TWI276184B - Methods for producing electrode and semiconductor device - Google Patents
Methods for producing electrode and semiconductor device Download PDFInfo
- Publication number
- TWI276184B TWI276184B TW090121852A TW90121852A TWI276184B TW I276184 B TWI276184 B TW I276184B TW 090121852 A TW090121852 A TW 090121852A TW 90121852 A TW90121852 A TW 90121852A TW I276184 B TWI276184 B TW I276184B
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- Prior art keywords
- forming
- conductor layer
- film
- integrated circuit
- insulating film
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims description 36
- 239000004020 conductor Substances 0.000 claims abstract description 43
- 238000004519 manufacturing process Methods 0.000 claims abstract description 24
- 230000004888 barrier function Effects 0.000 claims description 48
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 24
- 229910052802 copper Inorganic materials 0.000 claims description 24
- 239000010949 copper Substances 0.000 claims description 24
- 239000000758 substrate Substances 0.000 claims description 10
- 229910052732 germanium Inorganic materials 0.000 claims description 5
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 5
- 238000000059 patterning Methods 0.000 claims description 2
- 239000012212 insulator Substances 0.000 claims 2
- 235000015067 sauces Nutrition 0.000 claims 1
- 235000012431 wafers Nutrition 0.000 description 17
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 14
- 229910052751 metal Inorganic materials 0.000 description 13
- 239000002184 metal Substances 0.000 description 13
- 238000005229 chemical vapour deposition Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 6
- 230000001681 protective effect Effects 0.000 description 6
- 238000009792 diffusion process Methods 0.000 description 5
- 238000005530 etching Methods 0.000 description 5
- 238000001020 plasma etching Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 238000001459 lithography Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 150000004767 nitrides Chemical class 0.000 description 3
- 238000005121 nitriding Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 2
- 239000005751 Copper oxide Substances 0.000 description 2
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 2
- KZNMRPQBBZBTSW-UHFFFAOYSA-N [Au]=O Chemical compound [Au]=O KZNMRPQBBZBTSW-UHFFFAOYSA-N 0.000 description 2
- 229910000431 copper oxide Inorganic materials 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 229910001922 gold oxide Inorganic materials 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229920002120 photoresistant polymer Polymers 0.000 description 2
- 229910001925 ruthenium oxide Inorganic materials 0.000 description 2
- WOCIAKWEIIZHES-UHFFFAOYSA-N ruthenium(iv) oxide Chemical compound O=[Ru]=O WOCIAKWEIIZHES-UHFFFAOYSA-N 0.000 description 2
- 229910052715 tantalum Inorganic materials 0.000 description 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910000449 hafnium oxide Inorganic materials 0.000 description 1
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- ZVWKZXLXHLZXLS-UHFFFAOYSA-N zirconium nitride Chemical compound [Zr]#N ZVWKZXLXHLZXLS-UHFFFAOYSA-N 0.000 description 1
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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
- H01L21/71—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
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- H01L21/50—Assembly of semiconductor devices using processes or apparatus not provided for in a single one of the subgroups H01L21/06 - H01L21/326, e.g. sealing of a cap to a base of a container
- H01L21/60—Attaching or detaching leads or other conductive members, to be used for carrying current to or from the device in operation
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- 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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- 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
- H01L21/7688—Filling of holes, grooves or trenches, e.g. vias, with conductive material by deposition over sacrificial masking layer, e.g. lift-off
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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
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- H01L21/76885—By forming conductive members before deposition of protective insulating material, e.g. pillars, studs
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- H01L23/522—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body
- H01L23/532—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body characterised by the materials
- H01L23/53204—Conductive materials
- H01L23/53209—Conductive materials based on metals, e.g. alloys, metal silicides
- H01L23/53228—Conductive materials based on metals, e.g. alloys, metal silicides the principal metal being copper
- H01L23/53238—Additional layers associated with copper layers, e.g. adhesion, barrier, cladding layers
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- H01L2224/12—Structure, shape, material or disposition of the bump connectors prior to the connecting process
- H01L2224/13—Structure, shape, material or disposition of the bump connectors prior to the connecting process of an individual bump connector
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Description
1276184 五 、發明説明( 發明背景 1 ·發明領域 本發明涉及製造電極及半導俨、 之,本發明涉及製造小尺寸:二裝及置二万二:㈣ 製造配備該電極之半導體裝置之方法^又半導體裝置及 2 ·相關技藝說明 在過去數年中,半導體製程已進 台匕敕人艺-7 w L ^ 疋了主可將终多不同的功 ::正合至早一個晶片中。因為需要組合不同的製程,所以 秋的步驟會增加,良率會降低,以及轉迴時間會辦加。 :::近年來’製造不同功能之各積體電路心並將之 封i於早一晶片中(即’使用多晶片模組(MCM)),使它們 具有相同的效能,已成為常例。 具體言之’有-種方法,乃先將晶片安㈣—稱之為介 片《有機或陶竞板上(該介片上已事先鋪設互連線),然後 使用導線接合的方式將積體電路晶片的焊墊與介片的焊墊 相連接,以形成該各積體電路晶片間之介面。或者是另一 種方法’事先以金或料,於龍電路晶片上形成凸塊(突 出電極),然後將介片上之焊墊與該等凸塊相連接。 不過,在上述之相關技藝方法中’為使導線接合的連接 穩固,積體電路晶片上之焊墊其所需的連接區域不可小於 5 0 X 5 0平方微米,而間距也不可小於7〇至8〇微米,以避免 碰觸到鄰近的導線或凸塊。 因此,由於有上述的原則,所以縱使將積體電路晶片上 所有可用的區域均變成焊墊,焊墊的數目最多也僅數百
72330-950926.DOC 本纸最尺度適用中國國家標準(CNS) A4規格(210X297公釐) I276184
個。更何況,若使 於晶片的四周。 用的是導線接合法,則焊墊還僅能配置 Q此田而要超過1 〇〇〇個以上的連接時,MCM法將派不 上用場。若是如此’戶斤有的功能均需提供在單一個晶片 目 相關技藝方法有-個壞處,那就是晶片間可連線的數 受到極大的限制。 發明摘要 一才疋供出一種方法,可製造出使晶片間有能力做出相關技 藝中所做不到的超過1〇〇〇個以上的互連線之電極,以及不 受晶片間連接數目影響之高精密度小電極,是本發明之目 標。 提供出一種方法,·可製造出配備該種電極之半導體裝 置,是本發明之另一目標。 為達成第一目標,根據本發明之第一面向,提供出一種 方法’於其上形成有半導體積體電路元件及互連圖案之半 導體晶片上,製造出用以形成至少一個電極之電極;此方 法所包含之步驟:於該半導體晶片之互連圖案上,形成一 絕緣薄膜,於該絕緣薄膜上形成一具有開口之遮罩層,該 開口為該電極的形成位置,使用該遮罩層為遮罩,將該開 口内之絕緣薄膜予以去除,以曝露部分的互連圖案,於該. 曝露的互連圖案以及遮罩層之上,形成一導體層,去除形 成於該等遮罩層之上的導體層,留下形成於該曝露的互連 圖案上之導體層,以及去除該遮罩層。 -6 -
72330-950926.DOC 本紙張尺度適用中國國家標準(CNS) A4規格(210X 297公羞) 1276184 A7 B7 五、發明説明(3 ) 譬如,形成該導體層之步驟包含以銅形成該導體層之步 驟。 在此情況中,該方法尚包含之步驟:在將部分的互連圖 案予以曝露之後但該導體層尚未形成之前,於該曝露的互 連圖案及該遮罩層之上,形成一障壁薄膜。之後,形成該 導體層之步驟包含:於該障壁薄膜上,形成該導體層之步 驟,而去除該導體層之步驟則包含··去除形成於該遮罩層 上之障壁薄膜及導體層,留下形成於該曝露的互連圖案上 之障壁薄膜及導體層之步驟。 最好是,該方法另包含,在去除該遮罩層之後,於該導 體層之上,形成一保護薄膜。 根據本發明之第二面向,為達成上述目標,提供出一種 製造半導體裝置之方法,其所包含之步驟:於一基板上, 形成半導體積體電路元件,形成一内層絕緣薄膜,覆蓋該 半導體積體電路元件,形成一連接孔,用以將該半導體積 體電路元件與一該内層絕緣薄膜上之互連溝槽予以連接, 以一導電層將該連接及該互連溝槽予以埋藏,形成一互連 圖案,於該互連圖案上,形成一絕緣薄膜,於該絕緣薄膜 中形成一具有開口之遮罩層,該開口為該電極的形成位 置,使用該遮罩層為遮罩,將該開口内之絕緣薄膜予以去 除,以曝露部分的互連圖案,於該互連圖案以及遮罩層之 上,形成一導體層,去除形成於該等遮罩層之上的導體 層,留下形成於該互連圖案上之導體層,以及去除該遮罩 層0 72330-950926.DOC · / · 本紙張尺度適用中國國家標準(CNS) A4規格(210X 297公釐) 1276184 A7 B7
五、發明説明(4 另外’在多佈局層的互連情況中,該方法包含··於形成 該互連圖案之後及形成該絕緣薄膜之前,重複另形成二上 内層絕緣薄膜以覆蓋該互連圖案步驟之步驟,形成連1 = 以將該内層乡g、緣,薄月莫中之下互it圖案肖互連溝槽加以連接 之步驟,以及以-導體層將該連接孔及該互連溝槽加以埋 藏以形成一上互連圖案之步驟。另外,於該互連圖案上形 成絕緣薄膜之步騾包含:於該最上之互連圖案上,形成一 絕緣薄膜,而將部分之互連圖案予以曝露之步驟包含:將 部分之該最上互連圖案予以曝露。 根據本發明之用以製造電極及半導體裝置之方法,於形 成有半導體積體電路元件之基板上,形成内層絕緣薄膜^ 互連圖案’在形成互連圖案之後,形成絕緣薄膜及遮罩 層;於電極的形成位置上,形成一具有合理直徑之開口, 以一導體層(材質與互連線相同)將該開口予以埋藏;去除 該遮罩層;最後於該絕緣薄膜上,形成一突出之小電極(微 凸塊);不斷地重複上述步驟,形成電路。 準此,在製造半導體裝置之半導體積體電路元件的同 時,可形成高尺寸精密度之小電極。 另外,在以銅作為該導體層之材質時,為避免該會曝露 部分發生氧化,必須形成一由鎳或鋁所組成之保護薄膜 圖式之簡要說明 從以下配以附圖之較佳具體實施例之說明中,本發明之 上述目標及特性將益發地顯明,其中: 圖1是本發明具電極之半導體裝置的剖面圖; 72330-950926.DOC _ Q - 本紙張尺度適用中國國家標準(CNS) A4規格(210X297公董) 1276184 A7 ________B7 五、發明説明(~^~y '~ ---— 圖2A至2C是本發明具電極半導體裝置之製造方法步驟的 4面圖#其中圖2A是形成絕緣薄膜之圖式,圖Μ是形成用 乂形成第1連層之互連溝槽之圖式,以及圖2。是形成用 以形成障壁薄膜之層及用以形成第一互連層之層之圖式; 圖3A及3B乃延績圖2A至2C步驟之剖面圖,其中圖3八是 形成該障壁薄膜及該第-互連層之圖式,以及謂是形成 一氮化矽薄膜及一内層絕緣薄膜之圖式; /圖4A^4B乃延續圖3A&3B步驟之剖面圖,其中圖4A是 形成:氮化矽薄膜及一内層絕緣薄膜之圖式,圖4B是形成 用以形成第二·互連層之溝槽及形成連接孔之圖式; 圖5A及5B乃延續圖4A及4B步驟之剖面圖,其中圖5八是 形成障土薄膜之圖式,圖56是形成第二互連層之障壁薄膜 及金屬塞之障壁薄膜之圖式; 圖6A及6B乃延續圖5A及5B步驟之剖面圖,其中圖6八是 形成金屬塞及第二互連層之金屬層之圖式,圖66是形成第 二互連層及金屬塞之圖式; 圖7A及7B乃延績圖6A及6B步驟之剖面圖,其中圖7八是 形成用以形成電極之絕緣薄膜及阻膜之圖式,圖7B是形 電極開口之圖式; 圖8乃延績圖7 A及7 B步驟之剖面圖,其顯示形成障壁薄 膜之層及形成主電極之層;以及 ' 圖9A及9B乃延續圖8步驟之剖面圖,其中圖9八是形成障 壁薄膜及主電極之圖式,圖9B是形成電極之圖式。 較佳具體實施例之說明 9-
72330-950926.DOC 本紙張尺度適用中國國家標準(CNS) A4規格(21〇χ297公釐) 1276184 A7
以下配以附圖將說明本發明製造電極之方法及製造半導 體裝置之方法之較佳具體實施例。 圖1是本發明半導體裝置之剖面圖。 在圖m示之半導體裝2巾1基板1之上所形成的是譬 如A氧半(MOS)電晶體或其他的半導體積體電路元件, 以及一由氧料等所組成之内層絕緣薄膜2。用以形成第一 互連層 <互連溝槽21則形成於該内層絕緣薄膜2之中。該互 連溝抬2 1之内有一以埋藏法所形成,組成物為譬如氮化 鈦,用錄止銅以及該譬如由銅所組成之第一互連層擴散 之障壁薄膜 該内層絕緣薄膜2及該第_互連層4a之上則覆蓋了 一氮化 石夕薄膜5 ’用以阻止銅、由譬如氧化碎所組成之内層絕緣薄 膜6、氮化矽薄膜7以及由譬如氧化矽所組成之内層絕緣薄 膜8的擴散。用以形成第二互連層之互連溝槽81則形成於該 内層絕緣薄膜8及該氮化矽薄膜7之中。連接孔61形成於該 内層絕緣薄膜6及該氮化矽薄膜5之中,以電連接該第一互 連層4a及第二互連層。此外,於該互連溝槽81的侧壁上形 成一障壁薄膜9a,於該連接孔6丨的側壁上形成障壁薄膜 9b 0 3互連溝槽8 1及連接孔6 1乃是以銅或其他導電的物質埋 藏而成’藉以形成第二互連層l〇a及金屬塞丨〇b。 另外,内層絕緣薄膜8及第二互連層1〇a之上覆蓋了一譬 如,由氮化矽所組成之絕緣薄膜丨丨。並在絕緣薄膜丨丨中形 成一開口 111,再於該開口中形成一由譬如,氮化鈦所組成 72330-950926.DOC -10-
1276184 A7 ^__ B7 五、發明説明(7 ) 之障壁薄膜1 3 a,以阻止銅及由譬如,銅所組成之主電極 14a的擴散。於主電極i4a之上再覆蓋一層由譬如,氮/銘 所組成之保護薄膜1 5以保護包含該主電極I4a之金屬物質不 被氧化。 上述之主電極14a、障壁薄膜13a以及保護薄膜15形成― 電極1 6具有一部份突出於絕緣薄膜丨丨之上。 以下將說明其所§己備電極具上述組態之半導體裝置之製 造方法。 首先,如圖2A所示,譬如,於矽基板1之上沈積一金氧半 電晶體或其他的積體電路元件(未顯示),之後,以譬如, 化學氣相沈積(CVD)法沈積一厚度為譬如1微米之譬如,氧 化矽,以形成内層絕緣薄膜2。 接著,如圖2 B所示,利用譬如,微影技術,於該絕緣薄 膜中形成一具有開口之阻膜(未顯示),以於稍後做出可形 成該第一互連層之互連溝槽。以此阻膜為遮罩,使用譬 如,活性離子蝕刻(RIE)或其他的非等向性蝕刻法,於該内 層絕緣薄膜2中形成一深度為譬如,5〇〇毫微米之互連溝槽 2 1。成形之後,將該阻膜去除。 注意,在本具體實施例中,此步驟之後,需形成一連接 孔,以與形成於該矽基板上之金氧半電晶體或其他的積體 電路元件連接。但此部份之說明省略。 接著’如圖2C所示,以譬如,CVD法,於該内層絕緣薄 M2(包含了孩互連溝槽21)之上完全覆蓋沈積一厚度為 毫^政米之氮化欽’用以阶μ加彼、 J以防止銅擴散至孩内層絕緣薄膜2及用
72330-950926.DOC -11 -
1276184
以增強接合度,作為障壁薄膜層3,以及 米,以銅充作互連物質之第一互連層4。 一厚度為500毫微 ^著’如圖3A所*,將非互連溝槽21中的障壁薄膜層3 及罘-互連層4’以譬# ’化學機械研磨法(cMp)加以去 除,藉以形成障壁薄膜3a及第一互連層斗纹。 接著,如圖3B所示,以譬如,化學氣相沈積法,在該第 一互連層4a及該障壁薄膜3a及該内層絕緣薄膜2曝露部分 的整個表面上,沈積氮切及氧切,形成—#如,⑽毫 微米厚’用錄止該第—互連線中之銅擴散之氮财薄膜 5,以及一 500毫微米厚之内層絕緣薄膜6。 接著,如圖4A所示,以譬如,CVD法,於該内層絕緣薄 膜6的整個表面上,再沈積覆蓋氮化矽及氧化矽,形成一孽 如,⑽毫微米厚,用以阻止該第二互連線中之銅擴散之氮 化矽薄膜7,以及一 500亳微米厚之内層絕緣薄膜8。 接著,如圖4B所示,利用譬如,微影技術,於該絕緣薄 膜中形成一具有開口之阻膜(未顯示),以於稍後做出可形 成该第二互連層之互連溝槽。以此阻膜為遮罩,使用譬 如,RIE或其他的非等向性蝕刻法,於該内層絕緣薄膜8及 茲氮化矽薄膜7中形成一深度為譬如,5〇〇毫微米之互連溝 槽8 1。成形之後,將該阻膜去除。 此外,以譬如,微影技術,於該氮化矽薄膜7及該内層絕 、’彖薄膜8中’形成一具有開口之阻膜(未顯示),以於稍後形 成可將該第一及第二互連線予以連接之連接孔。以此阻膜 為遮罩,使用譬如RIE或其他的非等向性蝕刻法,於該氮化
72330-950926.DOC -12- 本紙張尺度適财@ @家標準(CNS) Μ規格(21GX297公爱) 裝 訂 線 1276184 A7 ____B7_ 五、發明説明(9 ) 梦薄膜7、内層絕緣薄膜6及氮化矽薄膜5中形成一譬如, 700亳微米厚,將該第一互連線4a之表面予以曝露之連接孔 6 1。成形之後,將該阻膜去除。 接著,如圖5 A所示,使用譬如,CVD法,於該第一互連 層4 a曝露於該連接孔6 1中的部分、該連接孔6丨的内部、該 内緣溝槽8 1的内部以及該内層絕緣薄膜8之上覆蓋沈積一譬 如’ 5 0毫微米厚之氮化鼓,以作為用來阻止銅擴散至該内 層絕緣薄膜以及接合黏著用之障壁薄膜層9。 接著,如圖5 B所示,使用譬如RIE法或其他的非等向性蝕 刻法加以回蝕,只留下互連溝槽81 (稍後要以此溝槽形成該 第二互連層)側壁部分以及連接孔6丨侧壁部分之障壁薄膜層 9,以形成阻止銅擴散至該第二互連層之障壁薄膜9a,以及 阻止來自於該金屬塞之銅擴散之障壁薄膜9b。 此處,由於在回蝕之後,該第一互連“所暴露之表面上 會形成氧化銅,所以要使用氧電漿、稀釋的氟化氫(HF)以 及虱氣的(hfac :錯合物)來去除形成於該第一互連4a表面 上之氧化銅以及蝕刻殘留物。 接著,如圖6 A所示,使用譬如,CVD法,在該第一互連 4 a曝露於該連接孔6 1中之部分、該連接孔6丨的内部、該互 連溝槽81的内部以及該内層絕緣薄膜8之上,以銅作為沈積 物質,沈積覆蓋一譬如,1.4微米厚之第二互連金屬層1〇。、 接著,如圖6B所示,以譬如,CMP法,將該金屬層1〇中 不處於該互連溝槽8丨及該連接孔6 !中之部分予以去除,同 時地形成第二互連l〇a及金屬塞10b(雙重金屬鑲嵌法)。 裝 訂 線 72330-950926.DOC -13-
1276184 A7 - ——一 B7 五、發明説明(10 ) 接著,如圖7A所示,以譬如,CVD法,於該第二互連1〇a 及忒障壁薄膜9 a及該内層絕緣薄膜8所暴露部分之整個表面 上,沈積覆盍氮化矽,形成絕緣薄膜丨丨。塗佈一層光阻, 形成一阻膜1 2。 接著,如圖7 B所示,以譬如,微影技術,於該阻膜丨2中 形成一用以形成電極(凸塊)之開口 12卜 接著,如圖8所示,以譬如CVD法,於該内層絕緣薄膜i j 芡開口 111的内部、阻膜丨2之開口 i 2 j的内部以及阻膜丨2之 上的整個表面上,覆蓋沈積一氮化鈇用以防止銅擴散至該 内層絕緣薄膜及用以增強接合度,作為障壁薄膜層1 3,以 及一以銅充作電極主要物質之主電極層14。 接著,如圖9A所示,以譬如,CMP法,將障壁薄膜層13 及主電極層14中不處於開口 121及hi中之部分予以去除, 形成障壁薄膜13a及主電極14a。 接著,如圖9 B所示,去除阻膜i 2,形成一有一部份突出 於該絕緣薄膜11,由該障壁薄膜13a及該主電極14a所組成 之電極。
Ik後的步驟則是’於該電極(13a,14a)的表面上形成一由 譬如,鎳/銘所組成,用以防止銅或其他金屬發生氧化之 保濩薄膜1 5,最後,形成如圖1所示之半導體裝置樣,電極 包含了該主電極14a,該障壁薄膜13a以及該保護薄膜1 5。 根據上述本發明之用以製造配備電極之半導體裝置之方 法’運用積體電路晶片内層互連製程中所使用之金屬鑲嵌 法,即可輕易地形成譬如,銅製之電極。 72330-950926.DOC - 14 - 本紙張尺度適用中國國家標準(CNS) A4規格(210X297公釐)
1276184
於疋丨於此方法乃屬於製造晶圓時所使用的方法,所 以晶圓製程中所使用的互連規則及設計規則都是可以應用 的’因此可輕易地在晶片的表面上形成超過幽個的微凸 塊,且可輕易地形成尺寸精密度高的小電極。 、本發明之用以製造半導體裝置及電極之方法,不以上述 之具,實施例為限。舉個例子,本具體實施例乃使用銅作 為該等互連之材質,其實,使用譬如,鋁作為互連材質也 是可以的。 此處,若使用鋁作為該等互連之材質時,則本具體實施 例中用以阻正銅擴散之障壁薄膜或氮化矽薄膜就沒有存在 的必要。 此外,雖然本具體實施例使用了兩個互連層,但本發明 也是可以使用多個互連層的。 另外,雖然本具體實施例所使用之方法乃用於製造具有 金氧半電晶體之半導體裝置,但其實本發明是可以應用在 其他任何的半導體裝置像是,雙載子半導體裝置,雙載子 互補式金氧半(BiCMOS)半導體裝置以及化合物半導體裝置 上的。 除了上述的具體實施例之外,只要在不偏離發明之基本 觀念及範圍下,本發明可做各式修改。 概述本發明之結果:根據本具體實施例之用以製造半導 體裝置及電極之方法,可製造出尺寸精密度高之小電極。 圖式元件符號說明 1 矽基板 2 内層絕緣薄膜 -15- 裝
72330-950926.DOC 本紙張尺度適用中國國家標準(CNS) A4規格(210X 297公釐) 1276184 12 A7 B7 五、發明説明( ) 3 障壁薄膜層 8 1 互連溝槽 3a 障壁薄膜 111 開口 4 第一互連層 121 開口 4 a 第一互連層 5 氮化矽薄膜 6 内層絕緣薄膜 7 氮化矽薄膜 8 内層絕緣薄膜 9 障壁薄膜層 9a 障壁薄1莫 9b 障壁薄膜 10 金屬層 10a 第二互連層 10b 金屬塞 11 絕緣薄膜 1 2 阻膜 13 障壁薄膜層 13a 障壁薄膜 14 主電極層 14a 主電極 15 保護薄膜 16 電極 2 1 互連溝槽 6 1 連接孔 72330-950926.DOC -16- 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐)
Claims (1)
1276184 Ss8 C8 D8 六、申請專利範園 1 . 一種用以製造用於一半導體晶片之電極之方法,該半導 體晶片具有複數個預先形成之固定至一矽基板之半導體 積體電路元件,該方法包含下列步驟: 於該複數個半導體積體電路元件之一半導體積體電路 元件之一互連圖案上形成一絕緣薄膜; 在該絕緣薄膜上形成在該複數個半導體積體電路元件 之該半導體積體電路元件之該等電極設置之位置具有開 口之一阻膜; 使用該阻膜作為一遮罩以將該等開口内之絕緣薄膜予 以去除以曝露一部分的該互連圖案; 於該曝露的互連圖案以及該阻膜之上形成一導體 層; 去除形成於該阻膜之上的導體層而留下形成於該曝露 的互連圖案上之導體層;以及 去除該遮罩層及進一步其中形成於該曝露的互連圖案 上的該導體層形成一至該複數個半導體積體電路元件之 另一半導體積體電路元件之電連接,至該另一半導體積 體電路元件之電連接亦藉由圖案化當該另一半導體積體 電路元件固定至該矽基板時形成於該另一半導體積體電 路元件上之絕緣體而形成。 2.如申請專利範圍第1項之製造用於一半導體晶片之電極 之方法,尚包含:在將部分的互連圖案予以曝露之後但 該導體層形成之前於該曝露的互連圖案及該阻膜之上形 成一障壁薄膜之步騾,其中 72330-950926.DOC 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐) 裝 玎 線 1276184 έ88 C8 D8 六、申請專利範圍 形成該導體層之步騾包含於該障壁薄膜上形成該導體 層之步騾,及 去除該導體層之步驟包含去除形成於該阻膜上之障壁 薄膜及導體層而留下形成於該曝露的互連圖案上之障壁 薄膜及導體層之步驟。 3 ·如申請專利範圍第2項之製造用於一半導體晶片之電極 接觸之方法’其中形成該導體層之步驟包含以銅形成該 導體層之步騾。 ^ 4 ·如申請專利範圍第1項之製造用於一半導體晶片之電極 接觸之方法’尚包含:在去除該阻膜之後於該導體層之 上形成一絕緣薄膜之步驟。 5 · —種用以製造用於一半導體晶片之電極之方法,該半導 體晶片具有複數個預先形成之固定至一基板之半導體積 體電路元件,該方法包含下列步驟: 形成一内層絕緣薄膜以覆蓋該複數個半導體積體電路 元件之一半導體積體電路元件; 在複數個電接觸之每一個上之該内層絕緣薄膜中形成 一連接孔,以一導體層填充該等連接孔; 在該等填充之連接孔上形成一絕緣薄膜; 為在該絕緣薄膜中在該等電極接觸形成的位置形成多 個開口之目的而形成一阻膜; 藉由使用該阻膜作為一遮罩以選擇性地去除該絕緣薄 膜以形成該等開口; 藉由在該等開口及該阻膜上施加一導體層以使用一導 -2 - 72330-950926.DOC 本紙張尺度適用中國國家標準(CNS) A4規格(210X297公酱) 1276184 έ88 C8 D8 六、申請專利範圍 體填充該等開口以形成該等電接觸,以及 進一步其中該導體填充一開口形成一電連接至該複數 個半導體積體電路元件之另一半導體積體電路元件,至 該另一半導體積體電路元件之電連接亦藉由圖案化當該 另一半導體積體電路元件固定至該矽基板時形成於該另 一半導體積體電路元件上之絕緣體而形成。 6. 如申請專利範圍第5項之製造用於一半導體晶片之電極 之方法,其中 形成一絕緣薄膜之步驟包含在一最上方互連圖案上形 成一絕緣薄膜之步騾,以及 選擇性地去除該絕緣薄膜之步驟包含曝露部分之該最 上方互連圖案之步驟。 7. 如申請專利範圍第5項之製造用於一半導體晶片之電極 之方法,尚包含:在填充該導體層之前於該曝露之互連 圖案上形成一障壁薄膜之步驟,以及其中 去除該導體層之步驟包含去除形成於遮罩層上之障壁 薄膜及導體層而留下形成於曝露的互連圖案上之障壁薄 膜及導體層之步驟。 8. 如申請專利範圍第7項之製造用於一半導體晶片之電極 之方法,其中形成該導體層之步驟包含以銅形成該導體 層之步驟。 9. 如申請專利範圍第5項之製造用於一半導體晶片之電極 之方法,包含:在去除該阻膜之後於該導體層之上形成 一絕緣薄膜之步騾。 72330-950926.DOC 本纸張尺度適用中國國家標準(CNS) A4規格(210X297公釐)
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FI119714B (fi) | 2005-06-16 | 2009-02-13 | Imbera Electronics Oy | Piirilevyrakenne ja menetelmä piirilevyrakenteen valmistamiseksi |
KR100625170B1 (ko) * | 2005-07-13 | 2006-09-15 | 삼성전자주식회사 | 전극 구조체, 이의 제조 방법, 이를 포함하는 상변화메모리 장치 및 그 제조 방법 |
DE102007004860B4 (de) * | 2007-01-31 | 2008-11-06 | Advanced Micro Devices, Inc., Sunnyvale | Verfahren zur Herstellung einer Kupfer-basierten Metallisierungsschicht mit einer leitenden Deckschicht durch ein verbessertes Integrationsschema |
WO2013095433A1 (en) * | 2011-12-21 | 2013-06-27 | Intel Corporation | Electroless filled conductive structures |
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EP2704536B1 (en) * | 2012-08-31 | 2015-12-16 | Harman Becker Automotive Systems GmbH | Method for producing a circuit board system |
US9034752B2 (en) * | 2013-01-03 | 2015-05-19 | Micron Technology, Inc. | Methods of exposing conductive vias of semiconductor devices and associated structures |
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US10510657B2 (en) | 2017-09-26 | 2019-12-17 | Taiwan Semiconductor Manufacturing Co., Ltd. | Semiconductor device with interconnecting structure and method for manufacturing the same |
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US4961822A (en) * | 1989-04-17 | 1990-10-09 | Liao Kuan Y | Fully recessed interconnection scheme with titanium-tungsten and selective CVD tungsten |
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US6054378A (en) * | 1998-06-25 | 2000-04-25 | Vlsi Technology, Inc. | Method for encapsulating a metal via in damascene |
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