JP2018164061A - Solid electrolytic capacitor, and mold and method for manufacturing porous sintered product to be used for solid electrolytic capacitor - Google Patents

Solid electrolytic capacitor, and mold and method for manufacturing porous sintered product to be used for solid electrolytic capacitor Download PDF

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JP2018164061A
JP2018164061A JP2017061908A JP2017061908A JP2018164061A JP 2018164061 A JP2018164061 A JP 2018164061A JP 2017061908 A JP2017061908 A JP 2017061908A JP 2017061908 A JP2017061908 A JP 2017061908A JP 2018164061 A JP2018164061 A JP 2018164061A
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pair
fixed mold
porous sintered
mold parts
sintered body
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植松　秀典
Shusuke Uematsu
秀典 植松
雅幸 高橋
Masayuki Takahashi
雅幸 高橋
武史 高松
Takeshi Takamatsu
武史 高松
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Panasonic Intellectual Property Management Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a solid electrolytic capacitor improved in physical breaking strength.SOLUTION: A solid electrolytic capacitor comprises a capacitor element having: a porous sintered product including a pair of principal faces opposed to each other; a metal lead buried in the porous sintered product and extending from one principal face of the pair of principal faces; a dielectric layer formed on the porous sintered product; and a solid electrolyte layer formed on the dielectric layer, provided that the porous sintered product includes a pair of side faces and a pair of end faces which are narrower and smaller than the pair of side faces, and each end face of the porous sintered product has a first concave portion between the pair of principal faces.SELECTED DRAWING: Figure 3

Description

本発明は、固体電解コンデンサ、および固体電解コンデンサに用いられる多孔質焼結体を製造するための金型ならびに方法に関する。   The present invention relates to a solid electrolytic capacitor, a mold and a method for producing a porous sintered body used for the solid electrolytic capacitor.

近年、電子機器の小型化および軽量化に伴って、小型かつ大容量の高周波用コンデンサが求められている。これまでにも、等価直列抵抗（ＥＳＲ）が小さく、周波数特性が優れた数多くの固体電解コンデンサが数多く提案されている。固体電解コンデンサは、典型的には、コンデンサ素子と、これを封止する樹脂外装体と、コンデンサ素子に電気的に接続され、樹脂外装体の外部に露出する陽極端子および陰極端子と、を備える。また、コンデンサ素子は、陽極端子に電気的に接続される金属製リードの一部が埋設された陽極体と、陽極体の表面に形成された誘電体層と、誘電体層の表面に形成された固体電解質層とを有する。陽極体は、タンタル、ニオブ、チタンなどの弁作用金属粒子を焼結した多孔質焼結体で構成されている。   In recent years, along with the reduction in size and weight of electronic devices, there has been a demand for small-sized and large-capacity high-frequency capacitors. A number of solid electrolytic capacitors having a low equivalent series resistance (ESR) and excellent frequency characteristics have been proposed so far. The solid electrolytic capacitor typically includes a capacitor element, a resin outer package that seals the capacitor element, and an anode terminal and a cathode terminal that are electrically connected to the capacitor element and are exposed to the outside of the resin outer body. . The capacitor element is formed on an anode body in which a part of a metal lead electrically connected to the anode terminal is embedded, a dielectric layer formed on the surface of the anode body, and a surface of the dielectric layer. And a solid electrolyte layer. The anode body is composed of a porous sintered body obtained by sintering valve action metal particles such as tantalum, niobium, and titanium.

多孔質焼結体は、通常、直方体（六面体）に成型され、固体電解質層と陰極端子との接続には導電性接着剤が用いられるが、これらの接着強度にばらつきが生じる場合があった。そこで特許文献１には、固体電解質層と陰極端子との接続強度のばらつきを抑制するために、多孔質焼結体の一部に凸部を設け、この凸部に陰極端子をはめ合うように接続することにより、接続強度を改善することが記載されている。   The porous sintered body is usually molded into a rectangular parallelepiped (hexahedron), and a conductive adhesive is used for connection between the solid electrolyte layer and the cathode terminal. Therefore, in Patent Document 1, in order to suppress variation in connection strength between the solid electrolyte layer and the cathode terminal, a convex portion is provided on a part of the porous sintered body, and the cathode terminal is fitted to the convex portion. It is described that connection strength is improved by connecting.

また、誘電体層および固体電解質層を形成する際、弁金属箔が熱収縮し変形して、固体電解コンデンサの等価直列抵抗を増大させる場合があった。そこで特許文献２には、弁金属箔の一部の領域に凹凸を設けることにより、弁金属箔の変形を防止し、等価直列抵抗を低減させることが記載されている。   Further, when forming the dielectric layer and the solid electrolyte layer, the valve metal foil may be thermally contracted and deformed to increase the equivalent series resistance of the solid electrolytic capacitor. Therefore, Patent Document 2 describes that by providing irregularities in a partial region of the valve metal foil, deformation of the valve metal foil is prevented and the equivalent series resistance is reduced.

実願昭６３−１３４０６７号（実開平２−５４２２１号）のマイクロフィルムMicrofilm of Japanese Utility Model No. Sho 63-134067 (Japanese Utility Model Application Publication No. 2-54221) 特開２０１３−１１０３４３号公報JP 2013-110343 A

図１１に示すように、多孔質焼結体（陽極体）１０１は、直方体（６面体）の形状を有し、図１２に示すように、固定した金型枠１１０（互いに着脱可能に固定された一対の第１および第２の固定金型部品１１２ａ，１１２ｂ；１１４ａ，１１４ｂ）で画定された矩形の成型空間１１６の内部にタンタルなどの金属粒子を均一に充填した後、金型枠１１０（例えば上側の第２の固定金型部品１１４ａ）に設けられた貫通孔１０３から金属製リード１０２を挿通した状態で、金型枠１１０の両側から一対のパンチ（押圧金型）１１８ａ，１１８ｂで押圧して、金属粒子を加圧成型することにより製造される。   As shown in FIG. 11, the porous sintered body (anode body) 101 has a rectangular parallelepiped (hexahedral) shape, and as shown in FIG. 12, fixed mold frames 110 (removably fixed to each other). After uniformly filling metal particles such as tantalum into the rectangular molding space 116 defined by the pair of first and second fixed mold parts 112a, 112b; 114a, 114b), the mold frame 110 ( For example, in a state where the metal lead 102 is inserted through the through-hole 103 provided in the upper second fixed mold part 114a), a pair of punches (press molds) 118a and 118b are pressed from both sides of the mold frame 110. The metal particles are manufactured by pressure molding.

しかしながら、多孔質焼結体（陽極体）１０１は、加圧成型される方向（図１２のＹ方向）に薄型に成型されるため、多孔質焼結体１０１の一方のＸＺ平面（前側面１０４ａ）および他方のＸＺ平面（後側面１０４ｂ）と金属製リード１０２との間に充填された金属粒子は、金属製リード１０２を介在しないＸＺ平面間の他の領域にある金属粒子より大きな圧力で加圧成型される。このため、多孔質焼結体１０１を構成する金属粒子の質量密度（単位体積あたりの質量）が、多孔質焼結体１０１の内部においてばらつき（密度差）が生じる場合がある。このように多孔質焼結体（陽極体）１０１の金属粒子の質量密度分布にばらつきが生じると、多孔質焼結体１０１の物理的な破壊強度が低下する（クラックが発生しやすくなる）だけでなく、静電容量が減少し、等価直列抵抗および漏れ電流の増大を招き得る。   However, since the porous sintered body (anode body) 101 is thinly formed in the pressure molding direction (Y direction in FIG. 12), one XZ plane (front side surface 104a) of the porous sintered body 101 is formed. ) And the other XZ plane (rear side surface 104b) and the metal lead 102 are applied with a pressure greater than that of metal particles in other regions between the XZ planes without the metal lead 102 interposed therebetween. It is pressure molded. For this reason, the mass density (mass per unit volume) of the metal particles constituting the porous sintered body 101 may vary (density difference) inside the porous sintered body 101. As described above, if the mass density distribution of the metal particles of the porous sintered body (anode body) 101 varies, only the physical fracture strength of the porous sintered body 101 is reduced (cracks are easily generated). Rather, the capacitance may decrease, leading to an increase in equivalent series resistance and leakage current.

そこで本発明に係る第１の態様は、コンデンサ素子を備えた固体電解コンデンサを提供するものであって、このコンデンサ素子は、対向する一対の主面を含む多孔質焼結体と、前記多孔質焼結体に埋設され、その一方の前記主面から延びる金属製リードと、前記多孔質焼結体上に形成された誘電体層と、前記誘電体層上に形成された固体電解質層と、を備え、前記多孔質焼結体は、一対の側面および該側面より狭小な一対の端面を含み、前記多孔質焼結体の一対の前記端面は、一対の前記主面の間に第１の凹部を含む。   Accordingly, a first aspect according to the present invention provides a solid electrolytic capacitor including a capacitor element, and the capacitor element includes a porous sintered body including a pair of opposing main surfaces, and the porous element. A metal lead embedded in the sintered body and extending from one main surface thereof, a dielectric layer formed on the porous sintered body, and a solid electrolyte layer formed on the dielectric layer; The porous sintered body includes a pair of side surfaces and a pair of end surfaces narrower than the side surfaces, and the pair of end surfaces of the porous sintered body is a first between the pair of main surfaces. Including a recess.

また本発明に係る第２の態様は、コンデンサ素子を備えた固体電解コンデンサを提供するものであって、このコンデンサ素子は、対向する一対の主面を含む多孔質焼結体と、前記多孔質焼結体に埋設され、その一方の前記主面から延びる金属製リードと、多孔質焼結体上に形成された誘電体層と、前記誘電体層上に形成された固体電解質層と、を備え、前記多孔質焼結体は、一対の側面および該側面より狭小な一対の端面を含み、前記多孔質焼結体の一対の側面は、一対の主面の間に凸部を含む。   According to a second aspect of the present invention, there is provided a solid electrolytic capacitor provided with a capacitor element. The capacitor element includes a porous sintered body including a pair of opposed main surfaces, and the porous element. A metal lead embedded in the sintered body and extending from one of the main surfaces, a dielectric layer formed on the porous sintered body, and a solid electrolyte layer formed on the dielectric layer, The porous sintered body includes a pair of side surfaces and a pair of end surfaces narrower than the side surfaces, and the pair of side surfaces of the porous sintered body includes a convex portion between the pair of main surfaces.

本発明に係る第３の態様は、金属製リードが埋設された多孔質焼結体を加圧成型するための金型を提供するものであって、この金型は、前記金属製リードに沿って対向配置された一対の第１の固定金型部品と、前記第１の固定金型部品に固定される一対の第２の固定金型部品であって、前記第２の固定金型部品の一方に前記金属製リードを挿通可能にする貫通孔を設けた一対の前記第２の固定金型部品と、前記第１および第２の固定金型部品により部分的に画定された成型空間内に挿入された金属粒子を押圧するように滑動可能な一対の押圧金型部品と、を備え、前記第１の固定金型部品のそれぞれは、前記成型空間に対向する面において、一対の前記第２の固定金型部品の間に延びる第１の凸部を含む。   According to a third aspect of the present invention, there is provided a mold for press-molding a porous sintered body in which a metal lead is embedded, and the mold follows the metal lead. A pair of first fixed mold parts and a pair of second fixed mold parts fixed to the first fixed mold part, wherein the second fixed mold parts In a molding space partially defined by a pair of the second fixed mold parts provided with a through-hole through which the metal lead can be inserted, and the first and second fixed mold parts A pair of pressing mold parts that are slidable so as to press the inserted metal particles, and each of the first fixed mold parts has a pair of second molds on a surface facing the molding space. A first convex portion extending between the fixed mold parts.

また本発明に係る第４の態様は、金属製リードが埋設された多孔質焼結体を加圧成型するための金型を提供するものであって、この金型は、前記金属製リードに沿って対向配置された一対の第１の固定金型部品と、前記第１の固定金型部品に固定される一対の第２の固定金型部品であって、前記第２の固定金型部品の一方に前記金属製リードを挿通可能にする貫通孔を設けた一対の前記第２の固定金型部品と、前記第１および第２の固定金型部品により画定された成型空間内に挿入された金属粒子を押圧するように互いに対して滑動可能な一対の押圧金型部品と、を備え、前記押圧金型部品のそれぞれは、前記成型空間に対向する面において、一対の前記第２の固定金型部品の間に延びる凹部を含む。   According to a fourth aspect of the present invention, there is provided a mold for press-molding a porous sintered body in which a metal lead is embedded, and the mold is formed on the metal lead. A pair of first fixed mold parts disposed opposite to each other, and a pair of second fixed mold parts fixed to the first fixed mold parts, wherein the second fixed mold parts The metal lead is inserted into a molding space defined by the pair of the second fixed mold parts and the first and second fixed mold parts. A pair of pressing mold parts slidable with respect to each other so as to press the metal particles, and each of the pressing mold parts is a pair of the second fixed parts on the surface facing the molding space. Includes a recess extending between the mold parts.

さらに本発明に係る第５の態様は、多孔質焼結体の製造方法を提供するものであって、この製造方法は、対向する一対の第１の固定金型部品のそれぞれを、対向する一対の第２の固定金型部品に固定する工程と、一対の前記押圧金型部品を、前記第１および第２の固定金型部品に対して滑動可能に配置して成型空間を画定する工程と、前記成型空間内に金属粒子を充填する工程と、一対の前記第２の固定金型部品の一方に設けられた貫通孔に金属製リードを挿通する工程と、前記金属粒子から前記多孔質焼結体を成型するように一対の前記押圧金型部品を互いに対して押圧する工程と、を有し、前記第１の固定金型部品のそれぞれは、前記成型空間に対向する面において、一対の前記第２の固定金型部品の間に延びる第１の凸部を含む。   Furthermore, a fifth aspect according to the present invention provides a method for manufacturing a porous sintered body, which includes a pair of opposing first fixed mold parts. Fixing to the second fixed mold part, and slidably disposing the pair of pressing mold parts with respect to the first and second fixed mold parts to define a molding space; A step of filling the molding space with metal particles, a step of inserting a metal lead into a through-hole provided in one of the pair of second fixed mold parts, and the porous firing from the metal particles. Pressing the pair of pressing mold parts against each other so as to mold a bonded body, and each of the first fixed mold parts has a pair of surfaces facing the molding space. A first protrusion extending between the second fixed mold parts;

また本発明に係る第６の態様は、多孔質焼結体の製造方法を提供するものであって、この製造方法は、対向する一対の第１の固定金型部品のそれぞれを、対向する一対の第２の固定金型部品に固定する工程と、一対の押圧金型部品を、第１および第２の固定金型部品に対して滑動可能に配置して成型空間を画定する工程と、前記成型空間内に金属粒子を充填する工程と、前記第２の固定金型部品の一方に設けられた貫通孔に金属製リードを挿通する工程と、前記金属粒子から前記多孔質焼結体を成型するように一対の前記押圧金型部品を互いに対して押圧する工程と、を有し、前記押圧金型部品のそれぞれは、前記成型空間に対向する面において、一対の前記第２の固定金型部品の間に延びる凹部を有する。   According to a sixth aspect of the present invention, there is provided a method for manufacturing a porous sintered body, which includes a pair of opposing first fixed mold parts. Fixing the second fixed mold part, and slidably arranging a pair of pressing mold parts with respect to the first and second fixed mold parts to define a molding space; A step of filling the molding space with metal particles, a step of inserting a metal lead into a through hole provided in one of the second fixed mold parts, and molding the porous sintered body from the metal particles A step of pressing the pair of pressing mold parts against each other, and each of the pressing mold parts is a pair of the second fixed molds on a surface facing the molding space. Has a recess extending between the parts.

本発明に係る態様によれば、物理的な破壊強度が改善された固体電解コンデンサを実現することができる。   According to the aspect of the present invention, a solid electrolytic capacitor with improved physical breaking strength can be realized.

本発明の第１の実施形態に係る固体電解コンデンサの概略的な構成を示す断面図である。It is sectional drawing which shows the schematic structure of the solid electrolytic capacitor which concerns on the 1st Embodiment of this invention. 第１の実施形態に係る多孔質焼結体（陽極体）を示す斜視図である。It is a perspective view which shows the porous sintered compact (anode body) which concerns on 1st Embodiment. 図２に示す多孔質焼結体を製造するための製造金型を示す斜視図である。It is a perspective view which shows the manufacturing metal mold | die for manufacturing the porous sintered compact shown in FIG. （ａ）は、図３に示す第１の固定金型部品および押圧金型部品のＸＹ平面に平行な断面図であり、（ｂ）〜（ｄ）は、第１の実施形態の変形例に係る第１の固定金型部品の凸部を示す断面図である。(A) is sectional drawing parallel to XY plane of the 1st fixed mold component shown in FIG. 3, and a press die component, (b)-(d) is a modification of 1st Embodiment. It is sectional drawing which shows the convex part of the 1st fixed mold component which concerns. 従来技術および第１の実施形態に係る第１の固定金型部品を用いて加圧成型した場合の金属粒子の質量密度分布をコンピュータシミュレーションして得られたＸＹ断面画像である。It is XY cross-sectional image obtained by computer simulation of the mass density distribution of the metal particle at the time of press-molding using the 1st fixed mold component which concerns on a prior art and 1st Embodiment. 第１の実施形態の別の変形例に係る製造金型を示す斜視図である。It is a perspective view which shows the manufacturing metal mold | die which concerns on another modification of 1st Embodiment. 本発明の第２の実施形態に係る多孔質焼結体（陽極体）を示す斜視図である。It is a perspective view which shows the porous sintered compact (anode body) which concerns on the 2nd Embodiment of this invention. 図７に示す多孔質焼結体を製造するための製造金型を示す斜視図である。It is a perspective view which shows the manufacturing metal mold | die for manufacturing the porous sintered compact shown in FIG. （ａ）は、図８に示す第１の固定金型部品および押圧金型部品のＸＹ平面に平行な断面図であり、（ｂ）〜（ｄ）は、第２の実施形態の変形例に係る押圧金型部品の凸部を示す断面図である。(A) is sectional drawing parallel to XY plane of the 1st fixed mold component shown in FIG. 8, and a press die component, (b)-(d) is a modification of 2nd Embodiment. It is sectional drawing which shows the convex part of the press die component which concerns. 従来技術および第２の実施形態に係る押圧金型部品を用いて加圧成型した場合の金属粒子の質量密度分布をコンピュータシミュレーションして得られたＸＹ断面画像である。It is XY cross-sectional image obtained by computer-simulating the mass density distribution of the metal particle at the time of press-molding using the press die component which concerns on a prior art and 2nd Embodiment. 従来技術に係る固体電解コンデンサの概略的な構成を示す斜視図である。It is a perspective view which shows the schematic structure of the solid electrolytic capacitor which concerns on a prior art. 図１１に示す多孔質焼結体を製造するための製造金型を示す斜視図である。It is a perspective view which shows the manufacturing metal mold | die for manufacturing the porous sintered compact shown in FIG.

添付図面を参照して本発明に係る多孔質焼結体（陽極体）を含む固体電解コンデンサの実施形態を以下説明する。各実施形態の説明において、理解を容易にするために方向を表す用語（たとえば「上下」、「左右」、「前後」、および「Ｘ，Ｙ，Ｚ」など）を適宜用いるが、これは説明のためのものであって、これらの用語は本発明を限定するものでない。なお各図面において、固体電解コンデンサの各構成部品の形状または特徴を明確にするため、これらの寸法を相対的なものとして図示し、必ずしも同一の縮尺比で表したものではない。
《実施形態１》 An embodiment of a solid electrolytic capacitor including a porous sintered body (anode body) according to the present invention will be described below with reference to the accompanying drawings. In the description of each embodiment, terms representing directions (for example, “up and down”, “left and right”, “front and rear”, and “X, Y, Z”, etc.) are used as appropriate for easy understanding. These terms are not intended to limit the invention. In addition, in each drawing, in order to clarify the shape or characteristic of each component of the solid electrolytic capacitor, these dimensions are illustrated as relative ones, and are not necessarily represented by the same scale ratio.
Embodiment 1

＜固体電解コンデンサ＞
図１を参照して、固体電解コンデンサ２０の概略的な構成について以下説明する。固体電解コンデンサ２０は、対向する３つの平面を含む略六面体の外形形状を有し、図１の断面図で示すように、コンデンサ素子１０と、コンデンサ素子１０を封止する樹脂外装体１１と、樹脂外装体１１の外部に露出する陽極端子７および陰極端子９とを備える。またコンデンサ素子１０は、陽極端子７に電気的に接続される金属製リード２の一部が埋設された多孔質焼結体（陽極体）１と、その表面に形成された誘電体層３と、誘電体層３の表面に形成された固体電解質層４と、固体電解質層４を覆う陰極層５ａ，５ｂとを有する。多孔質焼結体（陽極体）１は、タンタル、ニオブ、チタン、またはこれらの合金などの弁作用金属粒子を加圧成型して焼結させた多孔質焼結体で構成されているが、本発明はこれらの金属粒子に限定されるものではない。 <Solid electrolytic capacitor>
A schematic configuration of the solid electrolytic capacitor 20 will be described below with reference to FIG. The solid electrolytic capacitor 20 has a substantially hexahedron outer shape including three opposing planes, and as shown in the cross-sectional view of FIG. 1, a capacitor element 10, a resin outer package 11 that seals the capacitor element 10, An anode terminal 7 and a cathode terminal 9 exposed to the outside of the resin sheathing body 11 are provided. Capacitor element 10 includes porous sintered body (anode body) 1 in which a part of metal lead 2 electrically connected to anode terminal 7 is embedded, and dielectric layer 3 formed on the surface thereof. The solid electrolyte layer 4 formed on the surface of the dielectric layer 3 and the cathode layers 5a and 5b covering the solid electrolyte layer 4 are provided. The porous sintered body (anode body) 1 is composed of a porous sintered body obtained by pressure-molding and sintering valve action metal particles such as tantalum, niobium, titanium, or an alloy thereof. The present invention is not limited to these metal particles.

多孔質焼結体（陽極体）１から突出した金属製リード２の一部は、抵抗溶接等によって陽極端子７に電気的に接続される。一方、陰極層５ａ，５ｂは、樹脂外装体１１内において導電性接着材８（例えば熱硬化性樹脂と金属粒子との混合物）を介して陰極端子９に電気的に接続される。図１に示す陽極端子７および陰極端子９は、樹脂外装体１１から突出し、その下面が樹脂外装体１１の底面と同一平面上に配設されるように折曲加工されている。陽極端子７および陰極端子９の下面は、固体電解コンデンサ２０を搭載すべき基板（図示せず）との半田接続等に用いられる。   A part of the metal lead 2 protruding from the porous sintered body (anode body) 1 is electrically connected to the anode terminal 7 by resistance welding or the like. On the other hand, the cathode layers 5a and 5b are electrically connected to the cathode terminal 9 through the conductive adhesive 8 (for example, a mixture of thermosetting resin and metal particles) in the resin sheathing body 11. The anode terminal 7 and the cathode terminal 9 shown in FIG. 1 protrude from the resin sheathing body 11 and are bent so that the lower surface thereof is disposed on the same plane as the bottom surface of the resin sheathing body 11. The lower surfaces of the anode terminal 7 and the cathode terminal 9 are used for solder connection with a substrate (not shown) on which the solid electrolytic capacitor 20 is to be mounted.

＜多孔質焼結体（陽極体）＞
図２は、本発明の第１の実施形態に係る多孔質焼結体（陽極体）１を示す斜視図である。図２に示すＸ，Ｙ，Ｚ方向などを参照して、本発明の実施形態に係る多孔質焼結体について説明する。すなわち図１は、金属製リード２に沿って図２のＹＺ平面で切断したときの固体電解コンデンサ２０の断面図である。本発明に係る多孔質焼結体１は、ＸＹ平面に平行な上主面２２ａおよび下主面２２ｂと、ＹＺ平面に平行な左端面２４ａおよび右端面２４ｂと、ＸＺ平面に平行な前側面２６ａおよび後側面２６ｂとを有する。詳細後述するように、多孔質焼結体１は、押圧金型部品３６ａ，３６ｂを用いてＹ方向に加圧成型されるため、Ｙ方向に扁平し、左端面２４ａおよび右端面２４ｂは、前側面２６ａおよび後側面２６ｂより狭小となるように成型されている。また金属製リード２は、その一端部が多孔質焼結体１に埋設され、その他端部が多孔質焼結体１の上主面２２ａからＺ方向に延びている。本発明の第１の実施形態に係る多孔質焼結体１の左端面２４ａおよび右端面２４ｂはそれぞれ、その略中央に配置された凹部（「溝部」または「スリット部」ともいう。）２５ａ，２５ｂを有する。凹部２５ａ，２５ｂのＸＹ平面に平行な断面は、図２に示すような三角形状の他、部分的な円形（略半円形を含む）または台形（略台形を含む）の形状を有し、三角形状の頂点、円形の頂部、および台形の上底が左端面２４ａおよび右端面２４ｂのＹ方向の略中央に位置するように形成されてもよい。さらに多孔質焼結体１の上主面２２ａおよび下主面２２ｂにも同様の形状を有する凹部２５ａ，２５ｂを設けてもよい（図２では図示せず）。この多孔質焼結体１の上主面２２ａおよび下主面２２ｂに設ける凹部２５ａ，２５ｂは、左端面２４ａおよび右端面２４ｂに設けた凹部２５ａ，２５ｂと連続して繋がっていてもよいし、あるいは、繋がっていなくてもよい。上記説明した多孔質焼結体１の外形形状は、以下後述するように、製造金型３０が画定する成型空間４０と実質的に同一のまたは相補的な形状を有する。 <Porous sintered body (anode body)>
FIG. 2 is a perspective view showing a porous sintered body (anode body) 1 according to the first embodiment of the present invention. The porous sintered body according to the embodiment of the present invention will be described with reference to the X, Y, and Z directions shown in FIG. That is, FIG. 1 is a cross-sectional view of the solid electrolytic capacitor 20 taken along the YZ plane of FIG. The porous sintered body 1 according to the present invention includes an upper main surface 22a and a lower main surface 22b parallel to the XY plane, a left end surface 24a and a right end surface 24b parallel to the YZ plane, and a front side surface 26a parallel to the XZ plane. And a rear side surface 26b. As will be described in detail later, since the porous sintered body 1 is pressure-molded in the Y direction using the pressing mold parts 36a and 36b, it is flattened in the Y direction, and the left end surface 24a and the right end surface 24b are It is molded so as to be narrower than the side surface 26a and the rear side surface 26b. In addition, one end of the metal lead 2 is embedded in the porous sintered body 1, and the other end extends from the upper main surface 22 a of the porous sintered body 1 in the Z direction. The left end surface 24a and the right end surface 24b of the porous sintered body 1 according to the first embodiment of the present invention are respectively recessed portions (also referred to as “groove portions” or “slit portions”) 25a, which are disposed substantially at the center. 25b. The cross section of the recesses 25a and 25b parallel to the XY plane has a triangular shape as shown in FIG. 2, a partial circular shape (including a substantially semicircular shape) or a trapezoidal shape (including a substantially trapezoidal shape). The apex of the shape, the top of the circle, and the upper base of the trapezoid may be formed so as to be positioned approximately at the center in the Y direction of the left end surface 24a and the right end surface 24b. Furthermore, you may provide the recessed part 25a, 25b which has the same shape also in the upper main surface 22a and the lower main surface 22b of the porous sintered compact 1 (not shown in FIG. 2). The recesses 25a and 25b provided on the upper main surface 22a and the lower main surface 22b of the porous sintered body 1 may be continuously connected to the recesses 25a and 25b provided on the left end surface 24a and the right end surface 24b. Or it may not be connected. The outer shape of the porous sintered body 1 described above has a shape that is substantially the same as or complementary to the molding space 40 defined by the manufacturing mold 30 as described below.

＜誘電体層＞
誘電体層３は、多孔質焼結体（陽極体）１を構成する導電性材料の表面を酸化することにより、酸化被膜として形成することができる。具体的には、電解水溶液（例えば、リン酸水溶液）が満たされた化成槽に、多孔質焼結体（陽極体）１を浸漬し、突出した陽極リード２を化成槽の陽極体１に接続して、陽極酸化を行うことにより、陽極体１の表面に弁作用金属の酸化被膜からなる誘電体層３を形成することができる。電解水溶液としては、リン酸水溶液に限らず、硝酸、酢酸、硫酸などを用いることができる。 <Dielectric layer>
The dielectric layer 3 can be formed as an oxide film by oxidizing the surface of the conductive material constituting the porous sintered body (anode body) 1. Specifically, the porous sintered body (anode body) 1 is immersed in a chemical conversion tank filled with an electrolytic aqueous solution (for example, phosphoric acid aqueous solution), and the protruding anode lead 2 is connected to the anode body 1 of the chemical conversion tank. Then, by performing anodic oxidation, the dielectric layer 3 made of an oxide film of a valve action metal can be formed on the surface of the anode body 1. The electrolytic aqueous solution is not limited to a phosphoric acid aqueous solution, and nitric acid, acetic acid, sulfuric acid, and the like can be used.

＜固体電解質層＞
固体電解質層４は、誘電体層３を覆うように形成されている。固体電解質層４は、例えば、二酸化マンガン、導電性高分子などで構成されている。導電性高分子を含む固体電解質層４は、例えば、誘電体層３が形成された多孔質焼結体（陽極体）１に、モノマーやオリゴマーを含浸させ、その後、化学重合もしくは電解重合によりモノマーやオリゴマーを重合させることにより、または誘電体層３が形成された多孔質焼結体（陽極体）１に、導電性高分子の溶液または分散液を含浸し、乾燥させることにより、誘電体層３上に形成される。 <Solid electrolyte layer>
The solid electrolyte layer 4 is formed so as to cover the dielectric layer 3. The solid electrolyte layer 4 is made of, for example, manganese dioxide, a conductive polymer, or the like. The solid electrolyte layer 4 containing a conductive polymer is obtained by, for example, impregnating a porous sintered body (anode body) 1 on which a dielectric layer 3 is formed with a monomer or an oligomer, and then chemically or electrolytically polymerizing the monomer. The dielectric layer can be obtained by polymerizing the polymer or oligomer, or by impregnating the porous sintered body (anode body) 1 on which the dielectric layer 3 is formed with a conductive polymer solution or dispersion and drying it. 3 is formed.

＜多孔質焼結体（陽極体）の製造金型および製造方法＞
図３は、図２に示す多孔質焼結体１を製造するための製造金型３０を示す斜視図である。製造金型３０は、ＹＺ平面に平行に配置された一対の第１の固定金型部品３２ａ，３２ｂと、ＸＹ平面に平行に配置され、第１の固定金型部品３２ａ，３２ｂに着脱可能に固定される一対の第２の固定金型部品３４ａ，３４ｂと、ＸＺ平面に平行に配置された一対の押圧金型部品（「パンチ部品」ともいう。）３６ａ，３６ｂとを有する。図３に示す第１の固定金型部品３２ａ，３２ｂは、成型空間４０に対向する面において、多孔質焼結体１の左端面２４ａおよび右端面２４ｂの凹部２５ａ，２５ｂと相補的な形状および寸法を有するような凸部３３ａ，３３ｂを含む（図３には一方の凸部３３ａのみ示す。）。第１の固定金型部品３２ａ，３２ｂの凸部３３ａ，３３ｂは、第２の固定金型部品３４ａ，３４ｂの間において、第２の固定金型部品３４ａから第２の固定金型部品３４ｂにかけてＺ方向に延びる畝部として設けられている。 <Manufacturing mold and manufacturing method of porous sintered body (anode body)>
FIG. 3 is a perspective view showing a production mold 30 for producing the porous sintered body 1 shown in FIG. The manufacturing mold 30 is disposed in parallel with the pair of first fixed mold parts 32a and 32b parallel to the YZ plane and parallel to the XY plane, and is attachable to and detachable from the first fixed mold parts 32a and 32b. It has a pair of second fixed mold parts 34a and 34b to be fixed, and a pair of pressing mold parts (also referred to as “punch parts”) 36a and 36b arranged in parallel to the XZ plane. The first fixed mold parts 32a and 32b shown in FIG. 3 have shapes complementary to the recesses 25a and 25b of the left end surface 24a and the right end surface 24b of the porous sintered body 1 on the surface facing the molding space 40, and It includes convex portions 33a and 33b having dimensions (only one convex portion 33a is shown in FIG. 3). The protrusions 33a and 33b of the first fixed mold parts 32a and 32b extend from the second fixed mold part 34a to the second fixed mold part 34b between the second fixed mold parts 34a and 34b. It is provided as a flange extending in the Z direction.

また第２の固定金型部品３４ａ，３４ｂの一方（図中、上側の第２の固定金型部品３４ａ）は、金属製リード２を挿通させることができるような貫通孔３１を有する。第１ならびに第２の固定金型部品３２ａ，３２ｂ；３４ａ，３４ｂおよび押圧金型部品３６ａ，３６ｂは、成型空間４０を画定し、成型空間４０内において、タンタル、ニオブ、チタン、またはこれらの合金などの弁作用金属粒子を受容することができる。さらに押圧金型部品３６ａ，３６ｂのそれぞれは、成型空間４０内において互いに接近する方向（Ｙ方向）に滑動することにより、充填された弁作用金属粒子を加圧成型することができるように構成されている。このように成型空間４０内に充填された弁作用金属粒子を加圧成型して、加熱（焼結）することにより、図２に示すような多孔質焼結体１を作製することができる。   One of the second fixed mold parts 34a and 34b (the upper second fixed mold part 34a in the drawing) has a through hole 31 through which the metal lead 2 can be inserted. The first and second stationary mold parts 32a, 32b; 34a, 34b and the pressing mold parts 36a, 36b define a molding space 40, and in the molding space 40, tantalum, niobium, titanium, or an alloy thereof. It is possible to receive valve action metal particles such as Further, each of the pressing mold parts 36a and 36b is configured to be able to press-mold the filled valve action metal particles by sliding in the direction (Y direction) approaching each other in the molding space 40. ing. Thus, the porous sintered body 1 as shown in FIG. 2 can be produced by press-molding the valve action metal particles filled in the molding space 40 and heating (sintering) the particles.

図４（ａ）は、図３に示す製造金型３０のＸＹ平面に平行な断面図であり、第１の固定金型部品３２ａ，３２ｂおよび押圧金型部品３６ａ，３６ｂが図示されている。第１の固定金型部品３２ａ，３２ｂの凸部３３ａ，３３ｂは、上述のように第２の固定金型部品３４ａ，３４ｂの間においてＺ方向に延び、図４（ａ）に示すように三角形状の断面を有する。［発明が解決しようとする課題］の欄で上記説明したように、多孔質焼結体１は、加圧成型される方向（Ｙ方向）により薄く成型されるため、成型空間４０内において金属製リード２のＹ方向に隣接した領域に充填された金属粒子は、その他の領域にある金属粒子より大きな圧力で加圧成型される。換言すると、多孔質焼結体１は、成型空間４０内の金属製リード２のＸ方向に隣接した領域（すなわち図４（ａ）の楕円ハッチングで示した領域４２）に充填された金属粒子の質量密度は比較的に小さくなってしまう。このとき多孔質焼結体１を構成する金属粒子の質量密度分布にばらつき（密度差）が生じると、クラックが発生しやすくなり、静電容量を減少させ、さらに等価直列抵抗および漏れ電流を増大させ得る。   FIG. 4A is a cross-sectional view parallel to the XY plane of the manufacturing mold 30 shown in FIG. 3, and shows first fixed mold parts 32a and 32b and pressing mold parts 36a and 36b. The convex portions 33a and 33b of the first fixed mold parts 32a and 32b extend in the Z direction between the second fixed mold parts 34a and 34b as described above, and are triangular as shown in FIG. It has a cross section in shape. As described above in the section “Problems to be Solved by the Invention”, the porous sintered body 1 is thinly formed in the pressure forming direction (Y direction). The metal particles filled in the area adjacent to the lead 2 in the Y direction are pressure-molded with a pressure larger than that of the metal particles in the other areas. In other words, the porous sintered body 1 is formed of metal particles filled in a region adjacent to the X direction of the metal lead 2 in the molding space 40 (that is, a region 42 indicated by elliptical hatching in FIG. 4A). The mass density becomes relatively small. At this time, if variation (density difference) occurs in the mass density distribution of the metal particles constituting the porous sintered body 1, cracks are likely to occur, the capacitance is reduced, and the equivalent series resistance and leakage current are further increased. Can be.

しかしながら、第１の実施形態に係る第１の固定金型部品３２ａ，３２ｂには、Ｘ方向に突出した凸部３３ａ，３３ｂを設けたので、押圧金型部品３６ａ，３６ｂが成型空間４０内を互いに接近するように（Ｙ方向に）金属粒子を押圧するとき、第１の固定金型部品３２ａ，３２ｂに隣接して配置された金属粒子が、凸部３３ａ，３３ｂの斜面に沿って図４（ａ）の楕円ハッチング領域４２に向かって押し出され、この領域（「密度増大領域」ともいう。）４２の金属粒子の質量密度を増大させることができる。   However, since the first fixed mold parts 32a and 32b according to the first embodiment are provided with convex portions 33a and 33b protruding in the X direction, the press mold parts 36a and 36b are formed in the molding space 40. When the metal particles are pressed so as to approach each other (in the Y direction), the metal particles arranged adjacent to the first fixed mold parts 32a and 32b move along the slopes of the convex portions 33a and 33b as shown in FIG. Extruded toward the elliptical hatching area 42 in (a), the mass density of the metal particles in this area (also referred to as “density increasing area”) 42 can be increased.

この楕円ハッチング領域４２における金属粒子の質量密度が、従来技術に係る（成型空間４０に面した凸部を有さない）第１の固定金型部品を用いて加圧成型した場合と、第１の実施形態に係る（成型空間４０に面した凸部を有する）第１の固定金型部品３２ａ，３２ｂを用いて加圧成型した場合の金属粒子の質量密度を、コンピュータシミュレーションした結果、図４に対応する図５のカラー画像を得た。押圧金型部品３６ａ，３６ｂに隣接し、金属製リード２の中心を貫通してＹ方向に延びる位置における相対的な質量密度を１．０としたとき、従来技術の楕円ハッチング領域４２における相対的質量密度が０．９１であったところ、第１の実施形態（三角形状の断面を有する第１の固定金型部品３２ａ，３２ｂを用いた場合）の楕円ハッチング領域４２における相対的質量密度が０．９３に増大した。したがって、コンピュータシミュレーションの結果からも、明らかに、成型空間４０内の金属製リード２のＸ方向に隣接した領域４２における質量密度を増大させることができる。よって、本発明の第１の実施形態によれば、多孔質焼結体（陽極体）１の金属粒子の質量密度分布のばらつきを抑制し、その物理的な破壊強度を増大させ、静電容量を増大させ、等価直列抵抗および漏れ電流を低減させることができる。   When the mass density of the metal particles in the elliptical hatching region 42 is pressure-molded using the first fixed mold part according to the prior art (without the convex portion facing the molding space 40), FIG. 4 shows a result of computer simulation of the mass density of the metal particles in the case of pressure molding using the first fixed mold parts 32a and 32b (having convex portions facing the molding space 40) according to the embodiment of FIG. A color image corresponding to FIG. 5 was obtained. When the relative mass density at the position adjacent to the pressing die parts 36a and 36b and extending through the center of the metal lead 2 and extending in the Y direction is 1.0, relative to the elliptical hatching area 42 of the prior art. When the mass density was 0.91, the relative mass density in the elliptical hatching region 42 of the first embodiment (using the first fixed mold parts 32a and 32b having a triangular cross section) was 0. Increased to .93. Therefore, clearly from the result of the computer simulation, the mass density in the region 42 adjacent to the X direction of the metal lead 2 in the molding space 40 can be increased. Therefore, according to the first embodiment of the present invention, the dispersion of the mass density distribution of the metal particles of the porous sintered body (anode body) 1 is suppressed, the physical breaking strength is increased, and the electrostatic capacity is increased. And the equivalent series resistance and leakage current can be reduced.

上記説明した第１の固定金型部品３２ａ，３２ｂの凸部３３ａ，３３ｂは、ＸＹ平面に平行な三角形状の断面を有するものであったが、第１の実施形態の択一例に係る凸部３３ａ，３３ｂは、図４（ｂ）〜（ｄ）に示すように、部分的な円形形状（半円形状を含む）、台形形状、および略台形形状（台形の斜面が直線ではなく、下向きに凸の曲線で表される台形に類似の形状）を有していてもよい。   The convex portions 33a and 33b of the first fixed mold parts 32a and 32b described above have a triangular cross section parallel to the XY plane, but the convex portions according to an alternative example of the first embodiment. As shown in FIGS. 4B to 4D, 33a and 33b are a partial circular shape (including a semicircular shape), a trapezoidal shape, and a substantially trapezoidal shape (the slope of the trapezoid is not a straight line but downward) A shape similar to a trapezoid represented by a convex curve).

また図４（ａ）〜（ｄ）に示すように、第１の固定金型部品３２ａ，３２ｂは、互いに対して距離ａだけ離間し、各凸部３３ａ，３３ｂは金属製リード２に対して距離ｂだけ離間しており、各凸部３３ａ，３３ｂから金属製リード２までの距離ｂの合計が、第１の固定金型部品３２ａ，３２ｂの間の距離の０．９倍以下となる（２ｂ／ａ≦０．９）ように設計してもよい。   Further, as shown in FIGS. 4A to 4D, the first fixed mold parts 32a and 32b are separated from each other by a distance a, and the convex portions 33a and 33b are separated from the metal lead 2. The distance b is separated, and the sum of the distances b from the convex portions 33a and 33b to the metal lead 2 is 0.9 times or less the distance between the first fixed mold parts 32a and 32b ( 2b / a ≦ 0.9) may be designed.

さらに図４（ａ）に示すように、凸部３３ａ，３３ｂの断面が三角形状を有する場合、その斜面と第１の固定金型部品３２ａ，３２ｂとのなす角度（θ１）の正接が、成型空間４０内に挿入された金属粒子と第１の固定金型部品との間の摩擦係数（μ１）の逆数以下となるように構成してもよい（tan(θ１)≦１／μ１）。例えば、金属粒子と第１の固定金型部品との間の摩擦係数（μ１）が０．４５であるとき、ＸＹ平面において斜面と第１の固定金型部品とのなす角度（θ１）を約６６度以下に設定してもよい。これは、角度（θ１）があまりに大きくなり過ぎると、一対の押圧金型部品３６ａ，３６ｂにより金属粒子が加圧されたとき、第１の固定金型部品３２ａ，３２ｂに隣接して配置された金属粒子が、凸部３３ａ，３３ｂの斜面に沿って楕円ハッチング領域４２に向かって押し出されず、この領域４２の金属粒子の質量密度を増大させることができなくなるためである。 Further, as shown in FIG. 4A, when the cross section of the convex portions 33a and 33b has a triangular shape, the tangent of the angle (θ 1 ) between the inclined surface and the first fixed mold parts 32a and 32b is You may comprise so that it may become below the reciprocal number of the coefficient of friction ((micro | micron | mu) 1 ) between the metal particle inserted in the shaping | molding space 40, and a 1st stationary mold component (tan ((theta) 1 ) <= 1 / micro | micron | mu). 1 ). For example, when the coefficient of friction (μ 1 ) between the metal particles and the first fixed mold part is 0.45, the angle (θ 1 ) between the inclined surface and the first fixed mold part in the XY plane. May be set to about 66 degrees or less. If the angle (θ 1 ) becomes too large, when the metal particles are pressed by the pair of pressing mold parts 36a and 36b, they are arranged adjacent to the first fixed mold parts 32a and 32b. This is because the metal particles are not extruded toward the elliptical hatched region 42 along the slopes of the convex portions 33a and 33b, and the mass density of the metal particles in the region 42 cannot be increased.

また凸部３３ａ，３３ｂが図４（ｃ）に示すように台形形状を有する場合、台形の斜面を表す直線と第１の固定金型部品３２ａ，３２ｂとのなす角度（θ１）の正接が、金属粒子と第１の固定金型部品との間の摩擦係数（μ１）の逆数以下となるように構成してもよい。さらに凸部３３ａ，３３ｂが図４（ｂ）または図４（ｄ）に示すように部分的な円形形状または略台形形状を有する場合、これらを表す曲線の接線（すなわち曲線を表す関数の導関数）と第１の固定金型部品３２ａ，３２ｂとのなす角度（θ１）の正接が、金属粒子と第１の固定金型部品３２ａ，３２ｂとの間の摩擦係数（μ１）の逆数以下となるように設計してもよい。こうして加圧成型時、質量密度が比較的に低くなり得る領域４２に金属粒子を押し出すことにより、多孔質焼結体（陽極体）１全体の金属粒子の質量密度分布のばらつきを抑制することができる。 When the convex portions 33a and 33b have a trapezoidal shape as shown in FIG. 4C, the tangent of the angle (θ 1 ) between the straight line representing the trapezoidal slope and the first fixed mold parts 32a and 32b is obtained. In addition, it may be configured to be equal to or less than the reciprocal of the coefficient of friction (μ 1 ) between the metal particles and the first fixed mold part. Further, when the convex portions 33a and 33b have a partial circular shape or a substantially trapezoidal shape as shown in FIG. 4B or FIG. 4D, the tangents of the curves representing these (that is, the derivatives of the functions representing the curves). ) and the first stationary mold halves 32a, tangent of the angle (theta 1) formed between 32b is, metal particles and the first stationary mold halves 32a, following the reciprocal of the coefficient of friction (mu 1) between 32b It may be designed to be In this way, by extruding the metal particles to the region 42 where the mass density can be relatively low at the time of pressure molding, it is possible to suppress variations in the mass density distribution of the metal particles in the entire porous sintered body (anode body) 1. it can.

上記説明した第１の実施形態に係る製造金型３０は、第１の固定金型部品３２ａ，３２ｂが成型空間４０に対向する面において凸部３３ａ，３３ｂを有するものであったが、これに加えて、図６に示すように、第２の固定金型部品３４ａ，３４ｂが成型空間４０に対向する面において凸部３５ａ，３５ｂ（図６では一方の凸部３５ｂのみを示す。）を有してもよい。このように構成された製造金型３０を用いて、金属粒子を加圧成型する際、第１の固定金型部品３２ａ，３２ｂのみならず、第２の固定金型部品３４ａ，３４ｂに隣接した金属粒子を金属製リード２に向けて押し出すことにより、金属製リード２の周囲の質量密度を増大させ、金属粒子の質量密度分布のばらつきをさらに抑制することができる。   In the manufacturing mold 30 according to the first embodiment described above, the first fixed mold parts 32a and 32b have the convex portions 33a and 33b on the surface facing the molding space 40. In addition, as shown in FIG. 6, the second fixed mold parts 34 a and 34 b have convex portions 35 a and 35 b (only one convex portion 35 b is shown in FIG. 6) on the surface facing the molding space 40. May be. When pressure-molding metal particles using the manufacturing mold 30 configured as described above, not only the first fixed mold parts 32a and 32b but also the second fixed mold parts 34a and 34b are adjacent to each other. By extruding the metal particles toward the metal lead 2, the mass density around the metal lead 2 can be increased, and the variation in the mass density distribution of the metal particles can be further suppressed.

また、第２の固定金型部品３４ａ，３４ｂの凸部３３ａ，３３ｂが台形形状を有する場合、第１の固定金型部品３２ａ，３２ｂと同様、台形の斜面を表す直線と第２の固定金型部品３４ａ，３４ｂとのなす角度（θ２）の正接が、金属粒子と第１の固定金型部品との間の摩擦係数（μ２）の逆数以下となるように構成してもよい（図示せず）。さらに、凸部３５ａ，３５ｂが部分的な円形形状または略台形形状を有する場合、これらを表す曲線の接線（すなわち曲線を表す関数の導関数）と第２の固定金型部品３４ａ，３４ｂとのなす角度（θ２）の正接が、金属粒子と第２の固定金型部品３４ａ，３４ｂとの間の摩擦係数（μ２）の逆数以下となるように設計してもよい（図示せず）。
《実施形態２》 In addition, when the convex portions 33a and 33b of the second fixed mold parts 34a and 34b have a trapezoidal shape, a straight line representing a trapezoidal slope and the second fixed mold are the same as the first fixed mold parts 32a and 32b. The tangent of the angle (θ 2 ) between the mold parts 34a and 34b may be configured to be equal to or less than the reciprocal of the coefficient of friction (μ 2 ) between the metal particles and the first fixed mold part ( Not shown). Further, when the convex portions 35a and 35b have a partial circular shape or a substantially trapezoidal shape, a tangent of a curve representing these (that is, a derivative of a function representing the curve) and the second fixed mold parts 34a and 34b. The tangent of the formed angle (θ 2 ) may be designed to be equal to or less than the reciprocal of the coefficient of friction (μ 2 ) between the metal particles and the second fixed mold parts 34a and 34b (not shown). .
<< Embodiment 2 >>

図７は、本発明の第２の実施形態に係る多孔質焼結体（陽極体）１を示す、図２と同様の斜視図である。また図８は、図７に示す多孔質焼結体１を製造するための製造金型３０を示す図３と同様の斜視図である。第２の実施形態に係る多孔質焼結体１は、ＸＺ平面に平行な前側面２６ａおよび後側面２６ｂに凸部２７ａ，２７ｂを有する点を除き、第１の実施形態に係る多孔質焼結体１と同様の構成を有するので、重複する内容については説明を省略する。   FIG. 7 is a perspective view similar to FIG. 2, showing a porous sintered body (anode body) 1 according to the second embodiment of the present invention. FIG. 8 is a perspective view similar to FIG. 3 showing a manufacturing mold 30 for manufacturing the porous sintered body 1 shown in FIG. The porous sintered body 1 according to the second embodiment is porous sintered according to the first embodiment except that the front side surface 26a parallel to the XZ plane and the rear side surface 26b have convex portions 27a and 27b. Since it has the same configuration as that of the body 1, the description of the overlapping contents is omitted.

上述の通り、本発明の第２の実施形態に係る多孔質焼結体（陽極体）１は、ＸＺ平面に平行な前側面２６ａおよび後側面２６ｂに凸部２７ａ，２７ｂを有する（図７では、一方の凸部２７ａのみを図示する。）。   As described above, the porous sintered body (anode body) 1 according to the second embodiment of the present invention has the convex portions 27a and 27b on the front side surface 26a and the rear side surface 26b parallel to the XZ plane (in FIG. 7). Only one convex portion 27a is shown in the figure).

他方、第２の実施形態に係る押圧金型部品３６ａ，３６ｂは、成型空間４０に対向する面において、多孔質焼結体１の前側面２６ａおよび後側面２６ｂの凸部２７ａ，２７ｂに相補的な形状および寸法を有するような凹部３７ａ，３７ｂを含む（図８には一方の凹部３７ｂのみ示す。）。押圧金型部品３６ａ，３６ｂの凹部３７ａ，３７ｂは、第２の固定金型部品３４ａ，３４ｂの間において、第２の固定金型部品３４ａから第２の固定金型部品３４ｂにかけてＺ方向に延びる溝部として設けられている。   On the other hand, the pressing mold parts 36a and 36b according to the second embodiment are complementary to the convex portions 27a and 27b on the front side surface 26a and the rear side surface 26b of the porous sintered body 1 on the surface facing the molding space 40. Concave portions 37a and 37b having various shapes and dimensions are included (only one concave portion 37b is shown in FIG. 8). The concave portions 37a and 37b of the pressing mold parts 36a and 36b extend in the Z direction from the second fixed mold part 34a to the second fixed mold part 34b between the second fixed mold parts 34a and 34b. It is provided as a groove.

第２の固定金型部品３４ａ，３４ｂの一方（上側の第２の固定金型部品３４ａ）は、金属製リード２を挿通させることができるような貫通孔３１を有する。こうした第１ならびに第２の固定金型部品３２ａ，３２ｂ；３４ａ，３４ｂおよび押圧金型部品３６ａ，３６ｂは、成型空間４０を画定する。押圧金型部品３６ａ，３６ｂが互いに接近する方向に滑動することで成型空間４０内に充填された弁作用金属粒子を加圧成型して、加熱（焼結）することにより、図７に示すような多孔質焼結体を作製することができる。   One of the second fixed mold parts 34a and 34b (the upper second fixed mold part 34a) has a through hole 31 through which the metal lead 2 can be inserted. The first and second stationary mold parts 32a and 32b; 34a and 34b and the pressing mold parts 36a and 36b define a molding space 40. As shown in FIG. 7, the pressing metal parts 36a and 36b are slid in a direction approaching each other, and the valve action metal particles filled in the molding space 40 are pressure-molded and heated (sintered). A porous sintered body can be produced.

図９（ａ）は、図８に示す製造金型３０のＸＹ平面に平行な断面図であり、第１の固定金型部品３２ａ，３２ｂおよび押圧金型部品３６ａ，３６ｂが図示され、押圧金型部品３６ａ，３６ｂの凹部３７ａ，３７ｂは、台形形状の断面を有する。上記説明したように、多孔質焼結体１は、加圧成型される方向（Ｙ方向）により薄く成型されるため、成型空間４０内において金属製リード２のＹ方向に隣接した領域（すなわち図９（ａ）の楕円ハッチングで示した領域４３）に充填された金属粒子は、その他の領域にある金属粒子より大きな圧力で加圧成型される。したがって、多孔質焼結体１は、成型空間４０内の金属製リード２のＹ方向に隣接した領域（すなわち図９（ａ）の楕円ハッチングで示した領域４３）に充填された金属粒子の質量密度は比較的に大きくなってしまう。このとき多孔質焼結体１を構成する金属粒子の質量密度分布にばらつき（密度差）が生じて、クラックが発生しやすくなり、静電容量を減少させ、さらに等価直列抵抗および漏れ電流を増大させ得る。   FIG. 9A is a cross-sectional view of the manufacturing mold 30 shown in FIG. 8 parallel to the XY plane, showing the first fixed mold parts 32a and 32b and the pressing mold parts 36a and 36b. The concave portions 37a and 37b of the mold parts 36a and 36b have a trapezoidal cross section. As described above, since the porous sintered body 1 is thinly formed in the pressure molding direction (Y direction), the region adjacent to the Y direction of the metal lead 2 in the molding space 40 (that is, FIG. The metal particles filled in the region 43) indicated by the ellipse hatching 9 (a) are pressure-molded with a larger pressure than the metal particles in the other regions. Therefore, the porous sintered body 1 has a mass of metal particles filled in a region adjacent to the Y direction of the metal lead 2 in the molding space 40 (that is, a region 43 indicated by elliptical hatching in FIG. 9A). The density becomes relatively large. At this time, variation (density difference) occurs in the mass density distribution of the metal particles constituting the porous sintered body 1, cracks are likely to occur, capacitance is reduced, and equivalent series resistance and leakage current are increased. Can be.

しかしながら、第２の実施形態に係る押圧金型部品３６ａ，３６ｂは、Ｙ方向に形成された凹部３７ａ，３７ｂを有するので、成型空間４０内を互いに接近するように（Ｙ方向に）金属粒子を押圧するとき、凹部３７ａ，３７ｂに配置された金属粒子が、凹部３７ａ，３７ｂの斜面に沿って図９（ａ）の楕円ハッチング領域４３以外の領域に向かって押し出され、この領域（「密度低減領域」ともいう。）４３の金属粒子の質量密度を低減させて、多孔質焼結体（陽極体）１全体の金属粒子の質量密度分布のばらつきを抑制することができる。   However, since the pressing mold parts 36a and 36b according to the second embodiment have the concave portions 37a and 37b formed in the Y direction, the metal particles are placed in the molding space 40 so as to approach each other (in the Y direction). When pressing, the metal particles arranged in the recesses 37a and 37b are pushed out along the slopes of the recesses 37a and 37b toward the region other than the elliptical hatching region 43 in FIG. 9A. It is also referred to as “region”.) The mass density of the metal particles 43 can be reduced, and the dispersion of the mass density distribution of the metal particles in the entire porous sintered body (anode body) 1 can be suppressed.

この楕円ハッチング領域４３における金属粒子の質量密度について、従来技術に係る（成型空間４０に面し凹部を有さない）押圧金型部品を用いて加圧成型した場合と、第２の実施形態に係る（成型空間４０に面した凹部３７ａ，３７ｂを有する）押圧金型部品３６ａ，３６ｂを用いて加圧成型した場合の金属粒子の質量密度を、コンピュータシミュレーションした結果、図１０のカラー画像を得た。押圧金型部品３６ａ，３６ｂに隣接し、金属製リード２の中心を貫通してＹ方向に延びる位置における相対的な質量密度を１．０としたとき、従来技術の楕円ハッチング領域４３における相対的質量密度が０．９７であったところ、第２の実施形態（台形断面形状の凹部３７ａ，３７ｂを有する押圧金型部品３６ａ，３６ｂを用いた場合）の楕円ハッチング領域４３における相対的質量密度が０．９３に低減された。したがって、コンピュータシミュレーションの結果からも、明らかに、成型空間４０内の金属製リード２のＹ方向に隣接した領域４３における質量密度が低減させることができる。よって、本発明の第２の実施形態によれば、多孔質焼結体（陽極体）１の金属粒子の質量密度分布のばらつきを抑制し、その物理的な破壊強度が増大させ、静電容量を増大させ、等価直列抵抗および漏れ電流を低減させることができる。   With respect to the mass density of the metal particles in the elliptical hatching region 43, the second embodiment is applied to the case where pressure molding is performed using a pressing mold part (facing the molding space 40 and having no recess) according to the prior art. The color image of FIG. 10 is obtained as a result of computer simulation of the mass density of the metal particles when pressure molding is performed using the pressing mold parts 36a and 36b (having the concave portions 37a and 37b facing the molding space 40). It was. When the relative mass density at the position adjacent to the pressing mold parts 36a and 36b and extending in the Y direction through the center of the metal lead 2 is 1.0, the relative height in the elliptical hatching region 43 of the prior art is relative. When the mass density was 0.97, the relative mass density in the elliptical hatching region 43 of the second embodiment (when the pressing mold parts 36a and 36b having the concave portions 37a and 37b having trapezoidal cross-sectional shapes) were used. Reduced to 0.93. Therefore, clearly from the result of computer simulation, the mass density in the region 43 adjacent to the Y direction of the metal lead 2 in the molding space 40 can be reduced. Therefore, according to the second embodiment of the present invention, variation in the mass density distribution of the metal particles of the porous sintered body (anode body) 1 is suppressed, the physical breaking strength is increased, and the electrostatic capacitance And the equivalent series resistance and leakage current can be reduced.

上記説明した押圧金型部品３６ａ，３６ｂの凹部３７ａ，３７ｂは、ＸＹ平面に平行な台形形状の断面を有するものであったが、択一例に係る凹部３７ａ，３７ｂは、図９（ｂ）〜（ｄ）に示すように、半円形形状、三角形状、および半楕円形状を有していてもよい。   Although the concave portions 37a and 37b of the pressing mold parts 36a and 36b described above have a trapezoidal cross section parallel to the XY plane, the concave portions 37a and 37b according to the alternative example are illustrated in FIGS. As shown in (d), it may have a semicircular shape, a triangular shape, and a semielliptical shape.

また図９（ａ）および図９（ｃ）に示すように、凹部３７ａ，３７ｂが台形形状または三角形状の断面を有する場合、その斜面と押圧金型部品３６ａ，３６ｂとのなす角度（θ３）の正接が、成型空間４０内に挿入された金属粒子と押圧金型部品３６ａ，３６ｂとの間の摩擦係数（μ３）の逆数以下となるように構成してもよい（tan(θ３)≦１／μ３）。例えば、金属粒子と押圧金型部品３６ａ，３６ｂとの間の摩擦係数（μ３）が０．４５であるとき、ＸＹ平面において斜面と押圧金型部品３６ａ，３６ｂとのなす角度（θ３）を約６６度以下に設定してもよい。これは、角度（θ３）があまりに大きくなり過ぎると、一対の押圧金型部品３６ａ，３６ｂにより金属粒子が加圧されたとき、押圧金型部品３６ａ，３６ｂに隣接して配置された金属粒子が、凹部３７ａ，３７ｂの斜面に沿って楕円ハッチング領域４３以外の領域に向かって押し出されず、この領域４３の金属粒子の質量密度を低減させることができなくなるためである。 Further, as shown in FIGS. 9A and 9C, when the concave portions 37a and 37b have a trapezoidal or triangular cross section, an angle (θ 3) between the inclined surface and the pressing mold parts 36a and 36b is formed. ) May be configured to be equal to or less than the reciprocal of the coefficient of friction (μ 3 ) between the metal particles inserted into the molding space 40 and the pressing mold parts 36a and 36b (tan (θ 3 ) ≦ 1 / μ 3 ). For example, when the coefficient of friction (μ 3 ) between the metal particles and the pressing mold parts 36a and 36b is 0.45, the angle (θ 3 ) between the inclined surface and the pressing mold parts 36a and 36b in the XY plane. May be set to about 66 degrees or less. This is because, when the angle (θ 3 ) becomes too large, when the metal particles are pressed by the pair of pressing mold parts 36a, 36b, the metal particles arranged adjacent to the pressing mold parts 36a, 36b. However, it is not pushed out toward the area other than the elliptical hatching area 43 along the slopes of the recesses 37a and 37b, and the mass density of the metal particles in the area 43 cannot be reduced.

なお、第２の実施形態に係る多孔質焼結体１は、ＸＺ平面に平行な前側面２６ａおよび後側面２６ｂに凸部３３ａ，３３ｂを設けることに加えて、第１の実施形態と同様に、ＹＺ平面に平行な左端面２４ａおよび右端面２４ｂに凹部２５ａ，２５ｂを設けてもよい。   Note that the porous sintered body 1 according to the second embodiment is similar to the first embodiment in addition to providing the convex portions 33a and 33b on the front side surface 26a and the rear side surface 26b parallel to the XZ plane. The recesses 25a and 25b may be provided on the left end surface 24a and the right end surface 24b parallel to the YZ plane.

本発明は、陽極体として多孔質焼結体を具備する固体電解コンデンサに利用することができる。   The present invention can be used for a solid electrolytic capacitor having a porous sintered body as an anode body.

１…多孔質焼結体（陽極体）、２…金属製リード、３…誘電体層、４…固体電解質層、５…陰極層、７…陽極端子、８…導電性接着材、９…陰極端子、１０…コンデンサ素子、１１…樹脂外装体、２０…固体電解コンデンサ、２２ａ…上主面、２２ｂ…下主面、２４ａ…左端面、２４ｂ…右端面、２５ａ，２５ｂ…端面凹部、２６ａ…前側面、２６ｂ…後側面、２７ａ，２７ｂ…側面凸部、３０…製造金型、３１…貫通孔、３２ａ，３２ｂ…第１の固定金型部品、３３ａ，３３ｂ…金型凸部、３４ａ，３４ｂ…第２の固定金型部品、３６ａ，３６ｂ…押圧金型部品、３７ａ，３７ｂ…金型凹部、４０…成型空間、４２…密度増大領域、４３…密度低減領域
DESCRIPTION OF SYMBOLS 1 ... Porous sintered compact (anode body), 2 ... Metal lead, 3 ... Dielectric layer, 4 ... Solid electrolyte layer, 5 ... Cathode layer, 7 ... Anode terminal, 8 ... Conductive adhesive, 9 ... Cathode Terminals, 10: Capacitor element, 11: Resin outer package, 20: Solid electrolytic capacitor, 22a ... Upper main surface, 22b ... Lower main surface, 24a ... Left end surface, 24b ... Right end surface, 25a, 25b ... End surface recess, 26a ... Front side, 26b ... Rear side, 27a, 27b ... Side projection, 30 ... Production mold, 31 ... Through hole, 32a, 32b ... First fixed mold part, 33a, 33b ... Mold projection, 34a, 34b ... second fixed mold part, 36a, 36b ... pressing mold part, 37a, 37b ... mold recess, 40 ... molding space, 42 ... density increasing region, 43 ... density decreasing region

Claims (22)

対向する一対の主面を含む多孔質焼結体と、
前記多孔質焼結体に埋設され、その一方の前記主面から延びる金属製リードと、
前記多孔質焼結体上に形成された誘電体層と、
前記誘電体層上に形成された固体電解質層と、を備え、
前記多孔質焼結体は、一対の側面および該側面より狭小な一対の端面を含み、
前記多孔質焼結体の一対の前記端面は、一対の前記主面の間に第１の凹部を含む、コンデンサ素子を備えた固体電解コンデンサ。 A porous sintered body including a pair of opposing main surfaces;
A metal lead embedded in the porous sintered body and extending from one of the main surfaces;
A dielectric layer formed on the porous sintered body;
A solid electrolyte layer formed on the dielectric layer,
The porous sintered body includes a pair of side surfaces and a pair of end surfaces narrower than the side surfaces,
A pair of said end surfaces of the said porous sintered compact are solid electrolytic capacitors provided with the capacitor | condenser element which contains a 1st recessed part between a pair of said main surface. 前記第１の凹部は、前記多孔質焼結体の一方の前記主面から他方の前記主面にかけて延びる溝部である、請求項１に記載の固体電解コンデンサ。   The solid electrolytic capacitor according to claim 1, wherein the first recess is a groove extending from one main surface of the porous sintered body to the other main surface. 前記多孔質焼結体の前記第１の凹部は、前記主面に平行な断面において、三角形、略半円形、または略台形の断面形状を有する、請求項１または２に記載の固体電解コンデンサ。   3. The solid electrolytic capacitor according to claim 1, wherein the first concave portion of the porous sintered body has a triangular, substantially semicircular, or substantially trapezoidal cross-sectional shape in a cross section parallel to the main surface. 前記多孔質焼結体の一対の前記主面は、第２の凹部を有する請求項１〜３のいずれか１項に記載の固体電解コンデンサ。   The solid electrolytic capacitor according to claim 1, wherein the pair of main surfaces of the porous sintered body has a second recess. 前記多孔質焼結体の前記第２の凹部は、前記主面に平行な断面において、三角形、略半円形、または略台形の断面形状を有する、請求項４に記載の固体電解コンデンサ。   5. The solid electrolytic capacitor according to claim 4, wherein the second concave portion of the porous sintered body has a triangular, substantially semicircular, or substantially trapezoidal cross-sectional shape in a cross section parallel to the main surface. 対向する一対の主面を含む多孔質焼結体と、
前記多孔質焼結体に埋設され、その一方の前記主面から延びる金属製リードと、
多孔質焼結体上に形成された誘電体層と、
前記誘電体層上に形成された固体電解質層と、を備え、
前記多孔質焼結体は、一対の側面および該側面より狭小な一対の端面を含み、
前記多孔質焼結体の一対の側面は、一対の主面の間に凸部を含む、コンデンサ素子を備えた固体電解コンデンサ。 A porous sintered body including a pair of opposing main surfaces;
A metal lead embedded in the porous sintered body and extending from one of the main surfaces;
A dielectric layer formed on the porous sintered body;
A solid electrolyte layer formed on the dielectric layer,
The porous sintered body includes a pair of side surfaces and a pair of end surfaces narrower than the side surfaces,
A pair of side surfaces of the porous sintered body is a solid electrolytic capacitor provided with a capacitor element including a convex portion between a pair of main surfaces. 前記多孔質焼結体の凸部は、前記主面に平行な断面において、三角形、略半円形、または略台形の断面形状を有する、請求項６に記載の固体電解コンデンサ。   The solid electrolytic capacitor according to claim 6, wherein the convex portion of the porous sintered body has a triangular, substantially semicircular, or substantially trapezoidal cross-sectional shape in a cross section parallel to the main surface. 金属製リードが埋設された多孔質焼結体を加圧成型するための金型であって、
前記金属製リードに沿って対向配置された一対の第１の固定金型部品と、
前記第１の固定金型部品に固定される一対の第２の固定金型部品であって、前記第２の固定金型部品の一方に前記金属製リードを挿通可能にする貫通孔を設けた一対の前記第２の固定金型部品と、
前記第１および第２の固定金型部品により部分的に画定された成型空間内に挿入された金属粒子を押圧するように滑動可能な一対の押圧金型部品と、を備え、
前記第１の固定金型部品のそれぞれは、前記成型空間に対向する面において、一対の前記第２の固定金型部品の間に延びる第１の凸部を含む、金型。 A mold for pressure-molding a porous sintered body in which a metal lead is embedded,
A pair of first fixed mold parts disposed opposite to each other along the metal lead;
A pair of second fixed mold components fixed to the first fixed mold component, wherein a through hole is provided in one of the second fixed mold components so that the metal lead can be inserted therethrough. A pair of said second stationary mold parts;
A pair of pressing mold parts slidable to press metal particles inserted into a molding space partially defined by the first and second fixed mold parts,
Each of the first fixed mold parts includes a first protrusion extending between the pair of second fixed mold parts on a surface facing the molding space. 前記第１の凸部は、前記第２の固定金型部品に平行な断面において、三角形、略半円形、または略台形の断面形状を有する、請求項８に記載の金型。   The mold according to claim 8, wherein the first convex portion has a triangular, substantially semicircular, or substantially trapezoidal cross-sectional shape in a cross section parallel to the second fixed mold part. 前記第１の凸部の三角形または略台形の斜面の断面形状を表す直線または曲線の接線と前記第１の固定金型部品とのなす角度（θ１）の正接が、前記金属粒子と前記第１の固定金型部品との間の摩擦係数（μ１）の逆数以下である（tan(θ１)≦１／μ１）、請求項９に記載の金型。 A tangent of an angle (θ 1 ) formed between a tangent of a straight line or a curve representing the cross-sectional shape of the triangular or substantially trapezoidal slope of the first convex portion and the first fixed mold part is the metal particle and the first The metal mold | die of Claim 9 which is below the reciprocal number of the coefficient of friction ((micro | micron | mu) 1 ) between fixed mold parts of 1 (tan ((theta) 1 ) <= 1 / (mu) 1 ). 前記第２の固定金型部品は、前記成型空間に対向する面において、前記第１の固定金型部品の間に延びる第２の凸部を有する、請求項８〜１０のいずれか１項に記載の金型。   The said 2nd fixed mold component has a 2nd convex part extended between said 1st fixed mold components in the surface facing the said molding space, The any one of Claims 8-10. The mold described. 前記第２の凸部は、前記第１の固定金型部品に平行な断面において、三角形、略半円形、または略台形の断面形状を有する、請求項１１に記載の金型。   The mold according to claim 11, wherein the second convex portion has a triangular, substantially semicircular, or substantially trapezoidal cross-sectional shape in a cross section parallel to the first fixed mold part. 前記第２の凸部の三角形または略台形の斜面の断面形状を表す直線または曲線の接線と前記第２の固定金型部品とのなす角度（θ２）の正接が、前記金属粒子と第２の固定金型部品との間の摩擦係数（μ２）の逆数以下である（tan(θ２)≦１／μ２）、請求項１２に記載の金型。 A tangent of an angle (θ 2 ) between a tangent of a straight line or a curved line representing a cross-sectional shape of the triangular or substantially trapezoidal slope of the second convex portion and the second fixed mold part is a second tangent of the metal particle and the second it is inverse following the friction coefficient (mu 2) between the fixed mold parts (tan (θ 2) ≦ 1 / μ 2), a mold according to claim 12. 金属製リードが埋設された多孔質焼結体を加圧成型するための金型であって、
前記金属製リードに沿って対向配置された一対の第１の固定金型部品と、
前記第１の固定金型部品に固定される一対の第２の固定金型部品であって、前記第２の固定金型部品の一方に前記金属製リードを挿通可能にする貫通孔を設けた一対の前記第２の固定金型部品と、
前記第１および第２の固定金型部品により画定された成型空間内に挿入された金属粒子を押圧するように互いに対して滑動可能な一対の押圧金型部品と、を備え、
前記押圧金型部品のそれぞれは、前記成型空間に対向する面において、一対の前記第２の固定金型部品の間に延びる凹部を含む、金型。 A mold for pressure-molding a porous sintered body in which a metal lead is embedded,
A pair of first fixed mold parts disposed opposite to each other along the metal lead;
A pair of second fixed mold components fixed to the first fixed mold component, wherein a through hole is provided in one of the second fixed mold components so that the metal lead can be inserted therethrough. A pair of said second stationary mold parts;
A pair of pressing mold parts slidable relative to each other so as to press the metal particles inserted into the molding space defined by the first and second fixed mold parts,
Each of the pressing mold parts includes a concave portion extending between a pair of the second fixed mold parts on a surface facing the molding space. 前記押圧金型部品の前記凹部は、前記第２の固定金型部品に平行な断面において、三角形、略半円形、または略台形の断面形状を有する、請求項１４に記載の金型。   The mold according to claim 14, wherein the concave portion of the pressing mold part has a triangular, substantially semicircular, or substantially trapezoidal cross-sectional shape in a cross section parallel to the second fixed mold part. 前記押圧金型部品の前記凹部の三角形または略台形の斜面の断面形状を表す直線または曲線の接線と前記押圧金型部品とのなす角度（θ３）の正接が、前記金属粒子と前記押圧金型部品との間の摩擦係数（μ３）の逆数以下である（tan(θ３)≦１／μ３）、請求項１５に記載の金型。 A tangent of a straight line or a curve tangent representing the cross-sectional shape of the triangular or substantially trapezoidal slope of the concave part of the pressing mold part and the tangent of an angle (θ 3 ) between the pressing mold part is the metal particle and the pressing mold. The metal mold | die of Claim 15 which is below the reciprocal number of the coefficient of friction ((micro | micron | mu) 3 ) between mold components (tan ((theta) 3 ) <= 1 / (micro | micron | mu) 3 ). 対向する一対の第１の固定金型部品のそれぞれを、対向する一対の第２の固定金型部品に固定する工程と、
一対の押圧金型部品を、前記第１および第２の固定金型部品に対して滑動可能に配置して成型空間を画定する工程と、
前記成型空間内に金属粒子を充填する工程と、
一対の前記第２の固定金型部品の一方に設けられた貫通孔に金属製リードを挿通する工程と、
前記金属粒子から前記多孔質焼結体を成型するように一対の前記押圧金型部品を互いに対して押圧する工程と、を有し、
前記第１の固定金型部品のそれぞれは、前記成型空間に対向する面において、一対の前記第２の固定金型部品の間に延びる第１の凸部を含む、多孔質焼結体の製造方法。 Fixing each of a pair of opposed first fixed mold parts to a pair of opposed second fixed mold parts;
Disposing a pair of pressing mold parts slidably with respect to the first and second fixed mold parts to define a molding space;
Filling the molding space with metal particles;
Inserting a metal lead into a through hole provided in one of the pair of second fixed mold parts;
Pressing the pair of pressing mold parts against each other so as to mold the porous sintered body from the metal particles, and
Each of the first fixed mold parts includes a first convex portion that extends between a pair of the second fixed mold parts on a surface facing the molding space. Method. 前記第１の凸部は、前記第２の金型部品に平行な断面において、三角形、略半円形、または略台形の断面形状を有する、請求項１７に記載の多孔質焼結体の製造方法。   The method for producing a porous sintered body according to claim 17, wherein the first convex portion has a cross-sectional shape of a triangle, a substantially semicircular shape, or a substantially trapezoidal shape in a cross section parallel to the second mold part. . 前記第２の固定金型部品は、前記成型空間に対向する面において、前記第１の固定金型部品の間に延びる第２の凸部を有する、請求項１７または１８に記載の多孔質焼結体の製造方法。   The porous firing according to claim 17 or 18, wherein the second fixed mold part has a second protrusion extending between the first fixed mold parts on a surface facing the molding space. A method for producing a knot. 対向する一対の第１の固定金型部品のそれぞれを、対向する一対の第２の固定金型部品に固定する工程と、
一対の押圧金型部品を、第１および第２の固定金型部品に対して滑動可能に配置して成型空間を画定する工程と、
前記成型空間内に金属粒子を充填する工程と、
前記第２の固定金型部品の一方に設けられた貫通孔に金属製リードを挿通する工程と、
前記金属粒子から前記多孔質焼結体を成型するように一対の前記押圧金型部品を互いに対して押圧する工程と、を有し、
前記押圧金型部品のそれぞれは、前記成型空間に対向する面において、一対の前記第２の固定金型部品の間に延びる凹部を有する、多孔質焼結体の製造方法。 Fixing each of a pair of opposed first fixed mold parts to a pair of opposed second fixed mold parts;
Disposing a pair of pressing mold parts slidably relative to the first and second stationary mold parts to define a molding space;
Filling the molding space with metal particles;
Inserting a metal lead through a through hole provided in one of the second fixed mold parts;
Pressing the pair of pressing mold parts against each other so as to mold the porous sintered body from the metal particles, and
Each of the pressing mold parts has a recess extending between a pair of the second fixed mold parts on the surface facing the molding space. 前記凹部は、前記第２の固定金型部品に平行な断面において、三角形、略半円形、または略台形の断面形状を有する、請求項２０に記載の多孔質焼結体の製造方法。   21. The method for manufacturing a porous sintered body according to claim 20, wherein the recess has a triangular, substantially semicircular, or substantially trapezoidal cross-sectional shape in a cross section parallel to the second fixed mold part. 前記凹部の三角形または台形の形状を有する斜面を表す直線と前記押圧金型部品とのなす角度（θ３）の正接が金属粒子と前記押圧金型部品との間の摩擦係数（μ３）の逆数以下である（tan(θ３)≦１／μ３）、請求項２１に記載の多孔質焼結体の製造方法。 The tangent of the angle (θ 3 ) between the straight line representing the inclined surface having the triangular or trapezoidal shape of the recess and the pressing mold part is the friction coefficient (μ 3 ) between the metal particles and the pressing mold part. The method for producing a porous sintered body according to claim 21, which is equal to or less than the reciprocal number (tan (θ 3 ) ≤ 1 / µ 3 ).
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109663920A (en) * 2018-12-21 2019-04-23 中国航空制造技术研究院 A kind of laminated construction solid phase increasing material manufacturing method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109663920A (en) * 2018-12-21 2019-04-23 中国航空制造技术研究院 A kind of laminated construction solid phase increasing material manufacturing method

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