TW593644B - Stabilization of peroxygen-containing slurries used in chemical mechanical planarization - Google Patents
Stabilization of peroxygen-containing slurries used in chemical mechanical planarization Download PDFInfo
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- TW593644B TW593644B TW088120488A TW88120488A TW593644B TW 593644 B TW593644 B TW 593644B TW 088120488 A TW088120488 A TW 088120488A TW 88120488 A TW88120488 A TW 88120488A TW 593644 B TW593644 B TW 593644B
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- slurry
- acid
- salt
- stabilizer
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- 239000002002 slurry Substances 0.000 title claims abstract description 46
- 239000000126 substance Substances 0.000 title claims abstract description 18
- 230000006641 stabilisation Effects 0.000 title 1
- 238000011105 stabilization Methods 0.000 title 1
- 239000003381 stabilizer Substances 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims abstract description 32
- 150000003839 salts Chemical class 0.000 claims abstract description 23
- 239000002253 acid Substances 0.000 claims abstract description 21
- 239000004065 semiconductor Substances 0.000 claims abstract description 17
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 16
- 238000005498 polishing Methods 0.000 claims abstract description 13
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052723 transition metal Inorganic materials 0.000 claims abstract description 11
- 150000003624 transition metals Chemical class 0.000 claims abstract description 11
- 229920000137 polyphosphoric acid Polymers 0.000 claims abstract description 10
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 9
- 239000010937 tungsten Substances 0.000 claims abstract description 9
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 239000000758 substrate Substances 0.000 claims abstract description 7
- 239000003989 dielectric material Substances 0.000 claims abstract description 4
- VZWGHDYJGOMEKT-UHFFFAOYSA-J sodium pyrophosphate decahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.[Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O VZWGHDYJGOMEKT-UHFFFAOYSA-J 0.000 claims abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052802 copper Inorganic materials 0.000 claims abstract description 3
- 239000010949 copper Substances 0.000 claims abstract description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- XPPKVPWEQAFLFU-UHFFFAOYSA-N diphosphoric acid Chemical compound OP(O)(=O)OP(O)(O)=O XPPKVPWEQAFLFU-UHFFFAOYSA-N 0.000 claims description 8
- 230000002079 cooperative effect Effects 0.000 claims description 7
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 claims description 6
- 229940048086 sodium pyrophosphate Drugs 0.000 claims description 6
- 235000019818 tetrasodium diphosphate Nutrition 0.000 claims description 6
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 4
- 229940005657 pyrophosphoric acid Drugs 0.000 claims description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- VYTBPJNGNGMRFH-UHFFFAOYSA-N acetic acid;azane Chemical class N.N.CC(O)=O.CC(O)=O.CC(O)=O.CC(O)=O VYTBPJNGNGMRFH-UHFFFAOYSA-N 0.000 claims description 2
- 235000011180 diphosphates Nutrition 0.000 claims 4
- 229940048084 pyrophosphate Drugs 0.000 claims 4
- 150000004691 decahydrates Chemical group 0.000 claims 2
- 230000000087 stabilizing effect Effects 0.000 claims 1
- 150000007513 acids Chemical class 0.000 abstract description 5
- 239000005725 8-Hydroxyquinoline Substances 0.000 abstract 1
- 229960003540 oxyquinoline Drugs 0.000 abstract 1
- MCJGNVYPOGVAJF-UHFFFAOYSA-N quinolin-8-ol Chemical compound C1=CN=C2C(O)=CC=CC2=C1 MCJGNVYPOGVAJF-UHFFFAOYSA-N 0.000 abstract 1
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 40
- 239000004020 conductor Substances 0.000 description 6
- 238000011049 filling Methods 0.000 description 6
- 239000002738 chelating agent Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000007800 oxidant agent Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- -1 but not limited to Chemical class 0.000 description 2
- MAYPHUUCLRDEAZ-UHFFFAOYSA-N chlorine peroxide Chemical compound ClOOCl MAYPHUUCLRDEAZ-UHFFFAOYSA-N 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 150000002978 peroxides Chemical class 0.000 description 2
- 238000001020 plasma etching Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical group [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 241000282320 Panthera leo Species 0.000 description 1
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical compound OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 description 1
- SMWDFEZZVXVKRB-UHFFFAOYSA-N Quinoline Chemical compound N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- OMBRFUXPXNIUCZ-UHFFFAOYSA-N dioxidonitrogen(1+) Chemical compound O=[N+]=O OMBRFUXPXNIUCZ-UHFFFAOYSA-N 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- HSOHROOUHRUSJR-UHFFFAOYSA-N n-[2-(5-methoxy-1h-indol-3-yl)ethyl]cyclopropanecarboxamide Chemical compound C12=CC(OC)=CC=C2NC=C1CCNC(=O)C1CC1 HSOHROOUHRUSJR-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052762 osmium Inorganic materials 0.000 description 1
- SYQBFIAQOQZEGI-UHFFFAOYSA-N osmium atom Chemical compound [Os] SYQBFIAQOQZEGI-UHFFFAOYSA-N 0.000 description 1
- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 description 1
- CSHWQDPOILHKBI-UHFFFAOYSA-N peryrene Natural products C1=CC(C2=CC=CC=3C2=C2C=CC=3)=C3C2=CC=CC3=C1 CSHWQDPOILHKBI-UHFFFAOYSA-N 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002959 polymer blend Polymers 0.000 description 1
- 229910052704 radon Inorganic materials 0.000 description 1
- SYUHGPGVQRZVTB-UHFFFAOYSA-N radon atom Chemical compound [Rn] SYUHGPGVQRZVTB-UHFFFAOYSA-N 0.000 description 1
- 241000894007 species Species 0.000 description 1
Classifications
-
- 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
- H01L21/04—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
- H01L21/3205—Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
- H01L21/321—After treatment
- H01L21/32115—Planarisation
- H01L21/3212—Planarisation by chemical mechanical polishing [CMP]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/04—Lapping machines or devices; Accessories designed for working plane surfaces
- B24B37/042—Lapping machines or devices; Accessories designed for working plane surfaces operating processes therefor
- B24B37/044—Lapping machines or devices; Accessories designed for working plane surfaces operating processes therefor characterised by the composition of the lapping agent
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
- C09K3/1454—Abrasive powders, suspensions and pastes for polishing
- C09K3/1463—Aqueous liquid suspensions
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Colloid Chemistry (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
- Thin Film Transistor (AREA)
Description
經濟部智慧財產局員工消費合作社印製 593644 A7 _ B7 五、發明說明(1 ) 發明領域: 本發明是有關於半導體裝置的製造以及加工,且更 特別的是有關於一種穩定含過氧物之化學機械平坦化用研 漿的方法。 5 發明背景: 兩個存在於半導體裝置製造領域的趨勢,其包括擁 有平坦的結構以及降低位在半導體基底上之結構的污染。 化學機械研磨法(CMP)則是越來越頻繁地被用來達成以上 此二趨勢。大多數的半導體製造廠商使用CMP來平坦化 10 介電層以及一些金屬結構。在CMP製程中,最普通的方 法是使半導體晶圓藉由一托座墊而附著於一個載體上(其 可旋轉或不旋轉),然後使裸露的晶圓表面與一個研磨墊 (其乃位在一個旋轉或不旋轉的平台上)接觸並加以研磨。 此存在於晶圓表面以及研磨墊之間的機械磨耗,導致晶圓 15 表面被研磨。為了輔助研磨以及清除任何在研磨過程中所 釋放出來的顆粒,晶圓表面和研磨墊之間經常被加入一種 研漿。這些研漿中的化學成分會與晶圓表面反應,然後使 得晶圓更容易被研磨,且多餘的研漿可將研磨步驟中晶圓 所釋放出來的材料帶走。 20 目前,半導體工業大多數使用的製程,包括形成一 層導電材料或絕緣材料,接著再進行此材料的平坦化處理 (一般是CMP)。例如,沉積一厚度相較其他結構為厚的介 電層於整個晶圓表面。由於底層的抬樸學,此層上部表面 之同度具有相當可察覺程度的差異。由於該上表面之高度 ----.—^-----衣 (請先閱讀背面之注意事項再填寫本頁) 訂---------線i
593644 A7 經濟部智慧財產局員工消費合作社印製 五、發明說明() 差異,利用目前的製版術方法以及儀器,要在此層被定義 成通道洞/溝渠以形成導電互連線時將會有困難。因此, 在定義這些通道洞之前,需要一平坦化步驟。此步驟,通 常是利用CMP來完成,其將產生一相當平坦的介電層上 5 表面。 此外’ CMP可在導電材料(例如鹤、鋼、銘或其他金 屬/金屬組合物)覆蓋形成後被使用,以形成鑲叙的導電結 構,例如通道及/或互連線。相較於如反應性離子蝕刻 (RIE),CMP的使用是較乾淨且可產生較平坦的結構。通 常,金屬化結構之形成是自利用CMP先在介電層内形成 複數個用於通道及/或互連線之開口,然後再全面性地(或 選擇性地)形成導電材料,填充用於通道及/ 窗 口。為了適當地填充這些開口,較佳地是沉積過量的導電 物材料於此晶圓上。此將在開口以外區域之介電層上,〆 成-導電材料層。CMP製程則被用來去除多餘的二料。< 之丰些金屬化結構中’多餘的導電材料(或介電材料) ^除速率可藉由在CMP過程中導人_種氧化劑,使部 ==材料變成至少部分氧化而被提高。此理由是因 去除γΓΓ材料是較軟的,因而比此材料本身更容易被 制平坦化二:氧 d;此,-些半導體裝置製造商乃 (通常是:過氧化氫或其他氧化劑,使得部分鑛 病結構的了_被氧化,因岐這些部分較易被去 10 15 20 -4- —.—4—衣 (請先閱讀背面之注意事項再填寫本頁)
訂----------線I 本紙張歧細 (210 X 297 公釐) 593644 經濟部智慧財產局員工消費合作社印製 A7 ______B7_ 五、發明說明(3 ) 除。這些過氧化物可在使用研漿以研磨欲去除之材料層 前’先加入研漿中,或者分別被加入至墊上。然而,為了 增加控制和操控的簡便性,較佳的是在研漿被傳送到 CMP工具前,以大約1至1〇重量百分比的比例將過氧化 5 氫作匕入研漿中。請參閱John P· Bare & Budge Johl, Evaluation of Manufacturing Handling Characteristics of Hydrogen Peroxide-Based Tungsten CMP Slurry, IEEE/CPMT INTERNATIONAL ELECTRONICS MANUFACTURING TECHNOLOGY SYMPOSIUM 164-171 (1998)。然而,此方 10法有一個問題是含過氧氣之研漿具有短暫的儲存壽命。含 過氧氣之研漿在工業上的觀察通常在靜止的水浴内會以每 天約0·1重量百分比之比率分解,亦即此研漿會每夫明顯 的減少。第1圖之曲線102顯示的是一般商業上可購得之 鎢研漿之過氧化氫分解情況。此過氧化氫的分解結果是使 15用此研漿之CMP製程之速率會以一定速率降低,而無法 兀全達到預定的效果。最後,研磨去除之速率將變得非常 慢’研漿將不可再被使用,而必須被丟棄。 此分解的現象可歸咎於許多不同的理由。許多產業 已w π 外線對研漿的照射、溫度的升高以及一些研漿的 20高酸鹼值是摻入研漿之過氧化氫之分解的控制主因。然 而,本申請案之發明人則發現存在於研漿中之過渡金屬可 控制研漿中之過氧化物的分解。研漿中之過渡金屬將會迅 速地催化過氧化氫的分解,進而形成水和氧氣之副產物。 (請先閱讀背面之注意事項再填寫本頁) 衣 (再填寫太 Ί I I I I I -
經濟部智慧財產局員工消費合作社印製 593644 A7 五、發明說明(4 ) 發明概要: 本發明之一實施例是_種在利用化學機械平坦化之 半導體基底上製造電子裝置的方法,其包括下列步驟:形 成一材料層於該半導體晶圓上;利用一研磨墊以及一種含 5過氧氣之研漿研磨該材料層;且其中該研漿更包括一種穩 定劑,其可阻礙該研漿内之過氧氣的分解。較佳地是,此 穩定劑選自下列群:焦磷酸、多膦酸、多鱗酸、乙二胺四 乙酸、一種該焦磷酸的鹽、一種該多膦酸的鹽、一種該多 磷酸的鹽、一種該乙二胺四乙酸的鹽以及其任意組合。此 10外,此穩定劑可選自下列群:十水焦磷酸鈉及/或8-氫氧 基嗅淋。研聚中之過氧氣的分解是被該研漿内所含之過霁 金屬所催化,且可被研漿之酸鹼值所影響。此材料層較佳: 的是遠自下列群·鎢、鋼、鋁、介電材料以及其任意組: 合。 , 15 本發明之另一貫施例是一種化學機械研磨位在半導 體基底表面之層的方法,其包括下列步驟:將一種含過氧 氣-之物質以及-種穩定劑與研㈣合,形成—種研漿混合 物;將該研漿混合物保存一段時間;利用該研聚混合物以 及-個化學韻研磨機械於半導縣録面上的該層 20進行平坦化;且其中該穩定劑選自下列群:十水焦構酸 納、焦碟酸、多膦酸、多鱗酸、乙二胺四乙酸、一種該焦 磷酸的鹽、一種該多膦酸的鹽、一種該多磷酸的鹽、一種 該乙二胺四乙酸的鹽、8-氫氧基嗜琳以及其任意組合。較 佳地是此穩定劑更包括十水焦碟酸鈉。 本紙張尺度適用中國國家標準(CNS)A4規格(21〇X 297公釐) ------------------r--,訂---------線· (請先閱讀背面之注意事項再填寫本頁) 593644 A7 發明說明( 10 15 經濟部智慧財產局員工消費合作社印製 20 圖式之簡單說明: 第1圖顯示的是摻混過氧 研漿之過氧化氫對時間之分解圖;氧作為氧化劑之W2_ 第2圖顯示的是本發一徐A W2000研漿内之過氧化氫的濃度/施例巾摻混穩定劑之 弟3圖顯示的是本發明—〜 獅〇〇研_之過氧化氫的施财摻混穩定劑之 之w:〇4二顯:的是本發明—較佳實施例中摻混穩定劑 之W2〇00研漿内之過氧化氫的濃度。 弟5圖顯示的是本發明另 ^ ^月另一較佳實施例中摻混穩定 劑之W2000研漿内之過氧化氫的濃度。 圖式之詳細說明: 雖然,以下描述的是使用過氧化氫之嫣CMP製程, 但本發明可用於任何使用含過氧氣之研椠的⑽製程。 例如,可去除除鎢以外的導電材料。此外,任何穩定劑均 可被使用,只要其具有町特性:⑴有能力與水溶性或有 機性基質内之過渡金屬(包括但不限於,例如鐵、銅、 鈷猛、鎳和鉻)結合;(2)實質未被過渡金屬污染;(3)其 在含過氧氣之研漿混合物中是可溶的;(4)穩定劑不會在 CMP過程中阻礙被研磨層之研磨速率;(5)不會顯著地改 變CMP研漿中之研磨顆粒的大小。這些例子包括:焦填 酸、多膦酸、多磷酸、乙二胺四乙酸(EDTA)、上述之酸的 鹽’以及上述之酸和上述酸之鹽的組合物,以及氫氧基嗜 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) —.—.-----------,—訂—-----線. (請先閱讀背面之注意事項再填寫本頁) 593644 經濟部智慧財產局員工消費合作社印製 A7 五、發明說明(6 ) · 啉。此外’此研聚可由任何形式的研聚所組成,其中之過 渡金屬如同污染物般存在於研毁中。 以下的圖示要顯示的H r ^ J疋Cabot月又伤有限公司開發出 來用以研磨含鎢層之研激(以W2〇〇〇表示)内的過氧化氮濃 5度。請參閱第1圖,曲線1〇2顯示的是㈣⑻研褒内不 穩定的過氧化氫之分解。如第i圖所示,過氧化氯在加入 W2000研漿内9天後之濃度為原本摻混時之百分之6〇。 第2圖和第3圖顯示的是不同的螯合劑,例如 EDTA、EDTA鹽、膦酸和氫氧基喹啉,不必然提供其所 10需要的穩定度。事實上,每一種測試過的螯合劑均會促進 過氧化氫的分解。然而,假使這些螯合劑之用量不同、或 純化以去除任何污染,例如過渡金屬,或者與不同的研漿: 使用或與其他化學品(其本身可為穩定劑或不為穩定劑)合 併使用,這些螯合劑中的一種或數種(單獨或合併使用或: 15與其他化學品合併使用)則可提供適當的穩定度。熟習此 技藝者,在參閱本發明之說明書所揭露之技術後,當可在 不f任何過度的實驗下達成此類混合物或者用量。 第4圖顯示的是本發明之一較佳實施例的穩定圖解 (圖形402),其中過氧化氫原本之濃度較佳的是摻混過氧 20 化氫後之W2000研漿之大約2重量百分比。在此實施例 中,由於使用的鎢CMP製程之動力學,穩定劑較佳用量 是約2克焦磷酸鈉/每2000克的研漿混合物,且氳氣濃度 之下限則是約1.5重量百分比。焦磷酸鈉之用量可視提供 較佳的穩定度而加以改變。假使使用不同的研漿,更多或 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) ----一---f--------I------- ^ . I---I I I I « (請先閱讀背面之注意事項再填寫本頁) 593644 A7 ________B7__— __ 五、發明說明(7 ) 更少穩定劑(或甚至不同的穩定劑)均是可行的。 弟5圖顯示的是本發明另一個較佳實施例之數個穩 定度圖形,其中過氧化氫之開始濃度較佳的是佔摻混過氧 化氫之W2000研漿之大約4重量百分比。在此實施例 5 中,由於使用的鎢CMP製程之動力學,穩定劑較佳的是 約0.25至3克(更佳的是約〇·25至1克,甚至更佳的是約 0·5克)焦磷酸鈉/每1000克的研漿,且氫氣濃度之下限是 約百分之3.8。焦磷酸鈉之用量可視提供較佳的穩定度而 加以改變。假使使用不同的研漿,更多或更少穩定劑(或 10 甚至不同的穩定劑)均是可行的。 雖然,本發明已揭露如上所述之實施例,然其並非 用以限定本發明之專利範圍。本發明之許多實施例,對於 熟習此技藝者在參閱本發明之說明書所揭露的方法與技術 後是顯而易見的。 -----r--訂· C請先閲讀背面之浲意事頊瑚填寫本貢) 項并填寫. 經濟部智慧財彦局員工消費合作社印製 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐)
Claims (1)
- 593644 A8 B8 C8 D8 六、申請專利範圍 … 專利申請案第88120488號 ROC Patent Appln. No. 88120488 修正後無劃線之中文申請專利範圍修正本-附件二 Amended Claims in Chinese - Enel. (II) 5 (民國93年5月7曰送呈) (Submitted on May 7 , 2004) 1. 一種在利用化學機械平坦化之半導體基底上製造電子 裝置的方法,該方法包括下列步驟: 10 提供一半導體晶圓; 形成一材料層於該半導體晶圓上; 利用一研磨墊以及一種含過氧氣及過渡金屬之混合物 之研漿研磨該材料層;及 將該研漿以一種穩定劑穩定化,該穩定劑係選自十水 15 焦磷酸鈉、焦磷酸、多膦酸、多磷酸、乙二胺四乙 酸、一種該焦填酸的鹽、一種該多膦酸的鹽、一種該 多磷酸的鹽、一種該乙二胺四乙酸的鹽以及其任意組 合所組成的群集,其中該穩定劑可阻礙該包含該過渡 金屬之研漿内之過氧氣的分解。 20 2.如申請專利範圍第1項所述之方法,其中該穩定劑係 包括十水焦鱗酸納。 經濟部智慧財產局員工消費合作社印製 3. 如申請專利範圍第1項所述之方法,其中該穩定劑包 括選自下列群:焦磷酸、多膦酸、多磷酸、乙二胺四 乙酸、一種該焦磷酸的鹽、一種該多膦酸的鹽、一種 25 該多磷酸的鹽、一種該乙二胺四乙酸的鹽以及其任意 組合之化學品。 4. 如申請專利範圍第1項所述之方法,其中該穩定劑包 括8-氫氧基喳咁。 -10 - 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) 88435B 接 593644 A8 B8 C8 _D8_ 六、申請專利範圍 5. 如申請專利範圍第1項所述之方法,其中在該研漿中 之過氧氣的分解是被該研漿内之過渡金屬所催化。 6. 如申請專利範圍第1項所述之方法,其中該研漿中之 過氧氣之分解受該研漿之酸驗值所影響。 5 7.如申請專利範圍第1項所述之方法,其中該材料層選 自下列群:鎢、銅、鋁、介電材料以及其任意組合。 8. 如申請專利範圍第1項所述之方法,其中該穩定劑的 量為每1000克該研漿有0.25至1克。 9. 一種化學機械研磨位在半導體基底表面之層的方法, 10 其包括下列步驟: 將一種含過氧氣之物質以及一種穩定劑與研漿混合, 形成一種包含過渡金屬之研漿混合物; 將該研漿混合物保存一段時間;及 利用該研漿混合物以及一個化學機械研磨機械對位於 15 半導體基底表面上的該層進行平坦化; 該穩定劑具有阻礙該研漿中會過氧氣物質之分解的能 力,並包括選自下列群之化學品:十水焦磷酸鈉、焦 磷酸、一種該焦磷酸的鹽以及其任意組合。 經濟部智慧財產局員工消費合作社印製 10. 如申請專利範圍第9項之方法,其中該穩定劑包括十 20 水焦鱗酸鈉。 11. 如申請專利範圍第9項所述之方法,其中該穩定劑的 量為每1000克該研漿有0.25至1克。 -11 - 本紙張尺度適用中國國家標準(CNS)A4規格(210x297公釐)
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-
1999
- 1999-11-12 SG SG1999005629A patent/SG73683A1/en unknown
- 1999-11-22 US US09/447,172 patent/US6448182B1/en not_active Expired - Lifetime
- 1999-11-23 KR KR1019990052013A patent/KR100626768B1/ko active IP Right Grant
- 1999-11-24 EP EP99203930A patent/EP1004648B1/en not_active Expired - Lifetime
- 1999-11-24 JP JP11332999A patent/JP2000164541A/ja active Pending
- 1999-11-24 WO PCT/US1999/028087 patent/WO2000032713A1/en active Application Filing
- 1999-11-24 US US09/444,715 patent/US6530967B1/en not_active Expired - Fee Related
- 1999-11-24 AT AT99203930T patent/ATE484561T1/de not_active IP Right Cessation
- 1999-11-24 AU AU20322/00A patent/AU2032200A/en not_active Abandoned
- 1999-11-24 CN CNB991258363A patent/CN1184272C/zh not_active Expired - Fee Related
- 1999-11-24 DE DE69942852T patent/DE69942852D1/de not_active Expired - Lifetime
- 1999-12-02 TW TW088120488A patent/TW593644B/zh not_active IP Right Cessation
Also Published As
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KR20000035614A (ko) | 2000-06-26 |
US6530967B1 (en) | 2003-03-11 |
WO2000032713A1 (en) | 2000-06-08 |
CN1255521A (zh) | 2000-06-07 |
JP2000164541A (ja) | 2000-06-16 |
WO2000032713A9 (en) | 2002-08-22 |
ATE484561T1 (de) | 2010-10-15 |
US6448182B1 (en) | 2002-09-10 |
AU2032200A (en) | 2000-06-19 |
SG73683A1 (en) | 2000-06-20 |
DE69942852D1 (de) | 2010-11-25 |
KR100626768B1 (ko) | 2006-09-25 |
EP1004648B1 (en) | 2010-10-13 |
CN1184272C (zh) | 2005-01-12 |
EP1004648A1 (en) | 2000-05-31 |
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