TW469587B - Semiconductor device a burried wiring structure and process for fabricating the same - Google Patents
Semiconductor device a burried wiring structure and process for fabricating the same Download PDFInfo
- Publication number
- TW469587B TW469587B TW089121747A TW89121747A TW469587B TW 469587 B TW469587 B TW 469587B TW 089121747 A TW089121747 A TW 089121747A TW 89121747 A TW89121747 A TW 89121747A TW 469587 B TW469587 B TW 469587B
- Authority
- TW
- Taiwan
- Prior art keywords
- metal
- metal lead
- insulating film
- trench
- lead
- Prior art date
Links
- 239000004065 semiconductor Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims description 50
- 230000008569 process Effects 0.000 title claims description 24
- 229910052751 metal Inorganic materials 0.000 claims abstract description 145
- 239000002184 metal Substances 0.000 claims abstract description 145
- 239000000758 substrate Substances 0.000 claims abstract description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 33
- 229910052802 copper Inorganic materials 0.000 claims description 32
- 239000010949 copper Substances 0.000 claims description 32
- 238000009792 diffusion process Methods 0.000 claims description 29
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- 238000009413 insulation Methods 0.000 claims description 3
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- 239000010408 film Substances 0.000 description 98
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- 239000010409 thin film Substances 0.000 description 9
- 238000005530 etching Methods 0.000 description 8
- 229910052581 Si3N4 Inorganic materials 0.000 description 7
- 238000000151 deposition Methods 0.000 description 7
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 7
- 230000004888 barrier function Effects 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 238000005121 nitriding Methods 0.000 description 5
- 229920002120 photoresistant polymer Polymers 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 229910052814 silicon oxide Inorganic materials 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- -1 cyclic fluororesin Chemical compound 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- NIHNNTQXNPWCJQ-UHFFFAOYSA-N fluorene Chemical compound C1=CC=C2CC3=CC=CC=C3C2=C1 NIHNNTQXNPWCJQ-UHFFFAOYSA-N 0.000 description 2
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229920000620 organic polymer Polymers 0.000 description 2
- 238000000206 photolithography Methods 0.000 description 2
- 238000007517 polishing process Methods 0.000 description 2
- 229920000090 poly(aryl ether) Polymers 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- FEBFYWHXKVOHDI-UHFFFAOYSA-N [Co].[P][W] Chemical compound [Co].[P][W] FEBFYWHXKVOHDI-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Natural products C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 description 1
- 150000001454 anthracenes Chemical class 0.000 description 1
- 150000008378 aryl ethers Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 235000014171 carbonated beverage Nutrition 0.000 description 1
- 230000008859 change Effects 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
- 239000013078 crystal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- HELHAJAZNSDZJO-OLXYHTOASA-L sodium L-tartrate Chemical compound [Na+].[Na+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O HELHAJAZNSDZJO-OLXYHTOASA-L 0.000 description 1
- 239000001433 sodium tartrate Substances 0.000 description 1
- 229960002167 sodium tartrate Drugs 0.000 description 1
- 235000011004 sodium tartrates Nutrition 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
- H01L21/02—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
-
- 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
- H01L21/71—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
- H01L21/76802—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 by forming openings in dielectrics
- H01L21/76814—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 by forming openings in dielectrics post-treatment or after-treatment, e.g. cleaning or removal of oxides on underlying conductors
-
- 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
- H01L21/02—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
- H01L21/283—Deposition of conductive or insulating materials for electrodes conducting electric current
- H01L21/288—Deposition of conductive or insulating materials for electrodes conducting electric current from a liquid, e.g. electrolytic deposition
-
- 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
- H01L21/71—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
- H01L21/76802—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 by forming openings in dielectrics
- H01L21/76807—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 by forming openings in dielectrics for dual damascene structures
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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
- H01L21/71—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
- H01L21/76802—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 by forming openings in dielectrics
- H01L21/76807—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 by forming openings in dielectrics for dual damascene structures
- H01L21/76808—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 by forming openings in dielectrics for dual damascene structures involving intermediate temporary filling with material
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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
- H01L21/71—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
- H01L21/76838—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 conductors
- H01L21/76841—Barrier, adhesion or liner layers
- H01L21/76843—Barrier, adhesion or liner layers formed in openings in a dielectric
- H01L21/76844—Bottomless liners
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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
- H01L21/71—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
- H01L21/76838—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 conductors
- H01L21/76877—Filling of holes, grooves or trenches, e.g. vias, with conductive material
- H01L21/76879—Filling of holes, grooves or trenches, e.g. vias, with conductive material by selective deposition of conductive material in the vias, e.g. selective C.V.D. on semiconductor material, plating
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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
- H01L21/71—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
- H01L21/76838—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 conductors
- H01L21/76885—By forming conductive members before deposition of protective insulating material, e.g. pillars, studs
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2221/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof covered by H01L21/00
- H01L2221/10—Applying interconnections to be used for carrying current between separate components within a device
- H01L2221/1005—Formation and after-treatment of dielectrics
- H01L2221/1052—Formation of thin functional dielectric layers
- H01L2221/1057—Formation of thin functional dielectric layers in via holes or trenches
- H01L2221/1063—Sacrificial or temporary thin dielectric films in openings in a dielectric
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
Description
A7 469587 ____B7__ 五、發明說明(1 ) 免盟.背景 發明领域 本發明係關於一半導體裝置。更明確地説,本發明係關 於一具有一掩埋式引線結構之半導體裝置,且該掩埋式引 線結構之電遷移電阻受到改良。本發明也係關於一用以製 造前所提及之半導體裝置之程序。 以前技術 在受到高度整合之半導體裝置,例如極大型積體電路 (ULSI) ’中’較高速之信號傳輸與對於嚴重電遷移問題之 較高電阻以降低功率消耗皆是必要的。 傳統上,做爲LSI之引線之材料,一鋁合金(例如,鋁_ 0·:)°/。銅,鋁-1%矽-0,5%銅,等等)受到使用。除此之外,使 用具有低於銘合金之電阻率之銅來做爲引線之材料對於進 一步增加裝置之速度很有效。銅具有低至大約i8wcm之電 阻率,且其之優點不僅在於其對於增加裝置之速度很有效 ,而且在於其具有高於鋁太約10倍或更多之電遷移電阻。 因此,銅預期可做爲鋁合金之替代物以充當引線之材料。 做爲製造銅引線之一程序,近年來一雙嵌刻程序受到研 究。此程序是下列程序:形成於一絕緣薄膜之—通孔及圖 樣化於一引線結構之—壕溝是利用銅來插塞,且接著,過 多之銅是藉由化學機械研磨程序來移除,因而製造—鋼引 線。關於雙嵌刻程序,吾人曾對於下列事項做過各種研究 :形成一通孔之絕緣薄膜材料之選擇,形成藉由—引線來 插塞之壕溝之絕緣薄膜材料的選擇,以及處理該等材料之 -4 - 本紙張尺度適财S國家標準(C.NS)A4規格(210 X 297公餐) -------------Λ.-------訂--------線 (請先閱讀背面之注意事瑣再填寫本買) 經濟部智慧財產局員工消費合作社印製 經濟部智慧財產局員工消費合作社印製 469587 A7 —-_B7 五、發明說明(~ 方法。 另-方面’自達成裝置之高可靠度之觀點來看 工作是獲得高電遷移電阻,且如前所提及,據報導鋼之電 遷移電阻高於鋁之電遷移電阻大約i〇倍或更多。 但是,在發生於通孔之電遷移中,銅 a j屌卞足泥動率之變 化發生於存在於通孔I底邵份之銅與障礙層間的界面,且 在此界面,障礙層抑制銅之漂移,以致銅未受到供應,因 而造成一空穴。 、 發明插要 在此種情形之下,本發明之發明者已進行廣泛及嚴密之 研死,以試圖解決伴随於以前技術之前所提及之問題。結 枣’意外發現一特定半導體裝置之優點不僅在於其具有改 良之電遷移電阻,而且其具有一引線結構,以致可靠度很 高且電阻率很低。此種特定半導體裝置包含一基板;形成 於該基板之第一金屬引線’其中第一金屬引線包含一金屬 * —形成於該基板以覆蓋第一金屬引線之絕緣薄膜;—形 成於該絕緣溥膜之壕溝;一形成於該絕緣薄膜以自該壕溝 達到第一金屬引線之通孔:一插塞該通孔之金屬插塞,其 中該金屬插塞包含相同於第一金屬引線之金屬,且受到形 成以直接接觸第一金屬引線及達到該壕溝之内部;與形成 於該壤溝以直接連接至該金屬插塞之第二金屬引線,其中 第二金屬引線包含相同於該金屬插塞之金屬。本發明是基 於前述之新奇發現來完成。 因此,本發明之一目標是提供一半導體裝置,該半導體 本紙張尺度適用中圉國家標準(CNS)A4規格(210 X 297公釐) I I ------ - I I I r 1 I I I — — — — t (請先閲讀背面之注意事項奔填莴本頁) 4 6 9 5 8 7 A7 B7 五、發明說明(3 ) 裝置在金屬插塞及第一金屬引線間之界面與金屬插塞及弟 二金屬引線間之界面未由於電遭移而發生空穴,且因此具 有改良之電遷移電阻及一引線結構,以致可靠度很高且電 阻率很低= 本發明之另一目標是提供一有利程序,以製造前所提及 之卓越半導體裝置。 附圖簡短説明 參照附圖來閱讀本發明之目前較佳示範實例之下列説明 ,熟悉本技術領域者應可明瞭本發明之前述及其他目標, 特點與優點,其中: 圖1是展示一根據本發明一實例之半導體裝置之範例的示 意橫截面圖; 圖2A至2F是展示根據本發明之一實例來製造一半導體裝 置之一程序範例的示意橫截面圖;且 圖3A至3D是展示根據本發明之一實例來製造一半導體裝 置之一程序範例的示意橫截面圖(自圖2F繼續)。 較佳f例評細説明 在下文中,根據本發明之半導體裝置之一較佳實例將參 照圖1之示意橫截面圖來詳細說明,但是該實例不應解釋成 爲對於本發明之範疇造成限制。 如圖1所示’第一絕緣薄膜12是形成於利用,例如,一氧 化矽薄膜來形成於一矽基底材料11,因而構成一基板1〇。 —緣溝13形成於基板1〇 (第一絕緣薄膜12),且第一金屬引 線15經由一障礙層14形成於壕溝13之内表面s障礙層丨4是 -6 - 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) I n I n I H ί I n I (請先閲讀背面之注意事項再填寫本頁) 訂. .線 經濟部智慧財產局員工消費合作杜印t 經濟部智慧財產局員工消費合作社印*1^ 469587 A7 _______ B7 五、發明說明() 利用,例如,氮化钽來形成,且第一金屬引線15是利用, 例如,銅來形成。另外’第一絕緣薄膜12與第一金屬引線 15之表面受到平坦化以位於相同之平面s 抗氧化薄膜16形成於第一絕緣薄膜12以覆蓋第—金屬引 線1S ’其中第一絕緣薄膜12是利用,例如,氮化碎來製造 且具有100奈米之厚度。包含,例如,—低介電常數有機薄 膜且厚度爲400奈米之第二絕緣薄膜17形成於抗氧化薄膜16 。可使用下列材料來做爲此低介電常數有機薄膜•例如, 通常稱爲多芳基乙醚(polyaryl ether)之有機聚合物(例如美 國Dow化學公司製造及販售之SILK (商標美國 AUiedSlgnai公司製造及販售之FLARE (商標);美國
SchUmacher公司製造及販售之VELOX (商標),等等),或氟 碳酸鹽(f!u〇rocarb〇n)(例如環狀氟樹脂,Tefj[〇n⑧,非結晶 Teflon,氟化芳基乙醚,氟化聚亞醯胺,等等在此實例 中,舉例而言,有機薄膜是利用SILK來形成, 另外,一包含,例如一氮化矽薄膜且厚度爲丨〇〇奈米之中 間絕緣薄膜18形成於第二絕緣薄膜17。包含,例如,_低 介面常數有㈣膜且厚度爲彻奈米之第三絕㈣膜Η形成 於Θ中間絕緣薄膜18。相同於前述之材料可做爲此低介面 常數有機薄膜。因此,—絕緣薄膜2〇,其中—金屬引線及 插塞二到形成’疋利用第二絕緣薄膜17,中間絕緣薄膜 18與第三絕緣薄膜〗9來構成。 豪溝2i形成於絕緣薄膜2()(第三絕緣薄膜丨9與中間絕緣 薄膜18)° 一防止金屬(例如銅)擴散之擴散防止層22形成於
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4 69 587 經濟部智慧財產局員工湞費合作社印製 A7 B7 五、發明說明() 壕溝21之内表面(側壁與底部份),且該擴散防止層^是利用 ,例如’一氮化叙薄膜來製造且厚度爲5〇奈米。另外,一 通孔23形成於擴散防止層22,絕緣薄膜2〇 (第二絕緣薄膜 17)與抗氧化薄膜16,以達到第一金屬引線15。 除此之外,經由通孔23之側壁來暴露之抗氧化薄膜16形 成於一絕緣部份22i ’且絕緣部份22i是藉由,例如,一氧化 程序來受到電氣絕緣。 另外,一用以插塞通孔23且包含相同於第—金屬引線15 之金屬(銅)之金屬插塞24形成於通孔23,以直接連接至第一 金屬引線15及達到壕溝21之内部。包含相同於金屬插塞 之金屬(銅)之第二金屬引線25經由擴散防止層22形成於壕溝 21’以直接連接至金屬插塞24 ^除此之外,—覆蓋第二金 屬引線25之抗氧化薄膜26形成於絕緣薄膜2〇,其中抗氧化 薄膜26是利用,例如,氮化矽薄膜來製造且厚度爲1〇〇奈 米。 在前述之半導體裝置中,一低介電常數有機薄膜是做爲 第二絕緣薄膜17,但是’例如,也可使用氧化矽薄膜^這 是因爲只有通孔23形成於第二絕緣薄膜丨7 ,且因此,即使 當第二絕緣薄膜17是利用氧化矽薄膜來形成時,諸引線間 之電容未出現增加’而電容增加會對於電氣特性,例如伊 號延遲等等,會造成負面影響。 另外’擴散防止層22不僅可利用氮化钽來形成,而且可 利用下列材料來形成:鎢磷鈷,氮化鈦,氮化鎢,氮化錐 ,氮化铪’鈷,鎢,氮化矽,碳化鈦,氮氡化矽,等等。 本紙張尺度適用中國國家標準(CNS)A4規格(210 * 297公釐) ----------I---矣-------- 訂--------線 ί-*···1 (請先閱讀背面之注意事項再填寫本頁) 469587
五、發明說明( 經濟部智慧財產局員工消費合作社印製 料當中,當擴散防止層22是利用-絕緣薄膜,例 口氛梦’碳㈣,氮氧化㈣等,㈣成時,則益需+ 氣絕緣擴散防止層22,而擴散b I 呢 壁來受到暴露。 ’散万止層22心㈣孔23之倒 在則述之半導體裝置中’構成下層引線之第—金屬料 15’構成上層引線之第二金屬引線乃,與連接第—金屬引 線Η及第二金屬引線25之金屬插塞24皆是利用相同金屬⑻ 來形成,>X致㈣是在無外來材料穿越之下彼此直接連接 。因此,金屬插塞24及第一金屬引線〖5間之界面與金屬插 塞24及第二金屬引線25間之界面由於電遷移所產生之空穴 受到抑制》換句話說,不同材料間之界面未受到形成二 致銅原子之流動率變爲恆定,且電遷移電阻獲得改善,因 而獲得高可靠度之銅引線。另外,如前所提及,不同材料 間之界面未形成於第一金屬引線15,金屬插塞以及第二金 屬引線25間之任何界面,且因此,可獲得—具有低電阻率 之引線結構。 接著,下文將參照圖2八至2?與3A至3D之示意橫截面圖詳. 細説明’根據本發明,來製造—半導體裝置之程序之—較 佳實例。在圖1,圖2A至2F,與圖3A至3D中,類似之組件 或部份是以類似之參考號碼來顯示。 如圖2A所示’第一絕緣薄膜丨2是利用,例如,氧化碎薄 膜來形成於一基底材料(例如妙基底材料)11,因而構成某 板。接著,第一金屬引線是藉由單一雙嵌刻程序來形成 °明確地説,一壕溝13是藉由下列方式來形成於基板〖〇 (第 9 - 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) illlllljlll I I I I ί ! I — — — — — — — ! (請先閱讀背面之注意事項再填寫本頁) 469537 A7 B7 經濟部智慧財產局員工消費合作社印製 五、發明說明( —絕㈣㈣):首先是尋常之光刻技術與乾㈣刻技術, 隨後疋用於乾性敍刻程序之光阻遮罩之移除。接著, 礙層咐利用,彳“,氮健㈣成於壤溝13之内表面。 隨後,銅受到沉積以藉由-沉積程序,例如錢艘技術,灰 電極電銳技街等等,來插塞壞溝13,且接著,第一絕緣薄 膜12上之過多飼與過多障礙層14是藉由,例如,一化 械研磨程序來移除,因而形成第-金屬引線15,其中第— 金屬引線15包含穿⑽礙層14之縣13之鋼。 接者’用以覆蓋第-金屬引線15之抗氧化薄膜16是藉 由沉積,例如,氮切來形成於第一絕緣薄郎’以致^ 一還原氣體中藉由’例如’ i鍍程序或-化學氣相沉積 (CVD)程序來具有1〇〇奈米之厚度。 ' 除I:之外罘一絕緣薄膜17是藉由下列方式來形成於抗 氧化薄膜16 : #由,例如,—施加方法,例如,來沉積— 低介電常數有機薄膜以具有彻奈米之厚度。下列材料可做 爲該低介電常數有機薄膜:例如,通常稱爲多芳基乙醚 (polyaryl ether)之有機聚合物(例如美國D〇w化學公司製造 及販。之SILK (商才票);美國A1IiedSignaI公司製造及販售之 FLARE .(商標)’·美國Schumacher公司製造及販售之 VEL〇X (商標)’等等),或氟碳酸鹽(fluorocarbon)(例如, 環狀氟樹脂’ Teflon®,非結晶丁的⑽,氟化芳基乙越,氣 化聚亞醯胺,等等)。在此實例中,舉例而言,有機薄膜是 利用SiLK來形成。在前述施加方法之後,在300至45(rc之 下烘焐及硬化焚到執行以移除—溶劑,因而獲得第二絕緣 -10-
本紙張尺度適用中@13冢榇準(CNS)A4規格咖X 297公爱T ^------ί訂--------,線 ί靖先閱讀背面之注音?事項再填寫本頁) 469587 經濟部智慧財產局員工消費合作杜印製 A7 B7 五、發明說明(8 ) 薄膜17。 另外,一中間絕緣薄膜18是藉由下列方式來形成於第二 絕緣薄膜17上:例如藉由-CVD程序來沉積一氮化矽薄膜 以具有100奈米之厚度。接著,第三絕緣薄膜19是藉由下列 方式來形成於中間絕緣薄膜18上:例如,沉積一低介電常 數有機薄膜以具有400奈米之厚度。此低介電常數有機薄膜 可藉由相同方法以相同於前述之材料來形成。因此,_絕 緣薄膜2 0疋利用第—絕緣薄膜〗7,中間絕緣薄膜18與第三 絕緣薄膜19來形成,其中一金屬引線及一插塞形成於絕緣 薄膜20。 接著’一無機光罩(未受到展示)是藉由,例如,氮化矽來 形成於第三絕緣薄膜19,其中該無機光罩充當一用於蝕刻 之光罩’以形成一壕溝於第三絕緣薄膜丨9,且接著,使用 光罩來蚀刻第三絕緣薄膜19。另外,中間絕緣薄膜18受到 選擇性蝕刻。因此’ 一用以形成一金屬引線於絕緣薄膜2〇 ( 第三絕緣薄膜19與中間絕緣薄膜18)之壕溝21受到形成。前 所提及之無機光罩是與中間絕緣薄膜18之蚀刻同時藉由蝕 刻來移除。除此之外,前述之無機光罩可藉由下列方式來 形成:沉積一氮化碎薄膜,且使用尋常之光刻技術及—乾 性蝕刻技術來圖樣化〇 接著,如圖2B所示,一用以防止金屬(例如銅)之擴散之擴 散防止層22是藉由下列方式來形成於壕溝2 1之内表面(侧壁 及底部份):例如,藉由一濺鍍程序來沉積氮化备以具有5 0 奈米之厚度。另外,一充當蝕刻程序之光罩之絕緣薄膜41 -11 - 本紙張尺度適用中國國家標準(CNS)A4規格(210 * 297公爱) --------------气--------.訂--------Γ-線 (請先閱讀背面之;i意事項再填寫本頁) A7 469587 ---— __ B7__ 五、發明說明(9 ) 是藉由下列方式來形成:例如,藉由—CVD程序來沉積氧 化矽以具有5〇奈米之厚度。 (請先闉讀背面之注意事項再填g本頁) 接著,如圖2C所示,一光阻薄膜42是藉由尋常之施加技 術來形成於絕緣薄膜4丨,且接著,一開啓—通孔之開啓部 份43是藉由一光刻技術來形成。隨後,絕緣薄膜ο是使用 光阻薄膜42做爲蚀刻程序之光軍來受到蝕刻,因而形成一 開啓部份44。 接著,如圖2D所示,一通孔23是藉由使用光阻薄膜心(請 參看圖2C)與絕緣薄膜41來形成於擴散防止層22與絕緣薄膜 (第二絕緣薄膜17)。在此階段中,通孔23尚未受到形成 以穿透抗氧化薄膜16,丑因此通孔23未達到第—金屬引線 15。在第二絕緣薄膜1?之蝕刻中,光阻薄膜42也是藉由蝕 刻程序來移除。 經濟部智慧財產局員工消費合作社印製 接著,如圖2E所,經由通孔23之侧壁受到暴露之擴散 防止層22是藉由—氧化程序來受到電氣絕緣,因而形成一 絕緣部份22〗。此氧化程序是藉由,例如,在大約3 〇〇(>c下使 得該層暴露於一氧電漿氣體大約一分鐘來進行。藉由形成 I絕緣邵份22ι,在隨後步驟之電鍍程序期間,擴散防止層 22未由於電鍍程序而出現原子核成長。 接著,如圖2F所示,抗氧化薄膜16是利用絕緣薄膜4丨做 爲蝕刻程序之光罩來受到蝕刻,因而允許通孔23穿透抗氧 化薄膜16以達到第一金屬引線15。 接著,如圖3A所示,相同於第—金屬引線15之金屬之銅 -12· 本紙張尺㈣財關家標準(CNS)A4規格(210 =< ^¥3 4 〇9 587 A7 B7 經濟部智慧財產局員工消费合作社印製 五、發明說明( 是藉由無電極電艘程序以可自第—金屬引線15成長,以致 插塞通孔23,且可進-步成長以達到壕抑之内部,因而 形成-金屬插塞24。無電極電鍍之條件是,例如,以致使 用一包含7…之CuS〇4 . 5H2〇,2〇 _之福馬林(37% HCH〇),1〇g/I之Na〇H,20的之酒石酸納卸,與非常少 量之安定劑及-濕性媒介之溶液,來做爲電艘液,且電鍍 液之溫度是50°C。 接著’絕料膜是藉由-簡程序來㈣,且擴散防 止層22可如圖3 B所示受到暴露a 隨後,如圖3C所示,一電鍍種子層31是藉由下列方式來 形成於擴散防止層22之表面上:例如藉由—濺鍍程序來沉 積銅以具有200奈米之厚度。接著,一銅薄膜32是藉由下列 方式來形成於電鍍種子層31上:例如藉由一電鍍程序來沉 積銅以致具有1.00微米之厚度。電鍍程序之條件是,例如 ,以致CuS〇4 . 5H2〇是用於一電鍍液,一銅板做爲陽極,電 鍍液之溫度是30aC,施加之電壓是10 v,且電流是2〇以加2。 接著,絕緣薄膜20上之過多銅薄膜32,過多電鍍種子層 31與過多擴散防止層22是藉由一化學機械研磨程序來移除 ,且,如圖3D所示,第二金屬引.線25形成於壕溝21以直接 連接至金屬插塞24,其中第二金屬引線25包含相同於金屬 插塞24之金屬(銅)’且包含銅薄膜32及電鍍種子看3丨。随後 ,一覆蓋第二金屬引線25之抗氧化層26是藉由下列方式來 形成於絕緣薄膜2〇 :例如,沉積一氮化矽薄膜以具有1 〇〇奈 米之厚度。 -13- 本紙張尺度適用中國國家標準(CnS)A4規格(210 X 297公釐) ^--------訂--------τι線 (請先閱讀背面之注意事項再填寫本蒽) 經濟部智慧財產局8工消費合作社印製 469587 A7 -一 B7 五、發明說明(11 ) 在前述之製造程序中,做爲第二絕緣薄膜17一 常數有機薄膜受到使用,但是,例如,—氧切薄膜也; 叉到使用。這是因爲,即使當第二絕緣薄膜17是利用一氧 化秒薄膜來形成時,只有通孔23形成於第二絕緣薄膜η, 諸引線間之電容未出現增加,而電容增加對於電氣特性, 例如信號延遲等等,會造成負面影響。 另外,擴散防止層22不僅可利用氮化钽來形成,而且可 利用下列材料來形成:鶴磷姑,氣化欽,氮化鶴,氮化結 ,氮化給’姑’鹤’氣化碎,碳化飲,氮氧化硬,等等。 在這些材料當中,當擴散防止層22是利用—絕緣薄膜,例 如氮化砂,碳化欽,氮氧化梦等等,來形成時,則無需電 氣絕緣擴散防止層22,而擴散防止層22是經由通孔23之側 壁來受到暴露。 在製造一半導體裝置之前述程序中,構成下層引線之第 一金屬引線15,構成上層引線之第二金屬引線25,與連接 第一金屬引線15及第二金屬引線25之金屬插塞μ皆是利用 相同金屬(銅)來形成,以致他們是在無外來材料穿越之下彼 此直接連接。此種結構等效於第—金屬引線丨5,金屬插塞 24與第—金屬引線25是利用相同金屬(銅)整合受到形成之結 構。因此,金屬插塞24及第一金屬引線15間之界面與金屬 插塞24及第二金屬引線25間之界面由於電遷移所產生之空 穴受到抑制。換句話説’不同材料間之界面未形成於第— 金屬引線15 ’金屬插塞24與第二金屬引線25間之任何界面 ’以致銅原子之流動率變爲恆定,且電遷移電阻獲得改善 本紙張尺度通用中囷國家標準(CNS)A4規格(210 X 297公S ) -------------"--------訂--------線--( (請先閱讀背面之注意事項再填寫本頁) 469587 A7 '------SI_____ 五、發明說明(12 ) a因此’獲得—具有高可靠度之銅引線結構。另外,如前 所提及’不同材料間之界面未形成於第一金屬引線15,金 屬插塞24及第二金屬引線25間之任何界面,且金屬插塞24 是藉由無電極電鍍來形成,以致相當大之結晶獲得成長, 因而可獲得一具有低電阻率之引線結構。 本發明(半導體裝置之優點在於,因爲構成下層引線之 第—金屬引線,構成上層引線之第二金屬引線,與連接第 金屬引線及第二金屬引線之金屬插塞皆是利用相同金屬 來形成,以致他們彼此直接連接,且因此不同材料間無界 面,金屬插塞及第一金屬引線間之界面與金屬插塞及第二 金屬引線間之界面由於電遷移而發生空穴受到抑制,以致 電遷移電阻可獲得改善,因而獲得一具有高可靠度及低電 阻率之引線結構。 另外,藉由本發明之程序’可獲得前所提及之卓越半導 體裝置。 1 _ — III —--— II - i I I I - i - I illllllj — I I (請先閱讀背面之注意事項再填寫本頁} 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準(C;NS)A4規格(210 X 297公笼)
Claims (1)
- 469587 AS B8 C8 D8 經濟部智慧財產局員工消費合作社印製 六、申請專利範圍 1, 一種半導體裝置,包含: 一基板; 形成於該基板之第一金屬引線,該第一金屬引線包含 一金屬; 形成於該基板之一絕緣薄膜,以覆蓋該第一金屬引線; 形成於該絕緣薄膜之~壞溝; 形成於該絕緣薄膜之—通孔,以自該壕溝達到該第— 金屬引線; 用以插塞該通孔之一金屬插塞,該金屬插塞包含相同 於該第一金屬引線之金屬,且受到形成以致直接連接至 .該第一金屬引線,及達到該壕溝之内部;與 形成於該壕溝以直接連接至該金屬插塞之第二金屬引 線’該第二金屬引線包含相同於該金屬插塞之金屬。 2·如令請專利範圍第1項之半導體裝置,進一步包含一防止 遠金屬之擴數之擴散防止層’其中該擴散防止層形成於 該緣溝之側壁及底部份。 3,如申請專利範圍第2項之半導體裝置,其中經由該通孔之 側壁來暴露之該擴散防止層的至少一部份受到電氣絕緣。 4·如申請專利範圍第1項之半導體裝置,其中該第一金屬引 線之該金屬是銅。 5· 一種製造一半導體裝置之程序,包含下列步驟: 形成第一金屬引線於一基板,該第一金屬引線包含一 金屬: 形成一絕緣薄膜於該基板,以覆蓋該第一金屬引線; -16- -----------I----^-------訂--------.線ί — d — (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) 經濟部智慧財產局員工消費合作社印製 6 9 5 8 7 B8 C8 D8六、申請專利範圍 形成一壕溝於該絕緣薄膜; 形成一通孔於該絕緣薄膜,以自該壕溝達到該第一金 屬引線; 藉由允許相同於該第一金屬引線之金屬成長於該第一 金屬引線,形成一金屬插塞,以插塞該通孔及達到該壕 溝之内部;且 在該壕溝中,形成包含相同於該金屬插塞之金屬之第 二金屬引線,以直接連接至該金屬插塞。 6. 如申請專利範圍第5項之程序,該程序進一步包含下列步 驟:在形成該壕溝之後及在形成該通孔之前,形成一擴 散防止層,以防止該壞溝之側壁及底部份之該金屬的擴 散0 7. 如申請專利範圍第6項之程序,該程序進一步包含下列步 驟··在允許該通孔穿透之前,電氣絕緣經由該通孔之側 壁來暴露之該擴散防止層。 8. 如申請專利範圍第7項之程序,其中電氣絕緣該擴散防止 層之該步驟是藉由,氧化經由該壕溝之側壁來暴露之該 擴散防止層之部份來達成。 9. 如申請專利範圍第5項之程序,其中該第一金屬引線之該 金屬是銅。 1 — I I I I 1 I I ---------i «—— — — — II Ί I I ^ . (請先閱讀背面之注意事‘項再填寫本頁) -17- 本紙張又度適用中國國家標準(CNS)A4規格(210 X 297公« )
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JP2000269342A (ja) * | 1999-03-12 | 2000-09-29 | Toshiba Microelectronics Corp | 半導体集積回路および半導体集積回路の製造方法 |
JP3184177B2 (ja) * | 1999-03-26 | 2001-07-09 | キヤノン販売株式会社 | 層間絶縁膜の形成方法、半導体製造装置、及び半導体装置 |
JP4063619B2 (ja) | 2002-03-13 | 2008-03-19 | Necエレクトロニクス株式会社 | 半導体装置の製造方法 |
JP2004304167A (ja) * | 2003-03-20 | 2004-10-28 | Advanced Lcd Technologies Development Center Co Ltd | 配線、表示装置及び、これらの形成方法 |
KR20090035127A (ko) * | 2007-10-05 | 2009-04-09 | 주식회사 하이닉스반도체 | 반도체 소자의 금속배선 형성방법 |
US7879720B2 (en) * | 2008-09-30 | 2011-02-01 | Samsung Electronics Co., Ltd. | Methods of forming electrical interconnects using electroless plating techniques that inhibit void formation |
KR102582523B1 (ko) * | 2015-03-19 | 2023-09-26 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | 반도체 장치 및 전자 기기 |
US10658233B2 (en) * | 2018-10-17 | 2020-05-19 | International Business Machines Corporation | Dielectric damage-free dual damascene Cu interconnects without barrier at via bottom |
KR102674584B1 (ko) | 2019-01-04 | 2024-06-11 | 삼성전자주식회사 | 반도체 장치 |
CN113140501B (zh) * | 2020-01-17 | 2024-10-15 | 长鑫存储技术有限公司 | 半导体器件及其制备方法 |
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