JPS6050018B2 - Method for forming a conductive film on the inner surface of a cathode ray tube - Google Patents
Method for forming a conductive film on the inner surface of a cathode ray tubeInfo
- Publication number
- JPS6050018B2 JPS6050018B2 JP6531579A JP6531579A JPS6050018B2 JP S6050018 B2 JPS6050018 B2 JP S6050018B2 JP 6531579 A JP6531579 A JP 6531579A JP 6531579 A JP6531579 A JP 6531579A JP S6050018 B2 JPS6050018 B2 JP S6050018B2
- Authority
- JP
- Japan
- Prior art keywords
- conductive film
- funnel
- forming
- liquid conductor
- cathode ray
- 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
Links
- 238000000034 method Methods 0.000 title claims description 11
- 239000007788 liquid Substances 0.000 claims description 22
- 239000004020 conductor Substances 0.000 claims description 21
- 238000012856 packing Methods 0.000 claims 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 11
- 229910002804 graphite Inorganic materials 0.000 description 10
- 239000010439 graphite Substances 0.000 description 10
- 239000002184 metal Substances 0.000 description 7
- 238000007789 sealing Methods 0.000 description 5
- 238000000576 coating method Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 238000005019 vapor deposition process Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Description
【発明の詳細な説明】
本発明は陰極線管の内面に導電膜を形成する方法に関
するものてある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for forming a conductive film on the inner surface of a cathode ray tube.
第１図は平板状のフェースプレートを用いた陰極線管
を示すもので、図において１は内面に螢光膜２及びアル
ミニウム等の蒸着によるメタルパット層３を形成した平
板状のフエニースプレート、４は例えば中空四角錐体の
頂部４ａに透孔を穿設し、これより外方に延びるネック
部５を溶着し、底面４ｂを開口したフアンネル部でフア
ンネル部４の内面には導電膜６を形成しフアンネル部４
の開口端４Ｃにフェースプレート１を、フェースプレー
ト１のメタルパット層３とフアンネル部４の導電膜６と
を電気的に接続するようにフリットガラス７で封着して
バルブＡを形成している。Fig. 1 shows a cathode ray tube using a flat face plate. For example, a through hole is bored in the top part 4a of a hollow square pyramid, a neck part 5 extending outward from the hole is welded, and a conductive film 6 is formed on the inner surface of the funnel part 4 with an open bottom face 4b. Funnel part 4
Bulb A is formed by sealing face plate 1 to open end 4C of face plate 1 with frit glass 7 so as to electrically connect metal pad layer 3 of face plate 1 and conductive film 6 of funnel portion 4. .
そしてネック部５に電子銃８を封入し排気している。尚
、メタルパット層３と導電膜６との電気的接続は例えば
弾性を有する帯状の金属９の一部がメタ ルパット層３
と導電膜６と接続させるようにすればよい。 ところで
、上記導電膜６の形成方法であるが、これにはネック部
５とフアンネル部４及びフェースプレート１を一体化し
たバルブの状態で行う場合と、ネック部５とフアンネル
部４とを一体化した状態で行ないフェースプレートで封
着する場合とがある。An electron gun 8 is enclosed in the neck portion 5 and evacuated. Note that the electrical connection between the metal pad layer 3 and the conductive film 6 is such that, for example, a part of the elastic band-shaped metal 9 is connected to the metal pad layer 3.
What is necessary is to connect it to the conductive film 6. By the way, regarding the above method of forming the conductive film 6, there are two methods: one is to form a bulb in which the neck part 5, funnel part 4, and face plate 1 are integrated, and the other is to form a bulb in which the neck part 5, funnel part 4, and face plate 1 are integrated. In some cases, it is carried out in a closed state and sealed with a face plate.
前者の場合は細いネック部５を通して塗布しなければな
らないため、作業性が悪く、特に小型の陰極線管に於て
は不適当であつた。又、後者の場合は螢光膜をスクリー
ン印刷により形成できる上、蒸着作業も容易であるとい
う利点があるが、この場合導電膜は第２図に示すように
、ネック部５を有するフアンネル部４をフアンネル部の
開口端面４ｃを上にネック部５を下にして、ネック部５
の下端を栓Ｂで密閉しておいてから、フアンネル部４の
底面４ｂより液状導電体１０を所定の位置まで注入し、
而してから栓Ｂを抜いてネック部５より液状導電体１０
を排出していた。こ’のようにすると、導電体の薄い層
１０′が第３図に示すようにフアンネル部４の内面に形
成され、これを焼成して導電膜を形成していた。尚、液
状導電体１０は一般に黒鉛微粉末を水ガラスに混合させ
たものが用いられガラスの付着性の良いもの・が使用さ
れている。ところが、この方法では黒鉛がフアンネル部
４の開口端面４ｃに付着したり、ネック部５の不所望部
分に付着する。そのため、フアンネル部４の開口端面４
ｃにフリットガラス７を介してフエースプレート１を溶
着しバルブを形成する場合、開口端面４ｃに黒鉛が付着
していると封止性が劣化するため、開口端面４ｃに黒鉛
が付着しないようにしたり、ネック部５の不所望部分に
付着した黒鉛を除去する作業が必要であつた。又、上記
ネック部５の一部とフアンネル部４の内面に筆でもつて
黒鉛を手作業により塗布する方法もあるが、これでは作
業性が悪く、量産化が難しい。In the former case, the coating must be applied through the narrow neck portion 5, resulting in poor workability and is particularly unsuitable for small cathode ray tubes. In the latter case, the fluorescent film can be formed by screen printing, and the vapor deposition process is also easy. With the open end surface 4c of the funnel section up and the neck section 5 down, insert the neck section 5.
After sealing the lower end with a stopper B, inject the liquid conductor 10 to a predetermined position from the bottom surface 4b of the funnel part 4,
After that, remove the plug B and pour the liquid conductor 10 from the neck part 5.
was being emitted. In this way, a thin layer 10' of a conductor is formed on the inner surface of the funnel portion 4 as shown in FIG. 3, and this is fired to form a conductive film. Incidentally, the liquid conductor 10 is generally a mixture of fine graphite powder and water glass, and has good adhesion to glass. However, in this method, graphite adheres to the open end surface 4c of the funnel portion 4 or to an undesired portion of the neck portion 5. Therefore, the opening end surface 4 of the funnel portion 4
When forming a bulb by welding the face plate 1 to c through the frit glass 7, sealing performance will deteriorate if graphite adheres to the opening end surface 4c, so make sure that graphite does not adhere to the opening end surface 4c. , it was necessary to remove graphite adhering to undesired portions of the neck portion 5. There is also a method of manually applying graphite to a part of the neck portion 5 and the inner surface of the funnel portion 4 using a brush, but this method has poor workability and is difficult to mass-produce.
又、フアンネル部４の開口端面４ｃやネック部５の不所
望部分へ黒鉛が付着しないように配慮する必要があつた
。本発明は上記問題点に鑑み、これを解決したものであ
、フアンネル部の開口端面やネック部の不所望部分への
黒鉛の付着を防止する等の工夫をなした黒鉛塗布方法で
ある。Further, it was necessary to take care to prevent graphite from adhering to the open end surface 4c of the funnel portion 4 or to undesired portions of the neck portion 5. The present invention has been made in view of the above-mentioned problems, and is a graphite coating method that is devised to prevent graphite from adhering to the open end face of the funnel portion or to undesired portions of the neck portion.
以下、本発明を図面を参照して説明する。いま第４図よ
り黒鉛塗布装置を説明すると、１１はゴム等のバッキン
グ、１２は液状導電体１０を収納する上面を開口したケ
ース、１３はケース１２内に液状導電体１０を送り込み
、又、ケース１２内の液状導電体１０を排出するバイブ
である。Hereinafter, the present invention will be explained with reference to the drawings. Now, to explain the graphite coating device from FIG. 4, 11 is a backing made of rubber or the like, 12 is a case with an open top for storing the liquid conductor 10, and 13 is a case for feeding the liquid conductor 10 into the case 12. This is a vibrator that discharges the liquid conductor 10 inside the liquid conductor 12.
前記バッキング１１はフアンネル部４の開口底面４ｂに
対応したリング状のもので、その上面−は第８図に示す
ように、フアンネル部の開口端面４ｃに対向するフラッ
ト面１１ａと、フアンネル部の開口底面４ｂに嵌合し内
面に密着するテーパ面１１ｂとを形成し、このテーパ面
１１ｂの一部には切欠き１１ｃを設けている。又、バッ
キング１１の下面１１ｄはケース１２の開口端面に密着
固定している。次に上記構成による導電膜形成方法を説
明すると、ます第４図の状態にセットする。The backing 11 is ring-shaped and corresponds to the opening bottom surface 4b of the funnel section 4, and its upper surface has a flat surface 11a facing the opening end surface 4c of the funnel section and an opening of the funnel section, as shown in FIG. A tapered surface 11b that fits into the bottom surface 4b and comes into close contact with the inner surface is formed, and a notch 11c is provided in a part of the tapered surface 11b. Further, the lower surface 11d of the backing 11 is closely fixed to the open end surface of the case 12. Next, the method of forming a conductive film with the above structure will be explained. First, the state shown in FIG. 4 is set.
つまり、ケース１２に密着固定したバッキング１１上に
ファ５ンネル部４の開口底面４ｂを嵌合し、その内面を
密着させて固定させる。このとき、ネック部５は開放し
ておく。而してから、バイブ１３より液状導電体１０を
ケース１２内に送り込み、更に圧力をかけてケース１２
からバッキング１１で密着固４定されたフアンネル部４
内へと充満させていく。そして、第５図に示すように、
液状導電体１０の液面がネック部５内の所定位置までく
ると液状導電体１０の注入を止め、次にバイブ１３から
液状導電体１０を排出する。すると第６図に示すように
、フアンネル部４及びネック部５の内面に導電体の薄い
層１『を形成する。このとき、フアンネル部４の開口端
面４Ｃとこれに隣接する内面はバッキング１１によつて
しやへいされているため、ここに液状導電体１０が付着
することはない。但し、フアンネル部の開口端面４ｃに
隣接する内面の一部、つまりバッキング１１の切欠き１
１ｃ部には開口端面４ｃ近傍まで液状導電気の層ｊが延
長している。後はバッキング１１よりバルブを取り外し
、内面に付着した導電体の薄い層１『を乾燥し焼成すれ
ば第７図に示すように、バルブ内に所定の導電膜６が形
成される。That is, the opening bottom surface 4b of the funnel portion 4 is fitted onto the backing 11 which is tightly fixed to the case 12, and the inner surface thereof is tightly fixed. At this time, the neck portion 5 is left open. After that, the liquid conductor 10 is sent into the case 12 from the vibrator 13, and further pressure is applied to the case 12.
The funnel part 4 is tightly fixed with the backing 11.
Fill it inside. Then, as shown in Figure 5,
When the liquid level of the liquid conductor 10 reaches a predetermined position within the neck portion 5, the injection of the liquid conductor 10 is stopped, and then the liquid conductor 10 is discharged from the vibrator 13. Then, as shown in FIG. 6, a thin conductive layer 1' is formed on the inner surfaces of the funnel part 4 and the neck part 5. At this time, since the open end surface 4C of the funnel portion 4 and the inner surface adjacent thereto are shielded by the backing 11, the liquid conductor 10 does not adhere thereto. However, a part of the inner surface adjacent to the open end surface 4c of the funnel portion, that is, the notch 1 of the backing 11
In the portion 1c, a liquid conductive layer j extends to the vicinity of the opening end surface 4c. After that, the bulb is removed from the backing 11, and the thin conductive layer 1'' attached to the inner surface is dried and fired to form a predetermined conductive film 6 inside the bulb, as shown in FIG.
尚、この乾燥までの間に、・導電体の薄い層１『が自重
でフアンネル部４″内面を垂れ下ることがあるが、開口
端面４Ｃとの間に距離があるため端面４ｃまで垂れ下る
ことを防止できる。又、内面の一部にはバッキング１１
の切欠き１１ｃによる導電膜６″が開口端面４Ｃ方゛向
に延長して形成される。この導電膜６″はフエースプレ
ートとフアンネル部の封着時にフエースプレート内面の
メタルパット層との接続に用いられるメタルパット層及
び導電膜にアノード電圧を供給することができる。尚、
液状導電体は黒鉛を用いるだけでなく、ガス放出が少な
く、ガラスとの付着性の良くて、適当な導電性を有する
ものであれば何でもよい。In addition, until this drying, the thin layer 1'' of the conductor may hang down the inner surface of the funnel part 4'' due to its own weight, but because there is a distance between it and the opening end surface 4C, it may hang down to the end surface 4c. In addition, a backing 11 is provided on a part of the inner surface.
A conductive film 6'' is formed by the notch 11c extending in the direction of the open end surface 4C.This conductive film 6'' is used for connection with the metal pad layer on the inner surface of the face plate when sealing the face plate and the funnel part. An anode voltage can be supplied to the metal pad layer and conductive film used. still,
The liquid conductor may be not only graphite but also any material that emits less gas, has good adhesion to glass, and has appropriate conductivity.
以上説明したように、本発明によれば、フアンネル部開
口端面とこれに隣接する内面はバッキングでしやへいさ
れた状態で液状導電体が充満され、而も液状導電体の充
満はネック部の導電膜不所望部分以下に規定できるため
、液状導電体は必要部分にだけ塗布され、従つて不用な
部分の導電膜削除の手間がなくなり、バルブの封止性の
劣化も防止できる。またバッキングはテーパー面でフア
ンネル部内面と嵌合するようにしているからフアンネル
部の寸法にばらつきがあつても密着性に影響がない。ま
たフエースプレートのメタルパット層と電気的接続され
る部分も同時に形成することができる。又、液状導電膜
の注入と排出によつて塗布ができるため、導電膜形成工
程の自動化が容易であり、インデックスの向上が可能と
なる。As explained above, according to the present invention, the opening end face of the funnel part and the inner surface adjacent thereto are filled with the liquid conductor while being kept damp by the backing, and the liquid conductor is filled only at the neck part. Since the conductive film can be defined below the undesired portion, the liquid conductor is applied only to the necessary portions, thereby eliminating the need to remove the conductive film from unnecessary portions and preventing deterioration of the sealing performance of the valve. Further, since the backing has a tapered surface that fits into the inner surface of the funnel portion, even if the dimensions of the funnel portion vary, the adhesion is not affected. Further, a portion electrically connected to the metal pad layer of the face plate can also be formed at the same time. Further, since the coating can be performed by injecting and discharging the liquid conductive film, automation of the process of forming the conductive film is easy, and the index can be improved.
第１図は平板状フエースプレートを用いた陰極線管の側
断面図、第２図及び第３図は従来の導電膜形成方法の一
例を示す説明図、第４図乃至第７図は本発明に係る導電
膜形成方法を説明する説明図、第８図はバッキングの例
を示す斜視図である。
４・・・・・・フアンネル部、４ｃ・・・・・・開口端
面、１１・・・・バッキング、１１ｂ・・・・・・テー
パ面、１１ｃ・・・・切欠き、１０・・・・・・液状導
電体。FIG. 1 is a side sectional view of a cathode ray tube using a flat face plate, FIGS. 2 and 3 are explanatory diagrams showing an example of a conventional method for forming a conductive film, and FIGS. FIG. 8, which is an explanatory diagram for explaining such a method of forming a conductive film, is a perspective view showing an example of a backing. 4...funnel part, 4c...opening end surface, 11...backing, 11b...tapered surface, 11c...notch, 10... ...Liquid conductor.
Claims (1)
向けて配置し、外周面にテーパー面を形成し、かつテー
パー面の一部に切欠きを設けたパッキングをフアンネル
部の内面に嵌合し密着させ、パッキングを介してフアン
ネル部内に液状導電体を注入し、所定の高さまで注入後
、液状導電体を排出するようにしたことを特徴とする陰
極線管の内面導電膜形成方法。1 The opening end surface of the funnel portion having the neck portion is placed facing downward, and the packing, which has a tapered surface formed on the outer circumferential surface and a notch provided in a part of the tapered surface, is fitted onto the inner surface of the funnel portion and tightly attached. A method for forming a conductive film on an inner surface of a cathode ray tube, characterized in that a liquid conductor is injected into a funnel portion through packing, and after being injected to a predetermined height, the liquid conductor is discharged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6531579A JPS6050018B2 (en) | 1979-05-25 | 1979-05-25 | Method for forming a conductive film on the inner surface of a cathode ray tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6531579A JPS6050018B2 (en) | 1979-05-25 | 1979-05-25 | Method for forming a conductive film on the inner surface of a cathode ray tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55157840A JPS55157840A (en) | 1980-12-08 |
| JPS6050018B2 true JPS6050018B2 (en) | 1985-11-06 |
Family
ID=13283344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6531579A Expired JPS6050018B2 (en) | 1979-05-25 | 1979-05-25 | Method for forming a conductive film on the inner surface of a cathode ray tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6050018B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02126919U (en) * | 1989-03-29 | 1990-10-19 | ||
| US20220310925A1 (en) * | 2021-03-12 | 2022-09-29 | Sfc Co., Ltd | Polycyclic compound and organic electroluminescent device using the same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57202039A (en) * | 1981-06-05 | 1982-12-10 | Nippon Electric Glass Co Ltd | Manufacture of glass bulb for black-and-white picture tube |
-
1979
- 1979-05-25 JP JP6531579A patent/JPS6050018B2/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02126919U (en) * | 1989-03-29 | 1990-10-19 | ||
| US20220310925A1 (en) * | 2021-03-12 | 2022-09-29 | Sfc Co., Ltd | Polycyclic compound and organic electroluminescent device using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55157840A (en) | 1980-12-08 |
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