JPS634533A - Manufacture of fluorescent screen - Google Patents

Manufacture of fluorescent screen

Info

Publication number
JPS634533A
JPS634533A JP14856886A JP14856886A JPS634533A JP S634533 A JPS634533 A JP S634533A JP 14856886 A JP14856886 A JP 14856886A JP 14856886 A JP14856886 A JP 14856886A JP S634533 A JPS634533 A JP S634533A
Authority
JP
Japan
Prior art keywords
lid
panel
screen
valve
space
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.)
Pending
Application number
JP14856886A
Other languages
Japanese (ja)
Inventor
Shinichiro Takaoka
高岡 真一郎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP14856886A priority Critical patent/JPS634533A/en
Publication of JPS634533A publication Critical patent/JPS634533A/en
Pending legal-status Critical Current

Links

Landscapes

  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)

Abstract

PURPOSE:To reduce the drying time, by arranging a vacuum drying process in the formation of a flurescent screen. CONSTITUTION:A lid 1 with a form closely contacted to a panel 4 is connected to a vacuum pump 2, and moved by cylinders 3. The lid 1 is squeezed to the panel 4 whose screen thickness is made even by a high-speed rotation, and a valve 5 is opened to evacuate the air and the steam in a space 10 formed by the panel 4 and the lid 1. In this case, when the air pressure at the space 10 is made below the saturated vapor pressure, the moisture in a fluorescent screen 7 is vaporized, and the screen is dried. When the process is completed, the valve 5 is closed, a leak valve 6 is opened, and the lid 1 is moved backward. By applying a vacuum drying in such a way, the equipment is rationalized and the drying time can be reduced up to about one and half minutes from seven minutes in the conventional way.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、スラリー法によりカラーブラウン管蛍光膜の
製作方法に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a color cathode ray tube fluorescent film by a slurry method.

〔従来の技術〕[Conventional technology]

カラーブラウン管の蛍光面製作方法として、例えば次の
ような方法が用いらている。パネル内面を弗酸、水等で
清浄後、ポリビニルアルコールと重クロム酸ナトリウム
を主成分とするフオトレジス1〜を塗布し、高速回転に
よりパネル内面におけるフォトレジストの膜厚を−・様
のものにし、遠赤外線ヒータ、ニアブロワ−等で乾燥さ
せ、パネルにシャドウマスクを装着して緑、青、赤の各
蛍光体が付着する位置を露光する。次に水で現像し、露
光していない部分のフォトレジストを除去し、黒鉛を塗
布、乾燥し、過酸化水素水を主成分とする液でエツチン
グし、水洗いを行う。これらの工程を経て、緑、青、赤
蛍光体が付着する部分以外に黒鉛が付着した、いわゆる
ブラックマトリクス1漠が形成される。この後、ポリビ
ニルアルコール水溶液に重クロム酸アンモニウム溶液を
加えた液に、線蛍光体の懸濁させたスラリーを塗布、乾
燥し、所定のシャドウマスクを装着して露光を行い、温
水で現像して所定の位置に緑蛍光体パターンな形成する
。青、赤蛍光体についても同様にパターンを形成後、フ
ィルミング液を塗布乾燥し、フィミング1摸を形成して
蛍光面が完成する。
For example, the following method is used to manufacture the phosphor screen of a color cathode ray tube. After cleaning the inner surface of the panel with hydrofluoric acid, water, etc., apply photoresist 1~ containing polyvinyl alcohol and sodium dichromate as main components, and make the photoresist film thickness on the inner surface of the panel similar to - by rotating at high speed. The panel is dried using a far-infrared heater, a near blower, etc., and a shadow mask is attached to the panel to expose the positions where the green, blue, and red phosphors are to be attached. Next, it is developed with water to remove the photoresist in the unexposed areas, coated with graphite, dried, etched with a solution containing hydrogen peroxide as its main component, and washed with water. Through these steps, a so-called black matrix is formed in which graphite is attached to areas other than those to which the green, blue, and red phosphors are attached. After this, a slurry containing a suspended linear phosphor is applied to a polyvinyl alcohol aqueous solution and an ammonium dichromate solution, dried, exposed to light with a prescribed shadow mask attached, and developed with warm water. Form a green phosphor pattern at a predetermined position. After forming patterns in the same manner for the blue and red phosphors, a filming liquid is applied and dried to form one copy of the filming to complete the phosphor screen.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

上述のように、蛍光膜の形成工程には数回の乾燥工程が
含まれるが、従来は回転、遠赤外線ヒー夕、ニアブロワ
−等を組合わせてこれを行っている。このため、乾燥時
間の総計は7分以上にもなり、また、ヒータ温度、ブロ
ワ−風量等について細かな調節を要した。
As mentioned above, the process of forming a fluorescent film includes several drying steps, which are conventionally carried out using a combination of rotation, far-infrared heaters, near blowers, etc. Therefore, the total drying time was 7 minutes or more, and detailed adjustments were required for the heater temperature, blower air volume, etc.

〔問題点を解決するための手段〕[Means for solving problems]

本発明は、カラーブラウン管の蛍光膜の形成工程に真空
乾燥を導入することにより、コントロールが容易で、か
つ短時間での乾燥を実現しようとするものである。
The present invention aims to realize drying that is easy to control and takes a short time by introducing vacuum drying into the process of forming the fluorescent film of a color cathode ray tube.

〔実施例] 次に、本発明について、実施例を用いて説明する。第1
図は本発明の実施例の概略図である。1はパネルに密着
する形状の蓋で、真空ポンプ2に接続され、シリンダ3
により移動する。高速回転により膜厚を均一にしたパネ
ル4に、蓋1を圧し着け、弁5を開放し真空ポンプ2に
よりパネル4と蓋1による空間10の空気、水蒸気を排
気する。
[Example] Next, the present invention will be described using an example. 1st
The figure is a schematic diagram of an embodiment of the invention. 1 is a lid that fits closely to the panel, is connected to the vacuum pump 2, and is connected to the cylinder 3.
Move by. A lid 1 is pressed onto a panel 4 whose film thickness has been made uniform by high-speed rotation, a valve 5 is opened, and air and water vapor in a space 10 between the panel 4 and the lid 1 are evacuated by a vacuum pump 2.

このとき空間10の気圧が飽和蒸気圧3示になると、蛍
光膜7中の水が気化し、膜が乾燥される。
At this time, when the atmospheric pressure in the space 10 reaches a saturated vapor pressure of 3, the water in the fluorescent film 7 is vaporized and the film is dried.

完了時は弁5を閉鎖、リーク弁6を開き、蓋1を後退さ
せる。14吋パネルの場合を例にとると、乾燥工程で1
 、5 mg/cm2総量1.41g(塗布面積938
c+a2)の水を除去することが粂件となっている。第
2図の曲線21は温度に対する飽和蒸気圧3示したもの
で、単位はkPa (1キロパスカル=7.5Torr
)である。パネル温度30°C−定とすれば、飽和蒸気
圧は4.241kPa (31,8Torr)になる。
Upon completion, the valve 5 is closed, the leak valve 6 is opened, and the lid 1 is moved back. For example, in the case of a 14-inch panel, 1
, 5 mg/cm2 total amount 1.41 g (applied area 938
It is important to remove the water in c+a2). Curve 21 in Figure 2 shows the saturated vapor pressure 3 versus temperature, and the unit is kPa (1 kilopascal = 7.5 Torr).
). If the panel temperature is constant at 30°C, the saturated vapor pressure will be 4.241 kPa (31.8 Torr).

使用するポンプを排気速度V s (e / m i 
n > 、回転数R(rpm)の回転ポンプとし、空間
10の容積をV丁とすると、排気速度Vs−定の範囲で
あるから、を秒後の圧力は次式で表される。
The pump used is pumped at the pumping speed V s (e/m i
n>, the rotation speed R (rpm) is a rotary pump, and the volume of the space 10 is V, the pumping speed is within a constant range of Vs, so the pressure after Vs is expressed by the following equation.

第2図の曲線22は、’v’ s = 3001 、/
’ m i n(5e 、、’ S ) 、 R= 4
20 r p m 、V T = 51’ 。
Curve 22 in FIG. 2 shows 'v' s = 3001, /
'min(5e,,'S), R=4
20 rpm, V T = 51'.

初期圧力Po=101.325kPa (標準大気圧)
としたときの圧力変化を時間軸と左向きにとって表した
もので、3.4秒後に4.240KPaに達する。この
後は水蒸気により圧力は4.241 kPa−定で排気
するとみなせる。30°Cにおいては、水蒸気の密度は
30.37rag、/eであるから、1.41gの水蒸
気の体積は46.4gとなり、V s = 51 、/
 sより9.3秒間で排気される。したがって、3.4
+9.3=12.7秒排気すればよい。以上の計算に基
づき実験を行ない、蛍光膜の水分量を測定した結果、1
.44J、101112の水が除去された。
Initial pressure Po=101.325kPa (standard atmospheric pressure)
This graph shows the pressure change when the pressure changes to the left with respect to the time axis, and reaches 4.240 KPa after 3.4 seconds. After this, it can be assumed that the pressure is 4.241 kPa-constant and exhausted due to water vapor. At 30°C, the density of water vapor is 30.37 rag, /e, so the volume of 1.41 g of water vapor is 46.4 g, and V s = 51, /
It is exhausted in 9.3 seconds from s. Therefore, 3.4
It is sufficient to exhaust the air for +9.3=12.7 seconds. Based on the above calculations, we conducted an experiment and measured the moisture content of the fluorescent film.
.. 44 J, 101,112 of water was removed.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、本発明によるカラー受像管の蛍光
膜の製作方法は、真空乾燥を利用することにより、設偏
を合理化し、また乾燥時間を従来の7分から1分半程度
に短縮できる効果がある。
As explained above, the method of manufacturing a phosphor film for a color picture tube according to the present invention has the advantage of rationalizing the installation process and shortening the drying time from the conventional 7 minutes to about 1 and a half minutes by using vacuum drying. There is.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明に用いる乾燥装置の概略図、第2図は圧
力線図である。 1・・・蓋、2・・・真空ポンプ、3・・シリンダ、4
・・・パネル、5・・・弁、6・・・リーク弁、7・・
・蛍光膜、10・・・パネルと蓋による空間。
FIG. 1 is a schematic diagram of a drying apparatus used in the present invention, and FIG. 2 is a pressure diagram. 1...Lid, 2...Vacuum pump, 3...Cylinder, 4
...Panel, 5...Valve, 6...Leak valve, 7...
- Fluorescent film, 10...Space created by panel and lid.

Claims (1)

【特許請求の範囲】[Claims] カラー受像管の蛍光膜の形成において、真空乾燥の工程
を含むことを特徴とする蛍光膜の製作方法。
A method for producing a phosphor film for a color picture tube, the method comprising the step of vacuum drying.
JP14856886A 1986-06-24 1986-06-24 Manufacture of fluorescent screen Pending JPS634533A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14856886A JPS634533A (en) 1986-06-24 1986-06-24 Manufacture of fluorescent screen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14856886A JPS634533A (en) 1986-06-24 1986-06-24 Manufacture of fluorescent screen

Publications (1)

Publication Number Publication Date
JPS634533A true JPS634533A (en) 1988-01-09

Family

ID=15455653

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14856886A Pending JPS634533A (en) 1986-06-24 1986-06-24 Manufacture of fluorescent screen

Country Status (1)

Country Link
JP (1) JPS634533A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63136440A (en) * 1986-11-26 1988-06-08 Sony Corp Drying method in fluorescent screen forming process
JPH01255127A (en) * 1988-04-01 1989-10-12 Nec Kansai Ltd Method for forming fluorescent screen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63136440A (en) * 1986-11-26 1988-06-08 Sony Corp Drying method in fluorescent screen forming process
JPH01255127A (en) * 1988-04-01 1989-10-12 Nec Kansai Ltd Method for forming fluorescent screen

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