TWI310223B - Low-pressure removal of photoresist and etch residue - Google Patents
Low-pressure removal of photoresist and etch residue Download PDFInfo
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- TWI310223B TWI310223B TW095101020A TW95101020A TWI310223B TW I310223 B TWI310223 B TW I310223B TW 095101020 A TW095101020 A TW 095101020A TW 95101020 A TW95101020 A TW 95101020A TW I310223 B TWI310223 B TW I310223B
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- 229920002120 photoresistant polymer Polymers 0.000 title claims description 12
- 238000004380 ashing Methods 0.000 claims description 100
- 238000000034 method Methods 0.000 claims description 91
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- 239000001257 hydrogen Substances 0.000 claims 2
- 229910052739 hydrogen Inorganic materials 0.000 claims 2
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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
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
-
- 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
- H01L21/02041—Cleaning
- H01L21/02057—Cleaning during device manufacture
- H01L21/0206—Cleaning during device manufacture during, before or after processing of insulating layers
- H01L21/02063—Cleaning during device manufacture during, before or after processing of insulating layers the processing being the formation of vias or contact holes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
- H01J37/32082—Radio frequency generated discharge
-
- 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
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3105—After-treatment
- H01L21/311—Etching the insulating layers by chemical or physical means
- H01L21/31127—Etching organic layers
- H01L21/31133—Etching organic layers by chemical means
- H01L21/31138—Etching organic layers by chemical means by dry-etching
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/42—Stripping or agents therefor
- G03F7/427—Stripping or agents therefor using plasma means only
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2237/00—Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging
- H01J2237/32—Processing objects by plasma generation
- H01J2237/33—Processing objects by plasma generation characterised by the type of processing
- H01J2237/334—Etching
- H01J2237/3342—Resist stripping
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L22/00—Testing or measuring during manufacture or treatment; Reliability measurements, i.e. testing of parts without further processing to modify the parts as such; Structural arrangements therefor
- H01L22/20—Sequence of activities consisting of a plurality of measurements, corrections, marking or sorting steps
- H01L22/26—Acting in response to an ongoing measurement without interruption of processing, e.g. endpoint detection, in-situ thickness measurement
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- Engineering & Computer Science (AREA)
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- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Plasma & Fusion (AREA)
- Analytical Chemistry (AREA)
- Drying Of Semiconductors (AREA)
- Exposure Of Semiconductors, Excluding Electron Or Ion Beam Exposure (AREA)
Description
1310223 九、發明說明: 【相關申請案之交叉參照】 本說明2::案第 關於此申請案之全部内容將併於 =月名稱為「光阻及_殘留物之低壓移除方 ⑻案年 之王口卩内各將併於本說明書中參照。 °月案 【發明所屬之技術領域】 製程===:的半導體微製造一 【先前技術】 梦署統係使用於半導體、積體電路、顯示器以及並他 與處理中’以在如半導體基板之基板上去料才 ϊΐΞΓ ϊϊίΐ板上。將積體電路之圖案自光微影遮軍= 板之電漿製程已成為產業界巾之鮮方法。 干等縣 1月fif ίίΐ裡,凡在侧各種不同型態的薄膜處,整合挑 Hi仍&存在。習知上係使介電層經圖案化而具有開口,以 >儿積v電材料而形成縱向接點。在圖案化 穴或硬式遮罩層係沉積於介電層上,曝露至 =士= 顯影。接著使該層狀構造在其中„化光_ 之開口處之電漿環境中進行蝕刻。 、中 於侧步驟後,在已_特徵部及腔絲面 ,留以及侧殘留物(例如聚合物碎片)。電漿清理的巧 曰挑婦稱為原處灰化㈣tu ashingM成功地去除光阻殘留= 1310223 及侧殘留物卻又能避免顯顯的錢。已知祕 灰化製程’其中施加於基板的偏壓在整個灰化製程中係維 ======物,其侧於處理室的内 圖1顯示單-步驟灰化製程之示範性橫剖關。以 構100移除光阻⑽㈣知單一步驟灰化製 ^ : __為織魏職寧=), 裘下為之^電層104及罩蓋層102(如SiN ,Sic),導致介電声切 =08和罩蓋層損耗110,有時甚至洞穿罩蓋層1〇2並侵宝下‘導 電層(如銅層,未顯示)。由於氣碳聚合物在#近腔室壁的^度¥ 晶圓邊緣處極為顯著。或者,結構100也可包含氟碳聚 在習知單-步驟灰化製程期間,光阻可在含氮電裝中 避ΐΐΐ匕後殘餘物的形成’故將某一偏壓功率施加於基板支 座上。在此f程躺,來自先前介電侧之處理錢上 合^沈積亦經過侧’且在電漿帽放域自由基。當偏壓施加
座ΐ+ΐ些氟自由基會侵錄於下層的介電薄膜並且損 耗罩盍層。#由降低偏壓或者施加零偏壓,能賊少介電薄 蝕以及罩蓋層損耗,但仍然觀察得到灰化後殘餘物。 、X 一種會造成如上述處理室問題的習知單一步驟灰化 包含以下的電漿製程條件:處理室壓力=50mT〇rr =150W,氧氣流速=2〇〇sccm。 ㈣偏壓 _在半導體製造中,習知單-步驟灰化製程經常在處理 行’而處理室的内腔室表面(以及待灰化的基板何包含來自 電質侧製㈣絲合物沈積。或者,該單—步驟灰 可在已清理來自先前蝕刻製程之聚合物沉積的處理室中實行。壬 1310223 【發明内容】 本發明之—目的為提供一種電漿處理方法,用 法侵r聚處理方法相較於“‘ 原處以含氣處理氣體的兩步驟 者零偏壓施加於上附=板第或 St第二偏壓。在第二灰化步驟中的電漿處理入 μ si將低或零偏壓施加於基板處之第—灰化步驟期間,將其;te 驟期間’施以增強偏壓並持續灰化製程 = 餘刻殘留购被絲為止。 丨植殘邊以及 【實施方式】 發明名稱為「光阻及侧殘㈣之健移除 利申請案第10/259381號的發明人,亦即本案之 」^ = 程可以用於去除基板上之光阻殘 於1上^之凡是在施加低偏壓或者零偏壓於基板貼附 ί板第二灰化步_ s 以及=====化製程’直到光阻一 雷將ί案發明人瞭解:上述提及的兩步驟式電漿灰化製程可夢由在 對下方介絲減_傷, 1310223 材料(k〜2.7)。對l〇w-k材料的損傷可包含 = 較於f知較 ”,、占根據本發明之一貫施例,在低處理室壓力 十^ =度氫自由基可減少_除在灰化製 ^=之 =至基板的離子通量相當地固定。高離 二自 表柱期間對圖案化介電層的側壁所造成之損傷。 似化 二灰之室-中=一 綠少化,4)在原處灰化_1 室乾物自動腔 氡灰二f 贼化製程之7^範性橫剖面®。在兩步驟含 _圓上之光阻觸、二 壓時,將使料層。當施予零或者低偏 殘餘。第-灰化^處理室經過乾式清理而去除任何聚合物 於笛>· ^mR及可忐存在基板上之少量光阻。 段足2,施加偏壓,且灰化係實施持續-舉例說明,纽後!"餘物110及任何殘留光阻1%之時間 兔明能夠利用含有電容麵合電浆源之電衆處理 1310223 ,統來施行,其中該電容搞合電聚源包含—上 ΐ ,上㈣極更可作為喷頭以將處理以::理ί 施加偏壓則座,用以支撐待處理基板且用以 =可利用其他種__施:==電 驟;=實==^^^ =5_至約1500sccm的處理氣體之m:二κ W肩孔骽(He,Ar,44)或Nj來使用。舉例來 ST 5:^約5〇〇咖之間,而惰性氣體的^速 於約Osccm與約i000sccm之間。例如, )丨 ^例如介於約0W與約騰之間,= c«w., 2200w^ , ㈣ί 一ίΐ子中,第—灰化步驟之製程參數包含2GmT⑽的處理 雷朽t玄CCm的Ar流速、200SCCm的H2流速、300W的上部 f兩步驟灰化製程的第二灰化步驟中,除了在第二灰化 理室壓力小於20mTorr以外,製程參數可包含如上述用於 第一灰化步驟的相同條件。在本發明之一實施例中, :驟:的J理室壓力可小於約10mTorr。在本發明之另一;施例 )GW間之偏壓,其中在第二灰化步驟中施加於基板 1座之 偏壓(第二偏壓)大於在第一灰化步驟中施加於基板支座之偏壓(第 1310223 一偏壓)。 雖然此處係揭露使用射頻(或RF)偏壓,但亦可使用直流偏 壓或以其取储頻偏壓。另外’可在灰化餘細改變處理室壓 力。例如,自第一灰化步驟至第二灰化步驟之處理室壓力可加以 變化。再者’在灰化製程期,可變化處理氣體的組成,例 理氣體(及在處理氣體中之不同氣體之流速比率)可自 驟至第二灰化步驟而加以變化。 乂 或者,於此兩步驟製程期間,可在實質上全部(但非全 物已經從腔室去除後施以偏壓,以增進產能,但卻得 ^ 參 些習知單一步驟製程的效應為代價。 ★呆 再者,賴上述只提及使用單—偏壓,但可由變化性偏壓取 ^例如’偏壓^在第二步驟前、期間、或第二步驟後自二增 強至約100W(連續地或者逐步地,如以每拎量)。 曰 第-步驟的持續時間必須長到足日 2圓表面去除氟碳物質。例如,第—步驟的持續時間範 除任何灰化後殘餘物及任何殘留光阻 頁長 間範圍可自20秒至5〇秒。 州弟-步驟的持續時 或者,在圖2所示之兩步驟製程中,第 判定。-種可能的端點二ϊ ;全=質上全部)聚合物(且可能是光以 除。例如指示此-去除之光譜部分 ,匕自腔至去 775.5nm ^(F)^ 440nm ^(8ίΡ^,ΐ1Ϊί1^·5ηΠ1 ^(C〇) ' 驟。亦可其他提供端點f訊的’可視為完成第一步 化_編_的過度灰 < _餘灰化後殘餘物(PAR)。也就是說,如 10 1310223 在州完成,則第二步驟將以25秒進行5〇%過度 查1GG%過歧化。過度灰化的實際4可藉由檢 里匕又又化至不同程度之基板而憑經驗值加以決定。 、:火化製私後’基板可藉由測量罩蓋層損失、介電側壁損 以及位於特徵部頂端之介電層切面/侵蝕而加以評估。、為了使 實驗=====程條件可藉由直接實驗— 4D;t在第例子中,圖3係概略地顯示在灰化製程期間之罩苗声 丄罩蓋層損耗120係以於介電層⑽之灰化製程 微卿)影像中之罩蓋層1〇2之薄化情二^ 化時,促成所期望之灰化之製程條件可藉由直 接貝驗以及/或貫驗設計法(DOE)加以決定。
在第一例子中,圖4係概略地顯示介電層侧壁損耗。例如, 圖4中之介電層側壁損耗可以介電層暴露於HF溶液後、位於介 層刚之頂端132以及中段15〇的介電層移除量來量測。在 ^圖4中的測試結構可更包含一 SiN層1〇6和Sic層1〇2。為了測 ^側壁損耗,可將電漿灰化過之基板暴露於〇 5%HF溶液持續一 ^約5秒至30秒之時期。隨後基板的SEM分析可用於評估側壁 損耗。 利用終點偵測法來判定何時所有(或實質上所有)的聚合物(以 及可能是光阻)已經從腔室移除的例子,及連同藉由測量罩3蓋層 ,與側壁損耗崎估經灰化基板關子,均完整地綱於共^申 請中之美國專利申請案第10/259381號。 、 ^圖5係顯示根據本發明一實施例的電漿處理系統。電漿處理 系統1裝設以促使在處理室1〇之處理區域45中產生電漿。電漿 處理系統1更包含··一基板支座2〇,待處理基板25係貼附於其= 並與其形成電接觸;一氣體注射系統4〇,用以將處理氣體42通入 電漿處理室10 ;以及一真空幫浦系統5〇。氣體注射系統4〇允許 自異處氣體源運送處理氣體42至處理室10之獨立控制。 11 1310223 々fit氣rf 統4G猶人—可離子化處理氣體42並調整 ,土入力。處理耽體的流速可介於約1Qseem_ 5_麵之間, i 於約2G_與約麵_之間,又或者介於約5GS_與 3 50JS_,。舉例來說,處理室壓力可介於約㈣⑽與約 200mTorr之間,或介於約5mT〇rr與約1〇〇mT〇rr之間, ^ ㈣。控制器%可用來控制真空幫浦 糸、士、50及乱體注射糸統4〇。透過(機赋)基板傳送系統,$ ,,送經過狹槽閥(未顯示〕及處理室饋通部而進入處理室^。,其 統係由位於基板支座2〇内的基板升降銷(未顯示、) 所接收並由座洛於其中之裝置機械式地轉一曰 傳送系統触後,其將下降細歧㈣的J;^板25自基板 A杯?=實f例中,^^係透過靜電夾辦未顯句而貼附於 =的“ V而且’基板支座2°更包含一含有再循環冷卻劑 再循環冷卻劑流係自基板支座2〇接收熱並將^ ΐ之二^換未顯示),或者在加熱時傳送來自熱交換系 义,。另外’風體可經傳送到基板背侧,以改善基板Μ錢 板支座20間之氣體間隙熱傳導。這樣的 ^ =溫度控制於較高或較低溫度下時,働 度時,基板之溫控便有助益,該穩態溫度 =自電漿運送至基板25之熱通量與藉由傳導至基板支座2 ^板f除之熱通量間之平衡所致。在其他實施例巾,加献元件, ^電阻式加熱元件或熱電式加熱⑸冷卻ϋ可包含於基板支座2〇 雷將漿製程處理系統1包含—含有—上板電極7G之射頻 =源/、中该射頻電漿源係透過阻抗匹配網路74而自射乃 =至上板電極7〇。施加麵功率於上板 率筋 至2〇0馳且可為觀ζ。施加於上板電極 約霸與約22卿之間。如上所述,圖5的電以 糸、,先1更包含一射頻源,用以將射頻功率施加於基板支座如以 12 1310223 鈿加偏壓於基板25。該射頻源包含一 網路32,該阻抗匹配網路32之作用在於藉抗匹配 將自電漿傳送至處理區域45之射頻 、抓功率取小化而 知。一種施加射頻功率至基板支座2 、技π中係為已 至30驗且可為2ΜΗζ 典型員率乾圍可自α_ζ 約〇w與約looow之間。另外,的射頻功率可介於 ]及阻抗匹配網路74,以控制施“率射頻產生器 购參考® 5,處理氣體42係 = 理區域45。氣體注射系統4〇可包含而通入處 軋體庄射板而自氣體傳送李 、只丁’及多孔噴頭 ;區域-。在其中喷應到製程處 電極70。 夕札賀頭軋體注·射板可為上板 高速輪^统真⑶^抽,達每,_公升(且更 閘閥。在用於乾式電浆<4刻 處理室壓力的 _公升到3000公升的祕八^吉電二處f裝置中,係採用每秒 壓處理,—般係二^輪刀子真工幫浦(狗。请有助於低 觸阶㈣,則使用機械Π^及^^壓直^而言(亦即大於 pump)〇 曰聖展浦及乾式低真空幫浦(dryroughing 該數處1器:-記憶體、以及-數位I/O埠, 時監測來自電漿處理啟動至電料理祕1之輸入同 係輕合於射頻產生哭'、、、、之輸出的控制電壓。此外,控制器55 匹配網路74、、氣體^阻抗匹配麟32、射難生器72、阻抗 系統5〇,輕、電漿監測系統57、以及真空幫浦 而根據所儲存的^ 13 1310223 ίϊρ5,5二達拉斯之德州儀器所販售之數位訊號處理器 測量電渡穷或電,斷系統中之錢發粒子,如用以 統57可^制哭(Langmuir Probe)。電漿監測系 以麵製程的順錄。㈣狀謎提供回饋, 或-射頻診斷系統。絲水▲測祕57也可包含—微波及/ 4,,®: Γ^ΠίΙ«^ ° 統60的射頻電侧 式即為電子式的旋轉直流磁場系 理均勻性之可自:性】3 了增加電漿密度以及/或改善處 6〇以調整轉速控制器55絲合於旋轉直流磁場系統 漿處據^發批又實關之電漿處理系統。電 率頻咖’其中射頻功 圃《η 職84、精由射頻產生器82而搞合至該感鹿線 _合======圈⑽感應式 ==_Ζ 至 f = =1 介於約5,與約1〇〇_之間。同樣地,2 電極的典型解範圍可自αΐΜΗζ至3qmHz,且可為
之間座的射頻功率可介於約陳與約1〇〇〇W 80斑電漿之間的電六陡法拉第遮屏(未顯示)來降低感應線圈 ㈣及55耦合至射頻產生 ,,u . 便彳工制至感應線圈80之功率施加。 兴例目的因、為矸:丨’於圖5至7所晝的電漿處理系統只是做為 i之處理μ為Ιϊΐΐ殊硬體之許多變化來裝設本發明可能施 將極為明顯、]I讀對於在此技術領域中具有通常知識者 14 1310223 鑑於以上教示,本發明的許多修改與變化是可能的。因此必 須暸解:於所附申請專利範圍之範疇内,本發明可以此處所特別 說明之方式以外者實行。 【圖式簡單說明】 圖1係顯示單一步驟灰化製程之概略橫剖面圖。 圖2係顯示兩步驟灰化製程之概略橫剖面圖。 圖3係概略地顯示在灰化製程期間之罩蓋層損耗。 圖4係概略地顯示介電層側壁損耗。 圖5係顯示根據本發明一實施例的電漿處理系統。 圖6係顯示根據本發明另一實施例之電漿處理系統。 圖7係顯示根據本發明又另一實施例之電漿處理系統。 【主要元件符號說明】 10〜處理室 20〜基板支座 25〜基板 30〜射頻源 32〜阻抗匹配網路 40〜氣體注射系統 42〜處理氣體 45〜處理區域 50〜真空幫浦系統 5 5〜控制器 57〜電漿監測系統 60〜旋轉直流磁場系統 70〜上板電極 72〜射頻源 74〜阻抗匹配網路 15 1310223 80〜感應線圈 82〜射頻源 84〜阻抗匹配網路 100〜結構 102〜罩蓋層 104〜介電層 106〜光阻 106〜SiN層 108〜介電層切面 110〜罩蓋層損耗 110〜灰化後殘留物 112〜氟碳聚合物 120〜灰化第一步驟 120〜罩蓋層損耗 130〜灰化第二步驟 130〜中段介電層損失 132〜頂端介電層損失
Claims (1)
1310223 十、申請專利範圍: i一種原處灰化之方法,包含: 通入包含含氫氣體之處理氣體至電漿處理室内; 在該電漿處理室内產生電漿; ’ 將位於基板支座之頂面上的一基板暴露於該電漿. ,由施加第-偏壓於該基板支座而實行第—灰化步 二偏第二偏壓於該基板支座而實行第二灰化步驟,‘ —扁壓係大於该第一偏壓,其中於該第二灰^ 理室中之處理錢力小於2GmTGrr。 篇1,在该處 2—=申請專利範圍第丨項之原處灰化之 包含H2,NH3,或其組合。 -甲心虱乳體係 3. M 1項之原處灰化之方法,其中該處理氣 包含一惰性氣體 體更 體包 原處灰化之方法’其中該惰性氣 5. = ㈣第一偏壓係 實 質上乾圍第1項之原處灰化之方法,其中該第一偏壓 處灰狀方法,其㈣第二偏壓介 8.如申請專利範圍第1項之原處灰化之方法,其中該第二灰化步 17 1310223 ,更,含用與該第一灰化步驟期間所使用者不同之處理室壓 、处理氣體流速、或該壓力與該處理氣體流速之組合至少其中 之一 〇 ^口申請專利範圍第1項之原處灰化之方法,其中該第-灰化步 驟更包含: 偵測來自該電漿之放射光;以及 從5亥放射光判定該第一灰化步驟的狀態。 10. 如申請專利範圍第9項之原處灰化之方法,其中該放射光的該 偵測提供用以建立終點之方法。 11. 士:申请專利範圍第9項之原處灰化之方法,其中該放射光係源 自一文激物種,且表示在該第—灰化步驟之該狀態上之資訊。 12. 如申^利範圍第9項之原處灰化之方法,其中該放射光係源 自CO、έ氟物種或其組合至少其中之一。 13. 如申請專利範圍帛U項之原處灰化之方法,其中該含氣物種 I4.如^青專利範圍第1項之原處灰化之方法,其中 驟更包含: 偵測來自該電漿之放射光;以及 從該放射S判定該第二灰化步驟的狀態。 難第14項之原處灰化之方法,其中該放射光係 源自-又H且代表在該第二灰化步驟之該狀態上之資訊。 18 1310223 ' 16.如申請專利範圍第15項之原處灰化之方法,其中該放射光係 源自CO、含氟物種或其組合至少其中之一。 17·如申請專利範圍第16項之原處灰化之方法,其中該含氟物種 為氟。 18.如申請專利範圍第1項之原處灰化之方法,更包含: 偵測來自該電漿之放射光;以及 從該放射光判定該第一及第二灰化步驟的狀態。 | 19.如申請專利範圍第18項之原處灰化之方法,其中該放射光係 源自一受激物種’並代表在該第一及第二灰化步驟的該狀態上之 資訊。 20·如申請專利範圍第18項之原處灰化之方法’其中放射光係源 自CO、含氟物種、或其組合至少其中之一。 21·如申請專利範圍第2〇項之原處灰化之方法,其中該含氟物種 係氟。
22·如申請專利範圍第1項之原處灰化之方法,其中該第二灰化步 驟的長度係介於該第一灰化步驟長度的50〇/〇與300%之間。 、、*·、*^申凊專利範圍第1項之原處灰化之方法,其中該處理氣體的 机迷係介於5sccm與1500sccm之間。 24,如由 淹連#/眚專利範圍第1項之原處灰化之方法,其中該含氫氣體的 、〜丨於5sccm與500sccm之間。 19 流迷俾1^利範圍第2項之原處灰化之方法,其中該含氳氣體的 又1糸介於5sccm與500sccm之間。 利,第1項之原處灰化之方法,其中在該第一灰化 之4處理氣體之麵係介於5s_與·s_之間。 利1Ϊ圍第1項之原處灰化之方法,其中在該第二灰化 〜处理氣體之流速係介於5sccm與15〇〇sccm之間。 流速專利严圍第1項之原處灰化之方法,其中該處理氣體之 、在1亥弟一與第二灰化步驟之間變化。 :驟1項之原處灰化之方法,其中在該第-灰化 間。’曰’以處理室中之壓力係介於約lmTorr與約l〇〇〇mTorr之 請專利範圍第1項之原處灰化之方法,其巾在該第一灰化 v驟期間,該處理室中之壓力係介於約5mT與約5〇mT〇rr之間。 ^請專利範圍第1項之原處灰化之方法,其中在該第二灰化 步驟期間,該處理室中之壓力係小於約1〇mT〇rf。 32. 如申請專利範圍第1項之原處灰化之方法,其中在該第二灰化 步驟期間,該處理室中之壓力係小於約5mT〇rr/在^火化 33. 如申請專利範圍第1項之原處灰化之方法,其中該處理室中之 壓力在該第一與第二灰化步驟之間變化。 20 1 4·如申請專利範圍第i項之原處灰化之方法,其中該基板包含低 1310223 介電常數材料、光阻、或蝴殘留物、或其組合。 35·如申請專利範圍第34 數材料包含SiOC材料。、’、处Λ化之方法’其中該低介電常 包含藉 施於該上板 灰㈣法,其懈生包含藉 μ射頻功率施加於一電漿源之感應線圈。 應線圈的糊 ======於該感 懷纖之 41· 一種原處灰化之方法,包含: ,入包含H2氣體之處理氣體; 電極藉抗匹配網路施加於一電漿源之上板 支座精以;:之間的第-偏壓施加於該基板 藉由將介於約卿與約1_W之間的第二偏壓施加於該基 21 1310223 • 板支座,以實行第二灰化步驟,其中該第二偏壓大於該第一偏壓, 且在該第二灰化步驟中的處理室壓力小於20mTorr。 42. 如申請專利範圍第41項之原處灰化之方法,其中該處理氣體 更包含一稀有氣體。 43. 如申請專利範圍第41項之原處灰化之方法,其中施加於該上 板電極的該射頻功率係介於約5 00W與約2200W之間。 十一、圖式: 22
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