JPH0349220A - Etching device - Google Patents

Etching device

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Publication number
JPH0349220A
JPH0349220A JP18356189A JP18356189A JPH0349220A JP H0349220 A JPH0349220 A JP H0349220A JP 18356189 A JP18356189 A JP 18356189A JP 18356189 A JP18356189 A JP 18356189A JP H0349220 A JPH0349220 A JP H0349220A
Authority
JP
Japan
Prior art keywords
reaction chamber
reaction
etching
film
reaction product
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
JP18356189A
Other languages
Japanese (ja)
Inventor
Masato Fujino
真人 藤野
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP18356189A priority Critical patent/JPH0349220A/en
Publication of JPH0349220A publication Critical patent/JPH0349220A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To prevent a reaction product from peeling by covering the reaction product, adhered to the wall surface etc., of a reaction chamber, with a film. CONSTITUTION:A subject 103 to be etched is placed in a reaction chamber 201, and a mixed gas, consisting of CCl4, BCl3 and N2, is introduced into the reaction chamber 201. This mixed gas provides ions 211 or radicals 212, and reaction gas 210 and reacts on an Al film 208 to remove this Al film 208. A part of a reaction product 231 discharged from a discharge port 205 adheres to the wall surface etc., inside the reaction chamber 201. Consequently, when the etching subject is removed for every fixed period and a film forming device 106, consisting of depressurized W, is covered with Ti 114 and current is supplied to the device 106 to heat the device 106, Ti film 114 is formed on the whole surface of the product 213, and thereby, peeling of the reaction product can be prevented.

Description

【発明の詳細な説明】 [発明の目的] (産業上の利用分野) 本発明は半導体装置に係るエツチング装置に関する。[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to an etching apparatus for semiconductor devices.

(従来の技術) 半導体素子をエツチングする方法として例えばドライ・
エツチングが用いられるが、このエツチング時に生成し
た反応生成物の一部が排気されずに反応室内の壁面等に
付着し残ることから所定枚数のウェハーを処理すること
に反応室内を人手によって洗浄していた。
(Prior art) For example, dry etching is a method for etching semiconductor elements.
Etching is used, but since some of the reaction products generated during etching are not exhausted and remain on the walls of the reaction chamber, the interior of the reaction chamber must be manually cleaned after processing a predetermined number of wafers. Ta.

以下、第3図、第4図を用いて従来のエツチング装置を
説明する。まず第3図に示すエツチング装置には、反応
室(201)の上面にガス導入口(202)が設けられ
ている。ガス導入口(202)に対向する壁面付近には
平行平板電極(204a)が設けられており、この平行
平板電極(204a)にエツチング対象物(203)と
してウェハーが置かれている。平行平板電極(204a
)と対になる平行平板電極(204b)はガス導入口(
202)の一部として設けられている。
A conventional etching apparatus will be explained below with reference to FIGS. 3 and 4. First, the etching apparatus shown in FIG. 3 is provided with a gas inlet (202) on the upper surface of a reaction chamber (201). A parallel plate electrode (204a) is provided near the wall facing the gas inlet (202), and a wafer is placed on this parallel plate electrode (204a) as an object to be etched (203). Parallel plate electrode (204a
) and the parallel plate electrode (204b) paired with the gas inlet (
202).

又、反応室(201)の下面側には排気口(205)が
設けられている。排気口(205)には真空ポンプ等が
接続されており反応室(201)内を減圧状態にし反応
ガスを反応室内に導入し、エツチング対象物(203)
のエツチングを行なう。次に、このエツチング装置を用
いてエツチングを行なうと、基板のエツチングとともに
反応生成物が生成しこの一部が排気されずに反応室の壁
面等に付着する。これを第4図を用いて説明する。
Further, an exhaust port (205) is provided on the lower surface side of the reaction chamber (201). A vacuum pump or the like is connected to the exhaust port (205) to reduce the pressure in the reaction chamber (201) and introduce a reaction gas into the reaction chamber to remove the etching target (203).
Perform etching. Next, when etching is performed using this etching apparatus, reaction products are generated as the substrate is etched, and some of these products are not evacuated and adhere to the walls of the reaction chamber. This will be explained using FIG. 4.

上記の構成によれば反応室(201)内にエッチング対
象物(203)が設置され反応ガス(例えばハロゲンを
主体としたCCl4.BCl23.Cl3゜及びN2の
混合ガス)がガス導入口(202)から導入される。エ
ツチング対象物(203)は例えばシリコン基板(21
5)上に形成されているシリコン酸化膜(207)上の
A!膜(20g)を対象物とし、このAρ膜(20B)
上にレジストパターン(209)が形成されている。平
行平板電極(図示せず)に電圧を印加することによりC
Cj!4 、B(、g3 、C(12及びN2の混合ガ
スは反応ガス(210) 、イオン(211) 、ある
いはラジカル(212)となりA4膜(208)と反応
して例えばAρC423等の生成物(213)が形成さ
れレジストパターン(209)によりマスクされた領域
を除いて除去される。通常エツチングにより生成した反
応生成物(213)は蒸気圧が高く除去しやすいため排
気口(205)より排出されるが、反応生成物(213
)の一部は排出されずに反応室(201)内の壁面等に
付着する。この反応生成物(213)は反応室(201
)の壁面に非常に薄く付着するがエツチングを行なうご
とに堆積され、ある一定の膜厚になると剥離してエツチ
ング対象物(203)表面を汚染したり、また、汚染さ
れた部分のエツチングが遅くなりエツチングの性能が劣
化する原因となっている。このため、一定期間ごと(例
えば処理ウェハ枚数、あるいは処理時間など)にエツチ
ング装置を停止させて、反応室(201)を分解し反応
室(201)内を大気中にさらして水、及びアルコール
等でウェット洗浄を行い反応室(201)の壁面に付着
した反応生成物(213)を除去することが必要である
。反応室(201)内を洗浄した後、反応室(201)
内を乾燥させ、再度組立てる。
According to the above configuration, the object to be etched (203) is installed in the reaction chamber (201), and the reaction gas (for example, a mixed gas of CCl4.BCl23.Cl3° and N2 mainly containing halogen) is supplied to the gas inlet (202). It is introduced from The object to be etched (203) is, for example, a silicon substrate (21
5) A! on the silicon oxide film (207) formed above! The film (20g) is the object, and this Aρ film (20B)
A resist pattern (209) is formed thereon. C by applying a voltage to parallel plate electrodes (not shown)
Cj! The mixed gas of 4, B(, g3, C(12 and N2) becomes a reactive gas (210), ions (211), or radicals (212) and reacts with the A4 membrane (208) to produce products (213) such as AρC423. ) is formed and removed except for the area masked by the resist pattern (209).Reaction products (213) generated by etching usually have a high vapor pressure and are easy to remove, so they are discharged from the exhaust port (205). is the reaction product (213
) is not discharged and adheres to the walls, etc. inside the reaction chamber (201). This reaction product (213) is transferred to the reaction chamber (201
It adheres very thinly to the wall surface of the etching object (203), but it is deposited each time etching is performed, and when it reaches a certain thickness, it peels off and contaminates the surface of the object to be etched (203), and etching of the contaminated area is slow. This causes the etching performance to deteriorate. For this reason, the etching apparatus is stopped at regular intervals (for example, depending on the number of wafers processed or processing time), and the reaction chamber (201) is disassembled and the inside of the reaction chamber (201) is exposed to the atmosphere to remove water, alcohol, etc. It is necessary to perform wet cleaning to remove the reaction products (213) attached to the walls of the reaction chamber (201). After cleaning the inside of the reaction chamber (201),
Dry inside and reassemble.

しかしながらウェット洗浄を行なうために反応室(21
3)内を大気にふれさせると大気中の水分と反応生成物
(213)とが反応してHCl、HBr。
However, in order to perform wet cleaning, the reaction chamber (21
3) When the inside is exposed to the atmosphere, the moisture in the atmosphere and the reaction product (213) react to form HCl and HBr.

1(F等有害なガスが発生してしまうという問題がある
。洗浄は通常、人手により処理しているため人体に悪影
響を及ぼしてしまう。
1 (There is a problem that harmful gases such as F are generated. Cleaning is usually done manually, which has an adverse effect on the human body.

又、反応室(201)は真空容器であるため、水分に触
れると乾燥させるのに時間がかかり、更にウェット洗浄
は普通、反応室(201)を分解して部品ごとを洗浄し
この後、分解した部品を乾燥させてから再度組立ててい
るため、洗浄を終えて、洗浄前の状態に反応室(201
)を復帰させるまでに時間がかかってしまうという問題
があった。
In addition, since the reaction chamber (201) is a vacuum container, it takes time to dry it if it comes into contact with moisture, and wet cleaning usually involves disassembling the reaction chamber (201) and cleaning each part. Because the parts are dried and reassembled, the reaction chamber (201
) has a problem in that it takes a long time to recover.

(発明が解決しようとする課題) 以上詳述したように従来においては反応室内に反応生成
物が堆積、剥離し半導体基板表面を汚染したりエツチン
グ性能を劣化させるという問題があった。本発明におい
ては抵抗加熱形の薄膜生成装置を設けたことにより反応
生成物上に薄膜を形成することができ反応生成物の剥離
を防ぐことを目的とする。
(Problems to be Solved by the Invention) As detailed above, conventional methods have had the problem that reaction products accumulate and peel off within the reaction chamber, contaminating the surface of the semiconductor substrate and deteriorating the etching performance. The purpose of the present invention is to provide a resistance heating type thin film forming device so that a thin film can be formed on the reaction product and to prevent the reaction product from peeling off.

[発明の構成] (課題を解決するための手段) 本発明は上記目的を達成するために半導体基板を収容す
る反応室と、披エツチング物と反応ガスの反応より前記
反応室内に付着する反応生成物と、前記反応生成物上に
薄膜を形成する抵抗加熱形の薄膜生成装置とを具備した
ことを特徴とするエツチング装置を提供する。
[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention provides a reaction chamber that accommodates a semiconductor substrate, and a reaction product that adheres inside the reaction chamber due to a reaction between an etching material and a reaction gas. The present invention provides an etching apparatus characterized in that it is equipped with a resistive heating type thin film forming apparatus for forming a thin film on the reaction product.

(作 用) 上記構成によれば反応室内に抵抗加熱形の薄膜生成装置
を設けたことにより、エツチング処理により排気されず
に反応室内の壁面に堆積した反応生成物上に薄膜を被覆
することができ、反応生成物の剥離を防ぐことができる
(Function) According to the above configuration, by providing the resistance heating type thin film generation device in the reaction chamber, it is possible to coat the reaction product deposited on the wall surface of the reaction chamber with a thin film without being exhausted by the etching process. It is possible to prevent the reaction product from peeling off.

(実施例) 以下、本発明における実施例を第1図を用いて説明する
。まず、第1図に示すように反応室(101)の上面に
ガス導入口(102)が設けられている。ガス導入口(
102)に対向する壁面付近には平行平板電極(104
a)が設けられており、この平行平板電極(IQ4a)
上にエツチング対象物(103)としてウェハーが置か
れている。平行平板電極(10’4a)と対になる平行
平板電極(104b)はガス導入口(102)の一部と
して設けられている。又、反応室(101)の下面側に
は排気口(105)が設けられている。排気口(105
)には真空ポンプ等の減圧手段に接続されており反応室
(101)内を減圧状態にする。又、反応室(101)
の側面部にはW(タングステン)から成る薄膜生成装置
(ioe)が設けられており、フィラメントとしてTi
(チタン)(114)が被覆されている。次に第1図に
示したエツチング装置を用いてエツチングを行なうとエ
ツチング対象物(103)のエツチングとともに反応生
成物が生成し、この一部が排気されて残りが排気されず
に反応室の壁面等に付着する。この作用を第2図、及び
従来例に示した第4図を用いて説明する。
(Example) Hereinafter, an example of the present invention will be described using FIG. 1. First, as shown in FIG. 1, a gas inlet (102) is provided on the upper surface of a reaction chamber (101). Gas inlet (
Parallel plate electrodes (104) are located near the wall facing the parallel plate electrodes (102).
a) is provided, and this parallel plate electrode (IQ4a)
A wafer is placed on top as an object to be etched (103). A parallel plate electrode (104b) paired with the parallel plate electrode (10'4a) is provided as a part of the gas inlet (102). Further, an exhaust port (105) is provided on the lower surface side of the reaction chamber (101). Exhaust port (105
) is connected to a pressure reducing means such as a vacuum pump to reduce the pressure inside the reaction chamber (101). Also, reaction chamber (101)
A thin film generating device (IOE) made of W (tungsten) is installed on the side surface of the
(Titanium) (114) coated. Next, when etching is performed using the etching apparatus shown in FIG. 1, reaction products are generated as the object to be etched (103) is etched, a part of which is evacuated, and the rest is not evacuated and is deposited on the wall of the reaction chamber. etc. This effect will be explained using FIG. 2 and FIG. 4 shown in the conventional example.

上記の構成によれば反応室(201)内にエツチング対
象物(203)が設置され反応ガスをCCf1i 。
According to the above configuration, the object to be etched (203) is installed in the reaction chamber (201), and the reaction gas is supplied to CCf1i.

BCl2.Cl3.及びN2の混合ガスとしてガス導入
口(図示せず)から反応室(201)内に導入される。
BCl2. Cl3. and N2 are introduced into the reaction chamber (201) from a gas inlet (not shown).

エツチング対象物(203)はシリコン基板(215)
上に形成されているシリコン酸化膜(207)上のAρ
Il! (20g)を対象物とし、このA(膜(208
)上にはレジストパターン(209)が塗布されている
。平行平板電極(図示せず)に電圧を印加することによ
りCCl2 +  BCj!3 *Cl22及びN2の
混合ガスは反応ガス(210) 、イオン(211) 
、或いはラジカル(212)となりAI膜(2011)
と反応して例えばA、jIC43等の反応生成物(21
3)が形成されレジストパターン(209)によりマス
クされた領域を除いてAJ2膜(208)が除去される
。このようにへ!膜(208)をエツチングした後、排
気口(205)より反応生成物(213)が排気される
が、その一部は反応室(201)内の壁面等に付着する
。このため、一定期間ごと(例えば処理ウェハ枚数、あ
るいは処理時間等)にエツチング対象物(1(13)を
取り除いて減圧状態のままW(タングステン)から成る
薄膜生成装置(10B)にTi(チタン)(114)を
被覆させ薄膜生成装置(106)に電流を通し加熱させ
ると、T i (114)が放出され反応室(101)
内の壁面等に堆積している反応生成物(113)上に全
面にT i (114)の薄膜が被覆される。この後、
反応ガスを導入し再びエツチング処理を行なう。
The object to be etched (203) is a silicon substrate (215)
Aρ on the silicon oxide film (207) formed above
Il! (20g) as the object, this A (membrane (208g)
) is coated with a resist pattern (209). By applying a voltage to parallel plate electrodes (not shown), CCl2 + BCj! 3 *The mixed gas of Cl22 and N2 is a reactive gas (210) and ions (211)
, or becomes radical (212) and AI film (2011)
For example, reaction products such as A, jIC43 (21
3) is formed and the AJ2 film (208) is removed except for the area masked by the resist pattern (209). Like this! After etching the film (208), the reaction product (213) is exhausted from the exhaust port (205), but a part of it adheres to the walls, etc. inside the reaction chamber (201). For this reason, the etching object (1 (13)) is removed at regular intervals (for example, depending on the number of wafers to be processed or the processing time, etc.), and Ti (titanium) is applied to the thin film forming device (10B) made of W (tungsten) while the etching target (1 (13)) is being removed under reduced pressure. (114) is coated and the thin film generating device (106) is heated by passing an electric current through it, T i (114) is released and the reaction chamber (101) is heated.
A thin film of T i (114) is coated on the entire surface of the reaction product (113) deposited on the inner wall surface, etc. After this,
A reactive gas is introduced and the etching process is performed again.

従って、反応生成物(113)上を薄膜で被覆すること
により、反応生成物(113)の剥離を防ぐことができ
、エツチング対象物(103)上に反応生成物(113
)が付着し汚染したり、また汚染された部分のエツチン
グが遅くなることを防ぐことができるため、エツチング
性能の劣化を防ぐことができる。
Therefore, by coating the reaction product (113) with a thin film, it is possible to prevent the reaction product (113) from peeling off, and the reaction product (113) can be coated on the etching target (103).
) can be prevented from adhering to the surface and contaminating it, and etching of the contaminated area can be prevented from slowing down, thereby preventing deterioration of etching performance.

又、エツチング対象物(103)を取り除き反応室(1
01)内を減圧状態にしたまま薄膜を形成するだけでよ
いため、反応室(lot)内を大気中にふれさせ、水、
及びアルコール等でウェット洗浄することがないため有
害なガスを発生することによる、洗浄する人に対する悪
影響を及ぼす事なく反応生成物(112)の剥離を防ぐ
ことができる。又、反応室(101)の分解、洗浄、乾
燥、及び組立てをする必要がないため作業時間の短縮化
をはかることができる。
Also, the object to be etched (103) is removed and the reaction chamber (1
01) Since it is only necessary to form a thin film while keeping the interior in a reduced pressure state, the inside of the reaction chamber (lot) is exposed to the atmosphere, water,
Also, since there is no need for wet cleaning with alcohol or the like, the reaction product (112) can be prevented from peeling off without causing harmful effects on the person cleaning due to the generation of harmful gases. Further, since there is no need to disassemble, wash, dry, and assemble the reaction chamber (101), the working time can be shortened.

尚、薄膜生成装置はエツチング処理中は反応室(101
)外に設置されており、反応室(101)の壁面等に薄
膜を形成するときに反応室(101)内に設置されるよ
うな構造としてもよい。
In addition, the thin film generation device is operated in the reaction chamber (101) during the etching process.
), and may be installed inside the reaction chamber (101) when forming a thin film on the wall of the reaction chamber (101).

又、薄膜生成装置してはフィラメントから成る抵抗加熱
直熱式を用いなくてもよく抵抗加熱傍熱式の石英から成
るつぼ等の加熱部内にTi等を設は薄膜を形成させても
よい。
Furthermore, the thin film forming apparatus does not need to be a resistance heating direct heating type made of a filament, and a thin film may be formed by providing Ti or the like in the heating part of a resistive heating indirect heating type pot made of quartz or the like.

又、薄膜形成装置のフィラメントはTiでなくても良<
、Ta(タングステン)、及びMo(モリブデン)など
の遷移金属でもよい。
Also, the filament of the thin film forming device does not have to be made of Ti.
, Ta (tungsten), and Mo (molybdenum).

【発明の効果〕【Effect of the invention〕

本発明によればエツチング装置の反応室内に抵抗加熱形
の薄膜生成装置を設けて、反応室内の壁面等に付着した
反応生成物上に薄膜で被覆することにより反応生成物の
剥離を防ぐことができる。
According to the present invention, it is possible to prevent the reaction products from peeling off by providing a resistance heating type thin film generation device in the reaction chamber of the etching apparatus and coating the reaction products adhering to the walls of the reaction chamber with a thin film. can.

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

第1図は本発明の実施例におけるエツチング装置を示す
断面図、第2図は本発明の実施例における反応室内での
反応を示す概念図、第3図は従来例におけるエツチング
装置を示す断面図、第4図は反応室内での反応を示す概
念図である。 反応室・・・・・・・・・・・・・・・・・・101 
、201 。 ガス導入口・・・・・・・・・・・・102.202、
エツチング対象物・・・103.203、平行平板電極
−・・・−−−−−104a、、104b、 2D4a
、 204b。 排気口・・・・・・・・・・・・・・・・・・105.
205、薄膜生成装置・・・・・・・・・10Bシリコ
ン酸化膜・・・・・・207 A℃膜・・・・・・・・・・・・・・・・・・208レ
ジスト・・・・・・・・・・・・・・・209反応ガス
・・・・・・・・・・・・・・・210イオン・・・・
・・・・・・・・・・・・−・211ラジカル・・・・
・・・・・・・・・・・212反応生成物・・・・・・
・・・・・・113Ti・・・・・・・・・・・・・・
・・・・・・・114シリコン基板・・・・・・・・・
21513
FIG. 1 is a sectional view showing an etching apparatus according to an embodiment of the present invention, FIG. 2 is a conceptual diagram showing a reaction inside a reaction chamber in an embodiment of the present invention, and FIG. 3 is a sectional view showing an etching apparatus according to a conventional example. , FIG. 4 is a conceptual diagram showing the reaction inside the reaction chamber. Reaction chamber・・・・・・・・・・・・・・・101
, 201. Gas inlet・・・・・・・・・102.202,
Etching object...103.203, parallel plate electrode...104a, 104b, 2D4a
, 204b. Exhaust port・・・・・・・・・・・・・・・105.
205, Thin film generation device...10B Silicon oxide film...207 A℃ film...208 Resist...・・・・・・・・・・・・・・・209 Reactant gas・・・・・・・・・・・・・210 Ion・・・・
・・・・・・・・・・・・−・211 radical・・・・
・・・・・・・・・・・・212 Reaction product・・・・・・
・・・・・・113Ti・・・・・・・・・・・・・・・
・・・・・・・・・114 Silicon substrate・・・・・・・・・
21513

Claims (1)

【特許請求の範囲】[Claims] 半導体基板を収容する反応室と、被エッチング物と反応
ガスの反応により前記反応室内に付着する反応生成物と
、前記反応生成物上に薄膜を形成する抵抗加熱形の薄膜
生成装置とを具備したことを特徴とするエッチング装置
A reaction chamber for accommodating a semiconductor substrate, a reaction product deposited in the reaction chamber due to a reaction between an object to be etched and a reaction gas, and a resistance heating type thin film generation device for forming a thin film on the reaction product. An etching device characterized by:
JP18356189A 1989-07-18 1989-07-18 Etching device Pending JPH0349220A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18356189A JPH0349220A (en) 1989-07-18 1989-07-18 Etching device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18356189A JPH0349220A (en) 1989-07-18 1989-07-18 Etching device

Publications (1)

Publication Number Publication Date
JPH0349220A true JPH0349220A (en) 1991-03-04

Family

ID=16137959

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18356189A Pending JPH0349220A (en) 1989-07-18 1989-07-18 Etching device

Country Status (1)

Country Link
JP (1) JPH0349220A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5527425A (en) * 1995-07-21 1996-06-18 At&T Corp. Method of making in-containing III/V semiconductor devices

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5527425A (en) * 1995-07-21 1996-06-18 At&T Corp. Method of making in-containing III/V semiconductor devices

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