JP2007110091A - トランジスタ、およびその製造方法 - Google Patents
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 103
- 239000004065 semiconductor Substances 0.000 claims abstract description 98
- 229910052751 metal Inorganic materials 0.000 claims abstract description 67
- 239000002184 metal Substances 0.000 claims abstract description 67
- 229910008482 TiSiN Inorganic materials 0.000 claims abstract description 39
- QRXWMOHMRWLFEY-UHFFFAOYSA-N isoniazide Chemical compound NNC(=O)C1=CC=NC=C1 QRXWMOHMRWLFEY-UHFFFAOYSA-N 0.000 claims abstract description 39
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 11
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 11
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 7
- 230000000295 complement effect Effects 0.000 claims abstract description 5
- 239000003989 dielectric material Substances 0.000 claims description 57
- 238000000034 method Methods 0.000 claims description 36
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 21
- 239000007772 electrode material Substances 0.000 claims description 13
- 229910004129 HfSiO Inorganic materials 0.000 claims description 10
- 239000000758 substrate Substances 0.000 claims description 10
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 7
- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 239000010703 silicon Substances 0.000 claims description 7
- 229910003855 HfAlO Inorganic materials 0.000 claims description 6
- 229910007875 ZrAlO Inorganic materials 0.000 claims description 6
- 238000000151 deposition Methods 0.000 claims description 6
- 150000004767 nitrides Chemical class 0.000 claims description 4
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 4
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 3
- 229910021193 La 2 O 3 Inorganic materials 0.000 claims description 3
- 229910006501 ZrSiO Inorganic materials 0.000 claims description 3
- 229910052735 hafnium Inorganic materials 0.000 claims description 3
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 claims description 3
- 239000012212 insulator Substances 0.000 claims description 2
- 238000000059 patterning Methods 0.000 claims 1
- 238000012360 testing method Methods 0.000 description 26
- 230000008569 process Effects 0.000 description 24
- 239000002019 doping agent Substances 0.000 description 13
- 230000008901 benefit Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 10
- 238000005530 etching Methods 0.000 description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 9
- 229920002120 photoresistant polymer Polymers 0.000 description 8
- 238000012545 processing Methods 0.000 description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 238000002513 implantation Methods 0.000 description 6
- 238000005229 chemical vapour deposition Methods 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 4
- 235000012239 silicon dioxide Nutrition 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 238000000231 atomic layer deposition Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000001459 lithography Methods 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000005240 physical vapour deposition Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- -1 TiN or TaN Chemical class 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 125000001475 halogen functional group Chemical group 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
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- 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
- H01L21/823842—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 gate conductor materials or different gate conductor implants, e.g. dual gate structures
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Abstract
【解決手段】
トランジスタおよびその製造工程が開示されている。相補型金属酸化膜半導体(CMOS)デバイスは、第1の厚さを有する第1ゲート電極を含むPMOSトランジスタと、第2の厚さを有する第2ゲート電極を含むNMOSトランジスタとを含み、第1の厚さは、第2の厚さよりも大きい。第1ゲート電極および第2ゲート電極は、同じ材料を含んでいることが好ましく、例として、TiSiN、TaNまたはTiNを含んでいるとよい。第1ゲート電極および第2ゲート電極の厚さによって、PMOSトランジスタおよびNMOSトランジスタの仕事関数が設定される。
【選択図】なし
Description
Claims (26)
- 第1の厚さを有する第1ゲート電極を含む第1トランジスタと、
上記第1トランジスタに近接する第2トランジスタとを含み、
上記第2トランジスタは、上記第1の厚さと異なる第2の厚さを有する第2ゲート電極を含むことを特徴とする半導体デバイス。 - 上記第1ゲート電極および上記第2ゲート電極は、TiSiN、TaNまたはTiNを含むことを特徴とする請求項1に記載の半導体デバイス。
- 相補型金属酸化膜半導体(CMOS)デバイスを含み、
上記第1トランジスタは、PMOSトランジスタを含み、
上記第2トランジスタは、NMOSトランジスタを含み、
上記第1の厚さは、上記第2の厚さよりも大きいことを特徴とする請求項1に記載の半導体デバイス。 - 上記第1の厚さは、上記第2の厚さよりも、およそ50オングストローム以上大きいことを特徴とする請求項3に記載の半導体デバイス。
- 上記第1の厚さは、およそ500オングストローム以下であり、
上記第2の厚さは、およそ100オングストローム以下であることを特徴とする請求項3に記載の半導体デバイス。 - 上記第1の厚さは、およそ200オングストロームであり、
上記第2の厚さは、およそ25オングストロームであることを特徴とする請求項5に記載の半導体デバイス。 - 上記第1ゲート電極は、上記第2ゲート電極と同じ材料を含むことを特徴とする請求項1に記載の半導体デバイス。
- 上記第1ゲート電極および上記第2ゲート電極は、第1層、および上記第1層の上に配置された第2層を含み、
上記第1層は、金属を含み、
上記第2層は、半導体材料を含むことを特徴とする請求項1に記載の半導体デバイス。 - 上記第2層は、およそ2000オングストローム以下の厚さを有すると共に、多結晶シリコンを含むことを特徴とする請求項8に記載の半導体デバイス。
- 上記第1ゲート電極は、第1金属層、および上記第1金属層の上に配置された第2金属層を含み、
上記第2ゲート電極は、上記第2金属層を含むことを特徴とする請求項1に記載の半導体デバイス。 - 上記第1ゲート電極および上記第2ゲート電極の下に配置されたゲート誘電体と、
上記ゲート誘電体の下に配置された加工対象部品とをさらに含み、
上記加工対象部品は、各ゲート誘電体に近接するソース領域およびドレイン領域を含むことを特徴とする請求項1に記載の半導体デバイス。 - 上記ゲート誘電体は、ハフニウムから作られた誘電体、HfO2、HfSiOx、Al2O3、ZrO2、ZrSiOx、Ta2O5、La2O3、これらの窒化物、SixNy、SiON、HfAlOx、HfAlOxN1−x−y、ZrAlOx、ZrAlOxNy、SiAlOx、SiAlOxN1−x−y、HfSiAlOx、HfSiAlOxNy、ZrSiAlOx、ZrSiAlOxNy、SiO2、これらの化合物またはこれらの多層を含むことを特徴とする請求項11に記載の半導体デバイス。
- 上記第1ゲート電極および上記第2ゲート電極は、およそ4.4eVから4.9eVの仕事関数を有することを特徴とする請求項1に記載の半導体デバイス。
- 第1の厚さを有する第1ゲート電極を含むpチャネル型金属酸化膜半導体(PMOS)トランジスタと、
第2の厚さを有する第2ゲート電極を含むnチャネル型金属酸化膜半導体(NMOS)トランジスタとを含み、
上記第2の厚さは、上記第1の厚さよりも小さく、
上記第2ゲート電極は、上記第1ゲート電極と同じ材料で構成され、
上記第1ゲート電極および上記第2ゲート電極の上記第1の厚さおよび上記第2の厚さによって、上記PMOSトランジスタおよび上記NMOSトランジスタの仕事関数がそれぞれ設定されることを特徴とする半導体デバイス。 - 上記第1ゲート電極および上記第2ゲート電極は、TiSiN、TaNまたはTiNを含むことを特徴とする請求項14に記載の半導体デバイス。
- 上記PMOSトランジスタは、第1PMOSトランジスタを含み、
上記NMOSトランジスタは、第1NMOSトランジスタを含み、
さらに、第3の厚さを有する第3ゲート電極を含む少なくとも1つの第2PMOSトランジスタと、
第4の厚さを有する第4ゲート電極を含む少なくとも1つの第2NMOSトランジスタとを含み、
上記第3の厚さおよび上記第4の厚さは、上記第1の厚さおよび上記第2の厚さと異なることを特徴とする請求項14に記載の半導体デバイス。 - 上記第1PMOSトランジスタおよび上記第1NMOSトランジスタは、第1CMOSデバイスを含み、
上記少なくとも1つの第2PMOSトランジスタ、および上記少なくとも1つの第2NMOSトランジスタは、少なくとも1つの第2CMOSデバイスを含み、
上記第1CMOSデバイスは、第1デバイスタイプを含み、
上記少なくとも1つの第2CMOSデバイスは、第2デバイスタイプを含み、
上記第2デバイスタイプは、上記第1デバイスタイプと異なり、
上記第1デバイスタイプおよび上記第2デバイスタイプは、高性能(HP)デバイス、低駆動電力(LOP)デバイスまたは低待機電力(LSTP)デバイスを含むことを特徴とする請求項16に記載の半導体デバイス。 - 加工対象部品を供給する工程と、
上記加工対象部品の上にゲート誘電体材料を形成する工程と、
上記ゲート誘電体材料の上にゲート電極材料を形成する工程とを含み、
上記ゲート電極材料は、第1領域における第1の厚さおよび第2領域における第2の厚さを有し、上記第2の厚さは、上記第1の厚さと異なり、
さらに、上記第1領域における第1トランジスタのゲート電極およびゲート誘電体と、上記第2領域における第2トランジスタのゲート電極およびゲート誘電体とを形成するために、上記ゲート電極材料および上記ゲート誘電体材料をパターニングする工程と、
上記第1トランジスタおよび上記第2トランジスタの上記ゲート誘電体に近接する上記加工対象部品に、ソース領域およびドレイン領域を形成する工程とを含むことを特徴とする半導体デバイスの製造方法。 - 上記ゲート電極材料を形成する工程は、TiSiN、TaNまたはTiNを形成する工程を含むことを特徴とする請求項18に記載の半導体デバイスの製造方法。
- 上記ゲート電極材料を形成する工程は、上記第1領域および上記第2領域上の上記ゲート誘電体材料の上に第1金属層を蒸着する工程と、
上記第2領域における上記ゲート電極材料の少なくとも一部を取り除く工程とを含むことを特徴とする請求項18に記載の半導体デバイスの製造方法。 - 上記第2領域における上記ゲート電極材料の少なくとも一部を取り除く工程は、上記第2領域における上記ゲート電極材料の全てを取り除く工程を含むことを特徴とする請求項20に記載の半導体デバイスの製造方法。
- さらに、少なくとも上記第2領域における上記ゲート誘電体材料の上に、第2金属層を蒸着する工程を含むことを特徴とする請求項21に記載の半導体デバイスの製造方法。
- 上記ゲート誘電体材料の上に上記第2金属層を蒸着する工程は、さらに、上記第1領域において第2金属層を蒸着する工程を含むことを特徴とする請求項22に記載の半導体デバイスの製造方法。
- 上記ゲート誘電体を形成する工程は、ハフニウムから作られた誘電体、HfO2、HfSiOx、Al2O3、ZrO2、ZrSiOx、Ta2O5、La2O3、これらの窒化物、SixNy、SiON、HfAlOx、HfAlOxN1−x−y、ZrAlOx、ZrAlOxNy、SiAlOx、SiAlOxN1−x−y、HfSiAlOx、HfSiAlOxNy、ZrSiAlOx、ZrSiAlOxNy、SiO2、これらの化合物またはこれらの多層を形成する工程を含むことを特徴とする請求項18に記載の半導体デバイスの製造方法。
- 上記加工対象部品を供給する工程は、シリコンオンインシュレータ(SOI)基板を供給する工程を含むことを特徴とする請求項18に記載の半導体デバイスの製造方法。
- 上記ゲート電極材料を形成する工程は、
金属層を形成する工程と、
上記金属層の上に半導体材料層を形成する工程とを含むことを特徴とする請求項18に記載の半導体デバイスの製造方法。
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US20070052036A1 (en) | 2007-03-08 |
EP1760777A3 (en) | 2008-05-07 |
TW200711046A (en) | 2007-03-16 |
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