KR910007734B1 - Forming method for a flourescent screen for color crt - Google Patents

Forming method for a flourescent screen for color crt Download PDF

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KR910007734B1
KR910007734B1 KR1019890003544A KR890003544A KR910007734B1 KR 910007734 B1 KR910007734 B1 KR 910007734B1 KR 1019890003544 A KR1019890003544 A KR 1019890003544A KR 890003544 A KR890003544 A KR 890003544A KR 910007734 B1 KR910007734 B1 KR 910007734B1
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film
fluorescent
ray tube
cathode ray
hydrogen peroxide
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KR1019890003544A
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KR900015219A (en
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김현상
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삼성전관 주식회사
김정배
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00Apparatus 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
    • H01J9/20Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel

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

Abstract

A fluorescent film of a color cathode ray tube is formed by (a) coating an undercoating liquor, a fluorescent, a hydrogen peroxide (H2O2) and a filming liquor in order on the inner side of the panel, (b) depositing an aluminium on the film layer, and (c) firing the fluorescent film. The hydrogen peroxide improves a flatness of the CRT.

Description

칼라음극선관 형광막 형성방법Color cathode ray tube fluorescent film formation method

제1도는 칼라음극선관의 스크린막을 과장되게 그린 단면도.1 is a cross-sectional view of the color film of the color cathode ray tube exaggeratedly drawn.

제2도는 스크린막의 일부 확대 단면도.2 is a partially enlarged cross-sectional view of the screen film.

제3도는 본 발명에 의한 스크린막의 일부 확대 단면도.3 is a partially enlarged cross-sectional view of the screen film according to the present invention.

제4도는 종래 형광막 형성공정 순서도.4 is a flow chart of a conventional fluorescent film formation process.

제5도는 본 발명의 형광막 형성공정 순서도.5 is a flowchart illustrating a process for forming a fluorescent film of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

10 : 패널 20 : 블랙 매트릭스10 panel 20 black matrix

30 : 형광 스트라이프 40 : 필름층30: fluorescent stripe 40: film layer

50 : 알미늄 증착막50: aluminum vapor deposition film

본 발명은 칼라음극선관의 형광막 형성방법에 관한 것으로서, 상세하게는 형광막 표면에 증착되는 알미늄 증착막의 부분적인 들뜸을 방지할 수 있도록 하기 위한 것이다.The present invention relates to a method for forming a fluorescent film of a color cathode ray tube, and in particular, to prevent partial lifting of an aluminum deposited film deposited on a surface of a fluorescent film.

칼라음극선관의 스크린면에는 제1도에 도시된 패널(10) 전면으로부터의 외광(外光)을 일부 흡수함과 아울러 각색의 형광 스트라이프(30)간을 구분하여 주는 블랙 매트릭스(20)가 형성되어 있으며, 필름층(40)과 알미늄 증착막(50)이 그 상부에 적층 형성되어 있다.A black matrix 20 is formed on the screen surface of the color cathode ray tube to absorb some external light from the front surface of the panel 10 shown in FIG. 1 and to distinguish between the fluorescent strips 30 of different colors. The film layer 40 and the aluminum vapor deposition film 50 are laminated | stacked and formed on the upper part.

그러나 상기의 필름층(40)은 형광막 형성공정중에 일시적으로 형성되었다가 알미늄 증착막(50)이 형성된 후에 이루어지는 형광막 소성공정을 통하여 제거되는 것으로서 최종적으로 알미늄 증착막(50)과 형광 스트라이프(30) 사이에 미세한 갭(GAP)이 형성되게 하는 것이다. 이 필름층(40)은 알미늄 증착막(50)이 형성되기 전에 미리 형광체 스트라이프(30)와 블랙 매트릭스(20)의 상부에 보호막으로서 입혀지는 것인 바, 알미늄이 증착될 때에 알미늄증기(蒸氣)가 형광 스트라이프(30)와 블랙 매트릭스(20)로 침입하는 것을 방지하기 위한 것이며, 나아가서는 증착 알미늄의 부착력을 강화시키기 위한 것이다. 또한 제2도에 도시된 바와 같이 표면이 매우 거칠게 형성된 형광 스트라이프(30)과 블랙 매트릭스(20)의 상층에 알미늄이 증착되기 전에 알미늄 증착면의 평활도를 향상시킴으로써 후에 입혀지는 알미늄 증착막(50)의 표면을 고르게 하기 위함에 또 하나의 목적이 있다. 이러한 필름층(40)은 전기한 바와 같이 알미늄 증착막(50)이 형성된 후에 소성공정을 통하여 제거되는 바, 결과적으로 알미늄 증착막(50)과 형광 스트라이프(30)층 사이에 미세한 틈새를 남기게 되는 것이다. 이러한 틈새는 알미늄 증착막(50)을 통과하여 형광스트라이프(30) 표면에서 일부 반사된 전자빔이 산란하는 구역으로서 형광 스트라이프(30)에 대하여 전자빔이 약간 분산된 채 입사되도록 하는 역할을 한다. 그러나 이러한 틈새가 너무 크고 넓을 경우에는 형광 스트라이프(30)층에 대하여 증착막의 박리현상이 야기되는데 알미늄 증착막(50)과 형광 스트라이프(30) 및 블랙 매트릭스(20)과 직접 부착되는 부위가 골고루 산재해 있지 않을 경우에 발생되는 것이다. 이러한 원인은 제2도에 도시된 바와 같이 형광 스트라이프(30)와 블랙 매트릭스(20)에 의해 형성되는 표피층의 평활도가 매우 불량할 경우 이에 형성되는 필름층(40)의 두께가 매우 불균일하게 되어서 장차 형성될 갭의 크기가 너무 크고 넓게 되기 때문인 것이다.However, the film layer 40 is temporarily formed during the process of forming the fluorescent film and then removed through the process of firing the fluorescent film after the aluminum deposition film 50 is formed. Finally, the aluminum deposition film 50 and the fluorescent stripe 30 are removed. The fine gap GAP is formed therebetween. The film layer 40 is coated as a protective film on the phosphor stripe 30 and the black matrix 20 in advance before the aluminum deposition film 50 is formed. When aluminum is deposited, aluminum vapor is deposited. In order to prevent the intrusion into the fluorescent stripe 30 and the black matrix 20, and to enhance the adhesion of the deposited aluminum. In addition, as shown in FIG. 2, the surface of the aluminum deposition film 50 coated later by improving the smoothness of the aluminum deposition surface before the deposition of aluminum on the upper surface of the fluorescent matrix 30 and the black matrix 20 having a very rough surface is formed. Another purpose is to level the surface. As described above, the film layer 40 is removed through the firing process after the aluminum deposition film 50 is formed. As a result, a small gap is left between the aluminum deposition film 50 and the fluorescent stripe 30 layer. The gap is a region where the electron beam partially reflected from the surface of the fluorescent stripe 30 through the aluminum deposition film 50 is scattered, and serves to allow the electron beam to be slightly dispersed with respect to the fluorescent stripe 30. However, if the gap is too large and wide, the deposition of the deposited film is caused to the fluorescent stripe 30 layer. The portions directly attached to the aluminum deposited film 50, the fluorescent stripe 30, and the black matrix 20 are evenly scattered. If not, it will occur. This is because, as shown in FIG. 2, when the smoothness of the skin layer formed by the fluorescent stripe 30 and the black matrix 20 is very poor, the thickness of the film layer 40 formed thereon becomes very uneven. This is because the size of the gap to be formed is too large and wide.

즉 알미늄 증착막(50)이 형광 스트라이프(30)와 블랙 매트릭스(20)의 표피층에 대하여 고른 분포상태로서 부착되어야만 하는데 그렇지 못할 경우에 알미늄 증착막의 박리현상이 야기된다. 이와 같이 되면 음극선관의 화질불량은 물론 음극선관 자체의 불량화가 초래되는데 예를들어 휘도불량, 관내의 이물질 불량이 이의 대표적인 양태인 것이다.That is, the aluminum deposition film 50 should be attached evenly with respect to the skin layer of the fluorescent stripe 30 and the black matrix 20, otherwise the peeling phenomenon of the aluminum deposition film is caused. In this case, the poor quality of the cathode ray tube as well as the deterioration of the cathode ray tube itself are caused. For example, the poor luminance and the foreign matter in the tube are representative examples thereof.

본 발명은 형광 스트라이프 및 블랙 매트릭스의 표피층과 알미늄 증착막과의 부착상태를 매우 고르게 하여 상기와 같은 문제점을 개선할 수 있는 칼라음극선관의 형광막 형성방법을 제공함에 그 목적이 있다.SUMMARY OF THE INVENTION An object of the present invention is to provide a method for forming a fluorescent film of a color cathode ray tube, which can improve the above problems by uniformly adhering the adhesion state between the epitaxial layer of the fluorescent stripe and the black matrix and the aluminum deposition film.

상기의 목적을 달성하기 위하여 본 발명은, 형광막 형성 공정중, 형광체 도포공정과 필름막 형성공정 사이에 형광 스트라이프와 블랙 매트릭스의 표피층의 평활도를 향상시키기 위하여 소정의 부식액을 통한 평활도향상공정을 마련함에 그 특징이 있다.In order to achieve the above object, the present invention is to provide a smoothness improvement process through a predetermined corrosion solution in order to improve the smoothness of the skin layer of the fluorescent stripe and the black matrix between the phosphor coating process and the film film forming process. It has its features.

이하 첨부된 도면을 참조하면서 본 발명을 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

우선 본 발명에 의한 형광막 형성공정 중 그 일부의 순서를 살펴보면, 제5도에 도포된 바와 같이 패널내면에 대한 하도액도포공정→형광체도포공정→과산화수소(H2O2)도포공정→필르밍액도포→막검사→알미늄 증착의 순서로 이루어지며 이에 이어서는 형광막소성공정이 이루어진다. 즉 본 발명을 제4도에 도시된 종래공정순서와 대비하여 보면 과산화수소도포공정을 포함하게 되는데 이는 약 0.5∼5% 과산화수소의 부식성을 이용한 것으로서 과산화수소말고도 다른 부식성약제로서도 가능할 것이다. 이와 같이 과산화수소와 같은 부식액을 형광 스트라이프(30)와 블랙 매트릭스(20)의 표피층에 적정량 도포하게 되면 표피층의 일부가 용해 되는데 특히 표면으로부터 두드러지게 돌출된 부위가 깎여지게 된다. 결과적으로 상기 표피층을 평활도가 제3도에 도시된 바와 같이 향상되어 그의 상층에 형성되는 필름층의 두께가 고르게 되며 결과적으로 알미늄 증착막(50)과 표피층(30b)간의 갭이 고르게 되며 아울러 이들 양자간의 부착부위의 분포가 고르게 확산된다.First, a part of the process of forming a fluorescent film according to the present invention will be described. As shown in FIG. 5, the coating process for the inner surface of the panel, the phosphor coating step, the phosphor coating step, and the hydrogen peroxide (H 2 O 2 ) coating step Coating → film inspection → aluminum deposition followed by a fluorescent film firing process. In other words, the present invention includes a hydrogen peroxide coating process as compared to the conventional process sequence shown in FIG. 4, which may be used as a corrosive agent other than hydrogen peroxide as using about 0.5 to 5% of hydrogen peroxide. When a proper amount of a corrosion solution such as hydrogen peroxide is applied to the epidermal layers of the fluorescent stripe 30 and the black matrix 20, a part of the epidermal layer is dissolved, and a part prominently protruding from the surface is cut. As a result, the smoothness of the skin layer is improved as shown in FIG. 3, so that the thickness of the film layer formed on the upper layer is even. As a result, the gap between the aluminum deposition film 50 and the skin layer 30b becomes even, and both The distribution of attachment sites is evenly spread.

이러한 본 발명에 의하면 전기한 바와 같이 표피층과 알미늄 증착막간의 갭의 산포가 줄어들게 됨으로써 전자빔이 산란되는 공간의 폭이 고르게 되어 전부분에서의 빔산란 효과가 고르게 되며, 포피층으로부터의 증착막의 박리현상이 일어나지 않게 된다.According to the present invention, as described above, the dispersion of the gap between the epidermal layer and the aluminum deposition film is reduced, so that the width of the space where the electron beam is scattered is uniform, so that the beam scattering effect is uniform in all parts, and the peeling phenomenon of the deposition film from the foreskin layer is improved. It won't happen.

따라서 본 발명에 의하면 음극선관의 불량화의 한 요인이 크게 저감됨으로써 제품 불량화에 따른 경비손실이 줄어들게 되며, 전 화면에 있어서 매우 고른 밝기를 가진 음극선관을 기대할 수 있게 됨으로써 칼라음극선관의 품질향상을 기할 수 있게 된다.Therefore, according to the present invention, one factor of the deterioration of the cathode ray tube is greatly reduced, thereby reducing the cost loss due to the deterioration of the product, and the quality of the color cathode ray tube can be improved by being able to expect a cathode ray tube having a very uniform brightness in all screens. You will be able to.

Claims (3)

형광막을 칼라음극선관의 패널 내면에 형성하기 위한 공정중, 형광체도포공정에 이어 필름막 형성공정에 앞서서 소정의 부식성 액체에 의한 평활도 향상공정을 포함하는 것을 특징으로 하는 칼라음극선관의 형광막 형성방법.A process for forming a fluorescent film on a panel inner surface of a color cathode ray tube, the method comprising: a step of improving the smoothness by a predetermined corrosive liquid, followed by a phosphor coating step, followed by a film forming step. 제1항에 있어서, 평활도 향상을 위한 부식성 액체가 과산화수소(H2O2)인 것을 특징으로 하는 칼라음극선관의 형광막 형성방법.The method for forming a fluorescent film of a color cathode ray tube according to claim 1, wherein the corrosive liquid for improving smoothness is hydrogen peroxide (H 2 O 2 ). 제2항에 있어서, 상기 과산화수소의 농도를 0.5∼5%의 범위로 하는 것을 특징으로 하는 칼라음극선관의 형광막 형성방법.The method for forming a fluorescent film of a color cathode ray tube according to claim 2, wherein the concentration of hydrogen peroxide is in a range of 0.5 to 5%.
KR1019890003544A 1989-03-21 1989-03-21 Forming method for a flourescent screen for color crt KR910007734B1 (en)

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