JP5227245B2 - プラズマ処理装置 - Google Patents
プラズマ処理装置 Download PDFInfo
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- JP5227245B2 JP5227245B2 JP2009108752A JP2009108752A JP5227245B2 JP 5227245 B2 JP5227245 B2 JP 5227245B2 JP 2009108752 A JP2009108752 A JP 2009108752A JP 2009108752 A JP2009108752 A JP 2009108752A JP 5227245 B2 JP5227245 B2 JP 5227245B2
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- H—ELECTRICITY
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- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
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- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
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- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/3065—Plasma etching; Reactive-ion etching
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- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
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- H01L21/3105—After-treatment
- H01L21/311—Etching the insulating layers by chemical or physical means
- H01L21/31105—Etching inorganic layers
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- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3205—Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
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Description
先ず,本発明の実施形態にかかるプラズマ処理装置100の構成例について図面を参照しながら説明する。ここでは,平面状の高周波アンテナに高周波電力を印加して処理室内に励起した処理ガスのプラズマによって,被処理基板例えば半導体ウエハ(以下,単に「ウエハ」とも称する)Wに所定のプラズマ処理を施す誘導結合型のプラズマ処理装置を例に挙げる。
ここで,本実施形態にかかる高周波アンテナ140の具体的構成例について図面を参照しながら説明する。高周波アンテナ140は,例えば図2に示すように各アンテナ素子142A,142Bについて,両端を自由端a,bとするとともに巻き方向の長さの中点又はその近傍(以下,単に「中点」という。)を接地点(グラウンド)とする1/2波長の定在波を形成できるように構成されている。
ここで,高周波アンテナ140の変形例を図面を参照しながら説明する。図12は,高周波アンテナ140の変形例を示す部分断面図であり,図13は図12に示す高周波アンテナ140を上方から見た平面図である。ここでは,各アンテナ素子142A,142Bを別々に支持して,別々に上下に駆動するアンテナ高さ調整機構を例に挙げる。
次に,本実施形態におけるプラズマ処理装置の変形例について説明する。図19は,プラズマ処理装置の変形例を示す概略構成図である。図19に示すプラズマ処理装置101は,図1に示す載置台110の代わりに,バイアス用の高周波電力を印加可能なサセプタを備えた載置台300を設けたものである。図19に示すプラズマ処理装置101において,載置台300以外の構成は図1に示すプラズマ処理装置100と同様であるため,その詳細な説明は省略する。
102 処理室
104 板状誘電体
110 載置台
120 ガス供給部
121 ガス導入口
122 ガス供給源
123 ガス供給配管
124 マスフローコントローラ
126 開閉バルブ
130 排気部
132 排気管
134 ウエハ搬出入口
136 ゲートバルブ
140 高周波アンテナ
142A 内側アンテナ素子
142B 外側アンテナ素子
144,144A,144B 挟持体
146,146A,146B 張出部
148,148A,148B アクチュエータ
149,149A,149B 駆動棒
150A,150B 高周波電源
160 シールド部材
162A 内側シールド壁
162B 外側シールド壁
163A,163B 孔
164A 内側シールド板
164B 外側シールド板
166A,166B 支持体
168A,168B アクチュエータ
169A,169B 駆動棒
200 制御部
210 操作部
220 記憶部
300 載置台
312 絶縁板
314 サセプタ支持台
316 サセプタ
320 静電チャック
322 電極
324 直流電源
326 冷媒室
328 伝熱ガス供給ライン
330 高周波電源
332 整合器
CA,CB 浮遊容量
PA,PB プラズマ
W ウエハ
Claims (13)
- 減圧された処理室内に処理ガスの誘導結合プラズマを生成することにより被処理基板に所定のプラズマ処理を施すプラズマ処理装置であって,
前記処理室内に設けられ,前記被処理基板を載置する載置台と,
前記処理室内に前記処理ガスを導入するガス供給部と,
前記処理室内を排気して減圧する排気部と,
前記載置台に対向するように板状誘電体を介して配設された平面状の高周波アンテナと,
前記高周波アンテナを覆うように設けられたシールド部材と,を備え,
前記高周波アンテナは,前記板状誘電体上の中央部に配置した内側アンテナ素子と,その外周を囲むように前記板状誘電体上の周縁部に配置した外側アンテナ素子とからなり,これらのアンテナ素子はそれぞれ両端を開放するとともに中点又はその近傍を接地し,それぞれ別々の高周波電源からの高周波の1/2波長で共振するように構成したことを特徴とするプラズマ処理装置。 - 前記シールド部材は,
前記内側アンテナ素子を囲むように前記各アンテナ素子間に設けられた筒状の内側シールド壁と,
前記外側アンテナ素子を囲むように設けられた筒状の外側シールド壁と,
前記内側アンテナ素子上に前記内側シールド壁の開口を塞ぐように設けられた内側シールド板と,
前記外側アンテナ素子上に前記各シールド壁間の開口を塞ぐように設けられた外側シールド板と,を備え,
前記各シールド板にはそれぞれ,前記各アンテナ素子との距離を別々に調整するシールド高さ調整機構を設けたことを特徴とする請求項1に記載のプラズマ処理装置。 - 前記高周波アンテナには,前記各アンテナ素子と前記板状誘電体との距離を調整するアンテナ高さ調整機構を設けたことを特徴とする請求項1又は2に記載のプラズマ処理装置。
- 前記アンテナ高さ調整機構は,前記内側アンテナ素子を駆動させて前記板状誘電体との距離を調整する機構と,前記外側アンテナ素子を駆動させて前記板状誘電体との距離を調整する機構とで構成したことを特徴とする請求項3に記載のプラズマ処理装置。
- 前記各高周波電源を制御する制御部を備え,
前記制御部は,前記各高周波電源から異なる周波数の高周波を前記各アンテナ素子に印加させることを特徴とする請求項1〜4のいずれかに記載のプラズマ処理装置。 - 前記制御部は,前記各高周波電源からの高周波をパルス変調方式によって一定の周期で前記各アンテナ素子に交互に印加させることを特徴とする請求項5に記載のプラズマ処理装置。
- 前記制御部は,前記各高周波電源の一方の高周波出力をオフする直前に他方の高周波出力をオンすることを特徴とする請求項6に記載のプラズマ処理装置。
- 前記各高周波電源の出力側にそれぞれ高周波パワーメータを設け,これらの高周波パワーメータによって検出される反射波電力が最小になるように前記高さ調整機構を制御して前記各シールド板の高さを調整することにより,前記各アンテナ素子の共振周波数を調整することを特徴とする請求項2〜7のいずれかに記載のプラズマ処理装置。
- 前記各アンテナ素子は,渦巻きコイル状であることを特徴とする請求項1〜8のいずれかに記載のプラズマ処理装置。
- 減圧された処理室内に処理ガスの誘導結合プラズマを生成することにより被処理基板に所定のプラズマ処理を施すプラズマ処理装置であって,
前記処理室内に設けられ,前記被処理基板を載置するサセプタと,
前記サセプタに高周波電力を印加するサセプタ用高周波電源と,
前記処理室内に前記処理ガスを導入するガス供給部と,
前記処理室内を排気して減圧する排気部と,
前記載置台に対向するように板状誘電体を介して配設された平面状の高周波アンテナと,
前記高周波アンテナを覆うように設けられたシールド部材と,を備え,
前記高周波アンテナは,前記板状誘電体上の中央部に配置した内側アンテナ素子と,その外周を囲むように配置した外側アンテナ素子とからなり,これらのアンテナ素子はそれぞれ両端を開放するとともに中点又はその近傍を接地し,それぞれ別々のアンテナ用高周波電源からの高周波の1/2波長で共振するように構成したことを特徴とするプラズマ処理装置。 - 前記外側アンテナ素子は,前記内側アンテナ素子の外周を囲むように同心状に配置したことを特徴とする請求項1又は10に記載のプラズマ処理装置。
- 前記外側アンテナ素子を複数設け,前記各外側アンテナ素子は,前記内側アンテナ素子の外周を囲むように隣設したことを特徴とする請求項1又は10に記載のプラズマ処理装置。
- 前記内側アンテナ素子と前記外側アンテナ素子は,その両方又は一方をさらに2つ以上に分割して同心状に配置したことを特徴とする請求項1又は10に記載のプラズマ処理装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009108752A JP5227245B2 (ja) | 2009-04-28 | 2009-04-28 | プラズマ処理装置 |
TW099113299A TWI524820B (zh) | 2009-04-28 | 2010-04-27 | Plasma processing device |
KR1020100039700A KR101690328B1 (ko) | 2009-04-28 | 2010-04-28 | 플라즈마 처리 장치 |
CN2010101708230A CN101877312B (zh) | 2009-04-28 | 2010-04-28 | 等离子体处理装置 |
US12/769,099 US8551289B2 (en) | 2009-04-28 | 2010-04-28 | Plasma processing apparatus |
Applications Claiming Priority (1)
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JP2009108752A JP5227245B2 (ja) | 2009-04-28 | 2009-04-28 | プラズマ処理装置 |
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KR101690328B1 (ko) | 2016-12-27 |
US8551289B2 (en) | 2013-10-08 |
CN101877312A (zh) | 2010-11-03 |
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TWI524820B (zh) | 2016-03-01 |
CN101877312B (zh) | 2012-08-22 |
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