JPS61179036A - Manufacture of shadow mask - Google Patents
Manufacture of shadow maskInfo
- Publication number
- JPS61179036A JPS61179036A JP1889785A JP1889785A JPS61179036A JP S61179036 A JPS61179036 A JP S61179036A JP 1889785 A JP1889785 A JP 1889785A JP 1889785 A JP1889785 A JP 1889785A JP S61179036 A JPS61179036 A JP S61179036A
- Authority
- JP
- Japan
- Prior art keywords
- shadow mask
- diameter portion
- electron beam
- large diameter
- powder
- 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
Links
Classifications
-
- 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
- H01J9/02—Manufacture of electrodes or electrode systems
- H01J9/14—Manufacture of electrodes or electrode systems of non-emitting electrodes
- H01J9/142—Manufacture of electrodes or electrode systems of non-emitting electrodes of shadow-masks for colour television tubes
- H01J9/146—Surface treatment, e.g. blackening, coating
-
- 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
- H01J29/06—Screens for shielding; Masks interposed in the electron stream
- H01J29/07—Shadow masks for colour television tubes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2229/00—Details of cathode ray tubes or electron beam tubes
- H01J2229/07—Shadow masks
- H01J2229/0727—Aperture plate
- H01J2229/0777—Coatings
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、カラー陰極線管に内蔵される色選別電極で
あるシャドウマスクの製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a shadow mask, which is a color selection electrode built into a color cathode ray tube.
カラー陰極線管におけるシャドウマスクの製造方法につ
いては、株式会社産報の電子科学1964年V o L
14 / A 9 t 36頁および、39頁〜40
頁に示さnている。Regarding the manufacturing method of shadow masks for color cathode ray tubes, please refer to Sanpo Co., Ltd.'s Denshi Kagaku 1964 V o L
14/A9t pages 36 and 39-40
It is shown on page n.
ところで、一般に陰極線管は第4図に示すように皿状の
ガラス容器であるパネルαqと、電子ビーム全発射する
電子銃(111’を内蔵しているロート状のファンネル
0aとからなり、こ1らパネルαqとファンネルαυと
の間に色選別電極としてのシャドウマスクajが介在さ
れ、パネル叫に支持部に1よって保持されている。By the way, as shown in Fig. 4, a cathode ray tube generally consists of a panel αq, which is a dish-shaped glass container, and a funnel-shaped funnel 0a, which houses an electron gun (111') that emits the entire electron beam. A shadow mask aj serving as a color selection electrode is interposed between the panel αq and the funnel αυ, and is held by a support portion 1 on the panel.
この色選別電極a3としてのシャドウマスクハ、第5図
のように0.15〜0.2511@の鉄板製の基体α4
rc丸形もしくは長方形の電子ビーム通過孔(至)を形
成し念もので、初工程では平担な形状である上記鉄板を
パネルαq内面の球面形状にならないように熱処理(水
素雰囲気中で700〜920℃)してからプレス加工し
、しかる後にその表面に、黒錆を得るための表面処理1
施こして製作される。The shadow mask serving as the color selection electrode a3 is made of iron plate base α4 of 0.15 to 0.2511@ as shown in FIG.
In order to form an rc round or rectangular electron beam passage hole, the iron plate, which had a flat shape in the initial process, was heat-treated (heated to 700°C in a hydrogen atmosphere to prevent the inner surface of the panel αq from becoming spherical. 920℃) and then press processing, and then surface treatment 1 to obtain black rust on the surface.
It is manufactured by applying.
この黒錆を得る処理を表面黒化(Blackening
)と称している。この処理は、まずプレス加工時に付着
した油の脱脂を完全に行なった後、アルカリ溶融塩に浸
漬して黒錆を発生させる方法、あるいは、水蒸気もしく
は炭酸ガスを用いて黒錆を得る方法等がある。この処理
で得らする黒錆は、カラー陰極線管を製造する工程中に
おいて、空気中の雰囲気で400℃前後で加熱されるシ
ャドウマスク基体Q4が酸化して赤錆が発生するのを防
止するためのものである。The process to obtain this black rust is called surface blackening.
). This treatment can be done by first completely degreasing the oil that adhered during press working, and then immersing it in alkaline molten salt to generate black rust, or by using steam or carbon dioxide gas to generate black rust. be. The black rust obtained by this process is a process used to prevent the formation of red rust due to oxidation of the shadow mask base Q4, which is heated at around 400°C in an air atmosphere during the process of manufacturing color cathode ray tubes. It is something.
一方、カラー陰極線管の動作中に電子銃αυから発射さ
れた電子ビームの8割近くが、シャドウマスクα3に衝
突する九め、その電子ビームの運動エネルギーが熱エネ
ルギーに変換さn、シャドウマスク03は熱膨張を起こ
して歪変形を生じる。上記黒錆にすることは輻射率を0
.75程度にして、熱放散金よくして、熱に起因する歪
を小さくする役目も合せ有している。On the other hand, when the color cathode ray tube is in operation, nearly 80% of the electron beam emitted from the electron gun αυ collides with the shadow mask α3, and the kinetic energy of the electron beam is converted into thermal energy. causes thermal expansion and distortion deformation. Making the above black rust reduces the emissivity to 0.
.. By making it about 75, it also serves to improve heat dissipation and reduce distortion caused by heat.
この黒錆では、輻射率がFe3O4で0.75程度であ
夛、シャドウマスク(至)の素材からは、それ以上のも
のが得らnrc<い。しかるに、最近のカラー陰極線管
では、映像の忠実な再現性という観点から、パネル面を
平担化したり、単位面績あたりの情報量を多くするとと
もに、画質を明るく鮮明化させることが求めらnている
。こ八らの要求に応じる友めには、単位面績当シの情報
量を決定する電子ビーム通過孔の孔径を小さくし、かつ
ピッチ金小さくする必要がある。加工技術からの孔径の
最小限界値はシャドウマスク基体α→の板厚により決定
されるもので、孔径金0.150諺とすると、板厚はほ
ぼ0.1501mと薄肉になる。電子ビームの運動エネ
ルギー、の熱エネルギーに変換される割合は板厚で左右
されるから、板厚が薄くなる場合は、上記のような黒錆
だけでは、シャドウマスク亜の歪変形の防止策としては
不十分である。This black rust has an emissivity of about 0.75 for Fe3O4, and it is impossible to obtain a higher emissivity from the material of the shadow mask. However, with recent color cathode ray tubes, from the perspective of faithful reproduction of images, it is necessary to flatten the panel surface, increase the amount of information per unit screen, and make the image quality brighter and clearer. ing. To meet these demands, it is necessary to reduce the diameter and pitch of the electron beam passage hole, which determines the amount of information per unit surface area. The minimum value of the hole diameter based on processing technology is determined by the plate thickness of the shadow mask base α→.If the hole diameter is 0.150 m, the plate thickness will be as thin as approximately 0.1501 m. The rate at which the kinetic energy of the electron beam is converted into thermal energy depends on the thickness of the plate, so if the plate thickness becomes thinner, black rust as described above cannot be used as a preventive measure against distortion of the shadow mask. is insufficient.
この発明に係るシャドウマスクの製造方法は、シャドウ
マスク基体の表面に電子ビームの衝撃による熱歪の発生
を防止する表面処理層を設けるところにある。すなわち
、電子ビーム通過孔の大径側から静電粉体をスプレー塗
布して基体に表面処理層を形成したものである。A method for manufacturing a shadow mask according to the present invention includes providing a surface treatment layer on the surface of a shadow mask base to prevent thermal distortion caused by electron beam impact. That is, a surface treatment layer is formed on the substrate by spraying electrostatic powder from the large-diameter side of the electron beam passage hole.
この発明においては、シャドウマスク基体の表面に黒錆
に加えて静電粉体の層が形成され、板厚が薄くなった場
合でも歪が発生するのが抑制される。In this invention, a layer of electrostatic powder is formed in addition to black rust on the surface of the shadow mask base, so that distortion is suppressed even when the plate thickness is reduced.
第1図は、この発明に係るシャドウマスクの製造方法に
適用される粉体塗布装置の構成図である。FIG. 1 is a configuration diagram of a powder coating apparatus applied to the method of manufacturing a shadow mask according to the present invention.
同図において、(1)は静電粉体塗布用スプレーガンで
ある。上記静電粉体(5)のスプレーガン(1)には、
粉体供給パイプ(2)と、高電圧発生器(3)より供給
される高電圧の導線(4)が接続されている。(6)は
シャドウマスク基体α→のハンガーで、一端が接地さハ
ている。In the figure, (1) is a spray gun for electrostatic powder coating. The spray gun (1) for the electrostatic powder (5) includes:
A powder supply pipe (2) and a high voltage conductor (4) supplied from a high voltage generator (3) are connected. (6) is a hanger for the shadow mask base α→, one end of which is grounded.
つぎに、上記構成の装置による表面処理層の形成法につ
いて説明する。Next, a method for forming a surface treatment layer using the apparatus having the above configuration will be explained.
色選別電極であるシャドウマスク基体α荀は、すでにそ
の表面に周知の製造法によって黒錆であるFe3O4の
酸化膜が形成されている。この噛化模については図示を
省略する。まず、シャドウマスク基体(14に:対して
電子ビーム通過孔αυの大径部(15a)[からスプレ
ーガン(1)全周いて静電粉体(5)を吹きつけて塗装
を行なう。すなわち、スプレーガン(1) icは高圧
エヤーで送られてきた鉛はう酸塩ガラス〔ム8F−13
07B : Pb0(74,9wt%)、B2O3(8
,6wt %)、Zn0(12,6wt%)、8i02
(2,Owt%)、BgO(1,9wt%)、Co −
Fe −Mn 5pinel (1,Owt %)〕
の化学組成を有する粉体(5)に、高電圧発生器(3)
より導びかまた約100に!/の電気を帯電させ、シャ
ドゥマスク基体σくの電子ビーム通過孔αQの大径部(
15a)側よシスプレーする。スプレーガン(1)よシ
放出された静1粉体(5)の微粒子は第2図のようにシ
ャドウマスク基体cA4の表面、さらに大径部(15a
) 小径部(15C)、中径部(15b) を経
て、中径部(15b)側のシャドウマスク基体α尋の表
面に堆積する。An oxide film of Fe3O4, which is black rust, has already been formed on the surface of the shadow mask substrate α, which is a color selection electrode, by a well-known manufacturing method. The illustration of this textured pattern is omitted. First, the shadow mask base (14) is coated by spraying the electrostatic powder (5) from the large diameter part (15a) of the electron beam passage hole αυ all around with the spray gun (1). That is, Spray gun (1) IC is a lead borate glass [M8F-13] sent by high pressure air.
07B: Pb0 (74.9wt%), B2O3 (8
,6wt%), Zn0 (12,6wt%), 8i02
(2, Owt%), BgO (1,9wt%), Co −
Fe-Mn 5pinel (1, Owt%)]
A high voltage generator (3) is applied to the powder (5) having a chemical composition of
More guidance or about 100! / is charged with electricity, and the large diameter part (
15a) Spray from side. The fine particles of static powder (5) discharged by the spray gun (1) are deposited on the surface of the shadow mask base cA4, as well as on the large diameter part (15a), as shown in Figure 2.
) The particles pass through the small diameter portion (15C) and the medium diameter portion (15b), and are deposited on the surface of the shadow mask base α fathom on the medium diameter portion (15b) side.
つぎに、エヤーガン(図示せず)全周いて、シャドウマ
スク基体α◆の大径部(15a) 側よシ大径部(1
5a) から小径部(15c) にかけての面上の
上記粉体の層(5)全飛散させて113図のように除去
する。Next, move around the entire circumference of the air gun (not shown) to the large diameter part (15a) of the shadow mask base α◆.
The powder layer (5) on the surface from 5a) to the small diameter portion (15c) is completely scattered and removed as shown in Figure 113.
つぎに、シャドウマスク基体σ4)rc対して、小径部
(tSC) から中径ffl (15b) にかけ
ての面に粉体(5)が帯電堆積した状態で、温度440
°Cで約30分間の焼成全行ない、シャドウマスクQ3
を形成する。このシャドウマスク頭金用いて映像を再現
する絵素を形成することにより、カラー陰極線管が製造
される。Next, the powder (5) is charged and deposited on the surface of the shadow mask base σ4)rc from the small diameter part (tSC) to the middle diameter ffl (15b), and the temperature is increased to 440°C.
Complete baking process at °C for about 30 minutes, Shadow Mask Q3
form. A color cathode ray tube is manufactured by using this shadow mask head to form picture elements that reproduce images.
ここで、上記静電粉体(5)がシャドウマスク基体α◆
の表面にスプレー塗布されるから、電子ビームの遅動エ
ネルギーにともなう歪の発生が板厚に関係なく確実に防
止される。しかも、上記粉体(5)が電子ビーム通過孔
αQの大径部(15a) 側からスプレーされるため、
小径部(15C) から中径部(15b)mc向った
粉体(5)は上記スプレーガン(1)かう大径4% (
tea) に飛散するものに左右されることなく、電
子ビーム衝突面側に良好に堆積される。また、この例で
は、粉体塗布後、エヤーによって大径部(X6a)
側および小径部(15c) に堆積している粉体(5
)が取り除かnるため、上記基体σ萄の電子ビームが衝
突する面のみに粉体(5)全堆積させることができる。Here, the electrostatic powder (5) is the shadow mask base α◆
Because it is spray-coated onto the surface of the plate, distortion caused by the slow energy of the electron beam is reliably prevented regardless of the plate thickness. Moreover, since the powder (5) is sprayed from the large diameter part (15a) side of the electron beam passage hole αQ,
The powder (5) directed from the small diameter part (15C) to the medium diameter part (15b) is 4% of the large diameter of the spray gun (1) (
(tea) It is deposited satisfactorily on the electron beam collision surface side, regardless of what is scattered by the electron beam. In this example, after applying the powder, the large diameter part (X6a) is
Powder (5) accumulated on the side and small diameter part (15c)
) is removed, the powder (5) can be entirely deposited only on the surface of the substrate σ that the electron beam collides with.
もちろん、上記粉体(5)t−スプレ・−シ九ままでも
、上記歪の発生防止に寄与できるものである。Of course, even if the powder (5) is left as is, it can contribute to the prevention of the above-mentioned distortion.
以上のようにこの発明は、シャドウマスク基体に形成さ
れている電子ビーム通過孔の大径部側から静電粉体を静
電スプレー法により塗布することにより、シャドウマス
ク基体が薄い場合でも、電子ビームの連動エネルギーに
よる歪の生じないシャドウマスクを得ることができる。As described above, the present invention uses electrostatic spraying to apply electrostatic powder from the large-diameter side of the electron beam passage hole formed in the shadow mask base, so that even if the shadow mask base is thin, the electron It is possible to obtain a shadow mask that is free from distortion due to beam interlocking energy.
【図面の簡単な説明】
第1図はこの発明の実施例によるシャドウマスクの製造
方法に適用される粉体塗布装置の概略構成図、第2図は
粉体が塗布さneシャドウマスク基体の一部の拡大断面
図、第3図は焼成前のシャドウマスク基体の一部の拡大
断面図、第4図はカラー陰極線管の概略構成図、第5図
は従来のシャドウマスク基体金示す一部の拡大断面図で
ある。
(1)はスプレーガン、(3)は高電圧発生器、(5)
は粉体、α4はシャドウマスク基体、(ト)は電子ビー
ム通過孔、(X6a) は大径部、(15b) は
中径部、(ISC) は小径部である。
゛ なお、図中、同一符合は同一もしくは相当部分全示
す。[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a schematic configuration diagram of a powder coating device applied to a method for manufacturing a shadow mask according to an embodiment of the present invention, and FIG. 2 is a diagram showing an example of a shadow mask substrate coated with powder. 3 is an enlarged sectional view of a portion of the shadow mask substrate before firing, FIG. 4 is a schematic configuration diagram of a color cathode ray tube, and FIG. 5 is an enlarged sectional view of a portion of a conventional shadow mask substrate. It is an enlarged sectional view. (1) is a spray gun, (3) is a high voltage generator, (5)
α4 is the powder, α4 is the shadow mask base, (G) is the electron beam passage hole, (X6a) is the large diameter part, (15b) is the medium diameter part, and (ISC) is the small diameter part.゛ In the figures, the same reference numerals indicate all the same or equivalent parts.
Claims (4)
てのシャドウマスクを金属製基体と表面処理層で構成し
、電子ビームの衝突する側から中径部、小径部、大径部
となっている電子ビーム通過孔の上記大径部側から上記
基体に対して粉体を静電スプレー法により塗布してこの
塗布層で上記表面処理層を構成したことを特徴とするシ
ャドウマスクの製造方法。(1) A shadow mask as a color selection electrode with a large number of electron beam passage holes is constructed of a metal base and a surface treatment layer, and is divided into a medium diameter part, a small diameter part, and a large diameter part from the side where the electron beam collides. A method for manufacturing a shadow mask, characterized in that powder is applied to the substrate from the large diameter side of the electron beam passage hole by electrostatic spraying, and the applied layer constitutes the surface treatment layer.
れた大径部側表面の塗布層をエヤースプレーにて除去し
てなる特許請求の範囲第1項記載のシャドウマスクの製
造方法。(2) The method for manufacturing a shadow mask according to claim 1, wherein the coating layer on the surface of the large diameter portion formed by spray coating using the electrostatic spray method is removed using air spray.
は、重金属を主成分としている特許請求の範囲第1項記
載のシャドウマスクの製造方法。(3) The method for manufacturing a shadow mask according to claim 1, wherein the powder spray-applied by the electrostatic spraying method contains heavy metals as a main component.
の比重が6以上である特許請求の範囲第1項記載のシャ
ドウマスクの製造方法。(4) The method for manufacturing a shadow mask according to claim 1, wherein the powder sprayed by the electrostatic spraying method has a specific gravity of 6 or more.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1889785A JPS61179036A (en) | 1985-02-01 | 1985-02-01 | Manufacture of shadow mask |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1889785A JPS61179036A (en) | 1985-02-01 | 1985-02-01 | Manufacture of shadow mask |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS61179036A true JPS61179036A (en) | 1986-08-11 |
Family
ID=11984368
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1889785A Pending JPS61179036A (en) | 1985-02-01 | 1985-02-01 | Manufacture of shadow mask |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61179036A (en) |
-
1985
- 1985-02-01 JP JP1889785A patent/JPS61179036A/en active Pending
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR900005806B1 (en) | Shadow mask manufacture method | |
US4734615A (en) | Color cathode ray tube | |
CN108231531A (en) | A kind of cermet CT bulbs and its preparation process | |
US3668002A (en) | Shadow mask having focusing function and method of making same | |
JPS61179036A (en) | Manufacture of shadow mask | |
JPH07254373A (en) | Color picture tube and manufacture thereof | |
JPH02119032A (en) | Color image receiving tube | |
US2836751A (en) | Cathode ray tube manufacture | |
JPS62123635A (en) | Manufacture of shadow mask | |
JPS6210841A (en) | Color cathode-ray tube | |
JPS6340231A (en) | Surface treatment process for shadow mask | |
JPS6369119A (en) | Shadowmask surface treatment | |
JPS6381730A (en) | Surface treating method for shadow mask | |
US3772103A (en) | Etch-back screening | |
JPS62108423A (en) | Manufacture of shadow mask | |
US5733163A (en) | Shadow mask including electron reflection layer and method for manufacturing the same | |
US3604081A (en) | Screening a color cathode-ray tube | |
JPH0364828A (en) | Surface treatment for shadow mask | |
JPS62274525A (en) | Manufacture of shadow mask | |
JPS6059625A (en) | Manufacture of color picture tube | |
JPS61143925A (en) | Method of manufacturing screening electrode for color cathode ray tube | |
JPS6353833A (en) | Surface treatment of shadow mask | |
JPS6313240A (en) | Color cathode-ray tube | |
JPH0467294B2 (en) | ||
JPS6358729A (en) | Surface treatment method for shadow mask |