CN1027114C - 制造彩色阴极射线管屏幕的方法 - Google Patents

制造彩色阴极射线管屏幕的方法 Download PDF

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CN1027114C
CN1027114C CN91104160A CN91104160A CN1027114C CN 1027114 C CN1027114 C CN 1027114C CN 91104160 A CN91104160 A CN 91104160A CN 91104160 A CN91104160 A CN 91104160A CN 1027114 C CN1027114 C CN 1027114C
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layer
screen
ray tube
cathode ray
coated
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CN1057924A (zh
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池恒九
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Samsung SDI Co Ltd
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Samsung Display Devices Co Ltd
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    • 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
    • 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
    • H01J9/22—Applying luminescent coatings
    • H01J9/227—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines
    • H01J9/2278—Application of light absorbing material, e.g. between the luminescent areas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/18—Luminescent screens
    • H01J29/28—Luminescent screens with protective, conductive or reflective layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/86—Vessels; Containers; Vacuum locks
    • H01J29/88—Vessels; Containers; Vacuum locks provided with coatings on the walls thereof; Selection of materials for the coatings
    • 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
    • H01J9/22—Applying luminescent coatings
    • H01J9/227—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines
    • H01J9/2271—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines by photographic processes

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)

Abstract

一种制造彩色阴极射线管屏的方法，它包括下列步骤：把粘结加强层4涂覆在屏板P的屏板裙部S的内表面上；涂覆黑色阵列条2和荧光粉条1；在把薄金属膜3涂覆在最终构层之前把热分解缓和层5涂覆在屏板裙部里的所说粘结加强层4上。由于采用了包含在热分解缓和层中的丙烯乳胶而延缓了聚乙烯醇的热分解，在焙烧工序的过程中防止了薄金属膜的鼓起和脱落，由此减少了由于金属层的碎片的脱落而导致的劣质产品。

Description

本发明涉及一种制造彩色阴极射线管屏幕的方法，更具体地说，涉及一种能防止屏幕的金属膜鼓起的制造彩色阴极射线管屏的方法。
如图1所示，在彩色阴极射线管屏板的内底面上形成的屏幕具有多层的薄膜结构，它包括：在屏板P内底面上交替安排的许多红、绿和兰色的荧光粉条或点1;隔开各自邻近的不同色荧光粉条并吸收从屏板P外面进入光的黑色阵列条2;以及在该结构最外表面上形成的薄金属膜3。
在这种情况下，荧光粉条1和黑色阵列条2实际上都在同一平面上形成，并且，薄金属膜3覆盖住荧光粉条1和黑色阵列条2。在未加说明的附图中的标字“S”表示屏板的裙部。
然而，上述的多层结构是制造屏幕过程中形成的全部层中的一部分，采用燃烧处理和分解以及通过所谓的蚀刻和焙烧工艺把其余物去除掉。
现在进行更具体的说明。开始，在屏板的整个底面上涂覆预涂覆剂，并由此形成一个作为最底层的粘结加强层。尔后，在粘结加强层上涂覆一层光敏树脂膜，它是为了用光刻照相术的方法形成黑色阵列条的，然后在显影工艺中把该膜去除，显 影工艺是黑色阵列条制造工艺中的最后一道工序。
然后，在各自邻近黑色阵列条之间的空隙上交替地形成不同色的荧光粉条，此后，在它们的表面上覆盖膜剂并干燥，这样形成一膜层。然后，由铝这样金属制备的一种金属膜最后涂覆在该得到的结构上并加以覆盖。该膜层是为了防止金属膜侵入荧光粉条和改善金属膜的平滑度的。
这样半成品屏幕的膜层和最底层的粘结加强层通过在阴极射线管制造过程中的焙烧工艺而被去除掉。
在屏幕的上述制造工艺流程中的焙烧工艺中，存在使金属膜变得鼓起的影响，特别是在屏板裙部上形成的部分，即屏幕的周边部分。这个理由是，例如由于高温加热预涂覆剂的急速分解，由此产生的气体引起金属膜变得鼓起。
鼓起的金属膜可能脱落而变成碎片，该金属膜碎片成为杂质而必然保留在阴极射线管内，它们会导致电子枪之间严重打火和荫罩孔的堵塞现象。
本发明的目的是提供一种能克服上述存在问题的彩色阴极射线管屏幕的制造方法。
为了达到此目的，本发明的特征在于，在制造彩色阴极射线管屏幕的方法中有一个在最底层粘结加强层上涂覆黑色阵列条和荧光粉条的步骤，该加强层由主要成分为聚乙烯醇的预涂覆剂制成;在形成薄金属膜步骤之前有一个形成膜层的步骤;在形成薄金属膜步骤之前有一个在屏板裙部内的粘结加强层上涂覆热分解缓和层的步骤，该缓和层可缓和作为最底层粘结加 强层主要成分的聚乙烯醇的急速热分解。
在本发明中采用的这种热分解缓和层是由下列配料制备的：丙烯乳胶、2%的聚乙烯醇、草酸铵盐和纯水，按重量的大致比率为1∶1∶1∶21。而聚乙烯醇是粘结剂，丙烯乳胶可减少聚乙烯醇的热分解速度。草酸铵盐是为了在屏幕的金属膜上产生微细孔的附加成分。
图1是阴极射线管屏幕的局部放大图的屏板剖面图;
图2A至2D分别图示出按照本发明的屏幕制造过程。
现在通过实施例参照有关附图详细说明本发明。
（A）如图2A所示，用传统方法把主要成分为聚乙烯醇的最底层粘结加强层4涂覆在阴极射线管屏板P的内表面和屏板裙部S的内表面上，并且，把由石墨制备的黑色阵列条2和由各种彩色荧光粉材料组成的荧光粉条1涂覆在屏板P内表面里的粘结加强层4上。
（B）然后，如图2B所示，把热分解缓和层5涂覆到屏板P的屏板裙部S上的粘结加强层4上。这里采用的热分解缓和层的材料是下列配料的混合物：按重量比率大致为1∶1∶1∶21的丙烯乳胶、2%聚乙烯醇、草酸铵盐和纯水。在这里，聚乙烯醇作为粘结剂，丙烯乳胶减少聚乙烯醇的热分解速度。另外，作为附加成分的草酸铵盐，由于它的针状结晶结构，可在屏幕最上层的薄金属膜的外围边缘上形成许多微细孔。
（C）此外，如图2C所示，用传统方法把有机材料制备的膜层6涂覆在其面上形成了黑色阵列条2和荧光粉条1的屏板内底 面上，而不涂在其面上形成了热分解缓和层5的屏板裙部S上。
（D）如图2D所示，把由铝制备的薄金属膜层3涂覆在热分解缓和层5和膜层6的全部表面上。
（E）在完成屏幕的多层形成系列步骤之后，经过焙烧方式获得如图1所示的最终完好的屏幕。
在经过上述制造工序获得的屏幕中，最底层的粘结加强层、热分解缓和层和有机材料层通过焙烧步骤被分解成有机气体并被去除掉。通过经焙烧工序的最终屏幕的放大剖面图，可以进一步说明，上述的有机物层完全被去除掉了，并发现没有由于在屏板上特别是在屏板裙部上存在有机气体而使金属膜鼓起。
这是因为在焙烧工序中，当有机材料层经过焙烧时，由包含在热分解缓和层中的丙烯乳胶使聚乙烯醇的热分解发生出现延时。另外，因为包含在热分解缓和层中的针状结晶草酸铵盐在薄金属层上形成微细孔，在热分解过程中产生的有机气体能够容易地被排出。
如上所述，通过本发明人的重复实验，获得了用在本发明中用于热分解缓和的化学剂，并且，通过有效地防止在屏板裙部上形成的薄金属膜的鼓起和脱落，明显地减少了劣质产品。

Claims (2)

1、一种制选彩色阴极射线管屏幕的方法，包括：
(1)将主要成份是聚乙烯的粘结加强层(4)涂覆在阴极射线管屏板(P)内表面和屏板裙部5的内表面上；
(2)把黑色阵列条(2)和荧光粉条(1)涂覆在屏板(P)内壁的所述粘结加强层上；
其特征在于还包括：
(3)把包含按重量比依次约为1∶1∶21的丙烯乳胶、2%聚乙烯醇、和水的混合物的热分解缓和层(5)涂覆在屏板裙部的内表面的所述粘结加强层(4)上；
(4)把包含有机膜成形树脂的有机膜层(6)涂覆在屏幕(P)内表面的黑色阵列条(2)和荧光粉条(1)上；
(5)把金属层3涂覆在有机膜层6和热分解缓和层(5)上；
(6)把最终的构层熔烧，由此去除掉所述的粘结加强层(4)、有机膜层(6)及热分解缓和层(5)。
2、根据权利要求1用于制造彩色阴极射线管屏幕的方法，其特征在于：所述热分解缓和（5）层还包括重量比近似于丙烯乳胶的草酸铵盐。
CN91104160A 1990-07-04 1991-06-20 制造彩色阴极射线管屏幕的方法 Expired - Fee Related CN1027114C (zh)

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KR1019900010099A KR930001187B1 (ko) 1990-07-04 1990-07-04 칼라 음극선관의 스크린 제조방법
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KR950004395B1 (ko) * 1992-12-16 1995-04-28 삼성전관주식회사 개선된 스크린을 갖는 칼라 음극선관과 그 제조 방법
US20090306027A1 (en) * 2006-04-10 2009-12-10 Nitomed, Inc. Genetic risk assessment in heart failure: impact of the genetic variation of g-protein beta 3 subunit polymorphism
CN103242837B (zh) * 2013-05-23 2015-05-27 北京化工大学 具有晶面取向性的多酸微纳米晶体荧光薄膜及其制备方法

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US3940508A (en) * 1974-09-16 1976-02-24 Westinghouse Electric Corporation Precoating color television picture tube faceplate panels to promote phosphor pattern adherence
JPS5596536A (en) * 1979-01-19 1980-07-22 Hitachi Ltd Fluorescent face forming method
US4339475A (en) * 1979-03-23 1982-07-13 Hitachi, Ltd. Method of forming a fluorescent screen for cathode-ray tube
FR2622050B1 (fr) * 1987-10-20 1990-01-26 Videocolor Procede de metallisation d'un ecran luminescent

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CN1057924A (zh) 1992-01-15
US5326588A (en) 1994-07-05
KR930001187B1 (ko) 1993-02-20

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Granted publication date: 19941221