JP2908645B2 - Edge-emitting EL element head - Google Patents
Edge-emitting EL element headInfo
- Publication number
- JP2908645B2 JP2908645B2 JP26135492A JP26135492A JP2908645B2 JP 2908645 B2 JP2908645 B2 JP 2908645B2 JP 26135492 A JP26135492 A JP 26135492A JP 26135492 A JP26135492 A JP 26135492A JP 2908645 B2 JP2908645 B2 JP 2908645B2
- Authority
- JP
- Japan
- Prior art keywords
- emitting
- edge
- adhesive
- element head
- light
- 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 - Lifetime
Links
- 239000000853 adhesive Substances 0.000 claims description 29
- 230000001070 adhesive effect Effects 0.000 claims description 29
- 239000000758 substrate Substances 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 2
- 238000005401 electroluminescence Methods 0.000 description 83
- 230000003287 optical effect Effects 0.000 description 14
- 239000011521 glass Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 239000010409 thin film Substances 0.000 description 6
- 238000001723 curing Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 4
- 229910052984 zinc sulfide Inorganic materials 0.000 description 4
- 239000005083 Zinc sulfide Substances 0.000 description 3
- 239000012298 atmosphere Substances 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
- 239000011572 manganese Substances 0.000 description 3
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000059 patterning Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 239000003522 acrylic cement Substances 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000003955 hot wall epitaxy Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 238000001451 molecular beam epitaxy Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000000016 photochemical curing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000001552 radio frequency sputter deposition Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
Description
【０００１】[0001]
【産業上の利用分野】本発明は、多数の端面発光型ＥＬ
素子を連設した端面発光型ＥＬ素子ヘッドに関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a large number of edge-emitting EL devices.
The present invention relates to an edge-emitting EL element head in which elements are connected in series.
【０００２】[0002]
【従来の技術】近年、実用化された発光素子の一つとし
てＥＬ(Electro Luminescence)素子があるが、これは不
足しがちな発光輝度の改善が要望されている。そこで、
表面が発光する従来のＥＬ素子に比較して百倍程の発光
輝度を示す端面発光型ＥＬ素子が開発された。この端面
発光型ＥＬ素子とは、活性元素を含む硫化亜鉛等からな
る薄膜状の活性層を誘電体層で囲んで光導波路を形成
し、この誘電体層の外面に相対向する電極層を形成した
もので、これらの電極層間に高電圧パルスを通電すると
活性層の端面から極扁平なビーム光を出射するようにな
っている。そこで、このような端面発光型ＥＬ素子を絶
縁基板上に連設することで、電子写真装置のラインヘッ
ドである端面発光型ＥＬ素子ヘッドを形成することがで
きる。2. Description of the Related Art In recent years, an EL (Electro Luminescence) element is one of the light emitting elements that have been put into practical use, and there is a demand for an improvement in emission luminance, which tends to be insufficient. Therefore,
An edge-emitting EL device has been developed which has a light emission luminance which is about 100 times higher than that of a conventional EL device whose surface emits light. This edge-emitting EL element is such that an optical waveguide is formed by surrounding a thin active layer made of zinc sulfide or the like containing an active element with a dielectric layer, and an opposing electrode layer is formed on the outer surface of the dielectric layer. When a high voltage pulse is applied between these electrode layers, an extremely flat light beam is emitted from the end face of the active layer. Therefore, by arranging such an edge-emitting EL element continuously on an insulating substrate, an edge-emitting EL element head that is a line head of an electrophotographic apparatus can be formed.
【０００３】しかし、このような端面発光型ＥＬ素子ヘ
ッドを実施した場合、端面発光型ＥＬ素子の駆動パルス
は高電圧なので雰囲気中の湿度が高いと電極層間などに
スパークが発生して各部に破壊が生じることがあり、環
境ガスの接触によって劣化も進行する。そこで、上述の
ような課題を解決するため、本出願人は端面発光型ＥＬ
素子を被うカバー部材を端面発光型ＥＬ素子ヘッドに取
付け、このカバー部材の内部空間にシリコンオイル等の
防湿剤を封入することを提案した。However, when such an edge-emitting EL element head is implemented, since the driving pulse of the edge-emitting EL element is a high voltage, if the humidity in the atmosphere is high, sparks are generated between the electrode layers and the like, and each part is destroyed. May occur, and the deterioration proceeds due to contact with the environmental gas. In order to solve the above-mentioned problems, the present applicant has developed an edge-emitting EL device.
It has been proposed that a cover member for covering the element be mounted on an edge-emitting EL element head, and a moisture-proof agent such as silicone oil be sealed in the inner space of the cover member.
【０００４】そこで、このような構造の端面発光型ＥＬ
素子ヘッドの第一の従来例として、本出願人が実開平4-
64140 号公報として出願した端面発光型ＥＬ素子ヘッド
を図２及び図３に基づいて説明する。まず、この端面発
光型ＥＬ素子ヘッド１の端面発光型ＥＬ素子２は、図３
に例示するように、マンガンなどの活性元素を含む硫化
亜鉛等からなる薄膜状の活性層３を上下から囲む誘電体
層４，５の上下面に電極層６，７を形成した構造となっ
ており、これらの電極層６，７に導通するコモン電極８
とブロック電極９とを所定パターンで形成して端面発光
型ＥＬ素子２をガラス基板１０の上に連設することで端
面発光型ＥＬ素子ヘッド１を形成している。Accordingly, an edge-emitting type EL having such a structure is described.
As a first conventional example of an element head, the present applicant has
An edge-emitting EL element head filed as Japanese Patent No. 64140 will be described with reference to FIGS. First, the edge emitting EL element 2 of the edge emitting EL element head 1 is shown in FIG.
The electrode layers 6 and 7 are formed on the upper and lower surfaces of dielectric layers 4 and 5 surrounding a thin-film active layer 3 made of zinc sulfide or the like containing an active element such as manganese from above and below. And a common electrode 8 conducting to these electrode layers 6 and 7.
The edge emitting EL element head 1 is formed by forming the edge emitting EL element 2 in a predetermined pattern and connecting the edge emitting EL element 2 on the glass substrate 10.
【０００５】そして、この端面発光型ＥＬ素子ヘッド１
では、図２に例示するように、凹溝１１を底面に形成し
た上部カバー１２と平板状の下部カバー１３とが前記ガ
ラス基板１０の上面と下面とに取付けられている。これ
らのカバー１２，１３の前面に平板状の透明な前部カバ
ー１４が取付けられている。ここで、前記上部・下部カ
バー１２，１３はガラス基板１０の前縁部から前方に突
出しており、互いに対向する側部にスペーサ１５が取付
けられている。そこで、これらのカバー１２〜１４及び
スペーサ１５により形成したカバー部材１６の内部空間
に防湿剤であるオイル１７を封入している。ここで、こ
の端面発光型ＥＬ素子ヘッド１では、カバー部材１６の
上部カバー１２の一端に前記オイル１７の注入口１８を
形成して他端に排気口１９を形成しており、この排気口
１９と前記注入口１８とは封止板２０を接着して密閉し
ている。[0005] The edge emitting EL element head 1
2, an upper cover 12 having a concave groove 11 on the bottom surface and a flat lower cover 13 are attached to the upper and lower surfaces of the glass substrate 10, respectively. A flat transparent front cover 14 is attached to the front surfaces of the covers 12 and 13. Here, the upper and lower covers 12 and 13 protrude forward from the front edge of the glass substrate 10, and spacers 15 are attached to opposing sides. Therefore, an oil 17 as a moisture proof agent is sealed in the internal space of the cover member 16 formed by the covers 12 to 14 and the spacer 15. Here, in the end surface emission type EL element head 1, an inlet 18 for the oil 17 is formed at one end of the upper cover 12 of the cover member 16 and an exhaust port 19 is formed at the other end. The sealing plate 20 is adhered to the injection port 18 for sealing.
【０００６】このような構成において、この端面発光型
ＥＬ素子ヘッド１では、カバー部材１６の注入口１８に
オイル１７を流入させると共に排気口１９から空気を真
空引きし、カバー部材１６の内部空間にオイル１７が充
填されると封止板２０を注入口１８と排気口１９とに接
着してオイル１７の封入を完了する。このようにするこ
とで、この端面発光型ＥＬ素子ヘッド１では、カバー部
材１６内のオイル１７によって端面発光型ＥＬ素子２を
雰囲気から遮断するので、この端面発光型ＥＬ素子２の
劣化や破壊を防止できる。In such a configuration, in the end face light emitting type EL element head 1, the oil 17 flows into the inlet 18 of the cover member 16 and the air is evacuated from the outlet 19, so that the interior space of the cover member 16 When the oil 17 is filled, the sealing plate 20 is bonded to the inlet 18 and the outlet 19 to complete the filling of the oil 17. By doing so, in the edge-emitting EL element head 1, the edge-emitting EL element 2 is shielded from the atmosphere by the oil 17 in the cover member 16, so that the edge-emitting EL element 2 is not deteriorated or destroyed. Can be prevented.
【０００７】さらに、ここでは実開平2-126847号公報に
開示された端面発光型ＥＬ素子ヘッドを第二の従来例と
して図４に基づいて説明する。まず、この端面発光型Ｅ
Ｌ素子ヘッド２１は、絶縁基板２２の表面前縁部に多数
の端面発光型ＥＬ素子２３を連設しており、これらの端
面発光型ＥＬ素子２３上に接着剤２４で保護基板２５を
装着している。そして、この端面発光型ＥＬ素子ヘッド
２１では、前記絶縁基板２２と前記端面発光型ＥＬ素子
２３と前記接着剤２４と前記保護基板２５との前面が平
面を形成しており、この平面上にシリンドリカルレンズ
２６が設けられている。ここで、このシリンドリカルレ
ンズ２６は、熱硬化性のアクリル樹脂を精密金型で成形
することなどで前記端面発光型ＥＬ素子２３の発光端面
上に直接的に形成しており、この端面発光型ＥＬ素子２
３の光軸と前記シリンドリカルレンズ２６の光学中心と
は同軸上に位置している。Further, here, an edge emitting type EL element head disclosed in Japanese Utility Model Laid-Open No. 2-26847 will be described as a second conventional example with reference to FIG. First, the edge emitting type E
The L element head 21 has a large number of edge emitting EL elements 23 connected to the front edge of the surface of an insulating substrate 22. A protective substrate 25 is mounted on these edge emitting EL elements 23 with an adhesive 24. ing. In the edge-emitting EL element head 21, the front surface of the insulating substrate 22, the edge-emitting EL element 23, the adhesive 24, and the protection substrate 25 forms a flat surface, and the cylindrical surface is formed on the flat surface. A lens 26 is provided. Here, the cylindrical lens 26 is formed directly on the light-emitting end face of the edge-emitting EL element 23 by molding a thermosetting acrylic resin with a precision mold or the like. Element 2
The optical axis 3 and the optical center of the cylindrical lens 26 are located coaxially.
【０００８】このような構成において、この端面発光型
ＥＬ素子ヘッド２１では、絶縁基板２２と接着剤２４と
シリンドリカルレンズ２６等が端面発光型ＥＬ素子２３
を外気から遮断するようになっているので、スパークの
発生による破壊や外気の接触による劣化等を防止でき
る。さらに、この端面発光型ＥＬ素子ヘッド２１では、
上述のように端面発光型ＥＬ素子２３の発光端面を封止
する透光部材をシリンドリカルレンズ２６とすること
で、薄膜の積層方向に散乱しがちな端面発光型ＥＬ素子
２３の出射光を集光するようになっている。なお、この
ような端面発光型ＥＬ素子ヘッド２１を利用してプリン
タ装置（図示せず）を実施する場合は、実際にはシリン
ドリカルレンズ２６で副走査方向に集光された端面発光
型ＥＬ素子２３の出射光を、さらにセルフォックレンズ
アレイ（図示せず）等で主走査方向と副走査方向とに収
束する必要がある。In such a configuration, in the edge-emitting EL element head 21, the insulating substrate 22, the adhesive 24, the cylindrical lens 26 and the like are connected to the edge-emitting EL element 23.
Is shielded from outside air, so that destruction due to generation of sparks, deterioration due to contact with outside air, and the like can be prevented. Further, in this edge emitting EL element head 21,
As described above, the light transmitting member that seals the light emitting end surface of the edge emitting EL element 23 is formed of the cylindrical lens 26, so that the light emitted from the edge emitting EL element 23 that tends to be scattered in the laminating direction of the thin film is collected. It is supposed to. When a printer device (not shown) is implemented using such an edge emitting EL element head 21, the edge emitting EL element 23 condensed by the cylindrical lens 26 in the sub-scanning direction is actually used. It is necessary to further converge the emitted light in the main scanning direction and the sub-scanning direction by a selfoc lens array (not shown) or the like.
【０００９】[0009]
【発明が解決しようとする課題】本出願人が実開平4-64
140 号公報として出願した端面発光型ＥＬ素子ヘッド１
では、カバー部材１６内に充填したオイル１７による密
閉で端面発光型ＥＬ素子２の劣化を防止することがで
き、実開平2-126847号公報に開示された端面発光型ＥＬ
素子ヘッド２１では、シリンドリカルレンズ２６で端面
発光型ＥＬ素子２３の劣化を防止すると共に光学特性を
向上させるようになっている。[Problems to be Solved by the Invention]
Edge emitting EL element head 1 filed as Japanese Patent Publication No. 140
Thus, the end face light emitting type EL element 2 can be prevented from being deteriorated by sealing with the oil 17 filled in the cover member 16, and the end face light emitting type EL element disclosed in Japanese Utility Model Laid-Open No. 2-26847 is disclosed.
In the element head 21, the cylindrical lens 26 prevents the edge-emitting EL element 23 from deteriorating and improves the optical characteristics.
【００１０】しかし、端面発光型ＥＬ素子２の発光端面
を包囲するように形成したカバー部材１６にオイル１７
を封入する端面発光型ＥＬ素子ヘッド１では、その構造
が複雑で部品数も多いために生産性が低下している。ま
た、この端面発光型ＥＬ素子ヘッド１では、特性的に端
面発光型ＥＬ素子２の出射光が薄膜の積層方向に散乱し
がちであるため、その光強度が低下して消費電力も増加
している。 However, the cover member 16 formed so as to surround the light emitting end face of the edge emitting type EL element 2 has an oil 17.
In the edge-emitting EL element head 1 enclosing the structure, the productivity is reduced because the structure is complicated and the number of parts is large. Ma
In addition, in this edge-emitting type EL element head 1, the
Light emitted from the surface-emitting type EL element 2 is scattered in the laminating direction of the thin film.
Tend to reduce the light intensity and increase power consumption
doing.
【００１１】また、端面発光型ＥＬ素子２３の発光端面
上にシリンドリカルレンズ２６を直接的に成形する端面
発光型ＥＬ素子ヘッド２１は、端面発光型ＥＬ素子２３
の出射光の散乱を防止することができ、その構造が簡易
で部品数も少ないが、実際には製造が極めて困難で実用
的でない。つまり、上記公報には熱硬化性樹脂からなる
シリンドリカルレンズ２６を端面発光型ＥＬ素子２３の
発光端面上に精密金型で成形することが開示されている
が、これでは精密金型を極めて微細な端面発光型ＥＬ素
子２３上に光学中心が一致するように正確に位置決めし
て密着させる必要があり、その作業が極めて煩雑で生産
性が阻害されることになる。Further, the edge emitting EL element head 21 for directly forming the cylindrical lens 26 on the light emitting edge of the edge emitting EL element 23 is provided with the edge emitting EL element 23.
Can be prevented from being scattered, and the structure is simple and the number of parts is small. However, in actuality, the production is extremely difficult and not practical. That is, the above-mentioned publication discloses that a cylindrical lens 26 made of a thermosetting resin is formed on the light emitting end face of the edge emitting type EL element 23 with a precision mold. It is necessary to accurately position and closely contact the edge emission type EL element 23 so that the optical centers thereof coincide with each other, and this operation is extremely complicated and productivity is impaired.
【００１２】本発明は、光学特性と生産性とが共に良好
な端面発光型ＥＬ素子ヘッドを得るものである。An object of the present invention is to provide an edge-emitting EL element head having good optical characteristics and good productivity.
【００１３】[0013]
【課題を解決するための手段】活性層を包囲する誘電体
層の外面上に相対向する電極層が位置する多数の端面発
光型ＥＬ素子を基板上に連設し、この基板上に位置する
前記端面発光型ＥＬ素子の発光端面に透明なカバー部材
を透明な光硬化型接着剤で接着し、この接着剤の屈折率
が前記カバー部材の屈折率より大きい。 SUMMARY OF THE INVENTION A large number of edge emitting EL elements having opposing electrode layers located on the outer surface of a dielectric layer surrounding an active layer are provided on a substrate, and are located on the substrate. A transparent cover member on the light-emitting end face of the edge-emitting EL element
Is bonded with a transparent light-curing adhesive, and the refractive index of this adhesive is
Is larger than the refractive index of the cover member.
【００１４】[0014]
【作用】カバー部材や光硬化型接着剤で端面発光型ＥＬ
素子を密閉して劣化や破壊を防止することができ、その
構造が極めて簡易なので生産性の向上に寄与することが
でき、さらに、端面発光型ＥＬ素子の出射光が接着剤と
カバー部材とを順次透過する際に集光されるので、その
散乱を防止して発光強度の向上に寄与することができ、
光学特性と生産性とが共に良好な端面発光型ＥＬ素子ヘ
ッドを得ることができる。[Effect] An edge-emitting EL using a cover member or a photo-curing adhesive
To seal the device it is possible to prevent deterioration or destruction, and that since the structure is extremely simple it is possible to contribute to improvement of productivity, further, the light emitted edge emission type EL device adhesives
Since it is focused when it sequentially passes through the cover member,
It can contribute to the improvement of luminescence intensity by preventing scattering,
An edge emitting EL element head having both good optical characteristics and good productivity can be obtained.
【００１５】[0015]
【実施例】本発明の実施例を図１に基づいて説明する。
まず、この端面発光型ＥＬ素子ヘッド２７の端面発光型
ＥＬ素子２８は、マンガンなどの活性元素を含む硫化亜
鉛等からなる薄膜状の活性層２９を上下から囲む誘電体
層３０，３１の上下面に電極層３２，３３を形成した構
造となっており、これらの電極層３２，３３に導通する
コモン電極３４とブロック電極３５とを所定パターンで
形成して端面発光型ＥＬ素子２８をガラス基板３６の上
に連設することで端面発光型ＥＬ素子ヘッド２７を形成
している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG.
First, the edge emitting type EL element 28 of the edge emitting type EL element head 27 has upper and lower surfaces of dielectric layers 30 and 31 which surround a thin active layer 29 made of zinc sulfide or the like containing an active element such as manganese from above and below. A common electrode 34 and a block electrode 35 that are electrically connected to these electrode layers 32 and 33 are formed in a predetermined pattern to form an edge-emitting EL element 28 on a glass substrate 36. The end surface emitting type EL element head 27 is formed by being connected to the above.
【００１６】そして、この端面発光型ＥＬ素子ヘッド２
７では、前記端面発光型ＥＬ素子２８の上面と前面とに
透明な平板状のカバー部材３７，３８を透明な光硬化型
接着剤３９で接着しており、この接着剤３９の屈折率が
前記カバー部材３７，３８の屈折率より大きくなってい
る。Then, the edge emitting EL element head 2
7, the upper surface and the front surface of the edge emitting EL element 28
The transparent plate-shaped cover members 37 and 38 are made of a transparent light-curing type.
The adhesive 39 is used for bonding, and the refractive index of the adhesive 39 is
It is larger than the refractive index of the cover members 37 and 38 .
【００１７】このような構成において、この端面発光型
ＥＬ素子ヘッド２７では、各カバー３７，３８と接着剤
３９とによって端面発光型ＥＬ素子２８が雰囲気から遮
断されるので、この端面発光型ＥＬ素子２８の劣化や破
壊を防止できる。そして、この端面発光型ＥＬ素子ヘッ
ド２７では、端面発光型ＥＬ素子２８の発光端面上に接
着剤３９で前部カバー３８を接着しているので、その平
滑性が極めて良好で光学特性が向上している。また、上
述のような接着剤３９は、その硬化時に外気に接触して
いる部分が白濁しやすいが、この端面発光型ＥＬ素子ヘ
ッド２７では、平板状の前部カバー３８によって端面発
光型ＥＬ素子２８の光軸上では接着剤３９が外気に接触
しないので、この接着剤３９の白濁が光学特性を阻害す
ることを防止している。しかも、この端面発光型ＥＬ素
子ヘッド２７は、端面発光型ＥＬ素子２８の発光端面に
接着剤３９で前部カバー３８を接着した構造となってい
るので、その構造が極めて簡易で生産性が良好である。In such a configuration, in the edge-emitting EL element head 27, the edge-emitting EL element 28 is shielded from the atmosphere by the covers 37 and 38 and the adhesive 39. 28 can be prevented from being degraded or destroyed. In the edge emitting EL element head 27, since the front cover 38 is bonded to the light emitting end face of the edge emitting EL element 28 with the adhesive 39, the smoothness is extremely good and the optical characteristics are improved. ing. In the adhesive 39 as described above, the portion of the adhesive 39 that is in contact with the outside air at the time of curing tends to become cloudy. However, in the edge emitting EL element head 27, the edge emitting EL element is formed by the flat front cover 38. Since the adhesive 39 does not come into contact with the outside air on the optical axis 28, the opacity of the adhesive 39 prevents the optical characteristics from being hindered. In addition, since the edge emitting EL element head 27 has a structure in which the front cover 38 is bonded to the light emitting end face of the edge emitting EL element 28 with the adhesive 39, the structure is extremely simple and the productivity is good. It is.
【００１８】[0018]
【００１９】ここで、本出願人が実際に試作した端面発
光型ＥＬ素子ヘッド２７の製作方法を以下に詳述する。
まず、良く洗浄した大型のガラス基板３６上にＩＴＯ(I
ndium-Tin Oxide)からなる透明導電層を膜厚1000（Å）
に成膜し、これをエッチングでパターニングすることで
電極層３３とブロック電極３５とを形成した。つぎに、
ＲＦ(Radio-Frequency）スパッタリング法で膜厚500
(Å）のＳｉＯ2 層と膜厚2500（Å）のＴa2Ｏ5 層とを
成膜することで誘電体層３１を形成し、この上にＭｎを
濃度0.4(％）に添加したＺｎＳ層をＥＢ(Electron Bea
m）蒸着法で5000〜10000(Å）程度に成膜して活性層２
９を形成した。さらに、この上に誘電体層３０を誘電体
層３１と同様に成膜してからＡｌ層を成膜し、これをエ
ッチングでパターニングして電極層３２とコモン電極３
４を形成した。そして、上述のようにして積層した薄膜
層をエッチングで所定形状にパターニングすることで、
ガラス基板３６上に多数の端面発光型ＥＬ素子２８を連
設した。Here, a method of manufacturing the edge emitting EL element head 27 actually manufactured by the present applicant as a trial will be described in detail below.
First, ITO (I
Transparent conductive layer consisting of ndium-tin oxide (thickness 1000)
The electrode layer 33 and the block electrode 35 were formed by patterning this by etching. Next,
500 film thickness by RF (Radio-Frequency) sputtering method
A dielectric layer 31 is formed by forming an SiO 2 layer (の) and a Ta 2 O 5 layer having a thickness of 2500 (Å), and a ZnS layer containing Mn at a concentration of 0.4 (%) is formed thereon. EB (Electron Bea
m) The active layer 2 is formed to a thickness of about 5000 to 10,000 (Å) by vapor deposition.
9 was formed. Further, a dielectric layer 30 is formed thereon in the same manner as the dielectric layer 31, and then an Al layer is formed. The Al layer is patterned by etching, and the electrode layer 32 and the common electrode 3 are formed.
4 was formed. Then, by patterning the thin film layer laminated as described above into a predetermined shape by etching,
A large number of edge-emitting EL elements 28 were connected on a glass substrate 36.
【００２０】なお、上述のような誘電体層３０，３１の
材料としては、Ｙ2 Ｏ3 ，Ａl2Ｏ3,Si3Ｎ4 等も利用可
能であり、これは加工プロセスや必要な誘電率等を考慮
して選択することができる。また、上述のような薄膜層
の成膜方法としても、ＲＦスパッタリング法やＥＢ蒸着
法等の他、ＣＶＤ(Chemical Vapor Deposition）法、ホ
ットウォールエピタキシ法、分子線エピタキシ法等が実
施可能である。As the material of the dielectric layers 30 and 31 as described above, Y 2 O 3 , Al 2 O 3 , Si 3 N 4 and the like can be used. Etc. can be selected. In addition, as a method for forming the thin film layer as described above, besides the RF sputtering method, the EB vapor deposition method, and the like, a CVD (Chemical Vapor Deposition) method, a hot wall epitaxy method, a molecular beam epitaxy method, and the like can be performed.
【００２１】そして、上述のようにして薄膜技術でガラ
ス基板３６上に連設した端面発光型ＥＬ素子２８の上面
と前面とに装着する各カバー３７，３８を、ここではガ
ラス基板３６と同一の板厚1.1(mm）のガラス板で形成し
た。そこで、このような各カバー３７，３８をガラス基
板３６の上面と前面とに治具（図示せず）で位置決めし
て加圧固定し、これらの間隙に光硬化性で低粘度で高屈
折率のアクリル系接着剤３９を浸透させた。つぎに、こ
の端面発光型ＥＬ素子ヘッド２７を減圧容器（図示せ
ず）内に載置して接着剤３９の脱泡を行ない、この後に
波長420(nm）のハロゲンランプで可視光線を照射するこ
とで接着剤３９を硬化させた。The covers 37 and 38 mounted on the top and front surfaces of the edge emitting EL element 28 provided on the glass substrate 36 by the thin film technique as described above are the same as the glass substrate 36 here. It was formed of a glass plate having a thickness of 1.1 (mm). Therefore, such covers 37 and 38 are positioned on the upper and front surfaces of the glass substrate 36 by means of a jig (not shown) and fixed by pressing, and a light-curing, low-viscosity, high-refractive-index Of the acrylic adhesive 39 was permeated. Next, the edge emission type EL element head 27 is placed in a reduced-pressure container (not shown) to remove bubbles from the adhesive 39, and thereafter, visible light is irradiated with a halogen lamp having a wavelength of 420 (nm). Thus, the adhesive 39 was cured.
【００２２】なお、上述のような減圧によって接着剤３
９は端面発光型ＥＬ素子２８の発光端面上から上部カバ
ー３７の裏面全域に浸透し、この上部カバー３７の上縁
部と下縁部とから露出した状態で接着剤３９は硬化し
た。そして、このようにして外気に接触した位置では接
着剤３９は白濁するが、これは端面発光型ＥＬ素子２８
の光軸上には位置しないので、その光学特性が阻害され
ることはない。また、本出願人は紫外線硬化性の接着剤
３９を波長360(nm）の紫外線の照射で硬化させることで
も、同様に良好な結果が得られることを確認した。It should be noted that the adhesive 3
Reference numeral 9 denotes an upper cover from above the light emitting end face of the edge emitting EL element 28.
The adhesive 39 penetrated all over the back surface of the adhesive 37 and was hardened while being exposed from the upper edge and the lower edge of the upper cover 37. The adhesive 39 becomes cloudy at the position where it comes into contact with the outside air in this manner.
Are not located on the optical axis of the optical system, the optical characteristics thereof are not hindered. In addition, the present applicant has confirmed that similarly good results can be obtained by curing the ultraviolet curable adhesive 39 by irradiation with ultraviolet light having a wavelength of 360 (nm).
【００２３】[0023]
【発明の効果】本発明は上述のように、端面発光型ＥＬ
素子の発光端面に透明なカバー部材を透明な光硬化型接
着剤で接着し、この接着剤の屈折率がカバー部材の屈折
率より大きいことにより、端面発光型ＥＬ素子の出射光
の散乱を防止して発光強度の向上に寄与することがで
き、光学特性と生産性とが共に良好な端面発光型ＥＬ素
子ヘッドを得ることができる等の効果を有するものであ
る。According to the present invention, as described above, the edge emitting type EL is used.
A transparent cover member is attached to the light-emitting end face of the
Adhesive is applied and the refractive index of this adhesive is
Greater than the light emission rate of the edge emitting EL element.
Can contribute to the improvement of the emission intensity by preventing
In this case, an edge emitting EL element head having good optical characteristics and productivity can be obtained.
【図１】本発明の実施例の端面発光型ＥＬ素子ヘッドを
示す斜視図である。FIG. 1 is a perspective view showing an edge-emitting EL element head according to an embodiment of the present invention.
【図２】第一の従来例を示す分解斜視図である。FIG. 2 is an exploded perspective view showing a first conventional example.
【図３】縦断正面図である。FIG. 3 is a vertical sectional front view.
【図４】第二の従来例を示す斜視図である。FIG. 4 is a perspective view showing a second conventional example.
２７ 端面発光型ＥＬ素子ヘッド ２８ 端面発光型ＥＬ素子 ２９ 活性層 ３０，３１ 誘電体層 ３２，３３ 電極層 ３６ 基板３７ 上部カバー ３８ 前部カバー ３９ 接着剤27 Edge-emitting EL element head 28 Edge-emitting EL element 29 Active layer 30, 31 Dielectric layer 32, 33 Electrode layer 36 Substrate 37 Upper cover 38 Front cover 39 Adhesive
フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ // Ｈ０４Ｎ 1/036 (56)参考文献 特開 平３−21466（ＪＰ，Ａ) 特開 昭62−10897（ＪＰ，Ａ) 特開 平３−48895（ＪＰ，Ａ) 特開 平５−159876（ＪＰ，Ａ) 特開 平１−304689（ＪＰ，Ａ) 特開 平５−297315（ＪＰ，Ａ) 実開 昭63−35085（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) H05B 33/00 - 33/28 B41J 3/21 Continuation of the front page (51) Int.Cl. 6 Identification symbol FI // H04N 1/036 (56) References JP-A-3-21466 (JP, A) JP-A-62-10897 (JP, A) JP JP-A-3-48895 (JP, A) JP-A-5-159876 (JP, A) JP-A-1-304689 (JP, A) JP-A-5-297315 (JP, A) Japanese Utility Model Application Sho-63-35085 (JP) , U) (58) Fields investigated (Int. Cl. 6 , DB name) H05B 33/00-33/28 B41J 3/21
Claims (1)
対向する電極層が位置する多数の端面発光型ＥＬ素子を
基板上に連設し、この基板上に位置する前記端面発光型
ＥＬ素子の発光端面に透明なカバー部材を透明な光硬化
型接着剤で接着し、この接着剤の屈折率が前記カバー部
材の屈折率より大きいことを特徴とする端面発光型ＥＬ
素子ヘッド。1. A plurality of edge emitting EL elements having opposing electrode layers located on an outer surface of a dielectric layer surrounding an active layer are connected on a substrate, and the edge emitting type EL elements located on the substrate are provided. Transparent light-curing of a transparent cover member on the light emitting end face of the EL element
Adhesive with a mold adhesive, and the refractive index of the adhesive is
Edge-emitting EL characterized by having a refractive index higher than that of the material
Element head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26135492A JP2908645B2 (en) | 1992-09-30 | 1992-09-30 | Edge-emitting EL element head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26135492A JP2908645B2 (en) | 1992-09-30 | 1992-09-30 | Edge-emitting EL element head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06106778A JPH06106778A (en) | 1994-04-19 |
| JP2908645B2 true JP2908645B2 (en) | 1999-06-21 |
Family
ID=17360686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26135492A Expired - Lifetime JP2908645B2 (en) | 1992-09-30 | 1992-09-30 | Edge-emitting EL element head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2908645B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5869929A (en) * | 1997-02-04 | 1999-02-09 | Idemitsu Kosan Co., Ltd. | Multicolor luminescent device |
-
1992
- 1992-09-30 JP JP26135492A patent/JP2908645B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06106778A (en) | 1994-04-19 |
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