JP2949541B2 - Surface mount components - Google Patents
Surface mount componentsInfo
- Publication number
- JP2949541B2 JP2949541B2 JP4216081A JP21608192A JP2949541B2 JP 2949541 B2 JP2949541 B2 JP 2949541B2 JP 4216081 A JP4216081 A JP 4216081A JP 21608192 A JP21608192 A JP 21608192A JP 2949541 B2 JP2949541 B2 JP 2949541B2
- Authority
- JP
- Japan
- Prior art keywords
- external electrode
- surface mount
- component
- mounting surface
- folded portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
- H05K3/341—Surface mounted components
- H05K3/3431—Leadless components
Landscapes
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
- Ceramic Capacitors (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、回路基板等に表面実装
されて種々の電子回路を構成するコンデンサやフィルタ
等の表面実装部品に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to surface-mounted components such as capacitors and filters which are mounted on a circuit board or the like to form various electronic circuits.
【0002】[0002]
【従来の技術と課題】一般に、表面実装部品の端部に形
成されている外部電極は、回路基板等との電気的接続信
頼性を向上させるために少なくとも実装面に折り返し部
分を有していることが多い。ところで、乾式めっき法で
あるスパッタリング等の手法を用いて外部電極を部品の
端部に形成する場合、少なくとも端面と実装面にスパッ
タリングを施す必要がある。従って、少なくとも2回、
スパッタリング処理を行わなければならないため、製造
工程数のアップを招いていた。2. Description of the Related Art Generally, an external electrode formed at an end of a surface mount component has a folded portion at least on a mounting surface in order to improve the reliability of electrical connection with a circuit board or the like. Often. By the way, when the external electrodes are formed at the ends of the component by using a method such as sputtering which is a dry plating method, it is necessary to perform sputtering on at least the end faces and the mounting surface. Therefore, at least twice,
Since the sputtering process must be performed, the number of manufacturing steps is increased.
【0003】また、各スパッタリングはそれぞれ独立し
て施されるため、端面に形成される外部電極の部分と実
装面に形成される折り返し部分とが位置ずれし易く、外
部電極の寸法精度が悪いという不具合もあった。そこ
で、本発明の課題は、外部電極形成工程数が少なく、か
つ、電気的接続信頼性にも優れた表面実装部品を提供す
ることにある。In addition, since each sputtering is performed independently, the position of the external electrode formed on the end face and the folded portion formed on the mounting surface are apt to be displaced, resulting in poor dimensional accuracy of the external electrode. There was a defect. Therefore, an object of the present invention is to provide a surface mount component having a small number of external electrode forming steps and excellent in electrical connection reliability.
【0004】[0004]
【課題を解決するための手段と作用】以上の課題を解決
するため、本発明に係る表面実装部品は、少なくとも実
装面の縁部に凹部が設けられ、端面に設けた乾式めっき
膜からなる外部電極の折り返し部分が前記凹部に延在し
ていることを特徴とする。乾式めっき膜は、スパッタリ
ング、蒸着等の方法によって形成されためっき膜を意味
する。In order to solve the above-mentioned problems, a surface-mounted component according to the present invention is provided with a concave portion provided at least on an edge of a mounting surface and an externally formed dry plating film provided on an end surface. The folded portion of the electrode extends to the concave portion. The dry plating film means a plating film formed by a method such as sputtering or vapor deposition.
【0005】以上の構成において、少なくとも実装面の
縁部に凹部を設けた部品を図4に例示しためっき治具に
セットしてスパッタリング、あるいは蒸着等を施せば、
外部電極が少なくとも端面と実装面に一括して形成され
る。従って、外部電極を端面と実装面にそれぞれ独立さ
せて形成する手間が省ける。In the above configuration, if a component having a recess at least at the edge of the mounting surface is set on a plating jig shown in FIG. 4 and subjected to sputtering or vapor deposition,
External electrodes are collectively formed on at least the end surface and the mounting surface. Therefore, the labor of independently forming the external electrodes on the end surface and the mounting surface can be omitted.
【0006】[0006]
【実施例】以下、本発明に係る表面実装部品の一実施例
について添付図面を参照して説明する。図1は表面実装
部品1を実装面側から見た図である。図1に示すよう
に、表面実装部品1の実装面10には縁部に凹部10a
が設けられている。同様に他面9にも縁部に凹部9aが
設けられている。部品1の端部に形成されている外部電
極12は、その折り返し部分12aが凹部10a,9a
に延在している。外部電極12はAg,Ag−Pd,N
i,Cu等の材料からなる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a surface mount component according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a diagram of the surface mount component 1 as viewed from the mounting surface side. As shown in FIG. 1, the mounting surface 10 of the surface mount component 1 has a concave portion 10a at the edge.
Is provided. Similarly, the other surface 9 is provided with a concave portion 9a at the edge. The external electrode 12 formed at the end of the component 1 has a folded portion 12a having concave portions 10a and 9a.
Extends. The external electrode 12 is made of Ag, Ag-Pd, N
It is made of a material such as i or Cu.
【0007】次に、この表面実装部品1の製造手順を説
明する。図2に示すように、絶縁性材料からなる保護シ
ート2にて、表面に内部導体等(図示せず)を設けてい
るおよび/または設けていない内部シート3を挟んで積
み重ねる。保護シート2の縁部には、予め切欠き2aを
設けておく。積み重ねられた各シート2,3を圧着、焼
成して、図3に示す積層体とする。保護シート2に設け
ていた切欠き2aは、実装面10の凹部10a及び面9
の凹部9aとされ、容易に面9,10の凹部9a,10
aが形成できる。Next, a procedure for manufacturing the surface mount component 1 will be described. As shown in FIG. 2, a protective sheet 2 made of an insulating material is stacked with an internal sheet 3 provided with and / or not provided with internal conductors (not shown) on its surface. A notch 2 a is provided in advance at the edge of the protection sheet 2. Each of the stacked sheets 2 and 3 is press-bonded and fired to obtain a laminate shown in FIG. The notch 2 a provided in the protective sheet 2 is provided with the concave portion 10 a of the mounting surface 10 and the surface 9.
Recesses 9a, 10a of the surfaces 9, 10 easily.
a can be formed.
【0008】図4に示すように、この部品1に外部電極
を形成するため、保持治具20の凹部あるいは孔20a
に、部品1を矢印方向に挿入してセットする。図5に示
すように、部品1がセットされた状態では、凹部9a,
10aの部分と凹部20aの内壁との間に隙間が形成さ
れている。部品1をセットした後、マスク21を保持治
具20に載置する。マスク21には所望の位置に電極形
成のための穴22が設けられている。なお、マスク21
に設ける穴22の位置や径は高精度の寸法は要求されな
い。As shown in FIG. 4, in order to form an external electrode on the component 1, a concave portion or a hole 20a of the holding jig 20 is formed.
Then, the part 1 is inserted and set in the direction of the arrow. As shown in FIG. 5, when the component 1 is set, the concave portions 9a,
A gap is formed between the portion 10a and the inner wall of the recess 20a. After the component 1 is set, the mask 21 is placed on the holding jig 20. The mask 21 is provided with holes 22 for forming electrodes at desired positions. The mask 21
The positions and diameters of the holes 22 provided in the holes need not be high-precision dimensions.
【0009】次に、蒸気、あるいはスパッタリングが施
され、蒸着源あるいはスパッタリング源から飛散してき
た蒸着金属やスパッタリング金属は穴22を通過して、
部品1の端部に達し、端部に外部電極12を形成する。
このとき、蒸着金属やスパッタリング金属の一部は穴2
2を通過した後、凹部20aの内壁と部品1の凹部9
a,10aとの間に形成されている隙間に回り込んで、
凹部9a,10aの表面に外部電極12の折り返し部分
12aを形成することになる。Next, vapor or sputtering is performed, and the vapor deposition metal or sputtering metal scattered from the vapor deposition source or sputtering source passes through the hole 22 and
The end of the component 1 is reached, and the external electrode 12 is formed at the end.
At this time, a part of the deposition metal or the sputtering metal
2, the inner wall of the recess 20a and the recess 9 of the component 1
a and 10a,
The folded portion 12a of the external electrode 12 is formed on the surface of the concave portions 9a and 10a.
【0010】従って、1回の蒸着あるいはスパッタリン
グ処理により、折り返し部分12aを含めた外部電極1
2が一括して形成できるので、本実施例の外部電極形成
工程数は従来の外部電極形成工程数より少なくなる。ま
た、外部電極12は、端面部分と折り返し部分12aを
それぞれ個別に形成するものではないので、端面部分と
折り返し部分12aの位置ずれが発生せず、寸法精度の
優れた外部電極12が得られる。Therefore, the external electrode 1 including the folded portion 12a is formed by a single deposition or sputtering process.
2 can be formed collectively, so that the number of external electrode forming steps of this embodiment is smaller than that of the conventional external electrode forming step. In addition, since the external electrode 12 does not separately form the end surface portion and the folded portion 12a, no displacement occurs between the end surface portion and the folded portion 12a, and the external electrode 12 having excellent dimensional accuracy can be obtained.
【0011】以上の構成からなる表面実装部品1は、図
6に示すように、実装面10を下側にして、回路基板3
0に電気的に接続される。すなわち、外部電極12の実
装面10側の折り返し部分12aが回路基板30に設け
た取付け電極31に対向した状態で半田35にて接続さ
れる。この部品1は、リフロー又はフローのいずれの半
田付け方法を採用しても高い接続信頼性で回路基板に実
装できる。特に、リフローによる半田付け方法を採用す
る場合は、半田ペーストの塗布厚みが200μm程度で
あることから、図中に示されているAの寸法が0〜20
0μmになるように設計するのが好ましい。As shown in FIG. 6, the surface mounting component 1 having the above-described structure is mounted on the circuit board 3 with the mounting surface 10 facing downward.
0 is electrically connected. That is, the external electrode 12 is connected by the solder 35 in a state where the folded portion 12 a on the mounting surface 10 side faces the mounting electrode 31 provided on the circuit board 30. The component 1 can be mounted on a circuit board with high connection reliability by using either the reflow soldering method or the flow soldering method. In particular, when the reflow soldering method is adopted, the dimension of A shown in the figure is 0 to 20 because the applied thickness of the solder paste is about 200 μm.
It is preferable to design so as to be 0 μm.
【0012】なお、本発明に係る表面実装部品は前記実
施例に限定するものではなく、その要旨の範囲内で種々
に変形することができる。特に、外部電極は少なくとも
端面及び実装面に形成されていればよく、前記実施例の
ように必らずしも3面に形成する必要はない。The surface mount component according to the present invention is not limited to the above embodiment, but can be variously modified within the scope of the invention. In particular, the external electrodes need only be formed on at least the end face and the mounting face, and need not necessarily be formed on three faces as in the above-described embodiment.
【0013】[0013]
【発明の効果】以上の説明で明らかなように、本発明に
よれば、端面に設けた外部電極の折り返し部分が、少な
くとも実装面の縁部に設けた凹部に延在している構造と
したので、外部電極を形成する際、図4に一例として示
しためっき治具にセットして乾式めっき処理をすれば、
外部電極が少なくとも端面と実装面に一括して形成でき
る。従って、従来の外部電極形成工程数より少ない工程
数で外部電極を形成することができる表面実装部品が得
られる。As is apparent from the above description, according to the present invention, the folded portion of the external electrode provided on the end face extends to at least the concave portion provided on the edge of the mounting surface. Therefore, when forming the external electrodes, if the dry plating treatment is performed by setting the external electrodes in a plating jig shown as an example in FIG.
External electrodes can be collectively formed on at least the end face and the mounting surface. Therefore, a surface mount component capable of forming external electrodes in a smaller number of steps than the conventional number of steps for forming external electrodes is obtained.
【0014】また、外部電極は、端面部分と折り返し部
分をそれぞれ個別に形成するものではないので、端面部
分と折り返し部分の位置ずれが発生せず、寸法精度のよ
い外部電極が得られる。この結果、電気的接続信頼性に
優れたものが得られる。Further, since the external electrode does not separately form the end face portion and the folded portion, no misalignment occurs between the end face portion and the folded portion, and an external electrode with good dimensional accuracy can be obtained. As a result, one having excellent electrical connection reliability can be obtained.
【図1】本発明に係る表面実装部品の一実施例を実装面
側から見た斜視図。FIG. 1 is a perspective view of one embodiment of a surface mount component according to the present invention as viewed from a mounting surface side.
【図2】図1に示した表面実装部品の分解斜視図。FIG. 2 is an exploded perspective view of the surface mount component shown in FIG.
【図3】図1に示した表面実装部品の製造手順を説明す
るための斜視図。FIG. 3 is an exemplary perspective view for explaining a procedure for manufacturing the surface mount component shown in FIG. 1;
【図4】図3に続く製造手順を説明するための斜視図。FIG. 4 is a perspective view for explaining a manufacturing procedure following FIG. 3;
【図5】図4に続く製造手順を説明するための断面図。FIG. 5 is a sectional view for explaining the manufacturing procedure following FIG. 4;
【図6】図1に示した表面実装部品の実装状態を示す断
面図。FIG. 6 is a sectional view showing a mounting state of the surface mount component shown in FIG. 1;
【符号の説明】 1…表面実装部品 10…実装面 9a,10a…凹部 12…外部電極 12a…折り返し部分[Description of Signs] 1 ... Surface mount component 10 ... Mounting surface 9a, 10a ... Concave portion 12 ... External electrode 12a ... Folding portion
Claims (1)
れ、端面に設けた乾式めっき膜からなる外部電極の折り
返し部分が前記凹部に延在していることを特徴とする表
面実装部品。1. A surface mounting component, wherein a concave portion is provided at least at an edge of a mounting surface, and a folded portion of an external electrode formed of a dry plating film provided on an end surface extends to the concave portion.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4216081A JP2949541B2 (en) | 1992-08-13 | 1992-08-13 | Surface mount components |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4216081A JP2949541B2 (en) | 1992-08-13 | 1992-08-13 | Surface mount components |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0669061A JPH0669061A (en) | 1994-03-11 |
JP2949541B2 true JP2949541B2 (en) | 1999-09-13 |
Family
ID=16682960
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4216081A Expired - Fee Related JP2949541B2 (en) | 1992-08-13 | 1992-08-13 | Surface mount components |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2949541B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5228890B2 (en) | 2008-12-24 | 2013-07-03 | 株式会社村田製作所 | Electronic component and manufacturing method thereof |
WO2019003370A1 (en) | 2017-06-29 | 2019-01-03 | 株式会社ショ-ワ | Vehicle steering device |
-
1992
- 1992-08-13 JP JP4216081A patent/JP2949541B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH0669061A (en) | 1994-03-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |