JP2012182232A - 半導体装置の製造方法 - Google Patents
半導体装置の製造方法 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 62
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 40
- 229910052581 Si3N4 Inorganic materials 0.000 claims abstract description 184
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims abstract description 184
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 17
- 239000010703 silicon Substances 0.000 claims abstract description 17
- 239000010931 gold Substances 0.000 claims abstract description 15
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052737 gold Inorganic materials 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 31
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 22
- 239000012159 carrier gas Substances 0.000 claims description 20
- 238000005229 chemical vapour deposition Methods 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 12
- 238000000151 deposition Methods 0.000 claims description 11
- 230000008021 deposition Effects 0.000 claims description 11
- 229910052757 nitrogen Inorganic materials 0.000 claims description 11
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 6
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 4
- 229910021529 ammonia Inorganic materials 0.000 claims description 4
- 229910000077 silane Inorganic materials 0.000 claims description 4
- 238000007740 vapor deposition Methods 0.000 claims description 4
- 238000002161 passivation Methods 0.000 abstract description 20
- 238000001947 vapour-phase growth Methods 0.000 abstract 2
- 230000008569 process Effects 0.000 description 14
- 239000002994 raw material Substances 0.000 description 7
- 229910002601 GaN Inorganic materials 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 229910052734 helium Inorganic materials 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000001307 helium Substances 0.000 description 4
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 4
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 4
- 229910000530 Gallium indium arsenide Inorganic materials 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 150000004767 nitrides Chemical class 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- KXNLCSXBJCPWGL-UHFFFAOYSA-N [Ga].[As].[In] Chemical compound [Ga].[As].[In] KXNLCSXBJCPWGL-UHFFFAOYSA-N 0.000 description 2
- FTWRSWRBSVXQPI-UHFFFAOYSA-N alumanylidynearsane;gallanylidynearsane Chemical compound [As]#[Al].[As]#[Ga] FTWRSWRBSVXQPI-UHFFFAOYSA-N 0.000 description 2
- AJGDITRVXRPLBY-UHFFFAOYSA-N aluminum indium Chemical compound [Al].[In] AJGDITRVXRPLBY-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009616 inductively coupled plasma Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 1
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- AUCDRFABNLOFRE-UHFFFAOYSA-N alumane;indium Chemical compound [AlH3].[In] AUCDRFABNLOFRE-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- MDPILPRLPQYEEN-UHFFFAOYSA-N aluminium arsenide Chemical compound [As]#[Al] MDPILPRLPQYEEN-UHFFFAOYSA-N 0.000 description 1
- RNQKDQAVIXDKAG-UHFFFAOYSA-N aluminum gallium Chemical compound [Al].[Ga] RNQKDQAVIXDKAG-UHFFFAOYSA-N 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- NWAIGJYBQQYSPW-UHFFFAOYSA-N azanylidyneindigane Chemical compound [In]#N NWAIGJYBQQYSPW-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000007772 electroless plating Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- RPQDHPTXJYYUPQ-UHFFFAOYSA-N indium arsenide Chemical compound [In]#[As] RPQDHPTXJYYUPQ-UHFFFAOYSA-N 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76801—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
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Abstract
【解決手段】本発明は、金を含む配線30a及び配線30bを形成する工程と、配線30a及び配線30bに接して、窒化シリコン膜32をプラズマ気相成長する工程と、窒化シリコン膜32の製膜レートよりも大きな製膜レートのもと、窒化シリコン膜32に接し、窒化シリコン膜32よりもシリコン組成比が小さい窒化シリコン膜22をプラズマ気相成長する工程と、を有する半導体装置の製造方法である。
【選択図】図5
Description
チップサイズ:0.5×2mm2
単位ゲート幅W(図1参照):300μm
窒化シリコン膜22の成長条件は以下の通りである。
装置:平行平板プラズマCVD(Chemical Vapor Deposition:化学気相成長)装置
パワー密度:0.07W/cm2
気圧:1Torr(133.3Pa)
炉内温度:300℃
窒化シリコン膜22の窒素(N)に対するシリコン(Si)の組成比Si/Nを0.6〜1までの間において変動させたサンプルを準備した。また、各組成比ごとに、窒化シリコン膜32の膜厚T3は、5nm、及び50nmの2種類とした。サンプルの個数は、各組成比及び各膜厚ごと200個とした。実験では、サンプルに熱衝撃試験を行った後、さらにピーリング試験を行い、200個のサンプルのうち、配線30a又は配線30bなど表面が金(Au)である部分から窒化シリコン膜22の剥離が発生した個数を調べた。熱衝撃試験では、2分間で350℃まで加熱し室温まで戻すサイクルを3回繰り返した。ピーリング試験では、サンプルにテープを貼り付けた後、テープを剥がし、窒化シリコン膜22に剥離が発生したか検証した。
原料流量:SiH4:NH3:キャリアガス=2〜10未満:0〜1:1000sccm(3.38×10−3〜1.69×10−2未満:0〜1.69×10−3:1.69Pa・m3/s)
また具体的には、下記の2通りの方法が挙げられる。
方法1:
シリコン原料としてSiH4、窒素原料及びキャリアガスとして窒素(N2)、キャリアガスとしてヘリウム(He)を使用する。また流量比は、例えばSiH4:キャリアガス=5:1000sccm(8.45×10−3:1.69Pa・m3/s)とする。なお、窒素(N2)とヘリウム(He)との流量比は例えば1:4である。
方法2:
シリコン原料としてSiH4、窒素原料としてNH3、キャリアガスとして窒素(N2)及びヘリウム(He)とを使用する。また流量比は、例えばSiH4:NH3:キャリアガス=5:0.5:1000sccm(8.45×10−3:8.45×10−4:1.69Pa・m3/s)とする。なお、窒素(N2)とヘリウム(He)との流量比は例えば1:4である。
なお、方法1及びのいずれにおいても以下は共通とする。
装置:平行平板プラズマCVD装置
パワー密度:0.07W/cm2
周波数:13.56MHz
気圧:1Torr(133.3Pa)
炉内温度:300℃
製膜レート:10nm/min以下
流量:
SiH4:NH3:キャリアガス=10〜20:2〜10:1000sccm
(1.69×10−2〜3.38×10−2:3.38×10−3〜1.69×10−2:1.69Pa・m3/s)
具体的には下記の条件が挙げられる。
SiH4:NH3:キャリアガス=15:10:1000sccm(2.535×10−2:1.69×10−2:1.69Pa・m3/s)
パワー密度:0.21W/cm2
製膜レート:40nm/min以上
半導体層 11
窒化シリコン膜 20、22、32
ソース電極 24
ドレイン電極 26
ゲート電極 28
配線 30a、30b
開口部 31
Claims (9)
- 金を含む金属層を形成する工程と、
前記金属層に接して、第1窒化シリコン膜をプラズマ気相成長する工程と、
前記第1窒化シリコン膜の製膜レートよりも大きな製膜レートのもと、前記第1窒化シリコン膜に接し、前記第1窒化シリコン膜よりもシリコン組成比が小さい第2窒化シリコン膜をプラズマ気相成長する工程と、を有することを特徴とする半導体装置の製造方法。 - 前記第2窒化シリコン膜の成長は、前記第1窒化シリコン膜の成長に使用したシリコン原料流量よりも大きなシリコン原料流量のもと、シリコン原料に対する窒素原料比が、前記第1窒化シリコン膜の成長時に比べて大なる条件で実行されることを特徴とする請求項1記載の半導体装置の製造方法。
- 前記第1窒化シリコン膜を成長する工程におけるCVD法のパワー密度は、前記第2窒化シリコン膜を成長する工程におけるCVD法のパワー密度よりも低いことを特徴とする請求項1又は2記載の半導体装置の製造方法。
- 前記第1窒化シリコン膜を成長する工程におけるキャリアガスに対するシランの流量比は0.002以上、かつ0.01未満であり、
前記第1窒化シリコン膜を成長する工程における、前記キャリアガスに対するアンモニアの流量比は0以上、かつ0.001以下であることを特徴とする請求項2又は3記載の半導体装置の製造方法。 - 前記第2窒化シリコン膜を成長する工程における、キャリアガスに対するシランの流量比は0.01以上、かつ0.02以下であり、
前記第2窒化シリコン膜を成長する工程における、前記キャリアガスに対するアンモニアの流量比は0.002以上、かつ0.01以下であることを特徴とする請求項4記載の半導体装置の製造方法。 - 前記第1窒化シリコン膜における窒素に対するシリコンの組成比Si/Nは0.8以上であり、
前記第2窒化シリコン膜におけるSi/Nは0.75以下であることを特徴とする請求項1から5いずれか一項記載の半導体装置の製造方法。 - 前記第1窒化シリコン膜及び前記第2窒化シリコン膜に、前記金属層の表面が露出する開口部を設ける工程を有することを特徴とする請求項1から6いずれか一項記載の半導体装置の製造方法。
- 前記第2窒化シリコン膜は、前記第1窒化シリコン膜よりも厚いことを特徴とする請求項1から7いずれか一項記載の半導体装置の製造方法。
- 前記第2窒化シリコン膜を成長する工程の後に、高圧洗浄を行う工程を有することを特徴とする請求項1から8いずれか一項記載の半導体装置の製造方法。
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JP2018010968A (ja) * | 2016-07-13 | 2018-01-18 | 住友電工デバイス・イノベーション株式会社 | 半導体装置 |
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JP6345104B2 (ja) * | 2014-12-24 | 2018-06-20 | 東京エレクトロン株式会社 | 成膜方法 |
KR102044244B1 (ko) * | 2016-12-13 | 2019-12-02 | (주)웨이비스 | 질화물계 전자소자 및 그 제조방법 |
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