JPH0770286B2 - Method for forming screen surface of color picture tube - Google Patents
Method for forming screen surface of color picture tubeInfo
- Publication number
- JPH0770286B2 JPH0770286B2 JP61172079A JP17207986A JPH0770286B2 JP H0770286 B2 JPH0770286 B2 JP H0770286B2 JP 61172079 A JP61172079 A JP 61172079A JP 17207986 A JP17207986 A JP 17207986A JP H0770286 B2 JPH0770286 B2 JP H0770286B2
- Authority
- JP
- Japan
- Prior art keywords
- graphite
- film
- picture tube
- color picture
- face panel
- 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 - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 30
- 229910002804 graphite Inorganic materials 0.000 claims description 28
- 239000010439 graphite Substances 0.000 claims description 28
- 239000000725 suspension Substances 0.000 claims description 16
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 9
- 239000004094 surface-active agent Substances 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims 1
- 239000010408 film Substances 0.000 description 32
- 238000000576 coating method Methods 0.000 description 5
- 230000031700 light absorption Effects 0.000 description 5
- 229920002120 photoresistant polymer Polymers 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 1
- JOSWYUNQBRPBDN-UHFFFAOYSA-P ammonium dichromate Chemical compound [NH4+].[NH4+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O JOSWYUNQBRPBDN-UHFFFAOYSA-P 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- -1 polyoxyethylene sulfate salt Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 125000000020 sulfo group Chemical group O=S(=O)([*])O[H] 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Landscapes
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、カラー受像管のブラックマトリックス形式ス
クリーン面の形成方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of forming a black matrix type screen surface of a color picture tube.
従来の技術 一般に、カラー受像管のブラックマトリックス形式スク
リーン面における光吸収膜は、いわゆる仮ドット法によ
って形成される。この場合、第２図（ａ）に示すよう
に、フェースパネルの１の内面にポリビニールアルコー
ル（PVA）および重クロム酸アンモニウムからなるホト
レジスト膜２を一様に塗布形成したのち、このフェース
パネル１内に所定のシャドウマスクを装着する。そし
て、管の偏向中心となるべき位置に設けた点光源から放
射されて補正レンズおよびシャドウマスクを通じた露光
用紫外線をホトレジスト膜２に与え、このホトレジスト
膜２を選択的に露光する。この露光処理は、点光源の設
置位置を少しずつ変えて通信３回行なわれ、これによっ
て第２図（ｂ）に示すように、シャドウマスクのアパー
チャ数の３倍に相当する数の露光点３が群生し、当該部
分が硬化する。つぎに、このホトレジスト膜に温水シャ
ワーによる現像処理を施すと、ホトレジスト膜２の非露
光部分４が膨潤して剥離し、第２図（ｃ）に示すような
仮ドット５が形成される。つぎに、光吸収物質たる黒鉛
の微粉末を分散してなう懸濁液、例えばアチソン社製の
アクアダック（商品名）を水に溶かしたものを、フェー
スパネル１の内面に一様に塗布して、第２図（ｄ）に示
す黒鉛膜６を形成し、しかるのち、過酸化水素液による
エッチング処理で、仮ドット５とその表面上にあった黒
鉛膜部分とをとり除く。これにより、第２図（ｅ）に示
すような多数の穴７を有する黒鉛膜となる光吸収膜８が
できあがるので、つぎに各穴７内に青、赤おび緑の各発
光をなす３種類の蛍光体ドットまたは蛍光体細条を、写
真印刷法による選択露光および現像処理により形成す
る。2. Description of the Related Art In general, the light absorption film on the black matrix type screen surface of a color picture tube is formed by a so-called temporary dot method. In this case, as shown in FIG. 2 (a), a photoresist film 2 made of polyvinyl alcohol (PVA) and ammonium dichromate is uniformly formed on the inner surface of the face panel 1 and then the face panel 1 is formed. Install a prescribed shadow mask inside. Then, exposure ultraviolet rays emitted from a point light source provided at a position to be the deflection center of the tube and passed through the correction lens and the shadow mask are applied to the photoresist film 2, and the photoresist film 2 is selectively exposed. This exposure processing is performed three times by changing the installation position of the point light source little by little, and as a result, as shown in FIG. 2B, the number of exposure points 3 corresponding to three times the number of apertures of the shadow mask is set. Clusters and the part is hardened. Next, when the photoresist film is subjected to a developing treatment with a hot water shower, the non-exposed portion 4 of the photoresist film 2 swells and peels off, and a temporary dot 5 as shown in FIG. 2 (c) is formed. Next, a suspension prepared by dispersing fine graphite powder, which is a light-absorbing substance, for example, a solution of Aquadac (trade name) manufactured by Acheson Co., Ltd. in water is uniformly applied to the inner surface of the face panel 1. Then, the graphite film 6 shown in FIG. 2 (d) is formed, and thereafter, the temporary dots 5 and the graphite film portion on the surface thereof are removed by etching treatment with a hydrogen peroxide solution. As a result, a light absorbing film 8 which is a graphite film having a large number of holes 7 as shown in FIG. 2 (e) is formed. Next, three kinds of blue, red and green light emission are made in each hole 7. The phosphor dots or the phosphor strips of 1 are formed by selective exposure and development processing by a photo printing method.
発明が解決しようとする課題 ところが、仮ドットを形成したのちのフェースパネル１
の内面に黒鉛懸濁液を下方から塗布する水平塗布法によ
って適正薄膜0.5〜1.2μｍの黒鉛膜６を形成したとこ
ろ、第２図（ｄ）に示すように、フェースパネル１のと
くにコーナ部付近における黒鉛膜厚が適正膜厚に達せ
ず、0.2〜0.4μｍになってしまうという問題が生じた。
また、第３図に示すように、光吸収膜８に無数のピンホ
ール９が生じやすいという問題もあった。このようなこ
とがあると、スクリーン面全域で均一な発光特性および
コントラスト特性を得ることが困難になる。Problem to be Solved by the Invention However, the face panel 1 after forming the provisional dots
When a graphite film 6 having an appropriate thin film of 0.5 to 1.2 μm was formed by a horizontal coating method in which the graphite suspension was coated from below on the inner surface of the sheet, as shown in FIG. There was a problem that the graphite film thickness in (2) did not reach the proper film thickness and became 0.2 to 0.4 μm.
Further, as shown in FIG. 3, there is also a problem that countless pinholes 9 are likely to be formed in the light absorption film 8. In such a case, it becomes difficult to obtain uniform light emission characteristics and contrast characteristics over the entire screen surface.
なお、このようなピンホール９の発生を防ぐために、例
えば特公昭58−47815号公報に記載されているように、
黒鉛懸濁液中にポリオキシエチレンサルフェート塩系の
界面活性剤を添加する技術が知られているが、フェース
パネルの内面に黒鉛懸濁液を上記した水平塗布法を用い
て塗布した場合、特に、フェースパネルのコーナ部付近
の黒鉛膜厚が他の箇所のそれよりも薄くなり、十分な効
果が得られなかった。In order to prevent the occurrence of such a pinhole 9, for example, as disclosed in Japanese Patent Publication No. 58-47815,
Although a technique of adding a polyoxyethylene sulfate salt-based surfactant to a graphite suspension is known, when the graphite suspension is applied to the inner surface of the face panel by the above horizontal application method, The graphite film thickness in the vicinity of the corners of the face panel became thinner than that in other parts, and a sufficient effect was not obtained.
課題を解決するための手段 本発明はカラー受像管スクリーン面の形成方法は、フェ
ースパネルの内面であって、蛍光体ドットまたは蛍光体
細条の付設領域間に、黒鉛を含む懸濁液を下方から塗布
して黒鉛膜を形成するにさいし、前記懸濁液中に分散黒
鉛の0.2〜２重量％に相当する量のジアルキルスルホサ
クシネート系の界面活性剤を添加するものである。Means for Solving the Problems The present invention provides a method for forming a screen of a color picture tube, which is an inner surface of a face panel, wherein a suspension containing graphite is downwardly provided between regions where phosphor dots or phosphor strips are provided. When a graphite film is formed by coating from above, a dialkylsulfosuccinate-based surfactant is added to the suspension in an amount corresponding to 0.2 to 2% by weight of the dispersed graphite.
作用 このようにすると、界面活性剤のスルホ基とカルボニル
基との作用により、懸濁液中の黒鉛の分散性が良好とな
るのみならず、黒鉛懸濁液のフェースパネルに対する濡
れも良好となる。By doing so, not only the dispersibility of graphite in the suspension is improved by the action of the sulfo group and the carbonyl group of the surfactant, but also the wetting of the graphite suspension to the face panel is improved. .
実施例 本発明者らは、ジアルキルスルホサクシネート系の界面
活性剤として、GAF社製のヒュミヘンWS−25（商品名）
を用いた。黒鉛の微粉末を分散させた懸濁液中に前述の
界面活性剤を分散黒鉛の0.2〜２重量％添加したもの
は、黒鉛の分散性およびフェースパネル内面への濡れが
ともに良好となり、フェースパネルの内面にその下方か
ら塗布して得られた黒鉛膜は、コーナ部においても十分
な膜厚を有することが判明した。また、かかる黒鉛膜に
前述のようなエッチング処理を施して光吸収膜を形成し
たところ、ピンホールはほとんど認められなかった。Example The inventors of the present invention, as a dialkylsulfosuccinate-based surfactant, Humichen WS-25 (trade name) manufactured by GAF
Was used. When the above-mentioned surfactant is added to the suspension containing the fine graphite powder in an amount of 0.2 to 2% by weight of the dispersed graphite, both the dispersibility of the graphite and the wetting to the inner surface of the face panel are improved, and the face panel is improved. It was found that the graphite film obtained by coating the inner surface of the above from below has a sufficient film thickness even at the corner portion. Further, when such a graphite film was subjected to the above-mentioned etching treatment to form a light absorbing film, pinholes were hardly observed.
第１図は前記界面活性剤（ヒュミヘンWS−25）の添加量
（分散黒鉛に対する重量％）を横軸にとり、光吸収膜の
フェースパネルコーナ部における膜厚不足およびピンホ
ールの発生による不良率（光透過量によって判断）を縦
軸にとったものである。この実験結果から明らかなよう
に、前記添加量が0.2重量％未満であると、膜厚不足お
よびピンホールが相対的に多く発生する。0.2重量％で
は、まだ十分とは云えないにしても、はじきむらと称さ
れる不良が少なくなり、0.3重量％以上になると、光吸
収膜のフェースパネルコーナ部における膜厚を0.5〜1.2
μｍになし得、ピンホールの発生も激減する。また、２
重量％を越えると、黒鉛懸濁液の塗布むらが発生しやす
くなる。したがって、0.2〜２重量％、さらに好ましく
は0.3〜１重量％に設定すると、良好な光吸収膜、した
がって良好なブラックマトリックス形式スクリーン面を
得ることができる。In Fig. 1, the horizontal axis represents the amount of the surfactant (HUMIHEN WS-25) added (% by weight based on the dispersed graphite), and the defect rate due to insufficient film thickness and pinholes in the face panel corners of the light absorbing film ( (Determined by the amount of light transmission) is plotted on the vertical axis. As is clear from the results of this experiment, if the addition amount is less than 0.2% by weight, insufficient film thickness and relatively many pinholes occur. If 0.2% by weight is not sufficient, defects called cissing unevenness are reduced, and if 0.3% by weight or more, the thickness of the light absorbing film at the corner portion of the face panel is 0.5 to 1.2.
It can be made as small as μm, and the occurrence of pinholes is drastically reduced. Also, 2
When the content exceeds the weight%, uneven coating of the graphite suspension is likely to occur. Therefore, when it is set to 0.2 to 2% by weight, more preferably 0.3 to 1% by weight, a good light absorbing film, and thus a good black matrix type screen surface can be obtained.
また、光吸収膜の穴内に３種類の蛍光体ドットまたは蛍
光体細条を形成するさいにも、それらの蛍光体懸濁液中
に前述のようなジアルキルスルホサクシネート系の界面
活性剤を前述と同様の量だけ添加することができる。Also, when three kinds of phosphor dots or phosphor strips are formed in the holes of the light absorption film, the dialkylsulfosuccinate-based surfactant as described above is added to the phosphor suspension. Can be added in an amount similar to.
発明の効果 以上説明したように、本発明のカラー受像管スクリーン
面の形成方法によれば、黒鉛懸濁液中の黒鉛の分散性お
よび粘度を良好かつ安定にすることができ、フェースパ
ネルに下方から黒鉛懸濁液を塗布する水平塗布方法にお
いて、フェースパネル内面のコーナ部でも十分な膜厚の
光吸収膜を、ピンホールをほとんど生じることなく形成
することが可能となり、全域で良好な発光特性およびコ
ントラスト特性を示す受像管スクリーン面を得ることが
できる。また、本発明方法は、前記水平塗布方法を用い
ているので、黒鉛膜の形成時、黒鉛懸濁液中に塵埃が混
入せず、品質のすぐれた光吸収膜が得られ、また前記黒
鉛懸濁液を回収して再利用できるという利点をも有する
ものである。EFFECTS OF THE INVENTION As described above, according to the method for forming the screen of the color picture tube of the present invention, the dispersibility and viscosity of the graphite in the graphite suspension can be made good and stable, and the lower surface of the face panel is suppressed. In the horizontal application method of applying the graphite suspension from the above, it becomes possible to form a light absorption film with sufficient thickness even at the corners of the inner surface of the face panel with almost no pinholes, and good emission characteristics over the entire area. It is possible to obtain a picture tube screen surface exhibiting contrast characteristics. In addition, since the method of the present invention uses the horizontal coating method, dust is not mixed in the graphite suspension during formation of the graphite film, and a high quality light-absorbing film can be obtained. It also has the advantage that the suspension can be recovered and reused.
第１図は本発明の実施において用いられる界面活性剤の
添加量（重量％）と、光吸収膜の不良率（相対値）との
関係を示す図、第２図は光吸収膜の形成過程を示す断面
図、第３図は光吸収膜に発生するピンホールを例示する
平面図である。FIG. 1 is a diagram showing the relationship between the addition amount (wt%) of a surfactant used in the practice of the present invention and the defect rate (relative value) of the light absorbing film, and FIG. 2 is the process of forming the light absorbing film. And FIG. 3 is a plan view illustrating a pinhole generated in the light absorption film.
Claims (1)
ットまたは蛍光体細条の付設領域間に、黒鉛を含む懸濁
液を下方から塗布して黒鉛膜を形成するにさいし、前記
懸濁液中に分散黒鉛の0.2〜２重量％に相当する量のジ
アルキルスルホサクシネート系の界面活性剤を添加する
ことを特徴とするカラー受像管スクリーン面の形成方
法。1. A suspension containing graphite is applied from below on the inner surface of a face panel and between the areas where phosphor dots or phosphor strips are provided to form a graphite film. A method for forming a screen of a color picture tube, comprising adding a dialkylsulfosuccinate-based surfactant in an amount corresponding to 0.2 to 2% by weight of dispersed graphite in a liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61172079A JPH0770286B2 (en) | 1986-07-22 | 1986-07-22 | Method for forming screen surface of color picture tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61172079A JPH0770286B2 (en) | 1986-07-22 | 1986-07-22 | Method for forming screen surface of color picture tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6329430A JPS6329430A (en) | 1988-02-08 |
| JPH0770286B2 true JPH0770286B2 (en) | 1995-07-31 |
Family
ID=15935145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61172079A Expired - Lifetime JPH0770286B2 (en) | 1986-07-22 | 1986-07-22 | Method for forming screen surface of color picture tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0770286B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5847815B2 (en) * | 1975-03-05 | 1983-10-25 | 株式会社日立製作所 | color |
| JPS60124699A (en) * | 1983-12-12 | 1985-07-03 | 旭化成株式会社 | Dry cleaning detergent composition |
-
1986
- 1986-07-22 JP JP61172079A patent/JPH0770286B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6329430A (en) | 1988-02-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |