JPH07183280A - Plasma treatment device - Google Patents

Plasma treatment device

Info

Publication number
JPH07183280A
JPH07183280A JP34738693A JP34738693A JPH07183280A JP H07183280 A JPH07183280 A JP H07183280A JP 34738693 A JP34738693 A JP 34738693A JP 34738693 A JP34738693 A JP 34738693A JP H07183280 A JPH07183280 A JP H07183280A
Authority
JP
Japan
Prior art keywords
plasma
semiconductor wafer
processed
processing
treated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP34738693A
Other languages
Japanese (ja)
Other versions
JP3118497B2 (en
Inventor
Yoichi Kurono
洋一 黒野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokyo Electron Ltd
Tokyo Electron Yamanashi Ltd
Original Assignee
Tokyo Electron Ltd
Tokyo Electron Yamanashi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tokyo Electron Ltd, Tokyo Electron Yamanashi Ltd filed Critical Tokyo Electron Ltd
Priority to JP34738693A priority Critical patent/JP3118497B2/en
Priority to TW083111929A priority patent/TW357404B/en
Priority to US08/363,270 priority patent/US5578164A/en
Priority to KR1019940036495A priority patent/KR100290048B1/en
Publication of JPH07183280A publication Critical patent/JPH07183280A/en
Priority to US08/696,224 priority patent/US5779803A/en
Application granted granted Critical
Publication of JP3118497B2 publication Critical patent/JP3118497B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Drying Of Semiconductors (AREA)
  • Container, Conveyance, Adherence, Positioning, Of Wafer (AREA)

Abstract

PURPOSE:To provide a plasma treatment device to suppress a deposition amount of particles to be deposited on the peripheral part of an element to be treated by suppressing progress of plasma treatment on the peripheral part of the treatment surface of the element to be treated by a covering element. CONSTITUTION:This is a plasma treatment device 1 where an element W to be treated is attracted and held in an electrostatic chuck mechanism arranged inside a treatment chamber 2 by Coulomb force, and plasma is generated inside the treatment chamber 2 so as to treat the element W to be treated, and this plasma treatment device is arranged between the element W to be treated and the sheath part of plasma while being provided with a covering element which covers the peripheral part of the treatment surface of the element W to be treated with non-contact performing no plasma treatment on the peripheral part of the treatment surface of the element W to be treated.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明はプラズマ処理装置に関す
る。
FIELD OF THE INVENTION The present invention relates to a plasma processing apparatus.

【0002】[0002]

【従来の技術】従来から、半導体製造工程において、ガ
スをプラズマ化し、被処理体を処理するプラズマ処理装
置として、例えばプラズマエッチング装置が知られてい
る。このようなプラズマエッチング装置として、例えば
特開昭63−300517号が開示されている。この技
術は、半導体ウエハの直径より大きな直径の静電チャッ
クにより半導体ウエハを保持し、プラズマを生起させ半
導体ウエハをエッチング処理するものであった。
2. Description of the Related Art Conventionally, for example, a plasma etching apparatus is known as a plasma processing apparatus for converting a gas into plasma and processing an object to be processed in a semiconductor manufacturing process. As such a plasma etching apparatus, for example, JP-A-63-300517 is disclosed. In this technique, a semiconductor wafer is held by an electrostatic chuck having a diameter larger than that of the semiconductor wafer, plasma is generated, and the semiconductor wafer is etched.

【0003】[0003]

【発明が解決しようとする課題】しかしながら、半導体
ウエハを吸着保持する静電チャックのウエハ保持面にポ
リミド系の樹脂等を使用した場合、静電チャックのウエ
ハ吸着面の半導体ウエハを保持しない箇所がプラズマに
よりエッチングされてしまうので、静電チャックの寿命
を延命化することができないという問題点があった。ま
た被処理体、例えば半導体ウエハの周縁部は、例えば特
開平1−198026号等にも開示されているように、
半導体ウエハを搬送する際、パーティクルの発生を防止
するために、周辺露光等の処理が施されている。そし
て、この露光等の処理が施された半導体ウエハを前述の
エッチング装置でエッチングする際、半導体ウエハの本
来処理を施したい箇所と共に、露光等の処理でレジスト
膜等が剥離された半導体ウエハの周縁部も同様にエッチ
ング処理されてしまう。そして、この半導体ウエハの周
縁部がエッチング処理されると、半導体ウエハの周縁部
が微細な凹凸形状となり、エッチング処理の後、搬送装
置等で半導体ウエハを搬送する際、半導体ウエハの周縁
部が破損したり損傷するという問題が生じていた。
However, when a polyimide resin or the like is used for the wafer holding surface of the electrostatic chuck for sucking and holding the semiconductor wafer, there is a portion of the electrostatic chuck wafer sucking surface where the semiconductor wafer is not held. Since it is etched by plasma, there is a problem that the life of the electrostatic chuck cannot be extended. Further, the peripheral portion of the object to be processed, for example, the semiconductor wafer, is disclosed in, for example, Japanese Patent Application Laid-Open No. 1-198026,
When a semiconductor wafer is transferred, peripheral exposure or the like is performed to prevent the generation of particles. Then, when the semiconductor wafer that has been subjected to such exposure processing is etched by the above-described etching apparatus, along with the portion of the semiconductor wafer where the original processing is desired to be performed, the periphery of the semiconductor wafer from which the resist film has been peeled off due to the exposure processing The parts are similarly etched. When the peripheral edge of the semiconductor wafer is etched, the peripheral edge of the semiconductor wafer becomes a fine uneven shape, and when the semiconductor wafer is transferred by a transfer device or the like after the etching processing, the peripheral edge of the semiconductor wafer is damaged. There was a problem of damage and damage.

【0004】また、半導体ウエハの周縁部が凸凹形状と
なると搬送等の際、この凸凹形状にパーティクルがトラ
ップされ、次の工程を行なう装置の処理室内に、このト
ラップされたパーティクルが飛散し、半導体ウエハに付
着して歩留りを低下させてしまうという改善点を有して
いた。さらに、プラズマ処理装置が例えばCVD装置で
あれば、半導体ウエハの周縁部に膜が付着してしまうの
で、この膜が、半導体ウエハを搬送する搬送手段等によ
って搬送される際に破損或いは損傷しパーティクルとし
て飛散してしまうという問題が生じていた。
Further, when the peripheral portion of the semiconductor wafer has an uneven shape, particles are trapped in the uneven shape during transportation and the like, and the trapped particles are scattered in the processing chamber of the apparatus for performing the next step. There is an improvement in that it adheres to the wafer and reduces the yield. Further, if the plasma processing apparatus is, for example, a CVD apparatus, a film adheres to the peripheral portion of the semiconductor wafer, and therefore, this film is damaged or damaged when being transferred by a transfer unit or the like for transferring the semiconductor wafer, and particles There was a problem of being scattered as.

【0005】本発明の目的は、覆い体によって被処理体
の処理面の周縁部にプラズマによる処理の進行を抑制
し、被処理体の周縁部の被処理体の周縁部に付着するパ
ーティクルの付着量を抑制することができるプラズマ処
理装置を提供することにある。
An object of the present invention is to prevent particles from adhering to the peripheral edge of the object to be processed on the peripheral edge of the object to be processed by suppressing the progress of the plasma treatment on the peripheral edge of the object to be processed by the cover. It is to provide a plasma processing apparatus capable of suppressing the amount.

【0006】[0006]

【課題を解決するための手段】本発明は、処理室内に配
置された静電チャック機構に被処理体をクーロン力で吸
着保持し、前記処理室内にプラズマを生起して、前記被
処理体を処理するプラズマ処理装置であって、前記被処
理体とプラズマのシース部との間に配置され、前記被処
理体の処理面の周縁部を非接触で覆う覆い体を具備し、
この覆い体によって前記被処理体の処理面の周縁部にプ
ラズマによる処理を施さないことを特徴とする。
According to the present invention, an object to be processed is adsorbed and held by a Coulomb force on an electrostatic chuck mechanism arranged in a processing chamber, plasma is generated in the processing chamber, and the object is treated. A plasma processing apparatus for processing, comprising a cover body which is disposed between the object to be processed and a sheath portion of the plasma and which covers a peripheral portion of a processing surface of the object to be processed in a non-contact manner,
It is characterized in that the peripheral portion of the treated surface of the object to be treated is not treated with plasma by this cover.

【0007】[0007]

【作用】本発明は、被処理体とプラズマのシース部との
間に被処理体の処理面の周縁部を非接触で覆う覆い体を
配置したので、この覆い体によって被処理体の処理面の
周縁部にプラズマによる処理の進行を抑制することがで
き、被処理体の処理面の周縁部の表面を処理が終了して
も、処理前の状態に維持することができる。
According to the present invention, since the cover member which covers the peripheral portion of the processing surface of the object to be processed is provided between the object to be processed and the sheath portion of the plasma in a non-contact manner, the processing surface of the object to be processed is covered by the cover member. It is possible to suppress the progress of the plasma treatment on the peripheral portion of the substrate, and it is possible to maintain the state before the treatment on the surface of the peripheral portion of the treated surface of the object to be treated.

【0008】[0008]

【実施例】以下に、本発明に基づくプラズマ処理装置を
プラズマエッチング装置に適用した一実施例を、添付図
面を参照しながら説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which a plasma processing apparatus according to the present invention is applied to a plasma etching apparatus will be described below with reference to the accompanying drawings.

【0009】まず図1に示すようにプラズマエッチング
装置1は、導電性材料、例えばアルミニウム製の略円筒
形状の気密に構成された処理室2を有している。この処
理室2内の下部には昇降機構、例えばサーボモータ3が
設けられており、サーボモータ3によって上下動自在に
構成された載置台としての下部電極4が前記処理室2の
内部に設けられている。また、この下部電極4の周囲に
は下部電極4の上下動にともなって伸縮自在に構成さ
れ、前記処理室2内部を気密に隔離する材質、例えばス
テンレス鋼等からなるべローズ5が設けられている。
First, as shown in FIG. 1, a plasma etching apparatus 1 has a substantially cylindrical airtight processing chamber 2 made of a conductive material such as aluminum. An elevating mechanism, for example, a servo motor 3 is provided in the lower portion of the processing chamber 2, and a lower electrode 4 as a mounting table configured to be vertically movable by the servo motor 3 is provided inside the processing chamber 2. ing. A bellows 5 made of a material such as stainless steel is provided around the lower electrode 4 so that the bellows 5 can expand and contract as the lower electrode 4 moves up and down and airtightly isolates the inside of the processing chamber 2. There is.

【0010】前記下部電極4には、冷媒、例えばチラー
等を流通循環させるための冷媒収容部、例えば冷却ジャ
ケット6が設けられ、この冷却ジャケット6には、チラ
ーを供給及び排出するための冷媒供給/排出路7が接続
されている。さらに、前記下部電極4には、温調用ヒー
タ8が設けられており、この温調用ヒータ8は、電力供
給リード線9を介して温調用ヒータ8に電力を供給する
ための電力源10に接続され、温調用ヒータ8と前記冷
媒ジャケット6に収容される冷媒とによって前記下部電
極4を所定温度、例えば20℃以下に設定可能に構成さ
れている。
The lower electrode 4 is provided with a coolant containing portion, for example, a cooling jacket 6 for circulating and circulating a coolant, for example, a chiller, and the cooling jacket 6 is provided with a coolant supply for supplying and discharging the chiller. / The discharge path 7 is connected. Further, the lower electrode 4 is provided with a temperature adjustment heater 8, and the temperature adjustment heater 8 is connected to a power source 10 for supplying power to the temperature adjustment heater 8 via a power supply lead wire 9. The lower electrode 4 can be set to a predetermined temperature, for example, 20 ° C. or lower, by the temperature adjusting heater 8 and the refrigerant contained in the refrigerant jacket 6.

【0011】さらに、前記下部電極4は、表面にアルマ
イト処理を施した導電材質、例えばアルミニウム等から
なり、被処理体、例えば半導体ウエハWを載置する面に
前記半導体ウエハWをクーロン力によって吸着保持する
静電チャック機構40が設けられている。この静電チャ
ック機構40は、図2に示すように、2枚の高分子フィ
ルム42,43の間に銅箔等の導電膜41を封入したも
ので、この静電チャック機構40の半導体ウエハWの載
置面は、半導体ウエハWの径より小さな径に構成されて
いる。そして、前記導電膜41は、開閉手段、例えば電
磁スイッチ45を介して直流電源44に接続され、この
直流電源44をONするとともに前記電磁スイッチ45
を閉じることで前記高分子フィルム42,43の表面に
分極による静電気が発生し、そのクーロン力によって前
記半導体ウエハWは、前記高分子フィルム42の半導体
ウエハW載置面側に吸着され保持されるよう構成されて
いる。また、前記下部電極4には、複数、例えば3つの
貫通孔部12が設けられ、この貫通孔部12には、それ
ぞれリフターピン13が設けられ、これらのリフターピ
ン13は接合部材14を介して上下機構、例えばエアー
シリンダー15と接続され、上下動自在に構成されてい
る。なお、前記半導体ウエハWは、前記リフターピン1
3にて支持され、前記エアーシリンダー15が上下動す
ることにより前記静電チャック機構40のウエハ載置面
から着脱するよう構成されている。
Further, the lower electrode 4 is made of a conductive material whose surface is anodized, for example, aluminum, and the semiconductor wafer W is attracted to the surface on which the object to be processed, for example, the semiconductor wafer W is mounted, by the Coulomb force. An electrostatic chuck mechanism 40 for holding is provided. As shown in FIG. 2, this electrostatic chuck mechanism 40 is one in which a conductive film 41 such as a copper foil is enclosed between two polymer films 42 and 43, and the semiconductor wafer W of this electrostatic chuck mechanism 40. The mounting surface is formed to have a diameter smaller than that of the semiconductor wafer W. The conductive film 41 is connected to a DC power source 44 via an opening / closing means, for example, an electromagnetic switch 45. The DC power source 44 is turned ON and the electromagnetic switch 45 is turned on.
Is closed to generate static electricity due to polarization on the surfaces of the polymer films 42 and 43, and the Coulomb force of the static electricity causes the semiconductor wafer W to be adsorbed and held on the semiconductor wafer W mounting surface side of the polymer film 42. Is configured. Further, the lower electrode 4 is provided with a plurality of, for example, three through-hole portions 12, and the through-hole portions 12 are provided with lifter pins 13, respectively, and these lifter pins 13 are connected via a joining member 14. It is connected to an up-and-down mechanism, for example, an air cylinder 15, and is vertically movable. The semiconductor wafer W is the lifter pin 1
The air cylinder 15 is supported by 3 and is moved up and down to be attached to and detached from the wafer mounting surface of the electrostatic chuck mechanism 40.

【0012】また、前記下部電極4には、ブロッキング
コンデンサー30を介して高周波、例えば13.56M
Hz或いは40MHz等の高周波電源31が接続され、
また、前記高周波電源31は、制御器32の指示により
ON/OFFされるよう構成され、この制御器32は、
前記高周波電源31のON時間を積算するよう構成され
ている。また、前記処理室2の下部側部付近には排気管
16を介して排気手段、例えば真空ポンプ17が接続さ
れており、前記処理室2内を所望の減圧雰囲気に真空引
き可能なように構成されている。
Further, a high frequency, for example, 13.56M, is applied to the lower electrode 4 through the blocking capacitor 30.
A high frequency power source 31 such as Hz or 40 MHz is connected,
Further, the high frequency power supply 31 is configured to be turned on / off according to an instruction from the controller 32, and the controller 32 is
It is configured to integrate the ON time of the high frequency power supply 31. In addition, an exhaust means, for example, a vacuum pump 17 is connected near the lower side portion of the processing chamber 2 via an exhaust pipe 16 so that the inside of the processing chamber 2 can be evacuated to a desired reduced pressure atmosphere. Has been done.

【0013】また、前記下部電極4の上部には、前記半
導体ウエハWの処理面の周縁部を非接触で覆う覆い体と
してのリング18が配置されている。このリング18
は、複数例えば4本の高純度アルミナ製のシャフト19
を介して処理室2の外側上部に設けられたエアシリンダ
20に接続され構成されている。
Further, a ring 18 is arranged above the lower electrode 4 as a cover for covering the peripheral portion of the processing surface of the semiconductor wafer W in a non-contact manner. This ring 18
Is a plurality of, for example, four high-purity alumina shafts 19
It is connected to an air cylinder 20 provided on the upper outside of the processing chamber 2 via.

【0014】そして、前記リング18の半導体ウエハW
との対向面側即ち内側部には、半導体ウエハWの処理面
の周縁部にプラズマによるエッチングが進行しないよう
に、廂部22が形成されており、この廂部22の外周に
はテーパー面21が形成されている。さらに、この廂部
22の幅は、半導体ウエハWの外周部、つまりエッジか
ら、0.1〜2.0mmの範囲の所定の領域Aを覆うよ
うに構成されている。つまり、この所定の領域Aは、前
述のように、この装置の処理の前処理として、レジスト
等を周辺露光で剥離した領域である。そして、このリン
グの材質としては、後述する反応ガス種によって選択さ
れるものである。例えば反応ガスとして塩素系のガスを
使用する場合は、塩素系のガスと反応するSi系の素材
例えばSi,SiC等は、使用せず、塩素系のガスと反
応しない材質、例えばセラミックス,石英ガラス,窒化
アルミ等の材質で形成するのが好ましい。また、反応ガ
スとしてフッ素系のガスを使用する場合は、前述のSi
系の素材例えばSi,SiC等で形成するのが好まし
い。
Then, the semiconductor wafer W of the ring 18 is formed.
On the side opposite to, ie, on the inner side, an edge portion 22 is formed so that plasma etching does not proceed to the peripheral edge portion of the processing surface of the semiconductor wafer W, and the tapered surface 21 is formed on the outer periphery of the edge portion 22. Are formed. Further, the width of the ridge 22 is configured to cover a predetermined area A within a range of 0.1 to 2.0 mm from the outer peripheral portion of the semiconductor wafer W, that is, the edge. That is, as described above, the predetermined area A is an area where the resist or the like is peeled off by the peripheral exposure as a pretreatment of the processing of this apparatus. The material of the ring is selected according to the reactive gas species described later. For example, when a chlorine-based gas is used as the reaction gas, a Si-based material that reacts with the chlorine-based gas, such as Si or SiC, is not used, and a material that does not react with the chlorine-based gas, such as ceramics or quartz glass. , Aluminum nitride or the like is preferable. When a fluorine-based gas is used as the reaction gas, the above-mentioned Si
It is preferably formed of a system material such as Si or SiC.

【0015】また、前記リング18の上部には、前記下
部電極4と対向する上部電極24が設けられている。こ
の上部電極24の下面には、材質例えばアモルファスカ
ーボン等からなる導電性を有する板状部材25が設けら
れ、その上部に空隙26を開けて配置されている。この
空隙26には、反応ガス、例えばCHF3 ,CF4等
のガスや不活性ガス、例えばN2 ,Ar等のガスを供
給するためのガス供給管27が接続されており、このガ
ス供給管27から供給されたガスを、前記空隙26内に
設けられた多数の透孔を有する複数のバッフル板28に
よって前記ガスを均等に拡散させ、前記板状部材25に
設けられた複数の透孔29から前記処理室2内に供給す
るよう構成されている。
An upper electrode 24 facing the lower electrode 4 is provided on the ring 18. A conductive plate member 25 made of a material such as amorphous carbon is provided on the lower surface of the upper electrode 24, and a void 26 is formed above the plate member 25. A gas supply pipe 27 for supplying a reaction gas, for example, a gas such as CHF3 or CF4 or an inert gas, for example, a gas such as N 2 or Ar, is connected to the void 26. From this gas supply pipe 27 The supplied gas is evenly diffused by a plurality of baffle plates 28 having a large number of through holes provided in the void 26, and the gas is supplied from a plurality of through holes 29 provided in the plate member 25. It is configured to supply into the processing chamber 2.

【0016】そして、前記上部電極24は、電気的に接
地され、前記下部電極4に高周波電力を高周波電源31
によって印加することにより、それらの電極4,24間
でブラズマを生起するよう構成されている。
The upper electrode 24 is electrically grounded, and high frequency power is supplied to the lower electrode 4 by a high frequency power source 31.
Is applied to generate a plasma between the electrodes 4 and 24.

【0017】次に、以上のように構成されたプラズマエ
ッチング装置1の作用について説明する。
Next, the operation of the plasma etching apparatus 1 configured as described above will be described.

【0018】まず、図1に示すように処理室2内圧力を
真空ポンプ17にて所定圧力、例えば10-3Torr以
下の減圧雰囲気とし、半導体ウエハWをリフターピン1
3にて支持し、エアーシリンダー15によってリフター
ピン13を下動し、下部電極4に設けられた静電チャッ
ク機構40の半導体ウエハW載置面に載置し、直流電源
44をONするとともに、電磁スイッチ45を閉じて、
静電チャック機構40の半導体ウエハW載置面に吸着し
保持する。
First, as shown in FIG. 1, the internal pressure of the processing chamber 2 is reduced by a vacuum pump 17 to a predetermined pressure, for example, a reduced pressure atmosphere of 10 −3 Torr or less, and the semiconductor wafer W is lifted by a lifter pin 1.
3, the lifter pin 13 is moved downward by the air cylinder 15, is placed on the semiconductor wafer W mounting surface of the electrostatic chuck mechanism 40 provided on the lower electrode 4, and the DC power supply 44 is turned ON. Close the electromagnetic switch 45,
The electrostatic chuck mechanism 40 attracts and holds the semiconductor wafer W mounting surface.

【0019】この後、昇降機構3によって下部電極4を
上昇させ、半導体ウエハWの周縁部をリング18と離間
させた所定間隔位置で上昇を停止する。この停止位置
は、図3に示すように、半導体ウエハWの処理面と廂部
22とが接触しない間隔Bであり、この間隔Bは、プラ
ズマ中の活性種が、半導体ウエハWの周縁部に作用しな
い間隔で、半導体ウエハWの処理面から、10mm以下
の所定距離に設定する。
After that, the lower electrode 4 is lifted by the lifting mechanism 3, and the lifting is stopped at a predetermined interval position where the peripheral edge of the semiconductor wafer W is separated from the ring 18. As shown in FIG. 3, this stop position is an interval B at which the processing surface of the semiconductor wafer W and the back portion 22 do not come into contact with each other. It is set to a predetermined distance of 10 mm or less from the processing surface of the semiconductor wafer W at intervals that do not work.

【0020】しかる後、図1に示すように処理室2内を
排気して所定の真空度、例えば数十mTorrに設定し
つつ、ガス供給管27から所定のガスを供給し、制御器
32からの指示信号によって高周波電源31をONし、
下部電極4と上部電極24との間に高周波電力、例えば
200W以上の電力を印加し、プラズマを生起させ半導
体ウエハWをエッチング処理する。
Thereafter, as shown in FIG. 1, the inside of the processing chamber 2 is evacuated and a predetermined vacuum degree, for example, several tens of mTorr is set, and a predetermined gas is supplied from the gas supply pipe 27, and the controller 32 is operated. The high frequency power supply 31 is turned on by the instruction signal of
A high-frequency power, for example, a power of 200 W or more is applied between the lower electrode 4 and the upper electrode 24 to generate plasma to etch the semiconductor wafer W.

【0021】このエッチング処理にて、図3に示すよう
に、上部電極24と下部電極4との間に生起したプラズ
マPのプラズマシース部P1の下部に配置したリング1
8は、プラズマP中の活性種、例えばイオン等で処理さ
れる半導体ウエハWの周縁部をそれらの活性種が作用し
ないように半導体ウエハWの周縁部を非接触で覆ってい
る。このように、リング18と半導体ウエハWの周縁部
とが非接触にされる理由としては、エッチング処理で生
成される反応生成物が半導体ウエハWの周縁部とリング
18との間に付着するのを抑制できる、或いは半導体ウ
エハWがリング18に接触した際、その振動によってリ
ング18に付着した反応生成物が半導体ウエハW上に落
下するのを防止するためである。また、エッチング処理
ではなくて、CVD装置では、膜付けするので、半導体
ウエハWがリング18に接触していると半導体ウエハW
の処理面とリング18の上面に生成される膜がつながっ
て成長する恐れがあり、半導体ウエハWの処理面とリン
グ18が離れる際に、この膜が剥離し、半導体ウエハW
上に落下し付着するのを防止するためである。
In this etching process, as shown in FIG. 3, the ring 1 arranged below the plasma sheath portion P1 of the plasma P generated between the upper electrode 24 and the lower electrode 4.
Reference numeral 8 covers the peripheral edge of the semiconductor wafer W, which is treated with active species in the plasma P, such as ions, in a non-contact manner so that the active species does not act on the peripheral edge. As described above, the reason why the ring 18 and the peripheral edge of the semiconductor wafer W are not in contact with each other is that the reaction product generated by the etching process adheres between the peripheral edge of the semiconductor wafer W and the ring 18. Is to prevent the reaction product attached to the ring 18 from dropping onto the semiconductor wafer W due to the vibration when the semiconductor wafer W contacts the ring 18. In addition, since the film is attached by the CVD apparatus instead of the etching process, when the semiconductor wafer W is in contact with the ring 18,
There is a possibility that a film formed on the processing surface of the semiconductor wafer W and the film formed on the upper surface of the ring 18 may be connected and grow, and when the processing surface of the semiconductor wafer W and the ring 18 are separated from each other, the film peels off and the semiconductor wafer W
This is to prevent it from falling and sticking to it.

【0022】以上のように構成された本実施例の効果に
ついて説明する。
The effects of this embodiment having the above-mentioned structure will be described.

【0023】このように、半導体ウエハWの処理面と廂
部22とが接触しない間隔B、つまり、この間隔Bは、
プラズマ中の活性種が、半導体ウエハWの周縁部に作用
しない間隔で、半導体ウエハWの処理面から、10mm
以下の所定距離に設定して配置され半導体ウエハWの処
理が行なわれるので、半導体ウエハWの処理面の周縁部
にプラズマによる処理の進行を抑制することができ、半
導体ウエハWの処理面の周縁部の表面を処理が終了して
も、処理前の状態に維持することができるので、半導体
ウエハWの周縁部の被処理体の周縁部に付着するパーテ
ィクルの付着量を抑制することができ、被処理体の歩留
りを向上することができる。
As described above, the interval B at which the processing surface of the semiconductor wafer W and the sill 22 are not in contact with each other, that is, the interval B is
10 mm from the processing surface of the semiconductor wafer W at intervals such that the active species in the plasma do not act on the peripheral portion of the semiconductor wafer W.
Since the semiconductor wafer W is arranged and set at the following predetermined distance, the progress of the plasma treatment can be suppressed at the peripheral portion of the processing surface of the semiconductor wafer W, and the peripheral portion of the processing surface of the semiconductor wafer W can be suppressed. Even after the processing of the surface of the part is completed, the state before the processing can be maintained, so that the amount of particles adhering to the peripheral portion of the object to be processed on the peripheral portion of the semiconductor wafer W can be suppressed, The yield of the object to be processed can be improved.

【0024】なお、実施例では、被処理体として半導体
ウエハを用いた場合を説明したが、これに限定されず、
例えばLCD基板でもよく、また、覆い体としてリング
状の形状を用いたが四角でもよく、さらに被処理体の形
状に依存しても良く、被処理体の周縁部を実質的に覆え
るものなら何でもよいことは言うまでもない。また、上
部電極側に高周波電力を印加し、下部電極に、高周波電
力を印加し下部電極を電気的に接地したが、この印加を
逆として等方性エッチング(アノードカップル型)とし
て構成してもよいことは言うまでもない。
In the embodiment, the case where the semiconductor wafer is used as the object to be processed has been described, but the present invention is not limited to this.
For example, an LCD substrate may be used, and a ring-shaped shape is used as the cover, but a square shape may be used, and the shape may depend on the shape of the object to be processed as long as it can substantially cover the peripheral edge of the object to be processed. Not to mention anything. Further, high-frequency power was applied to the upper electrode side, and high-frequency power was applied to the lower electrode to electrically ground the lower electrode. However, the application may be reversed to form isotropic etching (anode couple type). It goes without saying that it is good.

【0025】さらに、実施例では、一例として本発明に
基づくプラズマ処理装置をプラズマエッチング装置に適
用した例を示したが、かかる装置に限定されることな
く、CVD装置、アッシング装置、LCD装置等の処理
の際に反応生成物が発生する装置であればどのような装
置にも適応可能である。
Further, in the embodiment, the example in which the plasma processing apparatus according to the present invention is applied to the plasma etching apparatus is shown as an example, but the present invention is not limited to such an apparatus, and may be a CVD apparatus, an ashing apparatus, an LCD apparatus, or the like. It can be applied to any device as long as it produces a reaction product during processing.

【0026】[0026]

【発明の効果】本発明は、覆い体によって被処理体の処
理面の周縁部にプラズマによる処理の進行を抑制するこ
とができ、被処理体の処理面の周縁部の表面を処理が終
了しても、処理前の状態に維持することができるので、
被処理体の周縁部の被処理体の周縁部に付着するパーテ
ィクルの付着量を抑制することができ、被処理体の歩留
りを向上することができる。
According to the present invention, it is possible to suppress the progress of the plasma treatment on the peripheral portion of the processed surface of the object to be processed by the cover, and the treatment of the peripheral surface of the processed surface of the object is completed. However, since it can be maintained in the state before processing,
The amount of particles adhering to the peripheral edge of the object to be processed can be suppressed, and the yield of the object to be processed can be improved.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明に係る第1の実施例が適用されるプラズ
マエッチング装置の概略的な断面図である。
FIG. 1 is a schematic sectional view of a plasma etching apparatus to which a first embodiment according to the present invention is applied.

【図2】図1の静電チャック機構の部分概略図である。FIG. 2 is a partial schematic view of the electrostatic chuck mechanism of FIG.

【図3】図1の覆い体の作用を説明する部分概略図であ
る。
FIG. 3 is a partial schematic view illustrating the operation of the cover body in FIG.

【符号の説明】[Explanation of symbols]

1 プラズマエッチング装置(プラズマ処理装置) 2 処理室 4 載置台(下部電極) 18 覆い体(リング) 21 テーパー面 22 廂部 24 上部電極 46 エッジ W 被処理体(半導体ウエハ) P プラズマ P1 シース部 DESCRIPTION OF SYMBOLS 1 Plasma etching apparatus (plasma processing apparatus) 2 Processing chamber 4 Mounting table (lower electrode) 18 Cover (ring) 21 Tapered surface 22 Raised part 24 Upper electrode 46 Edge W Object to be processed (semiconductor wafer) P Plasma P1 Sheath part

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 処理室内に配置された静電チャック機構
に被処理体をクーロン力で吸着保持し、前記処理室内に
プラズマを生起して、前記被処理体を処理するプラズマ
処理装置であって、前記被処理体とプラズマのシース部
との間に配置され、前記被処理体の処理面の周縁部を非
接触で覆う覆い体を具備し、この覆い体によって前記被
処理体の処理面の周縁部にプラズマによる処理を施さな
いことを特徴とするプラズマ処理装置。
1. A plasma processing apparatus for processing an object to be processed by attracting and holding the object to be processed by a Coulomb force to an electrostatic chuck mechanism arranged in the processing chamber, generating plasma in the processing chamber, and processing the object. A covering member that is disposed between the object to be processed and the sheath portion of the plasma and covers the peripheral portion of the processing surface of the object to be processed in a non-contact manner. A plasma processing apparatus characterized in that the peripheral portion is not treated with plasma.
【請求項2】 前記プラズマ処理装置はエッチング装置
であることを特徴とする特許請求の範囲第1項記載のプ
ラズマ処理装置。
2. The plasma processing apparatus according to claim 1, wherein the plasma processing apparatus is an etching apparatus.
【請求項3】 前記覆い体で覆う被処理体の処理面の周
縁部は被処理体のエッジから、0.1〜2.0mmの範
囲の所定の領域であることを特徴とする特許請求の範囲
第1項記載又は特許請求の範囲第2項記載のプラズマ処
理装置。
3. The peripheral portion of the processing surface of the object to be processed covered with the cover is a predetermined region within a range of 0.1 to 2.0 mm from the edge of the object to be processed. The plasma processing apparatus according to claim 1 or claim 2.
【請求項4】 前記覆い体は、被処理体の処理面から、
10mm以下の距離に配置され、前記被処理体の処理面
とは非接触であることを特徴とする特許請求の範囲第1
項記載又は特許請求の範囲第2項記載のプラズマ処理装
置。
4. The cover body, from the processing surface of the object to be processed,
It is arranged at a distance of 10 mm or less and is not in contact with the processing surface of the object to be processed.
The plasma processing apparatus according to claim 1 or claim 2.
JP34738693A 1993-12-24 1993-12-24 Plasma processing apparatus and plasma processing method Expired - Fee Related JP3118497B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP34738693A JP3118497B2 (en) 1993-12-24 1993-12-24 Plasma processing apparatus and plasma processing method
TW083111929A TW357404B (en) 1993-12-24 1994-12-20 Apparatus and method for processing of plasma
US08/363,270 US5578164A (en) 1993-12-24 1994-12-23 Plasma processing apparatus and method
KR1019940036495A KR100290048B1 (en) 1993-12-24 1994-12-24 Plasma treatment apparatus and method
US08/696,224 US5779803A (en) 1993-12-24 1996-08-13 Plasma processing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP34738693A JP3118497B2 (en) 1993-12-24 1993-12-24 Plasma processing apparatus and plasma processing method

Publications (2)

Publication Number Publication Date
JPH07183280A true JPH07183280A (en) 1995-07-21
JP3118497B2 JP3118497B2 (en) 2000-12-18

Family

ID=18389881

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JP3118497B2 (en)

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Publication number Priority date Publication date Assignee Title
KR100505903B1 (en) * 1999-12-27 2005-08-05 가부시끼가이샤 히다치 세이사꾸쇼 Plasma-processing apparatus and plasma-processing method using the same
JP2007234939A (en) * 2006-03-02 2007-09-13 Seiko Epson Corp Wafer processing apparatus
US8383000B2 (en) 2009-12-04 2013-02-26 Tokyo Electron Limited Substrate processing apparatus, method for measuring distance between electrodes, and storage medium storing program
CN105047599A (en) * 2011-03-14 2015-11-11 等离子瑟姆有限公司 Method and Apparatus for Plasma Dicing a Semi-conductor Wafer
JP2017063212A (en) * 2011-05-31 2017-03-30 アプライド マテリアルズ インコーポレイテッドApplied Materials,Incorporated Dynamic ion radical sieve and ion radical aperture for inductively coupled plasma (icp) reactor
CN114566450A (en) * 2022-03-02 2022-05-31 珠海市硅酷科技有限公司 Wafer loading device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100505903B1 (en) * 1999-12-27 2005-08-05 가부시끼가이샤 히다치 세이사꾸쇼 Plasma-processing apparatus and plasma-processing method using the same
JP2007234939A (en) * 2006-03-02 2007-09-13 Seiko Epson Corp Wafer processing apparatus
JP4622890B2 (en) * 2006-03-02 2011-02-02 セイコーエプソン株式会社 Wafer processing equipment
US8383000B2 (en) 2009-12-04 2013-02-26 Tokyo Electron Limited Substrate processing apparatus, method for measuring distance between electrodes, and storage medium storing program
CN105047599A (en) * 2011-03-14 2015-11-11 等离子瑟姆有限公司 Method and Apparatus for Plasma Dicing a Semi-conductor Wafer
JP2017063212A (en) * 2011-05-31 2017-03-30 アプライド マテリアルズ インコーポレイテッドApplied Materials,Incorporated Dynamic ion radical sieve and ion radical aperture for inductively coupled plasma (icp) reactor
CN114566450A (en) * 2022-03-02 2022-05-31 珠海市硅酷科技有限公司 Wafer loading device
CN114566450B (en) * 2022-03-02 2022-11-25 珠海市硅酷科技有限公司 Wafer feeding device

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