JP3537288B2 - Semi-rigid coaxial cable and method of manufacturing the same - Google Patents
Semi-rigid coaxial cable and method of manufacturing the sameInfo
- Publication number
- JP3537288B2 JP3537288B2 JP10266997A JP10266997A JP3537288B2 JP 3537288 B2 JP3537288 B2 JP 3537288B2 JP 10266997 A JP10266997 A JP 10266997A JP 10266997 A JP10266997 A JP 10266997A JP 3537288 B2 JP3537288 B2 JP 3537288B2
- Authority
- JP
- Japan
- Prior art keywords
- insulator
- layer
- outer periphery
- metal layer
- insulating layer
- 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
Description
【０００１】[0001]
【産業上の利用分野】本発明は、同軸ケーブルおよびそ
の製造方法に関し、特に小型電子機器の高周波伝送路に
好適な，外部導体をめっきにより形成させたセミリジッ
ド同軸ケーブルおよ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 coaxial cable and a method of manufacturing the same, and more particularly to a semi-rigid coaxial cable having an outer conductor formed by plating and suitable for a high-frequency transmission line of a small electronic device, and a method of manufacturing the same.
【０００２】[0002]
【従来の技術】近時、携帯電話に代表される民生機器等
の高周波回路基板、高周波部品間の伝送線路としてセミ
リジッド同軸ケーブルが広く採用されるようになり、基
板へのはんだ付け作業に於いても、従来のはんだゴテに
よる手作業から自動化が可能なリフローはんだ付け炉
（以下リフロー炉と略記する）に変わりつつある。2. Description of the Related Art Recently, semi-rigid coaxial cables have been widely used as transmission lines between high-frequency circuit boards and high-frequency components of consumer equipment such as mobile phones, and have been used for soldering to boards. In addition, conventional soldering irons are changing from manual work to reflow soldering furnaces (hereinafter abbreviated as reflow furnaces) that can be automated.
【０００３】従来より公知のセミリジッド同軸ケーブル
としては、銀めっき銅被覆鋼線からなる中心導体の外周
に充実絶縁体、例えばポリテトラフルオロエチレン（Ｐ
ＴＦＥ）をペースト押出しにより形成し、その外周に銅
等の良導電性金属パイプを封入し、ダイスにより引き抜
き加工を施し、絶縁体と密着させて外部導体を形成させ
たセミリジッド同軸ケーブル（以下、パイプ引抜セミリ
ジッド同軸ケーブルと略記する）がある。[0003] Conventionally known semi-rigid coaxial cables include a solid insulator, for example, polytetrafluoroethylene (P), around the center conductor made of silver-plated copper-coated steel wire.
A semi-rigid coaxial cable (hereinafter referred to as a pipe) formed by extruding TFE) by paste extrusion, enclosing a good conductive metal pipe such as copper on the outer periphery thereof, performing drawing with a die, and forming an external conductor in close contact with an insulator. Abbreviated as a drawn semi-rigid coaxial cable).
【０００４】また、前記良導電性金属パイプの引き抜き
加工の代わりに、外部導体をめっきにより形成させたセ
ミリジッド同軸ケーブル（以下、めっき形成セミリジッ
ド同軸ケーブルと略記する）もある。例えば、外部導体
にアンカー金属層からなる無電解めっきと、電気めっき
を併用させた特開平６−１８７８４７号の同軸ケーブル
の製造方法は、電気めっき厚さを容易にコントロールで
き細径化が可能であるため、軽薄・短小化の要求には好
適である。There is also a semi-rigid coaxial cable (hereinafter abbreviated as a plating-formed semi-rigid coaxial cable) in which an outer conductor is formed by plating instead of the drawing of the good conductive metal pipe. For example, the method of manufacturing a coaxial cable disclosed in Japanese Patent Application Laid-Open No. HEI 6-187847, in which electroless plating consisting of an anchor metal layer is used for the outer conductor and electroplating is used, the thickness of the electroplate can be easily controlled and the diameter can be reduced. Therefore, it is suitable for the demand for lightness and shortness.
【０００５】[0005]
【発明が解決しようとする課題】前記パイプ引抜セミリ
ジッド同軸ケーブルは、リフロー炉を通した時、引き抜
き加工で生じた外部導体の歪みや絶縁体へのストレス、
または外部導体と絶縁体との熱膨張の違いにより、端末
部では絶縁体が突き出したり、外部導体にクラックが生
じ易くなり、それにより電圧定在波比の悪化やシールド
効果の低下を招来するという欠点を有している。そのた
め、外部導体厚さを必要以上に厚く（例えば１５０μ
ｍ）することで外部導体のクラックや絶縁体の突き出し
を抑制しており、軽薄・短小化の要求に答えられないと
いう問題があった。The pipe drawn semi-rigid coaxial cable, when passed through a reflow furnace, is subjected to distortion of an outer conductor caused by drawing, stress to an insulator,
Or, due to the difference in thermal expansion between the outer conductor and the insulator, the insulator protrudes at the end, and the outer conductor is liable to crack, which leads to a deterioration of the voltage standing wave ratio and a decrease in the shielding effect. Has disadvantages. Therefore, the thickness of the outer conductor is made unnecessarily thick (for example, 150 μm).
m) suppresses cracks in the outer conductor and protrusion of the insulator, and there is a problem that it is not possible to meet the demand for lightness, thinness, and shortening.
【０００６】一方、前記めっき形成セミリジッド同軸ケ
ーブルに於いては、通常，絶縁体としてフッ素系樹脂の
充実体を用いているので、リフロー炉を通した時、前記
パイプ引抜セミリジッド同軸ケーブル程ではないが、端
末部では絶縁体が突き出したり、外部導体にクラックが
生じてしまうという問題があった。また、絶縁層の最表
面に多孔質体あるいは発泡体がある場合は、めっきによ
る外部導体の形成時、無電解めっき工程に於いてめっき
溶液が絶縁体内部までしみ込むため、アンカー金属層の
形成が困難であるという問題があった。On the other hand, the plated semi-rigid coaxial cable generally uses a solid body of a fluororesin as an insulator, so that when passing through a reflow furnace, it is not as good as the pipe-pulled semi-rigid coaxial cable. In addition, at the terminal portion, there is a problem that the insulator protrudes or a crack occurs in the outer conductor. If a porous or foamed material is present on the outermost surface of the insulating layer, the plating solution penetrates into the insulator during the electroless plating step when forming the outer conductor by plating. There was a problem that it was difficult.
【０００７】本発明は、上記従来技術が有する各種問題
点を解決するためになされたもので、リフロー炉を通し
た時に，端末部での絶縁体の突き出しや外部導体のクラ
ックの発生を防止することができ、めっきによる外部導
体の形成が良好にでき、また細径化が可能なセミリジッ
ド同軸ケーブルおよびその製造方法を提供することを目
的とする。The present invention has been made to solve the above-mentioned various problems of the prior art, and prevents the protrusion of the insulator at the terminal portion and the occurrence of cracks in the outer conductor when passing through a reflow furnace. It is an object of the present invention to provide a semi-rigid coaxial cable capable of forming an outer conductor by plating and having a reduced diameter, and a method of manufacturing the same.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するため
に、第１の観点として本発明は、中心導体の外周に絶縁
体，及びめっきにより形成した外部導体を順次設けてな
る同軸ケーブルであって、前記絶縁体は、該絶縁体の一
部に多孔質体あるいは発泡体を含み、且つ、該絶縁体最
表面が充実体であるフッ素系樹脂絶縁体であり、また該
フッ素系樹脂絶縁体は、充実絶縁層，多孔質あるいは発
泡絶縁層，及び充実絶縁層を順次設けた３層構造の絶縁
体であり、また前記外部導体は無電解めっきにより形成
したアンカー金属層と電気めっきにより形成した良導電
性金属層からなるセミリジッド同軸ケーブルにある。According to a first aspect of the present invention, there is provided a coaxial cable in which an insulator and an outer conductor formed by plating are sequentially provided on the outer periphery of a center conductor. Te, the insulator comprises a porous material or foam on a part of the insulator, and a fluorine-based resin insulation the insulator outermost surface is a solid body, also the
Fluorocarbon resin insulators are made of solid insulating layers, porous
Three-layer insulation with foam insulation layer and solid insulation layer provided sequentially
The outer conductor is a semi-rigid coaxial cable comprising an anchor metal layer formed by electroless plating and a good conductive metal layer formed by electroplating.
【０００９】第２の観点として本発明は、中心導体の外
周にフッソ系樹脂を溶融押出しする溶融押出し工程によ
り充実絶縁層を設け、次にこの充実絶縁層の外周にフッ
素系樹脂の多孔質テープを巻回するテープ巻工程により
多孔質絶縁層を設け、次にこの多孔質絶縁層の外周にフ
ッソ系樹脂を溶融押出しする溶融押出し工程により充実
絶縁層を設けて３層構造の絶縁体とし、次に該絶縁体の
外周に無電解めっき工程によりアンカー金属層を形成し
た後，このアンカー金属層の外周に電気めっき工程によ
り良導電性金属層を形成して外部導体とするセミリジッ
ド同軸ケーブルの製造方法にある。 [0009] As a second aspect, the present invention relates to a method for controlling a position outside a center conductor.
In a melt extrusion process where the fluorine resin is melt-extruded around
A solid insulation layer is provided, and
By the tape winding process of winding porous tape of base resin
A porous insulating layer is provided, and then a porous insulating layer is provided around the porous insulating layer.
Enhancement by melt extrusion process that melt extrudes sso-based resin
An insulating layer is provided to form a three-layer insulator, and then the insulator
An anchor metal layer is formed on the outer periphery by an electroless plating process.
After this, the outer periphery of this anchor metal layer is
A semi-rigid metal
In the method of manufacturing a coaxial cable.
【００１０】第３の観点として本発明は、中心導体の外
周にフッソ系樹脂を溶融押出しする溶融押出し工程によ
り充実絶縁層を設け、次にこの充実絶縁層の外周にフッ
素系樹脂を未焼結ペースト押出しする未焼結ペースト押
出し工程により多孔質絶縁層を設け、次にこの多孔質絶
縁層の外周にフッソ系樹脂を溶融押出しする溶融押出し
工程により充実絶縁層を設けて３ 層構造の絶縁体とし、
次に該絶縁体の外周に無電解めっき工程によりアンカー
金属層を形成した後，このアンカー金属層の外周に電気
めっき工程により良導電性金属層を形成して外部導体と
するセミリジッド同軸ケーブルの製造方法にある。 [0010] As a third aspect, the present invention relates to a method for controlling the presence of
In a melt extrusion process where the fluorine resin is melt-extruded around
A solid insulation layer is provided, and
Unsintered paste pressing to extrude base resin
The porous insulating layer is provided by the
Melt extrusion to melt-extrude a fluorine resin on the outer periphery of the edge layer
A solid insulating layer is provided by a process to form a three- layer insulator,
Next, anchor the outer periphery of the insulator by an electroless plating process.
After forming the metal layer, an electric
Form a good conductive metal layer by plating process and
To manufacture a semi-rigid coaxial cable.
【００１１】第４の観点として本発明は、中心導体の外
周にフッソ系樹脂を溶融押出しする溶融押出し工程によ
り充実絶縁層を設け、次にこの充実絶縁層の外周にフッ
ソ系樹脂を溶融押出しする際、ガスを混入させ発泡させ
る発泡押出し工程により発泡絶縁層を設け、次にこの発
泡絶縁層の外周にフッソ系樹脂を溶融押出しする溶融押
出し工程により充実絶縁層を設けて３層構造の絶縁体と
し、次に該絶縁体の外周に無電解めっき工程によりアン
カー金属層を形成した後，このアンカー金属層の外周に
電気めっき工程により良導電性金属層を形成して外部導
体とするセミリジッド同軸ケーブルの製造方法にある。 [0011] As a fourth aspect, the present invention relates to a method for controlling a position outside a center conductor.
In a melt extrusion process where the fluorine resin is melt-extruded around
A solid insulation layer is provided, and
When melt-extruding so-based resin, gas is mixed and foamed
The foamed insulating layer is provided by a foaming extrusion process.
Melt extrusion to melt-extrude a fluorine resin on the outer periphery of the foam insulation layer
A solid insulating layer is provided by the outgoing process to form a three-layered insulator.
Then, the outer periphery of the insulator is removed by an electroless plating process.
After forming the car metal layer, the outer periphery of this anchor metal layer
Form a good conductive metal layer by electroplating
The present invention relates to a method for manufacturing a semi-rigid coaxial cable as a body.
【００１２】本発明の中心導体としては、銀めっき銅被
覆鋼線、銀めっき軟銅線、銀めっき銅合金線、銀めっき
撚線等を使用することができる。また、本発明のフッ素
系樹脂としては、ポリテトラフルオロエチレン（ＰＴＦ
Ｅ）、四フッ化エチレン−パーフロロアルキルビニルエ
ーテル共重合体（ＰＦＡ）、テトラフルオロエチレン−
ヘキサフルオロプロピレン共重合体（ＥＴＦＥ）等の何
れかを使用することができる。 The center conductor of the present invention is a silver-plated copper coating.
Insulated steel wire, silver plated soft copper wire, silver plated copper alloy wire, silver plated
A stranded wire or the like can be used. Further, the fluorine of the present invention
Polytetrafluoroethylene (PTF)
E), ethylene tetrafluoride-perfluoroalkyl vinyl ester
-Ter copolymer (PFA), tetrafluoroethylene-
What is hexafluoropropylene copolymer (ETFE)
You can use it .
【００１３】[0013]
【作用】本発明の第１の観点のセミリジッド同軸ケーブ
ルは、絶縁体の一部に多孔質体あるいは発泡体を含み、
且つ、該絶縁体最表面が充実体であるフッ素系樹脂絶縁
体であり、また該フッ素系樹脂絶縁体は、充実絶縁層，
多孔質あるいは発泡絶縁層，及び充実絶縁層を順次設け
た３層構造の絶縁体としているので、はんだ付け作業時
の熱による膨張が緩和され、外部導体のクラックが抑制
される。また、絶縁体最表面が充実体であることで、め
っき溶液の絶縁体内部へのしみ込みが回避できるので、
無電解めっきによりアンカー金属層が良好に形成され、
更に該アンカー金属層の外周に電気めっきによって良導
電性金属層を所望の厚さに形成できる。従って、めっき
により外部導体を設けたセミリジッド同軸ケーブルの細
径化、例えば中心導体の外径が０．０５ｍｍ以上，０．
２０ｍｍ以下であり、同軸ケーブルの仕上外径が０．９
ｍｍ以下、が可能となり、軽薄・短小化にも好適とな
る。更に、中心導体の外周に充実絶縁層を設けたこと
で、中心導体−絶縁体間の密着が、中心導体の外周に多
孔質あるいは発泡絶縁層を設けた同軸ケーブルよりも優
れ、且つ、同軸処理機での端末ストリップ加工において
もカット刃が食い込み易く、加工面で優位である。 The semi-rigid coaxial cable according to the first aspect of the present invention
ル includes a porous body or foam as part of the insulator,
And a fluorine-based resin insulation in which the outermost surface of the insulator is a solid body
The fluororesin insulator is a solid insulating layer,
Provide a porous or foamed insulating layer and a solid insulating layer sequentially
Because it is a three-layer insulator,
Expansion due to heat is reduced, and cracks in the outer conductor are suppressed
Is done. Also, because the outermost surface of the insulator is solid,
So that the solution can be prevented from seeping into the insulator.
Anchor metal layer is well formed by electroless plating,
Furthermore, the outer periphery of the anchor metal layer is leaded by electroplating.
The conductive metal layer can be formed to a desired thickness. Therefore, plating
Of a semi-rigid coaxial cable with an outer conductor
Diameter, for example, the outer diameter of the center conductor is 0.05 mm or more;
20 mm or less, and the finished outer diameter of the coaxial cable is 0.9
mm or less, making it suitable for light weight and short size.
You. In addition, a solid insulating layer is provided around the center conductor.
The contact between the center conductor and the insulator
Superior to coaxial cables with porous or foamed insulation layers
And in terminal strip processing with a coaxial processor
Also, the cutting blade is easy to cut into, and is superior in processing.
【００１４】本発明の第２の観点のセミリジッド同軸ケ
ーブルの製造方法は、中心導体の外周にフッ素系樹脂を
溶融押し出しすることで充実絶縁層が形成でき、次いで
この外周にフッ素系樹脂の多孔質テープを巻回すること
で、多孔質絶縁層が形成でき、次いでこの外周にフッ素
系樹脂を溶融押出しすることで充実絶縁層を形成でき、
絶縁体の一部に多孔質体あるいは発泡体を含み、且つ絶
縁体の最表面が充実体である３層構造の絶縁体が容易に
形成できる。従って、めっき溶液の絶縁体内部へのしみ
込みが回避でき、無電解めっきによりアンカー金属層が
良好に形成される。更に電気めっきによって前記アンカ
ー金属層の外周に良導電性金属層を所望の径に形成でき
る。従って、めっきにより外部導体を設けたセミリジッ
ド同軸ケーブルの細径化が可能となり、軽薄・短小化に
も好適となる。 A semi-rigid coaxial cable according to a second aspect of the present invention
The cable manufacturing method is to use a fluororesin around the center conductor.
A solid insulating layer can be formed by melt extrusion, and then
Wrap a fluororesin porous tape around this circumference
Thus, a porous insulating layer can be formed.
A solid insulating layer can be formed by melt-extruding the base resin,
A part of the insulator contains a porous or foamed material, and
Insulators with a three-layer structure in which the outermost surface of the edge body is solid
Can be formed. Therefore, the plating solution seeps into the insulator.
The anchor metal layer by electroless plating.
Well formed. The anchor is further electroplated.
-A good conductive metal layer can be formed around the metal layer to a desired diameter.
You. Therefore, semi-rigid with an external conductor provided by plating
Cable coaxial cable can be made thinner and lighter, thinner and shorter.
Is also suitable.
【００１５】本発明の第３の観点のセミリジッド同軸ケ
ーブルの製造方法は、中心導体の外周にフッ素系樹脂を
溶融押し出しすることで充実絶縁層が形成でき、次いで
この外周にフッ素系樹脂を未焼結ペースト押出しするこ
とで多孔質絶縁層が形成でき、次いでこの外周にフッ素
系樹脂を溶融押出しすることで充実絶縁層が形成でき、
絶縁体の一部に多孔質体あるいは発泡体を含み、且つ絶
縁体の最表面が充実体である３層構造の絶縁体が容易に
形成できる。従って、前記第２の観点のセミリジッド同
軸ケーブルの製造方法と同様の作用が良好に得られる。 A semi-rigid coaxial cable according to a third aspect of the present invention
The cable manufacturing method is to use a fluororesin around the center conductor.
A solid insulating layer can be formed by melt extrusion, and then
A non-sintered paste of fluororesin is extruded around this periphery.
And a porous insulating layer can be formed.
A solid insulating layer can be formed by melt-extruding the base resin,
A part of the insulator contains a porous or foamed material, and
Insulators with a three-layer structure in which the outermost surface of the edge body is solid
Can be formed. Accordingly, the semi-rigid of the second aspect
The same operation as in the method of manufacturing the shaft cable can be obtained favorably.
【００１６】本発明の第４の観点のセミリジッド同軸ケ
ーブルの製造方法は、中心導体の外周にフッ素系樹脂を
溶融押し出しすることで充実絶縁層が形成でき、次いで
この外周にフッ素系樹脂を溶融押し出しする際，フッ素
あるいは窒素などのガスを混入させることで発泡絶縁層
が形成でき、次いでこの外周にフッ素系樹脂を溶融押出
しすることで充実絶縁層が形成でき、絶縁体の一部に多
孔質体あるいは発泡体を含み、且つ絶縁体の最表面が充
実体である３層構造の絶縁体が容易に形成できる。従っ
て、前記第２の観点のセミリジッド同軸ケーブルの製造
方法と同様の作用が良好に得られる。 A semi-rigid coaxial cable according to a fourth aspect of the present invention
The cable manufacturing method is to use a fluororesin around the center conductor.
A solid insulating layer can be formed by melt extrusion, and then
When extruding a fluorine-based resin around this periphery,
Alternatively, a foam insulating layer can be formed by mixing a gas such as nitrogen.
Can be formed, and then melt-extrude a fluororesin
By doing so, a solid insulating layer can be formed,
Contains porous or foamed material and the outermost surface of the insulator is full
An insulator having a real three-layer structure can be easily formed. Follow
Manufacturing a semi-rigid coaxial cable according to the second aspect.
The same effect as in the method can be obtained well.
【００１７】[0017]
【実施例】以下に本発明の実施例を図を用いて詳細に説
明する。なお、外部導体の形成方法は本発明者等の発明
である特開平６−１８７８４７号に準拠している。図１
は実施例１〜３の説明に用いる，本発明の３層構造の絶
縁体を設けたセミリジッド同軸ケーブルの一実施例を示
す断面図である。この図において、１は中心導体、２は
絶縁体、２ａは多孔質または発泡絶縁層、２ｂ，２ｂ’
は充実絶縁層、３は外部導体、３ａはアンカー金属層、
３ｂは良導電性金属層、また５はセミリジッド同軸ケー
ブルである。 DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings.
I will tell. The method for forming the outer conductor is the same as that of the present inventors.
No. 6-187847. FIG.
Is the absolute value of the three-layer structure of the present invention used in the description of Examples 1 to 3.
An example of a semi-rigid coaxial cable provided with an edge is shown.
FIG. In this figure, 1 is the center conductor, 2 is
Insulator, 2a is a porous or foamed insulating layer, 2b, 2b '
Is a solid insulating layer, 3 is an outer conductor, 3a is an anchor metal layer,
3b is a good conductive metal layer, and 5 is a semi-rigid coaxial cable.
Bull.
【００１８】実施例１ 中心導体１として、φ０．２００ｍｍの銀めっき銅被覆
鋼線を用い、この外周にＰＦＡを溶融押出しによって２
０μｍ厚さに施しφ０．２４ｍｍの充実絶縁層２ｂを設
けた。続いて厚さ５５μｍ，幅４ｍｍの多孔質ＰＴＦＥ
テープを２／３ラップ重ね巻きすることによって、約３
倍厚さの１６０μｍの多孔質絶縁層２ａを設け、φ０．
５６ｍｍとした。次いでこの外周にＰＦＡを溶融押出し
によって２５μｍ厚さに施した充実絶縁層２ｂ’を設
け、φ０．６１ｍｍの３層構造を有した絶縁体２を形成
した。続いて外部導体３として、無電解ニッケルめっき
によって１μｍ厚さのアンカー金属層３ａを設けた後、
硫酸銅めっきによって良導電性金属層３ｂとしての銅層
を１００μｍ厚さまで設け、仕上がり径０．８１０ｍｍ
のセミリジッド同軸ケーブル５を製造した。 EXAMPLE 1 Silver plated copper coating of φ0.200 mm as center conductor 1
Using a steel wire, PFA is melt-extruded around the
0μm thickness and a solid insulating layer 2b of φ0.24mm is provided.
I did. Successively, porous PTFE having a thickness of 55 μm and a width of 4 mm
Approximately 3
A porous insulating layer 2a having a thickness of 160 μm and having a double thickness is provided.
It was 56 mm. Next, PFA is melt-extruded around this periphery.
To provide a solid insulating layer 2b 'having a thickness of 25 μm.
To form an insulator 2 having a three-layer structure of φ0.61 mm
did. Subsequently, as the external conductor 3, electroless nickel plating
After the anchor metal layer 3a having a thickness of 1 μm is provided by
Copper layer as good conductive metal layer 3b by copper sulfate plating
Is provided up to a thickness of 100 μm, and the finished diameter is 0.810 mm
Was manufactured.
【００１９】実施例２ 中心導体１として、φ 0.05mm × 7 本の銀めっき撚り線を
用い、この外周にＰＦＡを溶融押出しによって施しφ
０．２４ｍｍの充実絶縁層２ｂを設けた。次にこの外周
にＦＥＰをペースト押出しし、最終仕上げで焼結させず
多孔質とし、１６０μｍ厚さの多孔質絶縁層２ａを設
け、φ０．５６ｍｍとした。次いでこの外周にＦＥＰを
溶融押出しによって２５μｍ厚さに施した充実絶縁層２
ｂ’を設け、φ０．６１ｍｍの３層構造を有した絶縁体
２を形成した。続いて外部導体３として、無電解ニッケ
ルめっきによって１μｍ厚さのアンカー金属層３ａを設
けた後、硫酸銅めっきによって良導電性金属層３ｂとし
ての銅層を５０μｍ厚さまで設け、仕上がり径０．７１
０ｍｍのセミリジッド同軸ケーブル５を製造した。 Example 2 As the center conductor 1, a φ0.05 mm × 7 silver-plated stranded wire was used.
PFA is applied to the outer periphery by melt extrusion.
The solid insulating layer 2b of 0.24 mm was provided. Next, this outer circumference
Extrusion of FEP into paste, without sintering in the final finish
A porous insulating layer 2a having a thickness of 160 μm;
And φ0.56 mm. Next, FEP
Solid insulation layer 2 applied to a thickness of 25 μm by melt extrusion
An insulator having a three-layer structure of φ0.61 mm provided with b ′
2 was formed. Then, as the outer conductor 3, an electroless nickel
An anchor metal layer 3a having a thickness of 1 μm is formed by plating.
After the soldering, a good conductive metal layer 3b is formed by copper sulfate plating.
Copper layer to a thickness of 50 μm and a finished diameter of 0.71
A 0-mm semi-rigid coaxial cable 5 was manufactured.
【００２０】実施例３ 中心導体１として、φ 0.05mm × 7 本の銀めっき撚り線を
用い、この外周にＰＦＡを溶融押出しによって施しφ
０．２４ｍｍの充実絶縁層２ｂを設けた。続いて、ＰＦ
Ａの溶融押出しの際に、窒素ガスを混入させ１６０μｍ
厚さの発泡絶縁層２ａを設け、φ０．５６ｍｍとした。
次いでこの外周にＰＦＡを溶融押出しによって２５μｍ
厚さに施した充実絶縁層２ｂ’を設け、φ０．６１ｍｍ
の３層構造を有した絶縁体２を形成した。続いて外部導
体３として、無電解ニッケルめっきによって１μｍ厚さ
のアンカー金属層３ａを設けた後、硫酸銅めっきによっ
て良導電性金属層３ｂとしての銅層を５０μｍ厚さまで
設け、仕上がり径０．７１０ｍｍのセミリジッド同軸ケ
ーブル５を製造した。 Example 3 As the center conductor 1, φ0.05 mm × 7 silver-plated stranded wires were used.
PFA is applied to the outer periphery by melt extrusion.
The solid insulating layer 2b of 0.24 mm was provided. Then, PF
At the time of melt extrusion of A, mix nitrogen gas
A foam insulating layer 2a having a thickness of 0.56 mm was provided.
Next, PFA was melt-extruded on the outer periphery by 25 μm.
Provide a solid insulating layer 2b 'applied to the thickness, φ0.61mm
The insulator 2 having the three-layer structure was formed. Next,
Body 1 is 1 μm thick by electroless nickel plating
After the anchor metal layer 3a is formed,
Copper layer as a good conductive metal layer 3b to a thickness of 50 μm
Semi-rigid coaxial cable with a finished diameter of 0.710mm
Table 5 was produced.
【００２１】比較例 比較例について、図２を用いて説明する。 比較例１ 中心導体１として、φ０．２００ｍｍの銀めっき銅被覆
鋼線を用い、この外周にＰＴＦＥを溶融押出しによって
２３０μｍ厚さに施しφ０．６６ｍｍの充実絶縁体２’
を形成した。続いてこの外周に外部導体３として、無電
解ニッケルめっきによって１μｍ厚さのアンカー金属層
３ａを設けた後、硫酸銅めっきによって良導電性金属層
３ｂとしての銅層を１００μｍ厚さまで設け、仕上がり
径０．８６ｍｍのセミリジッド同軸ケーブル５’を製造
した。 Comparative Example A comparative example will be described with reference to FIG. Comparative Example 1 Silver plated copper coating of φ0.200 mm as center conductor 1
Using a steel wire, PTFE is melt-extruded around this periphery
Solid insulator 2 'with a thickness of 230 μm and φ0.66 mm
Was formed. Then, an outer conductor 3 is
1μm thick anchor metal layer by nickel plating
After providing 3a, a conductive metal layer is formed by copper sulfate plating.
Finished with copper layer as 3b up to 100μm thick
Manufacture of semi-rigid coaxial cable 5 'with a diameter of 0.86mm
did.
【００２２】特性試験 上記実施例および比較例により得られたセミリジッド同
軸ケーブルについて、７５ｍｍ長の試料を採取し、リフ
ロー炉によってはんだ付けを行った時の外部導体へのク
ラック数、絶縁体の突き出し長さについて試験した。そ
の結果を下記表１に示す。なお、リフロー作業条件は、
２５０℃，ベルトスピード０．７５ｍ／ｍｉｎで行っ
た。 Characteristic test The semi-rigid specimens obtained in the above Examples and Comparative Examples
Take a 75 mm length sample of the shaft cable and
When soldering with a low furnace,
The test was performed on the number of racks and the protrusion length of the insulator. So
Table 1 shows the results. The reflow operation conditions are
Performed at 250 ° C and belt speed 0.75m / min
Was.
【００２３】[0023]
【表１】 [Table 1]
【００２４】[0024]
【発明の効果】本発明により得られたセミリジッド同軸
ケーブルは、絶縁体の一部に多孔質体あるいは発泡体を
含むことで、はんだ付け作業時の熱による膨張が緩和さ
れ外部導体のクラックの発生を抑制できるばかりでな
く、端末加工した絶縁体の突き出しが無くなり、電圧定
在波比や減衰量等の伝送特性が阻害されなくなった。ま
た絶縁体の最表面が充実体であることから、めっき溶液
がしみ込まず、無電解めっきによりアンカー金属層が良
好に形成でき、続いて電気めっきにより所望の径に良導
電性金属層が形成できるため細径化が可能となり、軽薄
・短小化にも好適となる。更に、中心導体の外周に充実
絶縁層を設けたことで、中心導体−絶縁体間の密着が、
中心導体の外周に多孔質あるいは発泡絶縁層を設けた同
軸ケーブルよりも優れ、且つ、同軸処理機での端末スト
リップ加工においてもカット刃が食い込み易く、加工面
で優位となる。従って、民生機器等の高周波回路基板、
高周波部品に利用されるセミリジッド同軸ケーブルとし
て極めて有用であり、産業上に寄与する効果は極めて大
である。 The semi-rigid coaxial obtained by the present invention
Cables are made of a porous or foam material that is part of the insulation.
Including, reduces thermal expansion during soldering
Not only can suppress the occurrence of cracks in the outer conductor.
In addition, the terminal-processed insulator no longer protrudes,
Transmission characteristics such as wave ratio and attenuation are no longer hindered. Ma
Since the outermost surface of the insulator is solid, the plating solution
Good anchor metal layer by electroless plating without penetrating
It can be formed well, then lead to the desired diameter by electroplating
Since the conductive metal layer can be formed, the diameter can be reduced,
-It is also suitable for shortening. In addition, enhanced on the outer circumference of the center conductor
By providing the insulating layer, the adhesion between the center conductor and the insulator,
A porous or foamed insulation layer is provided around the center conductor.
Better than a shaft cable, and a
Even in lip processing, the cutting blade is easy to bite, and the processing surface
To take advantage. Therefore, high-frequency circuit boards such as consumer equipment,
Semi-rigid coaxial cable used for high-frequency components
Is extremely useful, and the effect on the industry is extremely large.
It is.
【図１】 本発明の３層構造の絶縁体を設けたセミリジ
ッド同軸ケーブルの一実施例を示す断面図である。FIG. 1 is a sectional view showing an embodiment of a semi-rigid coaxial cable provided with an insulator having a three-layer structure according to the present invention.
【図２】 従来の充実絶縁体を設けたセミリジッド同軸
ケーブルを示す断面図である。 [Fig. 2] Conventional semi-rigid coaxial with solid insulator
It is sectional drawing which shows a cable.
１ 中心導体 ２ 絶縁体 ２ａ 多孔質または発泡絶縁層 ２ｂ，２ｂ’ 充実絶縁層 ３ 外部導体 ３ａ アンカー金属層 ３ｂ 良導電性金属層 ５ セミリジッド同軸ケーブル 1 center conductor 2 insulator 2a Porous or foamed insulating layer 2b, 2b 'Solid insulating layer 3 outer conductor 3a anchor metal layer 3b Good conductive metal layer 5 Semi-rigid coaxial cable
───────────────────────────────────────────────────── フロントページの続き (72)発明者 山口 正 長野県上田市大字大屋300番地 東京特 殊電線株式会社 上田工場内 (56)参考文献 特開 平６−187847（ＪＰ，Ａ) 実開 昭59−65422（ＪＰ，Ｕ) 実開 昭63−141517（ＪＰ，Ｕ) 実開 昭58−154515（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) H01B 11/18 ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Tadashi Yamaguchi 300 Oya, Ueda-shi, Nagano Prefecture, Tokyo Special Electric Cable Co., Ltd. Ueda Plant (56) References JP-A-6-187847 (JP, A) 59-65422 (JP, U) Fully open 63-141517 (JP, U) Fully open 58-154515 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) H01B 11/18
Claims (4)
より形成した外部導体を順次設けてなる同軸ケーブルで
あって、 前記絶縁体は、該絶縁体の一部に多孔質体あるいは発泡
体を含み、且つ、該絶縁体最表面が充実体であるフッ素
系樹脂絶縁体であり、また該フッ素系樹脂絶縁体は、充
実絶縁層，多孔質あるいは発泡絶縁層，及び充実絶縁層
を順次設けた３層構造の絶縁体であり、また前記外部導
体は無電解めっきにより形成したアンカー金属層と電気
めっきにより形成した良導電性金属層からなることを特
徴とするセミリジッド同軸ケーブル。1. A coaxial cable in which an insulator and an outer conductor formed by plating are sequentially provided on an outer periphery of a center conductor, wherein the insulator comprises a porous body or a foam body as a part of the insulator. And a fluorine-based resin insulator whose outermost surface is a solid body, and wherein the fluorine-based resin insulator is
Real insulating layer, porous or foamed insulating layer, and solid insulating layer
Successively an insulator having a three-layer structure in which, also the outer conductor semi-rigid coaxial cable, characterized in that composed of highly-conductive metal layer formed by the anchor metal layer and electroplated formed by electroless plating.
出しする溶融押出し工程により充実絶縁層を設け、次に
この充実絶縁層の外周にフッ素系樹脂の多孔質テープを
巻回するテープ巻工程により多孔質絶縁層を設け、次に
この多孔質絶縁層の外周にフッソ系樹脂を溶融押出しす
る溶融押出し工程により充実絶縁層を設けて３層構造の
絶縁体とし、次に該絶縁体の外周に無電解めっき工程に
よりアンカー金属層を形成した後，このアンカー金属層
の外周に電気めっき工程により良導電性金属層を形成し
て外部導体とすることを特徴とするセミリジッド同軸ケ
ーブルの製造方法。 2. A method in which a fluorine resin is melt-pressed on the outer periphery of the center conductor.
Provide a solid insulating layer by the melt extrusion process
A porous tape of fluororesin is applied to the outer periphery of this solid insulation layer.
Provide a porous insulating layer by a tape winding step of winding, then
Melt and extrude a fluorine resin on the outer periphery of this porous insulating layer.
A solid insulation layer is provided by a melt extrusion process
An insulator, and then the outer periphery of the insulator is subjected to an electroless plating process
After forming the anchor metal layer, the anchor metal layer
A good conductive metal layer by electroplating process
Semi-rigid coaxial cable characterized in that
Table manufacturing method.
出しする溶融押出し工程により充実絶縁層を設け、次に
この充実絶縁層の外周にフッ素系樹脂を未焼結ペースト
押出しする未焼結ペースト押出し工程により多孔質絶縁
層を設け、次にこの多孔質絶縁層の外周にフッソ系樹脂
を溶融押出しする溶融押出し工程により充実絶縁層を設
けて３層構造の絶縁体とし、次に該絶縁体の外周に無電
解めっき工程によりアンカー金属層を形成した後，この
アンカー金属層の外周に電気めっき工程により良導電性
金属層を形成して外部導体とすることを特徴とするセミ
リジッド同軸ケーブルの製造方法。 3. A method in which a fluorine resin is melt-pressed on the outer periphery of the center conductor.
Provide a solid insulating layer by the melt extrusion process
Unsintered paste of fluororesin on the outer periphery of this solid insulation layer
Porous insulation by extruding green paste extruding process
Layer, and then a fluorine resin on the outer periphery of the porous insulating layer.
Solid insulation layer is provided by melt extrusion process
To form a three-layered insulator,
After forming the anchor metal layer by the deplating process,
Good conductivity by electroplating process on the outer periphery of anchor metal layer
A semi-conductor characterized by forming a metal layer to serve as an external conductor
Manufacturing method of rigid coaxial cable.
出しする溶融押出し工程により充実絶縁層を設け、次に
この充実絶縁層の外周にフッソ系樹脂を溶融押出しする
際、ガスを混入させ発泡させる発泡押出し工程により発
泡絶縁層を設け、次にこの発泡絶縁層の外周にフッソ系
樹脂を溶融押出しする溶融押出し工程により充実絶縁層
を設けて３層構造の絶縁体とし、次に該絶縁体の外周に
無電解めっき工程によりアンカー金属層を形成した後，
このアンカー金属層の外周に電気めっき工程により良導
電性金属層を形成して外部導体とすることを特徴とする
セミリジッド同軸ケーブルの製造方法。 4. A fluorinated resin is melt-pressed on the outer periphery of the center conductor.
Provide a solid insulating layer by the melt extrusion process
Melt extrude a fluororesin around the outer periphery of this solid insulation layer
At the time of foaming extrusion process in which gas is mixed and foamed
A foam insulation layer is provided, and then a fluorine-based
Solid insulation layer by melt extrusion process that melt extrudes resin
To form an insulator having a three-layer structure, and then on the outer periphery of the insulator.
After forming the anchor metal layer by the electroless plating process,
Good conductivity by electroplating process on the outer periphery of this anchor metal layer
Characterized by forming an electrically conductive metal layer to be an external conductor
Manufacturing method of semi-rigid coaxial cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10266997A JP3537288B2 (en) | 1997-04-03 | 1997-04-03 | Semi-rigid coaxial cable and method of manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10266997A JP3537288B2 (en) | 1997-04-03 | 1997-04-03 | Semi-rigid coaxial cable and method of manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10283853A JPH10283853A (en) | 1998-10-23 |
| JP3537288B2 true JP3537288B2 (en) | 2004-06-14 |
Family
ID=14333647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10266997A Expired - Fee Related JP3537288B2 (en) | 1997-04-03 | 1997-04-03 | Semi-rigid coaxial cable and method of manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3537288B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4544815B2 (en) * | 2001-12-19 | 2010-09-15 | 宇部日東化成株式会社 | Small coaxial cable |
| WO2004013870A1 (en) * | 2002-08-06 | 2004-02-12 | Ube-Nitto Kasei Co., Ltd. | Thin-diameter coaxial cable and method of producing the same |
| JP4507655B2 (en) * | 2004-03-18 | 2010-07-21 | 東京特殊電線株式会社 | High performance semi-rigid coaxial cable and coaxial cable assembly |
| KR100842985B1 (en) * | 2006-07-21 | 2008-07-01 | 엘에스전선 주식회사 | Micro Coaxial cable |
| JP5239304B2 (en) * | 2007-11-14 | 2013-07-17 | 日立電線株式会社 | Coaxial cable and manufacturing method thereof |
| JPWO2010064579A1 (en) * | 2008-12-02 | 2012-05-10 | 株式会社フジクラ | Transmission cable and signal transmission cable using the same |
-
1997
- 1997-04-03 JP JP10266997A patent/JP3537288B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10283853A (en) | 1998-10-23 |
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