JPH07320937A - Laminated coil and manufacture thereof - Google Patents
Laminated coil and manufacture thereofInfo
- Publication number
- JPH07320937A JPH07320937A JP11496294A JP11496294A JPH07320937A JP H07320937 A JPH07320937 A JP H07320937A JP 11496294 A JP11496294 A JP 11496294A JP 11496294 A JP11496294 A JP 11496294A JP H07320937 A JPH07320937 A JP H07320937A
- Authority
- JP
- Japan
- Prior art keywords
- insulating
- coil
- insulating agent
- agent
- laminated
- 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.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、積層型コイル、特にト
ランスやフィルタ等として使用される積層型コイル及び
その製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated coil, and more particularly to a laminated coil used as a transformer or a filter and a method for manufacturing the same.
【０００２】[0002]
【発明の背景と課題】コイル用導体を設けた複数枚の絶
縁体シートを接着剤を介して積層してコイル部を構成す
ると共に、各絶縁体シートの縁部からそれぞれ突出した
コイル用導体の端部にて引出し電極を構成した積層型コ
イルが提案されている。ところが、この積層型コイル
は、コイル用導体間の耐電圧を確保するため、コイル用
導体を所定の厚さ以上で覆う絶縁膜を絶縁体シートの表
面に予め形成しておく必要があった。BACKGROUND OF THE INVENTION [PROBLEMS] To form a coil part by laminating a plurality of insulating sheets provided with coil conductors with an adhesive, and to form a coil conductor protruding from the edge of each insulating sheet. There has been proposed a laminated coil having an extraction electrode at the end. However, in this laminated coil, in order to secure the withstand voltage between the coil conductors, it is necessary to previously form an insulating film that covers the coil conductors with a predetermined thickness or more on the surface of the insulator sheet.
【０００３】通常、絶縁膜の形成工程は、絶縁剤を絶縁
体シートの表面に塗布、硬化する作業を少なくとも２回
繰り返すため生産性が悪かった。絶縁剤の脱泡は風乾で
行っていたため、絶縁剤は比較的粘度が低いものが使わ
れ、コイル用導体のエッジ部表面の絶縁剤の厚さが薄く
なり易く、一回塗りでは耐電圧性が劣るおそれがあった
からである。また、絶縁剤が流れ出し易いため、にじみ
不良も発生し易かった。Usually, in the step of forming an insulating film, the work of applying an insulating agent to the surface of an insulating sheet and curing it is repeated at least twice, so that productivity is poor. Since the defoaming of the insulating agent was done by air-drying, the insulating agent with a relatively low viscosity was used, and the thickness of the insulating agent on the surface of the edge part of the coil conductor tends to be thin, and with a single coating, withstand voltage characteristics This is because there was a risk that In addition, since the insulating agent easily flows out, defective bleeding easily occurs.
【０００４】また、接着剤による絶縁体シートの積層工
程では、接着剤を絶縁体シートの表面に塗布した後、未
硬化の状態で絶縁体シートの積み重ねを行うため、設備
に接着剤が付着し易かった。このため、設備に付着した
接着剤を頻繁に除去しなければならず、設備の保守作業
に多くの時間が取られていた。そこで、本発明の課題
は、コイル用導体間の耐電圧性に優れ、かつ、生産性が
良い積層型コイル及びその製造方法を提供することにあ
る。In addition, in the step of laminating the insulating sheet with the adhesive, the adhesive is applied to the surface of the insulating sheet, and the insulating sheets are stacked in an uncured state. It was easy. For this reason, the adhesive attached to the equipment must be frequently removed, and a lot of time is required for the maintenance work of the equipment. Therefore, an object of the present invention is to provide a laminated coil having excellent withstand voltage between coil conductors and good productivity, and a method for manufacturing the same.
【０００５】[0005]
【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、本発明に係る積層型コイルは、コイル用導体
を表面に設けた複数の絶縁体シート相互を接着機能を有
する絶縁剤を介して積層してコイル部を構成すると共
に、前記各絶縁体シートの縁部からそれぞれ突出した前
記コイル用導体の端部にて引出し電極を構成したことを
特徴とする。In order to solve the above problems, in the laminated coil according to the present invention, an insulating agent having a function of adhering a plurality of insulating sheets provided with coil conductors on the surface is used. It is characterized in that a coil portion is formed by stacking the lead-out electrodes with each other, and an extraction electrode is formed at an end portion of the coil conductor protruding from an edge portion of each insulator sheet.
【０００６】接着機能を有する絶縁剤としては、エポキ
シ樹脂、ポリウレタン樹脂、ポリイミド樹脂、フェノー
ル樹脂、ポリエステル樹脂等がある。以上の構成によ
り、絶縁剤が、コイル用導体間の耐電圧機能に加えて絶
縁体シート相互の接着機能も有するため、接着剤が不要
になる。また、接着機能を有する絶縁剤を高粘度のもの
にすることにより、絶縁剤を重ね塗りすることなく、必
要な膜厚の絶縁膜が形成される。Examples of the insulating agent having an adhesive function include epoxy resin, polyurethane resin, polyimide resin, phenol resin, polyester resin and the like. With the above structure, the insulating agent has a function of withstanding voltage between the coil conductors and also has a function of adhering the insulating sheets to each other, so that the adhesive agent is not required. Further, by making the insulating agent having an adhesive function highly viscous, an insulating film having a required film thickness can be formed without overcoating the insulating agent.
【０００７】さらに、本発明に係る積層型コイルの製造
方法は、（ａ）コイル用導体を表面に設けた複数の絶縁
体シートのそれぞれの表面に、接着機能を有する液状の
絶縁剤を塗布した後、前記液状の絶縁剤を真空脱泡する
工程と、（ｂ）前記複数の絶縁体シートを前記絶縁剤を
介して積層してコイル部を構成する工程と、（ｃ）前記
各絶縁体シートの縁部からそれぞれ突出した前記コイル
用導体の端部にて引出し電極を構成する工程と、を備え
たことを特徴とする。Further, in the method for producing a laminated coil according to the present invention, (a) a liquid insulating agent having an adhesive function is applied to each surface of a plurality of insulating sheets provided with coil conductors on the surface. After that, a step of vacuum degassing the liquid insulating agent, (b) a step of laminating the plurality of insulating sheets with the insulating agent interposed therebetween to form a coil portion, and (c) each of the insulating sheets. The step of forming an extraction electrode at the ends of the coil conductors protruding from the respective edges.
【０００８】以上の方法により、絶縁剤が高粘度のもの
であっても、絶縁剤に取り込まれている気泡が真空中に
飛散し、完全に脱泡処理が行われる。また、本発明に係
る積層型コイルの製造方法は、（ｄ）コイル用導体を表
面に設けた複数の絶縁体シートのそれぞれの表面に、接
着機能を有する液状の絶縁剤を塗布する工程と、（ｅ）
前記液状の絶縁剤を仮硬化する工程と、（ｆ）前記複数
の絶縁体シートを前記絶縁剤を介して積み重ねた後、前
記絶縁剤を本硬化させて絶縁体シート相互を絶縁剤にて
接着してコイル部を構成する工程と、（ｇ）前記各絶縁
体シートの縁部からそれぞれ突出した前記コイル用導体
の端部にて引出し電極を構成する工程と、を備えたこと
を特徴とする。By the above method, even if the insulating agent has a high viscosity, the bubbles taken in the insulating agent are scattered in a vacuum and the defoaming treatment is completely performed. Further, the method for manufacturing a laminated coil according to the present invention includes (d) a step of applying a liquid insulating agent having an adhesive function to each surface of a plurality of insulating sheets provided with coil conductors on the surface, (E)
A step of temporarily curing the liquid insulating agent, and (f) stacking the plurality of insulating sheets with the insulating agent interposed therebetween, and then finally curing the insulating agent to bond the insulating sheets to each other with the insulating agent. To form a coil part, and (g) a step of forming an extraction electrode at an end of the coil conductor protruding from an edge of each insulator sheet. .
【０００９】以上の方法により、仮硬化された絶縁剤は
非液状であるため、設備に絶縁剤が付着するおそれがな
くなる。仮硬化された絶縁剤は再加熱することにより絶
縁体シート相互を接着した後、本硬化する。By the above method, the temporarily hardened insulating agent is non-liquid, so that there is no possibility that the insulating agent adheres to the equipment. The pre-cured insulating agent is re-heated to bond the insulating sheets to each other, and then is fully cured.
【００１０】[0010]
【実施例】以下、本発明に係る積層型コイル及びその製
造方法の一実施例について添付図面を参照して説明す
る。本実施例はトランスとして使用される積層型コイル
について説明する。図１に示すように、積層型コイルは
コイル部１０、このコイル部１０を載置する端子台２
０、コア４０，５０及び樹脂製カバー３０ａ，３０ｂか
らなる。コイル部１０はコイル用導体を表面に設けた絶
縁体シートを複数枚積層して構成したものである。コイ
ル用導体を表面に設けた絶縁体シートは、以下に詳説す
る手順にて製作される。すなわち、図２に示すように、
金属箔１の上面に絶縁性樹脂膜２を設ける。金属箔１の
材料としては、導電性の優れたものが用いられる。本実
施例では銅箔を用いた。絶縁性樹脂膜２の材料として
は、耐熱性の優れたものが用いられる。本実施例では熱
硬化性樹脂であるポリイミド樹脂を用いた。絶縁性樹脂
膜２は、中央部に矩形状穴３を有している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a laminated coil and a method of manufacturing the same according to the present invention will be described below with reference to the accompanying drawings. In this embodiment, a laminated coil used as a transformer will be described. As shown in FIG. 1, the laminated coil includes a coil portion 10 and a terminal block 2 on which the coil portion 10 is mounted.
0, cores 40 and 50, and resin covers 30a and 30b. The coil portion 10 is formed by laminating a plurality of insulating sheets having a coil conductor provided on the surface thereof. The insulator sheet provided with the coil conductor on the surface is manufactured by the procedure described in detail below. That is, as shown in FIG.
An insulating resin film 2 is provided on the upper surface of the metal foil 1. As the material of the metal foil 1, a material having excellent conductivity is used. In this example, a copper foil was used. As a material for the insulating resin film 2, a material having excellent heat resistance is used. In this embodiment, a polyimide resin which is a thermosetting resin is used. The insulating resin film 2 has a rectangular hole 3 in the center.
【００１１】この絶縁性樹脂膜２は、液状の絶縁性樹脂
をスクリーン印刷の手段にて金属箔１の上面に塗布、硬
化することにより形成される。本実施例の場合、絶縁性
樹脂膜２の膜厚は約２００μｍとした。次に、図３及び
図４に示すように、液状のエッチングレジストをスクリ
ーン印刷の手段にて金属箔１の上下面に塗布、硬化する
ことにより、エッチングレジスト膜５ａ，５ｃ，５ｄ，
５ｅ，５ｇを形成する。The insulating resin film 2 is formed by applying a liquid insulating resin on the upper surface of the metal foil 1 by means of screen printing and curing it. In this embodiment, the insulating resin film 2 has a thickness of about 200 μm. Next, as shown in FIGS. 3 and 4, a liquid etching resist is applied to the upper and lower surfaces of the metal foil 1 by means of screen printing and cured, whereby the etching resist films 5a, 5c, 5d,
5e, 5g are formed.
【００１２】次に、図５及び図６に示すように、エッチ
ングレジスト膜５ａ〜５ｇから露出している金属箔１部
分をエッチングした後、エッチングレジスト膜５ａ〜５
ｇを剥離する。こうして、コイル用導体６とダミー引出
し部８ａ，８ｂを形成する。コイル用導体６は、絶縁性
樹脂膜２の矩形状穴３を中心として渦巻状に形成されて
いる。コイル用導体６の一方の端部６ａ及びダミー引出
し部８ａは絶縁性樹脂膜２の縁部から突出し、他方の端
部６ｂ及びダミー引出し部８ｂは穴３の縁部から突出し
ている。なお、ダミー引出し部８ａ，８ｂは必ずしも設
ける必要はない。Next, as shown in FIGS. 5 and 6, after etching the metal foil 1 portion exposed from the etching resist films 5a to 5g, the etching resist films 5a to 5g are formed.
g is peeled off. Thus, the coil conductor 6 and the dummy lead portions 8a and 8b are formed. The coil conductor 6 is formed in a spiral shape around the rectangular hole 3 of the insulating resin film 2. One end 6a of the coil conductor 6 and the dummy lead portion 8a project from the edge portion of the insulating resin film 2, and the other end 6b and the dummy lead portion 8b project from the edge portion of the hole 3. The dummy drawer portions 8a and 8b do not necessarily have to be provided.
【００１３】次に、図７に示すように、この絶縁体シー
ト９の表面に接着機能を有する絶縁剤１２がスクリーン
印刷等の手段により塗布される。絶縁剤１２は、絶縁体
シート９相互を接着するためと、絶縁体シート９を積層
した際にコイル用導体６に隣接する他の絶縁体シート９
上のコイル用導体６との間の耐電圧性を確保するため
と、コイル用導体６の防錆のためのものである。Next, as shown in FIG. 7, an insulating agent 12 having an adhesive function is applied to the surface of the insulating sheet 9 by means of screen printing or the like. The insulating agent 12 is used for adhering the insulating sheets 9 to each other, and for adhering the insulating sheets 9 to each other, another insulating sheet 9 adjacent to the coil conductor 6 is laminated.
This is for ensuring withstand voltage between the upper coil conductor 6 and for rust prevention of the coil conductor 6.
【００１４】絶縁剤１２としては、エポキシ樹脂、ポリ
ウレタン樹脂、ポリイミド樹脂、フェノール樹脂、ポリ
エステル樹脂等が使用される。特に、後工程の仮硬化や
シート接着を短時間で行い、生産性をアップさせるため
には熱硬化型や紫外線硬化型のものが好ましい。また、
絶縁剤１２は、一回塗りでコイル用導体６のエッジ部表
面の絶縁剤１２が所定の厚さを確保できるように高粘度
のものであることが好ましい。As the insulating agent 12, epoxy resin, polyurethane resin, polyimide resin, phenol resin, polyester resin or the like is used. In particular, a thermosetting type or an ultraviolet curing type is preferable in order to improve productivity by performing post-curing and sheet bonding in a short time. Also,
The insulating agent 12 is preferably highly viscous so that the insulating agent 12 on the surface of the edge portion of the coil conductor 6 can have a predetermined thickness after being applied once.
【００１５】本実施例では、絶縁剤１２のスクリーン印
刷条件として、スキージスピードが２５〜５０ｍｍ／ｓ
ｅｃ、印圧が０．５〜２．５ｋｇｆ／ｃｍ、印刷マスク
面と絶縁体シート９の印刷面との隙間が２．２〜３．２
ｍｍ、絶縁剤１２の粘度が２９０±７０Ｐａ・ｓｅｃ
（測定条件：Ｂ型粘度計を使用し、液温度２５℃の下、
Ｎｏ．７ロータにて１０ｒｐｍの回転速度で撹拌し
た）、絶縁剤１２のチクソ性（＝４ｒｐｍでの粘度／２
０ｒｐｍでの粘度）が１．１〜１．２とした。このスク
リーン印刷条件により、一回塗りでコイル用導体６のエ
ッジ部表面の絶縁剤１２の厚さは１０〜２５μｍであっ
た。In this embodiment, the squeegee speed is 25 to 50 mm / s as a screen printing condition for the insulating agent 12.
ec, the printing pressure is 0.5 to 2.5 kgf / cm, and the gap between the print mask surface and the print surface of the insulating sheet 9 is 2.2 to 3.2.
mm, the viscosity of the insulating agent 12 is 290 ± 70 Pa · sec
(Measurement conditions: using a B type viscometer, at a liquid temperature of 25 ° C.,
No. 7 rotors were stirred at a rotation speed of 10 rpm), the thixotropy of the insulating agent 12 (= viscosity at 4 rpm / 2)
The viscosity at 0 rpm) was 1.1 to 1.2. Under this screen printing condition, the thickness of the insulating agent 12 on the surface of the edge portion of the coil conductor 6 was 10 to 25 μm after being applied once.
【００１６】次に、絶縁体シート９に塗布された絶縁剤
１２を真空脱泡し、絶縁剤１２に取り込まれている気泡
を完全に除去する。脱泡条件は、例えば、温度が２５〜
８０℃、処理時間が５〜２０分間、真空度が３０ｍｍＨ
ｇ以下である。温度を上げるのは、絶縁剤１２の粘度を
下げて絶縁剤１２内部の気泡が真空中に飛散し易いよう
にするためである。Next, the insulating agent 12 applied to the insulating sheet 9 is vacuum degassed to completely remove the air bubbles taken in the insulating agent 12. The defoaming conditions include, for example, a temperature of 25 to
80 ° C, processing time 5-20 minutes, vacuum degree 30mmH
g or less. The reason for raising the temperature is to lower the viscosity of the insulating agent 12 so that the bubbles inside the insulating agent 12 are easily scattered in a vacuum.
【００１７】次に、オーブンやドライヤ等により絶縁剤
１２を加熱して仮硬化させる。硬化条件は、例えば、温
度が１５０〜１８０℃、加熱時間が１〜２分間である。
こうして得られたコイル用導体６を表面に設けた絶縁体
シート９は、同様にして製作された複数枚のコイル用導
体を表面に設けた絶縁体シート９や表面に何も設けられ
ていない絶縁体シート９と共に積み重ねられる。この
後、熱プレス等にて加圧しながら加熱して仮硬化した絶
縁剤１２を絶縁体シート９相互を接着した後、本硬化さ
せる。このときの硬化条件は、例えば、温度が１８０〜
２００℃、加熱時間が１〜２分間、圧力が２００〜４０
０ｇ／４ｃｍ2（４ｃｍ2は絶縁体シート９のサイズ）で
ある。Next, the insulating agent 12 is heated and temporarily cured by using an oven or a dryer. The curing conditions are, for example, a temperature of 150 to 180 ° C. and a heating time of 1 to 2 minutes.
The insulating sheet 9 having the coil conductors 6 provided on the surface thereof is the insulating sheet 9 having a plurality of coil conductors manufactured in the same manner on the surface or an insulating sheet having no surface. Stacked with body sheet 9. After that, the insulating agent 12 that is temporarily cured by heating while pressurizing with a hot press or the like is adhered to the insulating sheets 9 and then fully cured. The curing conditions at this time are, for example, a temperature of 180 to
200 ℃, heating time 1-2 minutes, pressure 200-40
0 g / 4 cm 2 (4 cm 2 is the size of the insulator sheet 9).
【００１８】こうして、図８に示すように、絶縁体シー
ト９が絶縁剤１２を介して積層されたコイル部１０が製
作される。図１に示すように、コイル用導体６の端部６
ａ，６ｂ及びダミー引出し部８ａ，８ｂは重なり合った
状態でコイル部１０の側面から突出している。上下に重
なった端部６ａ，６ｂとダミー引出し部８ａ，８ｂはス
ポット溶接により電気的に接続され、引出し電極１６と
される。コイル用導体６は引出し電極１６を介して他の
絶縁体シート９に設けられたコイル用導体６と電気的に
接続し、インダクタを形成することになる。この後、各
引出し電極１６は垂直方向に折り曲げられる。In this way, as shown in FIG. 8, the coil portion 10 in which the insulating sheet 9 is laminated with the insulating agent 12 is manufactured. As shown in FIG. 1, the end portion 6 of the coil conductor 6 is
The a and 6b and the dummy lead portions 8a and 8b project from the side surface of the coil portion 10 in an overlapping state. The vertically overlapping ends 6a, 6b and the dummy lead portions 8a, 8b are electrically connected by spot welding to form a lead electrode 16. The coil conductor 6 is electrically connected to the coil conductor 6 provided on another insulator sheet 9 via the extraction electrode 16 to form an inductor. Then, each extraction electrode 16 is bent in the vertical direction.
【００１９】なお、コイル部１０のインダクタは一つだ
け形成してもよいし、複数形成してもよい。また、各シ
ート９に設けられたコイル用導体６の接続方法を変える
ことにより、複数のインダクタを直列又は並列に接続す
ることもできる。端子台２０は、ベース部２１の上面両
側部に一定の間隔でガイド突起２２が配置されている。
ベース部２１の下面両側部にはリード端子２６の一方の
端部が一定の間隔で埋め込まれ、他方の端部はベース部
２１の下面を回り込んでベース部２１の側面に沿って延
在し、前記ガイド突起２２と共に交互に千鳥状に配置さ
れている。中央部にはコア４０の中脚部４２が貫通する
ための穴２８が設けられている。さらに、ベース部２１
の両端部の左右端部には溝２３ａ，２３ｂが設けられて
いる。It should be noted that the coil portion 10 may have only one inductor or a plurality of inductors. Further, by changing the connection method of the coil conductors 6 provided on each sheet 9, a plurality of inductors can be connected in series or in parallel. In the terminal block 20, guide protrusions 22 are arranged on both sides of the upper surface of the base portion 21 at regular intervals.
One end of the lead terminal 26 is embedded in both sides of the lower surface of the base portion 21 at regular intervals, and the other end extends around the lower surface of the base portion 21 and extends along the side surface of the base portion 21. , And the guide protrusions 22 are alternately arranged in a zigzag pattern. A hole 28 for allowing the middle leg portion 42 of the core 40 to penetrate is provided in the central portion. Further, the base portion 21
Grooves 23a and 23b are provided at the left and right ends of both ends of the.
【００２０】コイル部１０は端子台２０にガイド突起２
２に案内されて載置される。この場合、コイル部１０の
穴１０ａと端子台２０の穴２８が合うように配置され、
引出し電極１６は端子２６にスポット溶接等の手段にて
電気的に接続される。樹脂製カバー３０ａ，３０ｂはそ
れぞれ両端部に爪３２ａ，３２ｂを有し、中央部には仕
切板３４ａ，３４ｂを有している。そして、この爪３２
ａ，３２ｂがベース部２１の溝２３ａ，２３ｂに嵌め込
まれ、カバー３０ａ，３０ｂが組み付けられる。The coil portion 10 has a guide protrusion 2 on the terminal block 20.
It is guided by 2 and placed. In this case, the holes 10a of the coil portion 10 and the holes 28 of the terminal block 20 are arranged so as to be aligned,
The extraction electrode 16 is electrically connected to the terminal 26 by means such as spot welding. The resin covers 30a and 30b have claws 32a and 32b at both ends, and partition plates 34a and 34b at the center. And this claw 32
The a and 32b are fitted into the grooves 23a and 23b of the base portion 21, and the covers 30a and 30b are assembled.
【００２１】さらに、断面Ｅ字状のコア４０及び断面Ｉ
字状のコア５０が取り付けられる。コア４０は中央部に
中脚部４２、両端部に外脚部４４ａ，４４ｂ、両側部に
台形状切欠き４５ａ，４５ｂを有している。切欠き４５
ａ，４５ｂはコイル部１０の引出し電極１６を回避して
いる。中脚部４２はコイル部１０の穴１０ａ及び端子台
２０の穴２８に挿通される。コア４０と５０は突き合わ
された状態で絶縁テープ等で固定されている。なお、樹
脂製カバー３０ａ，３０ｂは必ずしも必要ではなく、埃
等が少ないところで積層型コイルを使用する場合にはカ
バー３０ａ，３０ｂを省略することができる。また、端
子台２０も同様に必ずしも必要ではなく、引出し電極１
６を直接に印刷配線板等に半田付けする場合には端子台
２０を省略することができる。Further, a core 40 having an E-shaped cross section and a cross section I
The letter-shaped core 50 is attached. The core 40 has a middle leg portion 42 at the center, outer leg portions 44a and 44b at both ends, and trapezoidal notches 45a and 45b at both sides. Cutout 45
a and 45b avoid the extraction electrode 16 of the coil portion 10. The middle leg portion 42 is inserted into the hole 10 a of the coil portion 10 and the hole 28 of the terminal block 20. The cores 40 and 50 are fixed to each other with an insulating tape or the like in an abutted state. The resin covers 30a and 30b are not always necessary, and the covers 30a and 30b can be omitted when the laminated coil is used in a place where there is little dust or the like. Similarly, the terminal block 20 is not always necessary, and the extraction electrode 1
When 6 is directly soldered to a printed wiring board or the like, the terminal block 20 can be omitted.
【００２２】こうして得られた積層型コイルにおいて、
絶縁体シート９相互が接着機能を有する絶縁剤１２によ
って強固に接着されるので、従来の接着剤が不要にな
り、製造工数が少なくてすむ。また、絶縁剤１２として
高粘度のものを使用することにより、１回のスクリーン
印刷塗りでコイル用導体６間の耐電圧性を十分に確保す
ることができる厚さの絶縁膜が得られる。具体的には、
得られた積層型コイルを５個サンプル抽出して、その耐
電圧を測定したところ、平均値が４ＫＶ、最低値が３Ｋ
Ｖであり、耐電圧の規格値（この積層型コイルの場合に
は１ＫＶ）を十分に越えていた。In the laminated coil thus obtained,
Since the insulating sheets 9 are firmly adhered to each other by the insulating agent 12 having an adhering function, the conventional adhesive agent is unnecessary and the number of manufacturing steps can be reduced. Further, by using a highly viscous insulating agent 12, it is possible to obtain an insulating film having a thickness capable of sufficiently ensuring the withstand voltage between the coil conductors 6 by one screen printing coating. In particular,
Five samples of the obtained laminated coil were sampled and the withstand voltage was measured. The average value was 4KV and the minimum value was 3K.
V, which was well above the standard value of withstand voltage (1 KV in the case of this laminated coil).
【００２３】さらに、絶縁剤１２を硬化する前に真空脱
泡することにより、絶縁剤１２が高粘度のものであって
も、絶縁剤１２に取り込まれている気泡が完全に除去さ
れる。この結果、コイル用導体６間の耐電圧性を向上さ
せることができる。表１には絶縁剤１２を真空脱泡した
場合としない場合の耐電圧を測定した結果が示されてい
る。Furthermore, by vacuum degassing before curing the insulating agent 12, even if the insulating agent 12 has a high viscosity, the bubbles taken in the insulating agent 12 are completely removed. As a result, the withstand voltage property between the coil conductors 6 can be improved. Table 1 shows the results of measuring the withstand voltage when the insulating agent 12 was degassed in vacuum and when it was not degassed.
【００２４】[0024]
【表１】 [Table 1]
【００２５】また、絶縁剤１２を仮硬化することによ
り、後工程での絶縁体シート９の取扱いが容易になり、
かつ、絶縁剤１２が設備に付着するおそれがなくなるの
で、設備保守作業を大幅に低減することができる。な
お、本発明に係る積層型コイル及びその製造方法は前記
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。Further, by temporarily curing the insulating agent 12, the insulating sheet 9 can be easily handled in a later step,
Moreover, since there is no possibility that the insulating agent 12 adheres to the equipment, the equipment maintenance work can be significantly reduced. The laminated coil and the method for manufacturing the same according to the present invention are not limited to the above-described embodiment, but can be variously modified within the scope of the gist thereof.
【００２６】前記実施例は、絶縁体シートの中央部にコ
アの中脚部を挿入するための穴を設けたものについて説
明したが、中脚部を有さないコアを使用する場合には、
このような穴を設けなくてもよい。また、トランス以外
に、フィルタ等として使用される積層型コイルであって
もよいし、コアを有さないものであってもよい。In the above-mentioned embodiment, the description has been made of the one in which the hole for inserting the middle leg portion of the core is provided in the central portion of the insulating sheet, but when the core without the middle leg portion is used,
It is not necessary to provide such a hole. Further, other than the transformer, it may be a laminated coil used as a filter or the like, or may have no core.
【００２７】[0027]
【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、コイル用導体を表面に設けた複数の絶縁体シー
ト相互を接着機能を有する絶縁剤を介して積層したの
で、接着剤を省略することができ、製造工数を少なくす
ることができる。また、接着機能を有する絶縁剤を高粘
度のものにすることにより、絶縁剤を１回塗りするだけ
で必要な膜厚の絶縁膜を形成することができる。この結
果、積層型コイルの生産性をアップさせることができ
る。As is apparent from the above description, according to the present invention, a plurality of insulating sheets provided with coil conductors on the surface are laminated via an insulating agent having an adhesive function. Can be omitted, and the number of manufacturing steps can be reduced. Further, by making the insulating agent having an adhesive function highly viscous, the insulating film having a required film thickness can be formed only by applying the insulating agent once. As a result, the productivity of the laminated coil can be increased.
【００２８】さらに、コイル用導体を表面に設けた絶縁
体シートの表面に液状の絶縁剤を塗布した後、この絶縁
剤を真空脱泡することにより、絶縁剤が完全に脱泡さ
れ、コイル用導体間の耐電圧性が向上する。また、コイ
ル用導体を表面に設けた絶縁体シートの表面に塗布され
た液状の絶縁剤を仮硬化させることにより、設備に絶縁
剤が付着するおそれがなくなり、設備保守作業を大幅に
低減することができ、生産性をさらにアップすることが
できる。Further, by applying a liquid insulating agent to the surface of the insulating sheet provided with the coil conductor on the surface and then degassing the insulating agent in vacuum, the insulating agent is completely defoamed and Withstand voltage between conductors is improved. Also, by temporarily curing the liquid insulating agent applied to the surface of the insulating sheet provided with the coil conductor on the surface, there is no risk of the insulating agent adhering to the equipment, and equipment maintenance work can be greatly reduced. The productivity can be further improved.
【図１】本発明に係る積層型コイルの一実施例を示す分
解斜視図。FIG. 1 is an exploded perspective view showing an embodiment of a laminated coil according to the present invention.
【図２】図１に示した積層型コイルに使用される絶縁体
シートの製造手順を示す斜視図。FIG. 2 is a perspective view showing a manufacturing procedure of an insulating sheet used for the laminated coil shown in FIG.
【図３】図２に続く製造手順を示す斜視図。FIG. 3 is a perspective view showing a manufacturing procedure following that of FIG. 2;
【図４】図３に示したシートを裏面から見た斜視図。FIG. 4 is a perspective view of the sheet shown in FIG. 3 viewed from the back side.
【図５】図３に続く製造手順を示す斜視図。FIG. 5 is a perspective view showing a manufacturing procedure following that of FIG. 3;
【図６】図５に示したシートを裏面から見た斜視図。FIG. 6 is a perspective view of the sheet shown in FIG. 5 as viewed from the back side.
【図７】図５に続く製造手順を示す平面図。FIG. 7 is a plan view showing the manufacturing procedure following FIG. 5;
【図８】図７のVIII−VIIIの位置の絶縁体シートの積層
状態を示す断面図。FIG. 8 is a cross-sectional view showing a laminated state of the insulator sheets at the position of VIII-VIII in FIG.
１…金属箔 ２…絶縁性樹脂膜 ６…コイル用導体 ６ａ，６ｂ…端部 ９…絶縁体シート １０…コイル部 １２…接着機能を有する絶縁剤 １６…引出し電極 DESCRIPTION OF SYMBOLS 1 ... Metal foil 2 ... Insulating resin film 6 ... Coil conductor 6a, 6b ... End part 9 ... Insulator sheet 10 ... Coil part 12 ... Adhesive insulating agent 16 ... Extraction electrode
Claims (6)
体シート相互を接着機能を有する絶縁剤を介して積層し
てコイル部を構成すると共に、前記各絶縁体シートの縁
部からそれぞれ突出した前記コイル用導体の端部にて引
出し電極を構成したことを特徴とする積層型コイル。1. A coil portion is formed by laminating a plurality of insulating sheets having coil conductors on the surface via an insulating agent having an adhesive function, and protruding from the edge portions of each insulating sheet. A laminated coil, wherein an extraction electrode is formed at an end of the coil conductor.
ことを特徴とする請求項１記載の積層型コイル。2. The laminated coil according to claim 1, wherein the insulating agent having an adhesive function has a high viscosity.
体シート相互を接着機能を有する絶縁剤を介して積層
し、コイル部を構成する工程と、 前記各絶縁体シートの縁部からそれぞれ突出した前記コ
イル用導体の端部にて引出し電極を構成する工程と、 を備えたことを特徴とする積層型コイルの製造方法。3. A step of forming a coil part by laminating a plurality of insulating sheets having coil conductors on the surface via an insulating agent having an adhesive function, and an edge part of each insulating sheet. And a step of forming an extraction electrode at the protruding end of the coil conductor, and a method for manufacturing a laminated coil, comprising:
体シートのそれぞれの表面に、接着機能を有する液状の
絶縁剤を塗布した後、前記液状の絶縁剤を真空脱泡する
工程と、 前記複数の絶縁体シートを前記絶縁剤を介して積層して
コイル部を構成する工程と、 前記各絶縁体シートの縁部からそれぞれ突出した前記コ
イル用導体の端部にて引出し電極を構成する工程と、 を備えたことを特徴とする積層型コイルの製造方法。4. A step of applying a liquid insulating agent having an adhesive function to the respective surfaces of a plurality of insulating sheets provided with coil conductors on the surface, and then degassing the liquid insulating agent in vacuum. A step of forming a coil part by laminating the plurality of insulating sheets with the insulating agent interposed therebetween; and forming an extraction electrode at an end of the coil conductor protruding from an edge of each insulating sheet. A method of manufacturing a laminated coil, comprising:
体シートのそれぞれの表面に、接着機能を有する液状の
絶縁剤を塗布する工程と、 前記液状の絶縁剤を仮硬化する工程と、 前記複数の絶縁体シートを前記絶縁剤を介して積み重ね
た後、前記絶縁剤を本硬化させて絶縁体シート相互を絶
縁剤にて接着してコイル部を構成する工程と、 前記各絶縁体シートの縁部からそれぞれ突出した前記コ
イル用導体の端部にて引出し電極を構成する工程と、 を備えたことを特徴とする積層型コイルの製造方法。5. A step of applying a liquid insulating agent having an adhesive function to the respective surfaces of a plurality of insulating sheets provided with coil conductors on the surface, and a step of temporarily curing the liquid insulating agent, A step of stacking the plurality of insulating sheets with the insulating agent interposed therebetween, followed by main curing of the insulating agent to bond the insulating sheets to each other with the insulating agent to form a coil portion; And a step of forming an extraction electrode at the ends of the coil conductors protruding from the edges of the laminated coil, respectively.
絶縁剤が高粘度であることを特徴とする請求項３，４ま
たは５記載の積層型コイルの製造方法。6. The method for producing a laminated coil according to claim 3, wherein the liquid insulating agent applied to the surface of the insulating sheet has a high viscosity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11496294A JPH07320937A (en) | 1994-05-27 | 1994-05-27 | Laminated coil and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11496294A JPH07320937A (en) | 1994-05-27 | 1994-05-27 | Laminated coil and manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07320937A true JPH07320937A (en) | 1995-12-08 |
Family
ID=14650950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11496294A Pending JPH07320937A (en) | 1994-05-27 | 1994-05-27 | Laminated coil and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07320937A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010503988A (en) * | 2006-09-12 | 2010-02-04 | クーパー テクノロジーズ カンパニー | Thin layer coil and core for magnetic components |
-
1994
- 1994-05-27 JP JP11496294A patent/JPH07320937A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010503988A (en) * | 2006-09-12 | 2010-02-04 | クーパー テクノロジーズ カンパニー | Thin layer coil and core for magnetic components |
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