JP3815267B2 - Masking agent application method and apparatus, and mask method and apparatus - Google Patents

Masking agent application method and apparatus, and mask method and apparatus Download PDF

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Publication number
JP3815267B2
JP3815267B2 JP2001196903A JP2001196903A JP3815267B2 JP 3815267 B2 JP3815267 B2 JP 3815267B2 JP 2001196903 A JP2001196903 A JP 2001196903A JP 2001196903 A JP2001196903 A JP 2001196903A JP 3815267 B2 JP3815267 B2 JP 3815267B2
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Prior art keywords
flat plate
plate member
masking agent
coating
gap
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JP2001196903A
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JP2003010763A (en
Inventor
修二 竹田
真介 伊藤
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Denso Corp
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Denso Corp
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  • Coating Apparatus (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Non-Metallic Protective Coatings For Printed Circuits (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、プリント基板等に防湿用マスキング剤を塗布する場合に不はんだ付部にマスキング剤が付着することが防止できるマスキング剤の塗布方法及びマスク装置に関する。
【０００２】
【従来の技術】
一般にプリント基板等は、回路の導体間の隙間にコーティング（マスキング）をすることによって、基板の絶縁保護を計っている。
従来のプリント基板等へのマスキング剤の塗布方法は、図５に（ａ）スプレー式ノズル、（ｂ）ドット式ノズルで示されるように、塗布部と非塗布部との間に充分な距離があったため、ノズルによりマスキング剤をプリント基板等の塗布部に吐出塗布していた。
しかし、プリント基板上の回路が密になり、マスキング剤の塗布部と非塗布部との距離が狭くなってくると、塗布部に吐出塗布したマスキング剤の飛沫が、非塗布部に付着し、（後工程の）付着の影響による強度不足及び汚れの原因になるという問題があった。
【０００３】
【発明が解決しようとする課題】
本発明は、上記問題に鑑みてなされたもので、その目的は、回路が密になり、マスキング剤の塗布部と非塗布部との距離が狭くなっても、非塗布部にマスキング剤が付着することを確実に防止するマスキング剤塗布方法とその装置、及びマスク方法とその装置を提供することである。
【０００４】
本発明は、前記課題を解決するための手段として、特許請求の範囲の各請求項に記載のマスキング剤塗布方法とその装置及びマスク方法とその装置を提供する。
請求項１に記載のマスキング剤塗布方法は、平板状部材の表面に対向して平坦に形成されている、と共に、外周縁に突起が形成されている、吐出口を含む塗布装置の先端面を、突起を平板状部材の表面に接触させることによって、平板状部材の塗布面をカバーし、平板状部材の表面との間に毛管作用を起すような所定の隙間を形成するように配置し、この隙間に吐出口からのマスキング剤を注入するようにしたものである。これにより、注入された液状のマスキング剤は毛管作用により塗布装置でカバーされた平板状部材の塗布面に確実に塗布されると共に、非塗布面にマスキング剤が飛沫等によって付着することを防止できる。また、塗布装置と塗布面との隙間を簡単に所定の隙間にすることができ、マスキング剤の注入量を制御することで、塗布面への確実な塗布、並びに非塗布面へのはみ出しが防止できる。
【０００５】
請求項２のマスキング剤塗布装置は、請求項１の方法の発明を物の発明である装置発明にそれぞれ置き換えたものであり、その作用効果は、方法の発明と同様である。
【０００６】
請求項３に記載のマスク方法は、マスク装置で平板状部材の非塗布面をカバーすると共に、このマスク装置の平板状部材と対面する面の外周縁に形成された突出部が、平板状部材表面との間に毛管作用を起すような間隙以下に保持された状態で、マスキング剤が平板状部材の塗布面に注入されるようにしたものであり、これにより、マスク装置と平板状部材間に飛んだマスキング剤の飛沫は毛管作用により、この突出部と平板状部材との間に浸入し、マスキング剤を液溜することでマスキング剤が非塗布面に付着することを確実に防止できる。
請求項４のマスク装置は、請求項３の方法の発明を物の発明である装置発明に書き換えたものであり、その作用効果は、前記方法の発明とほぼ同様である。
【０００７】
【発明の実施の形態】
以下、図面に従って本発明の実施の形態のマスキング剤塗布方法及びその装置並びにマスク方法とその装置について説明する。図１は、本発明の第１実施形態のマスキング塗布装置の概略構成図である。プリント基板等の平板状部材３の表面に液状のマスキング剤を塗布する塗布装置１には、その略中央部を貫設する形でマスキング剤を吐出する吐出口２が設けられている。塗布装置１の平板状部材３と対向する先端面１ａは、平板状部材３の塗布面３ａをカバーする形で平坦に形成されており、マスキング剤を塗布面３ａに塗布する際には、塗布装置１の先端面１ａと平板状部材３の塗布面３ａとの間で、マスキング剤が毛管作用を起すような隙間ｄになるように、塗布装置１が配置されるようになっている。なお、符号３ｂは、平板状部材３のマスキング剤の非塗布面である。また、マスキング剤は、例えば、エポキシ系又はポリウレタン系の樹脂が用いられ、公知の供給機構により供給される。
【０００８】
上記の構成の本発明のマスキング剤塗布装置の作動について説明する。
まず、プリント基板等の平板状部材３を所定位置に位置決め保持する。次に塗布装置１で平板状部材３のマスキング剤の塗布面３ａをカバーする。このとき、塗布装置１の先端面１ａと平板状部材３の表面との間の隙間ｄは、液状のマスキング剤が毛管作用を起すような、例えば、約０．１〜０．５mm、の間隔に保持される。次いで、塗布装置１の吐出口２からこの隙間ｄにマスキング剤が吐出される。吐出されたマスキング剤は、塗布装置１の先端面１ａと平板状部材３の塗布面３ａとで形成された隙間ｄ内を、毛管作用により隅々まで行き渡り、マスキング剤により塗布面３ａが塗布厚さｈで塗布される。このとき、マスキング剤の注入量を制御することで、マスキング剤は隙間ｄ内に保持される形になるので、マスキング剤が平板状部材３の非塗布面３ｂにその表面張力により行き渡るのを防止できる。なお、塗布厚さｈは、ほぼ隙間ｄに等しい。
【０００９】
図２は、本発明の第２実施形態のマスキング剤塗布装置の部分拡大図である。この実施形態では、平板状部材３の塗布面３ａと対向する塗布装置１の先端面１ａの外周縁に、平板状部材３の表面に向って突出する突起１ｂが形成されている。この突起１ｂの高さは、上記した隙間ｄと同じ長さに形成されている。したがって、突起１ｂを平板状部材３の表面に接触して配置することで、塗布装置１の先端面１ａと平板状部材３の表面との間で隙間ｄが安定して得られ、マスキング剤の塗布範囲、厚みが安定するようになる。また、突起１ｂがマスキング剤の塗布面３ａから非塗布面３ｂへのはみ出しを、一層効果的に防止している。
【００１０】
図３は、本発明の第３実施形態のマスク装置の概略構成図である。このマスク装置４は、プリント基板等の平板状部材３の非塗布面３ｂをカバーするために設けられるものである。マスク装置４の平板状部材３の表面と対向する先端部４ａには、その外周縁に平板状部材３の表面に向って突出する突出部４ｂが形成されている。マスク装置４が平板状部材３の非塗布面３ｂをカバーするように位置付けされるとき、この突出部４ｂの端面と平板状部材３の表面との間隙ｄ′は、マスキング剤が毛管作用を起すような間隙以下、例えば、約０．５mm以下になるように、マスク装置４は平板状部材３の表面上に配置されるように構成されている。当然、突出部４ｂの厚さ（幅）は、毛管作用を起すに必要な厚さを有しているものである。この場合、図示されない塗布装置により平板状部材３の塗布面３ａに供給されたマスキング剤は、マスク装置４の突出部４ｂと平板状部材３の表面とで形成される隙間によって、非塗布面３ｂへ行くのを阻止される。即ち、マスキング剤は、毛管作用により隙間内に溜まり、その表面張力で隙間から非塗布面３ｂへ行くのを阻止される。なお、マスク装置４の突出部４ｂを平板状部材３の表面に当接するように配置してもよい。
【００１１】
上記の構成のマスク装置の作動について説明する。
まず、プリント基板等の平板状部材３を所定位置に位置決め保持する。次に、マスク装置４で平板状部材３の非塗布面３ｂをカバーする。このとき、マスク装置４の突出部４ｂと平板状部材３の表面との間に形成される隙間ｄ′が約０．５mm以下になるように、マスク装置４を平板状部材３上に保持する。次いで、図示されていない塗布装置により、平板状部材３の塗布面３ａ上にマスキング剤を供給して、塗布面３ａを塗布する。このマスキング剤の塗布時に飛沫として飛んだマスキング剤は、マスク装置４とその突出部４ｂによって非塗布面３ｂに付着することが阻止される。特に、突出部４ｂと平板状部材３の表面との間に飛び込んだマスキング剤は、突出部４ｂと平板状部材３の表面との間にできた隙間ｄ′に毛管作用により浸入し、そこに表面張力によって保持され液溜め状態になっているために、非塗布面３ｂに付着することが確実に防止できる。
【００１２】
図５は、マスキング塗布が行われる平板状部材３の好適な例であるプリント基板３の斜視図である。３ａは塗布面を、３ｂは非塗布面を示している。
【００１３】
以上説明したように、本発明のマスキング剤塗布方法及びその装置では、平板状部材の表面との間に毛管作用を起すような所定の隙間を設けて、塗布面を塗布装置でカバーし、塗布面と塗布装置の隙間に液状のマスキング剤を注入すること、及び塗布装置に突起を設けて、この突起を平板状部材表面に接触させることにより、プリント基板のような平板状部材において、回路が密になり、マスキング剤の塗布面と非塗布面の距離が狭くなっても、非塗布部にマスキング剤が付着することを確実に防止することができる。
同様に本発明のマスク方法及びその装置では、マスク装置の先端面の外周縁に所定厚さ（幅）の突出部を設け、突出部と平板状部材表面との隙間を所定寸法以下に保持するようにしたことにより、プリント基板のような平板状部材において、回路が密になり、マスキング剤の塗布面と非塗布面との距離が狭くなっても、マスキング剤の塗布時に、マスキング剤が非塗布面に付着することを確実に防止することができる。
【図面の簡単な説明】
【図１】本発明の第１実施形態のマスキング剤塗布装置の概略構成図である。
【図２】本発明の第２実施形態のマスキング剤塗布装置の部分拡大図である。
【図３】本発明の第３実施形態のマスク装置の概略構成図である。
【図４】本発明のマスク装置の作用を説明する図である。
【図５】マスキング塗布が行われる平板状部材の好適な例であるプリント基板の斜視図である。
【図６】従来の、（ａ）スプレー式ノズルと（ｂ）ドット式ノズルの塗布装置である。
【符号の説明】
１…（マスキング剤）塗布装置
１ａ…先端面
１ｂ…突起
２…吐出口
３…平板状部材（プリント基板）
３ａ…塗布面
３ｂ…非塗布面
４…マスク装置
４ａ…先端部
４ｂ…突出部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a masking agent coating method and a mask apparatus capable of preventing a masking agent from adhering to a non-soldered portion when a moisture-proof masking agent is applied to a printed circuit board or the like.
[0002]
[Prior art]
In general, a printed circuit board or the like measures insulation of a substrate by coating (masking) a gap between conductors of a circuit.
As shown in Fig. 5 (a) spray type nozzle and (b) dot type nozzle, there is a sufficient distance between the coating part and the non-coating part. Therefore, the masking agent was discharged and applied to the application part such as a printed circuit board by the nozzle.
However, when the circuit on the printed circuit board becomes dense and the distance between the masking agent application part and the non-application part becomes narrow, the droplets of the masking agent applied to the application part adhere to the non-application part. There was a problem of insufficient strength and contamination due to the influence of adhesion (in the post-process).
[0003]
[Problems to be solved by the invention]
The present invention has been made in view of the above problems, and its purpose is that the masking agent adheres to the non-coated portion even if the circuit becomes dense and the distance between the coated portion and the non-coated portion of the masking agent becomes narrow. It is to provide a masking agent coating method and apparatus, and a mask method and apparatus that reliably prevent this.
[0004]
The present invention provides, as means for solving the above-mentioned problems, a masking agent coating method, an apparatus thereof, a mask method, and an apparatus thereof according to the claims.
The masking agent coating method according to claim 1 is configured such that the front end surface of the coating apparatus including the discharge port is formed flat so as to face the surface of the flat plate-like member and has a protrusion formed on the outer peripheral edge. , by contacting the surface of the plate-like member a protrusion, covering the coated surface of the plate-shaped member, and arranged to form a predetermined clearance, such as cause capillary action between the surface of the plate-like member, A masking agent from the discharge port is injected into this gap. As a result, the injected liquid masking agent is surely applied to the application surface of the flat plate member covered by the application device by capillary action, and the masking agent can be prevented from adhering to the non-application surface due to droplets or the like. . In addition, the gap between the coating device and the coating surface can be easily set to a predetermined gap, and by controlling the injection amount of the masking agent, reliable application to the coating surface and protrusion to the non-coating surface can be prevented. it can.
[0005]
The masking agent coating apparatus according to claim 2 is obtained by replacing the invention of the method of claim 1 with the apparatus invention which is an invention of the product, and the operation effect is the same as that of the invention of the method.
[0006]
The mask method according to claim 3 , wherein the mask device covers the non-coated surface of the flat plate member, and the protrusion formed on the outer peripheral edge of the surface facing the flat plate member of the mask device is a flat plate member. The masking agent is injected into the coating surface of the flat plate member in a state where it is kept below the gap that causes capillary action with the surface. The droplets of the masking agent that have spilled into the surface penetrate between the projecting portion and the flat plate member by capillary action, and the masking agent can be prevented from adhering to the non-coated surface by collecting the masking agent.
The mask device of claim 4 is obtained by rewriting the invention of the method of claim 3 into a device invention which is a product invention, and the operation effect thereof is substantially the same as that of the invention of the method.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a masking agent coating method and apparatus and a mask method and apparatus according to embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of a masking coating apparatus according to a first embodiment of the present invention. A coating apparatus 1 that applies a liquid masking agent to the surface of a flat plate member 3 such as a printed circuit board is provided with a discharge port 2 that discharges the masking agent so as to penetrate substantially the center. The tip surface 1a facing the flat plate member 3 of the coating apparatus 1 is formed flat so as to cover the coating surface 3a of the flat plate member 3, and when applying the masking agent to the coating surface 3a, the coating surface 3a is coated. The applicator 1 is arranged so that a gap d between the front end surface 1a of the apparatus 1 and the application surface 3a of the flat plate member 3 causes a capillary action of the masking agent. In addition, the code | symbol 3b is a non-application surface of the masking agent of the flat member 3. FIG. The masking agent is, for example, an epoxy-based or polyurethane-based resin, and is supplied by a known supply mechanism.
[0008]
The operation of the masking agent coating apparatus of the present invention having the above configuration will be described.
First, the flat plate member 3 such as a printed board is positioned and held at a predetermined position. Next, the coating device 3 covers the coating surface 3 a of the masking agent of the flat plate member 3. At this time, the gap d between the tip surface 1a of the coating device 1 and the surface of the flat plate member 3 is, for example, about 0.1 to 0.5 mm at which the liquid masking agent causes capillary action. Retained. Next, a masking agent is discharged from the discharge port 2 of the coating apparatus 1 into the gap d. The discharged masking agent spreads through the gap d formed by the tip surface 1a of the coating device 1 and the coating surface 3a of the flat plate member 3 by capillary action, and the coating surface 3a is coated by the masking agent. It is applied at h. At this time, since the masking agent is held in the gap d by controlling the injection amount of the masking agent, the masking agent is prevented from spreading to the non-coated surface 3b of the flat plate member 3 due to its surface tension. it can. The coating thickness h is substantially equal to the gap d.
[0009]
FIG. 2 is a partially enlarged view of a masking agent coating apparatus according to a second embodiment of the present invention. In this embodiment, a protrusion 1 b that protrudes toward the surface of the flat plate member 3 is formed on the outer peripheral edge of the tip surface 1 a of the coating apparatus 1 that faces the coating surface 3 a of the flat plate member 3. The height of the protrusion 1b is the same length as the gap d described above. Therefore, by arranging the protrusion 1b in contact with the surface of the flat plate member 3, a gap d is stably obtained between the tip surface 1a of the coating apparatus 1 and the surface of the flat plate member 3, and the masking agent The application range and thickness become stable. Further, the protrusion 1b more effectively prevents the masking agent from protruding from the application surface 3a to the non-application surface 3b.
[0010]
FIG. 3 is a schematic configuration diagram of a mask apparatus according to a third embodiment of the present invention. The mask device 4 is provided to cover the non-application surface 3b of the flat plate member 3 such as a printed circuit board. A protrusion 4 b that protrudes toward the surface of the flat plate member 3 is formed on the outer peripheral edge of the tip portion 4 a that faces the surface of the flat plate member 3 of the mask device 4. When the mask device 4 is positioned so as to cover the non-application surface 3b of the flat plate member 3, the gap d 'between the end surface of the projection 4b and the surface of the flat plate member 3 causes the masking agent to have a capillary action. The mask device 4 is configured to be disposed on the surface of the flat plate member 3 so as to be less than such a gap, for example, about 0.5 mm or less. Naturally, the thickness (width) of the protruding portion 4b has a thickness necessary for causing capillary action. In this case, the masking agent supplied to the coating surface 3a of the flat plate member 3 by a coating device (not shown) is not applied to the non-coating surface 3b by a gap formed between the protrusion 4b of the mask device 4 and the surface of the flat plate member 3. Is prevented from going to. That is, the masking agent accumulates in the gap by capillary action, and is prevented from going from the gap to the non-application surface 3b by its surface tension. In addition, you may arrange | position so that the protrusion part 4b of the mask apparatus 4 may contact | abut the surface of the flat member 3. FIG.
[0011]
The operation of the mask device having the above configuration will be described.
First, the flat plate member 3 such as a printed board is positioned and held at a predetermined position. Next, the non-application surface 3 b of the flat plate member 3 is covered with the mask device 4. At this time, the mask device 4 is held on the flat plate member 3 so that the gap d ′ formed between the protrusion 4b of the mask device 4 and the surface of the flat plate member 3 is about 0.5 mm or less. . Next, a masking agent is supplied onto the application surface 3a of the flat plate member 3 by an application device (not shown) to apply the application surface 3a. The masking agent that has splashed as a droplet upon application of the masking agent is prevented from adhering to the non-application surface 3b by the mask device 4 and the protrusion 4b. In particular, the masking agent that has jumped between the protrusion 4b and the surface of the flat plate member 3 penetrates into the gap d 'formed between the protrusion 4b and the surface of the flat plate member 3 by capillary action. Since it is held by the surface tension and is in a liquid reservoir state, it can be reliably prevented from adhering to the non-application surface 3b.
[0012]
FIG. 5 is a perspective view of a printed circuit board 3 which is a suitable example of the flat plate member 3 on which masking coating is performed. 3a shows a coated surface and 3b shows a non-coated surface.
[0013]
As described above, in the masking agent coating method and apparatus of the present invention, a predetermined gap that causes capillary action is provided between the surface of the flat plate member, the coating surface is covered with the coating device, and coating is performed. By injecting a liquid masking agent into the gap between the surface and the coating device, and by providing a protrusion on the coating device and bringing the protrusion into contact with the surface of the flat member, a circuit is formed in a flat member such as a printed circuit board. Even if the distance between the masking agent coating surface and the non-coating surface becomes narrow, it is possible to reliably prevent the masking agent from adhering to the non-coating portion.
Similarly, in the mask method and apparatus of the present invention, a protrusion having a predetermined thickness (width) is provided on the outer peripheral edge of the front end surface of the mask apparatus, and the gap between the protrusion and the surface of the flat plate member is kept below a predetermined dimension. As a result, in a flat member such as a printed circuit board, even if the circuit becomes dense and the distance between the masking agent application surface and the non-application surface becomes narrow, the masking agent is not applied when the masking agent is applied. Adherence to the coated surface can be reliably prevented.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a masking agent coating apparatus according to a first embodiment of the present invention.
FIG. 2 is a partially enlarged view of a masking agent coating apparatus according to a second embodiment of the present invention.
FIG. 3 is a schematic configuration diagram of a mask device according to a third embodiment of the present invention.
FIG. 4 is a diagram for explaining the operation of the mask device of the present invention.
FIG. 5 is a perspective view of a printed circuit board as a preferred example of a flat plate member on which masking application is performed.
FIG. 6 is a conventional coating apparatus of (a) spray type nozzle and (b) dot type nozzle.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... (Masking agent) Coating apparatus 1a ... End surface 1b ... Protrusion 2 ... Discharge port 3 ... Flat plate member (printed circuit board)
3a ... application surface 3b ... non-application surface 4 ... mask device 4a ... tip 4b ... projection

Claims (4)

プリント基板等の平板状部材の表面に液状のマスキング剤を塗布するマスキング剤塗布方法において、
マスキング剤の吐出口を含む塗布装置の先端面が、該平板状部材の表面に対向して平坦に形成されていると共に、該先端面の外周縁に突起が形成されていて、該突起を該平板状部材の表面に接触させることによって、該先端面が該平板状部材の塗布面をカバーするように、該平板状部材の表面との間に毛管作用を起すような所定の隙間が形成され、該隙間に該吐出口からマスキング剤を注入することを特徴とするマスキング剤塗布方法。In the masking agent coating method of coating a liquid masking agent on the surface of a flat plate member such as a printed circuit board,
The distal end surface of the coating apparatus including a discharge port of the masking agent, have Rutotomoni been formed flat so as to be opposed to the surface of the plate-like member, projections on the outer periphery of the distal end surface is formed, the said projection By contacting the surface of the flat plate member, a predetermined gap is formed between the surface of the flat plate member so as to cause capillary action so that the tip end surface covers the coated surface of the flat plate member. A masking agent coating method comprising injecting a masking agent into the gap from the discharge port. プリント基板等の平板状部材の表面に液状のマスキング剤を塗布するマスキング剤塗布装置において、
マスキング剤の吐出口を含む該塗布装置の先端面が、該平板状部材の平らな表面に対向するように平坦に形成されていると共に、該先端面の外周縁に突起が形成されていて、該突起を該平板状部材の表面に接触させることによって、該先端面が該平板状部材の塗布面をカバーし、該先端面と該塗布面との間で毛管作用を起すような隙間を形成する構造となっていることを特徴とするマスキング剤塗布装置。In a masking agent coating apparatus that coats a liquid masking agent on the surface of a flat plate member such as a printed circuit board,
The distal end surface of the coating apparatus including a discharge port of the masking agent, have Rutotomoni have formed flat so as to face the flat surface of the tabular member, the projection on the outer periphery of the distal end surface is formed, By bringing the protrusion into contact with the surface of the flat plate member , the tip surface covers the coating surface of the flat plate member and forms a gap that causes capillary action between the tip surface and the coating surface. A masking agent applicator characterized by having a structure to perform. プリント基板等の平板状部材の表面に液状のマスキング剤を塗布する際に、該マスキング剤が該平板状部材の非塗布面に付着することを防止するマスク方法において、
マスク装置で該平板状部材の非塗布面をカバーすると共に、該マスク装置の該平板状部材と対面する面の外周縁に形成された突出部が、該平板状部材の表面との間に毛管作用を起すような間隙以下に保持された状態で、マスキング剤が該平板状部材の塗布面に注入されることを特徴とするマスク方法。In a mask method for preventing the masking agent from adhering to the non-coated surface of the flat plate member when applying a liquid masking agent to the surface of the flat plate member such as a printed circuit board,
The mask device covers the non-coated surface of the flat plate member, and a protrusion formed on the outer peripheral edge of the surface of the mask device facing the flat plate member is connected to the surface of the flat plate member with a capillary. A masking method, wherein a masking agent is injected into the coated surface of the flat plate member in a state where the gap is maintained below a gap that causes an action. プリント基板等の平板状部材の表面に液状のマスキング剤を塗布する際に、該マスキング剤が該平板状部材の非塗布面に付着することを防止するためのマスク装置において、
該マスク装置が該平板状部材と対面する面の外周縁に突出部が形成されており、マスキング剤を該平板状部材に塗布する際に、該突出部が、該平板状部材の表面との間に毛管作用を起すような間隙以下に保持されることによって、該マスク装置が該平板状部材の非塗布面をカバーすることを特徴とするマスク装置。In a mask apparatus for preventing the masking agent from adhering to the non-application surface of the flat plate member when applying a liquid masking agent to the surface of the flat plate member such as a printed circuit board,
A protrusion is formed on the outer peripheral edge of the surface of the mask device that faces the flat plate member. When the masking agent is applied to the flat plate member , the protrusion portion is in contact with the surface of the flat plate member. by being kept below the gap that cause capillary action between the mask device, characterized in that the mask device to cover a non-coated surface of the plate-like member.
JP2001196903A 2001-06-28 2001-06-28 Masking agent application method and apparatus, and mask method and apparatus Expired - Fee Related JP3815267B2 (en)

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