JP6553049B2 - 窒化ケイ素の選択的なエッチング - Google Patents
窒化ケイ素の選択的なエッチング Download PDFInfo
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- JP6553049B2 JP6553049B2 JP2016541971A JP2016541971A JP6553049B2 JP 6553049 B2 JP6553049 B2 JP 6553049B2 JP 2016541971 A JP2016541971 A JP 2016541971A JP 2016541971 A JP2016541971 A JP 2016541971A JP 6553049 B2 JP6553049 B2 JP 6553049B2
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- 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
- H10P14/66—Formation of materials, e.g. in the shape of layers or pillars of insulating materials characterised by the type of materials
- H10P14/668—Formation of materials, e.g. in the shape of layers or pillars of insulating materials characterised by the type of materials the materials being characterised by the deposition precursor materials
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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
- H01J37/32009—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
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- 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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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- 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
- H10P50/26—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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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- 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
- H10P50/28—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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2237/00—Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging
- H01J2237/32—Processing objects by plasma generation
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Description
図3Aは、実施形態による基板処理チャンバ1001である。遠隔プラズマシステム1010は、その後にガス入り口アセンブリ1011を通過する、フッ素含有前駆体を処理し得る。2つの異なるガス供給チャネルが、ガス入り口アセンブリ1011の中に見える。第1のチャネル1012が、遠隔プラズマシステム1010(RPS)をちょうど通過した前駆体を導き、一方、第2のチャネル1013が、遠隔プラズマシステム1010を迂回した前駆体を導く。第1のチャネル1012が、窒素及び酸素含有前駆体を導き、第2のチャネル1013が、フッ素含有前駆体を導く。
Claims (15)
- パターン形成された基板をエッチングする方法であって、前記方法が、
露出された窒化ケイ素を有する前記パターン形成された基板を、基板処理チャンバの基板処理領域の中へ移送すること、
窒素及び酸素含有前駆体を、第2の遠隔プラズマ領域に流体結合された第1の遠隔プラズマ領域の中へ流しながら、前記第1の遠隔プラズマ領域内で第1の遠隔プラズマ出力を使用して第1の遠隔プラズマを生成して、酸化性プラズマ流出物を生み出すこと、
フッ素含有前駆体を、前記基板処理領域に流体結合された前記第2の遠隔プラズマ領域の中へ流しながら、前記第2の遠隔プラズマ領域内で前記第1の遠隔プラズマ出力よりも小さい第2の遠隔プラズマ出力を使用して第2の遠隔プラズマを生成して、エッチングプラズマ流出物を生み出すことであって、前記酸化性プラズマ流出物が前記第2の遠隔プラズマ内で更に励起される、エッチングプラズマ流出物を生み出すこと、
前記酸化性プラズマ流出物及び前記エッチングプラズマ流出物の各々を、シャワーヘッド内の貫通孔を通して前記基板処理領域の中へ流すこと、並びに
前記露出された窒化ケイ素をエッチングすることであって、前記パターン形成された基板が露出されたケイ素を更に含む、エッチングすることを含む、方法。 - 前記窒素及び酸素含有前駆体が、N2O、NO、NO2、又はN2O2のうちの1つを含む、請求項1に記載の方法。
- 前記第1の遠隔プラズマが、誘導性結合プラズマである、請求項1に記載の方法。
- 前記第2の遠隔プラズマが、容量性結合プラズマである、請求項1に記載の方法。
- 前記エッチング動作の選択性(露出された窒化ケイ素:露出されたケイ素)が、約20:1以上である、請求項1に記載の方法。
- 前記フッ素含有前駆体が、NF3を含む、請求項1に記載の方法。
- 前記フッ素含有前駆体が、フッ化水素、原子状フッ素、二原子フッ素、四フッ化炭素、及び二フッ化キセノンから成る群から選択された前駆体を含む、請求項1に記載の方法。
- パターン形成された基板をエッチングする方法であって、前記方法が、
露出された窒化ケイ素及び露出されたケイ素を含む前記パターン形成された基板を、基板処理チャンバの基板処理領域の中へ移送すること、
窒素及び酸素含有前駆体を、第1の遠隔プラズマ領域の中へ流しながら、前記第1の遠隔プラズマ領域内で第1の遠隔プラズマ出力を使用して第1の遠隔プラズマを生成して、酸化性プラズマ流出物を生み出すこと、
フッ素含有前駆体を、前記第1の遠隔プラズマ領域とは異なる第2の遠隔プラズマ領域の中へ流しながら、前記第2の遠隔プラズマ領域内で前記第1の遠隔プラズマ出力よりも小さい第2の遠隔プラズマ出力を使用して第2の遠隔プラズマを生成して、ラジカルフッ素を生み出すこと、
前記基板処理チャンバ内で前記酸化性プラズマ流出物を前記ラジカルフッ素と混合させることであって、前記酸化性プラズマ流出物及び前記ラジカルフッ素が、複数のチャネルを有するシャワーヘッドの個別のチャネルを通して流される、混合させること、並びに
前記露出されたケイ素よりも速いエッチング速度で前記露出された窒化ケイ素を選択的にエッチングすることを含む、方法。 - 前記ラジカルフッ素及び前記酸化性プラズマ流出物が、前記基板処理領域に入る前に、互いに出会うことがない、請求項8に記載の方法。
- 前記窒素及び酸素含有前駆体が、窒素及び酸素から成る、請求項8に記載の方法。
- 前記窒素及び酸素含有前駆体が、N2O、NO、NO2、又はN2O2のうちの1つを含む、請求項8に記載の方法。
- 前記第1の遠隔プラズマが誘導性結合プラズマであり、前記第2の遠隔プラズマが容量性結合プラズマである、請求項8に記載の方法。
- 前記フッ素含有前駆体が、NF3を含む、請求項8に記載の方法。
- 前記フッ素含有前駆体が、フッ化水素、原子状フッ素、二原子フッ素、四フッ化炭素、及び二フッ化キセノンから成る群から選択された前駆体を含む、請求項8に記載の方法。
- パターン形成された基板をエッチングする方法であって、前記方法が、
露出された窒化ケイ素及び露出されたケイ素を含む前記パターン形成された基板を、基板処理チャンバの基板処理領域の中へ移送すること、
N2Oを、前記基板処理チャンバの外側に配置された且つ第1の遠隔プラズマ出力を使用して生成された第1の遠隔プラズマの中へ流し、酸化性プラズマ流出物を生み出すこと、
NF3を、前記第1の遠隔プラズマから分離された且つ前記第1の遠隔プラズマ出力よりも小さい第2の遠隔プラズマ出力を使用して生成された第2の遠隔プラズマの中へ流し、フッ素含有プラズマ流出物を生み出すことであって、前記NF3が前記第1の遠隔プラズマ内で実質的に励起されない、フッ素含有プラズマ流出物を生み出すこと、
前記基板処理チャンバ内で前記酸化性プラズマ流出物を前記フッ素含有プラズマ流出物と混合させること、並びに
前記露出されたケイ素に対して前記露出された窒化ケイ素を選択的にエッチングすることを含む、方法。
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201361878444P | 2013-09-16 | 2013-09-16 | |
| US61/878,444 | 2013-09-16 | ||
| US14/089,182 US8956980B1 (en) | 2013-09-16 | 2013-11-25 | Selective etch of silicon nitride |
| US14/089,182 | 2013-11-25 | ||
| PCT/US2014/049215 WO2015038252A1 (en) | 2013-09-16 | 2014-07-31 | Selective etch of silicon nitride |
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| Publication Number | Publication Date |
|---|---|
| JP2016537824A JP2016537824A (ja) | 2016-12-01 |
| JP6553049B2 true JP6553049B2 (ja) | 2019-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2016541971A Active JP6553049B2 (ja) | 2013-09-16 | 2014-07-31 | 窒化ケイ素の選択的なエッチング |
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| Country | Link |
|---|---|
| US (2) | US8956980B1 (ja) |
| JP (1) | JP6553049B2 (ja) |
| KR (1) | KR102305317B1 (ja) |
| CN (1) | CN105580118B (ja) |
| TW (1) | TWI631614B (ja) |
| WO (1) | WO2015038252A1 (ja) |
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-
2013
- 2013-11-25 US US14/089,182 patent/US8956980B1/en active Active
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2014
- 2014-07-31 CN CN201480050763.5A patent/CN105580118B/zh active Active
- 2014-07-31 WO PCT/US2014/049215 patent/WO2015038252A1/en not_active Ceased
- 2014-07-31 KR KR1020167010020A patent/KR102305317B1/ko active Active
- 2014-07-31 JP JP2016541971A patent/JP6553049B2/ja active Active
- 2014-08-04 TW TW103126616A patent/TWI631614B/zh active
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Also Published As
| Publication number | Publication date |
|---|---|
| KR102305317B1 (ko) | 2021-09-28 |
| CN105580118A (zh) | 2016-05-11 |
| WO2015038252A1 (en) | 2015-03-19 |
| TW201513215A (zh) | 2015-04-01 |
| KR20160056935A (ko) | 2016-05-20 |
| CN105580118B (zh) | 2019-03-22 |
| US8956980B1 (en) | 2015-02-17 |
| JP2016537824A (ja) | 2016-12-01 |
| TWI631614B (zh) | 2018-08-01 |
| US9209012B2 (en) | 2015-12-08 |
| US20150079797A1 (en) | 2015-03-19 |
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