JPS599835A - Cold cathode for display discharge tube and its manufacturing method - Google Patents
Cold cathode for display discharge tube and its manufacturing methodInfo
- Publication number
- JPS599835A JPS599835A JP57119081A JP11908182A JPS599835A JP S599835 A JPS599835 A JP S599835A JP 57119081 A JP57119081 A JP 57119081A JP 11908182 A JP11908182 A JP 11908182A JP S599835 A JPS599835 A JP S599835A
- Authority
- JP
- Japan
- Prior art keywords
- emitter layer
- cathode
- discharge tube
- display discharge
- alkaline earth
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 239000000758 substrate Substances 0.000 claims abstract description 29
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052802 copper Inorganic materials 0.000 claims abstract description 17
- 239000010949 copper Substances 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 16
- 229910052751 metal Inorganic materials 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 150000004703 alkoxides Chemical class 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 238000009835 boiling Methods 0.000 claims abstract description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 3
- 150000001298 alcohols Chemical class 0.000 claims abstract description 3
- 150000001413 amino acids Chemical class 0.000 claims abstract description 3
- 150000002148 esters Chemical class 0.000 claims abstract description 3
- 125000005456 glyceride group Chemical group 0.000 claims abstract description 3
- 239000003960 organic solvent Substances 0.000 claims abstract description 3
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 17
- 150000001342 alkaline earth metals Chemical class 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 5
- 150000007942 carboxylates Chemical class 0.000 claims description 4
- 150000001735 carboxylic acids Chemical class 0.000 claims description 4
- 150000002739 metals Chemical class 0.000 claims description 4
- 150000005846 sugar alcohols Polymers 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims description 2
- CTKINSOISVBQLD-UHFFFAOYSA-N Glycidol Chemical compound OCC1CO1 CTKINSOISVBQLD-UHFFFAOYSA-N 0.000 claims description 2
- 239000004166 Lanolin Substances 0.000 claims description 2
- 229920001744 Polyaldehyde Polymers 0.000 claims description 2
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims description 2
- 150000001299 aldehydes Chemical class 0.000 claims description 2
- 125000004432 carbon atom Chemical group C* 0.000 claims description 2
- 229920002678 cellulose Polymers 0.000 claims description 2
- 239000001913 cellulose Substances 0.000 claims description 2
- 229930195733 hydrocarbon Natural products 0.000 claims description 2
- 150000002430 hydrocarbons Chemical class 0.000 claims description 2
- 150000002576 ketones Chemical class 0.000 claims description 2
- 229940039717 lanolin Drugs 0.000 claims description 2
- 235000019388 lanolin Nutrition 0.000 claims description 2
- 229940056211 paraffin Drugs 0.000 claims description 2
- 239000012188 paraffin wax Substances 0.000 claims description 2
- 229920002647 polyamide Polymers 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims description 2
- 229940043266 rosin Drugs 0.000 claims description 2
- 150000003505 terpenes Chemical class 0.000 claims description 2
- 235000007586 terpenes Nutrition 0.000 claims description 2
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims description 2
- -1 vaseline Substances 0.000 claims description 2
- 229940099259 vaseline Drugs 0.000 claims description 2
- 229920000570 polyether Polymers 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 13
- 229910044991 metal oxide Inorganic materials 0.000 abstract description 12
- 150000004706 metal oxides Chemical class 0.000 abstract description 11
- 238000010849 ion bombardment Methods 0.000 abstract description 5
- 125000002524 organometallic group Chemical group 0.000 abstract 2
- 150000001734 carboxylic acid salts Chemical class 0.000 abstract 1
- 238000009413 insulation Methods 0.000 abstract 1
- BXWNKGSJHAJOGX-UHFFFAOYSA-N hexadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCO BXWNKGSJHAJOGX-UHFFFAOYSA-N 0.000 description 8
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 6
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 4
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 4
- 229960000541 cetyl alcohol Drugs 0.000 description 4
- 229910052783 alkali metal Inorganic materials 0.000 description 3
- 229910052788 barium Inorganic materials 0.000 description 3
- AESMDVCWMVZFRQ-UHFFFAOYSA-L barium(2+);butanoate Chemical compound [Ba+2].CCCC([O-])=O.CCCC([O-])=O AESMDVCWMVZFRQ-UHFFFAOYSA-L 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 3
- KBPLFHHGFOOTCA-UHFFFAOYSA-N 1-Octanol Chemical compound CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- BQZDVIATLKPWCY-UHFFFAOYSA-K butanoate lanthanum(3+) Chemical compound [La+3].CCCC([O-])=O.CCCC([O-])=O.CCCC([O-])=O BQZDVIATLKPWCY-UHFFFAOYSA-K 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- MWKFXSUHUHTGQN-UHFFFAOYSA-N decan-1-ol Chemical compound CCCCCCCCCCO MWKFXSUHUHTGQN-UHFFFAOYSA-N 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000003350 kerosene Substances 0.000 description 2
- 229910052754 neon Inorganic materials 0.000 description 2
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- GLDOVTGHNKAZLK-UHFFFAOYSA-N octadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCCCO GLDOVTGHNKAZLK-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- TXNFKHHYTGEPRL-UHFFFAOYSA-N 1-[4-(trifluoromethylsulfanyl)phenyl]ethanone Chemical compound CC(=O)C1=CC=C(SC(F)(F)F)C=C1 TXNFKHHYTGEPRL-UHFFFAOYSA-N 0.000 description 1
- 229910015802 BaSr Inorganic materials 0.000 description 1
- RVBSRDWQHAOTNE-UHFFFAOYSA-N C(CCCCCCCCCCC)OCCCCCCCCCCCC.[Ba] Chemical compound C(CCCCCCCCCCC)OCCCCCCCCCCCC.[Ba] RVBSRDWQHAOTNE-UHFFFAOYSA-N 0.000 description 1
- 239000001293 FEMA 3089 Substances 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 229920003174 cellulose-based polymer Polymers 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- WWRYOAYBSQIWNU-UHFFFAOYSA-L magnesium;decanoate Chemical compound [Mg+2].CCCCCCCCCC([O-])=O.CCCCCCCCCC([O-])=O WWRYOAYBSQIWNU-UHFFFAOYSA-L 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- GOQYKNQRPGWPLP-UHFFFAOYSA-N n-heptadecyl alcohol Natural products CCCCCCCCCCCCCCCCCO GOQYKNQRPGWPLP-UHFFFAOYSA-N 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- WWZKQHOCKIZLMA-UHFFFAOYSA-N octanoic acid Chemical compound CCCCCCCC(O)=O WWZKQHOCKIZLMA-UHFFFAOYSA-N 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J17/00—Gas-filled discharge tubes with solid cathode
- H01J17/02—Details
- H01J17/04—Electrodes; Screens
- H01J17/06—Cathodes
- H01J17/066—Cold cathodes
Landscapes
- Gas-Filled Discharge Tubes (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、少なくともエミツタ層と接する部分が銅より
なる陰極基体上にアルカリ土類金属元素の酸化物を少な
くとも一種以上包含した材料よりなるアモルファス状の
エミツタ層を被着形成した表示放電管用冷陰極及びその
製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention provides an amorphous emitter layer made of a material containing at least one oxide of an alkaline earth metal element on a cathode substrate whose at least the portion in contact with the emitter layer is made of copper. The present invention relates to a formed cold cathode for a display discharge tube and a method for manufacturing the same.
従来より、冷陰極放電による発光を表示に利用する表示
放電管にあっては、第１図に示す如く放電電圧の低減及
びスパッタ防止のためにＮｉ、Ｃｒ、 Ｆｅ、 Ｗある
いはこれらの合金等よりなる陰極基体２上に、仕事関数
が小さく、且つ耐イオン衝撃性を有する材料よりなるエ
ミツタ層３を形成させた構造の陰極１を使用している。Conventionally, in display discharge tubes that utilize light emitted by cold cathode discharge for display, materials such as Ni, Cr, Fe, W, or alloys thereof have been used to reduce discharge voltage and prevent spatter, as shown in Figure 1. The cathode 1 has a structure in which an emitter layer 3 made of a material having a small work function and ion bombardment resistance is formed on a cathode base 2.
しかし。but.
上述の仕事関数が小さく、且つ耐イオン衝撃性を有する
エミッタ材料のうち、アルカリ金属元素酸化物、アルカ
リ土類金属元素の酸化物あるいは希土類元素の酸化物等
の金属酸化物をエミツタ層６とし所謂酸化物陰極１を形
成した場合には、上記金属酸化物が電気的に絶縁物であ
るため、形成されたエミツタ層３の電気抵抗が非常に高
くなって、放電電流の分布が不均一となり、そのため放
電による負グロー１０は、第２図に示す如く陰極１０表
面の放電が集中している部分にのみ発生し、上記酸化物
陰極１を具備した冷陰極表示数ｌ電管は輝度むらによる
表示性能の低下を余儀無くされていた。Among the emitter materials having a small work function and ion bombardment resistance, metal oxides such as alkali metal element oxides, alkaline earth metal element oxides, and rare earth element oxides are used as the emitter layer 6. When the oxide cathode 1 is formed, since the metal oxide is an electrical insulator, the electrical resistance of the formed emitter layer 3 becomes very high, and the distribution of the discharge current becomes uneven. Therefore, the negative glow 10 caused by the discharge occurs only in the area where the discharge is concentrated on the surface of the cathode 10, as shown in FIG. This resulted in a decline in performance.
この対策としては、エミツタ層を非常に薄く形成して電
気抵抗を低くする方法や、あるいは高温による金属酸化
物の溶融、分解及び活性化によってエミツタ層内に金属
元素を遊離させて電気抵抗を低下させる方法等が提案さ
れており、例えば金属元素を遊離させる方法としては、
ネオンパイロットランプの製造工程に於いてみられるよ
うに、炭酸バリウム（ＢａＣＯ５）を陰極基体に付着さ
せ、これを真空中で高周波加熱で溶融分解して酸化バリ
ウム（ＢａＯ）とし、更にアーク放電による活性化を行
ってバリウム（Ｂａ ）を上記ＢａＯ層内に遊離させて
いる。As a countermeasure for this, there are two methods: forming the emitter layer very thin to lower the electrical resistance, or melting, decomposing, and activating the metal oxide at high temperatures to liberate metal elements within the emitter layer to lower the electrical resistance. For example, methods for liberating metal elements include:
As seen in the manufacturing process of neon pilot lamps, barium carbonate (BaCO5) is deposited on the cathode substrate, melted and decomposed using high-frequency heating in vacuum to form barium oxide (BaO), and then activated by arc discharge. barium (Ba) is released into the BaO layer.
ところが、上述のエミツタ層を薄く形成する方法にあっ
ては、スパッタによって表示放電管の寿命が短かいもの
となってしまい、又、高温加熱を必要とする方法では、
高周波加熱装置等の加熱装置が特別に必要になり、特に
、冷陰極表示放電管のうちでも広い平面構造で薄型のプ
ラズマディスプレイパネルでは加熱によってパネル構造
が変形する虞れがある等の問題があった。However, with the above method of forming a thin emitter layer, the life of the display discharge tube is shortened due to sputtering, and with the method requiring high temperature heating,
A special heating device such as a high-frequency heating device is required, and there are problems such as the possibility that the panel structure may be deformed by heating, especially for cold cathode display discharge tubes that have a wide flat structure and thin plasma display panel. Ta.
本発明は以上の問題点を解決するためになされたもので
、仕事関数が小さく、且つイオン衝撃による摩耗が少な
いけれども電気的絶縁性を有する金属酸化物材料を、導
電性を良好ならしめた状態で陰極に導入し、該陰極を具
備した表示放電管の低電圧化及び長寿命化を図り、且つ
表示輝度むらを解消して表示性能を向上させるとともに
、上記表示放電管用冷陰極を製造するに際し、高温加熱
工程が必要なく、従って特別な加熱装置が不要で、又扁
平構造のプラズマディスプレイパネルの製造に適した製
造方法を提供することを目的とする。The present invention was made in order to solve the above problems, and is a metal oxide material that has a small work function and little wear due to ion bombardment, but has electrical insulating properties, and has good electrical conductivity. Introduced into the cathode to lower the voltage and extend the life of the display discharge tube equipped with the cathode, and improve the display performance by eliminating display brightness unevenness, and when manufacturing the cold cathode for the display discharge tube. It is an object of the present invention to provide a manufacturing method that does not require a high-temperature heating process, therefore does not require a special heating device, and is suitable for manufacturing a flat plasma display panel.
上記目的を達成するために各種金属酸化物材料及び陰極
基体、更にエミツタ層形成条件等を種々に組み合わせて
研究を行った結果、エミッタ材料としてアルカリ土類金
属元素の酸化物を少なくとも一種以上包含した金属酸化
物を選定し、且つ陰極基体の少なくともエミツタ層と接
する部分を銅となし、更に上記エミツタ層をアモルファ
ス状とした場合に、エミツタ層の導電性が良好となるこ
とを見い出し本発明を完成させたものである。これはア
ルカリ土類金属元素の酸化物と銅との電離エネルギーの
粗み合わせによる銅のアルカリ金属元素酸化物層への拡
散、更に、上記アルカリ土類金属元素の酸化物を包含し
た金属酸化物よりなるエミツタ層がアモルファス状で層
内に粒界が存在しないため、銅の拡散が防げられること
なく均一に行われるためと考えられる。In order to achieve the above objective, we conducted research using various combinations of various metal oxide materials, cathode substrates, and emitter layer formation conditions, and found that at least one oxide of an alkaline earth metal element was included as an emitter material. They found that the conductivity of the emitter layer improves when a metal oxide is selected, at least the part of the cathode substrate in contact with the emitter layer is made of copper, and the emitter layer is amorphous, and the present invention has been completed. This is what I did. This is due to the diffusion of copper into the alkali metal element oxide layer due to the rough matching of the ionization energies of the alkaline earth metal element oxide and copper, and furthermore, the metal oxide containing the above alkaline earth metal element oxide. This is thought to be because the emitter layer consisting of the above is amorphous and there are no grain boundaries within the layer, so copper diffusion is uniform without being prevented.
従って本発明の表示放電管用冷陰極は、陰極基体上にエ
ミツタ層を被着形成させた表示放電管用冷陰極に於いて
、陰極基体の少なくともエミツタ層と接する部分を銅に
よって構成し、且つエミツタ層をアルカリ土類金属元素
の酸化物を少なくとも一種以上包含した材料よりなるア
モルファス層とした構成を取るものであり、更に上記表
示放電管用冷陰極の製造方法として、アルカリ土類金属
元素を少なくとも一種以上包含した金属のアルコキシド
及びカルボン酸塩群から選定した一種以上の有機金属１
乃至５０重量％と、アルコール、エステル、アルデヒド
、カルボン酸、ケトン類、炭化水素及びテルペン類群か
ら選定した一種以上の有機溶媒５乃至９５重量％と、高
級アルコール系高沸点物、グリセリド、沸点が１５０℃
以上４００℃以下の多価アルコール、パラフィン、ワセ
リン、ラノリン、ロジン、セルローズ系高分子化合物、
炭素数８以上のカルボン酸、ポリエステル、ポリアルデ
ヒド、ポリアルコール、ポリアミド系高分子化合物、ア
ミノ酸及びグリシドール群から選定した一種以上の物質
とを混合して、液状あるいはペースト状とし、少なくと
もエミツタ層と接する部分が銅によって構成された陰極
基体上に付着させ、加熱することによって上記有機金属
を分解して、アルカリ土類金属元素の酸化物を少なくと
も一種以上包含した材料よりなるアモルファス状のエミ
ツタ層として上記陰極基体上に被着形成するものである
。Therefore, in the cold cathode for display discharge tubes of the present invention, in a cold cathode for display discharge tubes in which an emitter layer is formed on a cathode substrate, at least the portion of the cathode substrate in contact with the emitter layer is made of copper, and the emitter layer is made of copper. is an amorphous layer made of a material containing at least one kind of oxide of an alkaline earth metal element; One or more organic metals selected from the group of alkoxides and carboxylates of the included metals 1
5 to 50% by weight of one or more organic solvents selected from the group of alcohols, esters, aldehydes, carboxylic acids, ketones, hydrocarbons, and terpenes, higher alcohol-based high-boiling substances, glycerides, boiling points of 150 ℃
Polyhydric alcohols, paraffin, vaseline, lanolin, rosin, cellulose-based polymer compounds with temperatures above 400°C,
One or more substances selected from the group of carboxylic acids having 8 or more carbon atoms, polyesters, polyaldehydes, polyalcohols, polyamide polymer compounds, amino acids, and glycidol are mixed to form a liquid or paste, and the mixture is in contact with at least the emitter layer. The organic metal is decomposed by depositing it on a cathode substrate whose portion is made of copper and heating to form an amorphous emitter layer made of a material containing at least one oxide of an alkaline earth metal element. It is formed on the cathode substrate.
以下図面に基づき本発明の一実施例を説明する。An embodiment of the present invention will be described below based on the drawings.
第３図は、本発明の一実施例に係る表示放電管用冷陰極
の断面斜視図である。本実施例の場合は、ドツトマトリ
クスタイプの直流型プラズマディスプレイパネル（以下
ＤＣＰＤＰという）用冷陰極を示しており、図に於いて
、１は陰極、２は陰極基体、６はエミツタ層である。FIG. 3 is a cross-sectional perspective view of a cold cathode for a display discharge tube according to an embodiment of the present invention. In the case of this embodiment, a cold cathode for a dot matrix type direct current plasma display panel (hereinafter referred to as DCPDP) is shown, and in the figure, 1 is a cathode, 2 is a cathode substrate, and 6 is an emitter layer.
陰極基体２は、Ｆｅ、 Ｎｉ、 Ｃｒ、 Ｗ、 Ｆｅ−
Ｎｉ 合金あルイは４２−６合金等従来より使用され
ている陰極材料よりなる陰極基体下層２ａの放電に供す
る部分にすり林状の透孔４を穿設し、上記陰極基体下層
２ａ上に銅層２ｂを被覆した構成となっている。更に銅
層２ｂ上にアルカリ土類金属元素の酸化物を包含した材
料よりなるエミツタ層３をアモルファス状に被着形成し
て陰極１としている。The cathode substrate 2 is made of Fe, Ni, Cr, W, Fe-
The Ni alloy is made of a conventionally used cathode material such as 42-6 alloy, and has a forest-like through hole 4 formed in the part of the cathode substrate lower layer 2a used for discharge, and copper is formed on the cathode substrate lower layer 2a. It has a structure in which the layer 2b is covered. Furthermore, an emitter layer 3 made of a material containing an oxide of an alkaline earth metal element is deposited in an amorphous form on the copper layer 2b to form the cathode 1.
上記エミツタ層６の形成方法としては、アルカリ土類金
属元素の酸化物が例えば酸化バリウム（ＢａＯ）の場合
には、バリウムオクチラート２乃至１０重量％とテレピ
ン油５重量％及び灯油７５乃至８３重量％とセチルアル
コール１０重量％とを混合して液状、あるいはバリウム
ラウリルオキシド２乃至１０重量％とオクチルア＃ ニ
ア−ｐｖ ６５ 乃至７７ ＴＬ量％トクリセロールス
テアレート１乃至５重量％及びデシルアルコール２０重
量％とを混合してペースト状とし、上記陰極基体２上に
吹き付け、ディップ、塗布あるいは印刷等の方法で付着
させ、これを加熱して上記バリウムのアルコキシドを分
解しく一アーモルファス状の酸化バリウム（ＢａＯ）エ
ミツタ層３として陰極基体２０表面に固着するものであ
る。ただし、上述の分解に要する加熱温度は１００℃以
上あれば十分であり、ＤＣ−ＰＤＰの製造工程に於ける
作業温度（４００〜６００℃）を利用することができる
。The method for forming the emitter layer 6 includes, for example, when the oxide of the alkaline earth metal element is barium oxide (BaO), 2 to 10% by weight of barium octylate, 5% by weight of turpentine oil, and 75 to 83% by weight of kerosene. % and cetyl alcohol 10% by weight, or liquid form by mixing barium lauryl oxide 2 to 10% by weight and octyl alcohol 65 to 77 TL amount% tocrycerol stearate 1 to 5% by weight and decyl alcohol 20% by weight. The mixture is mixed to form a paste, which is deposited on the cathode substrate 2 by spraying, dipping, coating, or printing, and heated to decompose the barium alkoxide. ) It is fixed to the surface of the cathode substrate 20 as the emitter layer 3. However, it is sufficient that the heating temperature required for the above-mentioned decomposition is 100° C. or more, and the working temperature (400 to 600° C.) in the manufacturing process of DC-PDP can be used.
同、更に上記以外のアルカリ土類金属元素の酸化物ある
いはアルカリ土類金属元素の酸化物を少なくとも一種以
上包含した金属酸化物の例を数種顕示せば、ＭｇＯＸＢ
ａＯ−８ｒＯ、ＢａＬａ２０ａ、もしくはＢａＡ １２
０ａ等があげられ、これらの金属酸化物はそれぞれカプ
リン酸マグネシウム１０重量％とブチルアルコール８１
．５重量％と、ステアリルアルコール８重量％及びプロ
ピルセルローズ０，５重量％とを混合（ＭｇＯ層形成用
）、酪酸バリウム１６５重量％及びプロピオン酸ストロ
ンチウム１．１７重量％とブチルアルコール９４．１８
重量％とセチルアルコール３重量％とを混合（ＢａＳｒ
Ｏ２層形成用）、酪酸バリウム６重量％及び酪酸ランタ
ン８重量％と、ブチルアルコール７５重量％と、セチル
アルコール１０重量％及びステアリン酸４重量％とを混
合（ＢａＬａ２０ａ層形成用）もしくは、バリウムオク
チラート４重量％及びアルミニウムブチラード５重量％
と、オクチルアルコール６０重量％及び灯油２０重量％
と、ラウリルアルコール５重量％、セチルアルコール５
ｍ１ＪＬ％及ヒクリセロールステアレート１重量％とを
混合（ＢａＡｌｚ０４層形成用）して、液状あるいはペ
ースト状とし、次いでこの混合物を陰極基体２上に付着
させ、これを１００℃以上で加熱して上記アルカリ土類
金属元素あるいはアルカリ土類元素を少なくとも一種以
上包含した金属のアルコキシドあるいはカルボン酸塩を
分解して得られ、アモルファス状のエミツタ層として陰
極基体２上に被着形成される。Furthermore, several examples of oxides of alkaline earth metal elements other than those mentioned above or metal oxides containing at least one kind of oxide of alkaline earth metal elements are MgOXB.
aO-8rO, BaLa20a, or BaA 12
0a, etc., and these metal oxides each contain 10% by weight of magnesium caprate and 81% by weight of butyl alcohol.
．． 5% by weight, 8% by weight of stearyl alcohol and 0.5% by weight of propyl cellulose (for forming MgO layer), 165% by weight of barium butyrate, 1.17% by weight of strontium propionate and 94.18% by weight of butyl alcohol.
% by weight and 3% by weight of cetyl alcohol (BaSr
6% by weight of barium butyrate and 8% by weight of lanthanum butyrate, 75% by weight of butyl alcohol, 10% by weight of cetyl alcohol and 4% by weight of stearic acid (for forming a BaLa20a layer), or a mixture of 6% by weight of barium butyrate and 8% by weight of lanthanum butyrate (for forming a BaLa20a layer); 4% by weight of lato and 5% by weight of aluminum butyrad
and 60% by weight of octyl alcohol and 20% by weight of kerosene.
and 5% by weight of lauryl alcohol and 5% by weight of cetyl alcohol.
m1JL% and 1% by weight of hyclycerol stearate (for forming the BaAlz04 layer) are mixed to form a liquid or paste, and then this mixture is deposited on the cathode substrate 2 and heated at 100°C or higher to form the above. It is obtained by decomposing an alkaline earth metal element or a metal alkoxide or carboxylate containing at least one alkaline earth element, and is deposited on the cathode substrate 2 as an amorphous emitter layer.
第４図及び第５図は、第３図の表示放電管用冷陰極１を
、組み込んだＤＣ−ＰＤＰの要部側断面図及び要部上面
図である。図に於いて、５は背面基板、６は透光性の前
面基板であり、両基板間に陰極１及び陽極７をスペーサ
８の介挿によって形成した放電空間９を介して交叉させ
て配設し、更に両基板５及び６の周囲を封止して気密容
器となし、内部にＮｅ、 ＡｒＸＨｅ、 Ｘｅ等の希ガ
スを主体とした放電用ガスを封入している。4 and 5 are a side sectional view and a top view of a main part of a DC-PDP incorporating the cold cathode 1 for a display discharge tube shown in FIG. 3. In the figure, 5 is a rear substrate, and 6 is a translucent front substrate, between which a cathode 1 and an anode 7 are intersected with a discharge space 9 formed by inserting a spacer 8. Furthermore, the periphery of both substrates 5 and 6 is sealed to form an airtight container, and a discharge gas mainly composed of rare gases such as Ne, ArXHe, and Xe is filled inside.
前面基板６側から目視した負グロー１０の発生状態は第
５図に示す如く、すり林状の透孔４の内面全域にわたっ
て均一に分布し、その発光面積は、従来例（第２図）に
くらべ約５倍程度に拡大している。As shown in FIG. 5, the negative glow 10 generated when visually observed from the front substrate 6 side is uniformly distributed over the entire inner surface of the forest-like through hole 4, and its light emitting area is equal to that of the conventional example (FIG. 2). This is approximately five times larger than before.
第６図は本発明の他の実施例であり、一端にそれぞれ導
入線１１及び１２を接続した一対の電極１及び７（直流
駆動の場合は一方が陰極１、他方が陽極７となり、交流
駆動の場合には、電源の極性の変化に伴って陰極１と陽
極７とが反転する。）を組み込んだネオンパイロットラ
ンプの要部側断面図を示している。本実施例の電極１及
び７は、銅製の陰極基体２を上述したアルカリ土類金属
元素の酸化物を少なくとも一種以上包含した材料よりな
るアモルファス状のエミツタ層５で被覆したものであり
、ネオンガス封入のガラス管１３内に平行に対向配置さ
れている。FIG. 6 shows another embodiment of the present invention, in which a pair of electrodes 1 and 7 are connected to one end with lead-in wires 11 and 12, respectively (in the case of DC drive, one becomes the cathode 1 and the other becomes the anode 7; In this case, the cathode 1 and the anode 7 are reversed as the polarity of the power source changes. In the electrodes 1 and 7 of this embodiment, a cathode substrate 2 made of copper is coated with an amorphous emitter layer 5 made of a material containing at least one of the oxides of the above-mentioned alkaline earth metal elements, and is filled with neon gas. are arranged in parallel and facing each other in the glass tube 13 of.
以上述べた如く本発明によれば、少なくともエミツタ層
と接する部分を銅に′よって構成した陰極基体上に仕事
関数が小さく、イオン衝撃に強いけれども電気的絶縁性
を有するアルカリ土類金属元素の酸化物を少なくとも一
種以上包含した材料よりなるエミツタ層をアモルファス
状に被着形成した表示放電管用冷陰極が得られるので、
エミツタ層を厚く形成しても銅の拡散によって導伝性が
良好に保たれるため、この陰極を使用した表示放電管の
動作電圧を低減させ、且つ寿命を長くすることができる
とともに、放電による負グローを陰極上に広く、均一に
発生させることができるため、輝度ムラを解消し表示放
電管の表示性能を向上させることができる。As described above, according to the present invention, an alkaline earth metal element having a small work function, strong against ion bombardment, and electrically insulating properties is oxidized on the cathode substrate, in which at least the portion in contact with the emitter layer is made of copper. Since it is possible to obtain a cold cathode for a display discharge tube in which an amorphous emitter layer made of a material containing at least one substance is formed,
Even if the emitter layer is formed thickly, good conductivity is maintained due to copper diffusion, so the operating voltage of display discharge tubes using this cathode can be reduced and the lifespan can be extended. Since negative glow can be generated widely and uniformly on the cathode, uneven brightness can be eliminated and the display performance of the display discharge tube can be improved.
更に、本発明の方法によれば、アルカリ土類金属元素を
少なくとも一種以上包含した金属のアルコキシドあるい
はカルボン酸塩を表示放電管の製造工程に於ける作業温
度による加熱で分解してアルカリ金属元素の酸化物を少
なくとも一種以上包含した金属酸化物とすることができ
るため、何等特別な加熱装置を使用する必要がなく、某
ハネル自体を熱変形させる虞れが々いので、扁平構造を
有するプシ×マディスプレイパネルの製造方法としても
適したものである。Further, according to the method of the present invention, metal alkoxides or carboxylates containing at least one alkaline earth metal element are decomposed by heating at operating temperatures in the manufacturing process of display discharge tubes, and the alkali metal elements are decomposed. Since it can be a metal oxide containing at least one type of oxide, there is no need to use any special heating equipment, and there is a high risk of thermal deformation of a certain panel itself. This method is also suitable as a method for manufacturing display panels.
第１図及び第２図は従来の表示放電管用冷陰極を使用し
た表示放電管の要部側断面図及び要部上面図、第３図は
本発明の一実施例に係る表示放電管用冷陰極の断面斜視
図、第４図及び第５図は、第３図の表示放電管用冷陰極
を使用した表示放電管の要部側断面図及び要部上面図、
第６図は本発明の他の実施例に係る表示放電管用冷陰極
を使用した表示放電管の要部側断面図である。
１・・・表示放電管用冷陰極 ２・・・陰極基体２ｂ
・・・銅層 ３・・・エミツタ層特許出願人 岡
谷電機産業株式会社技研科学株式会社1 and 2 are a side sectional view and a top view of the main parts of a display discharge tube using a conventional cold cathode for display discharge tubes, and FIG. 3 is a cold cathode for display discharge tubes according to an embodiment of the present invention. 4 and 5 are a side sectional view and a top view of the main parts of a display discharge tube using the cold cathode for display discharge tubes shown in FIG.
FIG. 6 is a sectional side view of a main part of a display discharge tube using a cold cathode for a display discharge tube according to another embodiment of the present invention. 1...Cold cathode for display discharge tube 2...Cathode base 2b
...Copper layer 3...Emitter layer Patent applicant Okaya Electric Industry Co., Ltd. Giken Science Co., Ltd.
Claims (1)
管用冷陰極に於いて、陰極基体の少なくともエミツタ層
と接する部分を銅によって構成し、且つエミツタ層をア
ルカリ土類金属元素の酸化物を少なくとも一種以上包含
した材料によってアモルファス状に形成したことを特徴
とする表示放電管用冷陰極。 ２）陰極基体上にエミツタ層を被着形成させた表示放電
管用冷陰極の製造方法に於いて、アルカリ土類金属元素
を包含した金属のアルコキシド及びカルボン酸塩群から
選定した一種以上の有機金属１乃至５０重量％と、アル
コール、エステル、アルデヒド、カルボン酸、ケトン類
、炭化水素及びテルペン類群から選定した一種以上の有
機溶媒５乃至９５重量％と、高級アルコール系高沸点物
、グリセリド、沸点が１５０℃以上４００℃以下の多価
アルコール、パラフィン、ワセリン、ラノリン、ロジン
、セルローズ系高分子化合物、炭素数８以上のカルボン
酸、ポリエステル、ポリアルデヒド、ポリアルコール、
ポリエーテル、ポリアミド系高分子化合物、アミノ酸及
びグリシドール群から選定した一種以上の物質とを混合
して、液状あるいはペースト状とし、少なくともエミツ
タ層と接する部分が銅よりなる陰極基体上に付着させ加
熱することにより上記有機金属を分解して、アルカリ土
類金属元素の酸化物を少なくとも一種以上包含した材料
よりなるアモルファス状のエミツタ層として上記陰極基
体上に被着形成することを特徴とした表示放電管用冷陰
極の製造方法。[Scope of Claims] 1) In a cold cathode for a display discharge tube in which an emitter layer is formed on a cathode substrate, at least a portion of the cathode substrate in contact with the emitter layer is made of copper, and the emitter layer is made of alkaline earth. 1. A cold cathode for a display discharge tube, characterized in that the cold cathode is formed in an amorphous form from a material containing at least one type of oxide of a similar metal element. 2) In a method for manufacturing a cold cathode for a display discharge tube in which an emitter layer is deposited on a cathode substrate, one or more organic metals selected from the group of alkoxides and carboxylates of metals containing alkaline earth metal elements. 1 to 50% by weight, 5 to 95% by weight of one or more organic solvents selected from the group of alcohols, esters, aldehydes, carboxylic acids, ketones, hydrocarbons, and terpenes, higher alcohol-based high-boiling substances, glycerides, and Polyhydric alcohol, paraffin, vaseline, lanolin, rosin, cellulose polymer compound, carboxylic acid having 8 or more carbon atoms, polyester, polyaldehyde, polyalcohol, temperature of 150°C to 400°C,
One or more substances selected from the group of polyethers, polyamide-based polymers, amino acids, and glycidol are mixed to form a liquid or paste, and the mixture is deposited on a cathode substrate whose at least the portion in contact with the emitter layer is made of copper and heated. A display discharge tube characterized in that an amorphous emitter layer made of a material containing at least one oxide of an alkaline earth metal element is formed on the cathode substrate by decomposing the organic metal. Method for manufacturing cold cathodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57119081A JPS599835A (en) | 1982-07-08 | 1982-07-08 | Cold cathode for display discharge tube and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57119081A JPS599835A (en) | 1982-07-08 | 1982-07-08 | Cold cathode for display discharge tube and its manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS599835A true JPS599835A (en) | 1984-01-19 |
| JPH0121581B2 JPH0121581B2 (en) | 1989-04-21 |
Family
ID=14752403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57119081A Granted JPS599835A (en) | 1982-07-08 | 1982-07-08 | Cold cathode for display discharge tube and its manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS599835A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60195839A (en) * | 1984-03-16 | 1985-10-04 | Okaya Denki Sangyo Kk | Cathode for display discharge tube |
| JPH04368747A (en) * | 1991-06-17 | 1992-12-21 | Noritake Co Ltd | Dc type discharge display tube and cathode forming composition thereof |
| US5235887A (en) * | 1990-03-22 | 1993-08-17 | Citizen Watch Co., Ltd. | Cutter apparatus |
-
1982
- 1982-07-08 JP JP57119081A patent/JPS599835A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60195839A (en) * | 1984-03-16 | 1985-10-04 | Okaya Denki Sangyo Kk | Cathode for display discharge tube |
| US5235887A (en) * | 1990-03-22 | 1993-08-17 | Citizen Watch Co., Ltd. | Cutter apparatus |
| JPH04368747A (en) * | 1991-06-17 | 1992-12-21 | Noritake Co Ltd | Dc type discharge display tube and cathode forming composition thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0121581B2 (en) | 1989-04-21 |
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