JP4585510B2 - シャロートレンチアイソレーションプロセス - Google Patents
シャロートレンチアイソレーションプロセス Download PDFInfo
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- JP4585510B2 JP4585510B2 JP2006509191A JP2006509191A JP4585510B2 JP 4585510 B2 JP4585510 B2 JP 4585510B2 JP 2006509191 A JP2006509191 A JP 2006509191A JP 2006509191 A JP2006509191 A JP 2006509191A JP 4585510 B2 JP4585510 B2 JP 4585510B2
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/76—Making of isolation regions between components
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- H—ELECTRICITY
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
- H01L29/66568—Lateral single gate silicon transistors
- H01L29/66613—Lateral single gate silicon transistors with a gate recessing step, e.g. using local oxidation
- H01L29/66628—Lateral single gate silicon transistors with a gate recessing step, e.g. using local oxidation recessing the gate by forming single crystalline semiconductor material at the source or drain location
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- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
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- H01L21/76224—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers using trench refilling with dielectric materials
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- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
- H01L21/82—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components
- H01L21/822—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components the substrate being a semiconductor, using silicon technology
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- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
- H01L21/82—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components
- H01L21/822—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components the substrate being a semiconductor, using silicon technology
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- H01L21/8234—MIS technology, i.e. integration processes of field effect transistors of the conductor-insulator-semiconductor type
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- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
- H01L21/82—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components
- H01L21/822—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components the substrate being a semiconductor, using silicon technology
- H01L21/8232—Field-effect technology
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- H01L21/8238—Complementary field-effect transistors, e.g. CMOS
- H01L21/823878—Complementary field-effect transistors, e.g. CMOS isolation region manufacturing related aspects, e.g. to avoid interaction of isolation region with adjacent structure
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- H—ELECTRICITY
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- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
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- H01L29/76—Unipolar devices, e.g. field effect transistors
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Description
本出願は、2003年3月7日付けの米国仮特許出願第60/452794号の利益を主張するものであり、その開示内容全体は、参照により本出願に組み込まれている。
技術分野
本発明は、一般には半導体構造に関し、詳細にはシャロートレンチアイソレーションに関する。
トレンチ構造および別の歪み導入要素を設け、これにより、トランジスタのチャネル領域内に歪みを導入させる。この歪みによって、トランジスタ、特に活性エリアの寸法の小さなトランジスタの性能が向上する。
Claims (29)
- 半導体基板と、該基板上に設けられたシリコンゲルマニウム歪み層と、該基板の第1の領域上に設けられている第1のトランジスタと、前記基板の第2の領域上に設けられている第2のトランジスタとを含む構造であって、
該第1のトランジスタが、
前記基板の第1の領域に設けられた第1のソース領域および第1のドレイン領域と、
前記第1のソース領域と前記第1のドレイン領域との間に設けられていて、第1の種類の歪みを有している第1のチャネル領域と、
前記第1のチャネル領域上にかつ前記第1のソース領域と前記第1のドレイン領域との間に設けられていて、ドープ半導体、金属および金属化合物からなる群から選択される材料を含む第1のゲートと、
第1のトレンチ内に設けられている第1のトレンチ構造とを含んでおり、
前記第1のトレンチが、前記第1のソース領域および前記第1のドレイン領域の一方の少なくとも一方の側に隣接しており、
前記第1のチャネル領域の第1の種類の歪みの一部のみが、前記第1のトレンチ構造によって導入されており、
前記第1のトレンチ内に設けられている前記第1のトレンチ構造が、前記第1のトレンチのトレンチサイドウォールおよびトレンチ底部分を被覆する第1の誘電層と、前記第1の誘電層上にコンフォーマルに堆積された第1の保護ライナと、前記第1の保護ライナ上の前記第1のトレンチを充填する第1の充填材料とを含み、
前記第2のトランジスタが、
前記基板の第2の領域上に設けられた第2のソース領域および第2のドレイン領域と、
前記第2のソース領域と前記第2のドレイン領域との間に設けられていて、第2の種類の歪みを有している第2のチャネル領域と、
前記第2のチャネル領域上にかつ前記第2のソース領域と前記第2のドレイン領域との間に設けられていて、ドープ半導体、金属および金属化合物からなる群から選択される材料を含む第2のゲートと、
第2のトレンチ内に設けられている第2のトレンチ構造とを含んでおり、
前記第2のトレンチが、前記第2のソース領域および前記第2のドレイン領域の一方の少なくとも一方の側に隣接しており、
前記第2のチャネル領域内の第2の種類の歪みの一部のみが、前記第2のトレンチ構造によって導入されており、
前記第2のトレンチ内に設けられている前記第2のトレンチ構造が、前記第2のトレンチのトレンチサイドウォールおよびトレンチ底部分を被覆する第2の誘電層と、前記第2の誘電層上にコンフォーマルに堆積された第2の保護ライナと、前記第2の保護ライナ上の前記第2のトレンチを充填する第2の充填材料とを含み、
前記第1のチャネル領域の少なくとも一部および前記第2のチャネル領域の少なくとも一部が歪み層内に設けられており、
前記第1の誘電層および前記第2の誘電層が、1000℃より低い温度での湿式の酸化またはCVD法によって形成されている、構造。 - 前記第1の誘電層と前記第1の保護ライナが異なる種類の歪みを有していて、前記第2の誘電層と前記第2の保護ライナが異なる種類の歪みを有している、請求項1に記載の構造。
- 前記基板上に設けられた誘電層をさらに含み、前記歪み層が、該誘電層上に設けられかつ当該誘電層と接触している、請求項1に記載の構造。
- 前記第1の種類の歪みと前記第2の種類の歪みが異なる、請求項1に記載の構造。
- 前記第1の種類の歪みが引張り歪みであり、前記第2の種類の歪みが圧縮歪みである、請求項1に記載の構造。
- 前記第1の種類の歪みが圧縮歪みであり、前記第2の種類の歪みが引張り歪みである、請求項1に記載の構造。
- 前記基板が、シリコンおよびゲルマニウムの少なくとも一方を含む、請求項1に記載の構造。
- 前記基板が、シリコン以外の少なくとも1つの元素を含むシリコン基板である、請求項1に記載の構造。
- 前記シリコン以外の元素がゲルマニウムである、請求項8に記載の構造。
- 前記第1または第2のトランジスタの表面上に設けられたキャップ層をさらに含み、前記第1または第2の種類の歪みが、当該キャップ層によって導入される、請求項1に記載の構造。
- 前記キャップ層が窒化シリコンを含む、請求項10に記載の構造。
- 前記第1のソース領域および前記第1のドレイン領域の少なくとも一方、または、前記第2のソース領域および前記第2のドレイン領域の少なくとも一方が、金属−半導体アロイを含み、前記第1または第2のチャネル領域内の歪みが、当該金属−半導体アロイによって導入される、請求項1に記載の構造。
- 前記第1の種類の歪みは、前記第1のトランジスタの前記第1のソース領域と前記第1のドレイン領域のそれぞれに隣接し、かつ、前記第1のソース領域及び前記第1のドレイン領域よりも大きな格子定数を有する半導体材料である第1の材料によって導入され、
前記第2の種類の歪みは、前記第2のトランジスタの前記第2のソース領域と前記第2のドレイン領域のそれぞれに隣接し、かつ、前記第2のソース領域及び前記第2のドレイン領域よりも大きな格子定数を有する半導体材料である第2の材料によって導入される、請求項1に記載の構造。 - 前記第1の材料が、前記第1のソース領域及び前記第1のドレイン領域よりもGe含有量が高いSiGe、およびGeからなる群から選択される材料を含み、
前記第2の材料が、前記第2のソース領域及び前記第2のドレイン領域よりもGe含有量が高いSiGe、およびGeからなる群から選択される材料を含む、請求項13に記載の構造。 - 前記第1の種類の歪みは、前記第1のトランジスタの前記第1のソース領域と前記第1のドレイン領域のそれぞれに隣接し、かつ、前記第1のソース領域及び前記第1のドレイン領域よりも小さな格子定数を有する半導体材料である第1の材料によって導入され、
前記第2の種類の歪みは、前記第2のトランジスタの前記第2のソース領域と前記第2のドレイン領域のそれぞれに隣接し、かつ、前記第2のソース領域及び前記第2のドレイン領域よりも小さな格子定数を有する半導体材料である第2の材料によって導入される、請求項1に記載の構造。 - 前記第1の材料が、前記第1のソース領域及び前記第1のドレイン領域よりもGe含有量が低いSiGe、Si、SiCからなる群から選択される材料を含み、
前記第2の材料が、前記第2のソース領域及び前記第2のドレイン領域よりもGe含有量が低いSiGe、Si、SiCからなる群から選択される材料を含む、請求項15に記載の構造。 - 前記第1の種類の歪みが第1のゲートによって導入され、前記第2の種類の歪みが第2のゲートによって導入される、請求項1に記載の構造。
- 前記第1および第2のゲートが、金属シリサイド、金属ゲルマノシリサイドおよび金属ゲルマノサイドからなる群から選択される材料を含む、請求項17に記載の構造。
- 前記第1および第2のトランジスタがチップ内に設けられており、前記構造が、前記チップを収容するパッケージをさらに含み、該パッケージが、前記第1または第2のチャネル領域内に歪みを導入する、請求項1に記載の構造。
- 半導体構造を形成する方法であって、
半導体基板を準備し、該基板上にシリコンゲルマニウム歪み層が設けられており、
前記基板の第1の部分内に、第1のソース領域および第1のドレイン領域を画定し、前記第1のソース領域と前記第1のドレイン領域との間に、第1の種類の歪みを有する第1のチャネル領域を画定し、前記第1のチャネル領域上にかつ前記第1のソース領域と前記第1のドレイン領域との間に、ドープ半導体、金属および金属化合物からなる群から選択される材料を含む第1のゲートを形成し、前記第1のソース領域および前記第1のドレイン領域の一方の少なくとも一方の側に隣接させて第1のトレンチ構造を形成することによって、前記基板の第1の領域上に第1のトランジスタを形成し、
前記第1のトレンチ構造の形成が、該第1のトレンチ構造を形成する領域に第1のトレンチを形成し、該第1のトレンチのトレンチサイドウォールおよびトレンチ底部分を第1の誘電層で被覆し、前記第1の誘電層上に第1の保護ライナをコンフォーマルに堆積し、前記第1のトレンチを第1の充填材料で充填することを含み、
前記基板の第2の部分内に、第2のソース領域および第2のドレイン領域を画定し、前記第2のソース領域と前記第2のドレイン領域との間に、第2の種類の歪みを有する第2のチャネル領域を画定し、前記第2のチャネル領域上にかつ前記第2のソース領域と前記第2のドレイン領域との間に、ドープ半導体、金属および金属化合物からなる群から選択される材料を含む第2のゲートを形成し、前記第2のソース領域および前記第2のドレイン領域の一方の少なくとも一方の側に隣接させて第2のトレンチ構造を形成することによって、前記基板の第2の領域上に第2のトランジスタを形成し、
前記第2のトレンチ構造の形成が、該第2のトレンチ構造を形成する領域に第2のトレンチを形成し、前記第2のトレンチのトレンチサイドウォールおよびトレンチ底部分を第2の誘電層で被覆し、前記第2の誘電層上に第2の保護ライナをコンフォーマルに堆積し、前記第2のトレンチを第2の充填材料で充填することを含み、
前記第1のトレンチ構造を、前記第1のチャネル領域内に第1の種類の歪みの一部のみを導入するように調整し、
前記第2のトレンチ構造を、前記第2のチャネル領域内に第2の種類の歪みの一部のみを導入するように調整し、
前記第1のチャネル領域の少なくとも一部および前記第2のチャネル領域の少なくとも一部が歪み層内に設けられており、
前記第1の誘電層および前記第2の誘電層を、1000℃より低い温度での湿式の酸化またはCVD法によって形成する、方法。 - 前記第1の誘電層と前記第1の保護ライナが異なる種類の歪みを有していて、前記第2の誘電層と前記第2の保護ライナが異なる種類の歪みを有している、請求項20に記載の方法。
- 前記第1の種類と第2の種類の歪みが異なる、請求項20に記載の方法。
- 前記第1または第2のトランジスタの表面上にキャップ層を形成することをさらに含み、該キャップ層が、前記第1のチャネル領域内に前記第1の種類の歪みを導入するように調整されるか、または、前記第2のチャネル領域内に前記第2の種類の歪みを導入するように調整される、請求項20に記載の方法。
- 前記第1のトランジスタの形成が、前記第1のトランジスタの前記第1のソース領域に隣接する領域と前記第1のドレイン領域に隣接する領域の各々に、前記第1のソース領域及び前記第1のドレイン領域よりも格子定数が大きな半導体材料を設けることによって、前記第1の種類の歪みの少なくとも一部を導入することを含み、
前記第2のトランジスタの形成が、前記第2のトランジスタの前記第2のソース領域に隣接する領域と前記第2のドレイン領域に隣接する領域の各々に、前記第2のソース領域及び前記第2のドレイン領域よりも格子定数が大きな半導体材料を設けることによって、前記第2の種類の歪みの少なくとも一部を導入することを含む、請求項20に記載の方法。 - 前記第1のトランジスタの形成が、前記第1のトランジスタの前記第1のソース領域に隣接する領域と前記第1のドレイン領域に隣接する領域の各々に、前記第1のソース領域及び前記第1のドレイン領域よりも格子定数が小さな半導体材料を設けることによって、前記第1の種類の歪みの少なくとも一部を導入することを含み、
前記第2のトランジスタの形成が、前記第2のトランジスタの前記第2のソース領域に隣接する領域と前記第2のドレイン領域に隣接する領域の各々に、前記第2のソース領域及び前記第2のドレイン領域よりも格子定数が小さな半導体材料を設けることによって、前記第2の種類の歪みの少なくとも一部を導入することを含む、請求項20に記載の方法。 - 金属−半導体アロイを、前記第1のソース領域および前記第1のドレイン領域の少なくとも一方、または、前記第2のソース領域および前記第2のドレイン領域の少なくとも一方の上に形成することをさらに含み、該金属−半導体アロイは、前記第1のチャネル領域内に前記第1の種類の歪みを導入するように調整されているか、または、前記第2のチャネル領域内に前記第2の種類の歪みを導入するように調整されている、請求項20に記載の方法。
- 前記第1のゲートの形成が、該第1のゲート上に被覆層を堆積させ、当該第1のゲートをアニールして、前記第1の種類の歪みの少なくとも一部が、前記第1のゲートによって導入されようにすることを含み、
前記第2のゲートの形成が、該第2のゲート上に被覆層を堆積させ、当該第2のゲートをアニールして、前記第2の種類の歪みの少なくとも一部が、前記第2のゲートによって導入されるようにすることを含む、請求項20に記載の方法。 - 前記第1のゲートの形成が、前記基板上に多結晶半導体層を形成し、該多結晶シリコン半導体層と金属とを、前記第1のゲートが金属と半導体層との合金から構成されるように反応させて、前記第1の種類の歪みの少なくとも一部が、前記第1のゲートによって導入されるようにすることを含み、
前記第2のゲートの形成が、前記基板上に多結晶半導体層を形成し、該多結晶シリコン半導体層と金属とを、前記第2のゲートが金属と半導体層との合金から構成されるように反応させて、前記第2の種類の歪みの少なくとも一部が、前記第2のゲートによって導入されるようにすることを含む、請求項20に記載の方法。 - 前記第1および第2のトランジスタがチップ内に設けられており、
前記チップをパッケージに取り付けることをさらに含み、
前記第1または第2の種類の歪みの少なくとも一部が、前記パッケージによって導入される、請求項20に記載の方法。
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US20050205859A1 (en) | 2005-09-22 |
JP2011009760A (ja) | 2011-01-13 |
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EP1602125A2 (en) | 2005-12-07 |
JP5508982B2 (ja) | 2014-06-04 |
CN1774799A (zh) | 2006-05-17 |
JP2006521026A (ja) | 2006-09-14 |
KR20050115894A (ko) | 2005-12-08 |
US6960781B2 (en) | 2005-11-01 |
WO2004081982A2 (en) | 2004-09-23 |
WO2004081982A3 (en) | 2004-12-16 |
EP1602125B1 (en) | 2019-06-26 |
US7504704B2 (en) | 2009-03-17 |
CN100437970C (zh) | 2008-11-26 |
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