JP7008918B2 - 選択的窒化シリコンエッチングの方法 - Google Patents
選択的窒化シリコンエッチングの方法 Download PDFInfo
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- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P50/00—Etching of wafers, substrates or parts of devices
- H10P50/20—Dry etching; Plasma etching; Reactive-ion etching
- H10P50/24—Dry etching; Plasma etching; Reactive-ion etching of semiconductor materials
- H10P50/242—Dry etching; Plasma etching; Reactive-ion etching of semiconductor materials of Group IV materials
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- H10P50/00—Etching of wafers, substrates or parts of devices
- H10P50/20—Dry etching; Plasma etching; Reactive-ion etching
- H10P50/28—Dry etching; Plasma etching; Reactive-ion etching of insulating materials
- H10P50/282—Dry etching; Plasma etching; Reactive-ion etching of insulating materials of inorganic materials
- H10P50/283—Dry etching; Plasma etching; Reactive-ion etching of insulating materials of inorganic materials by chemical means
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- H10P50/00—Etching of wafers, substrates or parts of devices
- H10P50/20—Dry etching; Plasma etching; Reactive-ion etching
- H10P50/26—Dry etching; Plasma etching; Reactive-ion etching of conductive or resistive materials
- H10P50/264—Dry etching; Plasma etching; Reactive-ion etching of conductive or resistive materials by chemical means
- H10P50/266—Dry etching; Plasma etching; Reactive-ion etching of conductive or resistive materials by chemical means by vapour etching only
- H10P50/267—Dry etching; Plasma etching; Reactive-ion etching of conductive or resistive materials by chemical means by vapour etching only using plasmas
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- H10P72/00—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof
- H10P72/04—Apparatus for manufacture or treatment
- H10P72/0402—Apparatus for fluid treatment
- H10P72/0418—Apparatus for fluid treatment for etching
- H10P72/0421—Apparatus for fluid treatment for etching for drying etching
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- H10P76/00—Manufacture or treatment of masks on semiconductor bodies, e.g. by lithography or photolithography
- H10P76/40—Manufacture or treatment of masks on semiconductor bodies, e.g. by lithography or photolithography of masks comprising inorganic materials
- H10P76/408—Manufacture or treatment of masks on semiconductor bodies, e.g. by lithography or photolithography of masks comprising inorganic materials characterised by their sizes, orientations, dispositions, behaviours or shapes
- H10P76/4085—Manufacture or treatment of masks on semiconductor bodies, e.g. by lithography or photolithography of masks comprising inorganic materials characterised by their sizes, orientations, dispositions, behaviours or shapes characterised by the processes involved to create the masks
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- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
- H10P14/60—Formation of materials, e.g. in the shape of layers or pillars of insulating materials
- H10P14/63—Formation of materials, e.g. in the shape of layers or pillars of insulating materials characterised by the formation processes
- H10P14/6326—Deposition processes
- H10P14/6328—Deposition from the gas or vapour phase
- H10P14/6334—Deposition from the gas or vapour phase using decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition
- H10P14/6336—Deposition from the gas or vapour phase using decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition in the presence of a plasma [PECVD]
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- H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
- H10P14/60—Formation of materials, e.g. in the shape of layers or pillars of insulating materials
- H10P14/63—Formation of materials, e.g. in the shape of layers or pillars of insulating materials characterised by the formation processes
- H10P14/6326—Deposition processes
- H10P14/6328—Deposition from the gas or vapour phase
- H10P14/6334—Deposition from the gas or vapour phase using decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition
- H10P14/6339—Deposition from the gas or vapour phase using decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition deposition by cyclic CVD, e.g. ALD, ALE or pulsed CVD
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- H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
- H10P14/60—Formation of materials, e.g. in the shape of layers or pillars of insulating materials
- H10P14/69—Inorganic materials
- H10P14/694—Inorganic materials composed of nitrides
- H10P14/6943—Inorganic materials composed of nitrides containing silicon
- H10P14/69433—Inorganic materials composed of nitrides containing silicon the material being a silicon nitride not containing oxygen, e.g. SixNy or SixByNz
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Description
e-+NF3→NF2+F-
NF+NF→N2+2F
NF+NF2→N2+F2+F
O+NF2→NF+OF
O+NF→N2+F2+F
2OF→2F+O2
O+OF→O2+F
Si3N4+24F→3SiF4+4NF3
Claims (16)
- 基板処理方法であって、
プラズマ処理チャンバ内に、SiNを含む第1の材料と、該第1の材料とは異なる第2の材料とを含む基板を提供するステップと、
NF3とO2とを含むプロセスガスをプラズマ励起するステップと、
前記基板をプラズマ励起された前記プロセスガスに暴露して、前記第2の材料に対して前記第1の材料を選択的にエッチングするステップと、を含み、
O2/NF3ガス流量比が0.1と0.5の間である、方法。 - 前記第2の材料が、Si、SiO2、及びそれらの組合せからなる群から選択される、請求項1に記載の方法。
- 前記暴露中、前記プラズマ処理チャンバ内のガス圧力が300mTorrより大きい、請求項1に記載の方法。
- O2/NF3ガス流量比が1/3である、請求項1に記載の方法。
- 0.1と0.5の間にあるO2/NF3ガス流量比を選択して、前記第2の材料に対して前記第1の材料に対する最大エッチング選択性比をもたらすステップをさらに含む、請求項1に記載の方法。
- プラズマ励起された前記プロセスガス中のプラズマ種の運動エネルギーが、前記第1の材料及び前記第2の材料のスパッタリング閾値未満である、請求項1に記載の方法。
- プラズマ励起された前記プロセスガスを形成することは、接地されているか又は電力が供給されていない上部プレート電極と、前記基板を支持するRF電力供給された下部プレート電極と、を含む容量結合プラズマ源を使用してプラズマを生成することを含み、該下部プレート電極に印加されるRF電力は、前記第1の材料及び前記第2の材料のスパッタリング閾値未満の運動エネルギーを有する、プラズマ励起された前記プロセスガス中にプラズマ種を生成する、請求項1に記載の方法。
- 前記下部プレート電極に印加される前記RF電力は、50W以下である、請求項7に記載の方法。
- 前記プロセスガスが、Ar、N2、又はArとN2をさらに含む、請求項1に記載の方法。
- 前記プロセスガスが、NF3、O2、N2及びArからなる、請求項1に記載の方法。
- 前記第2の材料が前記基板上に隆起フィーチャを含み、前記第1の材料が該隆起フィーチャの水平部分及び垂直部分にコンフォーマル膜を形成し、前記暴露が該隆起フィーチャの垂直部分上に前記第1の材料の側壁スペーサを形成するスペーサエッチングプロセスを含む、請求項1に記載の方法。
- 前記第2の材料が前記基板上に隆起フィーチャを含み、前記第1の材料が前記隆起フィーチャの垂直部分上に側壁スペーサを形成し、前記暴露が前記隆起フィーチャから前記第1の材料の側壁スペーサを除去する、請求項1に記載の方法。
- 前記第1の材料が前記基板上に隆起フィーチャを含み、前記第2の材料が前記隆起フィーチャの垂直部分上に側壁スペーサを形成し、前記暴露が該側壁スペーサではなく前記第1の材料の隆起フィーチャを除去する、請求項1に記載の方法。
- プラズマ励起された前記プロセスガスを形成することは、高ラジカル対イオンフラックス比を生成する遠隔プラズマ源を使用してプラズマを生成するステップを含む、請求項1に記載の方法。
- 基板処理方法であって、
プラズマ処理チャンバ内に、SiNを含む第1の材料と、Si、SiO2及びそれらの組合せからなる群から選択される第2の材料とを含む基板を提供するステップと、
NF3とO2とを含むプラズマ励起されたプロセスガスを形成するステップと、
前記基板をプラズマ励起された前記プロセスガスに暴露して、前記第2の材料に対して前記第1の材料を選択的にエッチングするステップと、を含み、
前記暴露は、
プラズマ励起された前記プロセスガス中のプラズマ種の運動エネルギーが、前記第1の材料及び第2の材料のスパッタリング閾値未満である
プラズマ処理条件を満たす、方法。 - 前記プロセスガスが、Ar、N2、又はArとN2をさらに含む、請求項15に記載の方法。
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201662342991P | 2016-05-29 | 2016-05-29 | |
| US62/342,991 | 2016-05-29 | ||
| US201662384481P | 2016-09-07 | 2016-09-07 | |
| US62/384,481 | 2016-09-07 | ||
| PCT/US2017/034860 WO2017210140A1 (en) | 2016-05-29 | 2017-05-26 | Method of selective silicon nitride etching |
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| Publication Number | Publication Date |
|---|---|
| JP2019517742A JP2019517742A (ja) | 2019-06-24 |
| JP7008918B2 true JP7008918B2 (ja) | 2022-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2019514201A Active JP7008918B2 (ja) | 2016-05-29 | 2017-05-26 | 選択的窒化シリコンエッチングの方法 |
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| Country | Link |
|---|---|
| US (1) | US10381235B2 (ja) |
| JP (1) | JP7008918B2 (ja) |
| KR (1) | KR102523717B1 (ja) |
| TW (1) | TWI648785B (ja) |
| WO (1) | WO2017210140A1 (ja) |
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| KR102523717B1 (ko) | 2023-04-19 |
| US20170345674A1 (en) | 2017-11-30 |
| US10381235B2 (en) | 2019-08-13 |
| KR20190004363A (ko) | 2019-01-11 |
| WO2017210140A1 (en) | 2017-12-07 |
| TWI648785B (zh) | 2019-01-21 |
| TW201802936A (zh) | 2018-01-16 |
| JP2019517742A (ja) | 2019-06-24 |
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