resin may be loaded.

Here, the through-hole conductors are classified into A. that for an anode of a capacitor, B. that for a cathode and a ground of a capacitor, and C. that for an I/O line. that for an anode of a capacitor is connected to the anode of the capacitor portion <NUM>, B. that for a cathode and a ground of a capacitor is connected to the cathode of the capacitor portion <NUM>, and C. that for an I/O line is not connected to either the anode or the cathode of the capacitor portion <NUM>.

Among the through-hole conductors, A. that for an anode of a capacitor may or may not be filled with an insulating material between the through-hole penetrating the capacitor portion <NUM> and the through-hole conductor. The latter case is a structure in which the core portion <NUM> of the anode plate <NUM>, which is the anode of the capacitor portion <NUM>, is directly connected to the through-hole conductor. that for a cathode and a ground of a capacitor and C. that for an I/O line are filled with an insulating material between the through-hole penetrating the capacitor portion <NUM> and the through-hole conductor.

For example, A. that for an anode of a capacitor corresponds to the through-hole conductor <NUM>, B. that for a cathode and a ground of a capacitor corresponds to the through-hole conductor <NUM>, and C. that for an I/O line corresponds to the through-hole conductor <NUM>. In addition, C. that for an I/O line also correspond, for example, to through-hole conductors <NUM> and <NUM> described below.

<FIG> is a sectional view schematically illustrating a first modification of the semiconductor composite device <NUM> illustrated in <FIG>. <FIG> illustrates a state in which a semiconductor composite device 10B is mounted on a mother board <NUM>.

A package board 200B included in the semiconductor composite device 10B illustrated in <FIG> is provided with the through-hole conductor <NUM> connected to a terminal of a signal ground line of a load <NUM> when the load <NUM> is mounted on the board. The through-hole conductor <NUM> penetrates to a terminal layer <NUM> on the bottom surface in a state of not being electrically connected to a capacitor portion <NUM> included in a capacitor layer <NUM> and a coil portion <NUM> included in an inductor layer <NUM>. Then, it is electrically connected to a terminal <NUM> connected to the ground line of the mother board <NUM> with a solder bump <NUM> interposed between the through-hole conductor <NUM> and the terminal <NUM>.

Note that although the through-hole conductor of the ground line of the load <NUM> has been described in <FIG>, the ground lines of other mounting equipment may have the same configuration.

<FIG> is a sectional view schematically illustrating a second modification of the semiconductor composite device <NUM> illustrated in <FIG>. <FIG> illustrates a state in which a semiconductor composite device 10C is mounted on a mother board <NUM>.

A package board 200C included in the semiconductor composite device 10C illustrated in <FIG> is provided with the through-hole conductor <NUM> to a terminal of a signal line of a load <NUM> or a voltage regulator <NUM> disposed on the mounting surface. Similarly to the through-hole conductor <NUM> for a signal ground line illustrated in <FIG>, the through-hole conductor <NUM> penetrates to a terminal layer <NUM> on the bottom surface in a state of not being electrically connected to a capacitor portion <NUM> included in a capacitor layer <NUM> and a coil portion <NUM> included in an inductor layer <NUM>. Then, the through-hole conductor <NUM> is electrically connected to a signal line for connection to an I/O terminal of equipment (not illustrated) formed on the mounting surface of a mother board <NUM> with a solder bump <NUM> and a terminal <NUM> interposed between the through-hole conductor <NUM> and the signal line.

Note that, although <FIG> illustrates the through-hole conductor <NUM> for a ground line described in <FIG> in addition to the through-hole conductor <NUM> for a signal line, it may be configured such that the through-hole conductor <NUM> is absent and only the through-hole conductor <NUM> for a signal line is provided.

As an example, the thickness of each of the core portion <NUM> and the porous portion <NUM> of the anode plate <NUM> is approximately <NUM>, the thickness of each of the conductive portions <NUM> and <NUM> is approximately <NUM>, and the thickness of the whole capacitor layer <NUM> is approximately <NUM>.

As illustrated in <FIG>, the inductor layer <NUM> includes the coil portion <NUM> forming the inductor L1 and an insulating portion <NUM> obtained by molding the periphery of the coil portion <NUM> with a resin.

The coil portion <NUM> is a metal wiring formed by patterning a Cu core material (Cu foil) formed to have a thickness of about <NUM> by electroforming or rolling into a coil shape with a photoresist or the like and then performing etching. One end of the coil portion <NUM> is electrically connected to the through-hole conductor <NUM>, and the other end is electrically connected to the through-hole conductor <NUM>.

The insulating portion <NUM> includes an insulating material such as a resin such as epoxy, phenol, or polyimide, or a mixed material of a resin such as epoxy, phenol, or polyimide and an inorganic magnetic filler such as ferrite or silicon steel. In the case of a circuit for supplying direct-current power to the load <NUM>, it is preferable to use a filler of a metal-based magnetic material such as silicon steel having excellent direct-current superimposition characteristics.

For the inorganic magnetic filler, fillers having different average particle diameters may be dispersively disposed in order to improve magnetic characteristics, or may be disposed so as to have a gradient in dispersion concentration in order to prevent magnetic saturation. In addition, a flat or scaly filler may be used to impart directionality to the magnetic characteristics. When a metal-based material such as silicon steel is used as the inorganic magnetic filler, a surface insulating film may be formed around the filler using an inorganic insulating film, an organic insulating film, or the like in order to enhance insulation properties.

Note that inorganic fillers and organic fillers other than the magnetic material may be mixed for the purpose of, for example, reducing a difference in linear expansion coefficient with respect to the coil portion <NUM> and improving heat dissipation or insulation properties.

The inductance can be adjusted by adjusting the thickness of the insulating portion <NUM>. As an example, the insulating portions <NUM> above and below the coil portion <NUM> of <NUM> are each <NUM>, and the whole thickness of the inductor layer <NUM> is approximately <NUM>.

The terminal layer <NUM> for mounting the semiconductor composite device <NUM> on a mother board (not illustrated) is formed on the surface of the resin layer <NUM> provided on the bottom surface of the inductor layer <NUM>. The terminal layer <NUM> includes the input terminal IN, the output terminal OUT, and the ground terminal GND described above. In addition, similarly to the circuit layer <NUM> formed on the capacitor layer <NUM>, the terminal layer <NUM> may include wiring constituting a circuit in addition to a terminal, and may further include a plurality of layers.

The package board <NUM> is generally required to have a thickness of <NUM> or less from the viewpoint of thinning the system and heat dissipation properties of the load <NUM>. As an example, an upper circuit layer including the resin layer <NUM> and the circuit layer <NUM> is <NUM>, the capacitor layer <NUM> is <NUM>, the resin layer <NUM> is <NUM>, the inductor layer <NUM> is <NUM>, a bottom terminal layer including the resin layer <NUM> and the terminal layer <NUM> is <NUM>, and the thickness of the whole semiconductor composite device <NUM> is about <NUM>.

Hereinafter, a manufacturing process of the semiconductor composite device <NUM> illustrated in <FIG> will be described.

<FIG> is a flowchart for describing an outline of a manufacturing process of the semiconductor composite device <NUM> illustrated in <FIG>.

As illustrated in <FIG>, the capacitor layer <NUM> and the inductor layer <NUM> are individually formed in Steps S100 and S110, respectively. Thereafter, in Step S120, the formed capacitor layer <NUM> and inductor layer <NUM> are bonded and integrated using the resin layers <NUM>, <NUM>, and <NUM>. Next, in Step S130, the through-hole conductor is formed in the integrated capacitor layer <NUM> and inductor layer <NUM>. Thereafter, in Step S140, an electrode pattern and a wiring pattern are formed on the mounting surface, and in Step S150, equipment such as the voltage regulator <NUM> is mounted on the completed package board <NUM>.

<FIG> are diagrams for describing a formation process of the capacitor layer <NUM> in Step S100.

As illustrated in <FIG>, first, both surfaces of the aluminum foil to be the anode plate <NUM> are processed into a porous shape to form the porous portions <NUM> on the surfaces of the core portion <NUM>. Dielectric layers (not illustrated) are formed by applying an oxide film to the surfaces of the porous portions <NUM>. Thereafter, the cathode layers <NUM> are formed on the surfaces of the dielectric layers.

At this time, as in the capacitor layer <NUM> in <FIG>, a part of the porous portion <NUM> may be cut out until the core portion <NUM> is exposed by, for example, a dicing process or the like, and a Cu paste may be baked on the exposed core portion <NUM>. Thus, the capacitor portion <NUM> is formed.

Thereafter, a through-hole is formed in a portion where the through-hole conductor is formed by drilling, laser processing, or the like.

Next, as illustrated in <FIG>, a resin such as epoxy, polyimide, or phenol, or a mixed material of a resin such as epoxy, polyimide, or phenol and an inorganic filler such as silica or alumina is laminated on the capacitor portion <NUM>, and further thermally cured to seal the capacitor portion <NUM>, thereby forming the insulating portion <NUM>. After the sealing processing, conductive layers <NUM> for forming the conductive portions <NUM> and <NUM> for connecting the through-hole conductor and the respective electrodes of the capacitor portion <NUM> are formed on the surfaces of the insulating portion <NUM> by plating wiring processing or the like. Note that the through-hole may be formed after the sealing processing.

Thereafter, as illustrated in <FIG>, the conductive layers <NUM> are processed by etching or the like to form the conductive portions <NUM> and <NUM>. Then, holes reaching the core portion <NUM> of the anode plate <NUM> and the cathode layers <NUM> are opened in the conductive portions <NUM> and <NUM> by laser processing or the like, and are filled with a conductor such as Cu, thereby electrically connecting the core portion <NUM> of the anode plate <NUM> and the conductive portion <NUM> and electrically connecting the cathode layers <NUM> and the conductive portion <NUM>. Thus, the capacitor layer <NUM> is formed. Note that the core portion <NUM> of the anode plate <NUM> may be directly connected to the through-hole conductor <NUM> on the end surface of the anode plate <NUM>. In this case, it is not necessary to form the conductive portion <NUM>.

<FIG> are diagrams for describing a formation process of the inductor layer <NUM> in Step S110.

As illustrated in <FIG>, first, patterning is performed on both surfaces of a copper foil <NUM># to be a core with a photoresist or the like, and a photoresist cavity is etched. Thus, as illustrated in <FIG>, the coil portion <NUM> is formed.

Thereafter, an epoxy composite sheet in which a metal magnetic filler such as ferrite or silicon steel is dispersed is laminated on the surface of the coil portion <NUM> using a vacuum laminator or the like, and flattening and thermosetting treatment of the epoxy layer are performed using a hot press machine. Thus, as illustrated in <FIG>, the insulating portion <NUM> is formed.

Then, as illustrated in <FIG>, a through-hole is formed in a portion where the through-hole conductor is formed by drilling, laser processing, or the like, and the through-hole is filled with an insulating resin <NUM>. Thus, the inductor layer <NUM> is formed.

<FIG> are diagrams for describing a bonding process between the capacitor layer <NUM> and the inductor layer <NUM> in Step S120.

As illustrated in <FIG>, the resin layers <NUM>, <NUM>, and <NUM> obtained such that a resin such as epoxy, polyimide, or phenol, or a mixed material including a resin such as epoxy, polyimide, or phenol and an inorganic filler is formed into a film shape are disposed on the upper and lower surfaces and the intermediate surfaces of the capacitor layer <NUM> and the inductor layer <NUM> formed in Steps S100 and S110. Thereafter, as illustrated in <FIG>, the stacked layers are integrated by bonding and curing using a vacuum press or the like.

<FIG> are diagrams for describing a formation process of the through-hole conductor in Step S130.

As illustrated in <FIG>, after the layers are integrated, a through-hole is formed in a portion where the through-hole conductor is formed by drilling or laser processing. Then, as illustrated in <FIG>, the surface inside the through-hole is metallized by electroless Cu plating or the like to form the through-hole conductor, and the surfaces of the resin layers <NUM> and <NUM> are metallized to form metal layers <NUM>.

At this time, electrolytic Cu plating treatment may be further performed to increase the thickness of the metal layers <NUM> on the surfaces of the resin layers or fill the through-hole in which the through-hole conductor is formed with Cu.

<FIG> is a diagram for describing a formation process of an electrode pattern and a wiring pattern in Step S140.

As illustrated in <FIG>, wiring, lands, and terminals for forming the circuit layer <NUM> and the terminal layer <NUM> are formed on the surfaces of the resin layers by patterning the metal layers <NUM> on the surfaces of the resin layers using a photoresist and removing unnecessary Cu by etching. At this time, in order to facilitate mounting of the equipment, it is preferable that surface treatment such as Ni/Au plating, Ni/Pb/Au plating, or preflux treatment is performed to metal surfaces such as of the lands and the terminals. In addition, a solder resist layer may be formed on the outermost layer portion in order to prevent solder flow at the time of surface mounting of the equipment. Thus, the package board <NUM> is formed.

<FIG> is a diagram for describing an equipment mounting process in Step S150.

As illustrated in <FIG>, in the package board <NUM> formed as described above, the voltage regulator <NUM> (see <FIG>), the load <NUM>, and the pieces of other electronic equipment <NUM> are mounted on the circuit layer <NUM> on the surface of the capacitor layer <NUM>, and the semiconductor composite device <NUM> illustrated in <FIG> is formed.

Note that, the semiconductor composite device <NUM> is configured such that the capacitor layer <NUM> is disposed above the inductor layer <NUM> in the package board <NUM>, but the order of the inductor layer <NUM> and the capacitor layer <NUM> may be reversed as long as electrical connection is maintained. In addition, the package board may be configured to include therein two or more capacitor layers <NUM> or may be configured to include two or more inductor layers <NUM>. Alternatively, in the package board, a plurality of capacitor layers may be configured to be disposed in plane or a plurality of inductor layers may be configured to be disposed in plane. Further, like the package board 200A, the inductor layer <NUM> may be configured not to be disposed in the package board.

In addition, in the description, an example of application to a chopper-type step-down switching regulator has been described, but it can also be applied to a semiconductor composite device in which a power transmission line including other step-up/down circuits is systematized.

Hereinafter, a package board, which is one embodiment of the module of the present invention, will be described for each embodiment.

A package board according to one embodiment of the module of the present invention includes, for example, a capacitor layer in which a capacitor is formed, a connection terminal used for electrical connection with at least one of a voltage regulator and a load, and a through-hole conductor formed to penetrate the capacitor layer in a thickness direction of the capacitor layer, and the capacitor is electrically connected to at least one of the load and the voltage regulator with the through-hole conductor interposed between the load and the voltage regulator. The package board may or may not include an inductor layer in which an inductor is formed.

Each embodiment described below is an example, and it goes without saying that the configurations illustrated in the different embodiments can be replaced or combined in part. In the second and subsequent embodiments, description of matters common to the first embodiment will be omitted, and only different points will be described. In particular, the same operation and effect of the same configuration will not be sequentially described for each embodiment.

In a package board according to the first embodiment of the present invention, a through-hole conductor includes a first through-hole conductor formed in at least an inner wall surface of a first through-hole penetrating a capacitor portion in a thickness direction, and the first through-hole conductor is electrically connected to an anode of the capacitor portion. In the first embodiment of the present invention, by electrically connecting the first through-hole conductor to the anode of the capacitor portion, the package board can be downsized, and a semiconductor composite device can be further downsized.

Further, in the package board according to the first embodiment of the present invention, the capacitor portion includes an anode plate including metal, and the first through-hole conductor is connected to an end surface of the anode plate. Thus, it is possible to simultaneously realize the wiring function of connecting the upper and lower sides of the capacitor layer and the function of connecting the anode of the capacitor portion and the wiring through the first through-hole conductor, and thus, it is possible to downsize the semiconductor composite device. Further, as the wiring length is shortened, the ESR of the capacitor can be reduced, and loss due to wiring can be reduced.

<FIG> is a sectional view schematically illustrating a first through-hole conductor and a periphery thereof in an example of a package board according to the first embodiment of the present invention. <FIG> is a projected sectional view taken along line XVIII-XVIII in <FIG>.

A package board 200D illustrated in <FIG> includes a capacitor layer <NUM> and a first through-hole conductor 262A. The capacitor layer <NUM> includes a capacitor portion <NUM>, conductive portions <NUM> electrically connected to the first through-hole conductor 262A, and insulating portions <NUM> stacked on the surfaces of the capacitor portion <NUM>. The conductive portions <NUM> are formed on the surfaces of the first through-hole conductor 262A and can function as a connection terminal. As illustrated in <FIG>, the insulating portion <NUM> preferably includes a first insulating portion 225A stacked on the surface of the capacitor portion <NUM> and a second insulating portion 225B stacked on the surface of the first insulating portion 225A.

In the present embodiment, the capacitor portion <NUM> includes an anode plate <NUM> including metal. The anode plate <NUM> has a core portion <NUM> including a valve-acting metal. The anode plate <NUM> preferably has a porous portion <NUM> provided on at least one main surface of the core portion <NUM>. A dielectric layer (not illustrated) is provided on the surface of the porous portion <NUM>, and a cathode layer <NUM> is provided on the surface of the dielectric layer. Thus, in the present embodiment, the capacitor portion <NUM> forms an electrolytic capacitor. Note that, <FIG> illustrates a carbon layer 236A and a copper layer 236B, which are conductor layers, as the cathode layer <NUM>. Although not illustrated in <FIG>, as the cathode layer <NUM>, a solid electrolyte layer is provided on the surface of the dielectric layer, and a conductor layer is provided on the surface of the solid electrolyte layer.

The first through-hole conductor 262A is formed so as to penetrate the capacitor portion <NUM> in the thickness direction of the capacitor layer <NUM>. Specifically, the first through-hole conductor 262A is formed in at least an inner wall surface of a first through-hole 263A penetrating the capacitor portion <NUM> in the thickness direction.

As illustrated in <FIG> and <FIG>, the first through-hole conductor 262A is connected to an end surface of the anode plate <NUM>. That is, the first through-hole conductor 262A is connected to the core portion <NUM>, which is the anode of the capacitor portion <NUM>, on the end surface of the anode plate <NUM>.

The core portion <NUM> and the porous portions <NUM> are exposed on the end surface of the anode plate <NUM> connected to the first through-hole conductor 262A. By filling the porous portions <NUM> with an insulating material, a third insulating portion 225C is provided around the first through-hole conductor 262A as illustrated in <FIG> and <FIG>.

As illustrated in <FIG>, the core portion <NUM> and the porous portions <NUM> are preferably exposed on the end surface of the anode plate <NUM> connected to the first through-hole conductor 262A. In this case, since the contact area between the first through-hole conductor 262A and the porous portions <NUM> is increased, the adhesion is increased, and defects such as peeling of the first through-hole conductor 262A are less likely to occur.

When the core portion <NUM> and the porous portions <NUM> are exposed on the end surface of the anode plate <NUM> connected to the first through-hole conductor 262A, it is preferable that the insulating material is present in hollow portions of the porous portions <NUM>. That is, it is preferable that the third insulating portion 225C is provided around the first through-hole conductor 262A. By filling the porous portions <NUM> around the first through-hole conductor 262A to some extent with the insulating material, insulation properties between the core portion <NUM> of the anode plate <NUM> and the cathode layers <NUM> can be secured, and a short circuit can be prevented. Further, since it is possible to suppress the dissolution of the end surface of the anode plate <NUM> generated at the time of chemical solution treatment for forming the conductive portions <NUM> or the like, it is possible to prevent the chemical solution from entering the capacitor portion <NUM>, and the reliability of the capacitor is improved.

From the viewpoint of enhancing the above-described effect, the thickness of the third insulating portion 225C is preferably thicker than the thickness of the porous portion <NUM> as illustrated in <FIG>.

Note that when the core portion <NUM> and the porous portions <NUM> are exposed on the end surface of the anode plate <NUM> connected to the first through-hole conductor 262A, the insulating material may not be present in the hollow portions of the porous portions <NUM>. In this case, the hollow portions of the porous portions <NUM> are exposed on the end surface of the anode plate <NUM>.

As illustrated in <FIG> and <FIG>, it is preferable that an anode connection layer <NUM> is provided between the first through-hole conductor 262A and the anode plate <NUM>, and the first through-hole conductor 262A is connected to the end surface of the anode plate <NUM> with the anode connection layer <NUM> interposed between the first through-hole conductor 262A and the end surface of the anode plate <NUM>. Since the anode connection layer <NUM> is provided between the first through-hole conductor 262A and the anode plate <NUM>, the anode connection layer <NUM> functions as a barrier layer with respect to the core portion <NUM> and the porous portions <NUM> of the anode plate <NUM>. As a result, since it is possible to suppress the dissolution of the anode plate <NUM> generated at the time of chemical solution treatment for forming the conductive portions <NUM> or the like, it is possible to prevent the chemical solution from entering the capacitor portion <NUM>, and the reliability of the capacitor is improved.

When the anode connection layer <NUM> is provided between the first through-hole conductor 262A and the anode plate <NUM>, the anode connection layer <NUM> includes, for example, a first anode connection layer 268A containing Zn as a main material and a second anode connection layer 268B containing Ni or Cu as a main material in order from the anode plate <NUM> as illustrated in <FIG> and <FIG>. For example, Zn is displaced and deposited by zincate treatment to form the first anode connection layer 268A on the end surface of the anode plate <NUM>, and then the second anode connection layer 268B is formed on the first anode connection layer 268A by electroless Ni plating treatment or electroless Cu plating treatment. Note that the first anode connection layer 268A may disappear, and in this case, the anode connection layer <NUM> may include only the second anode connection layer 268B.

In particular, the anode connection layer <NUM> preferably includes a layer containing Ni as a main material. By using Ni for the anode connection layer <NUM>, damage to Al or the like constituting the anode plate <NUM> can be reduced, and the barrier properties can be improved.

In a case where the anode connection layer <NUM> is provided between the first through-hole conductor 262A and the anode plate <NUM>, when viewed in section from a direction orthogonal to the thickness direction as illustrated in <FIG>, the length of the anode connection layer <NUM> in the direction in which the first through-hole conductor 262A extends is preferably longer than the length of the anode plate <NUM> in the direction in which the first through-hole conductor 262A extends. In this case, the core portion <NUM> and the porous portions <NUM> exposed on the end surface of the anode plate <NUM> are fully covered with the anode connection layer <NUM>, so that the above-described dissolution of the anode plate <NUM> can be further suppressed.

When viewed in section from a direction orthogonal to the thickness direction, for example, the length of the anode connection layer <NUM> in the direction in which the first through-hole conductor 262A extends is preferably <NUM>% or more and <NUM>% or less of the length of the anode plate <NUM> in the direction in which the first through-hole conductor 262A extends. The length of the anode connection layer <NUM> in the direction in which the first through-hole conductor 262A extends may be the same as the length of the anode plate <NUM> in the direction in which the first through-hole conductor 262A extends, or may be shorter than the length of the anode plate <NUM> in the direction in which the first through-hole conductor 262A extends.

As illustrated in <FIG>, when viewed in plan from the thickness direction, the first through-hole conductor 262A is preferably connected to the end surface of the anode plate <NUM> over the whole circumference of the first through-hole 263A. In this case, since the contact area between the first through-hole conductor 262A and the anode plate <NUM> increases, the connection resistance with the first through-hole conductor 262A is reduced, and the ESR of the capacitor can be reduced. Further, the adhesion between the first through-hole conductor 262A and the anode plate <NUM> is increased, and defects such as peeling at the connection surface due to thermal stress are less likely to occur.

The first through-hole 263A is preferably filled with a material containing a resin. That is, as illustrated in <FIG> and <FIG>, it is preferable that a first resin-filled portion 229A is provided in the first through-hole 263A. By filling the first through-hole 263A with a resin material to eliminate a gap, occurrence of delamination of the first through-hole conductor 262A formed in the inner wall surface of the first through-hole 263A can be suppressed.

The material filled into the first through-hole 263A preferably has a thermal expansion coefficient larger than that of the material (for example, copper) constituting the first through-hole conductor 262A. In this case, the material filled into the first through-hole 263A expands in a high-temperature environment, so that the first through-hole conductor 262A is pressed from an inner side to an outer side of the first through-hole 263A, and the occurrence of delamination of the first through-hole conductor 262A can be further suppressed.

The thermal expansion coefficient of the material filled into the first through-hole 263A may be the same as the thermal expansion coefficient of the material constituting the first through-hole conductor 262A, or may be smaller than the thermal expansion coefficient of the material constituting the first through-hole conductor 262A.

In the package board according to the first embodiment of the present invention, the through-hole conductor further includes a second through-hole conductor formed in at least an inner wall surface of a second through-hole penetrating the capacitor portion, in which the first through-hole conductor is formed, in the thickness direction, and the second through-hole conductor is preferably electrically connected to a cathode of the capacitor portion. In this case, by electrically connecting the second through-hole conductor to the cathode of the capacitor portion, the package board can be downsized, and the semiconductor composite device can be further downsized.

<FIG> is a sectional view schematically illustrating a second through-hole conductor and a periphery thereof in the package board illustrated in <FIG>. <FIG> is a projected sectional view taken along line XX-XX in <FIG>.

A package board 200D illustrated in <FIG> includes a capacitor layer <NUM> and a second through-hole conductor 264A. The capacitor layer <NUM> includes a capacitor portion <NUM>, conductive portions <NUM> electrically connected to the second through-hole conductor 264A, and insulating portions <NUM> stacked on the surfaces of the capacitor portion <NUM>. The conductive portions <NUM> are formed on the surfaces of the second through-hole conductor 264A and can function as a connection terminal. As illustrated in <FIG>, the insulating portion <NUM> preferably includes a first insulating portion 225A stacked on the surface of the capacitor portion <NUM> and a second insulating portion 225B stacked on the surface of the first insulating portion 225A.

As described with reference to <FIG>, the capacitor portion <NUM> includes an anode plate <NUM> including metal. For example, the anode plate <NUM> has a core portion <NUM> including a valve-acting metal. The anode plate <NUM> preferably has a porous portion <NUM> provided on at least one main surface of the core portion <NUM>. A dielectric layer (not illustrated) is provided on the surface of the porous portion <NUM>, and a cathode layer <NUM> is provided on the surface of the dielectric layer. Thus, in the present embodiment, the capacitor portion <NUM> forms an electrolytic capacitor.

The second through-hole conductor 264A is formed so as to penetrate the capacitor portion <NUM> in the thickness direction of the capacitor layer <NUM>. Specifically, the second through-hole conductor 264A is formed in at least an inner wall surface of a second through-hole 265A penetrating the capacitor portion <NUM> in the thickness direction.

As illustrated in <FIG>, the second through-hole conductor 264A is electrically connected to the cathode layers <NUM> with the conductive portions <NUM> and the via conductors <NUM> interposed between the second through-hole conductor 264A and the cathode layers <NUM>.

When the insulating portion <NUM> includes the first insulating portion 225A and the second insulating portion 225B, as illustrated in <FIG> and <FIG>, the second insulating portion 225B preferably extends between the second through-hole conductor 264A and the anode plate <NUM>. When the second insulating portion 225B is present between the second through-hole conductor 264A and the anode plate <NUM>, insulation properties between the second through-hole conductor 264A and the core portion <NUM> of the anode plate <NUM> can be secured.

The core portion <NUM> and the porous portions <NUM> are exposed on the end surface of the anode plate <NUM> contacting the second insulating portion 225B. By filling the porous portions <NUM> with an insulating material, a fourth insulating portion 225D is provided around the second through-hole conductor 264A as illustrated in <FIG> and <FIG>.

When the second insulating portion 225B extends between the second through-hole conductor 264A and the anode plate <NUM>, as illustrated in <FIG>, the core portion <NUM> and the porous portion <NUM> are preferably exposed on the end surface of the anode plate <NUM> contacting the second insulating portion 225B. In this case, since the contact area between the second insulating portion 225B and the porous portions <NUM> is increased, the adhesion is increased, and defects such as peeling are less likely to occur.

When the core portion <NUM> and the porous portions <NUM> are exposed on the end surface of the anode plate <NUM> contacting the second insulating portion 225B, it is preferable that the insulating material is present in hollow portions of the porous portions <NUM>. That is, as illustrated in <FIG> and <FIG>, it is preferable that the fourth insulating portion 225D is provided around the second through-hole conductor 264A. By filling the porous portions <NUM> around the second through-hole conductor 264A to some extent with the insulating material, insulation properties between the second through-hole conductor 264A and the core portion <NUM> of the anode plate <NUM> can be secured, and a short circuit can be prevented.

From the viewpoint of enhancing the above-described effect, the thickness of the fourth insulating portion 225D is preferably thicker than the thickness of the porous portion <NUM> as illustrated in <FIG>.

Note that when the core portion <NUM> and the porous portions <NUM> are exposed on the end surface of the anode plate <NUM> contacting the second insulating portion 225B, the insulating material may not be present in the hollow portions of the porous portions <NUM>. In this case, the hollow portions of the porous portions <NUM> are exposed on the end surface of the anode plate <NUM>.

When the second insulating portion 225B extends between the second through-hole conductor 264A and the anode plate <NUM>, the insulating material constituting the second insulating portion 225B preferably enters the hollow portions of the porous portions <NUM>. Thus, the mechanical strength of the porous portions <NUM> can be increased. In addition, it is possible to suppress the occurrence of delamination caused by pores of the porous portions <NUM>.

The insulating material constituting the second insulating portion 225B preferably has a thermal expansion coefficient larger than that of the material (for example, copper) constituting the second through-hole conductor 264A. In this case, when the insulating material constituting the second insulating portion 225B expands in a high-temperature environment, the porous portions <NUM> and the second through-hole conductor 264A are pressed, and the occurrence of delamination can be further suppressed.

The thermal expansion coefficient of the insulating material constituting the second insulating portion 225B may be the same as the thermal expansion coefficient of the material constituting the second through-hole conductor 264A, or may be smaller than the thermal expansion coefficient of the material constituting the first through-hole conductor 264A.

The second through-hole 265A is preferably filled with a material containing a resin. That is, as illustrated in <FIG> and <FIG>, it is preferable that a second resin-filled portion 229B is provided in the second through-hole 265A. By filling the second through-hole 265A with a resin material to eliminate a gap, occurrence of delamination of the second through-hole conductor 264A formed in the inner wall surface of the second through-hole 265A can be suppressed.

The material filled into the second through-hole 265A preferably has a thermal expansion coefficient larger than that of the material (for example, copper) constituting the second through-hole conductor 264A. In this case, the material filled into the second through-hole 265A expands in a high-temperature environment, so that the second through-hole conductor 264A is pressed from an inner side to an outer side of the second through-hole 265A, and the occurrence of delamination of the second through-hole conductor 264A can be further suppressed.

The thermal expansion coefficient of the material filled into the second through-hole 265A may be the same as the thermal expansion coefficient of the material constituting the second through-hole conductor 264A, or may be smaller than the thermal expansion coefficient of the material constituting the second through-hole conductor 264A.

In the package board according to the first embodiment of the present invention, the through-hole conductor may include a third through-hole conductor that is not connected to either the anode or the cathode of the capacitor portion. In addition to the first through-hole conductor and the second through-hole conductor, a line connected to the ground and the like are connected to the upper and lower sides of the package board similarly via the through-hole conductor, so that the degree of freedom in designing the package board is improved, and the semiconductor composite device can be further downsized. Examples of the third through-hole conductor include the through-hole conductor <NUM> illustrated in <FIG>, the through-hole conductor <NUM> illustrated in <FIG>, and the through-hole conductor <NUM> illustrated in <FIG>.

As described above, the through-hole conductor are classified into A. that for an anode of a capacitor, B. that for a cathode and a ground of a capacitor, and C. that for an I/O line. that for an anode of a capacitor corresponds to the first through-hole conductor, B. that for a cathode and a ground of a capacitor corresponds to the second through-hole conductor, and C. that for an I/O line corresponds to the third through-hole conductor.

In the package board according to the first embodiment of the present invention, the capacitor layer may include a plurality of capacitor portions disposed in plane. Also in a case where a plurality of capacitor portions is disposed in plane, the same effect as the effect described above can be obtained with respect to wiring connected to each of the capacitor portions.

<FIG> is a plan view schematically illustrating an example of a capacitor layer on which a plurality of capacitor portions is disposed in plane.

A capacitor layer 210A illustrated in <FIG> includes a plurality of capacitor portions <NUM> disposed in plane. In each capacitor portion <NUM>, an anode X has the structure illustrated in <FIG> and <FIG>, and a cathode Y has the structure illustrated in <FIG> and <FIG>. That is, in the anode X of the capacitor portion <NUM>, the first through-hole conductor 262A is connected to the core portion <NUM>, which is the anode of the capacitor portion <NUM>, on the end surface of the anode plate <NUM>, and the second through-hole conductor 264A is electrically connected to the cathode layers <NUM> with the conductive portions <NUM> and the via conductors <NUM> interposed between the second through-hole conductor 264A and the cathode layers <NUM>.

In the package board according to the first embodiment of the present invention, the capacitor layer preferably includes a plurality of capacitor portions in which one capacitor sheet is divided. In this case, since the degree of freedom with respect to the disposition of the capacitor portion is increased, a higher effect can be obtained in downsizing of the semiconductor composite device.

In the second embodiment of the present invention, the shape of a first through-hole conductor is different between a portion located at a core portion and a portion located at a porous portion of an anode plate.

<FIG> is a sectional view schematically illustrating a first through-hole conductor and a periphery thereof in an example of a package board according to the second embodiment of the present invention.

In a package board 200E illustrated in <FIG>, a first through-hole conductor 262A is connected to the end surface of an anode plate <NUM>, and a core portion <NUM> and porous portions <NUM> are exposed on the end surface of the anode plate <NUM> connected to the first through-hole conductor 262A. Further, the outer peripheral length of the first through-hole conductor 262A located at the porous portions <NUM> is longer than the outer peripheral length of the first through-hole conductor 262A located at the core portion <NUM>.

When the outer peripheral length of the first through-hole conductor 262A located at the porous portions <NUM> is longer than the outer peripheral length of the first through-hole conductor 262A located at the core portion <NUM>, the contact area between the first through-hole conductor 262A and the porous portions <NUM> increases, so that adhesion is increased, and peeling or the like of the first through-hole conductor 262A due to thermal stress can be suppressed. Further, the connection resistance with the first through-hole conductor 262A is reduced, and the ESR of the capacitor can be reduced.

Note that the shape is not limited to that illustrated in <FIG>, and it is sufficient if a portion in which the outer peripheral length of the first through-hole conductor 262A located at the porous portions <NUM> is longer than the outer peripheral length of the first through-hole conductor 262A located at the core portion <NUM> is present in at least a part of the first through-hole conductor 262A located at the porous portions <NUM>. In addition, the outer peripheral length of the first through-hole conductor 262A located at the core portion <NUM> may be constant or may not be constant in the thickness direction. Similarly, the outer peripheral length of the first through-hole conductor 262A located at the porous portions <NUM> may be constant or may not be constant in the thickness direction.

The maximum outer peripheral length of the first through-hole conductor 262A located at the porous portions <NUM> is preferably, for example, <NUM>% or more and <NUM>% or less of the maximum outer peripheral length of the first through-hole conductor 262A located at the core portion <NUM>.

In the third embodiment of the present invention, the shape of a first through-hole conductor is different between a portion where an anode connection layer is present and a portion where an anode connection layer is not present.

<FIG> is a sectional view schematically illustrating a first through-hole conductor and a periphery thereof in an example of a package board according to the third embodiment of the present invention.

In a package board 200F illustrated in <FIG>, an anode connection layer <NUM> is provided between a first through-hole conductor 262A and an anode plate <NUM>, and the first through-hole conductor 262A is connected to the end surface of the anode plate <NUM> with the anode connection layer <NUM> interposed between the first through-hole conductor 262A and the end surface of the anode plate <NUM>. As illustrated in <FIG>, when viewed in section from the direction orthogonal to the thickness direction, the first through-hole conductor 262A of the portion where the anode connection layer <NUM> is present protrudes inward in a first through-hole 263A as compared with the first through-hole conductor 262A of the portion where the anode connection layer <NUM> is not present.

Since the first through-hole conductor 262A protrudes inward in the first through-hole 263A in the portion where the anode connection layer <NUM> is present, the connection resistance between the first through-hole conductor 262A and the anode plate <NUM> is reduced, and the ESR of the capacitor can be reduced. Further, the adhesion between the first through-hole conductor 262A and the anode connection layer <NUM> is increased, and peeling or the like of the first through-hole conductor 262A due to thermal stress can be suppressed.

Note that the shape is not limited to that illustrated in <FIG>, and the whole first through-hole conductor 262A of the portion where the anode connection layer <NUM> is present may protrude inward in the first through-hole 263A, or a part of the first through-hole conductor 262A of the portion where the anode connection layer <NUM> is present may protrude inward in the first through-hole 263A. In addition, the amount for which the first through-hole conductor 262A protrudes inward in the first through-hole 263A in the portion where the anode connection layer <NUM> is present may or may not be constant in the thickness direction.

In the fourth embodiment of the present invention, the shape of a first through-hole in which a first through-hole conductor is formed is different between a portion formed in an insulating portion and a portion formed in a capacitor portion.

<FIG> is a sectional view schematically illustrating a first through-hole conductor and a periphery thereof in an example of a package board according to the fourth embodiment of the present invention.

A package board <NUM> illustrated in <FIG> includes a capacitor layer <NUM> and a first through-hole conductor 262A. The capacitor layer <NUM> includes a capacitor portion <NUM>, conductive portions <NUM>, and insulating portions <NUM>. The insulating portion <NUM> includes a first insulating portion 225A and a second insulating portion 225B.

In the package board <NUM> illustrated in <FIG>, an angle (angle indicated by θ<NUM> in <FIG>) formed by an inner wall surface of a first through-hole 263A formed in the second insulating portion 225B and an extended surface of the main surface of an anode plate <NUM> is <NUM>° or more, and is larger than an angle (angle indicated by θ<NUM> in <FIG>) formed by an inner wall surface of the first through-hole 263A formed in a core portion <NUM> of the anode plate <NUM> and the extended surface of the main surface of the anode plate <NUM>.

Thus, a mechanical stress concentrated on the end of the first through-hole conductor 262A in the first through-hole 263A is dispersed, so that it is possible to suppress the generation of cracking that may occur in the first through-hole conductor 262A or the like in the first through-hole 263A. Further, since a plating chemical solution used for forming the first through-hole conductor 262A or the like easily enters the first through-hole 263A, it is possible to suppress the generation of plating defects due to insufficient contact between the plating chemical solution and the first through-hole 263A. In addition, in a case where a first resin-filled portion 229A is provided in the first through-hole 263A, a filling material used for forming the first resin-filled portion 229A easily enters the first through-hole 263A, so that generation of voids in the first resin-filled portion 229A can be suppressed.

From the viewpoint of enhancing the above-described effect, it is preferable that an angle (angle indicated by θ<NUM> in <FIG>) formed by the inner wall surface of the first through-hole 263A formed in the first insulating portion 225A and the extended surface of the main surface of the anode plate <NUM> is <NUM>° or more, and is larger than the angle θ<NUM> formed by the inner wall surface of the first through-hole 263A formed in the core portion <NUM> of the anode plate <NUM> and the extended surface of the main surface of the anode plate <NUM>, and the angle θ<NUM> formed by the inner wall surface of the first through-hole 263A formed in the second insulating portion 225B and the extended surface of the main surface of the anode plate <NUM> is equal to or larger than the angle θ<NUM> formed by the inner wall surface of the first through-hole 263A formed in the first insulating portion 225A and the extended surface of the main surface of the anode plate <NUM>.

The angle θ<NUM> formed by the inner wall surface of the first through-hole 263A formed in the second insulating portion 225B and the extended surface of the main surface of the anode plate <NUM> is preferably, for example, <NUM>% or more and <NUM>% or less of the angle θ<NUM> formed by the inner wall surface of the first through-hole 263A formed in the core portion <NUM> of the anode plate <NUM> and the extended surface of the main surface of the anode plate <NUM>.

The angle θ<NUM> formed by the inner wall surface of the first through-hole 263A formed in the first insulating portion 225A and the extended surface of the main surface of the anode plate <NUM> is preferably, for example, <NUM>% or more and <NUM>% or less of the angle θ<NUM> formed by the inner wall surface of the first through-hole 263A formed in the core portion <NUM> of the anode plate <NUM> and the extended surface of the main surface of the anode plate <NUM>. The angle θ<NUM> formed by the inner wall surface of the first through-hole 263A formed in the first insulating portion 225A and the extended surface of the main surface of the anode plate <NUM> may be equal to the angle θ<NUM> formed by the inner wall surface of the first through-hole 263A formed in the core portion <NUM> of the anode plate <NUM> and the extended surface of the main surface of the anode plate <NUM>, and may be smaller than the angle θ<NUM> formed by the inner wall surface of the first through-hole 263A formed in the core portion <NUM> of the anode plate <NUM> and the extended surface of the main surface of the anode plate <NUM>.

The angle θ<NUM> formed by the inner wall surface of the first through-hole 263A formed in the second insulating portion 225B and the extended surface of the main surface of the anode plate <NUM> is preferably, for example, <NUM>% or more and <NUM>% or less of the angle θ<NUM> formed by the inner wall surface of the first through-hole 263A formed in the first insulating portion 225A and the extended surface of the main surface of the anode plate <NUM>. The angle θ<NUM> formed by the inner wall surface of the first through-hole 263A formed in the second insulating portion 225B and the extended surface of the main surface of the anode plate <NUM> may be smaller than the angle θ<NUM> formed by the inner wall surface of the first through-hole 263A formed in the first insulating portion 225A and the extended surface of the main surface of the anode plate <NUM>.

The angle θ<NUM> formed by the inner wall surface of the first through-hole 263A formed in the core portion <NUM> of the anode plate <NUM> and the extended surface of the main surface of the anode plate <NUM> is, for example, in a range of <NUM>° or more and <NUM>° or less.

The angle formed by the inner wall surface of the first through-hole 263A formed in a porous portion <NUM> of the anode plate <NUM> and an extended surface of the main surface of the anode plate <NUM> is preferably equal to or more than the angle θ<NUM> formed by the inner wall surface of the first through-hole 263A formed in the core portion <NUM> of the anode plate <NUM> and the extended surface of the main surface of the anode plate <NUM>, and smaller than the angle θ<NUM> formed by the inner wall surface of the first through-hole 263A formed in the first insulating portion 225A and the extended surface of the main surface of the anode plate <NUM>.

The angle θ<NUM> formed by the inner wall surface of the first through-hole 263A formed in the first insulating portion 225A and the extended surface of the main surface of the anode plate <NUM> is, for example, in a range of <NUM>° or more and <NUM>° or less.

The angle θ<NUM> formed by the inner wall surface of the first through-hole 263A formed in the second insulating portion 225B and the extended surface of the main surface of the anode plate <NUM> is, for example, in a range of <NUM>° or more and <NUM>° or less.

In the fifth embodiment of the present invention, the shape of a second through-hole in which a second through-hole conductor is formed is different between a portion formed in an insulating portion and a portion formed in a capacitor portion.

<FIG> is a sectional view schematically illustrating a second through-hole conductor and a periphery thereof in an example of a package board according to the fifth embodiment of the present invention.

A package board <NUM> illustrated in <FIG> includes a capacitor layer <NUM> and a second through-hole conductor 264A. The capacitor layer <NUM> includes a capacitor portion <NUM>, conductive portions <NUM>, and insulating portions <NUM>. The insulating portion <NUM> includes a first insulating portion 225A and a second insulating portion 225B.

In the package board <NUM> illustrated in <FIG>, an angle (angle indicated by θ<NUM> in <FIG>) formed by an inner wall surface of a second through-hole 265A formed in the second insulating portion 225B and an extended surface of the main surface of an anode plate <NUM> is <NUM>° or more, and is larger than an angle (angle indicated by θ<NUM> in <FIG>) formed by the inner wall surface of the second through-hole 265A formed in the second insulating portion 225B contacting a core portion <NUM> of the anode plate <NUM> and the extended surface of the main surface of the anode plate <NUM>.

Thus, a mechanical stress concentrated on the end of the second through-hole conductor 264A in the second through-hole 265A is dispersed, so that it is possible to suppress the generation of cracking that may occur in the second through-hole conductor 264A or the like in the second through-hole 265A. Further, since a plating chemical solution used for forming the second through-hole conductor 264A easily enters the second through-hole 265A, it is possible to suppress the generation of plating defects due to insufficient contact between the plating chemical solution and the second through-hole 265A. In addition, in a case where a second resin-filled portion 229B is provided in the second through-hole 265A, a filling material used for forming the second resin-filled portion 229B easily enters the second through-hole 265A, so that generation of voids in the second resin-filled portion 229B can be suppressed.

From the viewpoint of enhancing the above-described effect, it is preferable that an angle (angle indicated by θ<NUM> in <FIG>) formed by the inner wall surface of the second through-hole 265A formed in the first insulating portion 225A and the extended surface of the main surface of the anode plate <NUM> is <NUM>° or more, and is larger than the angle θ<NUM> formed by the inner wall surface of the second through-hole 265A formed in the second insulating portion 225B contacting the core portion <NUM> of the anode plate <NUM> and the extended surface of the main surface of the anode plate <NUM>, and the angle θ<NUM> formed by the inner wall surface of the second through-hole 265A formed in the second insulating portion 225B and the extended surface of the main surface of the anode plate <NUM> is equal to or larger than the angle θ<NUM> formed by the inner wall surface of the second through-hole 265A formed in the first insulating portion 225A and the extended surface of the main surface of the anode plate <NUM>.

The angle θ<NUM> formed by the inner wall surface of the second through-hole 265A formed in the second insulating portion 225B and the extended surface of the main surface of the anode plate <NUM> is preferably, for example, <NUM>% or more and <NUM>% or less of the angle θ<NUM> formed by the inner wall surface of the second through-hole 265A formed in the second insulating portion 225B contacting the core portion <NUM> of the anode plate <NUM> and the extended surface of the main surface of the anode plate <NUM>.

The angle θ<NUM> formed by the inner wall surface of the second through-hole 265A formed in the first insulating portion 225A and the extended surface of the main surface of the anode plate <NUM> is preferably, for example, <NUM>% or more and <NUM>% or less of the angle θ<NUM> formed by the inner wall surface of the second through-hole 265A formed in the second insulating portion 225B contacting the core portion <NUM> of the anode plate <NUM> and the extended surface of the main surface of the anode plate <NUM>. The angle θ<NUM> formed by the inner wall surface of the second through-hole 265A formed in the first insulating portion 225A and the extended surface of the main surface of the anode plate <NUM> may be equal to the angle θ<NUM> formed by the inner wall surface of the second through-hole 265A formed in the second insulating portion 225B contacting the core portion <NUM> of the anode plate <NUM> and the extended surface of the main surface of the anode plate <NUM>, and may be smaller than the angle θ<NUM> formed by the inner wall surface of the second through-hole 265A formed in the second insulating portion 225B contacting the core portion <NUM> of the anode plate <NUM> and the extended surface of the main surface of the anode plate <NUM>.

The angle θ<NUM> formed by the inner wall surface of the second through-hole 265A formed in the second insulating portion 225B contacting the core portion <NUM> of the anode plate <NUM> and the extended surface of the main surface of the anode plate <NUM> is, for example, in a range of <NUM>° or more and <NUM>° or less.

The angle formed by the inner wall surface of the second through-hole 265A formed in the second insulating portion 225B contacting a porous portion <NUM> of the anode plate <NUM> and an extended surface of the main surface of the anode plate <NUM> is preferably equal to or more than the angle θ<NUM> formed by the inner wall surface of the second through-hole 265A formed in the second insulating portion 225B contacting the core portion <NUM> of the anode plate <NUM> and the extended surface of the main surface of the anode plate <NUM>, and smaller than the angle θ<NUM> formed by the inner wall surface of the second through-hole 265A formed in the first insulating portion 225A and the extended surface of the main surface of the anode plate <NUM>.

The angle θ<NUM> formed by the inner wall surface of the second through-hole 265A formed in the first insulating portion 225A and the extended surface of the main surface of the anode plate <NUM> is, for example, in a range of <NUM>° or more and <NUM>° or less.

The angle θ<NUM> formed by the inner wall surface of the second through-hole 265A formed in the second insulating portion 225B and the extended surface of the main surface of the anode plate <NUM> is, for example, in a range of <NUM>° or more and <NUM>° or less.

The angle θ<NUM> formed by the inner wall surface of the second through-hole 265A formed in the second insulating portion 225B and the extended surface of the main surface of the anode plate <NUM> is preferably, for example, <NUM>% or more and <NUM>% or less of the angle θ<NUM> formed by the inner wall surface of the second through-hole 265A formed in the first insulating portion 225A and the extended surface of the main surface of the anode plate <NUM>. The angle θ<NUM> formed by the inner wall surface of the second through-hole 265A formed in the second insulating portion 225B and the extended surface of the main surface of the anode plate <NUM> may be smaller than the angle θ<NUM> formed by the inner wall surface of the second through-hole 265A formed in the first insulating portion 225A and the extended surface of the main surface of the anode plate <NUM>.

The package board, which is one embodiment of the module of the present invention, is not limited to the embodiments, but various applications and modifications can be made within the scope of the present invention with respect to the configuration, manufacturing conditions, and the like of the package board.

When the first through-hole conductor 262A is connected to the end surface of the anode plate <NUM>, the porous portions <NUM> may not be exposed on the end surface of the anode plate <NUM> connected to the first through-hole conductor 262A. For example, part of the porous portion <NUM> may be cut out at the end surface of the anode plate <NUM> connected to the first through-hole conductor 262A so that the core portion <NUM> is in an exposed state. In this case, it is preferable that the insulating material is present in the portion where the porous portion <NUM> is cut out.

Also when the porous portions <NUM> are not exposed on the end surface of the anode plate <NUM> connected to the first through-hole conductor 262A, it is preferable that the anode connection layer <NUM> is provided between the first through-hole conductor 262A and the anode plate <NUM>, and the first through-hole conductor 262A is connected to the end surface of the anode plate <NUM> with the anode connection layer <NUM> interposed between the first through-hole conductor 262A and the end surface of the anode plate <NUM>. In addition, when viewed in section from a direction orthogonal to the thickness direction, the length of the anode connection layer <NUM> in the direction in which the first through-hole conductor 262A extends is preferably longer than the length of the anode plate <NUM> in the direction in which the first through-hole conductor 262A extends.

Although the package board has been described as one embodiment of the module of the present invention, the module of the present invention is not limited to the package board. For example, a module including a capacitor layer, a connection terminal, and a through-hole conductor may be in a form of being mounted on a mother board in a state of being connected to a voltage regulator or a load with the through-hole conductor interposed between the voltage regulator and the load.

<FIG> is a sectional view schematically illustrating an example of a module of the present invention.

A module <NUM> illustrated in <FIG> is mounted on a first main surface of a mother board <NUM> in a state of being electrically connected to a load <NUM> via through-hole conductors <NUM>, <NUM>, and <NUM>. On the other hand, a voltage regulator <NUM> and an inductor L1 are mounted on a second main surface of the mother board <NUM>.

<FIG> is a sectional view schematically illustrating a first modification of a module of the present invention.

A module 500A illustrated in <FIG> is mounted on a first main surface of a mother board <NUM> in a state of being electrically connected to a load <NUM> via through-hole conductors <NUM>, <NUM>, and <NUM> and an interposer board <NUM>. On the other hand, a voltage regulator <NUM> and an inductor L1 are mounted on a second main surface of the mother board <NUM>.

<FIG> is a sectional view schematically illustrating a second modification of a module of the present invention.

A module 500B illustrated in <FIG> is mounted on a second main surface of a mother board <NUM> in a state of being electrically connected to a voltage regulator <NUM> via through-hole conductors <NUM>, <NUM>, and <NUM>. An inductor L1 is further mounted on the second main surface of the mother board <NUM>. On the other hand, a package board <NUM> on which the load <NUM> is mounted is mounted on a first main surface of the mother board <NUM>.

<FIG> is a sectional view schematically illustrating a third modification of a module of the present invention.

A module 500C illustrated in <FIG> is mounted on a first main surface of a mother board <NUM> in a state of being electrically connected to a load <NUM> via through-hole conductors <NUM>, <NUM>, and <NUM>. A voltage regulator <NUM> and an inductor L1 are further mounted on the first main surface of the mother board <NUM>.

<FIG> is a sectional view schematically illustrating a fourth modification of a module of the present invention.

A module 500D illustrated in <FIG> is mounted on a first main surface of a mother board <NUM> in a state of being electrically connected to a voltage regulator <NUM> via through-hole conductors <NUM>, <NUM>, and <NUM>. A package board <NUM> on which a load <NUM> is mounted is further mounted on the first main surface of the mother board <NUM>. On the other hand, an inductor L1 is mounted on a second main surface of the mother board <NUM>.

Claim 1:
A module for a semiconductor composite device that supplies a direct-current voltage adjusted by a voltage regulator (<NUM>) including a semiconductor active element to a load, the module comprising:
a capacitor layer (<NUM>, 210A) that includes at least one capacitor portion (<NUM>) forming a capacitor;
a connection terminal that is used for electrical connection with at least one of the voltage regulator (<NUM>) and the load (<NUM>); and
a through-hole conductor (<NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>) that is formed to penetrate the capacitor portion (<NUM>) in a thickness direction of the capacitor layer (<NUM>),
wherein
the capacitor is electrically connected to at least one of the load (<NUM>) and the voltage regulator (<NUM>) with the through-hole conductor (<NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>) interposed between the load (<NUM>) and the voltage regulator (<NUM>),
wherein the through-hole conductor (<NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>) includes a first through-hole conductor (262A) formed in at least an inner wall surface of a first through-hole (263A) penetrating the capacitor portion (<NUM>) in the thickness direction, and
the first through-hole conductor (262A) is electrically connected to an anode of the capacitor portion (<NUM>);
wherein the capacitor portion (<NUM>) includes an anode plate (<NUM>) including metal, and
the first through-hole conductor (262A) is connected to an end surface of the anode plate (<NUM>);
characterised in that the module further comprises an anode connection layer (<NUM>) that is provided between the first through-hole conductor (262A) and the end surface of the anode plate (<NUM>), wherein
the first through-hole conductor (262A) is connected to the end surface of the anode plate (<NUM>) with the anode connection layer (<NUM>) interposed between the first through-hole conductor (262A) and the end surface of the anode plate (<NUM>),
when viewed in section from a direction orthogonal to the thickness direction, the first through-hole conductor (262A) of a portion where the anode connection layer (<NUM>) is present protrudes inward in the first through-hole (263A) as compared with the first through-hole conductor (262A) of a portion where the anode connection layer (<NUM>) is not present.