JPS59170273A - Plasma etching apparatus - Google Patents

Plasma etching apparatus

Info

Publication number
JPS59170273A
JPS59170273A JP4255283A JP4255283A JPS59170273A JP S59170273 A JPS59170273 A JP S59170273A JP 4255283 A JP4255283 A JP 4255283A JP 4255283 A JP4255283 A JP 4255283A JP S59170273 A JPS59170273 A JP S59170273A
Authority
JP
Japan
Prior art keywords
chamber
plasma etching
substrate
plasma
etching apparatus
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.)
Pending
Application number
JP4255283A
Other languages
Japanese (ja)
Inventor
Yasuo Narutomi
成富 康夫
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP4255283A priority Critical patent/JPS59170273A/en
Publication of JPS59170273A publication Critical patent/JPS59170273A/en
Pending legal-status Critical Current

Links

Landscapes

  • ing And Chemical Polishing (AREA)
  • Drying Of Semiconductors (AREA)

Abstract

PURPOSE:To improve the etching efficiency by cooling a quartz chamber with a cooling means so as to increase the number of active atoms reacting with a substrate. CONSTITUTION:When a gas is converted into plasma in a quartz chamber 1 to etch a substrate 8, the chamber 1 is covered with a cover 10 while leaving a gap, and a gas is passed through the gap to cool the chamber 1. Since the chamber 1 is cooled with the said cooling means, the reaction of the chamber 1 with active atoms is inhibited, so the number of active atoms reacting with the substrate 8 is increased to improve the etching efficiency.

Description

【発明の詳細な説明】 本発明は石英を材質としたチャンバー内でガスをプラズ
マ化し、半導体生産における薄膜のエツチングを行うプ
ラズマエツチング装置に関するものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a plasma etching apparatus for etching thin films in semiconductor production by turning gas into plasma in a chamber made of quartz.

従来、この種のプラズマエツチング装置は第1図のよう
な構造を有している。プラズマ状態をつくり出すチャン
バー1は石英ケ材質とし7てお9、内部は排気口4がら
真空ポンプによって排気されているチャンバー1周辺部
電極2がベルト状に固定され、ケーブル3によp高周波
電力が印加されている。又内部電極7は穴のあいた筒で
、ベースプレート6に固定されており、電気的にアース
電位となっている。内部電極7の中心にはテーブル9が
設置されており、その表面には基板8を装着するように
なっている。チャンバー1の上部に設置されたカスノズ
ル5から導入された反応カスは、外部電極2と内部電極
70間に印加された高周波電力によって励起し、外部電
極2と内部電極7の間でプラズマ化することになる。そ
してこのプラズマ中に存在する活性原子が内部電極7を
通って拡散し、基板8と反応を起すのである。
Conventionally, this type of plasma etching apparatus has a structure as shown in FIG. The chamber 1 that creates the plasma state is made of quartz material 7 and 9, and the inside is evacuated by a vacuum pump through an exhaust port 4.The peripheral electrode 2 of the chamber 1 is fixed in the form of a belt, and the high-frequency power is supplied through a cable 3. is being applied. Further, the internal electrode 7 is a cylinder with a hole, and is fixed to the base plate 6, and is electrically at ground potential. A table 9 is installed at the center of the internal electrode 7, and a substrate 8 is mounted on the surface of the table 9. The reaction scum introduced from the scum nozzle 5 installed at the top of the chamber 1 is excited by the high frequency power applied between the external electrode 2 and the internal electrode 70, and is turned into plasma between the external electrode 2 and the internal electrode 7. become. The active atoms present in this plasma diffuse through the internal electrode 7 and react with the substrate 8.

しかし、従来この種のプラズマエツチング装置では、基
板8に対する汚染、電気的絶縁及び真空維持を考慮して
、チャンバー1が石英でつくられている為、活性原子が
チャンバー1とも反応してしまう。さらに悪いことには
チャンバー1がプラズマ中にさらされている為に電子や
、イオンがチャンバーと衝突し、そのエネルキーでチャ
ンバー1の温度が100℃以上咬で上昇することによp
1活性原子との反応は著しく増大してしまう。したがっ
てプラズマ中で発生した活性原子の多くはチャンバー1
との反応に費いやされ基板8と反応する活性原子の数を
減少させてしまう。こねがこの棟のプラズマエツチング
装置の基板8に対する反応速ルーを下げる原因となって
おり、従ってエツチング効率が低下し、生産性が低いと
いう欠点があった。
However, in conventional plasma etching apparatuses of this type, the chamber 1 is made of quartz in consideration of contamination of the substrate 8, electrical insulation, and vacuum maintenance, so that active atoms also react with the chamber 1. To make matters worse, since chamber 1 is exposed to plasma, electrons and ions collide with the chamber, and their energy causes the temperature of chamber 1 to rise by more than 100 degrees Celsius.
The reaction with one active atom increases significantly. Therefore, most of the active atoms generated in the plasma are in the chamber 1.
This reduces the number of active atoms that are used for reaction with the substrate 8 and reacts with the substrate 8. The kneading caused a reduction in the reaction rate of the plasma etching apparatus in this building to the substrate 8, resulting in a reduction in etching efficiency and low productivity.

本発明の目的は、この上記のような欠点のないプラズマ
エツチング装置を提供することにある。
The object of the present invention is to provide a plasma etching apparatus which does not have the above-mentioned drawbacks.

本発明の特徴は石英を材質としたチャンバーを持ったプ
ラズマエツチングs−hにおいて、そのチャンバーを冷
却する手段金有するところにある。
A feature of the present invention is that a plasma etching system having a chamber made of quartz has a means for cooling the chamber.

その実鉋は、例え、はチャンバーをカバーで1冗いその
曲に空気又は窒累蓼の冷却流体を流すことのできる構造
を待つ体で達成される。
The actual plane is achieved, for example, by covering the chamber with a structure that allows air or nitrogen cooling fluid to flow through its curves.

本発明によれば、基板と反応する活性原子を増すことに
より、反応速度を増すことができ、生産性の旨いプラズ
マエツチング装で、が実層できる。
According to the present invention, by increasing the number of active atoms that react with the substrate, the reaction rate can be increased and a highly productive plasma etching system can be realized.

次に本発明を第2図(a)、 (b)に示す実施例で説
明する。チャンバー1は周囲をチャンバー1とある間隙
を持ったカバーlOで覆われている。カッ〈−10は周
囲VC復数個の冷却ノズル11全持っており、それぞれ
外部よシ空気又は窒素が冷却ノズル11よりチャンバー
1に向って吹き出すようになっている。吹き出された空
気又は窒素はチャンバー1の熱を奪いながら上昇[7、
力・(−]0上部より放出する。・便用カスは低温N2
が効果的である。
Next, the present invention will be explained with reference to the embodiment shown in FIGS. 2(a) and 2(b). The chamber 1 is surrounded by a cover lO with a certain gap between the chamber 1 and the chamber 1. The chamber 10 has several cooling nozzles 11 around the VC, each of which allows external air or nitrogen to be blown out from the cooling nozzles 11 toward the chamber 1. The blown air or nitrogen rises while taking away the heat from chamber 1 [7,
Force・(-]0 Released from the top.・Fecal matter is low temperature N2
is effective.

以上の構造及び方法によって、チャンバーと、活性原子
との反応を抑えることが可能となりプラズマ中で発生し
た活性原子を有効に利用できることになる。又同時にチ
ャンバーの消耗も抑えることが可能となるので、生産性
が高く、経済的なプラズマエッチ装置を供給することか
でキル。
With the above structure and method, it is possible to suppress the reaction between the chamber and the active atoms, and the active atoms generated in the plasma can be effectively utilized. At the same time, it is also possible to suppress chamber wear and tear, making it possible to achieve high productivity by supplying economical plasma etching equipment.

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

第1図は従来のプラズマ、エツチング装置k+、を示す
断面図、第2図(a)及び(b)幻本発明によるプラズ
マエツチング+=hを示す平面図及び断面図である。 ン欠おし1においてl・・・・・・チャンバー、2・・
・・・・外部箱枠、3・・・・・・ケーブル、4・・・
・・・排気口、5・・・・・・カスノズル、6・旧・・
ベースプレート、7・・・・・・内部電極、8・・・・
・・基板、9・・・・・・テーブル、1o・・・・・・
カバー、】1・・・・・・冷却ノズルである。
FIG. 1 is a sectional view showing a conventional plasma etching apparatus k+, and FIGS. 2(a) and 2(b) are a plan view and a sectional view showing a plasma etching +=h according to the present invention. In the hole 1... chamber, 2...
...External box frame, 3...Cable, 4...
...Exhaust port, 5...Cass nozzle, 6. Old...
Base plate, 7... Internal electrode, 8...
...Substrate, 9...Table, 1o...
Cover, ]1... Cooling nozzle.

Claims (1)

【特許請求の範囲】[Claims] 石英を材質とし、たチャンバーを持ったプラズマエツチ
ング装置において、そのチャンバーを冷却する手段を有
することを特徴とするプラズマエツチング装置。
1. A plasma etching apparatus having a chamber made of quartz, characterized in that the plasma etching apparatus has a means for cooling the chamber.
JP4255283A 1983-03-15 1983-03-15 Plasma etching apparatus Pending JPS59170273A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4255283A JPS59170273A (en) 1983-03-15 1983-03-15 Plasma etching apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4255283A JPS59170273A (en) 1983-03-15 1983-03-15 Plasma etching apparatus

Publications (1)

Publication Number Publication Date
JPS59170273A true JPS59170273A (en) 1984-09-26

Family

ID=12639214

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4255283A Pending JPS59170273A (en) 1983-03-15 1983-03-15 Plasma etching apparatus

Country Status (1)

Country Link
JP (1) JPS59170273A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5570010A (en) * 1992-05-20 1996-10-29 The Furukawa Electric Co., Ltd. Method and apparatus for identifying objects using compound signal and a detector employing an electrical static coupling technique
WO2000008229A1 (en) * 1998-08-03 2000-02-17 Tokyo Electron Limited Esrf chamber cooling system and process

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5570010A (en) * 1992-05-20 1996-10-29 The Furukawa Electric Co., Ltd. Method and apparatus for identifying objects using compound signal and a detector employing an electrical static coupling technique
WO2000008229A1 (en) * 1998-08-03 2000-02-17 Tokyo Electron Limited Esrf chamber cooling system and process
US6385977B1 (en) 1998-08-03 2002-05-14 Tokyo Electron Limited ESRF chamber cooling system and process

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