JPH0345503B2 - - Google Patents
Info
- Publication number
- JPH0345503B2 JPH0345503B2 JP55166539A JP16653980A JPH0345503B2 JP H0345503 B2 JPH0345503 B2 JP H0345503B2 JP 55166539 A JP55166539 A JP 55166539A JP 16653980 A JP16653980 A JP 16653980A JP H0345503 B2 JPH0345503 B2 JP H0345503B2
- Authority
- JP
- Japan
- Prior art keywords
- aqueous solution
- panel
- forming
- picture tube
- naoh
- 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
- 238000004140 cleaning Methods 0.000 claims description 35
- 239000007864 aqueous solution Substances 0.000 claims description 31
- 238000000034 method Methods 0.000 claims description 26
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000005406 washing Methods 0.000 claims description 11
- 239000000243 solution Substances 0.000 claims description 6
- 150000008044 alkali metal hydroxides Chemical class 0.000 claims description 5
- 150000007524 organic acids Chemical class 0.000 claims description 5
- 229910019142 PO4 Inorganic materials 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 2
- 229910001514 alkali metal chloride Inorganic materials 0.000 claims description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 2
- 239000010452 phosphate Substances 0.000 claims description 2
- 238000000151 deposition Methods 0.000 claims 1
- -1 organic acid salt Chemical class 0.000 claims 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 87
- 239000010408 film Substances 0.000 description 30
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 24
- 230000000694 effects Effects 0.000 description 16
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 12
- 239000011347 resin Substances 0.000 description 12
- 229920005989 resin Polymers 0.000 description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- 239000010439 graphite Substances 0.000 description 8
- 229910002804 graphite Inorganic materials 0.000 description 8
- 239000011159 matrix material Substances 0.000 description 7
- 230000006378 damage Effects 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- TUSDEZXZIZRFGC-UHFFFAOYSA-N 1-O-galloyl-3,6-(R)-HHDP-beta-D-glucose Natural products OC1C(O2)COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC1C(O)C2OC(=O)C1=CC(O)=C(O)C(O)=C1 TUSDEZXZIZRFGC-UHFFFAOYSA-N 0.000 description 4
- 239000001263 FEMA 3042 Substances 0.000 description 4
- LRBQNJMCXXYXIU-PPKXGCFTSA-N Penta-digallate-beta-D-glucose Natural products OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-PPKXGCFTSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 235000015523 tannic acid Nutrition 0.000 description 4
- LRBQNJMCXXYXIU-NRMVVENXSA-N tannic acid Chemical compound OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-NRMVVENXSA-N 0.000 description 4
- 229940033123 tannic acid Drugs 0.000 description 4
- 229920002258 tannic acid Polymers 0.000 description 4
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 description 2
- 229910000397 disodium phosphate Inorganic materials 0.000 description 2
- 235000019800 disodium phosphate Nutrition 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 235000021317 phosphate Nutrition 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 201000004813 Bronchopneumonia Diseases 0.000 description 1
- 208000009043 Chemical Burns Diseases 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 206010014561 Emphysema Diseases 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical class [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 239000011591 potassium Chemical class 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2209/00—Apparatus and processes for manufacture of discharge tubes
- H01J2209/01—Generalised techniques
- H01J2209/017—Cleaning
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
Description
【発明の詳細な説明】
本発明は受像管けい光面の形成方法、特にブラ
ウン管のフエースプレートの内面にけい光膜を形
成するのに先立つて行なわれるフエースプレート
の洗浄方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for forming a fluorescent surface of a cathode ray tube, and more particularly to a method for cleaning a face plate of a cathode ray tube prior to forming a fluorescent film on the inner surface of the face plate.
一般に受像管、例えばカラー受像管けい光面
は、赤、青、緑の三色に発光するけい光体の絵素
をドツト状あるいはストライプ状に規則正しく配
列して形成され、それらの間隙部には光吸収物質
が形成された構成となつている。 In general, a picture tube, such as a color picture tube, has a phosphor surface that is formed by regularly arranging phosphor picture elements that emit light in three colors, red, blue, and green, in the form of dots or stripes. It has a structure in which a light-absorbing substance is formed.
このようなけい光面は次のような方法で形成さ
れる。すなわちまず最初にフエースプレートパネ
ル（以下パネルと称する）の内面に光硬化性の感
光性樹脂膜を形成し、シヤドウマスクを介して露
光し、けい光体塗布所望部位を硬化させた後、温
水現像し、未硬化の部分を除去する。次いで黒鉛
スラリーをパネル内面に塗布、乾燥し、黒鉛膜を
形成する。しかる後、剥離剤を用いて感光性樹脂
膜およびその上面に塗布された黒鉛膜を剥離、除
去し、黒鉛膜に開孔部を形成し、この部分のガラ
スパネル面を露出させてブラツクマトリツクス膜
を形成する。 Such a fluorescent surface is formed by the following method. That is, first, a photocurable photosensitive resin film is formed on the inner surface of a face plate panel (hereinafter referred to as the panel), exposed to light through a shadow mask to cure the desired area to which the phosphor is applied, and then developed with hot water. , remove the uncured parts. Next, graphite slurry is applied to the inner surface of the panel and dried to form a graphite film. Thereafter, the photosensitive resin film and the graphite film coated on its top surface are peeled off and removed using a release agent, and an opening is formed in the graphite film to expose the surface of the glass panel in this area and then exposed to the black matrix. Forms a film.
次に、上記ブラツクマトリツクス膜が形成され
たパネル内面にけい光体絵素を形成する。この場
合、このけい光体絵素は通常一般に行なわれてい
るスラリー法またはダステイング法によつて緑、
青、赤の三色のけい光体ドツトまたはストライプ
状のけい光体層を形成する。その後、このけい光
体層上に樹脂層形成、金属反射膜形成およびベー
キング等の公知の手段により、けい光面を完成す
る。 Next, phosphor picture elements are formed on the inner surface of the panel on which the black matrix film is formed. In this case, the phosphor pixel is usually colored green by a commonly used slurry or dusting method.
A phosphor layer in the form of three-color phosphor dots or stripes of blue and red is formed. Thereafter, a phosphor surface is completed on this phosphor layer by known means such as forming a resin layer, forming a metal reflective film, and baking.
このようなけい光面の形成方法において、ブラ
ツクマトリツクス膜の黒鉛膜形成に先立つて行な
われる感光性樹脂膜の膜厚は通常0.5〜3.0μm程度
と極めて薄い薄膜状に形成されるので、パネルの
内面にゴミ等の小さな異物が付着すると、この感
光性樹脂膜の均一な膜厚が得られなくなる。一
方、この感光性樹脂膜の感度、パネル内面への接
着性は膜厚に依存する。したがつて、パネル内面
にゴミ等の小さな異物が付着すると、その異物部
分およびその周辺部分の感光性樹脂膜厚が他の部
分と異なるため、その部分が欠点として見え、け
い光面の品質を著しく低下させていた。また、カ
ラーブラウン管に使用されているけい光体は微量
の不純物が塗布面に存在すると、電子ビームで照
射したときの発光輝度の低下もしくは発光色が変
化するなどの不具合点があつた。例えばけい光体
として青色に発光する硫化物けい光体（ZnS：
Ag）を使用した場合、付着した上記異物中に微
量の銅（Cu））が含有されていると、けい光膜形
成後のベーキング工程でZnS：Cuのけい光体が
形成され、黄色に発光するけい光体となる。これ
が上記異物が付着した部分に形成される。このた
め、けい光面を青色に発光させた場合、異物のあ
る部分が斑点状に黄色に発光してしまうという欠
点を有していた。このようなことから、高品質の
けい光面を得るために行なわれる通常の方法は、
けい光膜を形成する以前にパネル内面を十分に洗
浄することが行なわれている。その代表的な方法
としては、パネル内面にブラツクマトリツクス膜
形成用の光硬化形感光性樹脂膜を形成する以前に
パネル内面を弗化水素酸水溶液で洗浄し、ガラス
表面を溶解させ、清浄なガラス面を露出させた
後、脱イオン水ですすぎ洗いを行なつて乾燥さ
せ、次に前述したブラツクマトリツクス膜形成用
の光硬化形感光性樹脂膜を形成して前述の工程を
経てけい光膜を完成する。 In this method of forming a fluorescent surface, the photosensitive resin film that is formed prior to the formation of the graphite film of the black matrix film is usually formed into an extremely thin film of about 0.5 to 3.0 μm, so the panel If small foreign matter such as dust adheres to the inner surface of the photosensitive resin film, it becomes impossible to obtain a uniform thickness of the photosensitive resin film. On the other hand, the sensitivity and adhesion of this photosensitive resin film to the inner surface of the panel depend on the film thickness. Therefore, if small foreign matter such as dust adheres to the inner surface of the panel, the thickness of the photosensitive resin film on the foreign matter and the surrounding area will be different from other parts, making that area visible as a defect, which will affect the quality of the fluorescent surface. It had decreased significantly. In addition, the phosphor used in color cathode ray tubes has problems such as a decrease in luminance or a change in the color of the emitted light when irradiated with an electron beam if a small amount of impurity is present on the coated surface. For example, a sulfide phosphor (ZnS:
If a trace amount of copper (Cu) is used in the adhered foreign matter, a ZnS:Cu phosphor will be formed in the baking process after forming the phosphor film, and it will emit yellow light. It becomes a fluorescent substance. This is formed in the area where the foreign matter has adhered. For this reason, when the fluorescent surface is made to emit blue light, there is a drawback in that areas where foreign substances are present emit yellow light in spots. For this reason, the usual methods used to obtain high-quality fluorescent surfaces are:
The inner surface of the panel is thoroughly cleaned before forming the fluorescent film. A typical method is to clean the inside surface of the panel with an aqueous solution of hydrofluoric acid to dissolve the glass surface and clean it before forming a photocurable photosensitive resin film for forming a black matrix film on the inside surface of the panel. After exposing the glass surface, it is rinsed with deionized water and dried, and then the photocurable photosensitive resin film for forming the black matrix film described above is formed, and the above-mentioned process is completed to fluoresce. Complete the membrane.
しかしながら上述したけい光面の形成方法にお
いて、高品質のけい光面を得るために、パネル洗
浄用として、弗化水素酸または弗素化合物（以下
弗酸と記す）水溶液を用いている。ところが、こ
の弗酸水溶液は、蒸発しやすい性質を有し、かつ
そのガスは金属を腐蝕させやすく、しかも人体に
対して極めて有害であり、吸入した場合には肺気
腫、気管支肺炎等を引き起すとともに、皮膚等に
付着した場合には薬火傷を起す等の障害があり、
極めて危険な薬品である。したがつて、弗酸水溶
液を使用するには、生産設備に耐蝕性材料を使用
した装置が必要となり、また換気や取り扱い上、
防護具等が必要となる。さらに受像管内にこの弗
酸が残存していた場合には、受像管内に収納され
た電子銃の電子放射特性に著しい損傷を与え、受
像管の寿命が短縮されるという欠点を有してい
た。 However, in the method for forming a fluorescent surface described above, in order to obtain a high-quality fluorescent surface, hydrofluoric acid or an aqueous solution of a fluorine compound (hereinafter referred to as hydrofluoric acid) is used for cleaning the panel. However, this hydrofluoric acid aqueous solution has the property of easily evaporating, and its gas easily corrodes metals, and is extremely harmful to the human body, causing emphysema, bronchopneumonia, etc. if inhaled. If it comes into contact with the skin, it may cause harm such as chemical burns.
It is an extremely dangerous drug. Therefore, in order to use hydrofluoric acid aqueous solution, production equipment needs to be made of corrosion-resistant materials, and ventilation and handling issues are required.
Protective equipment etc. will be required. Furthermore, if this hydrofluoric acid remains in the picture tube, it causes significant damage to the electron emission characteristics of the electron gun housed in the picture tube, resulting in a disadvantage that the life of the picture tube is shortened.
したがつて、本発明は、パネルの洗浄にアルカ
リ金属水酸化物を用いることによつて、人体、生
産設備および受像管に与える幣害を確実に除去し
て弗酸水溶液の使用とほぼ同等の清浄効果が得ら
れ、品質の高い優れたけい光面が得られる受像管
けい光面の形成方法を提供することを目的として
いる。 Therefore, the present invention uses an alkali metal hydroxide to clean the panel, thereby reliably removing damage to the human body, production equipment, and picture tubes, and cleaning the panel almost as effectively as using an aqueous hydrofluoric acid solution. The object of the present invention is to provide a method for forming a fluorescent surface of a picture tube, which provides a cleaning effect and provides an excellent fluorescent surface of high quality.
すなわち、本発明は、アルカリ金属水酸化物の
水溶液が油等の撥水性の汚れを溶解除去し、かつ
ガラスをも溶解する特性を巧みに利用し、弗酸水
溶液を使用した条件とほぼ同等の清浄特性を得る
ようにしたものである。このアルカリ金属の水酸
化物のうち、例えば、水酸化ナトリウム（以下
NaOHと記す）は、万一水洗後、残存したとし
ても受像管製造工程のベーキングを通過すると、
NaOHとして残るが、電子放射特性を損傷する
等の不具合は全くない。また、NaOH水溶液の
洗浄後、水洗により容易にパネルよりNaOHを
除去することができる。また、NaOHは金属を
腐蝕させる性質はないので、特に生産設備に耐蝕
性材料を使用しなくても良い利点を有している。
また、このNaOH水溶液にタンニン酸、クエン
酸等の有機酸もしくはリン酸塩等を添加または加
温することによつて、パネルの溶解性、洗浄効果
が促進されるという効果が得られた。さらに、こ
のNaOHの他にアルカリ金属であるカリウム、
リチウム等の水酸化物の水溶液も同様の効果が得
られた。 That is, the present invention skillfully utilizes the property that an aqueous solution of alkali metal hydroxide dissolves and removes water-repellent stains such as oil, and also dissolves glass, thereby achieving conditions almost equivalent to those using an aqueous hydrofluoric acid solution. It is designed to have clean properties. Among these alkali metal hydroxides, for example, sodium hydroxide (hereinafter referred to as
Even if NaOH (denoted as NaOH) remains after washing with water, if it passes through the baking process of the picture tube manufacturing process, it will
Although it remains as NaOH, there is no problem such as damage to electron emission characteristics. Further, after washing the NaOH aqueous solution, NaOH can be easily removed from the panel by washing with water. Furthermore, since NaOH does not have the property of corroding metals, it has the advantage that it does not require the use of corrosion-resistant materials in production equipment.
Further, by adding or heating an organic acid such as tannic acid or citric acid or a phosphate to this NaOH aqueous solution, the solubility of the panel and the cleaning effect were promoted. In addition to this NaOH, potassium, an alkali metal,
A similar effect was obtained with an aqueous solution of hydroxide such as lithium.
以下実施例を用いて本発明を詳細に説明する。 The present invention will be explained in detail below using Examples.
第１図は本発明による受像管けい光面の形成方
法の一実施例を説明するための要部断面構成図で
ある。同図において、洗浄タンク１内には
NaOHが約30重量％混入された水溶液２を収容
し、この水溶液２の液温を約50℃に保温してこの
水溶液２中にパネル３を入れ、約５分間浸漬し、
さらにこの水溶液２に図示しない超音波発生装置
により超音波を加える。そして、約５分経過後、
パネル３を取り出し水洗してパネル３の周面に付
着しているNaOHを除去する。これによりパネ
ル３内面の汚れが除去でき、感光性樹脂膜の塗布
工程においてもパネルを弗酸水溶液で洗浄したも
のと同特性の清浄効果が得られた。また、パネル
の汚れが著しい場合もしくは汚れが落ちにくい場
合には、上記水洗後、再度超音波を加えた水溶液
２中に浸漬して水洗する工程を交互に繰り返し行
なえば良い。さらには上記水洗工程を温水中で超
音波洗浄で行なつても良い。また、パネル３の内
面にブラツクマトリツクス用の黒鉛膜、けい光膜
が形成されたパネル組立体が不良品となつた場
合、上記NaOH水溶液２で洗浄することによつ
て、黒鉛膜、けい光膜が完全に除去されて弗酸水
溶液による洗浄と同等の清浄効果が人、物に対し
て無害の状態で得られ、パネル３の再使用が可能
となつた。 FIG. 1 is a cross-sectional configuration diagram of essential parts for explaining an embodiment of a method for forming a fluorescent surface of a picture tube according to the present invention. In the same figure, inside the cleaning tank 1 is
An aqueous solution 2 containing about 30% by weight of NaOH is contained, the temperature of the aqueous solution 2 is maintained at about 50°C, and the panel 3 is placed in the aqueous solution 2 and immersed for about 5 minutes.
Further, ultrasonic waves are applied to this aqueous solution 2 using an ultrasonic generator (not shown). Then, after about 5 minutes,
The panel 3 is taken out and washed with water to remove NaOH adhering to the circumferential surface of the panel 3. As a result, dirt on the inner surface of the panel 3 could be removed, and a cleaning effect similar to that obtained by cleaning the panel with an aqueous hydrofluoric acid solution was obtained even in the process of applying the photosensitive resin film. Furthermore, if the panel is extremely dirty or is difficult to remove, the process of immersing it in the aqueous solution 2 to which ultrasonic waves have been applied again after washing with water and washing with water may be repeated alternately. Furthermore, the above-mentioned water washing step may be performed by ultrasonic washing in hot water. In addition, if a panel assembly in which a graphite film for black matrix and a fluorescent film are formed on the inner surface of the panel 3 becomes a defective product, the graphite film and the fluorescent film can be removed by cleaning with the above NaOH aqueous solution 2. The membrane was completely removed, and a cleaning effect equivalent to that of cleaning with a hydrofluoric acid aqueous solution was obtained without causing any harm to people or objects, making it possible to reuse the panel 3.
なお、洗浄用水溶液２に含有させるNaOHは、
その濃度が低いと、パネル３の汚れ除去効果およ
びガラス溶解程度が少なくなり、清浄効果が低下
する。したがつて、NaOH濃度は発明者の実験
によると、約３重量％以上が良好であつた。ま
た、NaOH濃度が約50重量％を超えると、洗浄
液の濃度が高くなり、パネル３に付着する
NaOH量が多くなつて、NaOH洗浄後の水洗工
程でNaOHの捨てられる量が多くなる。また、
パネル３面に付着したNaOH除去に長時間と多
量の洗浄水が必要となる。さらには清浄効果は
NaOHの約50重量％を超えても向上しないこと
から、NaOHの濃度は約50重量％以下が好まし
い。したがつてNaOH濃度は３〜50重量％の範
囲が良好であつた。また、NaOHの濃度は、40
重量％以上となると清浄効果の飽和現象が現わ
れ、さらに25重量％以下では洗浄時間が長くなる
ので、25〜40重量％の範囲が最適範囲となる。 Note that NaOH contained in the cleaning aqueous solution 2 is
If the concentration is low, the dirt removal effect on the panel 3 and the degree of glass melting will be reduced, resulting in a reduced cleaning effect. Accordingly, according to the inventor's experiments, a NaOH concentration of about 3% by weight or more is good. Also, if the NaOH concentration exceeds about 50% by weight, the concentration of the cleaning solution will increase and it will adhere to panel 3.
As the amount of NaOH increases, the amount of NaOH that is discarded during the water washing process after NaOH washing increases. Also,
It takes a long time and a large amount of cleaning water to remove NaOH from the three sides of the panel. Furthermore, the cleaning effect
The concentration of NaOH is preferably about 50% by weight or less because no improvement occurs even if the concentration exceeds about 50% by weight of NaOH. Therefore, the NaOH concentration was preferably in the range of 3 to 50% by weight. Also, the concentration of NaOH is 40
When the content exceeds 25% by weight, the cleaning effect becomes saturated, and below 25% by weight, the cleaning time becomes longer, so the optimum range is 25 to 40% by weight.
また、パネル３の所定の洗浄効果を得る洗浄時
間はNaOH水溶液２の液温が25℃では約1.0時間、
50℃では約10分、60℃では３〜５分、100℃では
約30秒程度となる結果が得られた。したがつて水
溶液２の液温を上昇させることによつて、洗浄時
間を大幅に短縮させることができた。さらに上記
NaOH水溶液２にタンニン酸またはクエン酸等
の有機酸を１重量％添加すると、洗浄時間を一層
短縮させ、かつ清浄効果も大幅に向上させること
ができた。 In addition, the cleaning time to obtain the desired cleaning effect for the panel 3 is approximately 1.0 hours when the temperature of the NaOH aqueous solution 2 is 25°C.
The results showed that the heating time was approximately 10 minutes at 50°C, 3 to 5 minutes at 60°C, and approximately 30 seconds at 100°C. Therefore, by increasing the temperature of the aqueous solution 2, the cleaning time could be significantly shortened. Further above
When 1% by weight of an organic acid such as tannic acid or citric acid was added to the NaOH aqueous solution 2, the cleaning time was further shortened and the cleaning effect was significantly improved.
第２図は本発明による受像管けい光面の形成方
法の他の実施例を説明するための要部断面構成図
である。同図において、NaOH30重量％とリン
酸水素ナトリウム１重量％とを混合した洗浄用水
溶液４をタンク５内に収容して約50℃に加熱し、
この水溶液４をポンプ６でパネル３の内面全面に
約３分間吹き付けた後、その洗浄液を水洗するこ
とにより、実施例１と全く同様の清浄効果が得ら
れた。また、パネル３の内面にブラツクマトリツ
クス用黒鉛層およびけい光膜が被着形成された場
合、さらにけい光膜上に樹脂層およびアルミニウ
ム反射層が被着形成されたパネル組立体でも、上
記洗浄法によれば、パネル内面に被着形成された
各層が完全に除去され、清浄化されたパネルが得
られた。また、上記リン酸水素ナトリウム１重量
％を含むNaOH30重量％水溶液４にタンニン酸
またはクエン酸等の有機酸を１重量％添加する
と、洗浄時間をさらに短縮させ、かつ清浄効果を
大幅に向上させることができた。 FIG. 2 is a cross-sectional configuration diagram of a main part for explaining another embodiment of the method for forming a fluorescent surface of a picture tube according to the present invention. In the figure, a cleaning aqueous solution 4 containing 30% by weight of NaOH and 1% by weight of sodium hydrogen phosphate is stored in a tank 5 and heated to about 50°C.
By spraying this aqueous solution 4 over the entire inner surface of the panel 3 for about 3 minutes using the pump 6, and then rinsing the cleaning solution with water, the same cleaning effect as in Example 1 was obtained. In addition, in the case where a graphite layer for black matrix and a fluorescent film are formed on the inner surface of the panel 3, and a panel assembly in which a resin layer and an aluminum reflective layer are further formed on the fluorescent film, the above-mentioned cleaning According to the method, each layer deposited on the inner surface of the panel was completely removed, resulting in a cleaned panel. Furthermore, when 1% by weight of an organic acid such as tannic acid or citric acid is added to the 30% by weight NaOH aqueous solution 4 containing 1% by weight of sodium hydrogen phosphate, the cleaning time can be further shortened and the cleaning effect can be significantly improved. was completed.
なお、上記実施例において、NaOH水溶液に
添加するタンニン酸、クエン酸等の有機酸および
リン酸アルカリ塩等のアルカリ金属塩化物を１重
量％程度とした場合について説明したが、この添
加量は特に限定されるものではなく、洗浄工程に
要する所望時間、生産工程の前後工程のバランス
等を考慮しながら0.5〜10重量％の範囲内で適宜
決定して用いれば良い。 In the above example, the case where the organic acids such as tannic acid and citric acid and the alkali metal chlorides such as alkali phosphates added to the NaOH aqueous solution were about 1% by weight, but the amount added is particularly The amount is not limited, and may be appropriately determined and used within the range of 0.5 to 10% by weight, taking into account the desired time required for the cleaning process, the balance between before and after the production process, etc.
また、上記実施例において、アルカリ金属水酸
化物として水酸化ナトリウムを用いた場合につい
て説明したが、本発明はこれに限定されるもので
はなく、水酸化カリウム、水酸化リチウム等を用
いても前述と全く同様の効果が得られることは明
らかである。 Further, in the above examples, the case where sodium hydroxide was used as the alkali metal hydroxide was explained, but the present invention is not limited to this, and potassium hydroxide, lithium hydroxide, etc. may also be used as described above. It is clear that exactly the same effect can be obtained.
以上説明したように本発明による受像管けい光
面の形成方法によれば、従来の弗酸水溶液を用い
て洗浄した場合の不具合点が全面的に改善され、
かつ弗酸水溶液の洗浄と同等の清浄効果が得ら
れ、高品質のけい光面が得られるという極めて優
れた効果を有する。 As explained above, according to the method for forming a fluorescent surface of a picture tube according to the present invention, the problems caused by cleaning using a conventional hydrofluoric acid aqueous solution are completely improved.
Moreover, it has an extremely excellent effect in that a cleaning effect equivalent to that of cleaning with a hydrofluoric acid aqueous solution can be obtained, and a high-quality fluorescent surface can be obtained.
第１図は本発明による受像管けい光面の形成方
法の一実施例を説明するための要部断面構成図、
第２図は本発明による受像管けい光面の形成方法
の他の実施例を説明するための要部断面構成図で
ある。
１……洗浄タンク、２……水溶液、３……パネ
ル、４……水溶液、５……タンク、６……モー
タ。
FIG. 1 is a cross-sectional configuration diagram of main parts for explaining an embodiment of a method for forming a fluorescent surface of a picture tube according to the present invention;
FIG. 2 is a cross-sectional configuration diagram of a main part for explaining another embodiment of the method for forming a fluorescent surface of a picture tube according to the present invention. 1...Cleaning tank, 2...Aqueous solution, 3...Panel, 4...Aqueous solution, 5...Tank, 6...Motor.
Claims (1)
い光体層を被着形成する工程以前にフエースプレ
ートパネルの内面を洗浄処理する受像管けい光面
の形成方法において、前記フエースプレートパネ
ルの内面洗浄液にアルカリ金属水酸化物を３〜50
重量％含有させた水溶液に、有機酸または有機酸
塩を0.5〜10重量％の範囲で添加したことを特徴
とする受像管けい光面の形成方法。 ２ 前記水溶液にアルカリ金属塩化物またはアル
カリリン酸塩を0.5〜10重量％の範囲で添加した
ことを特徴とする特許請求の範囲第１項記載の受
像管けい光面の形成方法。 ３ 前記水溶液の液温を40〜100℃の範囲とした
ことを特徴とする特許請求の範囲第１項、または
第２項記載の受像管けい光面の形成方法。 ４ 前記水溶液による洗浄中、またはその後の水
洗中に超音波を加えたことを特徴とする特許請求
の範囲第１項、第２項、または第３項記載の受像
管けい光面の形成方法。[Scope of Claims] 1. A method for forming a fluorescent surface of a picture tube in which the inner surface of the face plate panel of the picture tube is cleaned before the step of depositing and forming a phosphor layer on the inner surface of the face plate panel of the picture tube, Add 3 to 50% of alkali metal hydroxide to the panel inner surface cleaning solution.
1. A method for forming a fluorescent surface of a picture tube, comprising adding an organic acid or an organic acid salt in an amount of 0.5 to 10% by weight to an aqueous solution containing 0.5 to 10% by weight. 2. The method for forming a fluorescent surface of a picture tube according to claim 1, wherein an alkali metal chloride or an alkali phosphate is added to the aqueous solution in a range of 0.5 to 10% by weight. 3. The method for forming a fluorescent surface of a picture tube according to claim 1 or 2, characterized in that the temperature of the aqueous solution is in the range of 40 to 100°C. 4. The method for forming a fluorescent surface of a picture tube according to claim 1, 2, or 3, characterized in that ultrasonic waves are applied during washing with the aqueous solution or during subsequent washing with water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16653980A JPS5790843A (en) | 1980-11-28 | 1980-11-28 | Forming method of fluorescent screen of picture tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16653980A JPS5790843A (en) | 1980-11-28 | 1980-11-28 | Forming method of fluorescent screen of picture tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5790843A JPS5790843A (en) | 1982-06-05 |
| JPH0345503B2 true JPH0345503B2 (en) | 1991-07-11 |
Family
ID=15833151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16653980A Granted JPS5790843A (en) | 1980-11-28 | 1980-11-28 | Forming method of fluorescent screen of picture tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5790843A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0212737A (en) * | 1988-06-30 | 1990-01-17 | Nec Corp | Color cathode-ray tube panel washing device |
| JPH0722004B2 (en) * | 1989-05-15 | 1995-03-08 | 三菱電機株式会社 | Method of manufacturing projection cathode ray tube |
| JPH0554804A (en) * | 1991-08-26 | 1993-03-05 | Mitsubishi Electric Corp | Method for salvaging glass panel for use in projection type cathode-ray tube equipped with multiple interference film |
| JPH06187909A (en) * | 1992-12-15 | 1994-07-08 | Mitsubishi Electric Corp | Cleaning method for glass panel for cathode-ray tube |
| JPH07155713A (en) * | 1993-12-03 | 1995-06-20 | Hakusui Sangyo:Kk | Cleaning method of fluorescent screen of cathode-ray tube |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4510020Y1 (en) * | 1967-08-19 | 1970-05-09 |
-
1980
- 1980-11-28 JP JP16653980A patent/JPS5790843A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4510020Y1 (en) * | 1967-08-19 | 1970-05-09 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5790843A (en) | 1982-06-05 |
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