TW200529358A - Device and methodology for reducing effective dielectric constant in semiconductor device - Google Patents
Device and methodology for reducing effective dielectric constant in semiconductor device Download PDFInfo
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- TW200529358A TW200529358A TW094101987A TW94101987A TW200529358A TW 200529358 A TW200529358 A TW 200529358A TW 094101987 A TW094101987 A TW 094101987A TW 94101987 A TW94101987 A TW 94101987A TW 200529358 A TW200529358 A TW 200529358A
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- 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
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
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- H01L21/3105—After-treatment
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Description
200529358 九、發明說明: 【發明所屬之技術領域】 是關種Λ導财置及·造方法,尤其 $於,+,裝置及介電材料中次微影特徵之製造 方法,供降低此介電材料之有效介電常數。 【先前技術】 為了製造如積體電路(ic)之微電子裝置,需 金屬層及絕緣層選擇性地沉積於梦要:ς 能是如二氧化石夕、氮氧化石夕,匕石夕玻璃(FSG) Ϊ 者二如内層介電層(ILD),沉積於金 ^層以及作為金屬之電氣絕緣或具有其他習知功 月b。14些層以習知技術,如加強式化學氣相沉 (PECVD)、化學氣相沉積(CVD)或其他製程沉積。、 藉由蝕刻金屬層間之絕緣層形成介層窗(%郎),併將之 連接分別位於介電(絕緣) 曰 為達成此目的,至屬及絕緣之堆疊層經過微影势 程,以提供具有預定1C設計之圖案阻抗。舉例來說,^ 結構之頂層可能覆蓋光活性複合材料之光阻層,以藉由 罩而圖案化。之後,微影製程使用可見光或紫外線^過遮 罩至光阻層,以將之曝光於遮罩圖案。可能在晶圓基材之 頂部使用一抗反光塗層(ARC),使至光阻抗層之光反射最 小,,提供一致的處理程序。執行的蝕刻可能為非等向性 ,等向性及濕或乾蝕刻,將視材料之物理及化學特性而 疋。若不管製造程序,為了使超大積體電路中之装置組件 之集積度最大化,則必須增加組件之密度。
理慈 4旧M/04147TW 200529358 雖然一氧化梦因其熱穩定及機械強度,已被使用為絕 緣材料,然而最近幾年發現有一種低介電常數(l〇W-k)材料 可達到更好的裝置效能。藉由使用一低介電常數材料,可 使結構之電容降低,增加裝置速度。然而,相較於典型之 介電材料(如二氧化矽),使用有機低介電常數材料(如 SiLK,由 Dow Chemical Co·,Midland,Ml 製造)傾向具有 較低機械強度。在某些應用中,發現與在裝置中其他材料 組合之下列之材料具有一特定有效介電常數,舉例來說·· (1)未摻雜的矽玻璃(USG),具有K為4·1及Keff約《3 ; ⑼USG及氟化石夕玻璃(FSG)(K為3.6)之雙層,具有Keff 約3·8;(iii)有機矽玻璃(0SG),具有κ為2·9及Keff約3.0, 以及(iv)多孔OSG,具有多孔〇sg及〇SG之雙層,Keff 約 2·4 〇 藉由建立具有l〇W-k介電或混合low-k介電堆疊之裝 置,線路電容耦合之大的内層線至線組件將會減少,因^ 將lo:k材料之正向優點最大化,同時增進最終結構之整 個堅貫及可#度。相較於”全部1〇w_k,,介電材料堆疊,混 合的氧化物/low-k介電堆疊結構較為堅實,且由於有機及 半有機low-k材料之高CTE(熱膨脹係數)產生之熱循環應 力’、已知此合的氧化物/l〇W-k介電堆疊結構對於介層窗阻 值劣化及介層窗分層相對地更為敏感H在低介電 數,介電材料的整體強度明顯降低。
理慈 4 旧 M/04147TW 即使具f低介電常數材料,如混合氧化物/低介電堆疊 、,構,仍可藉由㈣連線及介層糊之介紐射空 心(^ded)通道,降地多層結構之有效哪两或介電材料 之K,以進-纽善裝置之電子·。這些通道以直空 介料數麟丨。齡她t道,可使用較高 8 200529358 二“數材料,增加結構之整體缝,而不會降低電子特 已t的,統中’可使用次解析度微影製程以建立此 中,也需要在費。在次解析度郷製程 容’軸這魏道建域的線-線電 置的整個電St;生存在,氣的二層電容;當然,這會影響裝 這騎成電鍍槽及金«人i些ϊ ^ 連線之底部,使其無支擇或浮 動因此降低裝置之整體結構及電子效能。 本發明意欲解決這些及其他問題。 【發明内容】 -絕造:種結構之方法,包含提供具有 靜成一次微影模板遮罩於絕緣層上,絕 =='嶋,峨輸 Γ'4 本
理慈 4 旧 IW04147TW ,遮罩選擇性_阻礙結構及絕緣二於== 200529358 成次微影特徵。 在本發明之另一方面,一種半導體裝置包含一 緣^具有至少—縫_成於其中且 於内 連線之一最小間隙。 【實施方式】 Γ祕關於—種半導體裝置及製造方法,提供在介電 ί ίϋ料之通道(或孔洞),以改善整體裝置效能,本發明 材料製程步驟或機台設定’亦不需要引用新的 2 '最、的建構中’且進—步避免次解析度微影製程中 之缺點。 再者’本發明之方法易於與任一材料一同使用,益办 是混合,構或具有高介電常數之材料。本發明-方面^ 内連線洋動’ i降财效介電常數Keff,以轉内連線之 層-層垂直電容。使用本發明之方法也可能維持整體裝置強 圖1揭示一般用於製造一半導體裝置之結構,此仕 構’標示為元件符號100,為一單階(level)結構,即声口 (wiring layer),用於說明本發明之目的。然而,習知技^ 人士所共知的是,在此揭露或所述之結構可能是具夕 T =之多階結構。在此所述之製造方法亦適於;苗述二 圖1之結構100包含一基材110,可為任何適 知材料(如矽)。此基材可能是建立為線階之一積體 =
理慈 4 旧 M/04147TW 絕緣層120使用任何習知方法,如電漿加強式化風=^ ±\^Λ/ηΑΛΑ7Ύ\Μ 予现目〉) 200529358 積(PECVD)、化學氣相沉積(CVD)或其他製程,而沉積於 基材110上。絕緣層120可能為(i)未摻雜的矽玻璃(USG), (u)USG及氟化矽玻璃(fsg),(iii)有機矽玻璃(〇sg),(iv) 多孔OSG及OSG,(v)包含這些材料的組合物或其他習知 介電材料。絕緣層120,在某一實施例中,較佳為〇S(}或 OSG及多孔-OSG之層結構。擴散阻障層135,可能為sic、 SiN或其他在此述及之已知材料,可能沉積於絕緣層12〇 上’以保護内連線130。擴散絕緣層丨35可能額外作為之 後製知之餘刻遮罩。擴散阻障層〗35可能具有範圍介 埃至500埃之厚度,或其他厚度,視其細而定。、 圖2揭示本發明之方法之第—步驟。在此步驟令,一 匕阻抗14〇(上微影阻抗)係沉積或形成 於擴政阻&層135上。阻礙圖案化阻抗140在-實施例中 $J 2000>埃至1微米之厚*,且以習知手段沉積。阻礙 圖案化阻抗可能是任一習知光阻材料。阻礙圖案化阻抗 1 二包含大於最娜析度特徵之孔洞或特徵,也就是在一 貫把例中,阻礙圖案化阻抗14〇大於内連線13〇間之間隙。 圖3揭示本發明之第二步驟。在圖3中, J米模板_汰―啊nan〇t l j^ 部分擴散阻障層135上。塊狀 t例中,塊狀絲物奈賴板⑼之特徵 之間隙。塊狀共聚物奈米模板150之材 緣共聚物奈米模板150可能是自 :了早層她化夕孔或可滲透之細。塊狀共聚物 _f_5=能以電子束、料線或以熱·。可進確^
11 ,A 200529358 的是在一實施例中,阻礙圖案化阻抗140可能形成於塊狀 共聚物奈米模板150上。
广在一實施例中,塊狀共聚物奈米模板15〇之孔洞之直 徑約為20nm,孔洞間之間距約為2〇nm。在其他實施例中, 特徵及間距之範®可能從小於5nm至lGGnm。塊狀共聚物 奈米模板150之厚度在一實施例中約為2〇nm,且由具有 篩孔(mesh)或孔洞之有機材料基質所組成。可以了解^是 塊狀共聚物奈米模板15〇(及阻礙阻抗)之厚度將視絕緣層 之厚度、所需賴徵解減及其侧素而定,這些全^ 由習知技藝者參考在此之說明而確定。 “圖4揭示本發明之一蝕刻步驟。現在塊狀共聚物奈米 模板150及雙塊狀(diblock)圖案化阻抗ι4〇形成於基材 上在實施例中,係使用RIE之钱刻,以在内連線Go 間形成通道160或奈米管柱。在此步驟中,當在塊狀共聚 物奈米模板150之孔洞間蝕刻絕緣體12〇,可能故意侵蝕 絕緣層120,以在鄰近的内連線間形成一或多夺米g柱。 在其他實施例中,可能侵蝕絕緣層12〇至基材或更低層 階。在此步驟中,因為無法無限地選擇一姓刻步驟,塊& 共聚物奈米模板150也可能開始被腐姓,然而,塊狀共聚 物奈米模板150的特徵已被轉移至擴散阻障層135,^ ,將作為具有轉移圖案之遮罩。也可能^成一底、切 (undercut)於内連線下方。 如圖4所示’小孔洞135a約與通道16〇相 =絕緣材料m之絲,基本上是蝴應於塊狀共聚物寺 米权板150之特徵大小’舉例來說,小孔洞135 約在20埃到200埃之級數。再者, 聰4IBM/04147TW 4功间 J月匕从 12 200529358 内連線130之侧壁蝕刻絕緣材料12〇a,但在之後以進一步 的沉積步驟再次沉積。在一實施例中,侧壁姓刻絕緣材料 12(b之厚度範圍介於5埃至2〇〇埃,在接近塊狀共聚物奈 米模板150或擴散阻障層135處具有較厚的側壁。可為習 知技藝者所了解的是為了控制圖案,遮罩13〇、15〇及蝕 刻步驟可能被,因此齡了接近介層触地㈣㈣ 之,隙及其相似者的可能。同樣地,藉由調整银刻製程, 通道160可能部份或完全延伸而穿過絕緣層120,或接近 ^連線之絕緣層可能完全或實質上完全被舰。在後者的 情況下,在形成一較高内連線層之後續步驟時,可能在接 近側壁處沉積絕緣材料。 雜料向性侧,主要垂直往下_,以侧絕 ,物而形成通道16〇。可能在後執行濕式潔淨(wet 步驟產生的任何聚合物殘留物移除。此 含—侧劑’持續非等向性侧絕緣層, 方之底切(圖5)。若使用稀釋的氨氣酸 i例3W或FSG的絕緣層,其速度相對較慢。 ί每分鐘_i02QHi比例為200:15時之侧速率可能
列、岽使用DHF_0SG時具有非常低化學姓 雷* π、'/1法^得。在QSG的實施例中,使用RIE 面二ί供或:破壞,’(damage)暴露的0sg表 魏i ΐίίΐ 而’ #使用賴〇2,可能破壞0SG 侧^修!^然此购可藉由提供對破壞部分的其他
理慈 4 旧 M/04147TW 13 200529358 圖5呈現除了提供一底切於形成的通道外,以 蝕刻擴大奈米管柱至一單一較大管柱16〇a,單一較大管柱 160a大於塊狀共聚物奈米模板1兄之原始空洞。在此步 J,藉由加入如〇2以改變應。在此步驟,#向性侧形 :底切160b,但應不會钱刻内連線底部之全部區域。再 人可以凋整韻刻以提供更極端(extreme)的底切,這將視 =期待的整體裝置之效能而定。然而,此底城佳不會包
線130底部之全部區域。在一實施例,此底切將降 低兄線之垂直電容。 二圖6呈現本發日月之其他製造步驟,舉例來說,在底切 二、之後,將塊狀共聚物奈米模板15〇及阻礙階圖案化阻 抗140侧或剝離,並留下小孔洞⑽。這些遮罩^能在 經部份或完全被舰,因此留下紐阻播層 、為遮罩。濕姓刻製程也可與溶劑DHp或其他可將前 述f刻任何介電材料之酸一併使用。在一實施例中,DHF j濃度約,刪:1至: 1之_ : HF。在本發明之另 使ft藉寬通道16。’之後將具有獨介電常數及 ’、 貝如咼延展性、高破裂動性(fracture toughness)等 之材料回填於通道中。 仍然參考圖6,之後以—般沉積方法,如PECVD沉 ^二,緣層170於形成的結構上。此第二絕緣層可能包 LHcap) ’在沉積一些於内連線13〇(如銅線)及擴散 上之後’此罩蓋將除了密封通道外,並形成縮 ,區域5。在—實施例中,此罩蓋將侧貌(topography) ί小些縮減可能使介於鄰近層之間任何階至階之電 曰 1 _ , * I ^ Mi
理慈 4IBM/04147TW 200529358 所、、在絕緣材料之初始沉積期間,小尺寸的孔洞135a實 質消除沉,於管柱、足夠厚的材料的需求。第二絕緣層17〇 之材料可能為(i)未摻雜的矽玻璃(USG),(ii)USG及氟化矽 玻璃(FSG) ’ (111)有機矽玻璃(OSG),(iv)多孔OSG及OSG, (v)包含>這些材料的組合物或其他習知介電材料。在一實施 例中,第二絕緣層17〇較佳為〇SG或多孔〇SG及〇sg 之層結構,此層結構以0scwt為密封管柱之罩蓋。
固殉不根據本發明所形成之結構之上視圖。在此圖 :’阻礙阻抗圖案175可能使用阻礙目案化阻抗140而形 阻礙阻抗圖案175可能用於額外強化形成於通道外的 ,、他位置之結構。在某一範例的方法中,阻礙阻抗圖案】乃 可能形成於切割道(scribe line)或介層、洞上,以提供額外強 度及預防在錯截操作(Sawing 〇perati〇n)附近區域 ,認知的是在_道上的通道可能_碎=料二 3予巧失效,在同時發生極端的挖切時,阻礙阻抗 能使介電質強化,且避免或預防在鄰近介層
可以了解的是如前所述,本發明之步驟及裝 更面階絕緣層重複著。因此,如圖7所示,可能 = 明之方法形成具有介層洞、内連線及通 X ,以被了解的是藉由提供通道, 數可以降低,而不會顯著影響整個裝置的完整性、 =。^實上,藉由具有2.77或更大的Keff,本發明之方 二H到2.G或更小的Keff。再者,藉由使用本發μ 方法,可以避免於絕緣層中使用多孔材料,因此, ^ 置之機械強度及熱性能,即可使熱往下傳 Θ、+, 結構可藉由其他描述於此的方法所形成。、土 廷^
理慈 4IBM/04147TW 200529358 ® =至14揭示本發明之另一個實施例。圖9為一結 構之示意圖,此結構具有前述任一種類之兩絕緣層200、 210。舉例來說,此絕緣層可以是Si02、FSG、SiCOH、 SlLK或其他材料。絕緣層200包含一内連線220,且絕緣 層包含一介層洞230及數個内連線240。一介電罩蓋,如 SiN、SiC、SiCOH等(擴散層)252沉積於絕緣層210及内 士,上二在一實施例中,罩蓋之厚度範圍從5奈米至50 =米1若内連線,如銅線,被罩蓋住,則提供Si〇2作為罩 蓋。這些材料或任一組合物之多層可能與本發明一同使 現在參考圖10至14,在厚度介於5奈米至5〇奈米之 Au、Ag、In、Sn或Ga沉積層之後,別〇2之毯覆沉積層 260提供於罩蓋250上。可以了解的是,阻礙圖案化阻抗 可能沉積於沉積層260及270之間,或也可在沉積層27〇 亡。在前述之實施财,阻礙_她抗應為—上微影遮 罩’供丽在裝置中形成大範圍的縫隙。可以輕易溶解於 酸、酸的麵級液巾,如Sn或In可驗驗本發明中、, 以更容易於後續步驟移除。然而,其他金屬也可以一起使 用於本發明中。如以回火處理層27〇,產生聚結 (agglomeration)(即串珠),以形成介於lnm至5〇nm之次 微影特徵。在此手段中,奈米島(island)27〇a從層27〇形 作為進-步製程步驟之遮罩。層27〇具有介於^至如聰 之厚度且在-實施射,具有介於5nm至施m之厚度。 在圖11,在層15〇中之細孔被飿刻。此姓刻之執行一 般可藉由RIE。奈米島270a由濕或餘刻剝離,且以迎 ,刻持續至層250。-下層硬遮罩,如罩蓋25Q,在移 理慈之齡麟賴下騎構。励_形成钱 200529358 道或細孔250a(圖12)。蝕刻持續至二氧化矽層21〇,形成 細孔或奈米通道210a’實質與層270之次微影特徵具有相 同尺寸,介於Inm至50nm。在一實施例中,rje為非等 向性姓刻。 沉積於絕緣層210上之介電罩蓋層28〇,乃以pECVD 或任一習知方法沉積二氧化矽,供密封通道25〇a(圖14)。 在本發明之一方面,此介電罩蓋層280可能具有範圍介於 5nm至50nm之厚度(當然可用於此的材料之其他厚度也要 考慮進去)。此介電罩蓋280可同樣可為其他材料,如Sic、 SiCOH或SiN。在某一實施例中,此奈米通道可以在被罩 蓋介電層密封前,以堅固介電材f所填充。縮減部分可能 形成於罩蓋介電層280中。 此實施例之一方面,在阻抗中無規則的孔洞圖案可能 使用電子束、X光或EUV微影而形成。在此例中,此阻 抗將留下介電層的區域遮罩,且垂直細孔或管柱被姓刻至 介電層中。當介電質為有機材料,如矽化物之遮罩可能用 於阻抗下方。 在進步的實施例中’具有造孔劑^porogen)之二維 聚合物遮罩中的無規則孔洞圖案,可能用於形成細孔。為 了製造此遮罩,使用聚合物,且之後以高溫硬化或以溶 知丨或=4知技術移除造孔劑。如此形成次微影孔洞以供 進一f製程,將不需要用於此或其他製程之光學微影曝 光。k些垂直細孔或奈米管柱之後將以上述之手段蝕刻。 …具有如金屬溶膠(sol)之細微金屬顆粒之旋塗薄膜也可 能使用於形成所需的孔洞,以於層27〇代表。在此製程中, 理慈 4IBM/04147TW 土丁 17 9 200529358 ,自溶膠的細微金屬顆粒之單層可能藉由界面活性劑預 層260而沉積,界面活性劑在表面形成單層,且吸引 顆粒至表面’使形成轉職之單層。也就是說,此 ^將^燒掉,訂金制粒於表面,其之後將可作為遮 Lr刀離旋佈溶液,如塊狀共聚物,也可用作為遮罩。 選擇性的遮罩可以用於選擇二 〜加曰日片關鍵區域之堅固性’如參相7所討論的部分。 雖然本發明已如前實施例所討論 =離本發明之精神及範圍下,將可了 【圖式簡單說明】 圖1使用於本發明之初始結構之示意 圖2為根據本發明之製程步驟之示音^ 圖3為根據本發明之製程步驟之示音圖 圖4為根據本發明之製程步驟之“二. 圖5為根據本發明之製程步驟之二图, 圖6為根據本發明(及形成的二秦f ’ 圖7為根據本發明所形成的結步驟之示意圖; 圖8為根據本發明逖形成的多 , 圖9為根據本發明之製程步驟之一側剖面圖; 圖10為根據本發明之製程步驟^*立® ; 圖11為根據本發明之製程步=圖; 圖12 圖13 圖14 為根據本發明之製程步=圖 為根據本發明之製程;:以, 驟之示意圖 為根據本發明(及形成的結構^程步
理慈 4 旧M/04147TW 18 200529358 【主要元件符號說明】 100結構 120、200、210 絕緣層 135擴散阻障層 150塊狀共聚物奈米模板 135a小孔洞 160b底切 230介層洞 260、270沉積層 250a細孔 110基材 130、220、240 内連線 140、175阻礙圖案化阻抗 160通道 160a較大管柱 170第二絕緣層 252、280介電罩蓋層 270a奈米島
理慈 4旧M/04147TW 19
Claims (1)
- 200529358 十、申請專利範圍: 1·-气製造-結構之方法,包含下列步驟: 内連Ϊ供一結構,該結構具有一絕緣層,該絕緣層具有至少一 巧成一次微影模板遮罩於該絕緣層上; 越 ^該次微影模板遮罩,選擇性#刻該絕緣層,以形成跨 Μ > —内連線之一側壁的次微影特徵。2·如印求項1所述之方法 之實質垂直管柱。 ’其中該次微影特徵為在該絕緣層中 之方法’其巾該次郷特徵進—步包含複數 且且有次微影模板鮮下之—罩蓋㈣Ping)層中, 二 直仅或截面(Cr〇SSsecti〇n)小於該至少一内連線之一 徑或截φ,且也與該絕緣層巾之該實縣直管柱實質上相 等0 t如ΪΪ!1所述之方法,其中該侧步驟為一非等向性钱 刻,形成複數個次微影特徵並定義為奈米管柱。 5如請求項4所述之方法,其中該侧步驟包含—等向性银 刻,j結合(meld)至少鄰近之奈米管柱,並於該至少一内 之下&供一底切(undercut)。 6.如請求項1所述之方法,其中: 該次微影特徵為在該絕緣層中之實質垂直管柱;以及 该次微影特徵進一步包含複數個孔洞,具有一直 連ΐΐτ直徑,且與該絕緣層中之該實質垂:管柱°實 貝上相等,且该孔洞之一頂部是漸尖的。 理慈 4 旧 M/04147TW 20 200529358 1所述之方法,於該形成步驟前,ϋ-^人 層ΐ步驟’且縮減罩3沉積 成具有—次微影直獲之縮減結構。 曰之叫,以形 之步驟’ i形:iSi構進-步包含沉積'絕緣層於該頂部 至少法’料觀齡_彡舰緣材料於兮 刻:内連線之賴壁,在該侧步驟_該絕緣材虫該 10·如睛求項1所述之方法,苴嗲 _ck)共聚物奈米模板,形成於一擴散t塊狀 遮罩’該料具有娜絲細岭频板轉作為— 具有 11.如請求項10所述之方法,其巾該塊 小於鄰近内連線間之距離的特徵 4物不未椟板 12=請求項1()所述之方法,其_該塊狀共聚物 組合(self assembly)本身成實質均今开彡办厂棋板為自 的一材料。 錢只貝均勾形狀且隔開的孔洞或特徵 13.如請求項1〇所述之方法,其中該塊狀共聚 特徵150在小於5奈米至100奈米之一範圍。”、板之垓 磉 =如請求項m述之方法,其中該塊狀共聚物 ^列之-⑴部分覆蓋該絕緣層上之—阻礙 在該阻礙阻抗下,該阻礙阻抗包含大於鄰近内連 g) 理慈 4 旧 M/04147TW 21 200529358 15.如請求項14所述之方法’進—步包含在該絕緣層中之該次 微影特徵形成之後’移除該塊狀絲物奈雜板及醜阻抗之 舟属聚。 16·如請求項15所述之方法, 層覆蓋該絕緣層上。 進一步包含提供一罩蓋(capping) 17·如=求項1所述之方法,其巾該次微影模板遮罩為一 沉積層,該金屬沉積處理以產生聚結㈣_rati〇n)。 广,求項17所述之方法,其中該金屬沉積層為—包含权 Ag、In、Sn及Ga其中之—的材料。 ϋ月H! 之方法’其中該聚結係藉由回火以形成, 該U生耗圍在1奈米至50奈米之次微影特徵。 ’其中該回火產生奈米島(isiand), 以作為一姓刻步驟中之一遮罩。 求項17所述之方法,其中該金屬沉積層係沉積於一罩 22·如睛求項21所述之方法 SiOH其中之一材料所形成。 其中該罩蓋層係由SiN、SiC及 23.如請21所述之方法,進—步包含下列步驟: 芸芦猎二屬沉積層之該次微影模板遮罩,蝕刻該罩 二對ί ΐ金屬沉積射之該特徵而形成細孔(卿),· 移除該金屬沉積層;以及 理慈 4旧M/04147TW 22 200529358 以遠罩蓋層作為一遮罩,餘刻該絕緣層以形成該次微影特 24·如請求項23所述之方法,其中該次微影特徵為實質垂直之 細孔。 、、 25·如請求項24所述之方法,進一步包含將該至少一内連 之鄰近實質垂直細孔結合(meld)在一起。 、 進一步包含提供一密封罩蓋於該 其中该次微影特徵以一第二材料 27·如請求項23所述之方法, 次微影特徵之上的步驟。 28·如請求項1所述之方法, 而非該絕緣層回填。29.如請求項27所述之方法,^ ^ 沉的-材料,且具有範圍在5 或 —絕緣材包含將具有—不同特徵之 31·如請求項1所述之方法, 子束、X光或ECV微影,你=4t该次微影模組遮罩係使用電 成。 阻抗中之一無規則孔洞圖案所形 32·如晴求項1所述之方法, 理慈 4IBM/04147TW 其令該次微影模組遮罩使用一造 23 200529358 孔劑在二維聚合物遮罩中之一無規則孔洞圖案。 ^ μ含在該鄉她遮罩之 3寸5大之方法,針社微魏罩供防止在尺 寸大於一最小内連線間隙之至少一區域形成縫隙(gap)。 36.種製造一結構之方法,包含下列步驟: 内連Ϊ供—結構’ 構具有—絕緣層,該絕緣層具有複數個 形成一絕緣擴散阻障層於該絕緣層上: 形成一阻礙結構於該絕緣擴散阻障層上; 模板娜嶋散嶋上,該次微影 n遽板料,選擇性侧該絕緣擴散阻障層及 该絕緣層,以於該絕緣層中形成次微影特徵。 早曰及 綠’射魏錄獅狀該次微影 38·如請求項%所述之方法,其中該次微影特徵 :匕洞,該複數個孔洞具有一直徑小於每一該丄 t個 直徑,且小於形成於該絕緣層上之垂直管柱。 ’、 非等向 36所述之方法,其巾祕刻步驟包含· 24 200529358 一〗 等向性钱刻,以溶解該次微影特徵間之隔間,且提 供一展切於至少一該複數個内連線之下。 40. 求項36所述之方法,其中·· f影特徵為在該絕緣層中之實質垂直管柱; 洞,談玫進一步包含在該絕緣擴散層巾之複數個孔 實質垂直紐目等截面幼触絕騎中之該 ί罩方法’進—步包含:以—罩蓋層縮減 42·,$36所述之方法,其中: 聚物ΐίίϊϊίί遮罩具有—塊狀共聚物奈米難,該塊狀共 奈米至_奈米之特徵- 輯之綠’巾該錢賴錢罩為一金屬 声島屬崎層被處朗私躲,該雜產生夺米尺 度島’以作為該_步驟中之_遮罩。 不卞 4而述之方法’財該次微雜伽—第二材料 45^=所述之方法,進一步包含下列步驟: 縮減ΪΪ及到軍蓋於該絕緣層中之該次微影特徵上,以形成 /儿積一絕緣材料於該密封罩蓋層上。 理慈 4IBM/04147TW 200529358 46·如請求項36所述之方法,其中該次微影模板遮罩由下列之 一所形成①在阻抗中之一無規則的孔洞圖案,係使用電子束、 X光或EUV微影,(ii)使用造孔劑在二維聚合物遮罩中之一無 規則孔洞圖案。 47·如請求項36所述之方法,其中該蝕刻步驟將該絕緣材料 - 從該複數個内連線之側壁移除,且該絕緣材料之後重新沉積於 其上。 ® 48.如請求項36所述之方法,進一步包含沉積絕緣材料於該 次微影特徵之上,以形成縮減區域,以及提供絕緣材料於一些 該複數個内連線之該側壁上。 49·一種半導體結構,包含: 一絕緣層,具有至少一内連線特徵;以及 至夕縫隙形成於$亥絕緣層中’該縫隙跨越大於該内連線 ^ 間之一最小間隙。 V • 50.如請求項49所述之半導體結構,進一步包含複數個次微 影特徵,形成於該絕緣層之一頂部且與該至少一縫隙連通 (communicating),該複數個次微影特徵具有小於該至少一缝 隙之一直徑。 ' 體結構,其中該次微影結構為連通 52.如請求項51所述之半導體結構,進—步包含一密封層,形 成於遠纟巴緣層上,供縮減每一該至少一缝隙。 理慈 4旧M/04147TW 26 200529358 53.如明求項52所述之半導體結構,其中該縮 擴散阻障層之巾,該擴散轉·沉積闕_$形成於一 54·如明求項51所述之半導體結構,豆中該至少 近於該至少-内連線特徵之一4上的二緣,撕1隙包含鄰 =;以之=體,’其恤少-縫隙及該複 寻徵具有一截面,小於該至少一内連線之截面 =請求項49所述之半導體結構,其中在—切割道不存在該 該=长Μ 49所述'半導體結構,其$在接近介層洞不存在理慈 4 旧 M/04147TW27
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| TWI720058B (zh) * | 2015-12-16 | 2021-03-01 | 美商英特爾股份有限公司 | 用以提供有序的多孔性之方法及設備 |
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| US7405147B2 (en) | 2008-07-29 |
| US20080254630A1 (en) | 2008-10-16 |
| US20110111590A1 (en) | 2011-05-12 |
| CN1649107A (zh) | 2005-08-03 |
| US7592685B2 (en) | 2009-09-22 |
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| US7892940B2 (en) | 2011-02-22 |
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| US8343868B2 (en) | 2013-01-01 |
| US20050167838A1 (en) | 2005-08-04 |
| JP4378297B2 (ja) | 2009-12-02 |
| CN100428422C (zh) | 2008-10-22 |
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