JP5327144B2 - Processing apparatus and processing method - Google Patents

Processing apparatus and processing method Download PDF

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JP5327144B2
JP5327144B2 JP2010137611A JP2010137611A JP5327144B2 JP 5327144 B2 JP5327144 B2 JP 5327144B2 JP 2010137611 A JP2010137611 A JP 2010137611A JP 2010137611 A JP2010137611 A JP 2010137611A JP 5327144 B2 JP5327144 B2 JP 5327144B2
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信博 緒方
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Tokyo Electron Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a substrate processing apparatus which uses a simple structure to hold in place a substrate to be processed, with the number of moving members and actuating mechanisms reduced. <P>SOLUTION: In a processing apparatus 1 for processing a rotating substrate W to be processed, substrate holding sections 2 and 3 which rotate round a vertical axis while holding the substrate W to be processed in place comprise a restricting member 52 which restricts the side peripheral of the substrate W to be processed, a moving member 51 which is capable of rotating round a rotary axis 513 and presses the substrate W to be processed against the restricting member 52 to hold it in place, and a moving member actuating mechanism which rotates the moving member 51. The rotary axis 513 has an energizing force applied thereto which energizes the rotary axis 513 toward a position near the middle part of the substrate W to be processed, causing it to move in the horizontal direction along a guide section 517, whereby the substrate W to be processed differing in size is held in place. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

本発明は、被処理基板を回転させて処理を行う処理装置及び処理方法に関する。   The present invention relates to a processing apparatus and a processing method for performing processing by rotating a substrate to be processed.

従来、半導体ウエハ(以下、ウエハという)等の被処理基板を回転させて処理を行う処理装置として、被処理基板を一枚ずつほぼ水平に保持し、この被処理基板を垂直な回転軸を中心に回転させながら処理液を供給することにより被処理基板の表面に処理液を広げて液処理を行う枚葉式の液処理装置が知られている。   Conventionally, as a processing apparatus for performing processing by rotating a substrate to be processed such as a semiconductor wafer (hereinafter referred to as a wafer), the substrates to be processed are held almost horizontally one by one, and the substrate to be processed is centered on a vertical rotation axis. There is known a single-wafer type liquid processing apparatus for supplying a processing liquid while rotating it to spread the processing liquid on the surface of a substrate to be processed and performing liquid processing.

このような枚葉式の液処理装置に被処理基板を保持する保持機構の一例として、特許文献1には、回転テーブルの周縁部の少なくとも3ヶ所に被処理基板を保持するための保持部材を設ける技術が記載されている。各保持部材はアングル形状(L字状)に形成され、曲折部に設けられた回動支点周りに回動自在となっている。この回動支点からは、上方に向けて、被処理基板の周縁部を保持する保持部が伸びだす一方、回転テーブルの下方側には、保持部材を回動支点周りに回動させるための被加圧部が伸び出している。また保持部材は、前記保持部にて被処理基板の周縁部を保持できるように回転テーブルの中央側へ向けて付勢されている。そして回転テーブルの下方側には昇降自在に構成された加圧部材が設けられており、この加圧部材を上昇させて被加圧部を加圧することにより保持部材を回動支点周りに回動させると、保持部による被処理基板の保持が解除されることとなる。   As an example of a holding mechanism for holding a substrate to be processed in such a single-wafer type liquid processing apparatus, Patent Document 1 discloses a holding member for holding the substrate to be processed at at least three positions on the peripheral edge of the rotary table. The technology to provide is described. Each holding member is formed in an angle shape (L-shape) and is rotatable around a rotation fulcrum provided in the bent portion. From this rotation fulcrum, a holding part for holding the peripheral edge of the substrate to be processed extends upward, and on the lower side of the rotary table, a holding member for rotating the holding member around the rotation fulcrum. The pressurizing part is extended. The holding member is urged toward the center of the turntable so that the peripheral portion of the substrate to be processed can be held by the holding portion. A pressure member configured to be movable up and down is provided on the lower side of the rotary table, and the holding member is rotated around the rotation fulcrum by raising the pressure member and pressurizing the pressurized portion. If it does, holding | maintenance of the to-be-processed substrate by a holding | maintenance part will be cancelled | released.

特開平10−209254号公報:段落0016〜0019、図3、図5JP-A-10-209254: paragraphs 0016 to 0019, FIGS. 3 and 5

しかし特許文献1に記載の洗浄装置では、回動支点を中心に回動する保持部材が3つ以上必要であり、それぞれの保持部材を回動させるための作動機構を持つ必要がある。そのため、装置の構成が複雑となる。   However, in the cleaning apparatus described in Patent Document 1, three or more holding members that rotate about the rotation fulcrum are necessary, and it is necessary to have an operation mechanism for rotating each holding member. This complicates the configuration of the apparatus.

本発明はこのような事情に鑑みてなされたものであり、その目的は、可動部材及び作動機構の数を減らし、簡便な構造で被処理基板を保持する処理装置及び処理方法を提供することにある。   The present invention has been made in view of such circumstances, and an object thereof is to provide a processing apparatus and a processing method for holding a substrate to be processed with a simple structure by reducing the number of movable members and operating mechanisms. is there.

本発明に係る処理装置は、回転する被処理基板を処理する処理装置において、
被処理基板を保持するための基板保持部と、
この基板保持部を鉛直軸周りに回転させる回転駆動部と、
前記基板保持部に固定して設けられ、被処理基板の側周面を規制する規制部材と、
前記基板保持部に設けられ、水平方向の回動軸周りに回動させて、当該被処理基板を前記規制部材側に押し付けて保持する可動部材と、
前記回動軸を保持すると共に、当該回動軸を被処理基板の中央部寄りの位置とこの位置から当該中央部とは反対側に離れた位置との間で水平方向にガイドするためのガイド部と、
前記回動軸を前記被処理基板の中央部寄りの位置側に付勢するための付勢機構と、
前記可動部材を回動させる可動部材作動機構と、を備え、
前記回動軸は、被処理基板が基板保持部に保持されるときに、前記付勢機構の付勢力に抗してガイド部に沿って移動することができることを特徴とする。
A processing apparatus according to the present invention is a processing apparatus for processing a substrate to be rotated.
A substrate holder for holding the substrate to be processed;
A rotation drive unit that rotates the substrate holding unit around a vertical axis;
A regulating member that is fixed to the substrate holding unit and regulates a side peripheral surface of the substrate to be processed;
A movable member that is provided in the substrate holding portion, rotates around a horizontal rotation axis, and holds the substrate to be processed against the regulating member;
A guide for holding the pivot shaft and guiding the pivot shaft in a horizontal direction between a position near the center of the substrate to be processed and a position away from the position on the opposite side to the center. And
An urging mechanism for urging the rotating shaft toward a position closer to the center of the substrate to be processed;
A movable member operating mechanism for rotating the movable member,
The rotating shaft can move along the guide portion against the urging force of the urging mechanism when the substrate to be processed is held by the substrate holding portion.

前記処理装置は以下の特徴を備えていてもよい。
(a)前記可動部材は、回動して被処理基板の側周面に側方から接近して当該被処理基板を前記規制部材側に押し付ける上端部と、下端部とを有し、前記可動部材作動機構は、前記可動部材の下端部を押圧することにより当該可動部材を回動させること。
(b)前記基板保持部は、上部回転板と下部回転板とに上下に分割され、
前記上部回転板は、前記下部回転板に載置される位置と、当該下部回転板から浮上した位置との間で前記上部回転板を昇降させるための昇降機構を備え、
前記下部回転板には前記可動部材が前記回動軸周りに回動して被処理基板の側周面を前記規制部材に押し付けたときに、前記可動部材の下端部が収納される溝部が形成され、
前記上部回転板は、前記下部回転板に載置されるときに、前記溝部から出ている前記可動部材の下端部を押圧してこの可動部材を回動させ、当該可動部材の上端部により被処理基板を前記規制部材側に押し付けて保持させる前記可動部材作動機構であること。
(c)前記上部回転板の上面には、被処理基板を下面側から支持するための突起部が設けられ、上部回転板は、この突起部上に被処理基板を載置した状態で昇降し、前記規制部材及び可動部材に被処理基板を受け渡すこと。
(d)前記上部回転板の底面に設けられ、下方側へ向けて突出する突出部材と、前記下部回転板に設けられ、当該突出部材を挿入するための貫通穴とを備え、前記昇降機構は、当該貫通穴に挿入された突出部材を下部回転板の下面側から押し上げることにより、前記上部回転板を下部回転板から浮上した位置まで上昇させること。
(e)前記下部回転板には、当該下部回転板の上面に載置された上部回転板との間に入り込んだ処理液を集めて排出するための排出孔を備えた排出溝が設けられていること。
(f)前記排出溝は、下部回転板の上面に、周方向に沿って設けられていること。
The processing apparatus may have the following features.
(A) The movable member has an upper end and a lower end that rotate to approach the side peripheral surface of the substrate to be processed from the side and press the substrate to be processed toward the regulating member. The member operating mechanism rotates the movable member by pressing the lower end portion of the movable member.
(B) The substrate holding part is divided into an upper rotating plate and a lower rotating plate in the vertical direction,
The upper rotating plate includes an elevating mechanism for raising and lowering the upper rotating plate between a position placed on the lower rotating plate and a position levitated from the lower rotating plate,
The lower rotating plate is formed with a groove portion in which the lower end portion of the movable member is accommodated when the movable member rotates around the rotation axis and presses the side peripheral surface of the substrate to be processed against the regulating member. And
When the upper rotating plate is placed on the lower rotating plate, the upper rotating plate presses the lower end portion of the movable member protruding from the groove to rotate the movable member, and the upper rotating plate is covered by the upper end portion of the movable member. The movable member operating mechanism that presses and holds the processing substrate against the regulating member.
(C) A protrusion is provided on the upper surface of the upper rotating plate to support the substrate to be processed from the lower surface side, and the upper rotating plate is raised and lowered with the substrate to be processed placed on the protrusion. And delivering the substrate to be processed to the regulating member and the movable member.
(D) a projecting member provided on the bottom surface of the upper rotating plate and projecting downward; and a through hole provided in the lower rotating plate for inserting the projecting member; The upper rotating plate is raised to the position where it floats from the lower rotating plate by pushing up the protruding member inserted into the through hole from the lower surface side of the lower rotating plate.
(E) The lower rotating plate is provided with a discharging groove having a discharging hole for collecting and discharging the processing liquid that has entered between the upper rotating plate mounted on the upper surface of the lower rotating plate. Being.
(F) The discharge groove is provided on the upper surface of the lower rotating plate along the circumferential direction.

(g)前記可動部材は、回動して被処理基板の側周面に側方から接近して当該被処理基板を前記規制部材側に押し付ける上端部と、下端部と、前記上端部を被処理基板の側周面に押し付ける位置へ向けて付勢する第2の付勢機構とを有し、
前記可動部材作動機構は、前記第2の付勢機構の付勢力に抗して前記可動部材の下端部を押圧し、前記上端部を被処理基板の側周面に押し付ける位置から退避させること。
(h)前記可動部材は導電性の部材を含み、この導電性の部材は当該可動部材に帯電した状態で規制された被処理基板を除電するための接地回路の一部を構成していること。
(i)前記基板保持部は、下部回転板と、昇降自在に構成されると共に、この下部回転板上に載置される上部回転板とに上下に分割され、これら下部回転板の上面及び上部回転板の下面には、上部回転板が下部回転板上に載置されたときに互いに接触する領域に導電性の部材が設けられ、前記可動部材と導通して接地回路を構成すること。
(G) The movable member rotates and approaches the side peripheral surface of the substrate to be processed from the side to press the substrate to be processed toward the regulating member, a lower end, and the upper end. A second urging mechanism that urges toward a position to be pressed against the side peripheral surface of the processing substrate;
The movable member actuating mechanism presses the lower end portion of the movable member against the urging force of the second urging mechanism, and retracts the upper end portion from a position where the upper end portion is pressed against the side peripheral surface of the substrate to be processed.
(H) The movable member includes a conductive member, and the conductive member constitutes a part of a ground circuit for discharging the substrate to be processed that is regulated in a state where the movable member is charged. .
(I) The substrate holding unit is configured to be movable up and down and divided into an upper rotary plate placed on the lower rotary plate, and an upper surface and an upper portion of the lower rotary plate. Conductive members are provided on the lower surface of the rotating plate in areas where the upper rotating plate is placed on the lower rotating plate, and are electrically connected to the movable member to form a ground circuit.

本発明によれば、固定の規制部材と、この規制部材に対して被処理基板の側周面を押し付けて当該被処理基板を保持するために、水平方向の回動軸周りに回動自在な可動部材とを基板保持部に設け、さらに当該可動部材の回動軸を被処理基板の中央部寄りの位置とこの位置から当該中央部とは反対側に離れた位置との間で水平方向にガイドするガイド部を設けている。このように可動部材が固定の規制部材に対して被処理基板を押し付ける構造としたので基板保持部の可動部材やこれを作動させる作動機構の数を減らすことができ、装置を簡便な構造にすることができる。
また、可動軸を水平方向にガイドする構造としたことで、大きさの異なる被処理基板を保持する際にも、確実に保持すると共に被処理基板に加わるストレスを抑制することができる。
According to the present invention, in order to hold the substrate to be processed by pressing the fixed peripheral member and the side peripheral surface of the substrate to be processed against the restriction member, the member can be rotated around a horizontal rotation axis. The movable member is provided in the substrate holding portion, and the rotation axis of the movable member is horizontally arranged between a position near the center of the substrate to be processed and a position away from this position on the side opposite to the center. A guide portion for guiding is provided. Since the movable member has a structure in which the substrate to be processed is pressed against the fixed regulating member in this way, the number of movable members of the substrate holding portion and the operating mechanism for operating the movable member can be reduced, and the apparatus has a simple structure. be able to.
Further, the structure in which the movable shaft is guided in the horizontal direction makes it possible to securely hold the substrate to be processed having different sizes and to suppress stress applied to the substrate to be processed.

発明の実施の形態に係る洗浄装置の構成を示す縦断側面図である。It is a vertical side view which shows the structure of the washing | cleaning apparatus which concerns on embodiment of invention. 前記洗浄装置の内部構成を示す一部破断斜視図である。It is a partially broken perspective view which shows the internal structure of the said washing | cleaning apparatus. 前記洗浄装置に設けられている回転板及び支持板の構成を示す分解斜視図である。It is a disassembled perspective view which shows the structure of the rotating plate and support plate which are provided in the said washing | cleaning apparatus. 前記支持板を回転板から浮上した位置まで上昇させた状態における洗浄装置の縦断側面図である。It is a vertical side view of the washing | cleaning apparatus in the state which raised the said support plate to the position which floated from the rotating plate. 前記回転板に設けられたウエハを保持するための可動部材の構成を示す拡大側面図である。It is an enlarged side view which shows the structure of the movable member for hold | maintaining the wafer provided in the said rotating plate. 前記洗浄装置の作用を示す第1の説明図である。It is a 1st explanatory view showing an operation of the washing device. 前記洗浄装置の作用を示す第2の説明図である。It is the 2nd explanatory view showing an operation of the cleaning device. 前記洗浄装置に設けられている可動部材の動作を示す第1の説明図である。It is a 1st explanatory view showing operation of a movable member provided in the cleaning device. 前記可動部材の動作を示す第2の説明図である。It is the 2nd explanatory view showing operation of the movable member. 前記可動部材の動作を示す第3の説明図である。It is the 3rd explanatory view showing operation of the movable member. 他の実施の形態に係る洗浄装置の構成を示す斜視図である。It is a perspective view which shows the structure of the washing | cleaning apparatus which concerns on other embodiment. 前記他の洗浄装置に設けられている可動部材の動作を示す第1の説明図である。It is a 1st explanatory view showing operation of a movable member provided in the other washing device. 前記他の洗浄装置に設けられている可動部材の動作を示す第2の説明図である。It is a 2nd explanatory view showing operation of a movable member provided in the other washing device.

以下、本発明の液処理装置を、被処理基板であるウエハ(半導体ウエハ)の洗浄処理を行う洗浄装置に適用した実施の形態について説明を行う。本実施の形態に係る洗浄装置1の構成について図1〜図5を参照しながら説明する。図1の縦断側面図に示すように、洗浄装置1は鉛直軸をなす回転軸25の上部に設けられ回転自在に構成された回転板2と、上面側に設けられた突起部31にてウエハWを支持し、回転板2に載置されることにより当該回転板2と一体となって回転する支持板3と、ウエハWの側周面を規制する規制部52並びに当該規制部52(規制部材)に向けてウエハWを押し付けることにより、当該ウエハWを保持する可動部材51と、を備えている。この洗浄処理装置1において、支持板3は本実施の形態の上部回転板に相当し、回転板2は下部回転板に相当しており、これら回転板2及び支持板3によって基板保持部が構成されている。   Hereinafter, an embodiment in which the liquid processing apparatus of the present invention is applied to a cleaning apparatus that performs a cleaning process on a wafer (semiconductor wafer) that is a substrate to be processed will be described. The configuration of the cleaning apparatus 1 according to the present embodiment will be described with reference to FIGS. As shown in a vertical side view of FIG. 1, the cleaning apparatus 1 includes a rotating plate 2 provided on an upper portion of a rotating shaft 25 that forms a vertical axis and a rotatable plate 2 and a protrusion 31 provided on the upper surface side. The support plate 3 that supports W and is mounted on the rotating plate 2 to rotate integrally with the rotating plate 2, the regulating portion 52 that regulates the side peripheral surface of the wafer W, and the regulating portion 52 (regulating And a movable member 51 that holds the wafer W by pressing the wafer W toward the member. In this cleaning processing apparatus 1, the support plate 3 corresponds to the upper rotary plate of the present embodiment, the rotary plate 2 corresponds to the lower rotary plate, and the rotary plate 2 and the support plate 3 constitute a substrate holding unit. Has been.

図2に示すように回転板2は、ウエハWよりも大径に構成された円板であり、図3、図4に示すようにその上面側には平面形状が円形の凹部23が形成されている。また回転板2の上面には、回転板2と支持板3の間に入り込んだ洗浄液(処理液)を捕集して、排出孔22から排出するための排液溝21が設けられている。排液溝21は、前記凹部23の周囲を取り囲むように周方向に沿って設けられている。排出孔22は遠心力を利用して排液溝21に捕集された洗浄液を外部へと排出できるように、排出孔22の外周面から回転板2の径方向の外側へ向けて下向きに伸び出しており、その他端は回転板2の外周面に開口している。このとき排液溝21にて捕集された洗浄液が遠心力の作用により排出孔22へと集まりやすくするため、排出孔22を他の排液溝21よりも回転板2の径方向外側に位置させてもよい。この場合には、排液溝21の平面形状は、この排出孔22が設けられている位置に向けて緩やかに突出する扁平な円形形状となる。   As shown in FIG. 2, the rotating plate 2 is a disc having a larger diameter than the wafer W. As shown in FIGS. 3 and 4, a concave portion 23 having a circular planar shape is formed on the upper surface side thereof. ing. Further, a drainage groove 21 is provided on the upper surface of the rotating plate 2 for collecting the cleaning liquid (processing liquid) that has entered between the rotating plate 2 and the support plate 3 and discharging it from the discharge hole 22. The drainage groove 21 is provided along the circumferential direction so as to surround the periphery of the recess 23. The discharge hole 22 extends downward from the outer peripheral surface of the discharge hole 22 toward the outer side in the radial direction of the rotating plate 2 so that the cleaning liquid collected in the drainage groove 21 can be discharged to the outside using centrifugal force. The other end is open on the outer peripheral surface of the rotating plate 2. At this time, since the cleaning liquid collected in the drainage groove 21 is easily collected in the discharge hole 22 by the action of centrifugal force, the discharge hole 22 is positioned on the radially outer side of the rotating plate 2 with respect to the other drainage grooves 21. You may let them. In this case, the planar shape of the drainage groove 21 is a flat circular shape that gently protrudes toward the position where the discharge hole 22 is provided.

回転板2の下面側の中央部には、鉛直方向に伸びる円筒状の回転軸25が接続されており、回転軸25は当該回転軸25を回転させる回転駆動部である回転モーター61に挿入されている。この回転モーター61にて回転軸25を回転させることにより、回転板2は回転軸25の上部にてほぼ水平な状態で回転することができる。   A cylindrical rotating shaft 25 extending in the vertical direction is connected to the central portion on the lower surface side of the rotating plate 2, and the rotating shaft 25 is inserted into a rotating motor 61 that is a rotation driving unit that rotates the rotating shaft 25. ing. By rotating the rotary shaft 25 by the rotary motor 61, the rotary plate 2 can rotate in a substantially horizontal state above the rotary shaft 25.

図2に示すように支持板3は、ウエハWとほぼ同じ大きさの円板であり、図3、図4に示すように支持板3の下面側には、回転板2に設けられた既述の凹部23と嵌合する凸部32が形成されている。凸部32の高さは凹部23の深さと揃えられており、回転板2上に支持板3を載置すると、回転板2の上面と支持板3の下面とが接するようになっている。   As shown in FIG. 2, the support plate 3 is a disc having a size substantially the same as that of the wafer W. As shown in FIGS. 3 and 4, the support plate 3 is provided on the lower surface side of the support plate 3. A convex portion 32 that fits into the concave portion 23 is formed. The height of the convex portion 32 is aligned with the depth of the concave portion 23, and when the support plate 3 is placed on the rotating plate 2, the upper surface of the rotating plate 2 and the lower surface of the supporting plate 3 come into contact with each other.

図2、図3に示すように支持板3の上面には、支持板3の外周縁に沿って複数本の突起部31が設けられており、これらの突起部31上にウエハWを載置することにより支持板3から浮上した位置にウエハWを支持することができる。   As shown in FIGS. 2 and 3, a plurality of protrusions 31 are provided on the upper surface of the support plate 3 along the outer peripheral edge of the support plate 3, and the wafer W is placed on these protrusions 31. By doing so, the wafer W can be supported at a position floating from the support plate 3.

回転板2の下面側に設けられた既述の回転軸25には、円筒形状の回転軸25を上下に貫通するように洗浄液供給管71が挿入されており、この洗浄液供給管71の上端側は回転板2及び支持板3を貫通して支持板3の上面まで伸びだしている。洗浄液供給管71の内部には、洗浄液供給管71の伸びる方向に沿って複数本、例えば4本の洗浄液供給路711が形成されており、洗浄液である各種の薬液やリンス液を切り替えて供給することができる。洗浄液供給管71としては、Nガス等のガスが通るガス供給路が設けられてもよい。 A cleaning liquid supply pipe 71 is inserted into the above-described rotary shaft 25 provided on the lower surface side of the rotary plate 2 so as to penetrate the cylindrical rotary shaft 25 vertically, and the upper end side of the cleaning liquid supply pipe 71 is inserted. Extends through the rotating plate 2 and the support plate 3 to the upper surface of the support plate 3. Inside the cleaning liquid supply pipe 71, a plurality of, for example, four cleaning liquid supply paths 711 are formed along the direction in which the cleaning liquid supply pipe 71 extends, and various chemical liquids and rinse liquids that are cleaning liquids are switched and supplied. be able to. The cleaning liquid supply pipe 71 may be provided with a gas supply path through which a gas such as N 2 gas passes.

図1、図3に示すように洗浄液供給管71の上端部には小型の円盤形状に形成された下面用ノズル73が設けられており、支持板3から浮上した位置に保持されているウエハWの裏面に向けて、当該下面用ノズル73の先端部に設けられている吐出孔731から洗浄液を吐出することができる。これら洗浄液供給管71や下面用ノズル73は回転板2、回転軸25及び支持板3には拘束されておらず、回転板2や支持板3が回転している場合であっても、静止した状態で洗浄液の供給を行う。洗浄液供給管71や下面用ノズル73は本実施の形態の処理液供給部に相当する。   As shown in FIGS. 1 and 3, a lower surface nozzle 73 formed in a small disk shape is provided at the upper end of the cleaning liquid supply pipe 71, and the wafer W held at a position floating from the support plate 3. The cleaning liquid can be discharged from the discharge hole 731 provided at the tip of the lower surface nozzle 73 toward the back surface of the nozzle. The cleaning liquid supply pipe 71 and the lower surface nozzle 73 are not restrained by the rotating plate 2, the rotating shaft 25, and the support plate 3, and are stationary even when the rotating plate 2 and the support plate 3 are rotating. Supply the cleaning solution in the state. The cleaning liquid supply pipe 71 and the lower surface nozzle 73 correspond to the processing liquid supply unit of the present embodiment.

さらに図1、図3に示すように、前記下面用ノズル73はその上端部が傘状に広がっているので、洗浄液供給管71を貫通させるために支持板3側に形成された貫通穴の開口部を塞ぐことができる。この貫通穴が塞がれることによって、支持板3の上面側からの貫通穴内への洗浄液の進入が抑えられ、支持板3の下方側への洗浄液の流れ落ちが抑制される。   Further, as shown in FIGS. 1 and 3, since the upper end portion of the lower surface nozzle 73 spreads out in an umbrella shape, an opening of a through hole formed on the support plate 3 side so as to penetrate the cleaning liquid supply pipe 71 is performed. The part can be closed. When the through hole is closed, the cleaning liquid is prevented from entering the through hole from the upper surface side of the support plate 3, and the cleaning liquid is prevented from flowing down to the lower side of the support plate 3.

図2、図3に示すように支持板3の上面には、洗浄液供給管71を貫通させるために当該支持板3に形成された開口部を覆うように扁平なリング形状のフィン部材72が設けられており、洗浄液供給管71はこのフィン部材72に挿入されている。フィン部材72の上面には、フィン部材72の内側から外側へ向けて旋回するように伸びる細長い羽根板状のフィン721が多数設けられており、これらのフィン721によって羽根車が形成されている。また図1に示すようにフィン部材72の上面は、傘状の下面用ノズル73にて覆われている一方で、フィン部材72の下面側の空間には、不図示の不活性ガス供給部から窒素ガスなどの不活性ガスが供給されている。   As shown in FIGS. 2 and 3, a flat ring-shaped fin member 72 is provided on the upper surface of the support plate 3 so as to cover the opening formed in the support plate 3 so as to penetrate the cleaning liquid supply pipe 71. The cleaning liquid supply pipe 71 is inserted into the fin member 72. On the upper surface of the fin member 72, a large number of elongated blade plate-like fins 721 extending so as to turn from the inside to the outside of the fin member 72 are provided, and these fins 721 form an impeller. As shown in FIG. 1, the upper surface of the fin member 72 is covered with an umbrella-shaped lower surface nozzle 73, while the space on the lower surface side of the fin member 72 is provided with an inert gas supply unit (not shown). An inert gas such as nitrogen gas is supplied.

この状態で回転板2を回転させると、このフィン部材72も支持板3と共に回転し、洗浄液供給管71とフィン部材72の隙間から支持板3の上面側へ流れ出した不活性ガスは、フィン部材72の羽根車の作用により、洗浄液供給管71の貫通部から外側へ向けて押し出されるように流れていく。こうして支持板3の内側から外側へ向けて流れる不活性ガスの流れを形成することにより、下面用ノズル73から吐出された洗浄液が支持板3とウエハWとの間に形成される隙間を流れる際に、フィン部材72の周囲へ向かう洗浄液の流れが促進される。この結果、洗浄液供給管71とフィン部材72との隙間から当該洗浄液が支持板3の下面側へと流れ込みにくくなる。   When the rotating plate 2 is rotated in this state, the fin member 72 also rotates together with the support plate 3, and the inert gas flowing out from the gap between the cleaning liquid supply pipe 71 and the fin member 72 to the upper surface side of the support plate 3 Due to the action of the impeller 72, it flows so as to be pushed outward from the penetrating portion of the cleaning liquid supply pipe 71. By forming the flow of inert gas flowing from the inside to the outside of the support plate 3 in this way, the cleaning liquid discharged from the lower surface nozzle 73 flows through the gap formed between the support plate 3 and the wafer W. In addition, the flow of the cleaning liquid toward the periphery of the fin member 72 is promoted. As a result, it becomes difficult for the cleaning liquid to flow into the lower surface side of the support plate 3 from the gap between the cleaning liquid supply pipe 71 and the fin member 72.

支持板3の下面側には、図2に破線で示した3箇所に、突出部材である連結シャフト35が接続されており、各連結シャフト35は、回転板2の下面側に設けられると共に、本実施の形態の貫通穴をなす鞘部34内に挿入されている。図1に示すように各々の連結シャフト35は、支持板3の下面に固定されると共に鞘部34内に挿入された圧縮バネ36と接続されている。なお図3では連結シャフト35を上下に分割した状態で示してある。   Connection shafts 35 that are protruding members are connected to the lower surface side of the support plate 3 at three locations indicated by broken lines in FIG. 2, and each connection shaft 35 is provided on the lower surface side of the rotating plate 2. It is inserted into the sheath portion 34 forming the through hole of the present embodiment. As shown in FIG. 1, each coupling shaft 35 is fixed to the lower surface of the support plate 3 and connected to a compression spring 36 inserted into the sheath portion 34. In FIG. 3, the connecting shaft 35 is shown in a vertically divided state.

そして通常状態ではこの圧縮バネ36が伸びる方向へとバネの復元力が働くことにより、支持板3が下方側へと引っ張られ、図1に示す位置まで支持板が移動して回転板2上に載置される。他方、連結シャフト35を押し上げると図4に示すように圧縮バネ36が圧縮され、支持板3は回転板2から浮上した状態となる。支持板3を回転板2から浮上させると、後述する中カップ42よりも上方の高さ位置まで突起部31の先端が突出し、これにより他の機器と干渉せずに、外部の搬送アームとの間でウエハWの受け渡しを行うことが可能となる。   In the normal state, the restoring force of the spring acts in the direction in which the compression spring 36 extends, whereby the support plate 3 is pulled downward, and the support plate moves to the position shown in FIG. Placed. On the other hand, when the connecting shaft 35 is pushed up, the compression spring 36 is compressed as shown in FIG. 4, and the support plate 3 floats from the rotating plate 2. When the support plate 3 is lifted from the rotating plate 2, the tip of the protrusion 31 protrudes to a height position above the later-described middle cup 42, so that it does not interfere with other devices and can be connected to an external transfer arm. It becomes possible to transfer the wafer W between them.

図1、図4に示すように洗浄液供給管71には、連結シャフト35の下端部を押し上げることにより支持板3を昇降させるための3本の押し上げ部材65が昇降部材64を介して固定されている。さらにこの洗浄液供給管71は昇降モーター62により昇降自在に構成された連結部材63に接続されているため、この連結部材63を上昇させることにより、押し上げ部材65が上昇し、この押し上げ部材65によって連結シャフト35が押し上げられて支持板3を回転板2から浮上した位置まで移動させる。反対に押し上げ部材65を連結シャフト35の下端よりも下方側へ降下させると支持板3が降下して回転板2に載置された状態となる。この観点において昇降モーター62、連結部材63、洗浄液供給管71、昇降部材64、押し上げ部材65は、支持板3の昇降機構に相当している。   As shown in FIGS. 1 and 4, three push-up members 65 for raising and lowering the support plate 3 by pushing up the lower end portion of the connecting shaft 35 are fixed to the cleaning liquid supply pipe 71 via the raising and lowering members 64. Yes. Further, since the cleaning liquid supply pipe 71 is connected to a connecting member 63 configured to be movable up and down by an elevating motor 62, when the connecting member 63 is raised, the push-up member 65 rises and is connected by the push-up member 65. The shaft 35 is pushed up to move the support plate 3 to a position where it floats from the rotary plate 2. Conversely, when the push-up member 65 is lowered below the lower end of the connecting shaft 35, the support plate 3 is lowered and placed on the rotating plate 2. In this respect, the lifting motor 62, the connecting member 63, the cleaning liquid supply pipe 71, the lifting member 64, and the push-up member 65 correspond to the lifting mechanism of the support plate 3.

ここで押し上げ部材65が連結シャフト35の下方側まで退避したとき、図1に示すように押し上げ部材65の全体が鞘部34から引き出された状態となり、回転板2を回転させる際に両部材34、65が干渉しないようになっている。また回転モーター61は回転板2の回転を停止する際に、押し上げ部材65の上方側に各鞘部34を位置させるように回転板2の停止位置を調整することが可能となっている。   Here, when the push-up member 65 is retracted to the lower side of the connecting shaft 35, the entire push-up member 65 is pulled out from the sheath portion 34 as shown in FIG. 1, and both members 34 are rotated when the rotating plate 2 is rotated. , 65 do not interfere with each other. Further, when the rotation motor 61 stops the rotation of the rotating plate 2, the stop position of the rotating plate 2 can be adjusted so that each sheath portion 34 is positioned above the push-up member 65.

また本例に係る洗浄装置1は、ウエハWの上面側に洗浄液を供給するための上面用ノズル74を備えており、この上面用ノズル74はアーム75の先端部に取り付けられている。そしてこのアーム75を移動させることにより、洗浄液の供給を行うウエハW中央部の上方の供給位置と、ウエハW上から退避した退避位置との間で上面用ノズル74を移動させることができる。   Further, the cleaning apparatus 1 according to this example includes an upper surface nozzle 74 for supplying a cleaning liquid to the upper surface side of the wafer W, and the upper surface nozzle 74 is attached to the tip of the arm 75. By moving the arm 75, the upper surface nozzle 74 can be moved between the supply position above the central portion of the wafer W where the cleaning liquid is supplied and the retracted position retracted from the wafer W.

図2、図3に示すように、回転板2にはその周縁部に沿って中カップ42が設けられており、当該中カップ42はウエハWから飛散した洗浄液を受け止める役割を果たす。図1に示すように中カップ42はその縦断面が円弧をなすドーム状となっており、その上面には支持板3に支持されて昇降するウエハWを通過させるための開口部421が開口している。また中カップ42はその下端縁が回転板2の上面から浮いた状態となっており、ウエハWに供給された洗浄液は中カップ42の下端縁と回転板2の上面との間に形成される隙間から中カップ42の外へと排出される。   As shown in FIGS. 2 and 3, the rotary plate 2 is provided with an intermediate cup 42 along the peripheral edge thereof, and the intermediate cup 42 plays a role of receiving the cleaning liquid scattered from the wafer W. As shown in FIG. 1, the middle cup 42 has a dome shape whose longitudinal section forms an arc, and an opening portion 421 for allowing the wafer W supported by the support plate 3 to pass up and down is opened on the upper surface thereof. ing. Further, the middle cup 42 is in a state where its lower end edge is floated from the upper surface of the rotating plate 2, and the cleaning liquid supplied to the wafer W is formed between the lower end edge of the intermediate cup 42 and the upper surface of the rotating plate 2. It is discharged out of the middle cup 42 from the gap.

さらに中カップ42の内側には、支持板3に保持されたウエハWの外周縁に沿って配置されるリング形状の内カップ41が設けられている。図1に示すように内カップ41には径方向の内側が高く、外側が低くなるように傾斜面が設けられており、中カップ42と回転板2とで囲まれた空間をこの傾斜面によって上下に分割している。そして内カップ41の上端縁は、支持板3上で保持されたウエハWとほぼ面一となる高さ位置に配置されており、また内カップ41の下端縁は回転板2の上面から浮いた状態となっていてこれらの部位41、2の間にも隙間が形成されている。   Furthermore, a ring-shaped inner cup 41 arranged along the outer peripheral edge of the wafer W held on the support plate 3 is provided inside the middle cup 42. As shown in FIG. 1, the inner cup 41 is provided with an inclined surface so that the inner side in the radial direction is higher and the outer side is lower, and the space surrounded by the inner cup 42 and the rotating plate 2 is formed by this inclined surface. It is divided vertically. The upper edge of the inner cup 41 is disposed at a height position that is substantially flush with the wafer W held on the support plate 3, and the lower edge of the inner cup 41 is lifted from the upper surface of the rotating plate 2. A gap is also formed between these portions 41 and 2.

このような構成によりウエハWの上面側に供給された洗浄液は中カップ42と内カップ41との間に形成される空間を通り、回転板2と中カップ42との間の隙間を通って中カップ42の外に排出されることとなる。またウエハWの下面側に供給された洗浄液は内カップ41と回転板2との間に形成される空間及びこれらの間の隙間を通り、さらに中カップ42と回転板2との間の隙間を通って中カップ42の外に排出されるようになっている。   With such a configuration, the cleaning liquid supplied to the upper surface side of the wafer W passes through the space formed between the inner cup 42 and the inner cup 41, and passes through the gap between the rotating plate 2 and the inner cup 42. It will be discharged out of the cup 42. The cleaning liquid supplied to the lower surface side of the wafer W passes through the space formed between the inner cup 41 and the rotating plate 2 and the gap between them, and further passes through the gap between the middle cup 42 and the rotating plate 2. It passes through the middle cup 42 and passes through.

図1に示すように中カップ42及び内カップ41はボルト44によって回転板2に締結されており、回転板2を回転させると、支持板3と同様にこれら中カップ42や内カップ41も回転する構成となっている。また中カップ42の外側の領域には、回転板2や内カップ41を外側から覆うように形成された外カップ43が配置されており、中カップ42と回転板2との間から排出された洗浄液は当該外カップ43で受け止められて排液ライン431より外部へ排出することができる。   As shown in FIG. 1, the middle cup 42 and the inner cup 41 are fastened to the rotary plate 2 by bolts 44, and when the rotary plate 2 is rotated, the middle cup 42 and the inner cup 41 are rotated as well as the support plate 3. It is the composition to do. In addition, an outer cup 43 formed so as to cover the rotating plate 2 and the inner cup 41 from the outside is disposed in an outer region of the inner cup 42 and is discharged from between the inner cup 42 and the rotating plate 2. The cleaning liquid is received by the outer cup 43 and can be discharged to the outside through the drain line 431.

さらに本実施の形態に係る洗浄装置1は、回転板2や支持板3と共に回転するウエハWを保持するために、ウエハWの側周面を規制する規制部52並びに当該規制部52へ向けてウエハWを押し付ける可動部材51を備えている。可動部材51は、支持板3が回転板2上に載置されたときに当該可動部材51に設けられた起立部511がウエハWの側方から近接して当該ウエハWの側周面を規制部側52に押し付ける機能を備えており、本例の洗浄装置1には例えば1個の可動部材51が設けられている。一方、規制部52は予め定められた位置に固定されていて、支持板3が回転板2に載置されたときウエハWの側周面を規制すると共に、前記可動部材51と協働してウエハWを保持する役割を果たす。本例の洗浄装置1では規制部52は支持板3の周方向に沿って、予め定められた位置に複数個設けられている。ここで規制部52は、ウエハWを保持する際に加わる力によって内カップ41が変形するのを防ぐために、ボルト44が貫通している部分に設けられるのが好ましい。   Furthermore, the cleaning apparatus 1 according to the present embodiment is directed toward the restriction portion 52 that restricts the side peripheral surface of the wafer W and the restriction portion 52 in order to hold the wafer W that rotates together with the rotating plate 2 and the support plate 3. A movable member 51 that presses the wafer W is provided. In the movable member 51, when the support plate 3 is placed on the rotating plate 2, the standing portion 511 provided on the movable member 51 comes close to the side of the wafer W to regulate the side peripheral surface of the wafer W. The cleaning device 1 of this example is provided with, for example, one movable member 51. On the other hand, the restricting portion 52 is fixed at a predetermined position, and restricts the side peripheral surface of the wafer W when the support plate 3 is placed on the rotating plate 2 and cooperates with the movable member 51. It plays a role of holding the wafer W. In the cleaning apparatus 1 of the present example, a plurality of restricting portions 52 are provided at predetermined positions along the circumferential direction of the support plate 3. Here, in order to prevent the inner cup 41 from being deformed by a force applied when holding the wafer W, the restricting portion 52 is preferably provided in a portion through which the bolt 44 passes.

図1、図3に示すように本例の可動部材51はL字状の部材として構成され、図5に示すようにウエハWの周縁部から中央部に向かって伸びる下端部である被押圧部515と、この被押圧部515の端部から連続して上方に伸び出した上端部である起立部511とを備えている。起立部511の先端にはウエハWの側周面と対向する位置に溝が形成された規制端512が設けられており、この溝内にウエハWの外周縁部を嵌め込むことにより当該ウエハWの側周面を規制部52側に押し付けて保持する構成となっている。但し、起立部511の先端に溝を備えた規制端512を設けることは必須ではなく、ウエハWの側周面を規制部52側へ押し付けることにより、当該ウエハWが可動部材51及び規制部52によって保持されればよい。   As shown in FIGS. 1 and 3, the movable member 51 of this example is configured as an L-shaped member, and as shown in FIG. 5, a pressed portion that is a lower end portion extending from the peripheral edge portion toward the central portion of the wafer W. 515 and an upright portion 511 that is an upper end portion that continuously extends upward from the end portion of the pressed portion 515. A regulation end 512 having a groove formed at a position facing the side peripheral surface of the wafer W is provided at the tip of the standing portion 511. By fitting the outer peripheral edge of the wafer W into the groove, the wafer W is inserted. The side peripheral surface is pressed against the regulating portion 52 side and held. However, it is not essential to provide the regulation end 512 provided with a groove at the tip of the standing part 511. By pressing the side peripheral surface of the wafer W toward the regulation part 52, the wafer W is moved to the movable member 51 and the regulation part 52. May be held by.

この可動部材51には、回転板2に形成された後述の溝部26内に収まるように被押圧部515が設けられており、支持板3が回転板2から浮上した状態においては、被押圧部515は溝部26から飛び出す方向に付勢されている。被押圧部515のこの機能を実現するため、可動部材51は図3、図4に示すように被押圧部515における回転板2の中心部側の端部が跳ね上がるように水平方向の回動軸513周りに回動自在に軸支されている。   The movable member 51 is provided with a pressed portion 515 so as to be accommodated in a groove portion 26 described later formed in the rotating plate 2, and when the support plate 3 is lifted from the rotating plate 2, the pressed portion 515 is biased in the direction of jumping out from the groove 26. In order to realize this function of the pressed portion 515, the movable member 51 has a horizontal rotation shaft so that the end of the pressed portion 515 on the center side of the rotating plate 2 jumps up as shown in FIGS. It is pivotally supported around 513.

図5に示すように可動部材51の側面は、回動軸513に巻き掛けられたねじりバネ状のバネ部材514と接続されており、このバネ部材514は起立部511を回転板2の径方向外側へ向けて倒す方向に付勢されており、この結果、被押圧部515の端部が跳ね上がって溝部26から飛び出した状態となる。   As shown in FIG. 5, the side surface of the movable member 51 is connected to a torsion spring-like spring member 514 wound around the rotation shaft 513, and the spring member 514 connects the standing portion 511 to the radial direction of the rotating plate 2. As a result, the end of the pressed part 515 jumps up and jumps out of the groove part 26.

このように構成された可動部材51に対し、支持板3を降下させて回転板3に載置すると、可動部材51の被押圧部515が支持板3に押圧されて溝部26内に収まる。当該被押圧部515が押圧されることにより、可動部材51が回動軸周りに回動する。この結果、起立部511が回転板2の中心部側に移動して支持板3上のウエハWを側周面から押すことになる。このとき図2に示すように起立部511は回転板2の溝部26と支持板3との間に形成される隙間から上方側へ伸び出してウエハWを規制、保持している。当該可動部材51の被押圧部515を押圧する部材として支持板3を利用して、上述のように起立部511がウエハWの側周面を押し付けるように可動部材51を回動させるという観点において、当該支持板3は本実施の形態の可動部材作動機構に相当している。   When the support plate 3 is lowered and placed on the rotating plate 3 with respect to the movable member 51 configured as described above, the pressed portion 515 of the movable member 51 is pressed by the support plate 3 and is accommodated in the groove portion 26. When the pressed portion 515 is pressed, the movable member 51 rotates around the rotation axis. As a result, the upright part 511 moves to the center part side of the rotary plate 2 and pushes the wafer W on the support plate 3 from the side peripheral surface. At this time, as shown in FIG. 2, the upright portion 511 extends upward from a gap formed between the groove portion 26 of the rotating plate 2 and the support plate 3 to regulate and hold the wafer W. From the viewpoint of using the support plate 3 as a member for pressing the pressed portion 515 of the movable member 51 and rotating the movable member 51 so that the standing portion 511 presses the side peripheral surface of the wafer W as described above. The support plate 3 corresponds to the movable member operating mechanism of the present embodiment.

また可動部材51の回動軸513は、回転板2の溝部26内に配置された軸受け部516によって保持されており、この軸受け部516には回動軸513を挿入するための軸受け孔517が形成されている。この軸受け孔517は水平方向に細長い形状に形成され、この軸受け孔517内で回動軸513を水平方向にガイドするガイド部の役割を果たしている。そして、保持されるウエハWの中央部寄りの位置と、この位置から当該中央部とは反対側に離れた位置との間で回動軸513を水平に移動させることにより、ウエハWの大きさの誤差(以下、加工公差という)を吸収して異なる位置にてウエハWを側周面から保持することができる。図5に示した例ではガイド部は孔状の軸受け孔517として構成されているが、当該軸受け孔517の上部側を切り欠いた切り欠き形状の軸受けにてガイド部を構成してもよい。   The rotation shaft 513 of the movable member 51 is held by a bearing portion 516 disposed in the groove portion 26 of the rotating plate 2, and the bearing portion 516 has a bearing hole 517 for inserting the rotation shaft 513. Is formed. The bearing hole 517 is formed in an elongated shape in the horizontal direction, and serves as a guide portion that guides the rotating shaft 513 in the horizontal direction in the bearing hole 517. The size of the wafer W is moved by horizontally moving the rotation shaft 513 between a position near the center of the wafer W to be held and a position away from this position on the side opposite to the center. Thus, the wafer W can be held from the side peripheral surface at different positions by absorbing the error (hereinafter referred to as processing tolerance). In the example shown in FIG. 5, the guide portion is configured as a hole-shaped bearing hole 517, but the guide portion may be configured by a notched bearing in which the upper side of the bearing hole 517 is notched.

ここで回動軸513に巻き掛けられたバネ部材514からは線状部518が伸びだしており、この線状部518は軸受け部516の内壁面に係止されて、保持されるウエハWの中央部寄りの位置側へ回動軸513を付勢して押し返している(図5(a))。そして、予め設定された最小径のウエハWよりも大きなウエハWを保持すると、当該ウエハWによりバネ部材514の線状部518の付勢力に抗して回動軸513が外側へと押されることになる(図5(b))。この観点においてバネ部材514及びその線状部518は、本実施の形態の付勢機構に相当している。なお図3では図示の便宜上、軸受け部516の記載は省略してある。   Here, a linear portion 518 extends from the spring member 514 wound around the rotation shaft 513, and the linear portion 518 is locked to the inner wall surface of the bearing portion 516 to hold the wafer W to be held. The rotating shaft 513 is urged and pushed back toward the position closer to the center (FIG. 5A). When a wafer W larger than the preset minimum diameter wafer W is held, the rotating shaft 513 is pushed outward against the urging force of the linear portion 518 of the spring member 514 by the wafer W. (FIG. 5B). In this respect, the spring member 514 and the linear portion 518 thereof correspond to the urging mechanism of the present embodiment. In FIG. 3, for convenience of illustration, the bearing portion 516 is not shown.

また可動部材51は、カーボンブラックを添加したPEEK(PolyEtherEtherKetone、登録商標)などの導電性の部材を含んでいる。そして図1、図3に示すように、回転板2上に支持板3を載置したときに、前記被押圧部515と接触する支持板3の下面側の領域には導電性材料からなる導電部33が設けられており、さらにこの導電部33と接触する回転板2の上面側の領域にも導電性材料からなる導電部24が設けられている。そしてこの導電部24を接地することにより、帯電した状態で可動部材51に保持されるウエハWを除電するための接地回路を構成することができる。   The movable member 51 includes a conductive member such as PEEK (PolyEtherEtherKetone, registered trademark) to which carbon black is added. As shown in FIGS. 1 and 3, when the support plate 3 is placed on the rotating plate 2, the region on the lower surface side of the support plate 3 that comes into contact with the pressed portion 515 is conductive made of a conductive material. A portion 33 is provided, and a conductive portion 24 made of a conductive material is also provided in a region on the upper surface side of the rotating plate 2 in contact with the conductive portion 33. Then, by grounding the conductive portion 24, it is possible to configure a ground circuit for neutralizing the wafer W held on the movable member 51 in a charged state.

次に規制部52の構成について説明すると、本例に係る規制部52は図1〜図3に示すように内カップ41の上端縁部に形成されており、当該内カップ41の周方向に沿って、ボルト44が貫通している位置に設けられている。各規制部52はウエハWの側周面と対向する位置に溝が形成されおり、この溝内にウエハWの外周縁部を嵌め込むことにより当該ウエハWの側周面が規制され、保持される。ここで先に説明したように内カップ41はボルト44を介して回転板2に固定されているので規制部52は回転板2に設けられていることになる。また本規制部52においても溝を形成することは必須ではなく、当該規制部52によりウエハWの横方向のずれが規制され、可動部材51と協働してウエハWを保持することができればよい。   Next, the configuration of the restricting portion 52 will be described. The restricting portion 52 according to this example is formed at the upper edge of the inner cup 41 as shown in FIGS. 1 to 3, and extends along the circumferential direction of the inner cup 41. The bolt 44 is provided at a position where it penetrates. Each restricting portion 52 has a groove formed at a position facing the side peripheral surface of the wafer W. By fitting the outer peripheral edge portion of the wafer W into the groove, the side peripheral surface of the wafer W is restricted and held. The Here, since the inner cup 41 is fixed to the rotating plate 2 via the bolts 44 as described above, the restricting portion 52 is provided on the rotating plate 2. Also, it is not essential to form a groove in the restricting portion 52 as long as the restricting portion 52 restricts the lateral displacement of the wafer W and can hold the wafer W in cooperation with the movable member 51. .

ここで可動部材51と規制部52とを協働させてウエハWを保持する手法について説明すると、4個の規制部52のうち2個の規制部52は回転板2の中心(ウエハWの中央部)を挟んで規制部52の反対側の領域に配置されている。そして支持板3が回転板2に載置され起立部511を移動させてウエハWの側周面を押すと、ウエハWがこの反対側の領域に配置されている規制部52に押し付けられ、当該ウエハWが規制部52の溝内にはめ込まれる。残る2個の規制部52は互いに対向する領域に配置された可動部材51及び2個の規制部52を結ぶ方向とほぼ直交する領域に配置され、これらの方向へのウエハWの横方向へのずれを規制する。   Here, a method for holding the wafer W by causing the movable member 51 and the restricting portion 52 to cooperate with each other will be described. Two of the four restricting portions 52 are arranged at the center of the rotating plate 2 (the center of the wafer W). Is disposed in a region on the opposite side of the restricting portion 52. Then, when the support plate 3 is placed on the rotating plate 2 and the upright portion 511 is moved to push the side peripheral surface of the wafer W, the wafer W is pressed against the restricting portion 52 arranged in the opposite region, The wafer W is fitted into the groove of the restricting portion 52. The remaining two restricting portions 52 are disposed in a region substantially orthogonal to the direction connecting the movable member 51 and the two restricting portions 52 disposed in regions facing each other, and the wafer W in the lateral direction in these directions is disposed. Regulate the deviation.

ここで突起部31によりウエハWを支持する高さ位置は、可動部材51、規制部52にてウエハWが保持される位置よりも低い方が好ましい。この場合にはウエハWは突起部31から可動部材51、規制部52に受け渡された状態でこれら可動部材51、規制部52に保持されることになる。ここで本実施の形態では、ウエハWの横方向へのずれを防止する作用を「規制」と表現し、この横方向のずれの規制に加えてウエハWが上下方向にもずれないように規制する作用を「保持」と表現している。   Here, the height position at which the wafer W is supported by the protrusion 31 is preferably lower than the position at which the wafer W is held by the movable member 51 and the restricting portion 52. In this case, the wafer W is held by the movable member 51 and the restricting portion 52 in a state where the wafer W is transferred from the protrusion 31 to the movable member 51 and the restricting portion 52. Here, in this embodiment, the action of preventing the wafer W from being displaced in the lateral direction is expressed as “regulation”, and in addition to the regulation of the lateral displacement, the wafer W is regulated so as not to be displaced in the vertical direction. This action is expressed as “holding”.

そして下面用ノズル73より吐出される洗浄液からウエハWが受ける水圧が十分に小さくウエハWが浮き上がるおそれがない場合には、可動部材51、規制部52はウエハWの横方向のずれを規制する役割を備えていればよい。ただし各可動部材51、規制部52の溝内にウエハWの外周縁を嵌め込むことにより、洗浄液から受ける水圧が大きくなってもウエハWが上下方向にずれないように保持することができるという利点がある。また例えばウエハWの上面側からのみ洗浄液を供給し、下面側からは洗浄液を供給しないことなどにより、ウエハWが上方側へずれるおそれのない場合などには、ウエハWの側周面部を下面側から支持し、上方側へのウエハWのずれを規制しなくても本発明の「保持」に含まれる。   When the water pressure received by the wafer W from the cleaning liquid discharged from the lower surface nozzle 73 is sufficiently small and the wafer W is not likely to be lifted, the movable member 51 and the regulating portion 52 serve to regulate the lateral displacement of the wafer W. As long as it has. However, by inserting the outer peripheral edge of the wafer W into the groove of each movable member 51 and the restricting portion 52, the wafer W can be held so as not to be displaced in the vertical direction even when the water pressure received from the cleaning liquid increases. There is. Further, for example, when the cleaning liquid is supplied only from the upper surface side of the wafer W and the cleaning liquid is not supplied from the lower surface side, there is no possibility that the wafer W is shifted upward. It is included in the “holding” of the present invention even if the wafer W is not restricted and the deviation of the wafer W upward is not restricted.

以上の構成を備えた洗浄装置1の回転モーター61や昇降モーター62、また洗浄液供給管71に各種洗浄液を供給する不図示の薬液ポンプなどは、例えば図1に示すように制御部8と接続されている。制御部8は例えば図示しないCPUと記憶部とを備えたコンピュータからなり、記憶部には洗浄装置1にてウエハWの液処理を行う動作に係わる制御についてのステップ(命令)群が組まれたプログラムが記録されている。このプログラムは、例えばハードディスク、コンパクトディスク、マグネットオプティカルディスク、メモリーカード等の記憶媒体に格納され、そこからコンピュータにインストールされる。   The rotary motor 61 and the lifting / lowering motor 62 of the cleaning apparatus 1 having the above configuration, the chemical liquid pump (not shown) that supplies various cleaning liquids to the cleaning liquid supply pipe 71, and the like are connected to the control unit 8 as shown in FIG. ing. The control unit 8 is composed of, for example, a computer having a CPU and a storage unit (not shown), and a group of steps (commands) for control related to the operation of performing the liquid processing of the wafer W in the cleaning apparatus 1 is assembled in the storage unit. The program is recorded. This program is stored in a storage medium such as a hard disk, a compact disk, a magnetic optical disk, or a memory card, and installed in the computer therefrom.

以上に説明した構成を備えた洗浄装置1の動作について、図6〜図10を参照しながら説明する。はじめに図6(a)に示すように各押し上げ部材65を上昇させ、連結シャフト35を押し上げて支持板3を上方位置まで移動させて、突起部31の先端を中カップ42の開口部421よりも上方側に突出させた状態で待機する。そしてウエハWを載置した状態で洗浄装置1の上方に進入してきた搬送アームを下方側へと降下させウエハWを突起部31に受け渡した後、搬送アームを洗浄装置1の上方位置から退避させる。   The operation of the cleaning apparatus 1 having the above-described configuration will be described with reference to FIGS. First, as shown in FIG. 6A, each push-up member 65 is raised, the connection shaft 35 is pushed up to move the support plate 3 to the upper position, and the tip of the protrusion 31 is positioned above the opening 421 of the middle cup 42. Wait in a state of protruding upward. Then, after the transfer arm that has entered the cleaning apparatus 1 with the wafer W placed thereon is lowered to the lower side and the wafer W is transferred to the protrusion 31, the transfer arm is retracted from the upper position of the cleaning apparatus 1. .

こうして図6(b)に示すように支持板3の突起部31にウエハWが支持された時点においては、可動部材51はバネ部材514の作用により起立部511が回転板2の径方向外側に向けて倒れ、被押圧部515の端部が跳ね上がって溝部26から飛び出した状態になっている。   6B, when the wafer W is supported on the protrusion 31 of the support plate 3, the movable member 51 has the upright portion 511 moved outward in the radial direction of the rotating plate 2 by the action of the spring member 514. The end part of the pressed part 515 jumps up and protrudes from the groove part 26.

図8(a)に示すように、可動部材51の被押圧部515の端部が溝部26から飛び出した状態となっているところで、押し上げ部材65を降下させると圧縮バネ36が伸び、支持板3が下方側へ向けて移動する。そして図8(b)に示すように溝部26から飛び出した被押圧部515に支持板3の底面が接触すると、支持板3の降下と共に被押圧部515が押圧され、可動部材51の全体が回動軸513周りに回転し、当該被押圧部515が回転板2の溝部26内に収まる。   As shown in FIG. 8A, when the end of the pressed portion 515 of the movable member 51 is protruding from the groove 26, when the push-up member 65 is lowered, the compression spring 36 is extended and the support plate 3 is extended. Moves downward. Then, as shown in FIG. 8B, when the bottom surface of the support plate 3 comes into contact with the pressed portion 515 protruding from the groove portion 26, the pressed portion 515 is pressed with the lowering of the support plate 3, and the entire movable member 51 is rotated. It rotates around the moving shaft 513 and the pressed part 515 is accommodated in the groove part 26 of the rotating plate 2.

一方、起立部511は可動部材51の回動により垂直方向へと立ち上がり回転板2の中心部側に移動する。またウエハWは、その外周縁が規制部52の上端部に達すると、ウエハWの保持位置へ向けて徐々に低くなる傾斜を持つように形成された規制部52の規制面に案内されて保持位置に向けて移動していく。こうして、支持板3が回転板2の上に載置された状態となると、ウエハWの外周縁部に起立部511の規制端512が到達し、当該規制端512の溝内にウエハWが嵌めこまれた状態となる。   On the other hand, the upright portion 511 rises in the vertical direction by the rotation of the movable member 51 and moves to the center portion side of the rotating plate 2. Further, when the outer peripheral edge of the wafer W reaches the upper end portion of the restricting portion 52, the wafer W is guided and held by the restricting surface of the restricting portion 52 formed to have a gradually lowering slope toward the holding position of the wafer W. Move towards the position. Thus, when the support plate 3 is placed on the rotating plate 2, the restriction end 512 of the standing portion 511 reaches the outer peripheral edge of the wafer W, and the wafer W is fitted in the groove of the restriction end 512. It is in a state of being embedded.

そしてこの規制端512によってウエハWが規制部52側へ押し付けられることにより、可動部材51と反対側の領域に配置された規制部52の溝内にもウエハWの外周縁部が嵌め込まれ、これによりウエハWが可動部材51及び規制部52によって保持された状態となる(図7(a)、図8(c))。このようにウエハWを搬送する支持板3を利用して可動部材51を作動させることにより、ウエハWを搬送する動作と、可動部材51及び規制部52によってウエハWを保持する動作とが一つにまとめられ、作動機構の数を減らし、装置構成を簡単にすることができる。   Then, when the wafer W is pressed against the regulating portion 52 by the regulating end 512, the outer peripheral edge portion of the wafer W is also fitted in the groove of the regulating portion 52 arranged in the region opposite to the movable member 51. As a result, the wafer W is held by the movable member 51 and the restricting portion 52 (FIGS. 7A and 8C). Thus, by operating the movable member 51 using the support plate 3 for transporting the wafer W, there is one operation of transporting the wafer W and one of the operations of holding the wafer W by the movable member 51 and the restricting portion 52. Thus, the number of operating mechanisms can be reduced, and the apparatus configuration can be simplified.

またこのとき図8(c)に示すように、可動部材51及び規制部52にてウエハWが保持される支持板3の上面からの高さhは、突起部31の高さよりも高くなっている。このため、上述の動作において突起部31上に載置されたウエハWは可動部材51及び規制部52に受け渡され、各突起部31の先端はウエハWの下面から離れた下方側の位置にて待機することになる。   At this time, as shown in FIG. 8C, the height h from the upper surface of the support plate 3 on which the wafer W is held by the movable member 51 and the restricting portion 52 is higher than the height of the protruding portion 31. Yes. Therefore, the wafer W placed on the protrusion 31 in the above-described operation is transferred to the movable member 51 and the restricting portion 52, and the tip of each protrusion 31 is located at a lower position away from the lower surface of the wafer W. Will wait.

また図5を用いて説明したように可動部材51は、軸受け孔517に沿って回動軸513を水平方向に移動することができるので、加工公差に応じて異なる大きさのウエハWを水平に保持することができる。例えば図8は、ウエハWの径が小さく、可動部材51が当該ウエハWを中央部寄りの位置にて保持する場合の動作を示している。説明の便宜上、図8〜図10においては回転板2及び支持板3、規制部52や可動部材51など、ウエハWの保持に関連する部材のみを示し、各カップ41〜43や洗浄液供給管71等の記載は省略してある。また、例えば300mmのウエハWの場合、ウエハWの直径の公差は±0.2mm程度であり、軸受け孔517の水平部分の長さもこうした誤差を吸収できるように適宜設計される。但し説明の便宜上、図8〜図10の各図ではウエハWの直径の違いや細長に形成された長さ等は実際よりも誇張して示してある。   Further, as described with reference to FIG. 5, the movable member 51 can move the rotation shaft 513 in the horizontal direction along the bearing hole 517, so that the wafers W having different sizes can be horizontally arranged in accordance with the processing tolerance. Can be held. For example, FIG. 8 shows an operation when the diameter of the wafer W is small and the movable member 51 holds the wafer W at a position closer to the center. For convenience of explanation, FIGS. 8 to 10 show only members related to holding of the wafer W, such as the rotating plate 2 and the supporting plate 3, the restricting portion 52 and the movable member 51, and the cups 41 to 43 and the cleaning liquid supply pipe 71. Etc. are omitted. For example, in the case of a 300 mm wafer W, the tolerance of the diameter of the wafer W is about ± 0.2 mm, and the length of the horizontal portion of the bearing hole 517 is appropriately designed so as to absorb such an error. However, for convenience of explanation, in each of FIGS. 8 to 10, the difference in the diameter of the wafer W, the length formed in an elongated shape, and the like are exaggerated from the actual one.

ここで回動軸51は、バネ部材514の作用によってウエハWの中央部寄りの位置に向けて押し返されている。このとき保持されるウエハWの径が可動部材51及び規制部52にて保持可能な最小径となっている場合には、回動軸51は軸受け孔517内を水平方向に移動することなくその場で可動部材51を回動させてウエハWを保持することになる(図8(a)〜図8(c))。   Here, the rotating shaft 51 is pushed back toward the position near the center of the wafer W by the action of the spring member 514. When the diameter of the wafer W held at this time is the minimum diameter that can be held by the movable member 51 and the restricting portion 52, the rotating shaft 51 does not move in the bearing hole 517 in the horizontal direction. The movable member 51 is rotated in the field to hold the wafer W (FIGS. 8A to 8C).

これに対して図9、図10は、ウエハWの径が図8に示した例よりも大きく、可動部材51が前記中央部寄りの位置よりも外側の位置にて当該ウエハWを保持する場合の動作を示している。図9、図10において、ウエハWに示した破線は、図8に示した径の小さなウエハWの両端位置を示している。   On the other hand, in FIGS. 9 and 10, the diameter of the wafer W is larger than the example shown in FIG. 8, and the movable member 51 holds the wafer W at a position outside the position near the center. Shows the operation. 9 and 10, the broken lines shown on the wafer W indicate the positions of both ends of the wafer W having a small diameter shown in FIG.

図9(a)に示すように、支持板3の突起部31上に径の大きなウエハWが載置され、支持板3を下方側へ向けて移動させると、図8(b)の場合と同様に溝部26から飛び出した被押圧部515が支持板3の底面にて押圧される。この結果、図9(b)に示すように可動部材51全体が回動軸513周りに回転し、ウエハWの周縁部へ向けて起立部511が移動していく。また図9(b)に示した例においてもウエハWは規制部52の規制面によって保持位置へ向けて案内されていく。   As shown in FIG. 9A, when a wafer W having a large diameter is placed on the protrusion 31 of the support plate 3 and the support plate 3 is moved downward, the case of FIG. Similarly, the pressed portion 515 that protrudes from the groove 26 is pressed on the bottom surface of the support plate 3. As a result, the entire movable member 51 rotates around the rotation shaft 513 as shown in FIG. 9B, and the upright portion 511 moves toward the peripheral edge of the wafer W. In the example shown in FIG. 9B, the wafer W is guided toward the holding position by the restriction surface of the restriction portion 52.

この状態にてさらに支持板3を降下させていくと、支持板3が回転板2上に載置される前に起立部511の規制端512がウエハWの外周縁部に到達する(図9(c))。こうしてウエハWと規制端512とが接触すると、ウエハWの中心を挟んで反対側の領域では、当該ウエハWの外周縁部は規制部52と接しているので、ウエハWの横方向への移動が規制され、起立部511は回転板2の内側へ向けて移動することができなくなる。   When the support plate 3 is further lowered in this state, the restricting end 512 of the standing portion 511 reaches the outer peripheral edge of the wafer W before the support plate 3 is placed on the rotating plate 2 (FIG. 9). (C)). When the wafer W and the regulating end 512 are in contact with each other in this manner, the outer peripheral edge portion of the wafer W is in contact with the regulating portion 52 in the region opposite to the center of the wafer W, so that the wafer W moves in the lateral direction. Is restricted, and the upright portion 511 cannot move toward the inside of the rotating plate 2.

そしてさらに支持板3を降下させると、被押圧部515を押し下げてもウエハWが存在することにより起立部511が回転板2の内側へ向けて移動できないことから、被押圧部515を押し下げる力は、軸受け孔517内で回動軸513を移動させる力に変換される。この結果、回動軸513はウエハWにより押され、軸受け孔517にガイドされながら、バネ部材514の線状部518から受ける付勢力に抗して外側へ向けて移動していく。   When the support plate 3 is further lowered, even if the pressed portion 515 is pushed down, the upright portion 511 cannot move toward the inside of the rotating plate 2 due to the presence of the wafer W. This is converted into a force for moving the rotation shaft 513 in the bearing hole 517. As a result, the rotation shaft 513 is pushed by the wafer W and is moved outwardly against the biasing force received from the linear portion 518 of the spring member 514 while being guided by the bearing hole 517.

そして支持板3が回転板2上に載置され、被押圧部515が溝部26内に収まると、図10に示すようにウエハWは可動部材51及び規制部52によって保持される。ここで、径の異なるウエハWが保持されている状態を図8(c)と図10とで比較すると、回動軸513が軸受け孔517にガイドされて移動した結果、起立部511の規制端512がウエハWと接する位置が回転板2の径方向で異なっている。   When the support plate 3 is placed on the rotating plate 2 and the pressed portion 515 is accommodated in the groove portion 26, the wafer W is held by the movable member 51 and the restricting portion 52 as shown in FIG. Here, when the state in which the wafers W having different diameters are held is compared between FIG. 8C and FIG. 10, as a result of the rotation shaft 513 being guided by the bearing hole 517 and moved, The position where 512 contacts the wafer W is different in the radial direction of the rotating plate 2.

洗浄装置1全体の動作説明に戻ると、以上に説明したようにウエハWが可動部材51及び規制部52に保持されると、図7(a)に示すように導電性の部材からなる可動部材51と支持板3の導電部33と回転板2の導電部24とが互いに接触しあって接地回路が形成される。このため搬送アームから受け渡されたウエハWが帯電している場合であっても、当該ウエハWが可動部材51と接触することにより電荷が放電されてウエハWを除電することができる。この結果、ウエハWへのパーティクル等の付着を抑制する効果がある。またこのとき押し上げ部材65はその全体が鞘部34から引き出された状態となり、回転板2を回転させても鞘部34と押し上げ部材65とは互いに干渉しない。   Returning to the description of the overall operation of the cleaning apparatus 1, as described above, when the wafer W is held by the movable member 51 and the restricting portion 52, the movable member made of a conductive member as shown in FIG. 51, the conductive portion 33 of the support plate 3 and the conductive portion 24 of the rotating plate 2 are in contact with each other to form a ground circuit. For this reason, even when the wafer W delivered from the transfer arm is charged, when the wafer W comes into contact with the movable member 51, the charge is discharged and the wafer W can be discharged. As a result, there is an effect of suppressing adhesion of particles or the like to the wafer W. At this time, the push-up member 65 is entirely pulled out from the sheath portion 34, and the sheath portion 34 and the push-up member 65 do not interfere with each other even if the rotating plate 2 is rotated.

しかる後、図7(b)に示すようにアーム75を動かして上面用ノズル74をウエハWの中央部の上方位置に移動させ、回転板2の回転を開始する。これにより、回転板2、支持板3、可動部材51及びウエハWや内カップ41、中カップ42が一体となって回転を開始する。このとき、既述のように支持板3の連結シャフト35が回転板2の鞘部34内に挿入された状態でこれら支持板3、回転板2が回転するので、上下に分割された保持部材(回転板2及び支持板2)を一体に回転させることが容易となる。そして回転板2の回転速度が予め設定した回転速度となったら下面用ノズル73及び上面用ノズル74から洗浄液の供給を開始する。   Thereafter, as shown in FIG. 7B, the arm 75 is moved to move the upper surface nozzle 74 to a position above the center of the wafer W, and the rotation of the rotating plate 2 is started. As a result, the rotation plate 2, the support plate 3, the movable member 51, the wafer W, the inner cup 41, and the middle cup 42 start to rotate together. At this time, since the support plate 3 and the rotary plate 2 are rotated in a state where the connecting shaft 35 of the support plate 3 is inserted into the sheath portion 34 of the rotary plate 2 as described above, the holding member divided in the vertical direction. It becomes easy to rotate (rotating plate 2 and supporting plate 2) integrally. When the rotation speed of the rotary plate 2 reaches a preset rotation speed, the supply of the cleaning liquid is started from the lower surface nozzle 73 and the upper surface nozzle 74.

洗浄処理は、例えばアルカリ性の薬液であるSC1液(アンモニアと過酸化水素水の混合液)によるパーティクルや有機性の汚染物質の除去→リンス液である脱イオン水(DeIonized Water:DIW)によるリンス洗浄→酸性薬液である希フッ酸水溶液(以下、DHF(Diluted HydroFluoric acid))による自然酸化膜の除去→DIWによるリンス洗浄のといったように、その目的に応じてウエハWの上下面に各々供給される洗浄液が順次切り替えられる。   The cleaning process is, for example, removal of particles and organic pollutants with an SC1 solution (a mixture of ammonia and hydrogen peroxide solution), which is an alkaline chemical solution, and a rinse with deionized water (DIW), which is a rinse solution. → Removal of natural oxide film by dilute hydrofluoric acid (hereinafter referred to as DHF), which is an acidic chemical solution → Rinse cleaning by DIW, and so on, depending on the purpose. The cleaning liquid is sequentially switched.

これにより図7(b)中に実線の矢印で示すようにウエハWの上面側、下面側に供給された洗浄液はウエハWの回転による遠心力によりこれら上面側、下面側においてウエハWの全面に広がって各々の洗浄液の目的に応じた洗浄処理が実行される。洗浄後の洗浄液は中カップ42の下端と回転板2の上面との隙間から外カップ43内に振り落とされ、当該外カップ43内で捕集されて排液ライン431を介して外部へと排出される。   As a result, as indicated by solid arrows in FIG. 7B, the cleaning liquid supplied to the upper and lower surfaces of the wafer W is applied to the entire surface of the wafer W on the upper and lower surfaces by the centrifugal force generated by the rotation of the wafer W. The cleaning process is performed according to the purpose of each cleaning liquid. The cleaning liquid after cleaning is shaken down into the outer cup 43 through the gap between the lower end of the middle cup 42 and the upper surface of the rotating plate 2, collected in the outer cup 43, and discharged to the outside through the drain line 431. Is done.

このとき仮に、回転板2と支持板3との間に少量の洗浄液が入り込んだ場合であっても、この洗浄液は排液溝21にて捕集され、排出孔22を介して外部へと排出される。このため回転モーター61や昇降モーター62が設けられている回転板2の中央部側にまで洗浄液が到達し、洗浄液供給管71と回転板2、支持板3との隙間を介して洗浄液がこれらの機器まで流れ出すといったトラブルの発生を低減することができる。   At this time, even if a small amount of cleaning liquid enters between the rotating plate 2 and the support plate 3, the cleaning liquid is collected in the drain groove 21 and discharged to the outside through the discharge hole 22. Is done. For this reason, the cleaning liquid reaches the central portion of the rotary plate 2 where the rotary motor 61 and the lifting motor 62 are provided, and the cleaning liquid passes through the gap between the cleaning liquid supply pipe 71, the rotary plate 2, and the support plate 3. It is possible to reduce the occurrence of trouble such as flowing out to the equipment.

このほか洗浄液供給管71が貫通している支持板3の中央部にはフィン部材72が設けられており、このフィン部材72はその下面側の空間に供給された不活性ガスが洗浄液供給管71とフィン部材72の隙間を介して支持板3の上面側へと流れ出してきたとき、羽根車の作用により不活性ガスを支持板3の径方向外側へと押し出す。この結果、図7(b)に破線の矢印で示すように不活性ガスの気流が形成され、この気流により、支持板3とウエハWとの間に形成される隙間を流れる洗浄液が洗浄液供給管71とフィン部材72との隙間を介して支持板3の下面側へと流れ込む可能性を小さくしている。   In addition, a fin member 72 is provided at the center of the support plate 3 through which the cleaning liquid supply pipe 71 passes, and the inert gas supplied to the space on the lower surface side of the fin member 72 is supplied to the cleaning liquid supply pipe 71. When the gas flows out to the upper surface side of the support plate 3 through the gap between the fin member 72 and the fin member 72, the inert gas is pushed out radially outward of the support plate 3 by the action of the impeller. As a result, an inert gas stream is formed as indicated by the dashed arrow in FIG. 7B, and the cleaning liquid flowing through the gap formed between the support plate 3 and the wafer W is washed by the cleaning liquid supply pipe. The possibility of flowing into the lower surface side of the support plate 3 through the gap between 71 and the fin member 72 is reduced.

こうして予め設定した時間だけ各種の洗浄液を供給したら、下面用ノズル73及び上面用ノズル74からの洗浄液の供給を停止する一方で回転板2の回転を継続する。これによりウエハWのスピン乾燥が実行されると共に、洗浄後のウエハWと接触する可動部材51、規制部52や突起部31についてもスピン乾燥が行われ、これらのピン51、52、31も乾燥した状態となる。特に突起部31は、既述のようにウエハWの下面から離れた下方側の位置にて待機し、ウエハWとは接触していない。このため、スピン乾燥時の液残りが発生しにくく、ウエハWの下面におけるウォーターマークの形成を抑制することができる。   When various kinds of cleaning liquid are supplied for the preset time in this way, the supply of the cleaning liquid from the lower surface nozzle 73 and the upper surface nozzle 74 is stopped while the rotation of the rotating plate 2 is continued. As a result, the spin drying of the wafer W is executed, the spin drying is also performed on the movable member 51, the regulating portion 52, and the protruding portion 31 that are in contact with the cleaned wafer W, and the pins 51, 52, and 31 are also dried. It will be in the state. In particular, the protrusion 31 stands by at a lower position away from the lower surface of the wafer W as described above, and is not in contact with the wafer W. For this reason, the liquid residue at the time of spin drying hardly occurs, and the formation of the watermark on the lower surface of the wafer W can be suppressed.

そして予め設定した時間だけスピン乾燥を実行したら、回転板2の回転を終了し、鞘部34が各押し上げ部材65の上方側に位置するように回転板2を停止させる。しかる後、押し上げ部材65を上昇させ支持板3が回転板2から浮上した位置まで移動させることにより、搬入時とは反対の順序で外部の搬送アームへとウエハWを受け渡され当該ウエハWについての洗浄処理が終了する。   When spin drying is executed for a preset time, the rotation of the rotating plate 2 is terminated, and the rotating plate 2 is stopped so that the sheath portion 34 is positioned above each push-up member 65. Thereafter, the push-up member 65 is raised and moved to a position where the support plate 3 is lifted from the rotating plate 2, so that the wafer W is delivered to the external transfer arm in the order opposite to that at the time of loading. The cleaning process ends.

本実施の形態に係る洗浄装置1によれば以下の効果がある。複数の固定された規制部52側に対してウエハWの側周面を押し付けて当該ウエハWを保持するために、水平方向の回動軸513周りに回動自在な可動部材51を回転板2に1つ設け、さらに当該可動部材51の回動軸513をウエハWの中央部寄りの位置とこの位置から当該中央部とは反対側に離れた位置との間で水平方向にガイドする軸受け孔517を設けている。そして前記回動軸513をウエハWの中央部寄りの位置側に付勢し、ウエハWを保持するときに回動軸513が前記付勢力に抗して軸受け孔517に沿って外側に移動することができる。かかる構成にすることにより、基板保持部(回転板2、支持板3)に設けられた可動部材51の数を減らすことができ、また当該可動部材51を作動させる可動部材作動機構(本例では可動部材51を回動させる部材としての支持板3)を簡便な構造にすることができる。   The cleaning device 1 according to the present embodiment has the following effects. In order to hold the wafer W by pressing the side peripheral surface of the wafer W against the plurality of fixed regulating portions 52, a movable member 51 that is rotatable around a horizontal rotation shaft 513 is provided on the rotating plate 2. And a bearing hole that guides the rotation shaft 513 of the movable member 51 in a horizontal direction between a position near the center of the wafer W and a position away from this position on the side opposite to the center. 517 is provided. The rotating shaft 513 is urged toward the position near the center of the wafer W, and when the wafer W is held, the rotating shaft 513 moves outward along the bearing hole 517 against the urging force. be able to. With this configuration, it is possible to reduce the number of movable members 51 provided on the substrate holding portion (the rotary plate 2 and the support plate 3), and to move the movable member 51 in this example (in this example). The support plate 3) as a member for rotating the movable member 51 can have a simple structure.

また、可動軸513を水平方向に移動できる構造としたことで、大きさの異なるウエハWを保持する際に、ウエハWに加わるストレスを抑えて、ウエハWの割れや、保持不良の発生を抑制しつつ、確実にウエハWを保持することができる。さらに大きさの異なるウエハWを保持する際に、可動部材51とウエハWが接触する高さの変化を抑え、大きさの異なるウエハWであっても水平に保持することができる。   Further, since the movable shaft 513 can be moved in the horizontal direction, when holding wafers W of different sizes, the stress applied to the wafers W is suppressed, and cracking of the wafers W and occurrence of defective holding are suppressed. However, the wafer W can be reliably held. Further, when holding wafers W of different sizes, a change in the height at which the movable member 51 and the wafer W come into contact with each other can be suppressed, and even wafers of different sizes can be held horizontally.

ここで本発明は、ウエハWと共に回転する可動部材51及び規制部52を利用してウエハWを保持し、保持されるウエハWの径の違いに応じて可動部材51が水平方向に移動可能とすることにより、水平にウエハWを保持する構成を備えていればよく、その具体的な構成は、図1〜図10に示した洗浄装置1の例に限られるものではない。例えば図11〜図13に示した洗浄装置1aは、回転板2上に載置される支持板3を備えず、専用の押圧部材101を利用して可動部材51を作動させる第2の実施の形態を示している。図中、第1の実施の形態に示した洗浄理装置1と共通の構成要素には、図1〜図10に示したものと同じ符号を付してある。   Here, according to the present invention, the movable member 51 that rotates together with the wafer W is used to hold the wafer W, and the movable member 51 can move in the horizontal direction according to the difference in the diameter of the held wafer W. Thus, it is only necessary to have a configuration for holding the wafer W horizontally, and the specific configuration is not limited to the example of the cleaning apparatus 1 shown in FIGS. For example, the cleaning apparatus 1a shown in FIGS. 11 to 13 does not include the support plate 3 placed on the rotating plate 2, and uses the dedicated pressing member 101 to operate the movable member 51 in the second embodiment. The form is shown. In the figure, the same reference numerals as those shown in FIGS. 1 to 10 are attached to the components common to the cleaning apparatus 1 shown in the first embodiment.

図11に示した洗浄装置1aは、回転板2(下部回転板)と一体となって回転する支持板3(上部回転板)が設けられていない点と、可動部材51の被押圧部515が回転板2の下方側へ向けて伸びだしており、この被押圧部515を押圧するための専用の押圧部材101を備えている点と、が第1の実施の形態に係る洗浄装置1と異なっている。また図11では液受け用の各種カップ41〜43などの記載は省略してある。   In the cleaning device 1a shown in FIG. 11, the support plate 3 (upper rotary plate) that rotates integrally with the rotary plate 2 (lower rotary plate) is not provided, and the pressed portion 515 of the movable member 51 has a pressed portion 515. It differs from the cleaning apparatus 1 according to the first embodiment in that it extends toward the lower side of the rotating plate 2 and has a dedicated pressing member 101 for pressing the pressed portion 515. ing. In FIG. 11, the description of the various cups 41 to 43 for receiving the liquid is omitted.

図11に示した洗浄装置1aは、鉛直方向に伸びる回転軸25の上端部に設けられた円板形状の回転板2の外周縁部に固定して設けられた2つの規制部材52と、同じくこの回転板2の外周縁部に設けられた1つの可動部材51とを備えている。可動部材51は、回転板2の外周縁部に固定された軸受け部516に支持され、前記の規制部材52に対して回転板2の中心を挟んで反対側の領域に配置されている。   The cleaning device 1a shown in FIG. 11 is similar to the two regulating members 52 fixed to the outer peripheral edge of the disc-shaped rotating plate 2 provided at the upper end of the rotating shaft 25 extending in the vertical direction. And one movable member 51 provided on the outer peripheral edge of the rotating plate 2. The movable member 51 is supported by a bearing portion 516 fixed to the outer peripheral edge of the rotating plate 2, and is disposed in a region on the opposite side of the regulating member 52 across the center of the rotating plate 2.

前記軸受け部516には、水平方向に伸びる細長い軸受け孔517が形成され、この軸受け孔517内に可動部材51の回動軸513が挿入されている点は第1の実施の形態の洗浄装置1と同様である。図12(a)に模式的に示すように、回動軸513からは上方側へ向けて上端部である起立部511が伸びだす一方、当該回動軸513からは、回転板2の下面側へ向けて下端部である被押圧部材515が斜め下方へと伸びだしている。   The bearing portion 516 is formed with an elongated bearing hole 517 extending in the horizontal direction, and the rotating shaft 513 of the movable member 51 is inserted into the bearing hole 517 in the cleaning device 1 of the first embodiment. It is the same. As schematically shown in FIG. 12A, an upright portion 511 that is an upper end portion extends upward from the rotation shaft 513, while the lower surface side of the rotating plate 2 extends from the rotation shaft 513. A pressed member 515 which is a lower end portion extends toward the lower side.

ここで回動軸514にはねじりバネ状のバネ部材514が巻きかけられており、当該バネ部材514は、可動部材51を回動軸513周りに回動させ、ウエハWの側周面を規制部材52側に押し付ける位置へ向けて起立部511を倒すように付勢されている。この観点において、当該バネ部材514は、本実施の形態の第2の付勢機構に相当し、当該第2の付勢機構はウエハWの側周面を規制部材52側へ押し付けるように可動部材51を回動させる可動部材作動機構として作用することとなる。またバネ部材514から伸び出した線状部518が軸受け部516の内壁面に係止されて回動軸513をウエハWの中央部寄りの位置へ押し返すことにより、付勢機構を構成している点は、第1の実施の形態と同様である。   Here, a torsion spring-like spring member 514 is wound around the rotation shaft 514, and the spring member 514 rotates the movable member 51 around the rotation shaft 513 to regulate the side peripheral surface of the wafer W. The erection portion 511 is biased toward the position to be pressed against the member 52 side. In this respect, the spring member 514 corresponds to the second biasing mechanism of the present embodiment, and the second biasing mechanism is a movable member that presses the side peripheral surface of the wafer W toward the regulating member 52. It will act as a movable member operating mechanism that rotates 51. Further, the linear portion 518 extending from the spring member 514 is locked to the inner wall surface of the bearing portion 516 and pushes the rotating shaft 513 back to a position near the center of the wafer W, thereby constituting an urging mechanism. The point is the same as in the first embodiment.

そして本例の被押圧部515は、小型の筐体状に形成された軸受け部516の底面よりも下方側へ向けて伸びだしている。そしてこの被押圧部515を押し上げることにより、前記バネ部材514の付勢力に抗して起立部511をウエハWの側周面から離れる方向に移動させることができる。これにより、ウエハWを保持する際に起立部511をウエハWの保持位置から一旦、退避させてウエハWと起立部511との干渉を避けることができる。   And the to-be-pressed part 515 of this example has extended toward the downward side rather than the bottom face of the bearing part 516 formed in the small housing | casing shape. By pushing up the pressed portion 515, the standing portion 511 can be moved away from the side peripheral surface of the wafer W against the biasing force of the spring member 514. As a result, when the wafer W is held, the standing portion 511 can be temporarily withdrawn from the holding position of the wafer W to avoid interference between the wafer W and the standing portion 511.

上述の退避動作を実行するため、本例の洗浄装置1aは、図11に示すように、前記押圧部材515を押圧し、起立部511を移動させるための押圧部材101を備えている。押圧部材101は、逆L字状に形成され、また回転板2の下方側へ伸び出した被押圧部材515のさらに下方側の位置に配置されている。これにより、前記L字の横棒部を上昇させて被押圧部515を押し上げ、また当該横棒部を降下させて被押圧部515の押し上げを解除することができる。図中、102は押圧部材101を昇降させるための昇降機構、103はその支持台である。   In order to perform the above-described retreating operation, the cleaning apparatus 1a of this example includes a pressing member 101 for pressing the pressing member 515 and moving the standing portion 511 as shown in FIG. The pressing member 101 is formed in an inverted L shape, and is disposed at a position on the lower side of the pressed member 515 extending to the lower side of the rotating plate 2. As a result, the L-shaped horizontal bar portion can be raised to push up the pressed portion 515, and the horizontal bar portion can be lowered to release the pressed portion 515. In the figure, reference numeral 102 denotes an elevating mechanism for elevating and lowering the pressing member 101, and 103 denotes a support base thereof.

ここで本例では被押圧部515を回転板2の下方側へ伸びだすように構成し、押圧部材101を昇降させることによりバネ部材514の付勢力に抗して可動部材51を回動軸513周りに回動させる構成を示したが、被押圧部515と押圧部材101との相対的な位置関係は、この例に限定されるものではない。例えば被押圧部515を垂直方向、下方側へと伸びだすように形成すると共に、押圧部材101を当該被押圧部515に対して、回転板2の径方向外側の側方位置に配置し、当該押圧部515を横方向に進退させて被押圧部515を押し戻すようにしてもよい。
以下、図12〜図13を参照しながら当該洗浄装置1aの可動部材51及び規制部材52にてウエハWを保持する動作について説明する。これらの図においても回転軸25や回転モーター61などの記載は省略してある。
In this example, the pressed portion 515 is configured to extend downward from the rotary plate 2, and the pressing member 101 is moved up and down to move the movable member 51 against the urging force of the spring member 514. Although the structure rotated around was shown, the relative positional relationship of the to-be-pressed part 515 and the press member 101 is not limited to this example. For example, the pressed portion 515 is formed so as to extend downward in the vertical direction, and the pressing member 101 is disposed at a lateral position on the radially outer side of the rotating plate 2 with respect to the pressed portion 515, The pressed portion 515 may be moved back and forth in the lateral direction to push back the pressed portion 515.
Hereinafter, the operation of holding the wafer W by the movable member 51 and the regulating member 52 of the cleaning apparatus 1a will be described with reference to FIGS. Also in these drawings, description of the rotary shaft 25, the rotary motor 61, and the like is omitted.

はじめに被押圧部515を押し上げていない状態では、図12(a)に示すように起立部511は、保持されるウエハWの中央部側へ向けて倒れた状態となっている。そして処理対象のウエハWが搬送アームのピンセット11上に載置された状態で回転板2の上方位置に搬送されてきたら、押圧部材101を上昇させて被押圧部515を押し上げ、回動軸513周りに可動部材51を回転させ、ウエハWを保持する位置から起立部511を一旦、退避させる(図12(b))。   First, in a state where the pressed portion 515 is not pushed up, the standing portion 511 is tilted toward the central portion of the wafer W to be held as shown in FIG. When the wafer W to be processed is transferred to the upper position of the rotating plate 2 while being placed on the tweezers 11 of the transfer arm, the pressing member 101 is raised to push up the pressed portion 515, and the rotation shaft 513. The movable member 51 is rotated around, and the upright portion 511 is temporarily retracted from the position where the wafer W is held (FIG. 12B).

しかる後、ウエハWを降下させ、当該ウエハWの外周縁が規制部材52の上端部に設けられた規制面に案内されて保持位置へ向けて移動する高さ位置に到達したら、押圧部材101を降下させていく。すると、バネ部材514の作用により、可動部材51が回動軸513周りに回動し、起立部511がウエハWの外側の位置から中央部寄りの位置へ向けて移動していく。そしてウエハWの外周縁部に起立部511の規制端512が到達すると、図13(a)に示すように当該規制端512の溝内にウエハWが嵌めこまれた状態となる。   After that, when the wafer W is lowered and reaches the height position where the outer peripheral edge of the wafer W is guided by the restriction surface provided at the upper end portion of the restriction member 52 and moves toward the holding position, the pressing member 101 is moved. I will let you go down. Then, due to the action of the spring member 514, the movable member 51 rotates around the rotation shaft 513, and the upright portion 511 moves from the position outside the wafer W toward the position near the center. When the restriction end 512 of the upright portion 511 reaches the outer peripheral edge of the wafer W, the wafer W is fitted in the groove of the restriction end 512 as shown in FIG.

この状態で引き続き押圧部材101を降下させると、起立部511は回転板2の内側へ向けて移動できないことから、起立部511を倒す方向へ働くバネ部材514の力は、軸受け孔517内で回動軸513を移動させる力に変換される。この結果、線状部518が回動軸513を押し返す力より、バネ部材514のねじりバネの復元力が大きい場合には、回動軸513はウエハWにより押され、軸受け孔517にガイドされながら、バネ部材514の線状部518から受ける付勢力に抗して外側へ向けて移動していく。   If the pressing member 101 is continuously lowered in this state, the upright portion 511 cannot move toward the inside of the rotating plate 2, so that the force of the spring member 514 acting in the direction of tilting the upright portion 511 is rotated in the bearing hole 517. It is converted into a force for moving the moving shaft 513. As a result, when the restoring force of the torsion spring of the spring member 514 is greater than the force with which the linear portion 518 pushes back the rotating shaft 513, the rotating shaft 513 is pressed by the wafer W and guided by the bearing hole 517. Then, the spring member 514 moves outward against the urging force received from the linear portion 518 of the spring member 514.

しかる後、押圧部材101が被押圧部材515の下方位置まで退避して、その押圧状態を解除すると、バネ部材514の復元力と当該バネ部材514mの線状部518が回動軸514を押し返す力とがバランスする位置にて回動軸514の移動が停止する(図13(a))。本例のバネ部材514は、起立部511がほぼ垂直方向に立ち上がる位置にてこれらの力がバランスするように調節されている。この結果、基板保持部である回転板2の可動部材51の数を減らすことができた上、水平姿勢でウエハWに加わるストレスを抑制しつつ保持することができる。保持されたウエハWは、回転板2と共に回転させながら、ウエハWの下面(裏面)へ向けて吐出孔731から洗浄液を吐出することにより洗浄が行われる。   Thereafter, when the pressing member 101 is retracted to a position below the pressed member 515 and the pressed state is released, the restoring force of the spring member 514 and the force by which the linear portion 518 of the spring member 514m pushes the rotating shaft 514 back. The movement of the rotary shaft 514 stops at a position where the balance is established (FIG. 13A). The spring member 514 of this example is adjusted so that these forces are balanced at a position where the upright portion 511 rises in a substantially vertical direction. As a result, it is possible to reduce the number of movable members 51 of the rotating plate 2 serving as a substrate holding portion and to hold the wafer W while suppressing the stress applied to the wafer W in a horizontal posture. The held wafer W is cleaned by discharging cleaning liquid from the discharge holes 731 toward the lower surface (back surface) of the wafer W while rotating together with the rotating plate 2.

以上、第1、第2の実施の形態に係る洗浄装置1、1aを例に挙げて、回動軸513が水平方向に移動可能な可動部材51及び規制部52(規制部材)を利用してウエハWを保持する発明の実施の形態を説明してきたが、可動部材51の起立部511を径方向外側(または内側)へと倒す手法は、バネ部材514を用いる場合に限定されない。第1の実施の形態に係る洗浄装置1を例にとると、被押圧部515の下面と溝部26内の回転板2の上面とに各々同極の磁石を設けてもよい。これらの磁石を互いに反発させることにより、被押圧部515が支持板3によって押下されていない状態で可動部材51がバネ部材514周りに回転し、起立部511を回転板2の径方向外側へ向けて倒すことができる。
また例えば起立部511の上端部に、被押圧部515とは反対の方向に負荷を加えるカウンターウェイトを設け、当該カウンターウェイトの作用により可動部材51をバネ部材514周りに回転させて起立部511を回転板2の径方向外側へ向けて倒してもよい。
As described above, the cleaning apparatuses 1 and 1a according to the first and second embodiments are taken as an example, and the movable member 51 and the regulating portion 52 (regulating member) in which the rotation shaft 513 can move in the horizontal direction are used. Although the embodiment of the invention for holding the wafer W has been described, the method of tilting the standing portion 511 of the movable member 51 outward (or inward) in the radial direction is not limited to the case where the spring member 514 is used. Taking the cleaning apparatus 1 according to the first embodiment as an example, magnets having the same polarity may be provided on the lower surface of the pressed portion 515 and the upper surface of the rotating plate 2 in the groove portion 26. By repelling these magnets, the movable member 51 rotates around the spring member 514 in a state where the pressed portion 515 is not pressed down by the support plate 3, and the upright portion 511 is directed radially outward of the rotating plate 2. Can be defeated.
Further, for example, a counterweight that applies a load in a direction opposite to the pressed portion 515 is provided at the upper end portion of the standing portion 511, and the movable member 51 is rotated around the spring member 514 by the action of the counterweight, so that the standing portion 511 is moved. The rotation plate 2 may be tilted toward the outside in the radial direction.

そして図1に示した洗浄装置1においては下面用ノズル73及び上面用ノズル74を用いてウエハWの上下両面に洗浄液を供給可能な構成を示したが、ウエハWの下面側だけまたは上面側だけに洗浄液を供給して洗浄処理を行ってもよいことは勿論である。
また本発明の洗浄装置を用いて処理可能な被処理基板はウエハWなどの円形基板に限定されるものではなく、FPD基板などの角型基板であってもよい。この場合において角型基板の径方向とは、角型基板の対向する2辺と直交する方向と定義し、可動部材51の起立部511は例えば当該角型基板の1辺と直交する方向へ向けて外側へ倒れることにより、溝部26から被押圧部515を飛び出させる構成とする場合などが考えられる。
In the cleaning apparatus 1 shown in FIG. 1, the cleaning liquid can be supplied to both the upper and lower surfaces of the wafer W using the lower surface nozzle 73 and the upper surface nozzle 74, but only the lower surface side or the upper surface side of the wafer W is shown. Needless to say, the cleaning process may be performed by supplying a cleaning liquid.
Further, the substrate to be processed using the cleaning apparatus of the present invention is not limited to a circular substrate such as a wafer W, and may be a square substrate such as an FPD substrate. In this case, the radial direction of the rectangular substrate is defined as a direction orthogonal to two opposing sides of the rectangular substrate, and the upright portion 511 of the movable member 51 is directed, for example, in a direction orthogonal to one side of the rectangular substrate. For example, a case where the pressed portion 515 is protruded from the groove portion 26 by falling outward is considered.

これらに加えて規制部52は図1〜図3を用いて説明したように回転板2に設ける場合に限定されるものではなく、支持板3に設けてもよい。また回転板2または支持板3の何れか一方に複数個の規制部52を設ける場合だけではなく、回転板2、支持板3の双方に規制部52を設け、これら規制部52と可動部材51とを協働させてウエハWを規制し、保持してもよい。また可動部材51の設置個数について、上述の各洗浄装置1、1aでは装置構成を簡素化する観点などから可動部材51を1つだけ備えた例について説明したが、すべてを可動部材51で構成してウエハWを保持するのでなければ、可動部材51は複数備えられてもよい。   In addition to these, the restricting portion 52 is not limited to the case where it is provided on the rotating plate 2 as described with reference to FIGS. 1 to 3, and may be provided on the support plate 3. Further, not only when a plurality of restricting portions 52 are provided on either the rotating plate 2 or the support plate 3, restricting portions 52 are provided on both the rotating plate 2 and the supporting plate 3, and these restricting portions 52 and the movable member 51 are provided. The wafer W may be regulated and held in cooperation. In addition, with regard to the number of movable members 51 installed, the above-described cleaning apparatuses 1 and 1a have been described with respect to an example in which only one movable member 51 is provided from the viewpoint of simplifying the apparatus configuration. If the wafer W is not held, a plurality of movable members 51 may be provided.

そして可動部材作動機構は、上端部(起立部511)及び下端部(被押圧部515)を備えた可動部材51の下端部を押圧することにより可動部材51を回動させる図1に示す支持板3や図11に示す押圧部材101にて構成する場合に限定されない。例えば回動軸513から上方に伸びる起立部511のみを備える可動部材51に、回動軸513を回動させるモーターを設けて可動部材作動機構としてもよい。   The movable member actuating mechanism rotates the movable member 51 by pressing the lower end portion of the movable member 51 having the upper end portion (standing portion 511) and the lower end portion (pressed portion 515), as shown in FIG. 3 and the pressing member 101 shown in FIG. For example, the movable member 51 including only the upright portion 511 extending upward from the rotation shaft 513 may be provided with a motor for rotating the rotation shaft 513 to serve as the movable member operating mechanism.

この他、本発明を適用可能なプロセスは、既述の実施の形態中に示した洗浄装置1の例に限られるものではない。例えばウエハWの支持板3(及び回転板2)に支持されたウエハWを回転させながら当該ウエハWの下面にエッチング液を供給し、ウエハWの下面側に形成された不要な膜を除去するエッチング装置である液処理装置にも本発明は適用することができる。更には、ウエハWの上面側にレジスト膜を形成するためのレジスト液や露光後のレジスト膜を現像するための現像液などを塗布する塗布装置である液処理装置に本発明の可動部材51並びに規制部材52を適用してもよい。これらに加えて本発明は、液処理装置へ適用する場合に限定されるものではない。例えば、上面が液体により濡れたウエハWを基板保持部にて保持し、当該ウエハWを鉛直軸周りに回転させてスピン乾燥を行う処理装置にも適用することが可能である。   In addition, the process to which the present invention can be applied is not limited to the example of the cleaning apparatus 1 shown in the above-described embodiment. For example, while rotating the wafer W supported by the support plate 3 (and the rotating plate 2) of the wafer W, an etching solution is supplied to the lower surface of the wafer W, and an unnecessary film formed on the lower surface side of the wafer W is removed. The present invention can also be applied to a liquid processing apparatus that is an etching apparatus. Furthermore, the movable member 51 of the present invention is applied to a liquid processing apparatus which is a coating apparatus for applying a resist solution for forming a resist film on the upper surface side of the wafer W or a developing solution for developing the resist film after exposure. The regulating member 52 may be applied. In addition to these, the present invention is not limited to application to a liquid processing apparatus. For example, the present invention can be applied to a processing apparatus in which a wafer W whose upper surface is wetted by a liquid is held by a substrate holding unit and spin drying is performed by rotating the wafer W around a vertical axis.

W ウエハ
1 洗浄装置
2 回転板
25 回転軸
26 溝部
3 支持板
31 突起部
35 連結シャフト
51 可動部材
511 起立部
513 回動軸
514 バネ部材
515 被押圧部
516 軸受け部
517 軸受け孔
52 規制部
61 回転モーター
62 昇降モーター
73 下面用ノズル
74 上面用ノズル
8 制御部
W Wafer 1 Cleaning device 2 Rotating plate 25 Rotating shaft 26 Groove portion 3 Support plate 31 Protruding portion 35 Connecting shaft 51 Moving member 511 Standing portion 513 Rotating shaft 514 Spring member 515 Pressed portion 516 Bearing portion 517 Bearing hole 52 Restricting portion 61 Rotation Motor 62 Lifting motor 73 Lower surface nozzle 74 Upper surface nozzle 8 Controller

Claims (11)

回転する被処理基板を処理する処理装置において、
被処理基板を保持するための基板保持部と、
この基板保持部を鉛直軸周りに回転させる回転駆動部と、
前記基板保持部に固定して設けられ、被処理基板の側周面を規制する規制部材と、
前記基板保持部に設けられ、水平方向の回動軸周りに回動させて、当該被処理基板を前記規制部材側に押し付けて保持する可動部材と、
前記回動軸を保持すると共に、当該回動軸を被処理基板の中央部寄りの位置とこの位置から当該中央部とは反対側に離れた位置との間で水平方向にガイドするためのガイド部と、
前記回動軸を前記被処理基板の中央部寄りの位置側に付勢するための付勢機構と、
前記可動部材を回動させる可動部材作動機構と、を備え、
前記回動軸は、被処理基板が基板保持部に保持されるときに、前記付勢機構の付勢力に抗してガイド部に沿って移動することができることを特徴とする処理装置。
In a processing apparatus for processing a substrate to be rotated,
A substrate holder for holding the substrate to be processed;
A rotation drive unit that rotates the substrate holding unit around a vertical axis;
A regulating member that is fixed to the substrate holding unit and regulates a side peripheral surface of the substrate to be processed;
A movable member that is provided in the substrate holding portion, rotates around a horizontal rotation axis, and holds the substrate to be processed against the regulating member;
A guide for holding the pivot shaft and guiding the pivot shaft in a horizontal direction between a position near the center of the substrate to be processed and a position away from the position on the opposite side to the center. And
An urging mechanism for urging the rotating shaft toward a position closer to the center of the substrate to be processed;
A movable member operating mechanism for rotating the movable member,
The processing apparatus according to claim 1, wherein when the substrate to be processed is held by the substrate holding portion, the rotation shaft can move along the guide portion against the urging force of the urging mechanism.
前記可動部材は、回動して被処理基板の側周面に側方から接近して当該被処理基板を前記規制部材側に押し付ける上端部と、下端部とを有し、前記可動部材作動機構は、前記可動部材の下端部を押圧することにより当該可動部材を回動させることを特徴とする請求項1に記載の処理装置。   The movable member has an upper end portion and a lower end portion that rotate to approach the side peripheral surface of the substrate to be processed from the side and press the substrate to be processed toward the regulating member, and the movable member operating mechanism The processing apparatus according to claim 1, wherein the movable member is rotated by pressing a lower end portion of the movable member. 前記基板保持部は、上部回転板と下部回転板とに上下に分割され、
前記上部回転板は、前記下部回転板に載置される位置と、当該下部回転板から浮上した位置との間で前記上部回転板を昇降させるための昇降機構を備え、
前記下部回転板には前記可動部材が前記回動軸周りに回動して被処理基板の側周面を前記規制部材に押し付けたときに、前記可動部材の下端部が収納される溝部が形成され、
前記上部回転板は、前記下部回転板に載置されるときに、前記溝部から出ている前記可動部材の下端部を押圧してこの可動部材を回動させ、当該可動部材の上端部により被処理基板を前記規制部材側に押し付けて保持させる前記可動部材作動機構であることを特徴とする請求項2に記載の処理装置。
The substrate holding part is divided into an upper rotating plate and a lower rotating plate in the vertical direction,
The upper rotating plate includes an elevating mechanism for raising and lowering the upper rotating plate between a position placed on the lower rotating plate and a position levitated from the lower rotating plate,
The lower rotating plate is formed with a groove portion in which the lower end portion of the movable member is accommodated when the movable member rotates around the rotation axis and presses the side peripheral surface of the substrate to be processed against the regulating member. And
When the upper rotating plate is placed on the lower rotating plate, the upper rotating plate presses the lower end portion of the movable member protruding from the groove to rotate the movable member, and the upper rotating plate is covered by the upper end portion of the movable member. The processing apparatus according to claim 2, wherein the processing member is a movable member operating mechanism that presses and holds a processing substrate against the regulating member side.
前記上部回転板の上面には、被処理基板を下面側から支持するための突起部が設けられ、上部回転板は、この突起部上に被処理基板を載置した状態で昇降し、前記規制部材及び可動部材に被処理基板を受け渡すことを特徴とする請求項3に記載の処理装置。   A protrusion for supporting the substrate to be processed from the lower surface side is provided on the upper surface of the upper rotating plate, and the upper rotating plate moves up and down with the substrate to be processed placed on the protrusion, and the regulation The processing apparatus according to claim 3, wherein the substrate to be processed is delivered to the member and the movable member. 前記上部回転板の底面に設けられ、下方側へ向けて突出する突出部材と、前記下部回転板に設けられ、当該突出部材を挿入するための貫通穴とを備え、前記昇降機構は、当該貫通穴に挿入された突出部材を下部回転板の下面側から押し上げることにより、前記上部回転板を下部回転板から浮上した位置まで上昇させることを特徴とする請求項3または4に記載の処理装置。   A projecting member provided on a bottom surface of the upper rotating plate and projecting downward; and a through hole provided in the lower rotating plate for inserting the projecting member; 5. The processing apparatus according to claim 3, wherein the upper rotating plate is raised to a position where it floats from the lower rotating plate by pushing up the protruding member inserted into the hole from the lower surface side of the lower rotating plate. 前記下部回転板には、当該下部回転板の上面に載置された上部回転板との間に入り込んだ処理液を集めて排出するための排出孔を備えた排出溝が設けられていることを特徴とする請求項3ないし5のいずれか一つに記載の処理装置。   The lower rotating plate is provided with a discharge groove having a discharge hole for collecting and discharging the processing liquid that has entered between the upper rotating plate placed on the upper surface of the lower rotating plate. 6. The processing apparatus according to claim 3, wherein the processing apparatus is characterized in that: 前記排出溝は、下部回転板の上面に、周方向に沿って設けられていることを特徴とする請求項6に記載の処理装置。   The processing apparatus according to claim 6, wherein the discharge groove is provided on the upper surface of the lower rotating plate along the circumferential direction. 前記可動部材は、回動して被処理基板の側周面に側方から接近して当該被処理基板を前記規制部材側に押し付ける上端部と、下端部と、前記上端部を被処理基板の側周面に押し付ける位置へ向けて付勢する第2の付勢機構とを有し、
前記可動部材作動機構は、前記第2の付勢機構の付勢力に抗して前記可動部材の下端部を押圧し、前記上端部を被処理基板の側周面に押し付ける位置から退避させることを特徴とする請求項1に記載の処理装置。
The movable member rotates to approach the side peripheral surface of the substrate to be processed from the side and presses the substrate to be processed toward the regulating member, a lower end portion, and the upper end portion of the substrate to be processed. A second urging mechanism that urges toward a position pressed against the side peripheral surface,
The movable member actuating mechanism presses the lower end portion of the movable member against the urging force of the second urging mechanism, and retracts the upper end portion from a position to press against the side peripheral surface of the substrate to be processed. The processing apparatus according to claim 1, characterized in that:
前記可動部材は導電性の部材を含み、この導電性の部材は当該可動部材に帯電した状態で規制された被処理基板を除電するための接地回路の一部を構成していることを特徴とする請求項1ないし8のいずれか一つに記載の液処理装置。   The movable member includes a conductive member, and the conductive member constitutes a part of a ground circuit for removing electricity from a substrate to be processed that is regulated while the movable member is charged. The liquid processing apparatus as described in any one of Claim 1 thru | or 8. 前記基板保持部は、下部回転板と、昇降自在に構成されると共に、この下部回転板上に載置される上部回転板とに上下に分割され、これら下部回転板の上面及び上部回転板の下面には、上部回転板が下部回転板上に載置されたときに互いに接触する領域に導電性の部材が設けられ、前記可動部材と導通して接地回路を構成することを特徴とする請求項9に記載の液処理装置。   The substrate holding part is configured to be movable up and down, and is divided into an upper rotating plate placed on the lower rotating plate, and an upper surface of the lower rotating plate and an upper rotating plate. A conductive member is provided on a lower surface of a region where the upper rotating plate is brought into contact with the lower rotating plate when the upper rotating plate is placed on the lower rotating plate, and is electrically connected to the movable member to form a ground circuit. Item 10. The liquid processing apparatus according to Item 9. 回転する被処理基板を処理する処理方法において、
水平方向の回動軸周りに回動自在に設けられた可動部材を回動させる可動部材作動工程と、
基板保持部に固定して設けられた規制部材と、前記回動部材作動工程にて回動した可動部材とにより、被処理基板の側周面を保持する基板保持工程と、
前記基板保持部にて被処理基板を保持するときに、被処理基板の中央部寄りの位置に向けて付勢されている前記回動軸が、水平方向に形成されているガイド部に沿って移動することができる軸移動工程と、を含むことを特徴とする処理方法。
In a processing method for processing a substrate to be rotated,
A movable member actuating step of rotating a movable member provided to be rotatable around a horizontal rotation axis;
A substrate holding step for holding a side peripheral surface of the substrate to be processed by a regulating member fixed to the substrate holding portion and a movable member rotated in the rotating member operating step;
When the substrate holding unit holds the substrate to be processed, the rotation shaft biased toward the position near the center of the substrate to be processed is along the guide portion formed in the horizontal direction. A processing method comprising: an axis moving step capable of moving.
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