JP2018048113A - アルミニウム化合物、及びそれを利用した薄膜形成方法、並びに集積回路素子の製造方法 - Google Patents
アルミニウム化合物、及びそれを利用した薄膜形成方法、並びに集積回路素子の製造方法 Download PDFInfo
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- JP2018048113A JP2018048113A JP2017159059A JP2017159059A JP2018048113A JP 2018048113 A JP2018048113 A JP 2018048113A JP 2017159059 A JP2017159059 A JP 2017159059A JP 2017159059 A JP2017159059 A JP 2017159059A JP 2018048113 A JP2018048113 A JP 2018048113A
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- aluminum
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- aluminum compound
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Links
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- 238000000034 method Methods 0.000 title claims abstract description 145
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 58
- 239000000126 substance Substances 0.000 claims abstract description 31
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- 125000000217 alkyl group Chemical group 0.000 claims abstract description 10
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- 125000003342 alkenyl group Chemical group 0.000 claims abstract description 7
- 125000000304 alkynyl group Chemical group 0.000 claims abstract description 7
- 125000005843 halogen group Chemical group 0.000 claims abstract description 7
- 125000002723 alicyclic group Chemical group 0.000 claims abstract description 6
- 125000003118 aryl group Chemical group 0.000 claims abstract description 6
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 57
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 42
- 239000007789 gas Substances 0.000 claims description 41
- 238000005530 etching Methods 0.000 claims description 17
- 238000000137 annealing Methods 0.000 claims description 10
- 125000006701 (C1-C7) alkyl group Chemical group 0.000 claims description 9
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 claims description 9
- 125000004432 carbon atom Chemical group C* 0.000 claims description 8
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- 238000001179 sorption measurement Methods 0.000 claims description 6
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- BDAGIHXWWSANSR-UHFFFAOYSA-N Formic acid Chemical compound OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 3
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- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 3
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- 230000008569 process Effects 0.000 abstract description 80
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- 239000012535 impurity Substances 0.000 description 8
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- 125000006850 spacer group Chemical group 0.000 description 7
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- 238000000113 differential scanning calorimetry Methods 0.000 description 5
- 229910021332 silicide Inorganic materials 0.000 description 5
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- 0 C[C@]1C(*)N(*)C(*)C(*)C(*)[Al](*)C(*)C1* Chemical compound C[C@]1C(*)N(*)C(*)C(*)C(*)[Al](*)C(*)C1* 0.000 description 2
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- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 2
- 229910004166 TaN Inorganic materials 0.000 description 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 2
- 150000004770 chalcogenides Chemical class 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
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- 125000006165 cyclic alkyl group Chemical group 0.000 description 2
- 238000000921 elemental analysis Methods 0.000 description 2
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- 239000002904 solvent Substances 0.000 description 2
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- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
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- ITWBWJFEJCHKSN-UHFFFAOYSA-N 1,4,7-triazonane Chemical compound C1CNCCNCCN1 ITWBWJFEJCHKSN-UHFFFAOYSA-N 0.000 description 1
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- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 1
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- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
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- 230000000630 rising effect Effects 0.000 description 1
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Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
- H01L21/02112—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer
- H01L21/02172—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides
- H01L21/02175—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides characterised by the metal
- H01L21/02178—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides characterised by the metal the material containing aluminium, e.g. Al2O3
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F5/00—Compounds containing elements of Groups 3 or 13 of the Periodic Table
- C07F5/06—Aluminium compounds
- C07F5/061—Aluminium compounds with C-aluminium linkage
- C07F5/062—Al linked exclusively to C
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F5/00—Compounds containing elements of Groups 3 or 13 of the Periodic Table
- C07F5/06—Aluminium compounds
- C07F5/061—Aluminium compounds with C-aluminium linkage
- C07F5/064—Aluminium compounds with C-aluminium linkage compounds with an Al-Halogen linkage
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F5/00—Compounds containing elements of Groups 3 or 13 of the Periodic Table
- C07F5/06—Aluminium compounds
- C07F5/061—Aluminium compounds with C-aluminium linkage
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Abstract
Description
本発明が解決しようとする他の技術的課題は、優秀な段差被覆性、工程安定性、及び量産性を提供できるアルミニウム含有薄膜形成方法と、優秀な電気的特性を提供できる集積回路素子の製造方法とを提供することである。
本発明の技術的思想による一様態による集積回路素子の製造方法においては、基板上に下部構造物を形成し、前記化学式Iのアルミニウム化合物を使用して、300乃至600℃の温度下で、前記下部構造物上にアルミニウム含有膜を形成する。
このとき、アルミニウム前駆体として使用されるアルミニウム化合物の熱安定性が低い場合、比較的高温、例えば、約400℃以上の温度でALD工程を遂行する間、アルミニウム化合物が熱分解される場合がある。その結果、ALDに必要な自己制限的反応(self−limiting reaction)の代わりに、CVD(chemical vapor deposition)反応が主に起きる。それにより、所望の膜特性を有するアルミニウム酸化物が得られなくなる。かような問題を防止するために、ALD工程時の温度を低く設定する場合、不純物の無い良質薄膜特性、及び高い縦横比(aspect ratio)で要求される段差被覆(step coverage)特性を満足させることができない。
例えば、本発明の技術的思想によるアルミニウム化合物は、化学式IIIで表示される。
一実施例において、前記アルミニウム含有膜を形成するために、前記アルミニウム化合物が単独で基板上に供給される。他の一実施例において、前記アルミニウム含有膜を形成するために、アルミニウムとは異なる金属を含む前駆体化合物、反応性ガス、及び有機溶剤のうち少なくとも一つと、前記アルミニウム化合物との混合物からなる多成分原料を基板上に供給する。前記供給ガスが反応チャンバ内部で1回供給される時間は、約0.1秒乃至約100秒間維持される。
それは、もしもアルミニウム酸化膜(136)をアニーリングして稠密化しない場合、図9の工程において、複数の絶縁層126各々の側壁が露出されるようにブロッキング絶縁膜136の一部及びゲート電極164用導電層の一部を除去する間に、ブロッキング絶縁膜136がエッチング雰囲気に過多に露出されて過剰に消耗するか、又は、複数のゲート空間GSの入口側において、ブロッキング絶縁膜136がエッチング雰囲気によって、所望よりも過剰に除去されてしまう、からである。
高抵抗状態を「0」で、低抵抗状態を「1」と定義することにより、可変抵抗層554にデータが保存される。可変抵抗層554は、例えば相変化物質として、カルコゲナイド物質を含む。例えば、可変抵抗層554は、Ge−Sb−Te(GST)を含む。可変抵抗層554は、ホウ素(B)、炭素(C)、窒素(N)、酸素(O)、リン(P)及び硫黄(S)のうちから選択された少なくとも1つの不純物を更に含み得る。前記不純物によって、集積回路素子500の駆動電流を変更できる。また、可変抵抗層554は、金属を更に含み得る。可変抵抗層554が遷移金属酸化物を含む場合、集積回路素子500は、ReRAM(resistive RAM)になり得る。
110 基板
122 エッチング停止用絶縁膜
P124 犠牲層
126 絶縁層
130 チャネルホール
132、132A、132B、132C 電荷保存膜
134、134A、134B、134C トンネル絶縁膜
136、136A、136B、136C ブロッキング絶縁膜、アルミニウム酸化膜
138、138A、138B、138C ゲート誘電膜
140 チャネル領域
142 絶縁膜
150 導電パターン
160 開口
164 ゲート電極
168 共通ソース領域
172 絶縁スペーサ
174 導電性プラグ
182 第1コンタクト
184 第1導電層
192 第2コンタクト
194 ビットライン
200 集積回路素子
212 素子分離領域
220 層間絶縁膜
224 導電領域
228 絶縁層
228P 絶縁層パターン
230 モールド膜
230P モールド膜パターン
242 犠牲膜
242P 犠牲膜パターン
244 マスクパターン
250 下部電極形成用導電膜
260 誘電膜
270 キャパシタ
300 集積回路素子
312 導電パターン
314 層間誘電層パターン
314H ホール
320 導電性バリア膜
330 配線層
400 集積回路素子
402 素子分離膜
412 インタフェース層
414 高誘電膜
420 ゲート構造体
420G ゲート電極
426A 第1金属含有層
426B 第2金属含有層
428 ギャップフィル金属層
430 ソース/ドレイン領域
442 絶縁スペーサ
444 層間絶縁膜
500 集積回路素子
502 層間絶縁膜
510 第1電極ライン
520 第2電極ライン
542 下部電極層
544 選択素子層
546 中間電極層
552 加熱電極層
554 可変抵抗層
556 上部電極層
572 第1絶縁層
574 第2絶縁層
576 第3絶縁層
AC 活性領域
FA フィン型活性領域
GS ゲート空間
H1 ホール
LE 下部電極
MC メモリセル
TR MOSトランジスタ
UE 上部電極
Claims (25)
- 熱分解温度が350乃至550℃であることを特徴とする請求項1に記載のアルミニウム化合物。
- R1及びR5は、各々独立して、C1−C7アルキル基であり、
R2、R3、R4、R6、R7、及びR8は、各々独立して、水素原子又はC1−C7アルキル基であることを特徴とする請求項1に記載のアルミニウム化合物。 - 前記アルミニウム化合物は、熱分解温度が350乃至550℃であることを特徴とする請求項6に記載の薄膜形成方法。
- 前記アルミニウム含有膜を形成する段階は、300乃至600℃の温度下で遂行されることを特徴とする請求項6に記載の薄膜形成方法。
- 前記アルミニウム含有膜を形成する段階は、
前記基板上に、前記アルミニウム化合物及び反応性ガスを同時に又は順次に供給する段階を含むことを特徴とする請求項6に記載の薄膜形成方法。 - 前記反応性ガスは、NH3、モノアルキルアミン、ジアルキルアミン、トリアルキルアミン、有機アミン化合物、ヒドラジン化合物、及びそれらの組み合わせのうちから選択されることを特徴とする請求項10に記載の薄膜形成方法。
- 前記反応性ガスは、O2、O3、プラズマO2、H2O、NO2、NO、N2O(nitrous oxide)、CO2、H2O2、HCOOH、CH3COOH、(CH3CO)2O、及びそれらの組み合わせのうちから選択されることを特徴とする請求項10に記載の薄膜形成方法。
- 前記アルミニウム含有膜を形成する段階は、
前記アルミニウム化合物を含むソースガスを気化させる段階と、
前記気化されたソースガスを、前記基板上に供給し、前記基板上にAlソース吸着層を形成する段階と、
前記Alソース吸着層上に反応性ガスを供給する段階と、を含むことを特徴とする請求項6に記載の薄膜形成方法。 - 前記アルミニウム含有膜は、酸化アルミニウム膜、窒化アルミニウム膜、炭素を含むアルミニウム合金膜、又は窒素を含むアルミニウム合金膜であることを特徴とする請求項6に記載の薄膜形成方法。
- 前記アルミニウム化合物は、熱分解温度が350乃至550℃であることを特徴とする請求項15に記載の集積回路素子の製造方法。
- 前記アルミニウム含有膜を形成する段階は、前記下部構造物上に、酸化アルミニウム膜、窒化アルミニウム膜、炭素を含むアルミニウム合金膜、又は窒素を含むアルミニウム合金膜を形成する段階を含むことを特徴とする請求項15に記載の集積回路素子の製造方法。
- 前記下部構造物を形成する段階は、
前記基板上に、前記基板と平行に延長される複数の絶縁層と、複数の犠牲層とを相互に1層積層する段階と、
前記複数の犠牲層、及び複数の絶縁層を貫通する開口を形成する段階と、
前記開口を介して、前記複数の犠牲層を除去し、前記複数の絶縁層各々の間に一つずつ配置される複数のゲート空間を設ける段階と、を含み、
前記アルミニウム含有膜を形成する段階は、
300乃至600℃の範囲内で選択される第1温度下で、前記開口を介して、前記複数のゲート空間に、前記アルミニウム化合物を供給し、前記複数のゲート空間内に、アルミニウム酸化膜を形成する段階を含むことを特徴とする請求項15に記載の集積回路素子の製造方法。 - 前記アルミニウム酸化膜を形成した後、前記第1温度より高い第2温度下で、前記アルミニウム酸化膜をアニーリングし、前記アルミニウム酸化膜を稠密化する段階を更に含むことを特徴とする請求項19に記載の集積回路素子の製造方法。
- 前記アルミニウム酸化膜を形成した後、前記アルミニウム酸化膜上で、前記複数のゲート空間を充填する複数のゲート電極を形成する段階を含むことを特徴とする請求項19に記載の集積回路素子の製造方法。
- 前記基板上に、下部電極、誘電膜及び上部電極を含むキャパシタを形成する段階を更に含み、
前記下部構造物を形成する段階は、前記基板上に、前記下部電極を形成する段階を含み、
前記アルミニウム含有膜を形成する段階は、前記誘電膜を形成するために、前記下部電極の表面を覆うアルミニウム酸化膜を形成する段階を含むことを特徴とする請求項15に記載の集積回路素子の製造方法。 - 前記下部構造物を形成する段階は、
前記基板の一部をエッチングし、前記基板から上部に突出するフィン型活性領域を形成する段階と、
前記フィン型活性領域の上に高誘電膜を形成する段階と、を含み、
前記アルミニウム含有膜を形成する段階は、
前記アルミニウム化合物と、アルミニウムではない他の金属を含む金属化合物とを使用して、前記高誘電膜を挟み、前記フィン型活性領域の上面及び両側壁を覆う金属含有層を形成する段階を含み、
前記金属含有層は、TiAlC、TiAlCN、TaAlC、TaAlCN、TiAl、TiAlN、TaAlN、又はそれらの組み合わせを含むことを特徴とする請求項15に記載の集積回路素子の製造方法。 - 前記基板上で、前記基板の上面に平行な第1方向に延長される複数の第1電極ラインと、前記複数の第1電極ライン上で、前記基板の上面に平行であり、前記第1方向と異なる第2方向に延長される複数の第2電極ラインと、前記複数の第1電極ラインと前記複数の第2電極ラインとの間で、前記複数の第1電極ラインと前記複数の第2電極ラインとが交差する部分に配置される複数の可変抵抗メモリセルと、を含むメモリ素子を製造する段階を更に含み、
前記アルミニウム含有膜を形成する段階は、前記アルミニウム化合物を使用して、前記複数の第1電極ライン、又は前記複数の第2電極ラインを形成する段階を含むことを特徴とする請求項15に記載の集積回路素子の製造方法。 - 前記アルミニウム含有膜は、Al、TiAlN、又はそれらの組み合わせを含むことを特徴とする請求項24に記載の集積回路素子の製造方法。
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US10224200B2 (en) | 2019-03-05 |
TWI731109B (zh) | 2021-06-21 |
KR20180029736A (ko) | 2018-03-21 |
JP7140476B2 (ja) | 2022-09-21 |
KR102627458B1 (ko) | 2024-01-19 |
TW201829430A (zh) | 2018-08-16 |
CN107814817A (zh) | 2018-03-20 |
US20180076024A1 (en) | 2018-03-15 |
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