JP2008544533A - 誘電体膜の形成方法及び該方法を実施するための新規な前駆体 - Google Patents
誘電体膜の形成方法及び該方法を実施するための新規な前駆体 Download PDFInfo
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- JP2008544533A JP2008544533A JP2008517551A JP2008517551A JP2008544533A JP 2008544533 A JP2008544533 A JP 2008544533A JP 2008517551 A JP2008517551 A JP 2008517551A JP 2008517551 A JP2008517551 A JP 2008517551A JP 2008544533 A JP2008544533 A JP 2008544533A
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- dielectric layer
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Abstract
【選択図】 図1
Description
− 第一のタイプの堆積又はFEOL堆積は、本質的に、電解効果トランジスタ型(感光性層の堆積、マスキング、紫外線露光、洗浄、製造されるトランジスタの種類に依存する単結晶層のドーピング、次いで電極の堆積、次いで各トランジスタのドレイン、ソース及びゲート領域における電気接点の堆積など)の活性成分を作るために多数の連続層を堆積させることにある;
− 第二のタイプの堆積又はBEOL堆積は、様々な電気接点、特に第一のタイプの堆積の様々な段階の間に製造される半導体の間の電気相互接続のネットワークを製造すること、またランダムアクセスメモリの製造の場合には特に、デジタル形態で情報を記録するために必要とされるコンデンサーを製造することにある。これら双方のタイプのアプリケーションにおいて、目的は本質的に、金属および/または導電層の堆積、これら導電層を分離する極めて低い誘電定数を有する誘電体層の堆積、及び、障壁層の堆積、特に、誘電性か導電性かを問わず、1又は2以上の下層がエッチングのために選択されることが望ましい液体化学薬品又は気体製品を用いてエッチングされる時、下層又は横方向への拡散を抑制するための障壁層の堆積にある。
一方でILD(層間絶縁膜)とも呼ばれる、回路の垂直方向において連続する2層の電気的接続を分離し、他方でIMD(金属間誘電体層)とも呼ばれる、回路のいずれか一つの水平面内にある金属相互連結を分離する誘電体層が、密接化された二つの接続ライン間の充分な電気絶縁性を提供するために、とりわけ相互接続回路の時定数を低減するために、誘電特性(さらに低い誘電定数)を改良したことが条件となる(時定数の容量分が誘電性のより低値を有すると、誘電体の誘電定数はより低く、高値を有すると、電極はより高密度になる)。
これら低k−SiOC層を堆積するために、二つの方法が提供される。すなわち、
− ジメチルジメトキシシラン(DMDMOS)、テトラメチルシラン(4MS)、テトラメチルシクロテトラシロキサン(TMCTS)、及びオクタメチルシクロテトラシロキサン(OMCTS)型:
− シロキサンを使用し、好適な溶媒中にメチルシルセスキオキサン(MSQ)又は水素シルセスキオキサンなどの膜を形成するスピン蒸着方法、である。
H、−CH3、又は一般的にアルキル基から選択され得、R1は、−O−CH3、又はより一般的に、アルコキシド又はアミンから選択される。R1の他の配位子は、Cl、Me又はHなどから選択され得る。
第一の工程は、以下の反応によるものであり、すべての分子に共通である。
Si2Cl6(又はポリクロロシランの混合物)+エチレン
→ Cl2Si−(CH=CH)2−SiCl2
アセチレン、ブタジエン、ベンゼン等は、この種の同じ原理による反応、すなわち、ジクロロシリレン:SiCl2がn個の結合と反応することを導く。一般に、すべての不飽和種が、この種の分子を合成する候補となる可能性を有する。
Cl2Si−(CH=CH)2−SiCl2+MeOH
→(MeO)2Si−(CH=CH)2−Si(MeO)2(式Iの分子において、R1=OMe);
Cl2Si−(CH=CH)2−SiCl2+LiAlH4 又はNaBH4
→ H2Si−(CH=CH)2−SiH2(式Iの分子において、R1=H);及び
Cl2Si−(CH=CH)2−SiCl2+スパイヤー(Speyer)触媒
→ Me2Si−(CH=CH)2−SiMe2(式Iの分子において、R1=Me)
この方法により、同様のフッ素化物(例えば、F2Si−(CH=CH)2−SiF2)も得ることができ、低k膜形成のために当該フッ素化物を使用することが可能となる。
停止層は、一般にはSiC又はSiN層である。
Claims (11)
- 特に集積回路の製造において、金属相互接続を分離するために使用され得る低k誘電体層であって、前記層が、SiCおよび/またはSiOCを含有し、少なくとも1つの−Si−Cn−Si−鎖(式中、n≧1)を含む少なくとも1つの前駆体から得られることを特徴とする、低k誘電体層。
- 少なくとも1つの前駆体が、アルコキシシリルアルカン(RiO)3(Si(−CRi 2)n−Si(ORi)3型(式中、各Ri基は、水素、又は炭素鎖(例えば、1〜5個、好ましくは1又は2個の炭素数を有するアルキル、アリールなどの種))から選択され得、
例えば、式(EtO)3Si−CH2−CH2−Si(OEt)3(式中、Et=C2H5)で表されるBTESE(ビス(トリエトキシシリル)エタン)であることを特徴とする、請求項1に記載の誘電体層。 - 少なくとも一つの前駆体が、Si−Cn−Si(式中、n≧1)結合を含む環状分子を含むことを特徴とする、請求項1に記載の誘電体層。
- 環状分子が式I(式中、R=H、及びR1=R2=−O−CH3である。)で表される二重DMDMOSであることを特徴とする、請求項4に記載の誘電体層。
- Rがアルキル基、好ましくはCH3、R1=−O−CH3であることを特徴とする、請求項4に記載の誘電体層。
- ケイ素原子と結合する炭素鎖に少なくとも一つの二重結合が含まれることを特徴とする、請求項1乃至6のいずれか1項に記載の誘電体層。
- 前駆体が蒸発して気化前駆体源を形成し、該気化前駆体源があらかじめ温度Tになっている基体が置かれている真空蒸着反応器に取り入れられ、所望される最終組成を有する誘電体層を形成することを特徴とする、請求項1乃至7のいずれか1項に記載の誘電体層の形成方法。
- 窒素および/または他の不活性ガスも反応器に注入されることを特徴とする、請求項9に記載の方法。
- 酸素もSiOCを形成するために反応器に注入されることを特徴とする、請求項9又は10に記載の方法。
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FR0551675A FR2887252A1 (fr) | 2005-06-21 | 2005-06-21 | Procede de formation d'un film dielectrique et nouveaux precurseurs pour la mise en oeuvre de ce procede |
FR0551675 | 2005-06-21 | ||
PCT/FR2006/001495 WO2006136741A1 (fr) | 2005-06-21 | 2006-06-21 | Procede de formation d'un film dielectrique et nouveaux precurseurs pour la mise en oeuvre de ce procede |
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JP2021184478A (ja) * | 2016-05-06 | 2021-12-02 | エーエスエム アイピー ホールディング ビー.ブイ. | SiOC薄膜の形成 |
WO2022085498A1 (ja) * | 2020-10-20 | 2022-04-28 | 東京エレクトロン株式会社 | 成膜方法及び成膜装置 |
US11776807B2 (en) | 2017-05-05 | 2023-10-03 | ASM IP Holding, B.V. | Plasma enhanced deposition processes for controlled formation of oxygen containing thin films |
US11996284B2 (en) | 2015-11-12 | 2024-05-28 | Asm Ip Holding B.V. | Formation of SiOCN thin films |
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CN102877041B (zh) * | 2011-07-14 | 2014-11-19 | 中国科学院微电子研究所 | 薄膜沉积方法以及半导体器件制造方法 |
US9960110B2 (en) * | 2011-12-30 | 2018-05-01 | Intel Corporation | Self-enclosed asymmetric interconnect structures |
US9243324B2 (en) | 2012-07-30 | 2016-01-26 | Air Products And Chemicals, Inc. | Methods of forming non-oxygen containing silicon-based films |
US9879340B2 (en) | 2014-11-03 | 2018-01-30 | Versum Materials Us, Llc | Silicon-based films and methods of forming the same |
US20170125241A1 (en) * | 2015-10-30 | 2017-05-04 | Applied Materials, Inc. | Low temp single precursor arc hard mask for multilayer patterning application |
JP7061432B2 (ja) * | 2017-02-16 | 2022-04-28 | レール・リキード-ソシエテ・アノニム・プール・レテュード・エ・レクスプロワタシオン・デ・プロセデ・ジョルジュ・クロード | Si含有膜の成膜方法 |
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US11996284B2 (en) | 2015-11-12 | 2024-05-28 | Asm Ip Holding B.V. | Formation of SiOCN thin films |
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JP7479334B2 (ja) | 2016-05-06 | 2024-05-08 | エーエスエム・アイピー・ホールディング・ベー・フェー | SiOC薄膜の形成 |
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JP5248316B2 (ja) | 2013-07-31 |
EP1896629A1 (fr) | 2008-03-12 |
EP1896629B1 (fr) | 2010-12-01 |
ATE490352T1 (de) | 2010-12-15 |
US20110275507A1 (en) | 2011-11-10 |
KR20080018959A (ko) | 2008-02-28 |
CN101203626A (zh) | 2008-06-18 |
KR101327640B1 (ko) | 2013-11-12 |
US20100130025A1 (en) | 2010-05-27 |
FR2887252A1 (fr) | 2006-12-22 |
DE602006018605D1 (de) | 2011-01-13 |
US7972975B2 (en) | 2011-07-05 |
WO2006136741A1 (fr) | 2006-12-28 |
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