JPH05129081A - Manufacture of electroluminescence element - Google Patents
Manufacture of electroluminescence elementInfo
- Publication number
- JPH05129081A JPH05129081A JP4114878A JP11487892A JPH05129081A JP H05129081 A JPH05129081 A JP H05129081A JP 4114878 A JP4114878 A JP 4114878A JP 11487892 A JP11487892 A JP 11487892A JP H05129081 A JPH05129081 A JP H05129081A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- transparent electrode
- transparent
- counter electrode
- light emitting
- 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.)
- Withdrawn
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 238000005401 electroluminescence Methods 0.000 title abstract 2
- 239000012212 insulator Substances 0.000 claims abstract description 18
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000000758 substrate Substances 0.000 claims description 12
- 238000007639 printing Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 238000010030 laminating Methods 0.000 claims 2
- 238000007650 screen-printing Methods 0.000 abstract description 7
- 229920005989 resin Polymers 0.000 description 12
- 239000011347 resin Substances 0.000 description 12
- 239000011230 binding agent Substances 0.000 description 9
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- CXWXQJXEFPUFDZ-UHFFFAOYSA-N tetralin Chemical compound C1=CC=C2CCCCC2=C1 CXWXQJXEFPUFDZ-UHFFFAOYSA-N 0.000 description 6
- 230000005684 electric field Effects 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- NNBZCPXTIHJBJL-UHFFFAOYSA-N decalin Chemical compound C1CCCC2CCCCC21 NNBZCPXTIHJBJL-UHFFFAOYSA-N 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- WVDDGKGOMKODPV-UHFFFAOYSA-N Benzyl alcohol Chemical compound OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000010408 film Substances 0.000 description 3
- 229920001973 fluoroelastomer Polymers 0.000 description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 210000003298 dental enamel Anatomy 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000012454 non-polar solvent Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000000059 patterning Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- PXXNTAGJWPJAGM-UHFFFAOYSA-N vertaline Natural products C1C2C=3C=C(OC)C(OC)=CC=3OC(C=C3)=CC=C3CCC(=O)OC1CC1N2CCCC1 PXXNTAGJWPJAGM-UHFFFAOYSA-N 0.000 description 2
- 239000008096 xylene Substances 0.000 description 2
- 229920003319 Araldite® Polymers 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- OWYWGLHRNBIFJP-UHFFFAOYSA-N Ipazine Chemical compound CCN(CC)C1=NC(Cl)=NC(NC(C)C)=N1 OWYWGLHRNBIFJP-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 235000019445 benzyl alcohol Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000006072 paste Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、文字，図形等の所定の
表示部分を螢光体の作用で発光させる電場発光素子の製
造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an electroluminescent device which causes a predetermined display portion such as characters and figures to emit light by the action of a fluorescent substance.
【０００２】[0002]
【従来の技術】電場発光素子は、透明電極と対向電極と
の間に螢光体層と誘電体層とからなる発光層を介装し、
前記透明電極と対向電極との間に交流電場を印加するこ
とによって、発光層の発光を行わしめるもので、各種の
機器における表示装置として広く用いられている。2. Description of the Related Art An electroluminescent device has a light-emitting layer composed of a fluorescent layer and a dielectric layer interposed between a transparent electrode and a counter electrode,
By applying an AC electric field between the transparent electrode and the counter electrode, the light emitting layer emits light, and is widely used as a display device in various devices.
【０００３】ここで、前述の電場発光素子を用いて表示
部分のみに限定して発光を行わせるには、当該表示部分
だけが透明電極と対向電極とが重なり合うように構成し
なければならない。このために、これら透明電極と対向
電極のうちの少なくとも一方または双方をエッチング等
の手段でパターニングさせる必要があり、このパターニ
ングが著しく面倒であり、コスト高となる欠点があると
共に、透明電極及び対向電極のリード線の引き廻しが困
難であるといった不都合等がある。このために、例えば
特公昭４４−２１０１９号公報に示されているように、
金属基板からなる対向電極上に形成された蛍光体層の表
面に低融点ほうろう層からなる絶縁体層を部分的に被着
し、該絶縁体層に覆われていない切り抜き部分に透明電
極を形成することにより、当該切り抜き部分を発光パタ
ーンとした電場発光素子も提案されている。Here, in order to limit the light emission to only the display portion by using the above-mentioned electroluminescent device, the transparent electrode and the counter electrode must be arranged to overlap each other only in the display portion. For this reason, it is necessary to pattern at least one or both of the transparent electrode and the counter electrode by means such as etching, and this patterning is extremely troublesome, and there is a drawback that the cost is high, and the transparent electrode and the counter electrode are opposite. There is an inconvenience that it is difficult to draw the lead wire of the electrode. To this end, for example, as disclosed in Japanese Patent Publication No. 44-21019,
An insulator layer made of a low melting point enamel layer is partially adhered to the surface of a phosphor layer formed on a counter electrode made of a metal substrate, and a transparent electrode is formed at a cutout portion not covered by the insulator layer. By doing so, an electroluminescent element in which the cutout portion has a light emission pattern is also proposed.
【０００４】[0004]
【発明が解決しようとする課題】ところで、前述した従
来技術のように、対向電極上の発光層における透明電極
側に絶縁体層を積層し、該絶縁体層を所定の表示パター
ンに対応する切り抜き状に形成してその部分に透明電極
を積層させるようにすると、この切り抜いた部分におけ
る発光層が透明電極を介して外部に露出した状態とな
り、電場発光素子が発光していない状態において、表示
部分である絶縁体層の切り抜き部分と、それ以外の絶縁
体層を形成した部分とのコントラストが現われて、美観
上好ましくない欠点がある。また、絶縁体層を低融点ほ
うろう層で形成しているために、その硬化・粘着に加熱
を必要とするが、この加熱の際に発光層を構成する樹脂
が溶解したり、螢光体が劣化したりしてその構造が破壊
されるおそれがある。そこで、この加熱時において十分
厳格に温度管理を行って発光層に悪影響を与えないよう
にする必要があり、温度制御が面倒となる不都合があ
る。このために、かかる方式の電場発光素子は実用上使
用されてはおらず、かかる電場発光素子は液晶等の表示
装置の光源としてしか利用されていないのが現状であ
る。By the way, as in the prior art described above, an insulating layer is laminated on the transparent electrode side of the light emitting layer on the counter electrode, and the insulating layer is cut out corresponding to a predetermined display pattern. When the transparent electrode is formed in a striped shape and the transparent electrode is laminated on that portion, the light emitting layer in the cutout portion is exposed to the outside through the transparent electrode, and the display portion is displayed when the electroluminescent element is not emitting light. A contrast between the cutout portion of the insulating layer and the portion where the other insulating layer is formed appears, which is an aesthetically unfavorable drawback. Further, since the insulating layer is formed of a low melting point enamel layer, heating is required for its curing and adhesion, but during this heating, the resin constituting the light emitting layer is dissolved and the fluorescent substance is There is a risk of deterioration and destruction of the structure. Therefore, it is necessary to sufficiently strictly control the temperature during the heating so as not to adversely affect the light emitting layer, which is a disadvantage in that the temperature control is troublesome. For this reason, the electroluminescent device of this type has not been practically used, and the electroluminescent device is currently used only as a light source of a display device such as a liquid crystal.
【０００５】本発明は、このような従来技術の実情にに
鑑みてなされたもので、表示部分を直接発光させるもの
において、製造が簡単で、透明電極や対向電極をパター
ニングしたりする面倒がなく、しかも非発光状態では表
示部分と表示のない部分との間に不必要なコントラスト
の発生を防止し得、優れた美観を呈するようにした電場
発光素子を提供することを目的とするものである。The present invention has been made in view of the circumstances of the prior art as described above, and in the case of directly emitting light to the display portion, the manufacturing is simple and there is no trouble of patterning the transparent electrode or the counter electrode. Moreover, it is an object of the present invention to provide an electroluminescent device which can prevent generation of unnecessary contrast between a display portion and a non-display portion in a non-light emitting state, and exhibits an excellent aesthetic appearance. ..
【０００６】[0006]
【課題を解決するための手段】上記した本発明の目的
は、透明電極基板上に蛍光体層を積層する工程と、この
蛍光体層上に誘電体層を積層する工程と、この誘電体層
上に所定の表示部分に対応する透し部を除いて絶縁体層
を部分的に印刷形成する工程と、前記透し部から露出す
る前記誘電体層及び前記絶縁体層上に対向電極を印刷形
成する工程とを順次行うことによって達成される。The above-mentioned object of the present invention is to laminate a phosphor layer on a transparent electrode substrate, laminate a dielectric layer on the phosphor layer, and form this dielectric layer. A step of partially printing and forming an insulating layer on the insulating layer excluding a transparent portion corresponding to a predetermined display portion; and printing a counter electrode on the dielectric layer and the insulating layer exposed from the transparent portion. This is achieved by sequentially performing the forming step.
【０００７】[0007]
【作用】本発明によれば、透明電極基板上に蛍光体層と
誘電体層を塗布や印刷等の簡易な方法で形成した後、該
誘電体層上に絶縁体層を例えばスクリーン印刷等の簡易
な方法で順次形成でき、その際、印刷マスクを用いて絶
縁体層に表示部分に対応する透し部を容易に形成するこ
とができる。そして、導電ペースト等をこの透し部内に
露出する誘電体層及び絶縁体層上に同じくスクリーン印
刷等の簡易な方法形成することによって、表示部分に対
向電極を形成することができる。従って、対向電極と透
明電極との間において、この表示部分だけに電場が作用
することになり、該表示部分を発光層によって直接発光
させることができるようになる。そして、絶縁体層は対
向電極側にあり、該絶縁体層と透明電極との間に発光層
が介在しているために、透明電極側の表面からは、絶縁
体層を形成した部分とそれが形成されていない部分（透
し部）との差異が現われることがなくなり、従って外観
が好ましいものとなる。According to the present invention, a phosphor layer and a dielectric layer are formed on a transparent electrode substrate by a simple method such as coating or printing, and then an insulator layer is formed on the dielectric layer by, for example, screen printing. They can be sequentially formed by a simple method, and at that time, a see-through portion corresponding to the display portion can be easily formed on the insulating layer by using a printing mask. Then, the counter electrode can be formed in the display portion by forming a conductive paste or the like on the dielectric layer and the insulating layer exposed in the transparent portion by the same simple method such as screen printing. Therefore, an electric field acts only on the display portion between the counter electrode and the transparent electrode, and the display portion can directly emit light by the light emitting layer. The insulator layer is on the counter electrode side, and since the light emitting layer is interposed between the insulator layer and the transparent electrode, from the surface on the transparent electrode side, the portion where the insulator layer is formed and The difference from the portion (transparent portion) in which is not formed does not appear, so that the appearance becomes preferable.
【０００８】[0008]
【実施例】以下、本発明の実施例を図に基づいて詳細に
説明する。まず、図１は本発明に係る電場発光素子の断
面図で、図中１は透明電極基板を示し、該透明電極基板
１には透明電極２が積層されており、この透明電極２に
は発光層３が形成されている。該発光層３はバインダ樹
脂中に蛍光体粉末を混入してなる蛍光体層３ａと高誘電
率の誘電物質からなる誘電体層３ｂとで形成され、該発
光層３は前記透明電極２の上に印刷や塗布等の手段によ
って形成されている。また、該発光層３の前記透明電極
２の形成側と反対側には絶縁体層４が積層されている。
該絶縁体層４は絶縁性の樹脂材からなり、該絶縁体層４
にはこの電場発光素子によって発光させようとする文
字，図形等の表示部分に沿って切り抜き状に形成した透
し部４ａが形成されている。そして、この透し部４ａと
該透し部４ａの周辺部分には導電ペースト等からなる対
向電極５が積層されている。さらに、透明電極２及び対
向電極５にはそれぞれ端子６，７が接続されており、こ
れら端子６，７間に交流電場を印加することによって、
所定の表示が直接発光するように構成されている。Embodiments of the present invention will now be described in detail with reference to the drawings. First, FIG. 1 is a cross-sectional view of an electroluminescent device according to the present invention. In the figure, 1 indicates a transparent electrode substrate, a transparent electrode 2 is laminated on the transparent electrode substrate 1, and the transparent electrode 2 emits light. Layer 3 has been formed. The light emitting layer 3 is formed of a phosphor layer 3a made by mixing phosphor powder in a binder resin and a dielectric layer 3b made of a dielectric material having a high dielectric constant. The light emitting layer 3 is formed on the transparent electrode 2. It is formed by means such as printing and coating. An insulator layer 4 is laminated on the side of the light emitting layer 3 opposite to the side where the transparent electrode 2 is formed.
The insulating layer 4 is made of an insulating resin material, and the insulating layer 4
A transparent portion 4a formed in a cutout shape is formed along the display portion of characters, figures, etc. which are to be made to emit light by this electroluminescent element. Then, the transparent portion 4a and the counter electrode 5 made of a conductive paste or the like are laminated on the peripheral portion of the transparent portion 4a. Further, terminals 6 and 7 are connected to the transparent electrode 2 and the counter electrode 5, respectively, and by applying an alternating electric field between these terminals 6 and 7,
The predetermined display is configured to emit light directly.
【０００９】本実施例は前述のように構成されるもの
で、端子６，７を交流電源（図示せず）に接続し、これ
ら端子６，７間に交流電場を印加すると、発光層３のう
ち、絶縁体層４を介さずに透明電極２と対向電極５とが
重畳する部分、即ち絶縁体層４における透し部４ａに対
応する部分のみが発光し、所定の表示パターンに沿って
直接に発光させることができるようになる。而して、発
光層３を構成する螢光体層３ａ及び誘電体層３ｂは不透
明な材質からなり、絶縁体層４及び対向電極５はこの発
光層３に対して透明電極２の裏面側に位置するために、
この電場発光素子に電場を印加しない非発光状態では、
表示パターンの形成部分である透し部４ａが形成されて
対向電極５を配設した部分とそれ以外の部分との差異が
透明電極基板１の表面側に現われることがなく、従って
該電場発光素子の表面に不必要なコントラストが生じる
不都合はない。This embodiment is constructed as described above. When the terminals 6 and 7 are connected to an AC power source (not shown) and an AC electric field is applied between these terminals 6 and 7, the light emitting layer 3 is Of these, only the portion where the transparent electrode 2 and the counter electrode 5 overlap without interposing the insulating layer 4, that is, only the portion corresponding to the transparent portion 4a in the insulating layer 4, emits light, and directly follows a predetermined display pattern. Will be able to emit light. Thus, the phosphor layer 3a and the dielectric layer 3b that form the light emitting layer 3 are made of an opaque material, and the insulator layer 4 and the counter electrode 5 are provided on the back surface side of the transparent electrode 2 with respect to the light emitting layer 3. To be located
In the non-luminous state where no electric field is applied to this electroluminescent element,
There is no difference on the surface side of the transparent electrode substrate 1 between the portion where the transparent portion 4a which is the display pattern forming portion is formed and the counter electrode 5 is arranged, and the other portion, and therefore the electroluminescent element. There is no inconvenience of producing unnecessary contrast on the surface of.
【００１０】次に、前述の電場発光素子を製造する方法
について説明する。まず、透明な合成樹脂材で透明電極
基板１を形成し、該透明電極基板１の表面全体に透明電
極２としてインジウム（Ｉｎ）とすず（Ｓｎ）との混合
酸化物等からなる導電粒子を薄膜上に塗布してこれを乾
燥させることによって形成し、蛍光体粉末をバインダ樹
脂として、例えばふっ素ゴムに混合してなる蛍光体層３
ａと、セラミック粉末をふっ素ゴム等のバインダ樹脂に
混合することによって形成される誘電体層３ｂとを順次
積層することによって、図２に示したように、発光層３
を透明電極２に積層する。Next, a method for manufacturing the aforementioned electroluminescent device will be described. First, the transparent electrode substrate 1 is formed of a transparent synthetic resin material, and conductive particles made of a mixed oxide of indium (In) and tin (Sn) are formed as a thin film on the entire surface of the transparent electrode substrate 1 as a transparent electrode 2. A phosphor layer 3 which is formed by applying it on top and drying it, and mixing the phosphor powder as a binder resin with, for example, fluororubber.
a and a dielectric layer 3b formed by mixing ceramic powder with a binder resin such as fluororubber, are sequentially laminated to form a light emitting layer 3 as shown in FIG.
Is laminated on the transparent electrode 2.
【００１１】次に前述のようにして得た積層体に、図３
に示したように、低誘電率の結着材と低誘電率の無機粉
末との混合物等からなる絶縁体層４を形成するが、この
絶縁体層４には発光層３によって発光されるべき表示部
分を切り抜き状にした透し部４ａを形成する必要がある
ので、透し部４ａの形状に対応する印刷マスクを用いて
スクリーン印刷等の手段で発光層３の誘電体層３ｂ上に
形成し、これを乾燥させるようにすれば、この絶縁体層
４に透し部４ａを容易に形成することができるようにな
る。ここで、絶縁体層４を印刷手段で形成するに当って
は、前述の混合物を溶融させて、ペースト状にする必要
があるが、これをペースト化する溶媒は前述の発光層３
を構成する誘電体層３ｂや螢光体層３ａにおけるバイン
ダ樹脂、特にふっ素ゴムのように分極率の高いバインダ
樹脂を使用する場合においては、該バインダ樹脂の構造
を破壊しないものから選択して使用しなければならな
い。このために、該絶縁体層４を形成するに当って使用
される溶媒としては、ベンゼン，トルエン，キシレン，
テトラリン，デカリン，ミネラルスピリット，ベンジル
アルコール等の無極性溶媒を使用するか、または溶媒を
使用せずに適宜の硬化剤を用いるようにすればよい。Next, the laminated body obtained as described above was subjected to the process shown in FIG.
As shown in FIG. 3, the insulating layer 4 made of a mixture of a low dielectric constant binder and a low dielectric constant inorganic powder is formed, and the light emitting layer 3 should emit light in this insulating layer 4. Since it is necessary to form the transparent portion 4a in which the display portion is cut out, it is formed on the dielectric layer 3b of the light emitting layer 3 by means of screen printing or the like using a printing mask corresponding to the shape of the transparent portion 4a. Then, if it is dried, the transparent portion 4a can be easily formed in the insulator layer 4. Here, in forming the insulator layer 4 by a printing means, it is necessary to melt the above mixture to form a paste, but the solvent for forming the paste is the above-mentioned light emitting layer 3
In the case of using a binder resin in the dielectric layer 3b or the fluorescent material layer 3a constituting the above, particularly a binder resin having a high polarizability such as fluororubber, it is selected from those which do not destroy the structure of the binder resin. Must. Therefore, as the solvent used for forming the insulator layer 4, benzene, toluene, xylene,
A non-polar solvent such as tetralin, decalin, mineral spirit, benzyl alcohol or the like may be used, or an appropriate curing agent may be used without using the solvent.
【００１２】具体的には、この絶縁体層４は例えば、誘
電率が４Ｆ／ｍ以下のアラルダイトＡＶ１３８（チバガ
イギー製）１０重畳部と硬化剤としてのハードナーＨＶ
９９８（チバガイギー製）３重畳部とを混合してなる無
溶媒性のペーストを使用して、スクリーン印刷により膜
厚が１０μｍ以上、好ましくは３０μｍ程度に形成すれ
ばよい。而して、この膜厚は誘電率の大小によって変化
させることができる。Specifically, the insulating layer 4 is, for example, an Araldite AV138 (manufactured by Ciba-Geigy) having a dielectric constant of 4 F / m or less and a hardener HV as a curing agent.
The film thickness may be formed by screen printing to have a film thickness of 10 μm or more, preferably about 30 μm, using a solventless paste formed by mixing 3 parts of 998 (manufactured by Ciba Geigy). Thus, this film thickness can be changed depending on the magnitude of the dielectric constant.
【００１３】そして、このスクリーン印刷を行った後、
これを格別加熱することなく、乾燥させることにより硬
化させて発光層３に積層した状態に固着することができ
るようになる。このように、絶縁体層４の構成成分によ
って発光層３の構造に悪影響を与えることなく、しかも
該絶縁体層４の形成時に加熱等の処理を行わないので、
この絶縁体層４を容易に、しかも円滑に形成することが
できるようになり、その表示部分をシャープに形成する
ことができるようになる。After performing this screen printing,
This can be cured by being dried and fixed to the light emitting layer 3 in a laminated state without being heated particularly. As described above, since the constituent components of the insulating layer 4 do not adversely affect the structure of the light emitting layer 3, and the heat treatment is not performed when the insulating layer 4 is formed.
This insulator layer 4 can be formed easily and smoothly, and the display portion can be formed sharply.
【００１４】前述のようにして絶縁体層４を形成した
後、第４図に示したように、該絶縁体層４のうち表示部
分である透し部４ａの形成部分とその周辺部分に導電ペ
ーストを印刷等の手段で形成し、これを乾燥することに
よって、対向電極５の形成を行う。この対向電極５も発
光層３と直接接触する状態に形成するものであるから、
該対向電極５が発光層３の構造を破壊しないようにする
必要がある。そこで、対向電極５としては飽和ポリエス
テル，シリコン樹脂等からなるバインダ樹脂中に銀，カ
ーボン等の導電粒子を混合してなるもので形成し、これ
をペースト状ににするために、ベンゼン，トルエン，キ
シレン，テトラリン，デカリン，ミネラルスピリット等
の無極性溶媒を使用すればよく、またはバインダ樹脂と
して無溶媒タイプのエポキシ樹脂や紫外線硬化樹脂等を
用いてもよい。After the insulating layer 4 is formed as described above, as shown in FIG. 4, the insulating layer 4 is electrically conductive to a portion where the transparent portion 4a, which is a display portion, is formed and its peripheral portion. The counter electrode 5 is formed by forming a paste by printing or the like and drying the paste. Since the counter electrode 5 is also formed so as to be in direct contact with the light emitting layer 3,
It is necessary to prevent the counter electrode 5 from destroying the structure of the light emitting layer 3. Therefore, the counter electrode 5 is formed by mixing conductive particles such as silver and carbon in a binder resin such as saturated polyester and silicon resin, and in order to make it into a paste, benzene, toluene, A nonpolar solvent such as xylene, tetralin, decalin or mineral spirit may be used, or a solventless epoxy resin or an ultraviolet curable resin may be used as the binder resin.
【００１５】さらに、透明電極２と対向電極５とにそれ
ぞれ端子６，７を接続することによって、図１に示した
ような電場発光素子を形成することができるようにな
る。ここで、透明電極２は透明電極基板１の全面に渡っ
て形成されているので、該透明電極２に格別のリード線
を引き廻す必要がなくなると共に、かかるリード線は抵
抗値の大きな透明材で形成しなければならない点を考慮
すれば、電流のロスを少なくでき、輝度の制御を容易に
行うことができるようになる。また、対向電極５と端子
７との間に形成されるリード部は対向電極５の形成と同
時に同材料によって形成することができ、同材料は固有
抵抗値を小さくすることが極めて容易なので、リード部
が細いパターンであってもリード部全体の抵抗値を小さ
くすることができ、電流のロス分を少なくすることがで
きる。Further, by connecting the terminals 6 and 7 to the transparent electrode 2 and the counter electrode 5, respectively, it becomes possible to form the electroluminescent device as shown in FIG. Here, since the transparent electrode 2 is formed over the entire surface of the transparent electrode substrate 1, it is not necessary to draw a special lead wire around the transparent electrode 2, and the lead wire is made of a transparent material having a large resistance value. Considering the points that must be formed, the loss of current can be reduced and the brightness can be easily controlled. Further, the lead portion formed between the counter electrode 5 and the terminal 7 can be formed of the same material at the same time as the formation of the counter electrode 5, and it is extremely easy to reduce the specific resistance value of the same material. Even if the portion has a thin pattern, the resistance value of the entire lead portion can be reduced, and the loss of current can be reduced.
【００１６】[0016]
【発明の効果】以上詳述したように、本発明によれば、
透明電極基板上に蛍光体層と誘電体層及び所定の表示部
分に対応する透し部を有する絶縁体層とを順次積層さ
せ、該透し部内の誘電体層及び絶縁体層上に対向電極を
形成するように構成したから、発光層と絶縁体層及び対
向電極の全てを塗布やスクリーン印刷等の簡易な手段で
形成することを可能にし、生産性を高めることができる
と共に、表示部分に対応する透し部の形状が印刷マスク
によって決定されるため、極めて容易に所定の表示パタ
ーンを有する電場発光素子を形成することができ、ま
た、透明電極の表面側には前述の絶縁体層を形成した部
分とそれが形成されていない部分との差異が現われるこ
とがなく、外観上好ましい電場発光素子を提供できる。As described in detail above, according to the present invention,
A phosphor layer, a dielectric layer, and an insulating layer having a transparent portion corresponding to a predetermined display portion are sequentially laminated on a transparent electrode substrate, and a counter electrode is provided on the dielectric layer and the insulating layer in the transparent portion. Since it is configured to form, it is possible to form all of the light emitting layer, the insulator layer and the counter electrode by a simple means such as coating or screen printing, and it is possible to improve the productivity and display the display portion. Since the shape of the corresponding transparent portion is determined by the print mask, it is possible to extremely easily form an electroluminescent element having a predetermined display pattern, and the above-mentioned insulator layer is formed on the surface side of the transparent electrode. There is no difference between the formed part and the part in which it is not formed, and it is possible to provide an electroluminescent device which is preferable in appearance.
【図１】本発明の一実施例を示す電場発光素子の断面図
である。FIG. 1 is a cross-sectional view of an electroluminescent device showing an embodiment of the present invention.
【図２】図１の電場発光素子の製造工程を示す断面図で
ある。FIG. 2 is a cross-sectional view showing a manufacturing process of the electroluminescent element of FIG.
【図３】図１の電場発光素子の製造工程を示す断面図で
ある。FIG. 3 is a cross-sectional view showing a manufacturing process of the electroluminescent element of FIG.
【図４】図１の電場発光素子の製造工程を示す断面図で
ある。FIG. 4 is a cross-sectional view showing a manufacturing process of the electroluminescent element of FIG.
１ 透明電極基板 ２ 透明電極 ３ 発光層 ４ 絶縁体層 ４ａ 透し部 ５ 対向電極 ６，７ 端子 1 Transparent Electrode Substrate 2 Transparent Electrode 3 Light-Emitting Layer 4 Insulator Layer 4a Transparent Portion 5 Counter Electrode 6, 7 Terminal
Claims (1)
体層上に誘電体層を積層する工程と、この誘電体層上に
所定の表示部分に対応する透し部を除いて絶縁体層を部
分的に印刷形成する工程と、前記透し部から露出する前
記誘電体層及び前記絶縁体層上に対向電極を印刷形成す
る工程とを順次行うことを特徴とする電場発光素子の製
造方法。A step of laminating a phosphor layer on a transparent electrode substrate, a step of laminating a dielectric layer on the phosphor layer, and an insulator except a transparent portion corresponding to a predetermined display portion on the dielectric layer. Manufacturing an electroluminescent device, characterized in that a step of partially printing and forming a layer and a step of printing and forming a counter electrode on the dielectric layer and the insulating layer exposed from the transparent portion are sequentially performed. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4114878A JPH05129081A (en) | 1992-05-07 | 1992-05-07 | Manufacture of electroluminescence element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4114878A JPH05129081A (en) | 1992-05-07 | 1992-05-07 | Manufacture of electroluminescence element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05129081A true JPH05129081A (en) | 1993-05-25 |
Family
ID=14648946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4114878A Withdrawn JPH05129081A (en) | 1992-05-07 | 1992-05-07 | Manufacture of electroluminescence element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05129081A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0855680A (en) * | 1994-08-12 | 1996-02-27 | Nec Kansai Ltd | Electroluminescent lamp and manufacture thereof |
| KR20020088908A (en) * | 2001-05-22 | 2002-11-29 | 주식회사 제이디텍 | Surface type heating body by conductive material |
-
1992
- 1992-05-07 JP JP4114878A patent/JPH05129081A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0855680A (en) * | 1994-08-12 | 1996-02-27 | Nec Kansai Ltd | Electroluminescent lamp and manufacture thereof |
| KR20020088908A (en) * | 2001-05-22 | 2002-11-29 | 주식회사 제이디텍 | Surface type heating body by conductive material |
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