JPH06333516A - Cathode-ray tube - Google Patents

Cathode-ray tube

Info

Publication number
JPH06333516A
JPH06333516A JP11939993A JP11939993A JPH06333516A JP H06333516 A JPH06333516 A JP H06333516A JP 11939993 A JP11939993 A JP 11939993A JP 11939993 A JP11939993 A JP 11939993A JP H06333516 A JPH06333516 A JP H06333516A
Authority
JP
Japan
Prior art keywords
funnel
oxide
conductive film
melting point
low melting
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
JP11939993A
Other languages
Japanese (ja)
Inventor
Shozo Aoyama
省三 青山
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.)
Toshiba Corp
Original Assignee
Toshiba 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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP11939993A priority Critical patent/JPH06333516A/en
Publication of JPH06333516A publication Critical patent/JPH06333516A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To reduce the generation of a defect owing to the removal of a conductive film, by including at least graphite, ferric oxide, alkaline silicate, and a low melting point glass melted at the temperature less than a specific value, as the components in a conductive membrane, and including the low melting point glass at a specific wt.% to the total weight of the other components. CONSTITUTION:A conductive membrane 13f at the large diameter part 12 of a funnel 2 includes at least graphite, ferric oxide, and alkaline silicate as a binder, and it has a thermal expansion coefficient near the thermal expansion coefficient of the funnel 2 made of glass. And the conductive membrane 13f includes a low melting point glass which consists of one sort or more of oxides selected from lead oxide, zinc oxide, bromine oxide, bismuth oxide, lithium oxide, and silicon dioxide, which are melted at a temperature less than 450 deg.C. The including amount of the low melting point glass component is 3 to 20wt.% to the total weight of the other components. The conductive membrane 13f is produced by scattering the minute particles of the graphite, the ferric oxide, the titanium oxide, and the like, and the minute particles of the low melting point glass, in the alkaline silicate water solution. The removal of the conductive membrane can be prevented consequently.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、カラー受像管などの
陰極線管に係り、特にそのファンネルの径大部およびネ
ックの内面に塗布形成される導電膜の剥落を防止した陰
極線管に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cathode ray tube such as a color picture tube, and more particularly to a cathode ray tube in which a conductive film formed by coating on a large diameter portion of a funnel and an inner surface of a neck is prevented from peeling off.

【0002】[0002]

【従来の技術】一般にカラー受像管などの陰極線管は、
パネルおよびこのパネルと一体の漏斗状ファンネルから
なるバルブを有し、そのファンネルの径大部およびネッ
クの径大部隣接部の内面に導電膜が塗布形成されてい
る。そしてこの導電膜を介して、ネック内に配設された
電子銃やパネルの内面に設けられた蛍光体スクリーン、
その内側のシャドウマスクなどに、ファンネルの径大部
に設けられた陽極端子に印加される高電圧を供給し、か
つファンネルの内側に電子銃から放出される電子ビーム
を加速する高電界を形成する構造に形成されている。
2. Description of the Related Art Generally, cathode ray tubes such as color picture tubes are
A valve having a panel and a funnel-shaped funnel integral with the panel is provided, and a conductive film is applied and formed on the inner surface of the large-diameter portion of the funnel and the adjacent large-diameter portion of the neck. And, through this conductive film, an electron gun disposed in the neck and a phosphor screen provided on the inner surface of the panel,
A high voltage applied to the anode terminal provided in the large-diameter portion of the funnel is supplied to the shadow mask inside thereof, and a high electric field that accelerates the electron beam emitted from the electron gun is formed inside the funnel. Is formed into a structure.

【0003】この導電膜は、ファンネルの径大部および
ネックの内面を洗浄し乾燥したのち、導電塗料を塗布す
ることにより形成される。その導電塗料として、従来よ
り各種組成成分のものがあるが、ファンネルの径大部内
面については、フラッシュオーバー電流を抑制するた
め、黒鉛、酸化第二鉄、酸化チタンの微粒子、結着剤と
して珪酸アルカリ水溶液(水ガラス)を所定の割合いで
混合した分散液からなる導電塗料が用いられ、刷毛塗
り、スプレーなどの方法により塗布されている。このフ
ァンネルの径大部内面の導電膜は、比較的高抵抗の導電
膜となる。またネック内面については、上記分散液から
酸化チタンを除いた導電塗料が用いられ、スポンジ刷毛
塗り、スプレー、フローコートなどの方法により塗布さ
れている。このネック内面の導電膜は、比較的低抵抗の
導電膜となる。
The conductive film is formed by cleaning the large diameter portion of the funnel and the inner surface of the neck, drying the conductive material, and then applying a conductive paint. As the conductive paint, there are various composition components from the past, but on the inner surface of the large-diameter part of the funnel, graphite, ferric oxide, titanium oxide particles, and silicic acid as a binder are used to suppress flashover current. A conductive paint composed of a dispersion liquid in which an alkaline aqueous solution (water glass) is mixed at a predetermined ratio is used, and is applied by a method such as brush coating or spraying. The conductive film on the inner surface of the large-diameter portion of the funnel becomes a conductive film having a relatively high resistance. On the inner surface of the neck, a conductive coating material obtained by removing titanium oxide from the above dispersion liquid is used, and is applied by a method such as sponge brush coating, spraying or flow coating. The conductive film on the inner surface of the neck becomes a conductive film having a relatively low resistance.

【0004】ところで、カラー受像管は、ファンネルの
径大部およびネックの内面に上記方法により導電塗料を
塗布し乾燥して導電膜を形成したのち、その径大部のパ
ネルとの接合端面(封着面)を洗浄し、この接合端面に
はんだガラスを塗布する。そして内面に蛍光体スクリー
ンが形成され、その内側にシャドウマスクが装着された
パネルと組合わせて、大気雰囲気の封着炉に入れ、40
0℃前後の温度で約40〜60分加熱して、導電膜中の
水分や蒸発成分を除去し、ファンネルの径大部端面に塗
布したはんだガラスによりパネルとファンネルとを接合
する。その後、この接合されたパネルとファンネルから
なるバルブのネック内に電子銃を封止し、排気し、さら
にゲッターフラッシュ、エージング、耐電圧処理などの
工程を経て形成される。
By the way, in a color picture tube, a conductive paint is applied to the large-diameter portion of the funnel and the inner surface of the neck by the above method and dried to form a conductive film. Wash the surface) and apply solder glass to the joint end surface. Then, the phosphor screen is formed on the inner surface, and the phosphor screen is combined with the panel on which the shadow mask is attached, and the phosphor screen is placed in an air-sealing furnace.
It is heated at a temperature of about 0 ° C. for about 40 to 60 minutes to remove water and evaporation components in the conductive film, and the panel and the funnel are joined by the solder glass applied to the end surface of the large-diameter portion of the funnel. After that, the electron gun is sealed in the neck of the bulb made up of the joined panel and funnel, exhausted, and further subjected to steps such as getter flash, aging, and withstand voltage treatment.

【0005】しかし上記のようにファンネルの径大部お
よびネックの内面に塗布形成される導電膜は、ファンネ
ル内面の洗浄状態、洗浄後の乾燥状態、乾燥温度、導電
塗料の各成分の分散状態、塗布膜の膜厚、塗布密度など
の各種条件のばらつきにより、接着強度が変化する。そ
のため、カラー受像管の製造工程あるいは管完成後に衝
撃を受けたり、カラー受像管の製造工程中に他の部材と
接触したりすると剥落し、その剥落片や剥落粒子が電子
銃に付着して、耐電圧特性を劣化したり、シャドウマス
クに付着して電子ビーム通過孔の目詰まり原因となる。
However, the conductive film formed by coating on the large-diameter portion of the funnel and the inner surface of the neck as described above has a cleaning state of the inner surface of the funnel, a dry state after cleaning, a drying temperature, a dispersed state of each component of the conductive paint, The adhesive strength changes due to variations in various conditions such as the thickness of the coating film and the coating density. Therefore, if it receives an impact after the manufacturing process of the color picture tube or after the tube is completed, or if it comes into contact with other members during the manufacturing process of the color picture tube, it will peel off, and the flakes and particles will adhere to the electron gun, The withstand voltage characteristics may be deteriorated, and the electron beam passage holes may be clogged by being attached to the shadow mask.

【0006】[0006]

【発明が解決しようとする課題】上記のように、カラー
受像管などの陰極線管のファンネルの径大部およびネッ
クの径大部隣接部の内面には、導電膜が塗布形成されて
いる。その導電膜は、ファンネルの径大部内面について
は、黒鉛、酸化第二鉄、酸化チタンの微粒子、結着剤と
して珪酸アルカリ水溶液を所定の割合いで混合した分散
液からなる導電塗料を刷毛塗り、スプレーなどの方法に
より塗布することにより形成されている。またネック内
面については、上記分散液から酸化チタンを除いた分散
液からなる導電塗料を、スポンジ刷毛塗り、スプレー、
フローコートなどの方法により塗布することにより形成
されている。
As described above, the conductive film is formed by coating on the inner surfaces of the large diameter portion of the funnel and the large diameter portion of the neck of the cathode ray tube such as a color picture tube. The conductive film is, on the inner surface of the large-diameter portion of the funnel, brushed with a conductive paint comprising a dispersion liquid in which graphite, ferric oxide, titanium oxide fine particles, and an alkaline silicate aqueous solution as a binder are mixed at a predetermined ratio, It is formed by applying by a method such as spraying. Further, for the inner surface of the neck, a conductive paint comprising a dispersion obtained by removing titanium oxide from the above dispersion, sponge brush coating, spraying,
It is formed by applying by a method such as flow coating.

【0007】しかし上記のようにファンネルの径大部お
よびネックの内面に塗布形成される導電膜は、ファンネ
ル内面の洗浄状態、洗浄後の乾燥状態、乾燥温度、導電
塗料の各成分の分散状態、塗布膜の膜厚、塗布密度など
の各種条件のばらつきにより、接着強度が変化する。そ
のため、カラー受像管の製造工程あるいは管完成後に衝
撃を受けたり、カラー受像管の製造工程中に他の部材と
接触したりすると剥落し、その剥落片や剥落粒子が電子
銃に付着して耐電圧特性を劣化したり、シャドウマスク
に付着して電子ビーム通過孔の目詰まり原因となるなど
の問題がある。
However, as described above, the conductive film applied and formed on the large-diameter portion of the funnel and the inner surface of the neck has a cleaning state of the inner surface of the funnel, a drying state after washing, a drying temperature, a dispersion state of each component of the conductive coating, The adhesive strength changes due to variations in various conditions such as the thickness of the coating film and the coating density. Therefore, if it is impacted after the manufacturing process of the color picture tube or after the tube is completed, or if it comes into contact with other members during the manufacturing process of the color picture tube, it will peel off, and the flakes and particles will adhere to the electron gun and become resistant to it. There are problems that the voltage characteristics are deteriorated and that the electron beam passage hole is clogged by being attached to the shadow mask.

【0008】このような問題を防止するために、導電塗
料を塗布するときのファンネルの温度、導電塗料塗布後
の乾燥方法、導電塗料中の結着剤としての珪酸アルカリ
水溶液の濃度、粘度など、色々な面から接着強度を向上
させる方法が試みられているが、十分な成果が得られて
いない。
In order to prevent such a problem, the temperature of the funnel when applying the conductive paint, the drying method after applying the conductive paint, the concentration and viscosity of the alkaline silicate aqueous solution as a binder in the conductive paint, etc. Various methods have been attempted to improve the adhesive strength, but no sufficient results have been obtained.

【0009】この発明は、上記問題点に鑑みてなされた
ものであり、陰極線管のファンネルの径大部およびネッ
クの内面に塗布形成される導電膜の接着強度および膜強
度を向上して、導電膜の剥落を低減することを目的とす
る。
The present invention has been made in view of the above problems, and improves the adhesion strength and the film strength of the conductive film formed by coating on the large diameter part of the funnel of the cathode ray tube and the inner surface of the neck to improve the conductivity. The purpose is to reduce film peeling.

【0010】[0010]

【課題を解決するための手段】陰極線管バルブのファン
ネルの径大部およびネックの内面に導電膜が塗布形成さ
れてなる陰極線管において、その導電膜を、少なくとも
黒鉛、酸化第二鉄、珪酸アルカリおよび450℃以下で
溶融する低融点ガラスを成分とし、その低融点ガラスを
他の成分の全量に対して3〜20重量%含むものとし
た。
In a cathode ray tube in which a conductive film is formed by coating on a large diameter portion of a funnel of a cathode ray tube valve and an inner surface of a neck, the conductive film is formed of at least graphite, ferric oxide, or alkali silicate. And a low-melting glass that melts at 450 ° C. or lower as a component, and the low-melting glass is contained in an amount of 3 to 20 wt% with respect to the total amount of other components.

【0011】[0011]

【作用】上記のように、ファンネルの径大部およびネッ
クの内面の導電膜を、少なくとも黒鉛、酸化第二鉄、珪
酸アルカリおよび450℃以下で溶融する低融点ガラス
を成分とし、その低融点ガラスを他の成分の全量に対し
て3〜20重量%含むものとすると、導電膜特性を劣化
させることなく、かつ低融点ガラスを結着剤として本来
の結着剤である珪酸アルカリの量を減らしても接着強度
および膜強度を高めることができる。
As described above, the conductive film on the large-diameter portion of the funnel and the inner surface of the neck contains at least graphite, ferric oxide, alkali silicate, and a low-melting glass that melts at 450 ° C. or lower. Is contained in an amount of 3 to 20% by weight based on the total amount of other components, the conductive film characteristics are not deteriorated and the amount of alkali silicate which is the original binder is reduced by using the low melting point glass as a binder. Can also increase the adhesive strength and the film strength.

【0012】[0012]

【実施例】以下、図面を参照してこの発明を実施例に基
づいて説明する。
DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described based on embodiments with reference to the drawings.

【0013】図1にその一実施例であるカラー受像管を
示す。このカラー受像管は、ガラス製パネル1およびこ
のパネル1にフリットガラス(低融点はんだガラス)に
より一体に接合されたガラス製漏斗状のファンネル2か
らなるバルブを有する。そのパネル1の内面には、青、
緑、赤に発光するドット状またはストライプ状の3色蛍
光体層からなる蛍光体スクリーン3が設けられ、この蛍
光体スクリーン3に対向して、その内側にシャドウマス
ク4が配置されている。このシャドウマスク4は、パネ
ル1に設けられた複数個のスタッドピン5と、シャドウ
マスク4のマスクフレーム6に取付けられてそのスタッ
ドピン5に係止する弾性支持体7とによりパネル1の内
側に支持されている。一方、ファンネル2のネック9内
には、3電子ビーム10を放出する電子銃11が配設さ
れている。またファンネル2の径大部12には、比較的
高抵抗の導電膜13f が、またネック9の径大部隣接部
の内面には、比較的低抵抗の導電膜13n が設けられ、
ファンネル2の径大部12に設けられた陽極端子14に
接続されている。
FIG. 1 shows a color picture tube which is one of the embodiments. This color picture tube has a bulb composed of a glass panel 1 and a glass funnel-shaped funnel 2 integrally joined to the panel 1 by frit glass (low melting point solder glass). On the inner surface of the panel 1, blue,
A phosphor screen 3 including a dot-shaped or stripe-shaped three-color phosphor layer that emits green and red is provided, and a shadow mask 4 is arranged inside the phosphor screen 3 so as to face the phosphor screen 3. The shadow mask 4 is provided inside the panel 1 by a plurality of stud pins 5 provided on the panel 1 and an elastic support 7 attached to the mask frame 6 of the shadow mask 4 and locked to the stud pins 5. It is supported. On the other hand, in the neck 9 of the funnel 2, an electron gun 11 that emits the three electron beams 10 is arranged. Further, the large-diameter portion 12 of the funnel 2 is provided with a relatively high resistance conductive film 13f, and the inner surface of the neck 9 adjacent to the large-diameter portion is provided with a relatively low resistance conductive film 13n.
It is connected to an anode terminal 14 provided on the large-diameter portion 12 of the funnel 2.

【0014】上記ファンネル2の径大部12の導電膜1
3f は、少なくとも黒鉛、酸化第二鉄、酸化チタン、結
着剤としての珪酸アルカリ、およびガラス製ファンネル
2の熱膨張係数に近い熱膨張係数を有し、かつ450℃
以下で溶融する酸化鉛(PbO)、酸化亜鉛(Zn
O)、酸化硼素(B2 3 )、酸化ビスマス(Bi 2
3)、酸化リチウム(Li O2 )、二酸化珪素(Si O
2 )から選択された1種以上の酸化物からなる450℃
以下で溶融する低融点ガラスを成分として含む。この低
融点ガラス成分の含有量は、それ以外の成分の全量に対
して3−20重量%である。このような導電膜13f
は、上記黒鉛、酸化第二鉄、酸化チタンなどの微粒子お
よび上記低融点ガラス成分の微粒子を珪酸アルカリ水溶
液に分散してなる導電塗料を、刷毛塗り、スプレーなど
の方法により塗布し乾燥することにより形成される。
The conductive film 1 of the large-diameter portion 12 of the funnel 2
3f has at least a coefficient of thermal expansion close to that of the graphite, ferric oxide, titanium oxide, alkali silicate as a binder, and glass funnel 2 and 450 ° C.
Lead oxide (PbO) and zinc oxide (Zn that melt below)
O), boron oxide (B 2 O 3 ), bismuth oxide (Bi 2 O)
3), lithium oxide (Li O 2), silicon dioxide (Si O
450 ℃ consisting of one or more oxides selected from 2 )
A low melting glass that melts below is included as a component. The content of the low melting point glass component is 3 to 20% by weight based on the total amount of the other components. Such a conductive film 13f
Is a conductive paint obtained by dispersing the fine particles of graphite, ferric oxide, titanium oxide and the like and the fine particles of the low-melting glass component in an aqueous solution of alkali silicate, by coating with a method such as brush coating, spraying and drying. It is formed.

【0015】またネック9の径大部隣接部の内面の導電
膜13n は、上記ファンネル2の径大部12の導電膜1
3f から酸化チタンを除いた成分からなり、その各成分
の微粒子(低融点ガラス成分の微粒子を含む)を 珪酸
アルカリ水溶液に分散してなる導電塗料をスポンジ刷毛
塗り、スプレー、フローコートなどの方法により塗布し
乾燥することにより形成される。
The conductive film 13n on the inner surface of the neck 9 adjacent to the large diameter portion is the conductive film 1 of the large diameter portion 12 of the funnel 2.
Conductive paint consisting of 3f components excluding titanium oxide, and fine particles of each component (including fine particles of low-melting glass component) dispersed in alkaline silicate aqueous solution are applied by sponge brush coating, spraying, flow coating, etc. It is formed by coating and drying.

【0016】このように低融点ガラス成分の微粒子を加
えた導電塗料を塗布し乾燥したファンネル2を、はんだ
ガラスによるパネルとファンネルとを接合条件、すなわ
ちパネルとファンネルとを接合するための大気雰囲気の
封着炉に入れ、約440℃で約50分加熱すると、導電
膜中の低融点ガラス成分が溶融して、黒鉛や酸化第二鉄
などの他の成分の微粒子を包み込むように溶け込み、し
かもファンネル2の内面に接した部分の低融点ガラス成
分がファンネル2と同じガラス質であるため、ファンネ
ルの径大部12やネック9の内面に強固に接着し、導電
膜の接着強度および膜強度をきわめて大きくする。その
結果、このように低融点ガラス成分の微粒子を加えるこ
とにより、従来からの結着剤である珪酸アルカリの添加
量を減らしても、十分な接着強度および膜強度が得ら
れ、かつ珪酸アルカリを減らすことにより、導電膜から
のガス放出が低減し、特性劣化をおこさない信頼性の高
いカラー受像管とすることができる。
As described above, the funnel 2 coated with the conductive paint containing the fine particles of the low melting point glass component and dried is used under the bonding condition of the panel and the funnel made of solder glass, that is, in the air atmosphere for bonding the panel and the funnel. When placed in a sealing furnace and heated at about 440 ° C. for about 50 minutes, the low-melting-point glass component in the conductive film melts and melts so as to enclose fine particles of other components such as graphite and ferric oxide. Since the low-melting-point glass component of the portion in contact with the inner surface of 2 has the same glass quality as the funnel 2, it firmly adheres to the large-diameter portion 12 of the funnel and the inner surface of the neck 9, and the adhesive strength and film strength of the conductive film are extremely high. Enlarge. As a result, by adding fine particles of the low-melting-point glass component in this way, sufficient adhesive strength and film strength can be obtained and alkali silicate can be obtained even if the addition amount of alkali silicate, which is a conventional binder, is reduced. By reducing the amount, gas emission from the conductive film is reduced, and a highly reliable color picture tube that does not cause characteristic deterioration can be obtained.

【0017】表1に上記ファンネルの径大部およびネッ
ク内面の導電膜の特性評価結果を示す。この導電膜は、
上記成分のファンネル径大部用導電塗料およびネック用
導電塗料を調合し、2時間以上ローリングして十分に撹
拌、粉砕、分散したのち、洗浄、乾燥した20インチ管
用ファンネルに、径大部内面についてはスプレー法によ
り、ネックの径大部隣接部の内面についてはスポンジ刷
毛塗り法により塗布し乾燥して導電膜を形成した。そし
てその半数を、内面に蛍光体スクリーンが形成され、か
つその内側にシャドウマスクの装着された20インチ管
用パネルと組合わせて大気雰囲気の封着炉に入れ、約4
40℃で60分加熱して半製品とし、残りの半数を同じ
く20インチ管用パネルと組合わせて大気雰囲気の封着
炉に入れ、約440℃で60分加熱して接合し、その
後、電子銃の封止、排気を経てカラー受像管に仕上げて
評価した。なお括弧内は、従来の導電塗料を塗布して形
成した比較例である。
Table 1 shows the characteristic evaluation results of the conductive film on the large diameter portion of the funnel and the inner surface of the neck. This conductive film
A funnel for large diameter funnel and a conductive paint for neck of the above components were blended, and thoroughly stirred, crushed and dispersed by rolling for 2 hours or more, and then washed and dried on the funnel for a 20 inch tube, and the inner surface of the large diameter portion Was applied by a spray method, and the inner surface of the portion adjacent to the large diameter portion of the neck was applied by a sponge brush coating method and dried to form a conductive film. Then, half of them are put in a sealing furnace in an air atmosphere by combining with a panel for a 20-inch tube having a phosphor screen formed on the inner surface and a shadow mask mounted on the inside, and about 4
Heat at 40 ° C for 60 minutes to make a semi-finished product, and put the other half together with a panel for 20 inch tube into a sealing furnace in the air atmosphere, heat at about 440 ° C for 60 minutes to bond, then electron gun After being sealed and exhausted, a color picture tube was finished and evaluated. In the parentheses is a comparative example formed by applying a conventional conductive paint.

【0018】[0018]

【表1】 この表1において、(2)の接着強度は、導電膜にセロ
ハン粘着テープを指で押付けたのち、ゆっくりと剥がし
たとき、その10cm2 内に付着した10μm 以上の大き
さの導電膜片および粒子の数をEPMAでカウントした
個数である。
[Table 1] In Table 1, the adhesive strength of (2) is 10 μm or more of conductive film pieces and particles adhered within 10 cm 2 when the cellophane adhesive tape is pressed on the conductive film with a finger and then slowly peeled off. Is the number counted by EPMA.

【0019】(3)のタッピング剥落粒子は、木ハンマ
ーでファンネルの径大部開口側の四辺およびリファレン
スライン付近をタッピングし、剥落した10μm 以上の
大きさの導電膜片および粒子の個数を3本分まとめてE
PMAでカウントし、その1本当りの平均個数である。
The tapping flaking particles of (3) were obtained by tapping the four sides of the funnel on the opening side of the large diameter part and the vicinity of the reference line with a wood hammer to peel off the conductive film pieces having a size of 10 μm or more and three particles. E collectively
It is the average number per one counted by PMA.

【0020】(4)の真空度は、排気後、ゲッターフラ
ッシュ、エミッションエージング、最終仕上をおこなっ
た10本の製品について測定したガス比の平均値であ
る。
The degree of vacuum of (4) is an average value of gas ratios measured for 10 products which have been subjected to getter flash, emission aging and final finishing after evacuation.

【0021】(5)のエミッション(陰極効率)は、電
子銃の各電極に規定の電圧を印加したときのカットオフ
電圧とゼロバイアス時のカソード最大電流から求めた1
0本の製品の平均値である。
The emission (cathode efficiency) of (5) is obtained from the cutoff voltage when a specified voltage is applied to each electrode of the electron gun and the cathode maximum current at zero bias.
It is the average value of 0 products.

【0022】(6)の耐電圧品位FEは、陽極電圧Eb
を徐々に上げてゆき、フィールドエミッションが0.1
μAになったときのEb 値( kV)、耐電圧品位NFL
は、同じくネック蛍光が発生したときのEb 値( k
V)、CTV−BKは、陽極電圧Eb を規定の110%
に上げ、その他電極に規定の電圧を印加して、30分間
CTVセットでヒートランしたとき、その間に発生した
管内放電の本数(括弧内は回数)であり、いずれも10
本の製品についておこなった結果である。
The withstand voltage grade FE of (6) is the anode voltage Eb.
Is gradually increased, and the field emission is 0.1.
Eb value (kV) at μA, withstand voltage grade NFL
Is the Eb value (k
V), CTV-BK, the anode voltage Eb is 110% of the specified value.
The number of discharges in the tube (number in parentheses) generated during the heat run for 30 minutes with the CTV set after applying a specified voltage to the other electrodes.
This is the result of the product of the book.

【0023】この表1に示されているように、この例の
導電膜は、電気抵抗、真空度、エミッション、耐電圧F
E、NFLなどの特性については、従来の導電膜とほと
んど変わらず、導電膜の剥落については、従来の導電膜
にくらべて、接着強度で1/5〜1/6、タッピングで
1/6と減少し、接着強度が向上することが示されてい
る。この接着強度の向上は、耐電圧品位CTV−BKの
CTV実装テストでも確認されている。
As shown in Table 1, the conductive film of this example has electric resistance, vacuum degree, emission, and withstand voltage F.
The characteristics such as E and NFL are almost the same as those of the conventional conductive film, and the peeling of the conductive film is 1/5 to 1/6 in adhesive strength and 1/6 in tapping as compared with the conventional conductive film. It has been shown to decrease and improve the adhesive strength. This improvement in adhesive strength has also been confirmed in a CTV mounting test of withstand voltage grade CTV-BK.

【0024】なお、この例の導電膜は、上記のように従
来のファンネルの径大部およびネックの内面に塗布され
ていた導電膜の成分に低融点ガラス成分を加えるだけで
よく、たとえば特公昭58−56938号公報に示され
ているスタッドピン用とは、使用目的が異なり、アルミ
ニウム膜や有機ラッカー膜などに対する影響は、考える
必要がなく、したがって成分も、均染剤、平滑剤、増粘
剤、その他の添加を必ずしも必要としないものであり、
上記公報に示されている導電膜と相違する。
In the conductive film of this example, a low-melting-point glass component may be added to the components of the conductive film applied to the large-diameter portion of the conventional funnel and the inner surface of the neck as described above. The purpose of use is different from that for stud pins shown in Japanese Patent Laid-Open No. 58-56938, and it is not necessary to consider the influence on the aluminum film and the organic lacquer film, and therefore the components are also leveling agents, leveling agents, thickening agents Agents and other additions are not always necessary,
This is different from the conductive film shown in the above publication.

【0025】なお、上記実施例では、カラー受像管につ
いて説明したが、この発明は、カラー受像管以外の陰極
線管にも適用することができる。
Although the color picture tube has been described in the above embodiment, the present invention can be applied to a cathode ray tube other than the color picture tube.

【0026】[0026]

【発明の効果】ファンネルの径大部およびネックの内面
の導電膜を、少なくとも黒鉛、酸化第二鉄、珪酸アルカ
リおよび450℃以下で溶融する低融点ガラスを成分と
し、その低融点ガラスを他の成分の全量に対して3〜2
0重量%含むものとすると、導電膜特性を劣化させるこ
となく、かつ低融点ガラスを結着剤として本来の結着剤
である珪酸アルカリの量を減らしても、膜強度および接
着強度を高めることができ、導電膜の剥落による不良の
発生を軽減でき、信頼性の高い陰極線管とすることがで
きる。
The conductive film on the large diameter part of the funnel and on the inner surface of the neck is made of at least graphite, ferric oxide, alkali silicate and a low melting point glass that melts at 450 ° C. or lower. 3 to 2 for the total amount of ingredients
When it is contained in an amount of 0% by weight, the film strength and the adhesive strength can be increased without deteriorating the characteristics of the conductive film and reducing the amount of alkali silicate which is the original binder using low melting point glass as a binder. Therefore, it is possible to reduce the occurrence of defects due to the peeling of the conductive film, and it is possible to obtain a highly reliable cathode ray tube.

【図面の簡単な説明】[Brief description of drawings]

【図1】この発明の一実施例であるカラー受像管の構成
を示す図である。
FIG. 1 is a diagram showing a configuration of a color picture tube which is an embodiment of the present invention.

【符号の説明】[Explanation of symbols]

2…ファンネル 3…蛍光体スクリーン 9…ネック 11…電子銃 12…径大部 13f ,13n …導電膜 14…陽極端子 2 ... Funnel 3 ... Phosphor screen 9 ... Neck 11 ... Electron gun 12 ... Large diameter part 13f, 13n ... Conductive film 14 ... Anode terminal

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 陰極線管バルブのファンネルの径大部お
よびネックの内面に導電膜が塗布形成され、この導電膜
が少なくとも黒鉛、酸化第二鉄、珪酸アルカリおよび4
50℃以下で溶融する低融点ガラスを成分とし、この低
融点ガラスが他の成分の全量に対して3〜20重量%含
むことを特徴とする陰極線管。
1. A conductive film is formed by coating on the large-diameter portion of the funnel of the cathode ray tube valve and on the inner surface of the neck, and the conductive film is at least graphite, ferric oxide, alkali silicate and 4
A cathode ray tube comprising a low-melting glass that melts at 50 ° C. or lower as a component, and the low-melting glass contains 3 to 20% by weight with respect to the total amount of other components.
JP11939993A 1993-05-21 1993-05-21 Cathode-ray tube Pending JPH06333516A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11939993A JPH06333516A (en) 1993-05-21 1993-05-21 Cathode-ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11939993A JPH06333516A (en) 1993-05-21 1993-05-21 Cathode-ray tube

Publications (1)

Publication Number Publication Date
JPH06333516A true JPH06333516A (en) 1994-12-02

Family

ID=14760536

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11939993A Pending JPH06333516A (en) 1993-05-21 1993-05-21 Cathode-ray tube

Country Status (1)

Country Link
JP (1) JPH06333516A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR970008296A (en) * 1995-07-28 1997-02-24 구자홍 Cathode ray tube conductive coating liquid
JP2009541932A (en) * 2006-06-23 2009-11-26 トムソン ライセンシング Black matrix coating for display

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR970008296A (en) * 1995-07-28 1997-02-24 구자홍 Cathode ray tube conductive coating liquid
JP2009541932A (en) * 2006-06-23 2009-11-26 トムソン ライセンシング Black matrix coating for display

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