JP5316962B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP5316962B2 JP5316962B2 JP2010156621A JP2010156621A JP5316962B2 JP 5316962 B2 JP5316962 B2 JP 5316962B2 JP 2010156621 A JP2010156621 A JP 2010156621A JP 2010156621 A JP2010156621 A JP 2010156621A JP 5316962 B2 JP5316962 B2 JP 5316962B2
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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
- H01L21/8234—MIS technology, i.e. integration processes of field effect transistors of the conductor-insulator-semiconductor type
- H01L21/8238—Complementary field-effect transistors, e.g. CMOS
- H01L21/823828—Complementary field-effect transistors, e.g. CMOS with a particular manufacturing method of the gate conductors, e.g. particular materials, shapes
- H01L21/823835—Complementary field-effect transistors, e.g. CMOS with a particular manufacturing method of the gate conductors, e.g. particular materials, shapes silicided or salicided gate conductors
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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
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- 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
- H01L21/8234—MIS technology, i.e. integration processes of field effect transistors of the conductor-insulator-semiconductor type
- H01L21/8238—Complementary field-effect transistors, e.g. CMOS
- H01L21/823828—Complementary field-effect transistors, e.g. CMOS with a particular manufacturing method of the gate conductors, e.g. particular materials, shapes
- H01L21/82385—Complementary field-effect transistors, e.g. CMOS with a particular manufacturing method of the gate conductors, e.g. particular materials, shapes gate conductors with different shapes, lengths or dimensions
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- H01L29/772—Field effect transistors
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Description
異なる導電型のトランジスタを少なくとも一対有する回路を備えた半導体装置において、
第1の半導体層とその表面の少なくとも一部を覆う第1のゲート絶縁層とを有するnチャンネルトランジスタと、第2の半導体層とその表面の少なくとも一部を覆う第2のゲート絶縁層とを有するpチャンネルトランジスタとを有し、
前記第1の半導体層のチャンネルを形成する第1の領域の表面が(100)面または(100)面から±10°以内の面及び(110)面または(110)面から±10°以内の面の少なくとも一方を有し、
前記第2の半導体層のチャンネルを形成する第2の領域の表面が(110)面または(110)面から±10°以内の面及び(100)面または(100)面から±10°以内の面の少なくとも一方を有し、
前記第1の領域及び前記第2の領域の各両端にソース領域及びドレイン領域とソース電極及びドレイン電極とをそれぞれ備え、
前記第1及び第2の領域の各々から各々の両端の前記ソース電極、ドレイン電極の各々までの抵抗を4Ω・μm以下とし、かつ
前記第1の領域と前記第1のゲート絶縁層との界面及び前記第2の領域と前記第2のゲート絶縁層との界面を、各領域のソースからドレインに向かう方向での長さ2nmにおけるピーク・トゥ・バレイが0.3nm以下であるような平坦度としたことを特徴とする半導体装置。
第1の態様の半導体装置において、前記第1の領域の両端のソース電極及びドレイン電極の少なくともソース領域及びドレイン領域とそれぞれ接する接触部を第1の金属シリサイドで構成し、前記第2の領域の両端のソース電極及びドレイン電極の少なくともソース領域及びドレイン領域とそれぞれ接する接触部を前記第1の金属シリサイドとは異なる第2の金属シリサイドで構成した。
第2の態様の半導体装置において、前記第1の金属シリサイドをその仕事関数が−4.37eV以上になるような材料で構成し、前記第2の金属シリサイドをその仕事関数が−4.85eV以下になるような材料で構成した。
第1の態様の半導体装置において、前記第1の領域の両端のソース領域及びドレイン領域をその仕事関数が−4.37eV以上である第1の金属または金属シリサイドで構成してソース電極及びドレイン電極の少なくとも一部と共用せしめ、前記第2の領域の両端のソース領域及びドレイン領域をその仕事関数が−4.85eV以下である第2の金属または金属シリサイドで構成してソース電極及びドレイン電極の少なくとも一部と共用せしめた。
第1の態様の半導体装置において、前記第1の半導体層の前記第1の領域の上面及び前記第2の半導体層の前記第2の領域の上面をともに(110)面または(110)面から±10°以内の面で構成するとともに、前記第1の半導体層の側面の一方または両方にチャンネルを形成する第3の領域を設け、前記第3の領域の表面を(100)面または(100)面から±10°以内の面を有するようにし、前記第1の領域の上面の面積と前記第3の領域の表面の面積との和が前記第2の領域の上面の面積と実質的に等しいか同等となりかつ前記nチャンネルトランジスタと前記pチャンネルトランジスタの動作速度が実質的に等しいか同等となるように、前記第1の領域の上面の幅及び長さ、前記第2の領域の上面の幅及び長さ、ならびに前記第3の領域の表面の高さ及び長さを定めた。
第1の態様の半導体装置において、前記nチャンネルトランジスタ及び前記pチャンネルトランジスタはともにノーマリオフであり、かつ前記nチャンネルトランジスタ及び前記pチャンネルトランジスタの片方をインバーション型及びアキュムレーション型の一方とし、他方をインバーション型及びアキュムレーション型の前記一方または他方とした。
第6の態様の半導体装置において、前記アキュムレーション型としたトランジスタのチャンネル領域をSOI層で構成するとともに、該SOI層の厚さを、前記チャンネル領域のソース領域近傍における空乏層の厚さより小さくした。
第7の態様の半導体装置において、前記アキュムレーション型としたトランジスタのゲート電圧がソース電圧と同電位の際のチャンネル領域のソース領域側端部が空乏層で満たされるように、前記SOI層の厚さ、前記SOI層の不純物濃度、及び前記チャンネル領域上のゲート電極の仕事関数を定めた。
図14を参照すると、本発明の第1の実施例に係るMOSFETの具体的構成例が示されている。図14に示されたMOSFETは、nMOSFETであり、p型シリコン基板または金属基板51上に埋込絶縁層(BOX)52、BOX52上に形成されたSOI層53を有する。ここで、BOX52は厚さ10.0nmのSiO2によって形成され、他方、SOI層53は厚さ20.0nmのn+シリコン層によって形成されている。SOI層53には、3×1018cm−3の不純物濃度を有するチャンネル領域530と、チャンネル領域530の両側に形成されたチャンネル領域よりも濃度の高いソース領域531及びドレイン領域532が形成されている。チャンネル領域530は0.50μmのチャンネル長Lを有している。更に、チャンネル領域530表面には、SiO2換算膜厚(EOT)が1.0nmの窒化シリコンからなるゲート絶縁膜54が形成されるとともに、ゲート絶縁膜54上には、Taのゲート電極55が形成されている。ゲート絶縁膜54及びゲート電極55はチャンネル領域530の長さ方向において、チャンネル領域全体を覆うとともに、ソース領域531及びドレイン領域532に若干オーバーラップしている。ソース領域531及びドレイン領域532の幅は5nmであり、その両側のSOI層53上にはMgシリサイドによって形成されたソース電極561及びドレイン電極571が設けられている。ソース電極561及びドレイン電極571上にはCuからなるソース配線層56及びドレイン配線層57がそれぞれ接続されている。
次に、図15A〜図15Cを参照して、本発明の第2の実施例として、nMOSFET及びpMOSFETを含むCMOS回路を構成する半導体装置を説明する。
gmp(110)×Wp = gmn(100)×2H+gmp(110)×Wn (6)
Claims (8)
- 異なる導電型のトランジスタを少なくとも一対有する回路を備えた半導体装置において、
第1の半導体層とその表面の少なくとも一部を覆う第1のゲート絶縁層とを有するnチャンネルトランジスタと、第2の半導体層とその表面の少なくとも一部を覆う第2のゲート絶縁層とを有するpチャンネルトランジスタとを有し、
前記第1の半導体層のチャンネルを形成する第1の領域の表面が(100)面または(100)面から±10°以内の面及び(110)面または(110)面から±10°以内の面の少なくとも一方を有し、
前記第2の半導体層のチャンネルを形成する第2の領域の表面が(110)面または(110)面から±10°以内の面及び(100)面または(100)面から±10°以内の面の少なくとも一方を有し、
前記第1の半導体層の前記第1の領域の上面及び前記第2の半導体層の前記第2の領域の上面をともに(110)面または(110)面から±10°以内の面で構成するとともに、前記第1の半導体層の側面の一方または両方にチャンネルを形成する第3の領域を設け、前記第3の領域の表面を(100)面または(100)面から±10°以内の面を有するようにし、前記第1の領域の上面の面積と前記第3の領域の表面の面積との和が前記第2の領域の上面の面積と実質的に等しいか同等となりかつ前記nチャンネルトランジスタと前記pチャンネルトランジスタの動作速度が実質的に等しいか同等となるように、前記第1の領域の上面の幅及び長さ、前記第2の領域の上面の幅及び長さ、ならびに前記第3の領域の表面の高さ及び長さを定めたことを特徴とする半導体装置。 - 前記第1の領域及び前記第2の領域の各両端にソース領域及びドレイン領域とソース電極及びドレイン電極とをそれぞれ備え、
前記第1及び第2の領域の各々から各々の両端の前記ソース電極、ドレイン電極の各々までの抵抗を4Ω・μm以下とし、かつ
前記第1の領域と前記第1のゲート絶縁層との界面及び前記第2の領域と前記第2のゲート絶縁層との界面を、各領域のソースからドレインに向かう方向での長さ2nmにおけるピーク・トゥ・バレイが0.3nm以下であるような平坦度にしたことを特徴とする請求項1に記載の半導体装置。 - 前記第1の領域の両端のソース電極及びドレイン電極の少なくともソース領域及びドレイン領域とそれぞれ接する接触部を第1の金属シリサイドで構成し、前記第2の領域の両端のソース電極及びドレイン電極の少なくともソース領域及びドレイン領域とそれぞれ接する接触部を前記第1の金属シリサイドとは異なる第2の金属シリサイドで構成したことを特徴とする請求項2に記載の半導体装置。
- 前記第1の金属シリサイドをその仕事関数が−4.37eV以上になるような材料で構成し、前記第2の金属シリサイドをその仕事関数が−4.85eV以下になるような材料で構成したことを特徴とする請求項3に記載の半導体装置。
- 前記第1の領域の両端のソース領域及びドレイン領域をその仕事関数が−4.37eV以上である第1の金属または金属シリサイドで構成してソース電極及びドレイン電極の少なくとも一部と共用せしめ、前記第2の領域の両端のソース領域及びドレイン領域をその仕事関数が−4.85eV以下である第2の金属または金属シリサイドで構成してソース電極及びドレイン電極の少なくとも一部と共用せしめたことを特徴とする請求項2に記載の半導体装置。
- 前記nチャンネルトランジスタ及び前記pチャンネルトランジスタはともにノーマリオフであり、かつ前記nチャンネルトランジスタ及び前記pチャンネルトランジスタの片方をインバーション型及びアキュムレーション型の一方とし、他方をインバーション型及びアキュムレーション型の前記一方または他方としたことを特徴とする請求項1に記載の半導体装置。
- 請求項6に記載の半導体装置において、前記アキュムレーション型としたトランジスタのチャンネル領域をSOI層で構成するとともに、該SOI層の厚さを、前記チャンネル領域のソース領域近傍における空乏層の厚さより小さくしたことを特徴とする半導体装置。
- 請求項7に記載の半導体装置において、前記アキュムレーション型としたトランジスタのゲート電圧がソース電圧と同電位の際のチャンネル領域のソース領域側端部が空乏層で満たされるように、前記SOI層の厚さ、前記SOI層の不純物濃度、及び前記チャンネル領域上のゲート電極の仕事関数を定めたことを特徴とする半導体装置。
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JP5299752B2 (ja) * | 2008-04-28 | 2013-09-25 | 国立大学法人東北大学 | 半導体装置 |
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JP2013232666A (ja) | 2013-11-14 |
CN101490823B (zh) | 2012-03-07 |
KR20090039758A (ko) | 2009-04-22 |
JP5590362B2 (ja) | 2014-09-17 |
EP2237314A3 (en) | 2011-03-16 |
TWI445134B (zh) | 2014-07-11 |
EP2442357A3 (en) | 2012-07-11 |
JP2010287897A (ja) | 2010-12-24 |
EP2237314A2 (en) | 2010-10-06 |
JPWO2008007748A1 (ja) | 2009-12-10 |
EP2051292A4 (en) | 2009-11-18 |
JP2013062514A (ja) | 2013-04-04 |
EP2442363A3 (en) | 2012-07-11 |
KR101377348B1 (ko) | 2014-03-25 |
WO2008007748A1 (fr) | 2008-01-17 |
EP2051292A1 (en) | 2009-04-22 |
US20100059830A1 (en) | 2010-03-11 |
EP2442363A2 (en) | 2012-04-18 |
JP5435315B2 (ja) | 2014-03-05 |
TW200826236A (en) | 2008-06-16 |
TW201112356A (en) | 2011-04-01 |
CN101490823A (zh) | 2009-07-22 |
TWI460825B (zh) | 2014-11-11 |
EP2442357A2 (en) | 2012-04-18 |
IL196472A0 (en) | 2009-09-22 |
US8362567B2 (en) | 2013-01-29 |
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