JP7842866B2 - 誘導結合型プラズマ光源 - Google Patents
誘導結合型プラズマ光源Info
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- JP7842866B2 JP7842866B2 JP2024531511A JP2024531511A JP7842866B2 JP 7842866 B2 JP7842866 B2 JP 7842866B2 JP 2024531511 A JP2024531511 A JP 2024531511A JP 2024531511 A JP2024531511 A JP 2024531511A JP 7842866 B2 JP7842866 B2 JP 7842866B2
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- 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
- H01J37/32431—Constructional details of the reactor
- H01J37/32458—Vessel
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- 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
- H01J37/32917—Plasma diagnostics
- H01J37/32935—Monitoring and controlling tubes by information coming from the object and/or discharge
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- 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
- H01J37/32082—Radio frequency generated discharge
- H01J37/32137—Radio frequency generated discharge controlling of the discharge by modulation of energy
- H01J37/32146—Amplitude modulation, includes pulsing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- 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
- H01J37/32357—Generation remote from the workpiece, e.g. down-stream
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- 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
- H01J37/32431—Constructional details of the reactor
- H01J37/3244—Gas supply means
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05G—X-RAY TECHNIQUE
- H05G2/00—Apparatus or processes specially adapted for producing X-rays, not involving X-ray tubes, e.g. involving generation of a plasma
- H05G2/001—Production of X-ray radiation generated from plasma
- H05G2/007—Production of X-ray radiation generated from plasma involving electric or magnetic fields in the process of plasma generation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2229/00—Details of cathode ray tubes or electron beam tubes
- H01J2229/70—Electron beam control outside the vessel
- H01J2229/703—Electron beam control outside the vessel by magnetic fields
- H01J2229/7031—Cores for field producing elements, e.g. ferrite
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J65/00—Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
- H01J65/04—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J65/00—Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
- H01J65/04—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels
- H01J65/042—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field
- H01J65/048—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field the field being produced by using an excitation coil
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Optics & Photonics (AREA)
- X-Ray Techniques (AREA)
- Chemical Vapour Deposition (AREA)
Description
[0002]多数の商業及び学問用途が、スペクトルの極紫外(EUV)領域における高輝度の光を必要としている。例えば、EUV光は、計測学、加速試験、フォトレジスト、欠陥検査、及び顕微鏡法など、多数の工業用途に必要とされる。EUV光の他の用途としては、顕微鏡法、分光学、面積式イメージング、及びブランクマスク検査が挙げられる。これら及び他の用途は、極紫外光子のこれらの重要な源から高い信頼性、小さい物理的サイズ、低い固定費、低い運転費、及び低い複雑性を有するEUV源を必要とする。
[0017]本教示はこれより、添付の図面に示されるようなそれらの例示的な実施形態を参照してより詳細に説明される。本教示は、様々な実施形態及び例と併せて説明されるが、本教示がそのような実施形態に限定されることは意図されない。逆に、本教示は、当業者によって理解されるように、様々な代替形態、修正形態、及び等価物を包含する。本明細書における教示を利用できる当業者は、本明細書に説明されるような本開示の範囲内である、追加の実装形態、修正形態、及び実施形態、並びに他の使用分野を認識するものとする。
等価物
[0061]本出願者の教示は、様々な実施形態と併せて説明されるが、本出願者の教示がそのような実施形態に限定されることは意図されない。対照的に、本出願者の教示は、本教示の趣旨及び範囲から逸脱することなく本明細書においてなされ得る、当業者により理解されるであろう様々な代替形態、修正形態、及び等価物を包含する。
Claims (32)
- プラズマチャンバであって、
a)プラズマ閉じ込め領域を画定するプラズマ発生領域と、
b)発生した光が通過して前記チャンバの外へ出ることを可能にする、前記プラズマ発生領域の第1の側に隣接して位置付けられるポートと、
c)前記プラズマ発生領域に結合される高電圧領域と、
d)前記高電圧領域に結合される接地領域であって、接地に結合されるように構成される外面を画定する接地領域と、
e)前記接地領域の一部を囲み、前記高電圧領域と前記接地領域との間の境界に位置付けられた電流防止誘導コアと、を備える
、プラズマチャンバ。 - 前記プラズマチャンバの軸方向に垂直な方向において、前記高電圧領域の幅が、前記接地領域の幅よりも大きい、請求項1に記載のプラズマチャンバ。
- 前記プラズマチャンバの軸方向に垂直な方向において、前記高電圧領域の幅が、前記接地領域の幅よりも少なくとも2倍大きい、請求項1に記載のプラズマチャンバ。
- 前記プラズマチャンバの軸方向に垂直な方向において、前記プラズマ発生領域の幅が、前記接地領域の幅よりも小さい、請求項1に記載のプラズマチャンバ。
- 前記接地領域に結合される第1の端部及び接地電位に結合されるように構成される第2の端部を有する絶縁領域をさらに備える、請求項1に記載のプラズマチャンバ。
- 前記絶縁領域の前記第2の端部が、ポートを備える、請求項5に記載のプラズマチャンバ。
- 前記絶縁領域の前記第2の端部における前記ポートに位置付けられるガス供給ポートをさらに備え、前記ガス供給ポートが、前記プラズマ発生領域にガスを提供する、請求項6に記載のプラズマチャンバ。
- 前記絶縁領域の前記第2の端部における前記ポートが、プラズマ診断ポートを備える、請求項6に記載のプラズマチャンバ。
- 前記絶縁領域の前記第2の端部における前記ポートが、光を通すためのアパーチャを備える、請求項6に記載のプラズマチャンバ。
- 前記プラズマ発生領域において発生した少なくとも一部の光を反射して前記プラズマ発生領域へ戻すように配向される、前記接地領域に隣接して位置付けられるミラーをさらに備える、請求項1に記載のプラズマチャンバ。
- 前記接地領域に結合される第1の端部及び接地電位に結合されるように構成される第2の端部を有する絶縁領域をさらに備え、
前記ミラーが、前記プラズマ発生領域において発生した一部の光が前記絶縁領域の前記第2の端部における前記ポートを通過するように、部分的に透過させる、請求項10に記載のプラズマチャンバ。 - 前記プラズマ発生領域に近接して位置付けられるガス供給ポートをさらに備える、請求項1に記載のプラズマチャンバ。
- 前記プラズマ発生領域に近接して位置付けられる真空ポンプポートをさらに備える、請求項1に記載のプラズマチャンバ。
- a)プラズマチャンバであって、
i)プラズマ閉じ込め領域を画定するプラズマ発生領域と、
ii)発生した光が通過して前記チャンバの外へ出ることを可能にする、前記プラズマ発生領域の第1の端部に隣接して位置付けられるポートと、
iii)前記プラズマ発生領域の第2の端部に結合される高電圧領域と、
iv)前記高電圧領域に結合される接地領域と、を備える、プラズマチャンバ、
b)前記接地領域に結合される第1の端部及び接地電位に結合されるように構成される第2の端部を有する絶縁領域であって、前記プラズマ発生領域において発生したイオンの引き付けを低減するために前記接地領域に近接する負電位を減少させる、絶縁領域、
c)電流をプラズマループへ結合する、前記プラズマ発生領域の周りに位置付けられる内側誘導コア、
d)前記内側誘導コアの周りに位置付けられる外側誘導コア、及び
e)前記接地領域の一部分の周りに位置付けられ、電流が前記接地領域を流れることを防ぐように構成される、誘導コアを具備する、光源。 - 前記高電圧領域の幅が、前記接地領域の幅よりも大きい、請求項14に記載の光源。
- 前記高電圧領域の幅が、前記接地領域の幅よりも少なくとも2倍大きい、請求項14に記載の光源。
- 前記プラズマ発生領域の幅が、前記接地領域の幅よりも小さい、請求項14に記載の光源。
- 前記絶縁領域の前記第2の端部が、ポートを備える、請求項14に記載の光源。
- 前記絶縁領域の前記第2の端部における前記ポートに位置付けられるガス供給ポートをさらに備え、前記ガス供給ポートが、前記プラズマ発生領域にガスを提供する、請求項18に記載の光源。
- 前記絶縁領域の前記第2の端部における前記ポートが、プラズマ診断ポートを備える、請求項18に記載の光源。
- 前記絶縁領域の前記第2の端部における前記ポートが、光を通すためのアパーチャを備える、請求項18に記載の光源。
- 前記プラズマ発生領域において発生した少なくとも一部の光を反射して前記プラズマ発生領域へ戻すように配向される、前記接地領域に隣接して位置付けられるミラーをさらに備える、請求項14に記載の光源。
- 前記ミラーが、前記プラズマ発生領域において発生した一部の光が前記ポートを通過するように、部分的に透過させる、請求項22に記載の光源。
- 前記プラズマ発生領域に近接して位置付けられるガス供給ポートをさらに備える、請求項14に記載の光源。
- 前記プラズマ発生領域に近接して位置付けられる真空ポンプポートをさらに備える、請求項14に記載の光源。
- 光を発生させる方法であって、
a)プラズマチャンバにおけるプラズマ閉じ込め領域に供給ガスを提供するステップと、
b)前記プラズマチャンバにおける前記プラズマ閉じ込め領域に接続される高電圧領域に高電圧パルスを印加するステップと、
c)前記高電圧領域に電気的に接続される接地領域を接地するステップと、
d)前記プラズマ閉じ込め領域の周りに位置付けられる内側磁気コアを囲む外側磁気コアに電気的に接続される少なくとも1つのコンデンサに一連の電圧パルスを印加するステップであって、前記電圧パルスは、前記外側磁気コアが飽和するように少なくとも1つのコンデンサを帯電させ、結果として放電する前記少なくとも1つのコンデンサが前記内側磁気コアに電流パルスを前記プラズマ閉じ込め領域へ結合させ、以て、プラズマを、前記プラズマが漏れ電流によって電圧パルス間で持続されるループで形成し、前記プラズマは、前記プラズマ閉じ込め領域に隣接して位置付けられる透明ポート中を伝播する光を発生させる、ステップと、
e)前記接地領域に結合される絶縁領域を接地し、以て、前記プラズマループにおいて発生したイオンの前記接地領域への引き付けを低減するステップと、
f)前記プラズマチャンバの前記接地領域の一部分を囲む誘導コアに電流を印加し、以て、前記接地領域への電流を低減するステップと、を含む、方法。 - 前記プラズマ閉じ込め領域に隣接して位置付けられる透明ポートを通過する光の輝度を増加させるために、前記接地領域に入る前記発生した光の一部分を反射して前記プラズマ閉じ込め領域へと戻すステップをさらに含む、請求項26に記載の方法。
- 前記接地領域に入る前記発生した光の一部分を、前記絶縁領域に隣接して位置付けられる透明ポートに通すステップをさらに含む、請求項26に記載の方法。
- 前記絶縁領域に隣接して位置付けられる前記透明ポートを通過した前記発生した光を特徴付けるステップをさらに含む、請求項28に記載の方法。
- 診断プローブビームを、前記絶縁領域に隣接して位置付けられる透明ポートを介して、前記プラズマ閉じ込め領域へ通すステップをさらに含む、請求項26に記載の方法。
- 前記診断プローブビーム及び前記プラズマの相互作用に応答して、前記プラズマの特性を測定するステップをさらに含む、請求項30に記載の方法。
- 前記絶縁領域に隣接して位置付けられるポートにガスを印加するステップをさらに含む、請求項26に記載の方法。
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US17/676,712 | 2022-02-21 | ||
| US17/676,712 US12165856B2 (en) | 2022-02-21 | 2022-02-21 | Inductively coupled plasma light source |
| PCT/US2023/061198 WO2023158909A1 (en) | 2022-02-21 | 2023-01-24 | Inductively coupled plasma light source |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2025508293A JP2025508293A (ja) | 2025-03-26 |
| JP7842866B2 true JP7842866B2 (ja) | 2026-04-08 |
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| JP2024531511A Active JP7842866B2 (ja) | 2022-02-21 | 2023-01-24 | 誘導結合型プラズマ光源 |
Country Status (7)
| Country | Link |
|---|---|
| US (2) | US12165856B2 (ja) |
| EP (1) | EP4420488A4 (ja) |
| JP (1) | JP7842866B2 (ja) |
| KR (1) | KR20240125589A (ja) |
| CN (1) | CN118251968A (ja) |
| TW (1) | TW202347412A (ja) |
| WO (1) | WO2023158909A1 (ja) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11587781B2 (en) | 2021-05-24 | 2023-02-21 | Hamamatsu Photonics K.K. | Laser-driven light source with electrodeless ignition |
| US12156322B2 (en) * | 2022-12-08 | 2024-11-26 | Hamamatsu Photonics K.K. | Inductively coupled plasma light source with switched power supply |
| US12578076B2 (en) | 2023-06-05 | 2026-03-17 | Hamamatsu Photonics K.K. | Dual-output laser-driven light source |
| CN119986503B (zh) * | 2025-01-26 | 2025-09-26 | 上海科技大学 | 激光触发校准罗氏线圈系统 |
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| EP4420488A1 (en) | 2024-08-28 |
| WO2023158909A1 (en) | 2023-08-24 |
| JP2025508293A (ja) | 2025-03-26 |
| US12165856B2 (en) | 2024-12-10 |
| TW202347412A (zh) | 2023-12-01 |
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| US20250069870A1 (en) | 2025-02-27 |
| US20230268167A1 (en) | 2023-08-24 |
| CN118251968A (zh) | 2024-06-25 |
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