JP4886021B2 - 半導体装置及びその製造方法 - Google Patents
半導体装置及びその製造方法 Download PDFInfo
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- JP4886021B2 JP4886021B2 JP2009261744A JP2009261744A JP4886021B2 JP 4886021 B2 JP4886021 B2 JP 4886021B2 JP 2009261744 A JP2009261744 A JP 2009261744A JP 2009261744 A JP2009261744 A JP 2009261744A JP 4886021 B2 JP4886021 B2 JP 4886021B2
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- polysilazane
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Description
[変形例1]
[変形例2]
[変形例3]
[変形例4]
[変形例5]
[変形例6]
2,452 STI領域
3 ワード線(ゲート電極)
4,5,102,230 セルコンタクト
6,106,237,416 ビット線
10,210,225,241,306,410,452b,457 SiON膜(ライナー膜)
11,205,212,227,232,243,244,307,308,309,410,406,411,452a シリコン酸化膜
100,200,400 半導体装置
101,104,246,250,412,414,454,458 層間絶縁膜
103 コバルト膜
105 ビットコンタクト
107,207,238,220 キャップ絶縁膜
108,222,239,409,453d サイドウォール絶縁膜
109,223,240,417 溝状領域
201,301,401,451 シリコン基板
202 パッド酸化膜
203,218,236,244,303 シリコン窒化膜
204,231,304 開口
208 側壁酸化膜
209,305
209a,209b 溝
211,226,242,308,310 ポリシラザン
213 シリコン窒化膜
214 ゲートトレンチ
215 ゲート酸化膜
216,229 DOPOS膜
217,235 金属膜
219,408 ゲート電極
221,404 LDD層
224 エピタキシャルシリコン層(ソース/ドレイン領域)
228 セルコンタクトホール
233 高融点金属シリサイド膜
234 ビットコンタクト
245,413 容量コンタクト
247 下部電極
248 容量絶縁膜
249 プレート電極
402 シリコンピラー
403 ゲート絶縁膜
405,407,453e 拡散層
415 キャパシタ
450 半導体装置
453,456,460 配線層
453a ゲート絶縁膜
453b ゲート電極
453c,456b 絶縁膜
455a,455b,459a コンタクトプラグ
456a,460a,G1〜G5 配線
460b 窒化チタン
461 積層膜
501,504 層間絶縁膜
502 セルコンタクト
503 金属シリサイド膜
505 ビットコンタクト
506 ビット線
507 キャップ絶縁膜
508 サイドウォール絶縁膜
509,602 シリコン酸化膜
510,604 ボイド
601 シリコン窒化膜(ライナー膜)
603 溝状領域
Claims (14)
- 溝状領域を設ける第1の工程と、
N(窒素)よりもO(酸素)を多く含むSiON膜を前記溝状領域の内表面を連続的に覆うように形成する第2の工程と、
前記SiON膜を介して前記溝状領域内にポリシラザンを埋め込む第3の工程と、
スチーム雰囲気中でアニールを行うことにより、前記ポリシラザンをシリコン酸化膜に改質する第4の工程とを備えることを特徴とする半導体装置の製造方法。 - 前記SiON膜中の前記Nの含有率は10〜20atom%であることを特徴とする請求項1に記載の半導体装置の製造方法。
- 前記SiON膜において、前記Nに対する前記Oの原子数比が2.2〜5.5であることを特徴とする請求項1又は2に記載の半導体装置の製造方法。
- 前記溝状領域は隣接するゲート電極間の溝状領域、隣接するビット線間の溝状領域及び隣接するシリコンピラーの側面それぞれを覆う隣接するゲート電極間の溝状領域のいずれかであることを特徴とする請求項1乃至3のいずれか一項に記載の半導体装置の製造方法。
- 前記溝状領域はシリコン基板に設けられたSTI(Shallow Trench Isolation)用のトレンチであることを特徴とする請求項1乃至3のいずれか一項に記載の半導体装置の製造方法。
- 前記トレンチは下部に位置する第1のトレンチと前記第1のトレンチ上に前記第1のトレンチと一体化し前記第1のトレンチよりも幅の広い第2のトレンチとを備え、前記第1のトレンチは前記SiON膜で充填されていることを特徴とする請求項5に記載の半導体装置の製造方法。
- 前記第3及び第4の工程は、第1のポリシラザンを前記溝状領域の所定の深さまで埋め込んだ後、スチーム雰囲気中でアニールを行うことにより該第1のポリシラザンをシリコン酸化膜に改質する第1のステップと、第2のポリシラザンを前記溝状領域の残りの部分に埋め込んだ後、スチーム雰囲気中でアニールを行うことにより該第2のポリシラザンをシリコン酸化膜に改質する第2のステップを含むことを特徴とする請求項1乃至5のいずれか一項に記載の半導体装置の製造方法。
- 前記SiON膜をALD法により形成することを特徴とする請求項1乃至7のいずれか一項に記載の半導体装置の製造方法。
- 前記ALD法において、1サイクル中にSiを4原子層分、Oを3原子層分、Nを1原子層分堆積させることを特徴とする請求項8に記載の半導体装置の製造方法。
- 前記第2の工程を行った後、前記第3の工程を行う前に、酸素プラズマ処理を行う酸素プラズマ処理工程をさらに備えることを特徴とする請求項1乃至9のいずれか一項に記載の半導体装置の製造方法。
- 前記第2の工程を行った後、前記酸素プラズマ処理工程を行う前に、水を用いて洗浄を行う洗浄工程をさらに備えることを特徴とする請求項10に記載の半導体装置の製造方法。
- 前記溝状領域のアスペクト比が10〜15であることを特徴とする請求項10又は11に記載の半導体装置の製造方法。
- 前記酸素プラズマ処理工程は、200から300℃の温度で行うことを特徴とする請求項10乃至12のいずれか一項に記載の半導体装置の製造方法。
- 前記酸素プラズマ処理工程は、0.1〜10Torrの圧力で行うことを特徴とする請求項10乃至13のいずれか一項に記載の半導体装置の製造方法。
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JP4018596B2 (ja) | 2002-10-02 | 2007-12-05 | 株式会社東芝 | 半導体装置の製造方法 |
JP3987418B2 (ja) * | 2002-11-15 | 2007-10-10 | 株式会社東芝 | 半導体記憶装置 |
KR100645458B1 (ko) * | 2003-10-02 | 2006-11-13 | 주식회사 하이닉스반도체 | 습식 세정에 의한 어택을 방지할 수 있는 반도체 장치제조 방법 |
KR100571658B1 (ko) * | 2003-11-21 | 2006-04-17 | 주식회사 하이닉스반도체 | 반도체소자 제조 방법 |
US7118987B2 (en) * | 2004-01-29 | 2006-10-10 | Taiwan Semiconductor Manufacturing Co., Ltd. | Method of achieving improved STI gap fill with reduced stress |
JP2005347636A (ja) | 2004-06-04 | 2005-12-15 | Az Electronic Materials Kk | トレンチ・アイソレーション構造の形成方法 |
JP5110783B2 (ja) * | 2004-10-28 | 2012-12-26 | ルネサスエレクトロニクス株式会社 | 半導体装置 |
JP2007019145A (ja) * | 2005-07-06 | 2007-01-25 | Tokyo Electron Ltd | シリコン酸窒化膜の形成方法、シリコン酸窒化膜の形成装置及びプログラム |
JP2008288263A (ja) * | 2007-05-15 | 2008-11-27 | Toshiba Corp | 半導体装置の製造方法 |
US20090096055A1 (en) * | 2007-10-16 | 2009-04-16 | Texas Instruments Incorporated | Method to form cmos circuits with sub 50nm sti structures using selective epitaxial silicon post sti etch |
-
2009
- 2009-11-17 JP JP2009261744A patent/JP4886021B2/ja not_active Expired - Fee Related
- 2009-12-15 KR KR1020090124948A patent/KR20100069616A/ko active Search and Examination
- 2009-12-16 US US12/639,450 patent/US8154102B2/en not_active Expired - Fee Related
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US20120164816A1 (en) | 2012-06-28 |
US20100148301A1 (en) | 2010-06-17 |
US8154102B2 (en) | 2012-04-10 |
US8603892B2 (en) | 2013-12-10 |
JP2010166026A (ja) | 2010-07-29 |
KR20100069616A (ko) | 2010-06-24 |
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