JP5583448B2 - 半導体デバイス及びこれの形成方法 - Google Patents
半導体デバイス及びこれの形成方法 Download PDFInfo
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- JP5583448B2 JP5583448B2 JP2010075677A JP2010075677A JP5583448B2 JP 5583448 B2 JP5583448 B2 JP 5583448B2 JP 2010075677 A JP2010075677 A JP 2010075677A JP 2010075677 A JP2010075677 A JP 2010075677A JP 5583448 B2 JP5583448 B2 JP 5583448B2
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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
- H01L21/77—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
- H01L21/823807—Complementary field-effect transistors, e.g. CMOS with a particular manufacturing method of the channel structures, e.g. channel implants, halo or pocket implants, or channel materials
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
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- H01L21/28017—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon
- H01L21/28026—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon characterised by the conductor
- H01L21/28097—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon characterised by the conductor the final conductor layer next to the insulator being a metallic silicide
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
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- H01L21/28017—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon
- H01L21/28158—Making the insulator
- H01L21/28167—Making the insulator on single crystalline silicon, e.g. using a liquid, i.e. chemical oxidation
- H01L21/28194—Making the insulator on single crystalline silicon, e.g. using a liquid, i.e. chemical oxidation by deposition, e.g. evaporation, ALD, CVD, sputtering, laser deposition
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- 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
- H01L21/77—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
- H01L21/823842—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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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Description
本発明は、デバイス性能の改善された、低閾値電圧の相補型金属酸化膜半導体(CMOS)デバイスのためのゲート構造体を提供することを目的とする。
6:ハードマスク誘電体層
7:第1のエッチング・マスク
8:第2のエッチング・マスク
9:第3のエッチング・マスク
10:n型デバイス領域
13:分離領域
20:p型デバイス領域
30:Ge含有層
40:第1の誘電体層
50:基板の第1の部分
60:基板の第2の部分
70:第2の誘電体層
75:希土類金属層
80a、80b、80c、80d:ゲート構造体
85:ゲート金属層
90:ゲート電極
100:半導体デバイス
110a、110b:n型導電性デバイス
120a、120b:p型導電性デバイス
Claims (19)
- デジタルCMOSデバイスのための第1の部分と、該第1の部分に隣接し、アナログCMOSデバイスのための第2の部分とを有する半導体基板であって、前記デジタルCMOSデバイスのための第1の部分は、n型デバイス領域及びp型デバイス領域を有し、前記アナログCMOSデバイスのための第2の部分は、n型デバイス領域及びp型デバイス領域を有する、前記半導体基板と、
前記デジタルCMOSデバイスのための第1の部分の前記n型デバイス領域及び前記p型デバイス領域にそれぞれ設けられたデジタルnMOSデバイス及びデジタルpMOSデバイスと、
前記アナログCMOSデバイスのための第2の部分の前記n型デバイス領域及び前記p型デバイス領域にそれぞれ設けられたアナログnMOSデバイス及びアナログpMOSデバイスとを備え、
前記アナログnMOSデバイスは、前記半導体基板上に設けられた第1誘電体層と、該第1誘電体層上に設けられたゲート構造体とを有し、該ゲート構造体は、前記第1誘電体層上に設けられ該第1誘電体層より大きい誘電率の高k誘電体である第2誘電体層と、該第2誘電体層上に設けられた希土類金属層と、該希土類金属層上に設けられたゲート金属層及びゲート電極とを有し、
前記アナログpMOSデバイスは、前記半導体基板上に設けられたGe含有層と、該Ge含有層上に設けられた前記第1誘電体層と、該第1誘電体層上に設けられたゲート構造体とを有し、該ゲート構造体は、前記第1誘電体層上に設けられ前記第2誘電体層と、該第2誘電体層上に設けられた前記ゲート金属層及び前記ゲート電極とを有し、
前記デジタルnMOSデバイスは、前記半導体基板上に設けられたゲート構造体を有し、該ゲート構造体は、前記半導体基板上に設けられた前記第2誘電体層と、該第2誘電体層上に設けられた前記希土類金属層と、該希土類金属層上に設けられた前記ゲート金属層及び前記ゲート電極とを有し、
前記デジタルpMOSデバイスは、前記半導体基板上に設けられた前記Ge含有層と、該Ge含有層上に設けられたゲート構造体とを有し、該ゲート構造体は、前記Ge含有層上に設けられた前記第2誘電体層と、該第2誘電体層上に設けられた前記ゲート金属層及び前記ゲート電極とを有する、半導体デバイス。 - 前記第2誘電体層は、HfO2、ZrOx、Al2O3、又はHfSiOxNyである、請求項1に記載の半導体デバイス。
- 前記第2誘電体層は、窒化物含有層である、請求項1に記載の半導体デバイス。
- 前記アナログnMOSデバイスの前記第1誘電体層及び前記アナログpMOSデバイスの前記第1誘電体層の厚さは同じであり、
前記アナログnMOSデバイスの前記第2誘電体層、前記アナログpMOSデバイスの前記第2誘電体層、前記デジタルnMOSデバイスの前記第2誘電体層及び前記デジタルpMOSデバイスの前記第2誘電体層の厚さは同じであり、
前記アナログnMOSデバイスの前記希土類金属層及び前記デジタルnMOSデバイスの前記希土類金属層の厚さは同じであり、
前記アナログpMOSデバイスの前記Ge含有層及び前記デジタルpMOSデバイスの前記Ge含有層の厚さは同じである、請求項1に記載の半導体デバイス。 - 前記ゲート金属層はTiNである、請求項1に記載の半導体デバイス。
- 前記p型導電性デバイスは、前記Ge含有層からなるデバイス・チャネルの上を覆うSiキャップをさらに含む、請求項1に記載の半導体デバイス。
- 前記希土類金属層は、La、Ce、Pr、Nd、Pm、Sm、Eu、Gd、Tb、Dy、Ho、Er、Tm、Yb、Lu、又はそれらの合金である、請求項1に記載の半導体デバイス。
- 前記Ge含有層はSiGeである、請求項1に記載の半導体デバイス。
- 前記アナログnMOSデバイス及び前記アナログpMOSデバイスの間に分離領域が設けられ、前記アナログpMOSデバイス及び前記デジタルnMOSデバイスの間に分離領域が設けられ、前記デジタルnMOSデバイス及び前記デジタルpMOSデバイスの間に分離領域が設けられている、請求項1に記載の半導体デバイス。
- 前記アナログnMOSデバイス、前記アナログpMOSデバイス、前記デジタルnMOSデバイス及び前記デジタルpMOSデバイスのそれぞれは、ソース拡散領域及びドレイン拡散領域を有する、請求項1に記載の半導体デバイス。
- 半導体基板に、n型デバイス領域及びp型デバイス領域を有するデジタルCMOSデバイスのための第1の部分と、該第1の部分に隣接し、n型デバイス領域及びp型デバイス領域を有するアナログCMOSデバイスのための第2の部分を規定するステップと、
前記第1の部分の前記n型デバイス領域の前記半導体基板の上及び前記第2の部分の前記n型デバイス領域の前記半導体基板の上にハードマスク誘電体層を形成するステップと、
前記第1の部分の前記p型デバイス領域の前記半導体基板の上及び前記第2の部分の前記p型デバイス領域の前記半導体基板の上にGe含有層を形成するステップと、
前記ハードマスク誘電体層を除去するステップと、
前記第1の部分の前記n型デバイス領域の半導体基板の上及び前記p型デバイス領域の前記Ge含有層の上、並びに前記第2の部分の前記n型デバイス領域の前記半導体基板の上及び前記p型デバイス領域の前記Ge含有層の上に、第1誘電体層を形成するステップと、
前記第2の部分の前記n型デバイス領域の前記第1誘電体層の上及び前記p型デバイス領域の前記Ge含有層の上の前記第1誘電体層の上にエッチング・マスクを形成するステップと、
前記エッチング・マスクにより保護されていない前記第1の部分の前記n型デバイス領域及び前記p型デバイス領域の前記第1誘電体層を除去するステップと、
前記エッチング・マスクを除去するステップと、
前記第1の部分の前記n型デバイス領域の前記半導体基板の上及び前記p型デバイス領域の前記Ge含有層の上、並びに前記第2の部分の前記n型デバイス領域の前記第1誘電体層の上及び前記p型デバイス領域の前記Ge含有層の上の前記第1誘電体層の上に該第1誘電体層より大きい誘電率の高k誘電体である第2誘電体層を形成するステップと、
前記第1の部分及び前記第2の部分の前記第2誘電体層の上に希土類金属層を形成するステップと、
前記第1の部分の前記p型デバイス領域の上及び前記第2の部分の前記p型デバイス領域の上の前記希土類金属層を除去することにより、前記第1の部分の前記n型デバイス領域の前記第2誘電体層の上、及び前記第2の部分の前記n型デバイス領域の前記第2誘電体層の上に前記希土類金属層を残すステップと、
前記第1の部分の前記n型デバイス領域の前記希土類金属層の上及び前記p型デバイス領域の前記第2誘電体層の上、並びに前記第2の部分の前記n型デバイス領域の前記希土類金属層の上及び前記p型デバイス領域の第2誘電体層の上に、ゲート金属層を形成し、該ゲート金属層の上にゲート電極を形成するステップと、
リソグラフィ及びエッチングにより、
前記第2の部分の前記n型デバイス領域の前記第1誘電体層の上に、前記第2誘電体層と、該第2誘電体層上に設けられた希土類金属層と、該希土類金属層上に設けられた前記ゲート金属層及び前記ゲート電極とを有するゲート構造体を形成し、
前記第2の部分の前記p型デバイス領域の前記第1誘電体層の上に、前記第2誘電体層と、該第2誘電体層上に設けられた前記ゲート金属層及び前記ゲート電極とを有するゲート構造体を形成し、
前記第1の部分の前記n型デバイス領域の前記半導体基板の上に、前記第2誘電体層と、該第2誘電体層上に設けられた前記希土類金属層と、該希土類金属層上に設けられた前記ゲート金属層及び前記ゲート電極とを有するゲート構造体を形成し、
前記第1の部分の前記p型デバイス領域の前記Ge含有層の上に、前記第2誘電体層と、該第2誘電体層上に設けられた前記ゲート金属層及び前記ゲート電極とを有するゲート構造体を形成するステップとを含む、半導体デバイスの形成方法。 - 前記第2誘電体層は、HfO 2 、ZrO x 、Al 2 O 3 、又はHfSiO x N y である、請求項11に記載の方法。
- 前記第2誘電体層は、窒化物含有層である、請求項11に記載の方法。
- 前記ゲート金属層はTiNである、請求項11に記載の方法。
- 前記第1の部分及び前記第2の部分の前記p型デバイス領域のそれぞれの前記Ge含有層の上を覆うSiキャップをさらに含む、請求項11に記載の方法。
- 前記希土類金属層は、La、Ce、Pr、Nd、Pm、Sm、Eu、Gd、Tb、Dy、Ho、Er、Tm、Yb、Lu、又はそれらの合金である、請求項11に記載の方法。
- 前記Ge含有層はSiGeである、請求項11に記載の方法。
- 前記第2の部分の前記n型デバイス領域及び前記p型デバイス領域の間に分離領域が設けられ、前記第2部分のp型デバイス領域及び前記第1の部分のn型デバイス領域の間に分離領域が設けられ、前記第1の部分の前記n型デバイス領域及び前記p型デバイス領域の間に分離領域が設けられている、請求項11に記載の方法。
- 前記第2の部分のn型デバイス領域及び前記p型デバイス領域、並びに前記第1の部分のn型デバイス領域及び前記p型デバイス領域のそれぞれに、ソース拡散領域及びドレイン拡散領域を形成するステップを含む、請求項11に記載の方法。
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US20100264495A1 (en) | 2010-10-21 |
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