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JP3997449B2 - Etching method and etching apparatus - Google Patents
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JP3997449B2 - Etching method and etching apparatus - Google Patents

Etching method and etching apparatus Download PDF

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Publication number
JP3997449B2
JP3997449B2 JP01683898A JP1683898A JP3997449B2 JP 3997449 B2 JP3997449 B2 JP 3997449B2 JP 01683898 A JP01683898 A JP 01683898A JP 1683898 A JP1683898 A JP 1683898A JP 3997449 B2 JP3997449 B2 JP 3997449B2
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Japan
Prior art keywords
etching
jig
substrate
connecting rod
shower
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Expired - Fee Related
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JP01683898A
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Japanese (ja)
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JPH11217684A (en
Inventor
進 直之
善幸 池添
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Resonac Corp
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Hitachi Chemical Co Ltd
Showa Denko Materials Co Ltd
Resonac Corp
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Description

【0001】
【発明の属する技術分野】
本発明は、金属を表面に施した基板または金属板のエッチング方法及びエッチング装置に関する。
【0002】
【従来の技術】
従来、エッチング装置のシャワー揺動方式は、一般的に被エッチング基板の搬送方向に直角に水平揺動あるいは首振りなどの方法で行っている。
【0003】
【発明が解決しようとする課題】
従来の水平揺動あるいは首振りなどによるエッチング方法においては、ライン幅が60μm程度の細線パターンとなると搬送方向とその直角方向では約10μmのライン幅の差が生じるなど、均一なライン幅を得ることが困難であった。この課題に対して、シャワーの揺動を被エッチング基板の搬送方向および直角方向とで組み合わせ、薬液の噴射を各方向に振り分けて均一なライン幅を得ようとする装置が登場しているが、それぞれの方向に対する薬液噴射量の決定など条件設定が困難である等の欠点があった。
本発明は、金属を表面に施した基板または金属板のエッチングにおいて、ライン幅が60μm程度の微細なパターンでも縦方向や横方向などの方向によらず均一なエッチングが可能なエッチング方法やエッチング装置を提供することを課題とした。
【0004】
【課題を解決するための手段】
本発明は、金属を表面に施した基板または金属板を搬送し、金属を薬液のシャワーによりエッチングする装置において、シャワー管を被エッチング板と平行に長軸、短軸を可動可能な楕円運動させ、長軸が搬送方向となるようにエッチングするエッチング方法である
【0005】
さらに本発明は、金属を表面に施した基板または金属板を搬送し、金属を薬液のシャワーによりエッチングする装置において、回転軸に設けられた治具Aに直線状の孔を有し、この孔に治具Bと治具Aを連結させる連結棒の一端に設けたベアリングを係止させ、該連結棒の他端に設けたベアリングを治具Bに設けたドーナツ状の楕円孔に係止させ、さらに該連結棒にシャワー管に連結するシャフトを係止させ、回転軸を回転させることにより治具Aの直線状の孔と治具Bの楕円孔により連結棒に設けたシャワー管に連結するシャフトを長軸が搬送方向となるように楕円運動するようにしたエッチング装置である。
【0006】
【発明の実施の形態】
本発明は、シャワー管を被エッチング板と平行に長軸、短軸を可変可能な楕円運動を行い、均一なライン幅を得るための条件設定を容易にし、ライン幅の管理精度を向上しようとするものである。
【0007】
金属を表面に施した基板は、代表的には金属張り積層板や内層回路に絶縁層を設けて表面に金属箔を配した多層配線板であり、不要な金属をエッチングにより除去するためはんだなどの金属レジストや有機レジストなどのエッチングレジストが形成されている。金属板は、代表的にはリードフレームなどであり、同様に不要な金属をエッチングにより除去するためエッチングレジストが形成されている。これらエッチングレジストが形成された基板や金属板は、エッチング装置により塩化第二鉄溶液、塩化第二銅溶液、アルカリエッチング液、酸溶液、アルカリ溶液などの薬液をシャワー配管に設けた複数個の薬液ノズルにより薬液をシャワーしてエッチングする。エッチング装置には、搬送コンベアが設けられ、このコンベアにより基板や金属板の被エッチング基板がエッチング液を受け、エッチングされつつ搬送される。シャワー配管は、被エッチング基板の両面に設け上面と下面を同時にエッチングすることもできる。シャワー配管に設ける薬液ノズルは、被エッチング基板と薬液ノズルの距離、薬液の圧力などにより異なるが、一つの薬液ノズルから被エッチング基板面に噴射される薬液が一部重なる程度の間隔とする。そしてシャワー配管とシャワー配管の間隔は、薬液ノズルの間隔と同様、薬液が一部重なる程度の間隔とし、一つのシャワー配管と隣接するシャワー配管の薬液ノズルは、薬液ノズルと薬液ノズルの中間に位置するようにするのがエッチング液が均一に噴射され均一なライン幅を得るうえで好ましい。
【0008】
本発明のエッチング方法は、シャワー管を被エッチング基板と平行に長軸、短軸を可動可能な楕円運動させてエッチングするものである。こうすることにより、従来のシャワー揺動方式や首振り方式に較べ、被エッチング基板にエッチング液が常に流動するように接触して流れ、従来の主として揺動方向や首振り方向の一方向のエッチング液の流れに対し、滞留のないエッチング液の流れを形成し、被エッチング基板の縦方向や横方向のエッチングが均一に行われるようになる。すなわち、被エッチング基板が搬送され薬液ノズルから基板搬送方向と同じ方向、それと直角方向や斜め方向にエッチング液が噴射されエッチング液が被エッチング基板面のあらゆる方向に流動するようになり、エッチングが方向によらず均一化される。
【0009】
楕円運動の長軸は、搬送方向とした方がエッチング液噴射の方向性がなくエッチングが均一に行われるので好ましい。被エッチング基板が静止した場合を考えると円運動を描くようにエッチング液を噴射するとエッチング液噴射の方向性がなくエッチングが方向によらず均一に行われると考えられる。ところが、被エッチング基板は、搬送コンベアにより搬送方向に移動するため円運動をさせた場合では、搬送方向と直角方向に長軸が、搬送方向に短軸が有るような楕円運動させた場合に相当し、搬送方向と直角方向のエッチング液の流れが多くなり、その方向のエッチングが多くなり、それと直角の搬送方向のエッチングが相対的に少なくなり方向性がでてしまう。但し、従来の揺動方式や首振り方式に比較して、エッチング液の流れがより一層均一化されておりエッチングの方向性が顕著に改善される。従って、搬送方向に楕円運動の長軸を配し、搬送方向と直角方向に短軸を配するようにするのが好ましい。より好ましくは、楕円運動の長軸を次のようにして求めた値にすることが好ましい。楕円運動の一周期の間に搬送される距離に短軸を加えた値を長軸の値とすることで、見かけ上、円運動するようにエッチング液が噴射され、被エッチング基板にエッチング液が方向性がなく均一に噴射されるようになりエッチングが方向によらず均一に行われるようになる。長軸をa(cm)、短軸をb(cm)、楕円運動の周期をT(秒)、搬送速度をV(m/分)とすると式(1)の関係になる。
【0010】
【数1】
a=b+(5/3)×V×T …式(1)
a:長軸(cm) 、b:短軸(cm) 、V:搬送速度(m/分)
T:楕円運動の周期(秒)
【0011】
例えば、短軸を20mmとし搬送速度が0.6m/分で、楕円運動の周期が2秒(30回転/分)の場合、a=2+(5/3)×0.6×2=4となり、長軸aを40mmとする。このようにすることにより、搬送コンベアにより搬送されている被エッチング基板に薬液ノズルから噴射されるエッチング液の軌跡は円運動に近いものになり被エッチング基板のエッチング液の流動はマクロ的に方向性がなく縦方向や横方向のエッチングがより均一に行われるようになる。
【0012】
本発明のエッチング装置は、シャワー管に楕円運動を行わせるようにしたもので、同時にシャワー管に配した複数個の薬液ノズルやそこから噴射されるエッチング液も同様に楕円運動を行う。このシャワー管に楕円運動を行わせる装置は、直線状の孔を有した治具A、ドーナツ状の楕円孔を有した治具B、連結棒、治具Aに設けた回転軸から主として構成される。連結棒は、ベアリングを2個有し、更に楕円運動をシャワー管に伝えるシャフトが回動自在に結合され、治具Aから治具Bへ回転力を伝達する。
【0013】
本発明のエッチング装置のシャワー管に楕円運動を行わせる機構を図1に基づいて説明する。図1(a)は平面図であり、図1(b)は断面図を示す。長軸、短軸が調整可能な楕円軌道をシャワー管に付与する機構として直線状の孔(1)を有する治具A(2)を回転軸(3)に設置し、実現しようとする楕円軌道の楕円孔(8)を有する治具B(4)を設備側に固定する。そして、治具Aと治具Bを連結するための連結棒(6)に、シャワー管に接続したシャフト(5)の先端を回動自在に接続し、さらに、連結棒の一端と他端にそれぞれベアリング(7)、(7)を設け治具Aの直線状の孔(1)と治具Bの楕円孔(8)の孔にはめ込む。
治具Aは、直線状の孔(1)を有し、その孔に連結棒に設けたベアリング(7)をはめ込みこのベアリングを介して連結棒が直線状の運動となるように規制される。孔の大きさはベアリングの外形とほぼ同等とし長さは、楕円運動の長軸の長さに合わせるか楕円運動の長軸、短軸の変更に対応できるようにそれより大きくする方が好ましい。直線状の孔は強度、耐薬品性を満足するよう被覆金属、プラスチックなどの板に設け、図1に示すようにこの板を支える支持部材を介して回転軸を取り付けた板に固定しても良い。治具Aは、回転軸を介して回転が治具Aに伝えられ直線状の孔に設けたベアリングを通して連結棒が直線状の運動をする。
【0014】
治具Bは、ドーナツ状の楕円孔(8)を有し、その孔に連結棒に設けたベアリング(7)をはめ込みこのベアリングを介して連結棒が楕円運動となるように規制される。ドーナツ状の楕円孔は強度、耐薬品性を満足するよう被覆金属、プラスチックなどの板に設け、図1に示すように楕円孔に囲まれた楕円を固定するため支持部材を介して別の板に固定しても良い。楕円孔の周辺の部分も支持部材を介して前記の別の板に固定する。治具Bは装置に固定され、治具Aから連結棒を介して伝えられる力は、連結棒に設けたベアリングにより治具Bの楕円孔に伝えられ楕円孔に沿って楕円運動する。治具Bは、装置に固定されているので連結棒は治具Bに沿って楕円運動し、これに伴い連結棒に結合されている治具Aも直線状の孔に規制されつつ楕円運動を行う。そのため楕円運動の動力を伝える回転軸はその端がフレキシブルホース、ワイヤーなどで変速機付きモータに連結されている。
【0015】
連結棒には、シャワー管に接続したシャフト(5)の先端が回動自在に接続されており、シャフトの他端は、例えば、シャワー管が基板の搬送方向に直角の方向に10列設けられ固定された支持板に回動自在に設けられる。シャワー管が固定された支持板は、その四辺角部にプラスチックで被覆したバネやゴムなどを介して支持され、楕円運動の抵抗を減少させることが好ましい。支持板が大きいときや楕円運動の周期が短いときは、楕円運動させる抵抗が大きいので治具A,Bなどで構成される装置を連動させ複数個設けることが好ましい。
【0016】
治具Bの楕円孔は、その長軸と短軸が種々異なる板材を予め準備しておき、所望の長軸と短軸の楕円孔を有する板材のみを支持部材を介して前記の別の板に固定することにより楕円運動の軌跡を種々変えることができる。
【0017】
【実施例】
以下、本発明を実施例により具体的に説明する。
(実施例)
シャワー管が基板の搬送方向に直角の方向に10cm間隔で10列設け支持板に固定した。シャワー管には薬液ノズルが10cm間隔で7個、その隣接するシャワー管には、6個設けた。このシャワー管が固定された支持板にシャフトの一端を回動自在に取り付け、シャフトのもう一つの他端をベアリングで連結棒に結合した。そして、図1に示すように、治具Aの直線状の孔に連結棒の端に予め嵌合したベアリングをはめ込み、さらに連結棒の他端に予め嵌合したベアリングを治具Bの楕円孔にはめ込んだ。直線状の孔、楕円孔を設けた板は、厚み5mmのステンレス板を用い、孔あけ加工を施してからポリテトラフルオロエチレン樹脂で被覆加工したものを用いた。シャワー管を取り付けた支持板は、その四角をポリテトラフルオロエチレン樹脂で被覆したバネによりつり下げ、薬液ノズルと被エッチング基板の距離が150mmとなるようにした。これらを2式基板搬送方向に並べた。
被エッチング基板として、厚み18μmの銅箔を片面に用いた基板厚み0.8mmの片面銅張積層板を用い、この銅箔面に厚み25μmの感光性ドライフィルム(フォテックHK425;日立化成工業株式会社製商品名)をラミネートし、幅60μmで格子状にパターを描いたネガフィルムで露光、現像してエッチングレジストを形成した。
基板搬送速度1.5m/分、楕円回転数50回転/分(周期;1.2秒/回転)、シャワー圧力2.0Kg/cm2の条件でエッチングした。
楕円運動の短軸を基板搬送方向と直角方向とし、長軸を基板搬送方向とした。短軸を3cmとし、長軸を3cm、6cm、9cmとしてエッチングしたときの基板搬送方向とその直角方向のライン幅の差を被エッチング基板面積を25等分して測定しその平均で求めた。その結果を表1に示す。
【0018】
【表1】

Figure 0003997449
【0019】
(比較例)
実施例において、シャワー配管、薬液ノズル、被エッチング基板と薬液ノズルの高さを同じにし、基板搬送方向にのみ7cm揺動させた。エッチングしたときの基板搬送方向とその直角方向のライン幅の差を実施例と同様にして測定した結果、10μm(搬送方向のライン幅が小さい)であった。
【0020】
【発明の効果】
本発明によるエッチング方法及びエッチング装置を用いてエッチングすることにより、基板の搬送方向と直角方向で均一にエッチングされ、エッチング時のライン幅の差の少ないパターンを形成することができる。これにより、機器の小型、軽量化による配線の高密度化を達成することに貢献することができる。
【図面の簡単な説明】
【図1】本発明のエッチング装置の要部を示す構成図であり、(a)は平面図を,(b)は断面図である。
【符号の説明】
1.直線状の孔
2.治具A
3.回転軸
4.治具B
5.シャフト
6.連結棒
7.ベアリング
8.楕円孔[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an etching method and an etching apparatus for a substrate or metal plate having a metal surface.
[0002]
[Prior art]
Conventionally, the shower swing method of an etching apparatus is generally performed by a method such as horizontal swing or swinging at a right angle to the transport direction of the substrate to be etched.
[0003]
[Problems to be solved by the invention]
In the conventional etching method by horizontal swing or swinging, a uniform line width is obtained, for example, when a thin line pattern having a line width of about 60 μm has a difference of about 10 μm in the conveyance direction and a direction perpendicular thereto. It was difficult. In response to this problem, an apparatus has appeared that combines swinging of the shower in the direction of transport of the substrate to be etched and the direction perpendicular to it, and distributes the spray of the chemical solution in each direction to obtain a uniform line width. There are drawbacks such as difficult condition setting, such as determination of the amount of chemical injection for each direction.
The present invention relates to an etching method and an etching apparatus capable of uniformly etching a fine pattern having a line width of about 60 μm regardless of a vertical direction or a horizontal direction in etching a substrate or a metal plate having a metal surface. It was an issue to provide.
[0004]
[Means for Solving the Problems]
The present invention relates to an apparatus that transports a substrate or metal plate with metal on its surface and etches the metal by chemical liquid shower, and an elliptical motion that can move the long axis and short axis of the shower tube parallel to the surface of the plate to be etched. The etching method is such that the long axis is in the transport direction .
[0005]
Furthermore, the present invention has a linear hole in a jig A provided on a rotating shaft in an apparatus for conveying a substrate or a metal plate coated with metal on the surface and etching the metal by a chemical shower. The bearing provided at one end of the connecting rod for connecting the jig B and the jig A is locked, and the bearing provided at the other end of the connecting rod is locked in the donut-shaped elliptical hole provided in the jig B. Further, the shaft connected to the shower tube is locked to the connecting rod, and the rotating shaft is rotated to connect to the shower tube provided on the connecting rod by the linear hole of the jig A and the elliptical hole of the jig B. This is an etching apparatus in which the shaft is elliptically moved so that the major axis is in the transport direction .
[0006]
DETAILED DESCRIPTION OF THE INVENTION
The present invention attempts to improve the control accuracy of the line width by performing elliptical motion in which the major axis and minor axis can be changed in parallel with the plate to be etched, making it easy to set conditions for obtaining a uniform line width. To do.
[0007]
Substrates with metal on the surface are typically metal-clad laminates and multilayer wiring boards with an inner layer circuit with an insulating layer and metal foil on the surface. Solder etc. to remove unnecessary metal by etching Etching resists such as metal resists and organic resists are formed. The metal plate is typically a lead frame or the like, and similarly, an etching resist is formed to remove unnecessary metal by etching. A substrate or metal plate on which these etching resists are formed has a plurality of chemical solutions in which chemical solutions such as ferric chloride solution, cupric chloride solution, alkaline etching solution, acid solution, and alkaline solution are provided in the shower pipe by an etching apparatus. Show chemicals with a nozzle and etch. The etching apparatus is provided with a conveyance conveyor, and the substrate or the substrate to be etched, such as a metal plate, receives the etching solution and is conveyed while being etched. The shower pipe can be provided on both surfaces of the substrate to be etched, and the upper surface and the lower surface can be etched simultaneously. The chemical nozzle provided in the shower pipe varies depending on the distance between the substrate to be etched and the chemical nozzle, the pressure of the chemical, and the like, but the interval is such that the chemical injected from one chemical nozzle to the etched substrate surface partially overlaps. The interval between the shower pipe and the shower pipe is the same as the distance between the chemical nozzles, so that the chemical liquids partially overlap, and the chemical nozzle of the shower pipe adjacent to one shower pipe is located between the chemical nozzle and the chemical nozzle. It is preferable that the etching solution is uniformly sprayed to obtain a uniform line width.
[0008]
In the etching method of the present invention, the shower tube is etched by moving the major axis and minor axis in an elliptical motion in parallel with the substrate to be etched. By doing so, compared to the conventional shower swing method and swing method, the etchant always flows in contact with the substrate to be etched so that the etching solution always flows. An etching solution flow without stagnation is formed with respect to the solution flow, and the etching of the substrate to be etched in the vertical and horizontal directions is performed uniformly. That is, the substrate to be etched is transported, and the etching liquid is jetted from the chemical nozzle in the same direction as the substrate transport direction, in a direction perpendicular to it or in an oblique direction, and the etching liquid flows in all directions on the surface of the substrate to be etched. It is made uniform regardless.
[0009]
The major axis of the elliptical motion is preferably set in the transport direction because etching is not performed and etching is performed uniformly. Considering the case where the substrate to be etched is stationary, it is considered that when the etching solution is sprayed so as to draw a circular motion, the etching solution is not directed and etching is performed uniformly regardless of the direction. However, when the substrate to be etched is moved in the transfer direction by the transfer conveyor and moved circularly, it corresponds to the case where the substrate is moved in an elliptical manner in which the major axis is perpendicular to the transfer direction and the minor axis is in the transfer direction. However, the flow of the etching solution in the direction perpendicular to the transport direction increases, the etching in that direction increases, and the etching in the transport direction perpendicular to the transport direction relatively decreases, resulting in directivity. However, the flow of the etching solution is made more uniform and the etching direction is remarkably improved as compared with the conventional swing method and swing method. Therefore, it is preferable to arrange the major axis of the elliptical motion in the conveying direction and the minor axis in the direction perpendicular to the conveying direction. More preferably, the major axis of the elliptical motion is set to a value obtained as follows. The value obtained by adding the minor axis to the distance conveyed during one cycle of the elliptical motion is taken as the value of the major axis, so that the etchant is sprayed so as to appear to be circularly moving, and the etchant is applied to the substrate to be etched. There is no directionality and the spray is uniformly performed, and the etching is performed uniformly regardless of the direction. When the major axis is a (cm), the minor axis is b (cm), the elliptical motion period is T (seconds), and the conveying speed is V (m / min), the relationship of Equation (1) is established.
[0010]
[Expression 1]
a = b + (5/3) × V × T (1)
a: long axis (cm), b: short axis (cm), V: transport speed (m / min)
T: Period of elliptic motion (seconds)
[0011]
For example, when the minor axis is 20 mm, the conveyance speed is 0.6 m / min, and the period of the elliptical motion is 2 seconds (30 rotations / min), a = 2 + (5/3) × 0.6 × 2 = 4 The major axis a is 40 mm. By doing so, the locus of the etching liquid sprayed from the chemical nozzle on the substrate to be etched being conveyed by the conveyor is close to a circular motion, and the flow of the etching liquid on the substrate to be etched is macroscopically directional. Therefore, the etching in the vertical direction and the horizontal direction can be performed more uniformly.
[0012]
The etching apparatus of the present invention is configured to cause the shower tube to perform an elliptical motion, and at the same time, a plurality of chemical nozzles arranged in the shower tube and the etching liquid sprayed therefrom also perform the elliptical motion. The apparatus for causing the shower tube to perform an elliptical motion mainly includes a jig A having a linear hole, a jig B having a donut-shaped elliptical hole, a connecting rod, and a rotating shaft provided in the jig A. The The connecting rod has two bearings, and a shaft for transmitting the elliptical motion to the shower tube is rotatably coupled to transmit the rotational force from the jig A to the jig B.
[0013]
A mechanism for causing the shower tube of the etching apparatus of the present invention to perform an elliptical motion will be described with reference to FIG. 1A is a plan view, and FIG. 1B is a cross-sectional view. An elliptical orbit to be realized by installing a jig A (2) having a linear hole (1) on the rotating shaft (3) as a mechanism for providing an elliptical orbit with adjustable long and short axes to the shower tube. The jig B (4) having the elliptical hole (8) is fixed to the equipment side. Then, the tip of the shaft (5) connected to the shower tube is rotatably connected to the connecting rod (6) for connecting the jig A and the jig B, and is further connected to one end and the other end of the connecting rod. Bearings (7) and (7) are provided and fitted into the holes of the linear hole (1) of the jig A and the elliptical hole (8) of the jig B, respectively.
The jig A has a straight hole (1), and a bearing (7) provided on the connecting rod is fitted into the hole, and the connecting rod is regulated through this bearing so as to have a linear motion. The size of the hole is preferably substantially the same as the outer shape of the bearing, and the length is preferably adjusted to match the length of the major axis of the elliptical motion or larger to accommodate the change of the major and minor axes of the elliptical motion. The straight hole is provided in a plate made of coated metal, plastic or the like so as to satisfy the strength and chemical resistance, and as shown in FIG. 1, it is fixed to the plate to which the rotary shaft is attached via a support member that supports this plate. good. In the jig A, the rotation is transmitted to the jig A through the rotation shaft, and the connecting rod moves linearly through the bearing provided in the linear hole.
[0014]
The jig B has a donut-like elliptical hole (8), and a bearing (7) provided on the connecting rod is fitted into the hole, and the connecting rod is regulated to have an elliptical motion through the bearing. The donut-shaped elliptical hole is provided on a plate made of a coated metal, plastic or the like so as to satisfy strength and chemical resistance, and another plate is interposed via a support member to fix the ellipse surrounded by the elliptical hole as shown in FIG. It may be fixed to. The peripheral portion of the elliptical hole is also fixed to the other plate via the support member. The jig B is fixed to the apparatus, and the force transmitted from the jig A through the connecting rod is transmitted to the elliptic hole of the jig B by a bearing provided on the connecting rod and moves elliptically along the elliptic hole. Since the jig B is fixed to the apparatus, the connecting rod elliptically moves along the jig B, and accordingly, the jig A coupled to the connecting rod also moves elliptically while being restricted by the linear hole. Do. Therefore, the end of the rotating shaft that transmits the power of the elliptical motion is connected to a motor with a transmission by a flexible hose, a wire, or the like.
[0015]
The end of the shaft (5) connected to the shower tube is rotatably connected to the connecting rod. For example, the other end of the shaft is provided with 10 rows of shower tubes in a direction perpendicular to the substrate transport direction. A fixed support plate is rotatably provided. The support plate to which the shower tube is fixed is preferably supported via a spring or rubber covered with plastic at its four corners to reduce the resistance of elliptical motion. When the support plate is large or when the elliptical motion cycle is short, the resistance to the elliptical motion is large, so it is preferable to provide a plurality of devices composed of jigs A, B, etc. in conjunction with each other.
[0016]
As for the elliptical hole of the jig B, plate materials having different major axes and minor axes are prepared in advance, and only the plate material having the desired major axis and minor axis elliptical holes is placed on the other plate via the support member. The locus of the elliptical motion can be changed variously by fixing to.
[0017]
【Example】
Hereinafter, the present invention will be specifically described by way of examples.
(Example)
Ten rows of shower tubes were provided at intervals of 10 cm in a direction perpendicular to the substrate transport direction and fixed to the support plate. The shower tube was provided with 7 chemical nozzles at 10 cm intervals, and 6 adjacent shower tubes. One end of the shaft was rotatably attached to the support plate to which the shower tube was fixed, and the other end of the shaft was connected to the connecting rod by a bearing. Then, as shown in FIG. 1, a bearing pre-fitted to the end of the connecting rod is fitted into the linear hole of the jig A, and the bearing pre-fitted to the other end of the connecting rod is inserted into the elliptical hole of the jig B. Inset. As the plate provided with the straight holes and the elliptical holes, a stainless steel plate having a thickness of 5 mm was used, and after being drilled, coated with polytetrafluoroethylene resin was used. The support plate to which the shower tube was attached was suspended by a spring whose squares were covered with polytetrafluoroethylene resin so that the distance between the chemical nozzle and the substrate to be etched was 150 mm. These were arranged in the type 2 substrate transport direction.
As a substrate to be etched, a single-sided copper-clad laminate having a thickness of 18 mm and a copper foil having a thickness of 18 μm on one side was used. Product name) was laminated and exposed and developed with a negative film having a width of 60 μm and a pattern in a lattice shape to form an etching resist.
Etching was performed under the conditions of a substrate transfer speed of 1.5 m / min, an elliptical rotation speed of 50 rotations / minute (period: 1.2 seconds / rotation), and a shower pressure of 2.0 kg / cm 2 .
The minor axis of the elliptical motion was the direction perpendicular to the substrate transport direction, and the long axis was the substrate transport direction. The difference in line width between the substrate transport direction and the direction perpendicular to the substrate when the minor axis is 3 cm and the major axis is 3 cm, 6 cm, and 9 cm is measured by dividing the substrate area to be etched into 25 equal parts, and the average is obtained. The results are shown in Table 1.
[0018]
[Table 1]
Figure 0003997449
[0019]
(Comparative example)
In the example, the height of the shower pipe, the chemical solution nozzle, the substrate to be etched, and the chemical solution nozzle were the same, and was swung 7 cm only in the substrate transport direction. The difference between the line width in the substrate transport direction and the direction perpendicular to the substrate when etched was measured in the same manner as in the example, and as a result, it was 10 μm (the line width in the transport direction was small).
[0020]
【The invention's effect】
By etching using the etching method and the etching apparatus according to the present invention, it is possible to form a pattern that is uniformly etched in a direction perpendicular to the substrate transport direction and has a small difference in line width during etching. Thereby, it can contribute to achieving the high density of wiring by size reduction and weight reduction of an apparatus.
[Brief description of the drawings]
FIGS. 1A and 1B are configuration diagrams showing a main part of an etching apparatus according to the present invention, wherein FIG. 1A is a plan view and FIG. 1B is a cross-sectional view.
[Explanation of symbols]
1. Straight hole 2. Jig A
3. Rotating shaft 4. Jig B
5). Shaft 6. Connecting rod 7. Bearing 8. Elliptical hole

Claims (2)

金属を表面に施した基板または金属板を搬送し、金属を薬液のシャワーによりエッチングする装置において、シャワー管を被エッチング板と平行に長軸、短軸を可動可能な楕円運動させ、長軸が搬送方向となるようにエッチングすることを特徴とするエッチング方法。In an apparatus that transports a substrate or metal plate with metal on its surface and etches the metal by chemical solution shower, the long axis and the short axis are moved in an elliptical motion so that the long axis and the short axis can be moved parallel to the surface of the etched plate. Etching method characterized in that etching is performed so as to be in the transport direction. 金属を表面に施した基板または金属板を搬送し、金属を薬液のシャワーによりエッチングする装置において、回転軸に設けられた治具Aに直線状の孔を有し、この孔に治具Bと治具Aを連結させる連結棒の一端に設けたベアリングを係止させ、該連結棒の他端に設けたベアリングを治具Bに設けたドーナツ状の楕円孔に係止させ、さらに該連結棒にシャワー管に連結するシャフトを係止させ、回転軸を回転させることにより治具Aの直線状の孔と治具Bの楕円孔により連結棒に設けたシャワー管に連結するシャフトを長軸が搬送方向となるように楕円運動するようにしたエッチング装置。In an apparatus for transporting a substrate or a metal plate having a metal surface and etching the metal by a chemical shower, the jig A provided on the rotating shaft has a straight hole, and the jig B A bearing provided at one end of a connecting rod for connecting the jig A is locked, a bearing provided at the other end of the connecting rod is locked in a donut-shaped elliptical hole provided in the jig B, and the connecting rod The long shaft is connected to the shower tube provided on the connecting rod by the linear hole of the jig A and the elliptic hole of the jig B by locking the shaft connected to the shower tube and rotating the rotating shaft. An etching apparatus that moves elliptically so as to be in the transport direction .
JP01683898A 1998-01-29 1998-01-29 Etching method and etching apparatus Expired - Fee Related JP3997449B2 (en)

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CN111472003B (en) * 2020-05-27 2022-09-20 湖北兴福电子材料股份有限公司 Etching solution for adjusting etching cone angle in copper process panel and adjusting method
EP4032870A1 (en) * 2021-01-22 2022-07-27 Heraeus Deutschland GmbH & Co. KG Structured metal / ceramic substrate and method for structuring metal-ceramic substrates
CN113645766B (en) * 2021-07-23 2022-08-02 鸿安(福建)机械有限公司 Etching device for PCB
CN113981446B (en) * 2021-11-25 2024-01-19 江苏佰元鸿金属科技有限公司 Process and device for flat plate etching
CN116709655B (en) * 2023-07-31 2023-11-07 深圳玛斯兰电路科技实业发展有限公司 A high-frequency and high-speed PCB board processing equipment

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