JP6920219B2 - 酸化ケイ素膜の選択的堆積 - Google Patents
酸化ケイ素膜の選択的堆積 Download PDFInfo
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- JP6920219B2 JP6920219B2 JP2017567078A JP2017567078A JP6920219B2 JP 6920219 B2 JP6920219 B2 JP 6920219B2 JP 2017567078 A JP2017567078 A JP 2017567078A JP 2017567078 A JP2017567078 A JP 2017567078A JP 6920219 B2 JP6920219 B2 JP 6920219B2
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- silicon oxide
- oxide layer
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims description 93
- 229910052814 silicon oxide Inorganic materials 0.000 title claims description 93
- 230000008021 deposition Effects 0.000 title claims description 27
- 239000000758 substrate Substances 0.000 claims description 55
- 229910052710 silicon Inorganic materials 0.000 claims description 50
- 239000010703 silicon Substances 0.000 claims description 50
- 238000000034 method Methods 0.000 claims description 49
- 238000000151 deposition Methods 0.000 claims description 37
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 31
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 28
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 28
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 19
- 238000001039 wet etching Methods 0.000 claims description 15
- 238000005530 etching Methods 0.000 claims description 7
- 238000000137 annealing Methods 0.000 claims description 6
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims 6
- 238000010884 ion-beam technique Methods 0.000 claims 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 47
- 239000007789 gas Substances 0.000 description 23
- 239000010408 film Substances 0.000 description 22
- 230000015572 biosynthetic process Effects 0.000 description 10
- 239000000463 material Substances 0.000 description 9
- 239000011800 void material Substances 0.000 description 7
- 150000004767 nitrides Chemical class 0.000 description 6
- 239000002243 precursor Substances 0.000 description 6
- 238000005137 deposition process Methods 0.000 description 5
- 238000009832 plasma treatment Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 230000006911 nucleation Effects 0.000 description 3
- 238000010899 nucleation Methods 0.000 description 3
- 229920002120 photoresistant polymer Polymers 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003989 dielectric material Substances 0.000 description 2
- 238000001312 dry etching Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005121 nitriding Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005513 bias potential Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005108 dry cleaning Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 230000007261 regionalization Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000012686 silicon precursor Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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Description
[0002] 半導体デバイスの幾何形状は、数十年前の導入以来、サイズが著しく縮小している。現在の半導体製造機器は、45nm、32nm及び28nmの特徴サイズを有するデバイスをごく普通に製作し、更に小さな幾何形状を有するデバイスを作るために、新たな機器が開発され、実装されている。デバイスサイズの減少は、アスペクト比の小さな特徴、すなわち、デバイス内に形成される特徴の高さに対する幅の比率が小さな特徴をもたらす。特徴の幅が狭くなると、間隙充填とパターン形成はより困難になる。
Claims (15)
- 基板上に酸化ケイ素層を選択的に形成する方法であって、
基板の表面上にパターン形成された特徴内に酸化ケイ素層を選択的に堆積することを含み、
前記パターン形成された特徴は、前記パターン形成された特徴の底部に堆積面及び一又は複数の側壁を含み、前記側壁の各々はベース及びキャップを有し、前記キャップは窒化ケイ素を含み、前記ベースは酸化ケイ素を含み、前記キャップの第1の表面積は、前記側壁の表面積の少なくとも3分の1であり、前記ベースの第2の表面積は、前記側壁の表面積の残りの部分であり、
前記堆積面は基本的にシリコンからなり、且つ、
前記選択的に堆積された酸化ケイ素層は、前記パターン形成された特徴をオルトケイ酸テトラエチル(TEOS)及びオゾンに曝露することによって前記堆積面上に形成され、前記選択的に堆積された酸化ケイ素層が前記ベース及び前記キャップに隣接するように、前記パターン形成された特徴を前記パターン形成された特徴の前記底部から充填する、
方法。 - 前記パターン形成された特徴内に酸化ケイ素層を選択的に堆積した後、前記選択的に堆積された酸化ケイ素層をアニールすることを更に含む、請求項1に記載の方法。
- 前記選択的に堆積された酸化ケイ素層をアニールした後、前記酸化ケイ素層を湿式エッチングすることを更に含む、請求項2に記載の方法。
- 前記オゾンは質量で10%から18%の割合で処理チャンバに流れ込む、請求項1に記載の方法。
- 動作中の処理チャンバ内の圧力は、200Torrから700Torrの間である、請求項1に記載の方法。
- パターン形成された特徴内に酸化ケイ素層を選択的に堆積する前に、前記パターン形成された特徴を窒素含有プラズマに曝露することを更に含む、請求項1に記載の方法。
- 前記パターン形成された特徴を窒素含有プラズマに曝露することは、窒素含有プラズマから形成されたイオンビームで前記パターン形成された特徴を指向性処理することを含む、請求項6に記載の方法。
- 基板上に酸化ケイ素層を選択的に形成する方法であって、
基板の表面上にパターン形成された特徴内に酸化ケイ素層を選択的に堆積することを含み、
前記パターン形成された特徴は、前記パターン形成された特徴の底部に堆積面及び一又は複数の側壁を含み、前記側壁の各々はベース及びキャップを有し、前記キャップは窒化ケイ素を含み、前記ベースは酸化ケイ素を含み、
前記堆積面は基本的にシリコンからなり、また、
前記選択的に堆積された酸化ケイ素層は、
前記選択的に堆積された酸化ケイ素層が前記ベース及び前記キャップに隣接するように、前記パターン形成された特徴を前記パターン形成された特徴の前記底部から充填するために、前記パターン形成された特徴の上にオルトケイ酸テトラエチル(TEOS)及びオゾンを流すことと、
前記パターン形成された特徴の前記選択的に堆積された酸化ケイ素層が各キャップから優先的にエッチングされて、各キャップに対応する各側壁の一部が露出され、前記ベースに沿った前記選択的に堆積された酸化ケイ素層がそのまま残るとともに、前記側壁のベースが露出されないままであるように、前記パターン形成された特徴を充填した後に、前記選択的に堆積された酸化ケイ素層をエッチングすることと、
前記選択的に堆積された酸化ケイ素層をエッチングした後に、前記パターン形成された特徴の上にオルトケイ酸テトラエチル(TEOS)及びオゾンを流すことを反復することと
によって前記堆積面上に形成される、方法。 - 前記基板の表面にパターン形成された特徴内に酸化ケイ素層を選択的に堆積した後、前記選択的に堆積された酸化ケイ素層をアニールすることを更に含む、請求項8に記載の方法。
- 前記選択的に堆積された酸化ケイ素層をアニールした後、前記酸化ケイ素層を湿式エッチングすることを更に含む、請求項8に記載の方法。
- 前記オゾンは質量で10%から18%の割合で処理チャンバに流れ込む、請求項8に記載の方法。
- 動作中の処理チャンバ内の圧力は、200Torrから700Torrの間である、請求項8に記載の方法。
- 基板の表面上にパターン形成された特徴内に酸化ケイ素層を選択的に堆積する前に、前記パターン形成された特徴の上に窒素含有プラズマを流すことを更に含む、請求項8に記載の方法。
- 前記パターン形成された特徴の上に窒素含有プラズマを流すことは、窒素含有プラズマで前記パターン形成された特徴を指向性処理することを含む、請求項13に記載の方法。
- 基板上に酸化ケイ素層を選択的に形成する方法であって、
基板の表面上にパターン形成された特徴内に酸化ケイ素層を選択的に堆積することを含み、
前記パターン形成された特徴は、前記パターン形成された特徴の底部に堆積面及び一又は複数の側壁を含み、前記側壁の各々はベース及びキャップを有し、
前記一又は複数の側壁のキャップは窒化ケイ素を含み、前記ベースは酸化ケイ素を含み、
前記キャップの第1の表面積は、前記側壁の表面積の少なくとも3分の1を含み、前記ベースの第2の表面積は、前記側壁の表面積の残りの部分であり、
前記堆積面は基本的にシリコンからなり、
前記選択的に堆積された酸化ケイ素層は、前記パターン形成された特徴の上にオルトケイ酸テトラエチル(TEOS)及びオゾンを流すことによって前記堆積面上に形成され、
前記方法は更に、
前記基板の表面上にパターン形成された特徴内に酸化ケイ素層を選択的に堆積した後、前記選択的に堆積された酸化ケイ素層をアニールすることを含む、方法。
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