JP6630915B2 - Multilayer coil parts - Google Patents
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- JP6630915B2 JP6630915B2 JP2015199837A JP2015199837A JP6630915B2 JP 6630915 B2 JP6630915 B2 JP 6630915B2 JP 2015199837 A JP2015199837 A JP 2015199837A JP 2015199837 A JP2015199837 A JP 2015199837A JP 6630915 B2 JP6630915 B2 JP 6630915B2
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Description
本発明は、デジタル機器やＡＶ機器、情報通信端末等の各種電子機器に使用されるコモンモードノイズフィルタなどの小形の積層コイル部品に関するものである。 The present invention relates to a small laminated coil component such as a common mode noise filter used for various electronic devices such as digital devices, AV devices, and information communication terminals.
従来のこの種の積層コイル部品は、図５に示すように、ガラスからなる非磁性体層１に設けられたスパイラル状の第１のコイル導体２と、ガラスからなる他の非磁性体層３に形成され、第１のコイル導体２と積層方向に隣接するスパイラル状の第２のコイル導体４とを有していた。 As shown in FIG. 5, a conventional laminated coil component of this type includes a spiral first coil conductor 2 provided on a nonmagnetic layer 1 made of glass and another nonmagnetic layer 3 made of glass. And a spiral-shaped second coil conductor 4 adjacent to the first coil conductor 2 in the laminating direction.
また、第１、第２のコイル導体２、４はそれぞれ、めっきで構成され、Ｘ方向に長い形状をしている。さらに、第１、第２のコイル導体２、４の一端部２ａ、４ａは外部電極（図示せず）に接続され、他端部２ｂ、４ｂは、接続用電極５を介して他の第１、第２のコイル導体２、４や他の外部電極に接続されていた。そして、非磁性体層１、３の上下面にフェライト系磁性体層（図示せず）が積層されていた。 Each of the first and second coil conductors 2 and 4 is formed by plating, and has a shape elongated in the X direction. Further, one end portions 2a, 4a of the first and second coil conductors 2, 4 are connected to an external electrode (not shown), and the other end portions 2b, 4b are connected to the other first electrode 2 via connection electrodes 5. , The second coil conductors 2, 4 and other external electrodes. Ferrite magnetic layers (not shown) were laminated on the upper and lower surfaces of the non-magnetic layers 1 and 3.
なお、この出願の発明に関連する先行技術文献としては、例えば、特許文献１が知られている。 As a prior art document related to the invention of this application, for example, Patent Document 1 is known.
上記した従来の積層コイル部品においては、第１、第２のコイル導体２、４は焼成時には収縮せず、ガラスからなる非磁性体層１、３の収縮を妨げるようになるため、非磁性体層１、３が収縮しようとする応力によって第１、第２のコイル導体２、４の最内周の部分は中心方向へ引っ張る力を受け、これにより、第１、第２のコイル導体２、４の最内周の部分における非磁性体層１、３に空間が発生する可能性が生じ、この結果、積層方向に隣接するコイル導体間に大気中の水分が浸入した場合、このコイル導体間の絶縁信頼性が悪化するという課題を有していた。 In the above-described conventional laminated coil component, the first and second coil conductors 2 and 4 do not shrink during firing and hinder shrinkage of the nonmagnetic layers 1 and 3 made of glass. The innermost portions of the first and second coil conductors 2 and 4 are subjected to a pulling force toward the center due to the stress of the layers 1 and 3 shrinking, whereby the first and second coil conductors 2 and 4, there is a possibility that a space may be generated in the non-magnetic layers 1 and 3 in the innermost part of the outer conductor 4, and as a result, when moisture in the air enters between the coil conductors adjacent in the stacking direction, There is a problem that the insulation reliability of the device deteriorates.
本発明は上記従来の課題を解決するもので、絶縁信頼性を向上させることができる積層コイル部品を提供することを目的とするものである。 An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a laminated coil component capable of improving insulation reliability.
上記目的を解決するために本発明は、ガラスで構成された絶縁層と、前記絶縁層に積層され、渦巻状に形成されたコイル導体と、前記絶縁層を挟むように形成されたフェライト系の磁性体層とを備え、前記コイル導体の最内周の内側にダミーパターンを設けた。 In order to solve the above object, the present invention provides an insulating layer made of glass, a coil conductor laminated on the insulating layer and formed in a spiral shape, and a ferrite-based coil formed so as to sandwich the insulating layer. And a dummy pattern provided inside the innermost circumference of the coil conductor.
本発明の積層コイル部品は、ダミーパターンによって、コイル導体の最内周の部分が中心方向へ引っ張る力を受けにくくなり、また、空洞が生じても空洞はダミーパターンの周囲に存在するため、積層方向に隣接するコイル導体間の絶縁信頼性を向上させることができるという効果を奏するものである。 In the laminated coil component of the present invention, the dummy pattern makes it difficult for the innermost portion of the coil conductor to receive a pulling force toward the center, and even if a cavity is formed, the cavity exists around the dummy pattern. This has the effect that the insulation reliability between the coil conductors adjacent in the direction can be improved.
図１は本発明に係る積層コイル部品の一実施の形態としてのコモンモードノイズフィルタを示す断面図、図２は同コモンモードノイズフィルタの斜視図、図３は同コモンモードノイズフィルタの主要部の上面図である。 FIG. 1 is a cross-sectional view showing a common mode noise filter as an embodiment of the laminated coil component according to the present invention, FIG. 2 is a perspective view of the common mode noise filter, and FIG. It is a top view.
本発明の一実施の形態におけるコイル部品は、図１に示すように、第１の非磁性体部１１と、第１の非磁性体部１１を挟み込む第１の磁性体部１２および第２の磁性体部１３と、第１の非磁性体部１１内に埋設されＡｇで構成された第１のコイル１４、第２のコイル１５と、第１の磁性体部１２、第２の磁性体部１３を挟み込んでコモンモードノイズフィルタの最も外側に位置する第２の非磁性体部１６とを備えている。 As shown in FIG. 1, a coil component according to an embodiment of the present invention includes a first non-magnetic member 11, a first magnetic member 12 sandwiching the first non-magnetic member 11, and a second non-magnetic member 12. A magnetic body portion 13, a first coil 14, a second coil 15 embedded in the first non-magnetic body portion 11 and made of Ag, a first magnetic body portion 12, a second magnetic body portion And a second non-magnetic portion 16 located on the outermost side of the common mode noise filter with the component 13 interposed therebetween.
上記構成において、前記第１の非磁性体部１１は、複数の絶縁層１１ａを積層することによって形成され、また、この第１の非磁性体部１１（複数の絶縁層１１ａ）は、ガラスとＳｉＯ２で構成されたフィラーとを含有している。 In the above configuration, the first non-magnetic part 11 is formed by laminating a plurality of insulating layers 11a, and the first non-magnetic part 11 (a plurality of insulating layers 11a) is made of glass. And a filler composed of SiO 2 .
また、前記第１の磁性体部１２は、第１の非磁性体部１１の下面に積層され、シート状に構成されたＮｉ−Ｃｕ−Ｚｎフェライト等の磁性材料からなる複数の磁性体層で構成されている。 The first magnetic part 12 is composed of a plurality of magnetic layers made of a magnetic material such as Ni-Cu-Zn ferrite laminated on the lower surface of the first non-magnetic part 11 and formed in a sheet shape. It is configured.
そして、前記第２の磁性体部１３は、第１の非磁性体部１１の上面に積層され、すなわち、第１の非磁性体部１１を第１、第２の磁性体部１２、１３で挟み込んだ構成とし、そして、第２の磁性体部１３も、シート状に構成されたＮｉ−Ｃｕ−Ｚｎフェライト等の磁性材料からなる複数の磁性体層で構成されている。 The second magnetic part 13 is laminated on the upper surface of the first non-magnetic part 11, that is, the first non-magnetic part 11 is divided into the first and second magnetic parts 12 and 13. The second magnetic member 13 is also formed of a plurality of magnetic layers made of a magnetic material such as Ni-Cu-Zn ferrite formed in a sheet shape.
さらに、前記第１のコイル１４、第２のコイル１５は、第１の非磁性体部１１内に埋設され、それぞれ略渦巻状の第１、第２のコイル導体１４ａ、１５ａで形成されている。また、第１、第２のコイル導体１４ａ、１５ａは、それぞれ絶縁層１１ａにＡｇを渦巻状にめっきすることにより形成されている。そして、第１のコイル１４と第２のコイル１５が磁気結合するようになっている。 Further, the first coil 14 and the second coil 15 are buried in the first non-magnetic portion 11, and are respectively formed by first and second coil conductors 14a and 15a having a substantially spiral shape. . The first and second coil conductors 14a and 15a are formed by spirally plating Ag on the insulating layer 11a. Then, the first coil 14 and the second coil 15 are magnetically coupled.
そしてまた、前記第２の非磁性体部１６は、第１の磁性体部１２の下面、および第２の磁性体部１３の上面に積層されている、すなわち、第１の磁性体部１２、第２の磁性体部１３を挟み込んでコモンモードノイズフィルタの最も外側に位置する。また、この第２の非磁性体部１６は、複数の非磁性体層を積層することによって形成され、ガラスとＳｉＯ２で構成されたフィラーとを含有している。なお、第２の非磁性体部１６は、必ずしも設ける必要はない。 Further, the second non-magnetic member 16 is laminated on the lower surface of the first magnetic member 12 and the upper surface of the second magnetic member 13, that is, the first magnetic member 12, It is located on the outermost side of the common mode noise filter with the second magnetic part 13 interposed therebetween. Further, the second non-magnetic portion 16 is formed by laminating a plurality of non-magnetic layers, and contains glass and a filler composed of SiO 2 . Note that the second nonmagnetic portion 16 does not necessarily need to be provided.
そして、上記した構成により、図２に示すような積層体１７が形成される。また、この積層体１７の両端面には、４つの外部電極１８が設けられ、そしてこの外部電極１８はそれぞれ第１のコイル１４、第２のコイル１５の各両端部と接続されている。さらに、外部電極１８は、積層体１７の端面に樹脂と銀からなるペーストを印刷することにより形成され、またこれらの表面にめっきによってニッケルめっき層を形成するとともに、このニッケルめっき層の表面にめっきによってすずやはんだ等の低融点金属めっき層を形成する。 Then, the laminated body 17 as shown in FIG. 2 is formed by the above configuration. Further, four external electrodes 18 are provided on both end surfaces of the laminate 17, and the external electrodes 18 are connected to both end portions of the first coil 14 and the second coil 15, respectively. Further, the external electrode 18 is formed by printing a paste made of resin and silver on the end face of the laminated body 17, and a nickel plating layer is formed on these surfaces by plating, and plating is performed on the surface of the nickel plating layer. Thereby, a low melting point metal plating layer such as tin or solder is formed.
また、第１、第２のコイル導体１４ａ、１５ａは、図３に示すように、絶縁層１１ａ上において、略渦巻状で、上面視にてＸ方向に長い長方形状をしている。そして、第１コイル導体１４ａと第２のコイル導体１５ａは積層方向に隣接している。このとき、第１のコイル導体１４ａの下方に第２のコイル導体１５ａが設けられ、第１のコイル導体１４ａと、他の第１のコイル導体１４ａまたは外部電極１８とを接続するための接続用電極１９ａが形成され、第２コイル導体１５ａと、他の第２のコイル導体１５ａまたは外部電極１８とを接続するための接続用電極１９ｂが形成されている。 As shown in FIG. 3, the first and second coil conductors 14a and 15a have a substantially spiral shape on the insulating layer 11a and have a rectangular shape long in the X direction when viewed from above. And the 1st coil conductor 14a and the 2nd coil conductor 15a are adjacent in the lamination direction. At this time, a second coil conductor 15a is provided below the first coil conductor 14a, and is used for connection between the first coil conductor 14a and another first coil conductor 14a or the external electrode 18. An electrode 19a is formed, and a connection electrode 19b for connecting the second coil conductor 15a to another second coil conductor 15a or the external electrode 18 is formed.
さらに、第１、第２のコイル導体１４ａ、１５ａの最内周の内側にはダミーパターン２０が設けられている。このダミーパターン２０は第１、第２のコイル導体１４ａ、１５ａとは電気的に独立している。また、内側というのは絶縁層１１ａの中心部に近い側を言う。そして、最内周は第１、第２のコイル導体１４ａ、１５ａの最も内側にあり、かつ接続用電極１９ａ、１９ｂとその近傍を除いた部分をいう。 Further, a dummy pattern 20 is provided inside the innermost circumference of the first and second coil conductors 14a and 15a. This dummy pattern 20 is electrically independent from the first and second coil conductors 14a and 15a. The term “inside” means a side closer to the center of the insulating layer 11a. The innermost circumference is the innermost part of the first and second coil conductors 14a and 15a and refers to a portion excluding the connection electrodes 19a and 19b and the vicinity thereof.
第１のコイル導体１４ａにおけるダミーパターン２０は、接続用電極１９ａと、この接続用電極１９ａ近傍の第１のコイル導体１４ａの最内周との間、およびこのダミーパターン２０と対向する第１のコイル導体１４ａの最内周の近傍に設けられている。第２のコイル導体１５ａにおけるダミーパターン２０は、第２のコイル導体１５ａに接続される接続用電極１９ｂと、この接続用電極１９ｂ近傍の第２のコイル導体１５ａの最内周との間のみに設けられている。なお、第２のコイル導体１５ａの最内周と第１のコイル導体１４ａに接続される接続用電極１９ａとは電位差が生じるため、これらの間にはダミーパターン２０を配置しない。ダミーパターン２０を介して第２のコイル導体１５ａと第１のコイル導体１４ａ（接続用電極１９ａ）とが短絡する可能性があるからである。 The dummy pattern 20 in the first coil conductor 14a is formed between the connection electrode 19a and the innermost periphery of the first coil conductor 14a in the vicinity of the connection electrode 19a and the first pattern opposing the dummy pattern 20. It is provided near the innermost circumference of the coil conductor 14a. The dummy pattern 20 in the second coil conductor 15a is located only between the connection electrode 19b connected to the second coil conductor 15a and the innermost periphery of the second coil conductor 15a near the connection electrode 19b. Is provided. Since a potential difference occurs between the innermost circumference of the second coil conductor 15a and the connection electrode 19a connected to the first coil conductor 14a, the dummy pattern 20 is not arranged between them. This is because there is a possibility that the second coil conductor 15a and the first coil conductor 14a (the connection electrode 19a) are short-circuited via the dummy pattern 20.
このとき、ダミーパターン２０は、第１、第２のコイル導体１４ａ、１５ａのパターンに沿うように形成され、さらに、第１、第２のコイル導体１４ａ、１５ａの最内周のパターンの１周のうち１／５〜１／３と沿うようにするのが好ましい。また、ダミーパターン２０と、ダミーパターン２０近傍の第１、第２のコイル導体１４ａ、１５ａの最内周部分との距離は、第１、第２のコイル導体１４ａ、１５ａの線間距離の、１／２〜１／４とするのが好ましい。 At this time, the dummy pattern 20 is formed so as to follow the pattern of the first and second coil conductors 14a and 15a, and further forms one round of the innermost pattern of the first and second coil conductors 14a and 15a. Of these, it is preferable to set the distance along 1/5 to 1/3. The distance between the dummy pattern 20 and the innermost peripheral portions of the first and second coil conductors 14a and 15a in the vicinity of the dummy pattern 20 is equal to the distance between the first and second coil conductors 14a and 15a. It is preferable to set it to 1/2 to 1/4.
なお、図４に示すように、ダミーパターン２０は、第１、第２のコイル導体１４ａ、１５ａの最内周だけではなく、最外周にも沿うようにしてもよい。そして、ダミーパターン２０は、図３に示す箇所、数に限定されない。 As shown in FIG. 4, the dummy pattern 20 may extend along not only the innermost circumference but also the outermost circumference of the first and second coil conductors 14a and 15a. The number and the number of the dummy patterns 20 are not limited to those shown in FIG.
上記したように本発明の一実施の形態における積層コイル部品においては、第１、第２のコイル導体１４ａ、１５ａの最内周にダミーパターン２０を設けているため、第１、第２のコイル導体１４ａ、１５ａの最内周の部分が中心方向へ引っ張る力を受けにくくなり、また、空間が生じても空間はダミーパターン２０の内側に存在するため、絶縁信頼性を向上させることができるという効果が得られるものである。 As described above, in the laminated coil component according to the embodiment of the present invention, since the dummy pattern 20 is provided on the innermost periphery of the first and second coil conductors 14a and 15a, the first and second coils are provided. The innermost peripheral portions of the conductors 14a and 15a are less likely to receive a pulling force in the center direction, and even if a space is formed, the space exists inside the dummy pattern 20, so that insulation reliability can be improved. An effect can be obtained.
すなわち、ダミーパターン２０が無い場合、絶縁層１１ａのガラスが収縮しようとする力によって第１、第２のコイル導体１４ａ、１５ａの最内周に収縮応力による空間が発生し、この空間に大気中の水分が浸入すると、積層方向に隣接する第１、第２のコイル導体１４ａ、１５ａ導体間に水分が存在することになるため、絶縁信頼性が悪化する。特に、バイアスが掛かるとマイグレーションを起こし絶縁性が低下し、また、外部からの負荷（ＥＳＤ）によっても絶縁性が低下する。 That is, when there is no dummy pattern 20, a space due to contraction stress is generated in the innermost periphery of the first and second coil conductors 14a and 15a due to the force of the glass of the insulating layer 11a to shrink, and this space is in the air. When the moisture infiltrates, the moisture exists between the first and second coil conductors 14a and 15a adjacent in the laminating direction, and the insulation reliability deteriorates. In particular, when a bias is applied, migration occurs and the insulating property is reduced, and the insulating property is also reduced by an external load (ESD).
さらに、ガラスで構成された第１の非磁性体部１１の上下に異種の磁性体層１２、１３が形成されているため、焼成収縮挙動が異なり、これにより、ガラスの流動性が制限され、ガラスが空間部分を埋めることができない。また、第１、第２のコイル導体１４ａ、１５ａは、めっきで構成されている場合、絶縁層１１ａの収縮応力による力を特に受け易い。 Furthermore, since the different magnetic layers 12 and 13 are formed above and below the first non-magnetic part 11 made of glass, the firing shrinkage behavior is different, thereby restricting the fluidity of the glass, Glass cannot fill the space. When the first and second coil conductors 14a and 15a are formed by plating, the first and second coil conductors 14a and 15a are particularly susceptible to the force due to the contraction stress of the insulating layer 11a.
一方、本発明では、ダミーパターン２０の存在によって第１、第２のコイル導体１４ａ、１５ａの最内周の部分が中心方向へ引っ張る力を受けにくくなるため、空間が生じることはない。また、空間が生じてもダミーパターン２０の内側に空間が存在するため、空間に大気中の水分が浸入しても、積層方向に隣接する第１、第２のコイル導体１４ａ、１５ａ導体間に水分が存在することはない。 On the other hand, in the present invention, the presence of the dummy pattern 20 makes it difficult for the innermost portions of the first and second coil conductors 14a and 15a to receive a pulling force toward the center, so that no space is generated. Further, even if a space is formed, the space exists inside the dummy pattern 20, so that even if moisture in the air enters the space, the space between the first and second coil conductors 14a and 15a adjacent in the stacking direction. No moisture is present.
特に、０４０３サイズのような小形品では、全体のサイズ（体積）に対する金属（コイル導体）の割合が多く、また、熱容量の関係から焼成による第１の非磁性体部１１の収縮が早く収縮量も多くなるため、第１、第２のコイル導体１４ａ、１５ａの最内周の部分の中心方向へ引っ張る力が強くなり、本発明のような構成とすることが非常に効果的である。 In particular, in a small product such as 0403 size, the ratio of the metal (coil conductor) to the whole size (volume) is large, and the shrinkage of the first nonmagnetic material portion 11 due to firing is fast due to heat capacity. Therefore, the force of pulling the innermost peripheral portions of the first and second coil conductors 14a and 15a toward the center increases, and it is very effective to adopt the configuration as in the present invention.
さらに、第１、第２のコイル導体１４ａ、１５ａの長さが短い部分（Ｘ方向と直交する）は、対向する部分との距離が長いため、第１、第２のコイル導体１４ａ、１５ａの最内周の部分を中心方向へ引っ張る力がより強くなるため、第１、第２のコイル導体１４ａ、１５ａの短辺側に形成するのが効果的である。 Furthermore, since the portions where the first and second coil conductors 14a and 15a have a short length (perpendicular to the X direction) have a long distance from the opposing portions, the portions of the first and second coil conductors 14a and 15a are short. Since the force for pulling the innermost part toward the center becomes stronger, it is effective to form the first and second coil conductors 14a and 15a on the short sides.
また、第１、第２のコイル導体１４ａ、１５ａを、上面視にてＸ方向に長い略楕円形状とした場合等、少なくとも短辺側が円弧状の構成としても、本発明のような効果が得られる。 In addition, even when the first and second coil conductors 14a and 15a have a substantially elliptical shape that is long in the X direction when viewed from the top, at least the short side has an arcuate configuration, and the effect of the present invention can be obtained. Can be
なお、上記の一実施の形態では、同一絶縁層１１ａに第１、第２のコイル導体１４ａ、１５ｂのうち１つだけ有するコモンモードノイズフィルタについて説明したが、本発明は、同一絶縁層１１ａに複数の第１、第２のコイル導体１４ａ、１５ｂが並設されているアレイタイプのコモンモードノイズフィルタにも適用可能である。さらに、本発明は、そのようなコモンモードノイズフィルタ以外の積層コイル部品、例えば同一絶縁層１１ａに２本の導体パターンを螺旋状に配置して１つのスパイラル部を形成してなる積層コイル部品等にも適用可能である。 In the above-described embodiment, the common mode noise filter having only one of the first and second coil conductors 14a and 15b on the same insulating layer 11a has been described. The present invention is also applicable to an array-type common mode noise filter in which a plurality of first and second coil conductors 14a and 15b are arranged in parallel. Further, the present invention provides a multilayer coil component other than such a common mode noise filter, such as a multilayer coil component in which two conductor patterns are spirally arranged on the same insulating layer 11a to form one spiral portion. Is also applicable.
本発明に係る積層コイル部品は、絶縁信頼性を向上させることができるという効果を有するものであり、特にデジタル機器やＡＶ機器、情報通信端末等に使用される小形で薄型のコモンモードノイズフィルタ等の積層コイル部品において有用となるものである。 The laminated coil component according to the present invention has an effect of improving insulation reliability, and particularly a small and thin common mode noise filter used for digital equipment, AV equipment, information communication terminals, and the like. It is useful in the laminated coil component of the above.
１１ 第１の非磁性体部
１１ａ 絶縁層
１２，１３ 第１、第２の磁性体部
１４ａ，１５ａ 第１、第２のコイル導体
２０ ダミーパターン
DESCRIPTION OF SYMBOLS 11 1st non-magnetic material part 11a Insulating layer 12, 13 1st, 2nd magnetic material part 14a, 15a 1st, 2nd coil conductor 20 Dummy pattern
Claims (2)
2. The laminated coil component according to claim 1, wherein an innermost circumference of the coil conductor is formed in a substantially rectangular shape or a substantially elliptical shape in a top view, and the dummy pattern is formed on a short side of the coil conductor.
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| JP6778400B2 (en) | 2017-11-29 | 2020-11-04 | 株式会社村田製作所 | Multilayer coil parts |
| JP6763366B2 (en) | 2017-12-28 | 2020-09-30 | 株式会社村田製作所 | Coil parts and manufacturing method of coil parts |
| JP7126042B2 (en) * | 2018-03-15 | 2022-08-26 | パナソニックＩｐマネジメント株式会社 | common mode noise filter |
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| JP4622367B2 (en) * | 2004-07-27 | 2011-02-02 | 株式会社村田製作所 | Electronic components |
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