JP2007504679A - 個別ゲート構造を備えたトランジスタ - Google Patents
個別ゲート構造を備えたトランジスタ Download PDFInfo
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- JP2007504679A JP2007504679A JP2006532424A JP2006532424A JP2007504679A JP 2007504679 A JP2007504679 A JP 2007504679A JP 2006532424 A JP2006532424 A JP 2006532424A JP 2006532424 A JP2006532424 A JP 2006532424A JP 2007504679 A JP2007504679 A JP 2007504679A
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- 239000004065 semiconductor Substances 0.000 claims abstract description 99
- 238000000034 method Methods 0.000 claims abstract description 97
- 239000000463 material Substances 0.000 claims abstract description 59
- 239000000758 substrate Substances 0.000 claims abstract description 40
- 238000005530 etching Methods 0.000 claims abstract description 29
- 238000000151 deposition Methods 0.000 claims abstract description 20
- 150000004767 nitrides Chemical class 0.000 claims description 22
- 239000011232 storage material Substances 0.000 claims description 17
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 9
- 229920005591 polysilicon Polymers 0.000 claims description 9
- 239000002159 nanocrystal Substances 0.000 claims description 7
- 238000005498 polishing Methods 0.000 claims description 7
- 239000002019 doping agent Substances 0.000 claims description 6
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 5
- 238000000059 patterning Methods 0.000 claims description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 4
- 238000004528 spin coating Methods 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 229920002120 photoresistant polymer Polymers 0.000 claims description 2
- 238000003860 storage Methods 0.000 description 78
- 230000006870 function Effects 0.000 description 15
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 6
- 239000010703 silicon Substances 0.000 description 6
- 229910021332 silicide Inorganic materials 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000003989 dielectric material Substances 0.000 description 4
- 238000001312 dry etching Methods 0.000 description 4
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 239000006117 anti-reflective coating Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000005468 ion implantation Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000002161 passivation Methods 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 238000001039 wet etching Methods 0.000 description 2
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- RUFLMLWJRZAWLJ-UHFFFAOYSA-N nickel silicide Chemical compound [Ni]=[Si]=[Ni] RUFLMLWJRZAWLJ-UHFFFAOYSA-N 0.000 description 1
- 229910021334 nickel silicide Inorganic materials 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- HWEYZGSCHQNNEH-UHFFFAOYSA-N silicon tantalum Chemical compound [Si].[Ta] HWEYZGSCHQNNEH-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
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- H01L29/66795—Unipolar field-effect transistors with an insulated gate, i.e. MISFET with a gate at the side of the channel with a horizontal current flow in a vertical sidewall of a semiconductor body, e.g. FinFET, MuGFET
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- G11C16/0475—Erasable programmable read-only memories electrically programmable using variable threshold transistors, e.g. FAMOS comprising cells with charge storage in an insulating layer, e.g. metal-nitride-oxide-silicon [MNOS], silicon-oxide-nitride-oxide-silicon [SONOS] comprising two or more independent storage sites which store independent data
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Abstract
Description
以下に、本発明を実現する形態に関する詳細な記述を示す。本記述は本発明を例示するために為されるものであり、本発明を制限するものと解釈されるべきではない。
Claims (33)
- 半導体装置を形成する方法であって、
基板及び該基板の上に半導体構造を設けることであって、該半導体構造は、第1側壁と、第2側壁と、頂部表面とを有する、設けること、
少なくとも一つの実質的に共形な層を前記基板の上に堆積させることであって、該少なくとも一つの実質的に共形な層は、少なくとも一つのゲート材料層を含み、かつ前記半導体構造の上の所定の高さに頂部表面を有する、堆積させること、
実質的に平坦な層を、前記基板の上であり、かつ前記半導体構造の上の前記少なくとも一つの実質的に共形な層の前記頂部表面の高さよりも低い位置に形成すること、
前記半導体構造の前記頂部表面の上のゲート材料層を、研磨以外の方法でエッチングすること、
を備える方法。 - 請求項1に記載の方法であって、更に、
前記実質的に平坦な層を前記基板の上に形成する前に、前記少なくとも一つの実質的に共形な層をパターニングしてゲート構造を形成することを備え、
前記半導体構造の前記頂部表面の上のゲート材料層を、研磨以外の方法でエッチングすることは、更に、前記半導体構造の前記頂部表面の上の前記ゲート構造のゲート材料層をエッチングすることを含む、方法。 - 請求項1に記載の方法において、前記ゲート材料層は前記基板の表面に実質的に平行に延びる部分を有し、本方法は、更に、前記ゲート材料層のうちの、前記基板の表面に実質的に平行に延びる前記部分の上にコンタクトを形成することを備える、方法。
- 請求項1に記載の方法において、前記実質的に平坦な層を形成することは、
前記実質的に平坦な層の材料を、前記少なくとも一つの実質的に共形な層の前記頂部表面の高さよりも高い位置まで堆積させること、
前記実質的に平坦な層の材料を、前記少なくとも一つの実質的に共形な層の頂部表面の高さよりも低い位置までエッチ・バックして、前記半導体構造の前記頂部表面の上の前記少なくとも一つの実質的に共形な層の前記頂部表面を露出させること、
を含む、方法。 - 請求項1に記載の方法において、前記実質的に平坦な層を形成することは、前記実質的に平坦な層の材料を、前記半導体基板の表面の上に、前記少なくとも一つの実質的に共形な層の前記頂部表面の高さよりも低い位置まで堆積させることを含む、方法。
- 請求項1に記載の方法において、前記実質的に平坦な層を形成することは、前記実質的に平坦な層の材料をスピン塗布することを含む、方法。
- 請求項1に記載の方法において、前記少なくとも一つの実質的に共形な層は、更に、前記ゲート材料層の上に窒化物層を含む、方法。
- 請求項7に記載の方法であって、更に、
前記ゲート材料層を、研磨以外の方法でエッチングする前に、前記半導体構造の前記頂部表面の上の前記窒化物層をエッチングすること、
を備える方法。 - 請求項1に記載の方法であって、更に、
前記少なくとも一つの実質的に共形な層を形成する前に、誘電体層を前記半導体構造の上に形成すること、
を備える方法。 - 請求項9に記載の方法であって、更に、
前記少なくとも一つの実質的に共形な層を形成する前に、電荷蓄積材料層を前記半導体構造の上に形成すること、
を備え、該電荷蓄積材料層は、前記第1側壁に隣接して位置する第1部分及び前記第2側壁に隣接して位置する第2部分を含む、方法。 - 請求項10に記載の方法において、前記電荷蓄積材料層は、電荷を蓄積するポリシリコン及び窒化シリコンのうちの少なくとも一方を含む、方法。
- 請求項10に記載の方法において、前記電荷蓄積材料層は、電荷を蓄積するナノ結晶を含む、方法。
- 請求項1に記載の方法において、前記実質的に平坦な層はフォト・レジストを含む、方法。
- 請求項1に記載の方法において、前記ゲート材料層はポリシリコンを含む、方法。
- 請求項1に記載の方法において、前記ゲート材料層は金属を含む、方法。
- 請求項1に記載の方法において、前記少なくとも一つの共形な層は、前記ゲート材料層の後に形成される第2の実質的に共形な層を含み、該第2の実質的に共形な層はエッチング停止層として使用される、方法。
- 請求項1に記載の方法であって、更に、
頂部表面を有する誘電体構造を、前記半導体構造の前記頂部表面の上に設けることを備え、
前記少なくとも一つの実質的に共形な層は、前記誘電体構造の上に堆積され、前記ゲート材料層を、研磨以外の方法でエッチングすることは、更に、前記誘電体構造の前記頂部表面の上のゲート材料層をエッチングすることを含む、方法。 - 請求項17に記載の方法において、前記ゲート材料層を、研磨以外の方法でエッチングすることは、更に、前記ゲート材料のうちの、前記第1側壁に隣接して位置する第1部分、及び前記ゲート材料のうちの、前記第2側壁に隣接して位置する第2部分を残すように、前記ゲート材料層をエッチングすることを含み、前記ゲート材料の第1部分及び第2部分はそれぞれ、前記半導体構造の前記頂部表面の高さよりも高い位置であり、かつ前記誘電体構造の前記頂部表面の高さよりも低い位置に頂部表面を有する、方法。
- 請求項1に記載の方法であって、更に、
第1タイプのドーパントを前記基板に対して第1の角度で、前記第1側壁に隣接する領域のゲート材料層に注入すること、
第2タイプのドーパントを前記基板に対して第2の角度で、前記第2側壁に隣接する領域のゲート材料層に注入すること、
を備える方法。 - 半導体装置を形成する方法であって、
基板及び該基板の上に半導体構造を設けることであって、該半導体構造は、第1側壁と、第2側壁と、頂部表面とを有する、設けること、
ゲート材料から成る第1の実質的に共形な層を、前記基板及び前記半導体構造の上に堆積させること、
所定の材料から成る第2の実質的に共形な層を、前記第1の実質的に共形な層の上に堆積させること、
前記第2の実質的に共形な層を堆積させた後に、実質的に平坦な層を前記基板の上に形成すること、
前記半導体構造の前記頂部表面の上の前記第1の実質的に共形な層をエッチングすること、
前記半導体構造の前記頂部表面の上の前記第2の実質的に共形な層をエッチングすること、
前記第1の実質的に共形な層の一部に接触するコンタクトを形成すること、
を備える方法。 - 請求項20に記載の方法において、前記第1の実質的に共形な層をエッチングすることにより、前記半導体構造の前記第1側壁に隣接し、かつ前記基板の第1部分の上に延在する前記第1の実質的に共形な層の第1部分、及び前記半導体構造の前記第2側壁に隣接し、かつ前記基板の第2部分の上に延在する前記第1の実質的に共形な層の第2部分が形成され、該第1部分及び第2部分は互いに電気的に絶縁される、方法。
- 請求項21に記載の方法において、前記コンタクトを形成することは、前記基板の第1部分の上の前記第1の実質的に共形な層の前記第1部分に接触するコンタクトを形成することを含む、方法。
- 請求項22に記載の方法であって、更に、前記基板の第2部分の上の前記第1の実質的に共形な層の前記第2部分に接触する第2コンタクトを形成することを備える、方法。
- 請求項20に記載の方法であって、更に、前記第1の実質的に共形な層をエッチングし、かつ前記第2の実質的に共形な層をエッチングした後に、前記実質的に平坦な層を除去することを備える、方法。
- 請求項24に記載の方法であって、更に、前記第1の実質的に共形な層をエッチングし、かつ前記第2の実質的に共形な層をエッチングした後に、前記第2の実質的に共形な層を除去することを備える、方法。
- 請求項20に記載の方法において、前記実質的に平坦な層はスピン塗布材料である、方法。
- 請求項20に記載の方法であって、更に、前記第2の実質的に平坦な層を堆積させる前に、前記第1の実質的に共形な層のうちの、前記半導体構造の電流端子部分の上の部分を除去することを備える、方法。
- 請求項20に記載の方法において、前記実質的に平坦な層を形成することは、前記実質的に平坦な層の材料を、前記半導体構造の前記頂部表面の上の前記第2の実質的に共形な層の頂部表面の高さよりも低い位置にまで堆積させることを含む、方法。
- 請求項20に記載の方法であって、更に、前記第1の実質的に共形な層をエッチングする前に、前記実質的に平坦な層をエッチ・バックして、前記実質的に平坦な層を、前記半導体構造の上の前記第2の実質的に共形な層の頂部表面の高さよりも低い位置にまで下げることを備える、方法。
- 請求項20に記載の方法であって、更に、
前記第1の実質的に共形な層を形成する前に、電荷蓄積材料層を前記基板及び前記半導体構造の上に形成することを備え、該電荷蓄積材料層は、前記第1側壁に隣接して位置する第1部分及び前記第2側壁に隣接して位置する第2部分を含む、方法。 - 請求項30に記載の方法において、前記電荷蓄積材料層は、電荷を蓄積する窒化シリコン及びポリシリコンのうちの少なくとも一方を含む、方法。
- 請求項30に記載の方法において、前記電荷蓄積材料層は電荷を蓄積するナノ結晶を含む、方法。
- 半導体構造を形成する方法であって、
基板を設けること、
第1及び第2側壁を有する半導体フィンを前記基板の上に形成すること、
前記フィンの前記第1側壁に隣接する第1部分及び前記フィンの前記第2側壁に隣接する第2部分を含む電荷蓄積材料層を前記基板の上に形成すること、
前記電荷蓄積材料層を形成した後に、前記フィンの前記第1側壁に隣接する第1部分及び前記フィンの前記第2側壁に隣接する第2部分を含むゲート材料層を前記基板の上に形成すること、
前記半導体フィンの上の前記ゲート材料層を除去すること、
を備える方法。
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JP2014116596A (ja) * | 2012-11-15 | 2014-06-26 | Semiconductor Energy Lab Co Ltd | 半導体装置 |
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Also Published As
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US20040235300A1 (en) | 2004-11-25 |
WO2004107399A3 (en) | 2005-06-09 |
WO2004107399A2 (en) | 2004-12-09 |
US7192876B2 (en) | 2007-03-20 |
TW200507264A (en) | 2005-02-16 |
KR101079562B1 (ko) | 2011-11-04 |
KR20060008326A (ko) | 2006-01-26 |
CN1795540A (zh) | 2006-06-28 |
CN100466186C (zh) | 2009-03-04 |
TWI361489B (en) | 2012-04-01 |
JP5350589B2 (ja) | 2013-11-27 |
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