JP5541508B2 - Light irradiation device - Google Patents

Light irradiation device Download PDF

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JP5541508B2
JP5541508B2 JP2010134672A JP2010134672A JP5541508B2 JP 5541508 B2 JP5541508 B2 JP 5541508B2 JP 2010134672 A JP2010134672 A JP 2010134672A JP 2010134672 A JP2010134672 A JP 2010134672A JP 5541508 B2 JP5541508 B2 JP 5541508B2
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excimer lamp
housing
heat transfer
transfer screen
light irradiation
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JP2012004144A (en
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賢治 山森
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Ushio Denki KK
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Ushio Denki KK
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この発明は光照射装置に関するものであり、特に、紫外線照射処理に使用されるエキシマランプを備えた光照射装置に係わるものである。   The present invention relates to a light irradiation apparatus, and more particularly to a light irradiation apparatus including an excimer lamp used for ultraviolet irradiation processing.

例えば、液晶表示パネルのガラス基板の紫外線照射による洗浄工程等においては、波長200nm以下の真空紫外光を放射するエキシマランプを備えた光照射装置が使用されている。
特開2009−212429号公報(特許文献1)には、例えば、波長172nmの真空紫外光を放射するエキシマランプを備えた光照射装置が開示されている。
図5にその概略構造が示されていて、ハウジング1内にエキシマランプ2が収納されていて、ハウジング1の下方は光取出し用開口3となっている。
そして、前記エキシマランプ2の下方にはワークWが配置されている。ハウジング1内の上方には窒素ブロー管4、4が設けられ、その噴出し口4a、4aから窒素ガスN2が噴出されていて、エキシマランプ2からの真空紫外光が大気中の酸素によって吸収されることを抑制している。
噴出された窒素ガスN2はエキシマランプ2とワークWの間隙に流入し、エキシマランプ2からワークWに照射される真空紫外光が酸素に吸収されることを抑制している。
For example, in a cleaning process or the like of a glass substrate of a liquid crystal display panel by ultraviolet irradiation, a light irradiation apparatus including an excimer lamp that emits vacuum ultraviolet light having a wavelength of 200 nm or less is used.
Japanese Unexamined Patent Publication No. 2009-212429 (Patent Document 1) discloses a light irradiation apparatus including an excimer lamp that emits vacuum ultraviolet light having a wavelength of 172 nm, for example.
FIG. 5 shows a schematic structure thereof. An excimer lamp 2 is accommodated in the housing 1, and a light extraction opening 3 is provided below the housing 1.
A work W is disposed below the excimer lamp 2. Nitrogen blow tubes 4 and 4 are provided in the upper part of the housing 1, nitrogen gas N2 is ejected from the ejection ports 4a and 4a, and vacuum ultraviolet light from the excimer lamp 2 is absorbed by oxygen in the atmosphere. Is suppressed.
The ejected nitrogen gas N2 flows into the gap between the excimer lamp 2 and the workpiece W, and the vacuum ultraviolet light applied to the workpiece W from the excimer lamp 2 is suppressed from being absorbed by oxygen.

ところが、かかる従来技術においては、ハウジング1内に導入された窒素ガスは、エキシマランプ2からの照射熱を受けて加熱されてしまい、この加熱された窒素ガスがワークWに吹き付けられるので、ワークWが加熱され、該ワークWが変形したり、損傷したりしてしまうという不具合があった。   However, in such a conventional technique, the nitrogen gas introduced into the housing 1 is heated by receiving irradiation heat from the excimer lamp 2, and the heated nitrogen gas is blown onto the workpiece W. Is heated, and the work W is deformed or damaged.

特開2009−212429号公報JP 2009-212429 A

この発明が解決しようとする課題は、断面矩形状のエキシマランプを収容し、光取出用し開口が形成されたハウジングと、該ハウジングの内部に不活性ガスを供給するガス供給機構とからなる光照射装置において、ハウジング内に噴出されてエキシマランプによって加熱された不活性ガスが、加熱されたままの状態でワークに吹き付けられることを防止した構造を提供するものである。   The problem to be solved by the present invention is a light comprising a housing containing an excimer lamp having a rectangular cross section and having an opening for extracting light and a gas supply mechanism for supplying an inert gas into the housing. In the irradiation apparatus, a structure is provided in which an inert gas which is ejected into a housing and heated by an excimer lamp is prevented from being sprayed on the workpiece while being heated.

上記課題を解決するために、この発明に係る光照射装置は、エキシマランプを収容するケーシングの光取出し開口に伝熱性スクリーンが設けられ、該伝熱性スクリーンを冷却する冷却機構が設けられていることを特徴とするものである。
また、前記伝熱性スクリーンが、前記エキシマランプの放電容器の光取出し側の外表面に配置された外部電極を兼ねていることを特徴とする。
In order to solve the above-described problems, the light irradiation apparatus according to the present invention is provided with a heat transfer screen in a light extraction opening of a casing that houses an excimer lamp, and a cooling mechanism for cooling the heat transfer screen is provided. It is characterized by.
The heat transfer screen also serves as an external electrode disposed on the outer surface on the light extraction side of the discharge vessel of the excimer lamp.

この発明の光照射装置によれば、ガス供給機構からハウジング内に噴出されて、エキシマランプによって加熱された不活性ガスは、光取出し開口に設けられ、冷却機構によって冷却された伝熱性スクリーンを通過する際に冷却されるので、ワークに対して加熱状態のままで吹きつけられることがなく、ワークに悪影響を及ぼすことがない。
また、前記伝熱性スクリーンがエキシマランプの光取り出し側の外部電極を兼ねているので、部品点数の削減に寄与するものである。
According to the light irradiation apparatus of the present invention, the inert gas that is ejected from the gas supply mechanism into the housing and heated by the excimer lamp passes through the heat transfer screen that is provided in the light extraction opening and cooled by the cooling mechanism. Since it is cooled when it is done, it is not blown in a heated state against the work, and the work is not adversely affected.
Further, since the heat transfer screen also serves as an external electrode on the light extraction side of the excimer lamp, it contributes to a reduction in the number of parts.

本発明の光照射装置の断面図。Sectional drawing of the light irradiation apparatus of this invention. 図1の部分斜視図。FIG. 2 is a partial perspective view of FIG. 1. 本発明の他の実施例の斜視図。The perspective view of the other Example of this invention. 本発明の更に他の実施例の断面図。Sectional drawing of other Example of this invention. 従来技術の断面図。Sectional drawing of a prior art.

図1は、本発明の光照射装置の断面図であり、図2は、その部分斜視図である。
図において、ハウジング1内には長尺の断面矩形状の放電容器2aからなるエキシマランプ2が配置されており、該ハウジング1の下方は開放されていて光取出し開口3を形成している。前記ハウジング1内には、ブロー管4、4とガス噴出し口4a、4aからなるガス供給機構5が設けられている。
前記ハウジング1の光取出し開口3には、網状体からなる伝熱性スクリーン6が設けられ、その両端は冷却ジャケット8を有する冷却機構7に当接支持されている。該冷却ジャケット8内には冷却水が流通し、これにより、前記伝熱性スクリーン6を冷却している。
FIG. 1 is a cross-sectional view of the light irradiation apparatus of the present invention, and FIG. 2 is a partial perspective view thereof.
In the figure, an excimer lamp 2 comprising a discharge vessel 2 a having a long rectangular cross section is disposed in a housing 1, and a lower portion of the housing 1 is opened to form a light extraction opening 3. In the housing 1, a gas supply mechanism 5 including blow pipes 4 and 4 and gas ejection ports 4a and 4a is provided.
The light extraction opening 3 of the housing 1 is provided with a heat conductive screen 6 made of a net-like body, and both ends thereof are in contact with and supported by a cooling mechanism 7 having a cooling jacket 8. Cooling water flows through the cooling jacket 8, thereby cooling the heat transfer screen 6.

前記ハウジング1はアルミニウムやステンレス、あるいはそれらの合金などの金属製であり、伝熱性スクリーン6は耐紫外光性や熱伝導性に優れた材料、例えばステンレスで形成される。
また、その寸法の一例を示すと以下の通り。
ランプと伝熱性スクリーンとの距離2mm
伝熱性スクリーンとワークとの距離2mm
ワークとランプとの距離は、約4〜5mm
伝熱性スクリーンの素線径は1mm、好ましくは0.5mm
伝熱性スクリーンの網目のサイズは、2mm×2mm
The housing 1 is made of a metal such as aluminum, stainless steel, or an alloy thereof, and the heat conductive screen 6 is formed of a material excellent in ultraviolet light resistance and thermal conductivity, for example, stainless steel.
An example of the dimensions is as follows.
2mm distance between lamp and heat transfer screen
2mm distance between heat transfer screen and workpiece
The distance between the workpiece and the lamp is about 4-5mm
The wire diameter of the heat transfer screen is 1 mm, preferably 0.5 mm
The mesh size of the heat transfer screen is 2mm x 2mm

上記構成において、エキシマランプ2の点灯時には、ブロー管4の噴出し口4aから窒素ガスN2がハウジング1内に導入され、一方、冷却機構7のジャケット8には冷却水が流されていて、伝熱性スクリーン6は冷却されている。
窒素ガスN2は、エキシマランプ2とワークWとの間に流入して酸素濃度を低下させ、エキシマランプ2からワークWに照射される真空紫外光が酸素に吸収されることを抑制する。
そして、該窒素ガスN2は、エキシマランプ2とワークWとの間に流入するまでに、エキシマランプ2によって加熱されるが、冷却されている伝熱性スクリーン6の網目を通過するときに冷却されるので、ワークWが窒素ガスN2によって加熱されることが抑制される。
In the above configuration, when the excimer lamp 2 is lit, nitrogen gas N2 is introduced into the housing 1 from the outlet 4a of the blow tube 4, while cooling water is flowing through the jacket 8 of the cooling mechanism 7 so The thermal screen 6 is cooled.
The nitrogen gas N2 flows between the excimer lamp 2 and the workpiece W to reduce the oxygen concentration, and suppresses the vacuum ultraviolet light irradiated from the excimer lamp 2 to the workpiece W from being absorbed by oxygen.
The nitrogen gas N2 is heated by the excimer lamp 2 until it flows between the excimer lamp 2 and the workpiece W, but is cooled when it passes through the mesh of the cooled heat transfer screen 6. Therefore, the workpiece W is suppressed from being heated by the nitrogen gas N2.

また、前記伝熱性スクリーン6は図2では網状体のものを示したが、これに限られず、図3に示すように、素線を一方向に張り渡した形状のものであってもよい。   Further, although the heat conductive screen 6 is a net-like body in FIG. 2, it is not limited to this, and may have a shape in which strands are stretched in one direction as shown in FIG. 3.

図4には別に実施例が示されている。この実施例では、エキシマランプ2の放電容器2aの光取出し側の外表面の外部電極が省略されていて、前記放電容器2aが前記伝熱性スクリーン6に当接されており、該伝熱性スクリーン6が外部電極を兼ねている。
そして、伝熱性スクリーン6は、前述のように、金属又は合金部材で形成され、この伝熱性スクリーン6が電気伝導性を有する冷却機構7及びハウジング1に電気的に接続され、このハウジング1を接地することで、前記伝熱性スクリーン6が低圧側の電極として機能する。
この実施例によれば、部品点数の削減が図られる。
FIG. 4 shows another embodiment. In this embodiment, the external electrode on the outer surface on the light extraction side of the discharge vessel 2 a of the excimer lamp 2 is omitted, and the discharge vessel 2 a is in contact with the heat transfer screen 6. Doubles as an external electrode.
The heat transfer screen 6 is formed of a metal or alloy member as described above, and the heat transfer screen 6 is electrically connected to the cooling mechanism 7 and the housing 1 having electrical conductivity, and the housing 1 is grounded. Thus, the heat conductive screen 6 functions as an electrode on the low pressure side.
According to this embodiment, the number of parts can be reduced.

以上のように、本発明の光照射装置では、ハウジングの光取出し開口に伝熱性スクリーンを設け、該伝熱性スクリーンを冷却機構により冷却する構成としたので、ハウジング内に噴出した不活性ガスがエキシマランプによって加熱されても、伝熱性スクリーンを通過するときに冷却されるので、加熱状態の不活性ガスがそのままワークに吹き付けられることがない。   As described above, in the light irradiation device of the present invention, since the heat transfer screen is provided in the light extraction opening of the housing and the heat transfer screen is cooled by the cooling mechanism, the inert gas jetted into the housing is excimer. Even if heated by the lamp, it is cooled when passing through the heat transfer screen, so that the heated inert gas is not sprayed on the workpiece as it is.

1 ハウジング
2 エキシマランプ
3 光取出し開口
4 窒素ガスブロー管
4a ガス噴出し口
5 ガス供給機構
6 伝熱性スクリーン
7 冷却機構
8 冷却ジャケット
W ワーク


DESCRIPTION OF SYMBOLS 1 Housing 2 Excimer lamp 3 Light extraction opening 4 Nitrogen gas blow pipe 4a Gas ejection port 5 Gas supply mechanism 6 Heat transfer screen 7 Cooling mechanism 8 Cooling jacket W Workpiece


Claims (2)

断面矩形状のエキシマランプと、該エキシマランプを収容し、真空紫外光取出し開口が形成されたハウジングと、該ハウジングの内部に不活性ガスを供給するガス供給機構とからなり、前記ハウジング外のワークに真空紫外光を照射するための光照射装置において、
前記ハウジング真空紫外光取出し開口に不活性ガスを通す伝熱性スクリーンが設けられ、該伝熱性スクリーンを冷却する冷却機構が設けられていることを特徴とする光照射装置。
An excimer lamp having a rectangular cross section, a housing that accommodates the excimer lamp and has a vacuum ultraviolet light extraction opening , and a gas supply mechanism that supplies an inert gas to the inside of the housing. In the light irradiation device for irradiating the vacuum ultraviolet light to
A light irradiation apparatus, wherein a heat transfer screen for passing an inert gas is provided in a vacuum ultraviolet light extraction opening of the housing , and a cooling mechanism for cooling the heat transfer screen is provided.
前記伝熱性スクリーンが、前記エキシマランプの放電容器の光取出し側の外表面に配置された電極を兼ねていることを特徴とする請求項1の光照射装置。   2. The light irradiation apparatus according to claim 1, wherein the heat transfer screen also serves as an electrode disposed on an outer surface of the discharge vessel of the excimer lamp on the light extraction side.
JP2010134672A 2010-06-14 2010-06-14 Light irradiation device Active JP5541508B2 (en)

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US7051743B2 (en) * 2002-10-29 2006-05-30 Yong Bae Kim Apparatus and method for cleaning surfaces of semiconductor wafers using ozone
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JP5019156B2 (en) * 2006-08-21 2012-09-05 ウシオ電機株式会社 Excimer lamp device
JP4994211B2 (en) * 2007-12-20 2012-08-08 大日本スクリーン製造株式会社 Substrate processing equipment
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