JP2007155382A - Temperature sensor for cleaning fluid vessel - Google Patents

Temperature sensor for cleaning fluid vessel Download PDF

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JP2007155382A
JP2007155382A JP2005347675A JP2005347675A JP2007155382A JP 2007155382 A JP2007155382 A JP 2007155382A JP 2005347675 A JP2005347675 A JP 2005347675A JP 2005347675 A JP2005347675 A JP 2005347675A JP 2007155382 A JP2007155382 A JP 2007155382A
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quartz tube
cleaning liquid
tube
temperature
temperature sensor
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Takaaki Uemura
敬明 植村
Hisafumi Sakurai
寿文 桜井
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Kawaso Electric Industrial Co Ltd
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Kawaso Electric Industrial Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a temperature sensor for a cleaning fluid vessel capable of preventing spreading of fine fragments into cleaning fluid even when a quartz tube having a temperature-measuring element arranged inside is broken by any chance, and performing always stable temperature measurement without reducing a response characteristic of the temperature-measuring element. <P>SOLUTION: The temperature sensor 1 is constituted by arranging the temperature-measuring element 3 inside a tip blocking part 2a of the quartz tube 2 to be immersed into the cleaning fluid in the cleaning fluid vessel. The sensor 1 has a constitution wherein close coating of a fluororesin film 9 is performed on the whole surface outside the quartz tube 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、半導体ウエハや液晶用ガラス基板等の薄板状精密基板(以下、単に「基板」という。)の洗浄液を測温するための温度センサに関する。   The present invention relates to a temperature sensor for measuring the temperature of a cleaning liquid of a thin plate precision substrate (hereinafter simply referred to as “substrate”) such as a semiconductor wafer or a glass substrate for liquid crystal.

基板の製造過程では、基板表面に付着するパーティクルやコンタミネーション等の汚染物を除去するために基板洗浄処理が施される。この基板洗浄処理では、除去すべき汚染物の種類に応じて様々な洗浄液が使用されると共に、該洗浄液による洗浄効果を高めるために洗浄液が所定の温度を安定して保持するように温度管理することが必要であり、従来から洗浄液の温度測定が行われている。   In the process of manufacturing the substrate, a substrate cleaning process is performed to remove contaminants such as particles and contamination adhering to the substrate surface. In this substrate cleaning process, various cleaning liquids are used according to the types of contaminants to be removed, and temperature management is performed so that the cleaning liquid stably maintains a predetermined temperature in order to enhance the cleaning effect of the cleaning liquid. Conventionally, the temperature of the cleaning liquid has been measured.

ところが、基板の製造過程で使用される洗浄液には金属に対して強い腐食作用を示すものもあり、測温素子を直接洗浄液中に浸漬して測温することはできない。そこで従来は耐腐食性に優れた石英管を使用し、その石英管の底部に測温素子を配置し、該石英管を洗浄液に浸漬して温度測定を行うようにした温度センサが使用されている。   However, some cleaning liquids used in the manufacturing process of the substrate exhibit a strong corrosive action on metals, and it is impossible to measure the temperature by directly immersing the temperature measuring element in the cleaning liquid. Therefore, a temperature sensor is conventionally used in which a quartz tube having excellent corrosion resistance is used, a temperature measuring element is arranged at the bottom of the quartz tube, and the quartz tube is immersed in a cleaning solution to measure the temperature. Yes.

しかしながら、石英管は割れ易いため、洗浄液に浸漬した状態で割れた場合には細かな破片が洗浄液中に拡散することになり、洗浄液を汚染するという問題がある。   However, since the quartz tube is easy to break, there is a problem that if the quartz tube is cracked while immersed in the cleaning liquid, fine fragments diffuse into the cleaning liquid and contaminate the cleaning liquid.

この問題を解決するために、万一、石英管が割れた場合であっても細かな破片が洗浄液中に拡散しないように、石英管にフッ素樹脂チューブを被覆して熱収縮させた温度センサを使用することもある。この場合、石英管が割れてしまってもフッ素樹脂チューブで覆われているので、破片が拡散することはない。ところが、石英管をフッ素樹脂チューブで被覆すると、石英管とフッ素樹脂チューブの間に空気層が介在するので、洗浄液からの熱伝達が低下し、石英管の内部に設けた測温素子の応答特性が低下するという問題がある。   In order to solve this problem, a temperature sensor with a quartz tube covered with a fluororesin tube and thermally shrunk so that fine fragments will not diffuse into the cleaning liquid should the quartz tube break. Sometimes used. In this case, even if the quartz tube is broken, it is covered with the fluororesin tube, so that the fragments do not diffuse. However, if the quartz tube is covered with a fluororesin tube, an air layer is interposed between the quartz tube and the fluororesin tube, so heat transfer from the cleaning liquid is reduced, and the response characteristics of the temperature measuring element provided inside the quartz tube There is a problem that decreases.

本発明は、上述のような従来の課題を解決することを目的としてなされたものであり、石英管を使用し、万一その石英管が割れた場合であっても細かな破片が洗浄液中に拡散することを防止し、しかも測温素子の応答特性を低下させることなく、常に安定した温度測定が可能になるようにした温度センサを提供するものである。   The present invention has been made for the purpose of solving the above-described conventional problems. A quartz tube is used, and even if the quartz tube is broken, fine fragments are present in the cleaning liquid. It is an object of the present invention to provide a temperature sensor capable of preventing temperature diffusion and always enabling stable temperature measurement without deteriorating the response characteristic of the temperature measuring element.

上記目的を達成するため、本発明が解決手段として採用したところは、洗浄液槽の洗浄液に浸漬される石英管の先端閉塞部の内部に測温素子を配置した温度センサにおいて、前記石英管の外側表面の全面にフッ素樹脂膜を密着コーティングした点にある。かかる構成により、石英管とフッ素樹脂膜の間には空気層を介在することがなく、石英管をフッ素樹脂膜で被覆した温度センサを得ることができる。   In order to achieve the above object, the present invention adopts as a solution means a temperature sensor in which a temperature measuring element is arranged inside a tip closing portion of a quartz tube immersed in a cleaning solution in a cleaning solution tank, and the outside of the quartz tube. The point is that a fluororesin film is coated on the entire surface. With such a configuration, an air layer is not interposed between the quartz tube and the fluororesin film, and a temperature sensor in which the quartz tube is covered with the fluororesin film can be obtained.

また上記構成とは別に、本発明が解決手段として採用したところは、洗浄液槽の洗浄液に浸漬される石英管の先端閉塞部の内部に測温素子を配置した温度センサにおいて、前記石英管の上端に該石英管を支持する支持管を取付け、該支持管を挿通して配線されたリード線を前記測温素子に接続しており、前記石英管の外側表面の全面から前記支持管の外側表面にわたり連続して一体的にフッ素樹脂膜を密着コーティングした点にある。これにより、石英管とフッ素樹脂膜の間には空気層を介在することがなく、石英管をフッ素樹脂膜で被覆した温度センサを得ることができると共に、石英管を支持する支持管の表面に対しても連続的にフッ素樹脂膜が一体形成された温度センサとなる。   In addition to the above configuration, the present invention adopts as a solving means, in a temperature sensor in which a temperature measuring element is arranged inside a tip closing portion of a quartz tube immersed in a cleaning liquid in a cleaning liquid tank, an upper end of the quartz tube is arranged. A support tube for supporting the quartz tube is attached to the lead wire wired through the support tube and connected to the temperature measuring element, and from the entire outer surface of the quartz tube to the outer surface of the support tube It is that the fluororesin film is continuously and integrally coated over the entire area. As a result, a temperature sensor in which the quartz tube is covered with the fluororesin film can be obtained without interposing an air layer between the quartz tube and the fluororesin film, and the surface of the support tube that supports the quartz tube can be obtained. In contrast, a temperature sensor in which a fluororesin film is continuously formed integrally is obtained.

本発明によれば、石英管の先端閉塞部に測温素子を配置し、その石英管を洗浄液に浸漬して温度を測定するように構成しつつも、石英管の表面にはフッ素樹脂膜を密着コーティングしているので、石英管とフッ素樹脂膜の間には空気層を介在することがない。そのため、測温素子の応答特性が低下することなく、常に安定した温度測定が可能になる。そして石英管はフッ素樹脂膜により強化されているので割れ難く、万一、石英管が割れた場合であっても破片の拡散はフッ素樹脂膜で防止されるので、洗浄液を汚染することがない。   According to the present invention, the temperature measuring element is disposed at the tip closing portion of the quartz tube, and the quartz tube is immersed in the cleaning liquid so as to measure the temperature. Because of the close coating, there is no air layer between the quartz tube and the fluororesin film. Therefore, stable temperature measurement can always be performed without deteriorating the response characteristic of the temperature measuring element. Since the quartz tube is reinforced by the fluororesin film, it is difficult to break, and even if the quartz tube is broken, the diffusion of fragments is prevented by the fluororesin film, so that the cleaning liquid is not contaminated.

また、石英管の上端に該石英管を支持する金属製等の支持管を取り付けると共に、石英管と支持管の表面に対して一体的にフッ素樹脂膜を密着コーティングした構成とすることにより、支持管が石英管と継ぎ目なく一体的にフッ素樹脂膜によってコーティングされるので、支持管が洗浄液によって腐食されることを良好に防止できるようになり、温度センサの表面全体が耐腐食性を備えた構成となる。   In addition, a support tube made of metal or the like that supports the quartz tube is attached to the upper end of the quartz tube, and the fluororesin film is integrally coated on the surface of the quartz tube and the support tube, thereby supporting the quartz tube. Since the tube is seamlessly coated with the fluororesin film integrally with the quartz tube, the support tube can be well prevented from being corroded by the cleaning liquid, and the entire surface of the temperature sensor has corrosion resistance. It becomes.

以下図面に基づいて本発明の好ましい実施形態を詳述する。図1は本発明の一実施形態である洗浄液槽用温度センサ1の構成を示す断面図である。洗浄液槽用温度センサ1は、透明石英ガラスにより先端を断面U字状に閉塞した閉塞部2aを有する直径数ミリ程度の石英管2を備え、前記閉塞部2aの内側に測温抵抗体等の測温素子3を配置した構成であり、測温素子3に接続されるリード線4は石英管2の内部を通って上端開口2bから石英管2の外部に引き出される。尚、測温素子3は石英管2の内壁に対してほぼ隙間のない状態で配置されることが好ましい。   Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing a configuration of a temperature sensor 1 for a cleaning liquid tank according to an embodiment of the present invention. The temperature sensor 1 for a cleaning liquid tank includes a quartz tube 2 having a diameter of about several millimeters having a closed portion 2a whose front end is closed in a U-shaped cross section with transparent quartz glass, and a temperature measuring resistor or the like is provided inside the closed portion 2a. The temperature measuring element 3 is arranged, and the lead wire 4 connected to the temperature measuring element 3 passes through the inside of the quartz tube 2 and is drawn out of the quartz tube 2 from the upper end opening 2b. Note that the temperature measuring element 3 is preferably arranged with substantially no gap with respect to the inner wall of the quartz tube 2.

石英管2の上部外面にはアルミナを主成分に含む耐熱接着剤5を介してステンレス等で構成される金属製の支持管6が設けられる。この支持管6は中間位置でL字状に折れ曲がった屈曲管として形成され、一端6aに石英管2を支持すると共に、他端6bに固定手段7が設けられ、図例では固定手段7がナットで構成される。支持管6の端部開口6cにはテフロン(登録商標)等で被覆されたケーブル8が固定手段7を介して接続固定され、該ケーブル8から延設されたリード線4が支持管6及び石英管2の内部に配線され、測温素子3に接続される。   A metallic support tube 6 made of stainless steel or the like is provided on the upper outer surface of the quartz tube 2 with a heat-resistant adhesive 5 containing alumina as a main component. The support tube 6 is formed as a bent tube bent in an L shape at an intermediate position, supports the quartz tube 2 at one end 6a, and is provided with a fixing means 7 at the other end 6b. In the illustrated example, the fixing means 7 is a nut. Consists of. A cable 8 covered with Teflon (registered trademark) or the like is connected and fixed to the end opening 6c of the support tube 6 via a fixing means 7, and a lead wire 4 extending from the cable 8 is connected to the support tube 6 and quartz. It is wired inside the tube 2 and connected to the temperature measuring element 3.

そして石英管2と支持管6の表面に対して均一且つ一体的にフッ素樹脂膜9を密着コーティングした構成である。このフッ素樹脂膜9は、耐腐食性及び耐熱性に優れたFEP(テトラフルオロエチレン・ヘキサフルオロプロピレン共重合体)からなり、石英管2及び支持管6の表面の保護コート膜となる。そして石英管2はフッ素樹脂膜9により強化され、割れ難くなる。   The surface of the quartz tube 2 and the support tube 6 is coated uniformly and integrally with the fluororesin film 9. The fluororesin film 9 is made of FEP (tetrafluoroethylene / hexafluoropropylene copolymer) excellent in corrosion resistance and heat resistance, and serves as a protective coating film on the surfaces of the quartz tube 2 and the support tube 6. The quartz tube 2 is strengthened by the fluororesin film 9 and is difficult to break.

図2は、上記洗浄液槽用温度センサ1の使用状態の一例を示す図である。洗浄液槽10には基板を洗浄するための洗浄液11が貯留されており、この洗浄液槽10の外部所定位置に設けられた取付部7aに対して例えば固定手段7又は支持管6を固定することにより、フッ素樹脂膜9がコーティングされた石英管2を、洗浄液槽10の洗浄液11中に浸漬させた状態で温度センサ1を設置する。そして石英管2の先端閉塞部2aの内側に設けられる測温素子3は、フッ素樹脂膜9及び石英管2を介して熱伝達される洗浄液11の温度を検知し、リード線4を介して出力する。尚、支持管6の内側から延設されるケーブル8の端部にはキャップ8aが設けられ、キャップ8aから延びる各リード線4には、洗浄液の温度調整を行う外部機器に接続するためのY端子8bが設けられる。   FIG. 2 is a diagram illustrating an example of a usage state of the temperature sensor 1 for the cleaning liquid tank. A cleaning liquid 11 for cleaning the substrate is stored in the cleaning liquid tank 10. For example, the fixing means 7 or the support tube 6 is fixed to a mounting portion 7 a provided at a predetermined position outside the cleaning liquid tank 10. The temperature sensor 1 is installed in a state where the quartz tube 2 coated with the fluororesin film 9 is immersed in the cleaning liquid 11 of the cleaning liquid tank 10. The temperature measuring element 3 provided inside the tip closing portion 2 a of the quartz tube 2 detects the temperature of the cleaning liquid 11 that is transferred through the fluororesin film 9 and the quartz tube 2, and outputs the temperature through the lead wire 4. To do. A cap 8a is provided at the end of the cable 8 extending from the inside of the support tube 6, and each lead wire 4 extending from the cap 8a is connected to an external device for adjusting the temperature of the cleaning liquid. A terminal 8b is provided.

本実施形態において石英管2を密着コーティングするフッ素樹脂9は耐腐食性に優れているので、洗浄液11に浸漬させた状態であってもフッ素樹脂膜9が浸食されることはなく、石英管2の保護機能は持続する。そして石英管2が衝撃等によりクラックを生じるような場合でも、フッ素樹脂膜9に被覆されているので、該クラックが成長し難く、石英管2が崩壊して破片を落下させることはない。また、石英管2がフッ素樹脂膜9と共に割れるような場合があっても、フッ素樹脂膜9に被覆された状態で石英管2が割れ、破片が比較的大きいので、洗浄液11中に細かな破片等が拡散することはなく、洗浄液11の汚染を防止できる。   In the present embodiment, the fluororesin 9 that adheres and coats the quartz tube 2 is excellent in corrosion resistance. Therefore, even if the fluororesin film 9 is immersed in the cleaning liquid 11, the fluororesin film 9 is not eroded. The protection function of lasts. Even when the quartz tube 2 is cracked by an impact or the like, the crack is difficult to grow because the fluororesin film 9 is coated, and the quartz tube 2 does not collapse and drop fragments. Even if the quartz tube 2 may be broken together with the fluororesin film 9, the quartz tube 2 is cracked in a state where it is covered with the fluororesin film 9, and the fragments are relatively large. Etc. do not diffuse and contamination of the cleaning liquid 11 can be prevented.

また石英管2の上部に設けた支持管6を石英管2と共に一体的にフッ素樹脂膜9で密着コーティングするので、例えば揮発性の洗浄液を使用する場合であっても、支持管6が洗浄液の気化成分によって腐食することがない。   Further, since the support tube 6 provided on the quartz tube 2 is integrally coated with the fluororesin film 9 together with the quartz tube 2, for example, even when a volatile cleaning solution is used, the support tube 6 is made of the cleaning solution. No corrosion caused by vaporized components.

石英管2と支持管6の表面に対して一体的にフッ素樹脂膜9を密着形成するに際しては、公知のフッ素樹脂コーティング方法を採用することができる。はじめに石英管2の上部に対して耐熱接着剤5を介して支持管6を取り付け、石英管2と支持管6を固定する。測温素子3及びリード線4は予め石英管2の内側に配置しておいても良いし、石英管2と支持管6を固定した後に各管の内側に挿入して配置しても良い。そして石英管2と支持管6が固定された状態で、各管の表面に付着した油脂等を除去する脱脂工程を行った後、石英管2と支持管6の表面に対して液状のフッ素樹脂を塗布する塗布工程を行う。塗布工程では、スプレー式による塗布や、浸漬式による塗布等が適用され、石英管2と支持管6の表面だけでなく、石英管2と支持管6の継ぎ目部分にも均一にフッ素樹脂が塗布される。   When the fluororesin film 9 is formed in close contact with the surfaces of the quartz tube 2 and the support tube 6, a known fluororesin coating method can be employed. First, the support tube 6 is attached to the upper part of the quartz tube 2 via the heat-resistant adhesive 5, and the quartz tube 2 and the support tube 6 are fixed. The temperature measuring element 3 and the lead wire 4 may be disposed in advance inside the quartz tube 2 or may be disposed by being inserted inside each tube after the quartz tube 2 and the support tube 6 are fixed. And after performing the degreasing process which removes the oil and fat adhering to the surface of each pipe | tube with the quartz tube 2 and the support tube 6 fixed, it is a liquid fluororesin with respect to the surface of the quartz tube 2 and the support tube 6 The coating process of coating is performed. In the application process, application by spraying, application by immersion, or the like is applied, and not only the surface of the quartz tube 2 and the support tube 6 but also the fluorine resin is uniformly applied to the joint portion of the quartz tube 2 and the support tube 6. Is done.

そして所定の膜厚でフッ素樹脂が塗布されると、次に乾燥・焼成工程が行われる。この乾燥・焼成工程では、フッ素樹脂膜9を定着させるために330℃程度の加熱処理が施される。このとき、石英管2と支持管6は互いに耐熱接着剤5で固定されているので、石英管2と支持管6の接着強度が低下することはない。そして乾燥・焼成工程が終了すると、石英管2と支持管6の表面に対して、空気層を介在することなく、硬化したフッ素樹脂膜9が密着コーティングされる。そのため、上記のようにして得られる洗浄液槽用温度センサ1を用い、石英管2を洗浄液11に浸漬して洗浄液の温度を測定する際には、空気層が介在しないので、フッ素樹脂膜9から石英管2への熱伝達が良好であり、石英管2の内部に設けた測温素子3の応答が良好になる。   And if a fluororesin is apply | coated by the predetermined | prescribed film thickness, a drying and baking process will be performed next. In this drying / firing process, a heat treatment of about 330 ° C. is performed to fix the fluororesin film 9. At this time, since the quartz tube 2 and the support tube 6 are fixed to each other by the heat-resistant adhesive 5, the adhesive strength between the quartz tube 2 and the support tube 6 does not decrease. When the drying / firing step is completed, the cured fluororesin film 9 is coated on the surfaces of the quartz tube 2 and the support tube 6 without interposing an air layer. Therefore, when the temperature sensor 1 for the cleaning liquid tank obtained as described above is used to immerse the quartz tube 2 in the cleaning liquid 11 and measure the temperature of the cleaning liquid, there is no air layer. Heat transfer to the quartz tube 2 is good, and the response of the temperature measuring element 3 provided inside the quartz tube 2 is good.

尚、本実施形態では石英管2の上部に支持管6を設ける場合を例示したが、これに限られるものではなく、例えば石英管自体に屈曲部を設け、その石英管を洗浄液槽10の外部所定位置に設けた取付部7aに対して直接取り付ける構造としても良い。   In this embodiment, the case where the support tube 6 is provided on the upper part of the quartz tube 2 is exemplified. However, the present invention is not limited to this. For example, the quartz tube itself is provided with a bent portion, and the quartz tube is disposed outside the cleaning liquid tank 10. It is good also as a structure directly attached with respect to the attaching part 7a provided in the predetermined position.

本発明の一実施形態である洗浄液槽用温度センサの構成を示す断面図である。It is sectional drawing which shows the structure of the temperature sensor for washing | cleaning liquid tanks which is one Embodiment of this invention. 洗浄液槽用温度センサの使用状態の一例を示す図である。It is a figure which shows an example of the use condition of the temperature sensor for washing | cleaning liquid tanks.

符号の説明Explanation of symbols

1 洗浄液槽用温度センサ
2 石英管
3 測温素子
4 リード線
6 支持管
9 フッ素樹脂膜
10 洗浄液槽
11 洗浄液
DESCRIPTION OF SYMBOLS 1 Temperature sensor for washing liquid tanks 2 Quartz tube 3 Temperature measuring element 4 Lead wire 6 Support pipe 9 Fluororesin film 10 Cleaning liquid tank 11 Cleaning liquid

Claims (2)

洗浄液槽の洗浄液に浸漬される石英管の先端閉塞部の内部に測温素子を配置した温度センサにおいて、
前記石英管の外側表面の全面にフッ素樹脂膜を密着コーティングしたことを特徴とする洗浄液槽用温度センサ。
In the temperature sensor in which the temperature measuring element is arranged inside the tip closed portion of the quartz tube immersed in the cleaning liquid in the cleaning liquid tank,
A temperature sensor for a cleaning liquid tank, wherein a fluororesin film is coated on the entire outer surface of the quartz tube.
洗浄液槽の洗浄液に浸漬される石英管の先端閉塞部の内部に測温素子を配置した温度センサにおいて、
前記石英管の上端に該石英管を支持する支持管を取付け、該支持管を挿通して配線されたリード線を前記測温素子に接続しており、
前記石英管の外側表面の全面から前記支持管の外側表面にわたり連続して一体的にフッ素樹脂膜を密着コーティングしたことを特徴とする洗浄液槽用温度センサ。
In the temperature sensor in which the temperature measuring element is arranged inside the tip closed portion of the quartz tube immersed in the cleaning liquid in the cleaning liquid tank,
A support tube that supports the quartz tube is attached to an upper end of the quartz tube, and a lead wire that is wired through the support tube is connected to the temperature measuring element,
A temperature sensor for a cleaning liquid tank, wherein the fluororesin film is continuously and integrally coated continuously from the entire outer surface of the quartz tube to the outer surface of the support tube.
JP2005347675A 2005-12-01 2005-12-01 Temperature sensor for cleaning fluid vessel Pending JP2007155382A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190011897A (en) * 2017-07-26 2019-02-08 에스케이실트론 주식회사 Temperature control apparatus for wafer cleaning equipment and temperature control method using the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190011897A (en) * 2017-07-26 2019-02-08 에스케이실트론 주식회사 Temperature control apparatus for wafer cleaning equipment and temperature control method using the same
KR101967053B1 (en) 2017-07-26 2019-04-08 에스케이실트론 주식회사 Temperature control apparatus for wafer cleaning equipment and temperature control method using the same
US10818526B2 (en) 2017-07-26 2020-10-27 Sk Siltron Co., Ltd Apparatus of controlling temperature in wafer cleaning equipment and method thereof

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