JPH0121581B2 - - Google Patents
Info
- Publication number
- JPH0121581B2 JPH0121581B2 JP57119081A JP11908182A JPH0121581B2 JP H0121581 B2 JPH0121581 B2 JP H0121581B2 JP 57119081 A JP57119081 A JP 57119081A JP 11908182 A JP11908182 A JP 11908182A JP H0121581 B2 JPH0121581 B2 JP H0121581B2
- Authority
- JP
- Japan
- Prior art keywords
- emitter layer
- cathode
- display discharge
- oxide
- discharge tube
- 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
- 239000000758 substrate Substances 0.000 claims description 26
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 18
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 15
- 150000001342 alkaline earth metals Chemical class 0.000 claims description 15
- 229910052802 copper Inorganic materials 0.000 claims description 15
- 239000010949 copper Substances 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 5
- 150000004703 alkoxides Chemical class 0.000 claims description 4
- 238000009835 boiling Methods 0.000 claims description 4
- 150000001735 carboxylic acids Chemical class 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 150000005846 sugar alcohols Polymers 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 150000007942 carboxylates Chemical class 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 150000002739 metals Chemical class 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 group 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
- 150000001298 alcohols Chemical class 0.000 claims description 2
- 150000001299 aldehydes Chemical class 0.000 claims description 2
- 150000001413 amino acids Chemical class 0.000 claims description 2
- 125000004432 carbon atom Chemical group C* 0.000 claims description 2
- 229920003174 cellulose-based polymer Polymers 0.000 claims description 2
- 238000000151 deposition Methods 0.000 claims description 2
- 150000002148 esters Chemical class 0.000 claims description 2
- 125000005456 glyceride group Chemical group 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
- 239000003960 organic solvent Substances 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
- 229920000642 polymer 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
- 229940099259 vaseline Drugs 0.000 claims description 2
- 229920000570 polyether Polymers 0.000 claims 1
- 229910044991 metal oxide Inorganic materials 0.000 description 10
- 150000004706 metal oxides Chemical class 0.000 description 10
- BXWNKGSJHAJOGX-UHFFFAOYSA-N hexadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCO BXWNKGSJHAJOGX-UHFFFAOYSA-N 0.000 description 8
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 7
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 6
- 229910052754 neon Inorganic materials 0.000 description 5
- VBICKXHEKHSIBG-UHFFFAOYSA-N 1-monostearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 description 4
- 229910052788 barium Inorganic materials 0.000 description 4
- 229960000541 cetyl alcohol Drugs 0.000 description 4
- 238000010849 ion bombardment Methods 0.000 description 4
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 4
- 229910052783 alkali metal Inorganic materials 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 3
- 239000002585 base Substances 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- KBPLFHHGFOOTCA-UHFFFAOYSA-N 1-Octanol Chemical compound CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 description 2
- 229910015999 BaAl Inorganic materials 0.000 description 2
- 244000191761 Sida cordifolia Species 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- AESMDVCWMVZFRQ-UHFFFAOYSA-L barium(2+);butanoate Chemical compound [Ba+2].CCCC([O-])=O.CCCC([O-])=O AESMDVCWMVZFRQ-UHFFFAOYSA-L 0.000 description 2
- 230000015572 biosynthetic process Effects 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
- 239000000203 mixture Substances 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
- WWZKQHOCKIZLMA-UHFFFAOYSA-N octanoic acid Chemical compound CCCCCCCC(O)=O WWZKQHOCKIZLMA-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- -1 vaseline Substances 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
- 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
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 1
- 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 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose 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
- 230000006866 deterioration Effects 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
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-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
- 150000003839 salts Chemical class 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- MYWQGROTKMBNKN-UHFFFAOYSA-N tributoxyalumane Chemical compound [Al+3].CCCC[O-].CCCC[O-].CCCC[O-] MYWQGROTKMBNKN-UHFFFAOYSA-N 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)
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
なるアモルフア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つては、第１図に示す如く放
電電圧の低減及びスパツタ防止のために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。しかし、上述の
仕事関数が小さく、且つ耐イオン衝撃性を有する
エミツタ材料のうち、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３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つて、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１の表面
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放電管は輝度む
らによる表示性能の低下を余儀無くされていた。 Conventionally, in display discharge tubes that utilize light emitted by cold cathode discharge for display, Ni, Cr, etc. 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 made of Fe, W, or an alloy thereof. However, among the above-mentioned emitter materials having a small work function and ion bombardment resistance, alkali metal element oxides,
When a so-called oxide cathode 1 is formed using a metal oxide such as an oxide of an alkaline earth metal element or an oxide of a rare earth element as an emitter layer 3, 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, so that the negative glow 10 caused by the discharge is concentrated on the surface of the cathode 1, as shown in FIG. Cold cathode display discharge tubes equipped with the above-mentioned oxide cathode 1 were forced to suffer from deterioration in display performance due to brightness unevenness.
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つ
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
ツ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、（BaCO3）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
る活性化を行つてバリウム（Ba）を上記BaO層
内に遊離させている。 As a countermeasure to this problem, 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 reduce the electrical resistance. For example, as a method of liberating metal elements, as seen in the manufacturing process of neon pilot lamps,
Barium carbonate (BaCO 3 ) is attached to the cathode substrate, and this is melted and decomposed by high-frequency heating in a vacuum to form barium oxide (BaO), which is further activated by arc discharge to form the barium (Ba) into the above BaO layer. It is released inside.
ところが、上述のエミツタ層を薄く形成する方
法にあつては、スパツタによつて表示放電管の寿
命が短かいものとなつてしまい、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イス
プレイパネルでは加熱によつてパネル構造が変形
する虞れがある等の問題があつた。 However, in the method of forming a thin emitter layer as described above, the life of the display discharge tube is shortened due to spatter, and in the method that requires high-temperature heating, it is difficult to use a high-frequency heating device, etc. A special heating device is required, and there is a problem that the panel structure may be deformed by heating, especially in the case of a thin plasma display panel with a wide planar structure among cold cathode display discharge tubes.
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、従つて特別な加熱装置が不要
で、又扁平構造のプラズマデイスプレイパネルの
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, 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つた結果、エミツタ材料
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アス状と
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
エネルギーの組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ア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, emitter layer formation conditions, etc. As a result, we found that the emitter material contained at least one oxide of an alkaline earth metal element. They found that the conductivity of the emitter layer becomes good 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 consists of diffusion of copper into the alkali metal element oxide layer due to a combination of ionization energy between the alkaline earth metal element oxide and copper, and a metal oxide containing the above alkaline earth metal element oxide. This is thought to be because the emitter layer is amorphous and there are no grain boundaries within the layer, so copper diffusion is uniform without being prevented.
従つ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つて構成し、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アス層
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、パラフイン、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
銅によつて構成された陰極基体上に付着させ、加
熱することによつ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アス状のエミツ
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 a display discharge tube of the present invention, in a cold cathode for a display discharge tube 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, In addition, the emitter layer is an amorphous layer made of a material containing at least one kind of oxide of an alkaline earth metal element. 1 to 50% by weight of one or more organic metals selected from the group of metal alkoxides and carboxylates containing at least one kind, and one or more selected from the group of alcohols, esters, aldehydes, carboxylic acids, ketones, hydrocarbons, and terpenes. 5 to 95% by weight of organic solvents, higher alcohol-based high-boiling substances, glycerides, polyhydric alcohols with a boiling point of 150°C or more and 400°C or less, paraffin, vaseline, lanolin, rosin, cellulose-based polymer compounds, and carbon atoms of 8 or more. carboxylic acids, polyesters, polyaldehydes, polyalcohols, polyamide-based polymer compounds, amino acids, and one or more substances selected from the glycidol group to form a liquid or paste, and at least the part in contact with the emitter layer is made of copper. The organic metal is deposited on the cathode substrate thus constructed and heated to decompose the organic metal to form an amorphous emitter layer made of a material containing at least one oxide of an alkaline earth metal element. It is formed by depositing 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
イスプレイパネル（以下DC−PDP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、３はエミツタ層である。陰極基体２
は、Fe、Ni、Cr、Ｗ、Fe−Ni合金あるいは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鉢
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つている。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をアモルフアス状に
被着形成して陰極１としている。 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 this example, a cold cathode for a dot matrix type direct current plasma display panel (hereinafter referred to as DC-PDP) is shown. In the figure, 1 is a cathode, 2 is a cathode substrate, and 3 is an emitter layer. be. Cathode substrate 2
is Fe, Ni, Cr, W, Fe-Ni alloy or 42-
A mortar-shaped through hole 4 is bored in the part of the cathode base lower layer 2a made of a conventionally used cathode material such as No. 6 alloy, which is used for discharge, and a copper layer 2b is coated on the cathode base lower layer 2a. ing. 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３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％とオクチルアルコール65乃至77重量％
とグ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、デイツ
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、アモルフアス状の酸化バリウム（BaO）エ
ミツタ層３として陰極基体２の表面に固着するも
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。 When the oxide of the alkaline earth metal element is, for example, barium oxide (BaO), the method for forming the emitter layer 3 is as follows: 2 to 10% by weight of barium octylate, 5% by weight of turpentine oil, and 75 to 75% by weight of kerosene.
Liquid by mixing 83% by weight and 10% by weight of cetyl alcohol, or 2 to 10% by weight of barium lauryl oxide and 65 to 77% by weight of octyl alcohol.
1 to 5% by weight of glycerol stearate and 20% by weight of decyl alcohol are mixed to form a paste, and the paste is applied onto the cathode substrate 2 by spraying, dipping, coating, printing, etc., and heated to form a paste. Barium alkoxide is decomposed and fixed to the surface of the cathode substrate 2 as an amorphous barium oxide (BaO) 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.
尚、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
類示せば、MgO、BaO・SrO、BaLa2O4、もし
くはBaAl2O4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1.65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（BaSrO2層形成用）、酪
酸バリウム３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
（BaLa2O4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ト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重量％及びグリセロールステアレー
ト１重量％とを混合（BaAl2O4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、アモルフア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。 In addition, some 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 include MgO, BaO・SrO, BaLa 2 O 4 , Or BaAl 2 O 4 etc., and these metal oxides are respectively 10% by weight of magnesium caprate, 81.5% by weight of butyl alcohol, 8% by weight of stearyl alcohol, and 0.5% by weight of propyl cellulose.
(for MgO layer formation), barium butyrate 1.65% by weight and strontium propionate 1.17% by weight
mixed with 94.18% by weight of butyl alcohol and 3% by weight of cetyl alcohol (for forming two BaSrO layers), 3% by weight of barium butyrate and 8% by weight of lanthanum butyrate.
and 75% by weight of butyl alcohol, 10% by weight of cetyl alcohol, and 4% by weight of stearic acid (for forming 4 layers of BaLa 2 O), or 4% by weight of barium octylate, 5% by weight of aluminum butylate, and octyl alcohol. Alcohol 60% by weight and kerosene 20%
% by weight, and 5% by weight of lauryl alcohol, 5% by weight of cetyl alcohol, and 1% by weight of glycerol stearate (for forming BaAl 2 O 4 layers),
The mixture is made into a liquid or paste form, and then this mixture is deposited on the cathode substrate 2 and heated at 100°C or higher to form the alkaline earth metal element or a metal alkoxide or carboxylic acid containing at least one alkaline earth element. It is obtained by decomposing a salt 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の介挿によつて形成
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、Ar、He、Xe等の希ガスを主体
とした放電用ガスを封入している。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、すり鉢状の透孔４の内面全域にわたつ
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。 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 transparent front substrate, between which a cathode 1 and an anode 7 are crossed via a discharge space 9 formed by inserting a spacer 8. Further, the peripheries of both substrates 5 and 6 are sealed to form an airtight container, and a discharge gas mainly composed of rare gases such as Ne, Ar, He, and Xe is filled inside. 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 mortar-shaped through hole 4, and its light emitting area is different from that of the conventional example (second example).
This is approximately five times larger than the figure shown in Figure).
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
性の変化に伴つて陰極１と陽極７とが反転する。）
を組み込んだネオンパイロツ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
りなるアモルフアス状のエミツタ層３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, cathode 1 and anode 7 are reversed as the polarity of the power source changes.)
1 shows a side cross-sectional view of the main parts of a neon pilot lamp incorporating a neon pilot lamp. Electrodes 1 and 7 of this example are:
A cathode substrate 2 made of copper is coated with an amorphous emitter layer 3 made of a material containing at least one kind of oxide of the above-mentioned alkaline earth metal element, and is arranged in parallel and facing each other in a glass tube 13 filled with neon gas. has been done.
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つて構成した陰極
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アス状に被着形成し
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つて導伝性が良
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。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、又パネル自体を熱変形させる虞れがな
いので、扁平構造を有するプラズマデイスプレイ
パネルの製造方法としても適したものである。 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 a cathode substrate in which at least the portion in contact with the emitter layer is made of copper. A cold cathode for display discharge tubes can be obtained in which an emitter layer made of a material containing at least one type of substance is formed in an amorphous form, so even if the emitter layer is formed thick, the conductivity is good due to the diffusion of copper. Therefore, the operating voltage of display discharge tubes using this cathode can be reduced and the lifespan can be extended, and the negative glow caused by discharge can be generated widely and uniformly on the cathode.
It is possible to eliminate uneven brightness and improve the display performance of the display discharge tube. 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 made of a metal oxide containing at least one type of oxide, there is no need to use any special heating equipment, and there is no risk of thermal deformation of the panel itself, so it can be used as a plasma display panel with a flat structure. It is also suitable as a manufacturing method.
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。
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. The cross-sectional perspective view, FIGS. 4 and 5, are
FIG. 3 is 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, and FIG. 6 is a display discharge using the cold cathode for display discharge tubes according to another embodiment of the present invention. It is a side sectional view of the main part of a pipe. 1...Cold cathode for display discharge tube, 2...Cathode substrate,
2b... copper layer, 3... emitter layer.
Claims (1)
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つて構成し、
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つてアモ
ルフア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、パラフイン、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ア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,
A cold cathode for a display discharge tube, characterized in that the emitter layer is formed in an amorphous shape from a material containing at least one oxide of an alkaline earth 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 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, carboxylic acids with 8 or more carbon atoms, polyesters, polyaldehydes, polyalcohols, polyethers, polyamide-based polymers, amino acids at temperatures above ℃ and below 400℃ and one or more substances selected from the glycidol group to form a liquid or paste, and the organic metal is decomposed by depositing it on a cathode substrate whose at least the part in contact with the emitter layer is made of copper and heating it. A method for manufacturing a cold cathode for a display discharge tube, comprising forming an amorphous emitter layer made of a material containing at least one oxide of an alkaline earth metal element on the cathode substrate.
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 JPS599835A (en) | 1984-01-19 |
| JPH0121581B2 true 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) |
Families Citing this family (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 |
| JP2769933B2 (en) * | 1991-06-17 | 1998-06-25 | 株式会社ノリタケカンパニーリミテド | Direct current discharge display tube and composition for forming cathode thereof |
-
1982
- 1982-07-08 JP JP57119081A patent/JPS599835A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS599835A (en) | 1984-01-19 |
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