JP4757769B2 - Manufacturing method of display device - Google Patents

Manufacturing method of display device Download PDF

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JP4757769B2
JP4757769B2 JP2006284456A JP2006284456A JP4757769B2 JP 4757769 B2 JP4757769 B2 JP 4757769B2 JP 2006284456 A JP2006284456 A JP 2006284456A JP 2006284456 A JP2006284456 A JP 2006284456A JP 4757769 B2 JP4757769 B2 JP 4757769B2
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sealing material
panels
panel
sealing
melted
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JP2008103182A (en
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傳 篠田
博司 梶山
誠司 宮崎
一也 内田
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University of Tokyo NUC
Ulvac Inc
AGC Inc
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Asahi Glass Co Ltd
University of Tokyo NUC
Ulvac Inc
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Description

本発明はパネルの封着技術にかかり、特に、レーザ光で封着材料を溶融させてパネルを封着する技術に関する。   The present invention relates to a panel sealing technique, and more particularly to a technique for sealing a panel by melting a sealing material with a laser beam.

従来より、ＰＤＰ(Plasma Display Panel)やＦＥＤ(Field Emission Display)のような表示装置の製造には、フロントパネルとリアパネルを封着材料で固定する方法が採用されている。   Conventionally, a method of fixing a front panel and a rear panel with a sealing material has been adopted for manufacturing a display device such as a plasma display panel (PDP) or a field emission display (FED).

封止工程を説明すると、図７(ａ)に示すように、リアパネル１１１上に封着材料１１５を置き、その上に、フロントパネル１１２を乗せる。
リアパネル１１１には隔壁１１３が形成されているが、隔壁１１３の高さよりも厚みのある封着材料１１５を用い、フロントパネル１１２は封着材料１１５上に乗るようにする。 The sealing process will be described. As shown in FIG. 7A, a sealing material 115 is placed on the rear panel 111, and the front panel 112 is placed thereon.
A partition wall 113 is formed on the rear panel 111. A sealing material 115 having a thickness larger than the height of the partition wall 113 is used, and the front panel 112 is placed on the sealing material 115.

そして、二枚のパネル１１１、１１２を重ね合わせた状態で、全体を加熱しながら押圧すると、封着材料１１５が溶融し、押しつぶされ、図７(ｂ)に示すように、フロントパネル１１２が隔壁１１３と密着する。
パネル１１１、１１２間の気体は、パネル１１１、１１２に設けられた排気孔から真空排気し、代わりに不活性ガスを導入して排気孔を閉塞させると、表示装置１１０が得られる。 Then, when the whole panel 111 and 112 are stacked and pressed while being heated, the sealing material 115 is melted and crushed, and as shown in FIG. Close contact with 113.
When the gas between the panels 111 and 112 is evacuated from the exhaust holes provided in the panels 111 and 112, and the inert gas is introduced instead to close the exhaust holes, the display device 110 is obtained.

しかし、二枚のパネル１１１、１１２の全体を加熱させると、熱膨張による歪みが生じ、内部回路が破損したり、封着材料１１５が固化するときに、パネルにクラックが入るという不都合があり、また、封着材料１１５を溶融するときに、上側のパネル１１２が傾くという問題があった。
従って、加熱と冷却をゆっくり行なう必要があり、製造時間が長くなり、また、多額の費用を要するという問題があった。
従来の封止技術は下記文献に記載されている。
特開２０００−５１０２８１号公報 特開２００２−０７５１９７号公報 特開２００２−２６５２３７号公報 However, when the entire two panels 111 and 112 are heated, distortion due to thermal expansion occurs, the internal circuit is damaged, and when the sealing material 115 is solidified, there is a disadvantage that the panel cracks. Further, when the sealing material 115 is melted, there is a problem that the upper panel 112 is inclined.
Accordingly, there is a problem that heating and cooling need to be performed slowly, manufacturing time becomes long, and a large amount of money is required.
Conventional sealing techniques are described in the following documents.
JP 2000-510281 A JP 2002-075197 JP 2002-265237 A

パネルのクラックや回路損傷を発生させずに短時間で封着できる技術を提供する。   Provide a technology that can be sealed in a short time without causing panel cracks or circuit damage.

上記課題を解決するため、第一、第二のパネルを封着材料で接着させる表示装置の製造方法であって、前記第一、第二のパネルの間を一定間隔で固定し、前記第一、第二のパネルの間隔よりも厚みの厚い封着材料を前記第一、第二のパネルの少なくとも一方のパネルの縁と接触して配置し、レーザ光の射出方向を、前記封着材料の、前記第一、第二のパネルの間の隙間に向いた面に向け、前記レーザ光を前記封着材料が配置された位置の内側から前記第一のパネルと第二のパネルのいずれかの面を透して斜めに照射し、前記封着材料を、前記第一、第二のパネルの間の隙間に向いた面から加熱して溶融させ、溶融した前記封着材料を前記第一、第二のパネルの両方に接触させ、溶融した前記封着材料を毛管現象によって前記第一、第二のパネル間に引き込ませた後、固化させる表示装置の製造方法である。
また、本発明は、前記第一、第二のパネルの、前記封着材料が配置された位置から所定距離だけ内側までの範囲に前記レーザ光を照射する表示装置の製造方法である。
In order to solve the above-mentioned problem, there is provided a method of manufacturing a display device in which a first and a second panel are bonded with a sealing material, the first and second panels being fixed at regular intervals, The sealing material having a thickness larger than the interval between the second panels is disposed in contact with the edge of at least one of the first and second panels, and the laser beam emission direction is set to The laser beam is directed to the surface facing the gap between the first and second panels, and the laser beam is directed to either the first panel or the second panel from the inside of the position where the sealing material is disposed. Irradiating obliquely through the surface, the sealing material is heated and melted from the surface facing the gap between the first and second panels, and the melted sealing material is the first, It is brought into contact with both the second panel, the first molten the sealing material by capillary action, the second panel After incorporated can pull during a manufacturing method of a display device to solidify.
Further, the present invention, the first, the second panel, a manufacturing method of a display device for irradiating the laser beam in a range from a position where the sealing material is disposed to the inside by a predetermined distance.

本発明は上記のように構成されており、第一又は第二のパネルの一方は、他方に設けられた隔壁の上端に接触しており、従って、パネル間の距離は、隔壁の高さと等しくなっている。その状態の第一、第二のパネルの両方に封着材料が接触され溶融されるから、封着材料が溶融するときに上側のパネルが傾くことがない。   The present invention is configured as described above, and one of the first or second panels is in contact with the upper end of the partition provided on the other, and therefore the distance between the panels is equal to the height of the partition. It has become. Since the sealing material is brought into contact with and melted in both the first and second panels in this state, the upper panel does not tilt when the sealing material melts.

また、封着材料は、第一、第二のパネルの隙間に面する側面が溶融されるから、溶融した封着材料が、パネル間の隙間よりも外側に流れ出さず、毛管現象によって第一、第二のパネル間に吸い込まれる。
吸い込まれる位置は予め加熱されているので、溶融した封着材料の流動性が失われない。加熱されない位置に達すると、流動性が低下し、その位置で静止する。 In addition, since the side surfaces of the sealing material facing the gap between the first and second panels are melted, the molten sealing material does not flow outside the gap between the panels, and the first phenomenon is caused by capillary action. Inhaled between the second panel.
Since the sucked position is preheated, the fluidity of the molten sealing material is not lost. When it reaches a position where it is not heated, the fluidity decreases and it stops at that position.

封着材料の一部と、パネルの一部にレーザ光を照射するので、昇温は部分的であり、パネルの歪みが生じない。
また、斜め方向から照射すると、第一、第二のパネルの両方が加熱され、クラックが生じない。
封着材料が引き込まれる位置が予め加熱されているので、溶融した封着材料の流動性が失われない。 Since a part of the sealing material and a part of the panel are irradiated with laser light, the temperature rise is partial and the panel is not distorted.
Moreover, if it irradiates from the diagonal direction, both the 1st and 2nd panel will be heated and a crack will not arise.
Since the position where the sealing material is drawn is preheated, the fluidity of the molten sealing material is not lost.

図１の符号１は、本発明に用いることができる封着装置を示している。
この封着装置１は封着室３１を有しており、該封着室３１の内部には台３２が配置されている。
台３２上には、プラズマディスプレイ装置のリアパネル、又はフロントパネルの一方のパネルが配置されており、他方のパネルがその上に重ねられている。 Reference numeral 1 in FIG. 1 indicates a sealing device that can be used in the present invention.
The sealing device 1 has a sealing chamber 31, and a table 32 is disposed inside the sealing chamber 31.
One panel of the rear panel or the front panel of the plasma display device is disposed on the table 32, and the other panel is overlaid thereon.

ここで、台３２上に配置された方を第一のパネル１１、その上に重ねられた方を第二のパネル１２とすると、第二のパネル１２は、第一のパネル１１に形成された隔壁１３上に乗せられており、第一、第二のパネル１１、１２は、隔壁１３によって支持されている。従って、第一、第二のパネル１１、１２の間には、図３に示すように、隔壁１３の高さの分だけ隙間が形成されている。   Here, when the first panel 11 is the one arranged on the base 32 and the second panel 12 is the one overlaid thereon, the second panel 12 is formed on the first panel 11. The first and second panels 11 and 12 are placed on the partition wall 13 and supported by the partition wall 13. Therefore, a gap is formed between the first and second panels 11 and 12 by the height of the partition wall 13 as shown in FIG.

第一、第二のパネル１１、１２の重ね合わせた状態の平面図を図２に示す。第一、第二のパネル１１、１２は、一方が他方からはみ出ており、第一のパネル１１の第二のパネル１２からはみ出た部分の上には、棒状の封着材料１５が配置されている。封着材料１５は低融点のガラスである。または、封着材料１５は、棒状に配置されたペースト状のガラスフリットであってもよい。
封着材料１５は、第一、第二のパネル１１、１２の間の隙間よりも厚いものが用いられており、封着材料１５の上端部分は第二のパネル１２の縁と接触されている。 FIG. 2 shows a plan view of the first and second panels 11 and 12 in an overlapped state. One of the first and second panels 11 and 12 protrudes from the other, and a rod-shaped sealing material 15 is disposed on the portion of the first panel 11 that protrudes from the second panel 12. Yes. The sealing material 15 is a low melting glass. Alternatively, the sealing material 15 may be a paste-like glass frit arranged in a rod shape.
The sealing material 15 is thicker than the gap between the first and second panels 11 and 12, and the upper end portion of the sealing material 15 is in contact with the edge of the second panel 12. .

封着室３１の外部には、レーザ照射装置２０が配置されている。封着室３１の壁面には、一部に透光性を有する窓１９が設けられており、レーザ照射装置２０が射出するレーザ光は、窓１９を通って封着室３１内部に照射されるように構成されている。ここでは、窓１９は、上側の第二のパネル１２よりも上方に配置されている。   A laser irradiation device 20 is disposed outside the sealing chamber 31. The wall 19 of the sealing chamber 31 is partially provided with a light-transmitting window 19, and the laser beam emitted from the laser irradiation device 20 is irradiated through the window 19 into the sealing chamber 31. It is configured as follows. Here, the window 19 is disposed above the upper second panel 12.

レーザ照射装置２０は、レーザ光の射出方向が、封着材料１５の、第一、第二のパネル１１、１２間の隙間に向いた面に向けられており、図４に示すように、レーザ照射装置２０からレーザ光２１を射出すると、上側の第二のパネル１２を透過し、封着材料１５の隙間に向いた側面と、下側に配置された第一のパネル１１の一部に照射される。   In the laser irradiation device 20, the laser light emission direction is directed to the surface of the sealing material 15 facing the gap between the first and second panels 11 and 12, and as shown in FIG. When the laser beam 21 is emitted from the irradiation device 20, it passes through the second panel 12 on the upper side, and irradiates a side surface facing the gap of the sealing material 15 and a part of the first panel 11 arranged on the lower side. Is done.

封着材料１５は、レーザ光が照射された部分が溶融する。溶融部分は、第一、第二のパネル１１、１２間の隙間に向いており、第一、第二のパネル１１、１２の両方に接触し、毛管現象によって溶融した封着材料１５が第一、第二のパネル１１、１２間に引き込まれる。
このとき、封着材料１５の、第一、第二のパネル１１、１２間の隙間とは反対側に向いた面は、毛管現象によって溶融部分が引き込まれ始めた後で溶融し、第一、第二のパネル１１、１２間に引き込まれるから、溶融部分が隙間の反対側に流出することはない。 The sealing material 15 is melted at the portion irradiated with the laser beam. The melted portion faces the gap between the first and second panels 11 and 12, and the sealing material 15 that is in contact with both the first and second panels 11 and 12 and melted by capillary action is the first. , Drawn between the second panels 11 and 12.
At this time, the surface of the sealing material 15 facing away from the gap between the first and second panels 11 and 12 melts after the melted portion starts to be drawn by capillary action, Since it is drawn between the second panels 11 and 12, the melted portion does not flow out to the opposite side of the gap.

レーザ光２１の照射径は封着材料１５の長さよりも小さいから、封着材料１５を溶融させながら、レーザ光２１の照射位置を、封着材料１５の一端から他端まで移動させ、封着材料１５全部を溶融させ、第一、第二のパネル１１、１２間に引き込ませる。   Since the irradiation diameter of the laser beam 21 is smaller than the length of the sealing material 15, the irradiation position of the laser beam 21 is moved from one end to the other end of the sealing material 15 while melting the sealing material 15, and sealing is performed. All the material 15 is melted and drawn between the first and second panels 11, 12.

封着材料１５にレーザ光２１を照射する際、レーザ光２１は、第一、第二のパネル１１、１２のうち、上方に位置する方の第二のパネル１２の縁部分にも照射され、その部分も加熱される。
また、下側に配置された第一のパネル１１の封着材料１５に近い部分にも、レーザ光２１が照射され、封着材料１５が配置された位置から所定範囲だけ加熱される。 When irradiating the sealing material 15 with the laser beam 21, the laser beam 21 is also irradiated to the edge portion of the second panel 12 located on the upper side of the first and second panels 11 and 12, That part is also heated.
Further, the laser light 21 is also irradiated to the portion of the first panel 11 disposed on the lower side close to the sealing material 15, and is heated by a predetermined range from the position where the sealing material 15 is disposed.

図４の、符号Ｈで示された部分は、レーザ光２１が照射されることにより、第一のパネル１１が加熱された部分である。
第一、第二のパネル１１、１２間に引き込まれた封着材料１５が直ぐに冷却された場合には、溶融した封着材料１５の流動性が急速に失われるので、引き込みが不十分になり、第一、第二のパネル１１、１２間の封止が不完全になってしまう。 The portion indicated by the symbol H in FIG. 4 is a portion where the first panel 11 is heated by being irradiated with the laser beam 21.
When the sealing material 15 drawn between the first and second panels 11 and 12 is cooled immediately, the fluidity of the molten sealing material 15 is rapidly lost, so that the drawing becomes insufficient. The sealing between the first and second panels 11 and 12 becomes incomplete.

本発明では、封着材料１５が引き込まれる部分の第一、第二のパネル１１、１２は加熱されており、溶融した封着材料１５が引き込まれたときに冷却されないので流動性が維持され、十分な引き込みが得られる。   In the present invention, the first and second panels 11 and 12 of the portion into which the sealing material 15 is drawn are heated and are not cooled when the molten sealing material 15 is drawn in, so that the fluidity is maintained. Sufficient entrainment is obtained.

図４の符号Ｃで示された部分は、レーザ光２１が照射されず、加熱されない部分であり、溶融した封着材料１５が、加熱されない部分Ｃまで引き込まれると、そこで冷却され、固化し易くなる。
以上により、図５に示すように、第一、第二のパネル１１、１２間は、固化した封着材料１６によって互いに隙間無く固定される。 4 is a portion which is not irradiated with the laser beam 21 and is not heated. When the molten sealing material 15 is drawn to the portion C which is not heated, it is cooled and solidified easily. Become.
As described above, as shown in FIG. 5, the first and second panels 11 and 12 are fixed to each other by the solidified sealing material 16 without a gap.

第一、第二のパネル１１、１２は、四辺を封着する必要があり、先ず、互いに平行な二組の二辺のうちの一組の封着が終了すると、他方の組の封着を行なう。
ここで、第一のパネル１１が第二のパネル１２からはみ出た辺の封着が終了したら、上下反転させ、第二のパネル１２を下方、第一のパネル１１を上方にして、第一のパネル１１からはみ出た第二のパネル１２上に封着材料を配置し、上記と同じ手順により、レーザ光２１を照射し、溶融させ、毛管現象によって溶融した封着材料を第一、第二のパネル１１、１２間に引き込み、封着する。 The first and second panels 11 and 12 need to be sealed on four sides. First, when one set of two sets of two sides parallel to each other is finished, the other set is sealed. Do.
Here, when sealing of the side where the first panel 11 protrudes from the second panel 12 is finished, the first panel 11 is turned upside down, the second panel 12 is set downward, the first panel 11 is set upward, The sealing material is arranged on the second panel 12 protruding from the panel 11, and the laser beam 21 is irradiated and melted by the same procedure as described above, and the sealing material melted by capillary action is first and second. Pull in between panels 11 and 12 and seal.

四辺が封着材料によって接続された状態では、第一、第二のパネル１１、１２間の空間は、外部から分離されているが、封着された状態の第一、第二のパネル１１、１２には、排気孔が設けられており、第一、第二のパネル１１、１２の内部は、排気孔によって外部雰囲気と接続されている。   In the state where the four sides are connected by the sealing material, the space between the first and second panels 11, 12 is separated from the outside, but the first, second panels 11, 12 is provided with exhaust holes, and the insides of the first and second panels 11 and 12 are connected to the external atmosphere by the exhaust holes.

封着室３１には、真空排気系３３とガス導入系３４が接続されており、真空排気系３３を動作させ、封着室３１内の気体を真空排気すると、第一、第二のパネル１１、１２間の気体も排気孔から排気され、真空になる。
その状態でガス導入系３４から、封着室３１内に放電ガスを導入すると、第一、第二のパネル１１、１２間が放電ガスで充満される。排気孔を閉塞させると、放電ガスは第一、第二のパネル１１、１２間に封入される。 A vacuum exhaust system 33 and a gas introduction system 34 are connected to the sealing chamber 31. When the vacuum exhaust system 33 is operated to evacuate the gas in the sealing chamber 31, the first and second panels 11. , 12 is also exhausted from the exhaust hole and becomes a vacuum.
In this state, when the discharge gas is introduced into the sealing chamber 31 from the gas introduction system 34, the space between the first and second panels 11 and 12 is filled with the discharge gas. When the exhaust hole is closed, the discharge gas is sealed between the first and second panels 11 and 12.

以上は、重ね合わせた第一、第二のパネル１１、１２の上方からレーザ光を照射したが、枠体等の上に重ね合わせた第一、第二のパネル１１、１２を配置して下側に位置する第一のパネル１１の底面を露出させ、図６に示すように、下側に位置する第一のパネル１１にレーザ光２２を照射し、透過したレーザ光２２が、封着材料１５の第一、第二のパネル１１、１２間の隙間に面する側面と上側に位置する方の第二のパネル１２の一部に照射されるようにしてもよい。この場合も、第一、第二のパネル１１、１２の、溶融した封着材料１５が引き込まれる部分を加熱しておくとよい。   In the above, the laser beam was irradiated from above the superimposed first and second panels 11 and 12, but the first and second panels 11 and 12 superimposed on the frame or the like are disposed below. The bottom surface of the first panel 11 positioned on the side is exposed, and the first panel 11 positioned on the lower side is irradiated with the laser beam 22 as shown in FIG. You may make it irradiate to a part of 2nd panel 12 of the side located in the side facing the clearance gap between 15 1st, 2nd panels 11 and 12, and the upper side. Also in this case, it is preferable to heat the portions of the first and second panels 11 and 12 into which the melted sealing material 15 is drawn.

上記実施例では、封着後、第一、第二のパネル１１、１２間を真空排気したが、封着室３１を真空雰囲気にして第一、第二のパネル１１、１２を封着し、次いで、封着室３１に放電ガスを導入し、ガス導入孔から第一、第二のパネル１１、１２間に導入してもよい。
また、封着室３１内を真空排気した後、放電ガスを導入し、その状態で第一、第二のパネル１１、１２を封着してもよい。 In the above embodiment, the first and second panels 11 and 12 were evacuated after sealing, but the first and second panels 11 and 12 were sealed with the sealing chamber 31 in a vacuum atmosphere. Next, a discharge gas may be introduced into the sealing chamber 31 and introduced between the first and second panels 11 and 12 through the gas introduction hole.
Alternatively, after the inside of the sealing chamber 31 is evacuated, a discharge gas may be introduced and the first and second panels 11 and 12 may be sealed in that state.

なお、上記実施例では、第一、第二のパネル１１、１２のうち、一方を下側、他方を上側にして配置したが、第一、第二のパネルを、隔壁に密着させた状態で鉛直に配置し、第一又は第二のパネルの一方又は両方の縁に密着して封着材料を配置し、溶融させ、毛管現象によって溶融した封着材料を第一、第二のパネル間に引き込んでもよい。   In the above embodiment, one of the first and second panels 11 and 12 is disposed on the lower side and the other on the upper side. However, the first and second panels are in close contact with the partition wall. Place the sealing material in a vertical position, in close contact with one or both edges of the first or second panel, melt it, and melt the sealing material by capillary action between the first and second panels. You may pull in.

このとき、封着材料を第一又は第二のパネルの縁上に配置し、毛管現象に加え、溶融した封着材料の自重によって、溶融した封着材料を第一、第二のパネル間に引き込んでもよい。   At this time, the sealing material is disposed on the edge of the first or second panel, and in addition to capillary action, the molten sealing material is placed between the first and second panels by its own weight. You may pull in.

本発明の封着工程を説明するための図面Drawing for explaining the sealing process of the present invention 第一、第二のパネルの重ね合わせ状態を説明するための図面Drawing for explaining the overlapping state of the first and second panels 封着材料が配置された部分の拡大図Enlarged view of the part where the sealing material is placed 封着材料にレーザ光を照射する状態を説明するための図面Drawing for explaining a state in which a sealing material is irradiated with laser light 固化した封着材料で封着されたパネルを説明するための図面Drawing for explaining panel sealed with solidified sealing material 逆側からレーザ光を照射する場合を説明するための図面Drawing for explaining the case of irradiating laser light from the opposite side (ａ)、(ｂ)：従来技術の封着方法を説明するための図面(a), (b): Drawings for explaining a conventional sealing method

符号の説明Explanation of symbols

１１……第一のパネル
１２……第二のパネル
１５……封着材料
２１、２２……レーザ光 11 ... First panel 12 ... Second panel 15 ... Sealing materials 21, 22 ... Laser light

Claims (2)

第一、第二のパネルを封着材料で接着させる表示装置の製造方法であって、
前記第一、第二のパネルの間を一定間隔で固定し、
前記第一、第二のパネルの間隔よりも厚みの厚い封着材料を前記第一、第二のパネルの少なくとも一方のパネルの縁と接触して配置し、
レーザ光の射出方向を、前記封着材料の、前記第一、第二のパネルの間の隙間に向いた面に向け、
前記レーザ光を前記封着材料が配置された位置の内側から前記第一のパネルと第二のパネルのいずれかの面を透して斜めに照射し、
前記封着材料を、前記第一、第二のパネルの間の隙間に向いた面から加熱して溶融させ、
溶融した前記封着材料を前記第一、第二のパネルの両方に接触させ、溶融した前記封着材料を毛管現象によって前記第一、第二のパネル間に引き込ませた後、固化させる表示装置の製造方法。 A method for manufacturing a display device in which first and second panels are bonded with a sealing material,
Fixing between the first and second panels at regular intervals;
A sealing material having a thickness greater than the distance between the first and second panels is disposed in contact with an edge of at least one of the first and second panels;
The direction of laser light emission is directed to the surface of the sealing material facing the gap between the first and second panels,
Irradiate the laser beam obliquely through the surface of either the first panel or the second panel from the inside of the position where the sealing material is disposed,
The sealing material is heated and melted from the surface facing the gap between the first and second panels,
It melted the sealing material the first, brought into contact with both the second panel, after incorporated can pull between the first and second panels by capillarity the melted the sealing material, to solidify Manufacturing method of display device. 前記第一、第二のパネルの、前記封着材料が配置された位置から所定距離だけ内側までの範囲に前記レーザ光を照射する請求項１記載の表示装置の製造方法。 Said first, second panel, a method of manufacturing a display device according to claim 1, wherein irradiating the laser beam in the range of only up to the inner predetermined distance from a position where the sealing material is arranged.
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