JP7373026B2 - 半導体工程用研磨組成物及びそれを用いた研磨された物品の製造方法 - Google Patents
半導体工程用研磨組成物及びそれを用いた研磨された物品の製造方法 Download PDFInfo
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- JP7373026B2 JP7373026B2 JP2022110085A JP2022110085A JP7373026B2 JP 7373026 B2 JP7373026 B2 JP 7373026B2 JP 2022110085 A JP2022110085 A JP 2022110085A JP 2022110085 A JP2022110085 A JP 2022110085A JP 7373026 B2 JP7373026 B2 JP 7373026B2
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- 239000007921 spray Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 1
- 229960000281 trometamol Drugs 0.000 description 1
- 229960004799 tryptophan Drugs 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000001132 ultrasonic dispersion Methods 0.000 description 1
- 229910001868 water Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09G—POLISHING COMPOSITIONS; SKI WAXES
- C09G1/00—Polishing compositions
- C09G1/02—Polishing compositions containing abrasives or grinding agents
-
- 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
-
- 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
- C09K3/1409—Abrasive particles per se
-
- 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
-
- 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
- H01L21/304—Mechanical treatment, e.g. grinding, 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
- H01L21/302—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
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/30625—With simultaneous mechanical treatment, e.g. mechanico-chemical polishing
-
- 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
- H01L21/31051—Planarisation of the insulating layers
- H01L21/31053—Planarisation of the insulating layers involving a dielectric removal step
-
- 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]
-
- 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
- H01L21/76883—Post-treatment or after-treatment of the conductive material
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Description
研磨粒子を含み、
前記研磨粒子は、D50に該当する全体平均粒径を有し、
前記研磨粒子は、平均粒径が異なる複数の研磨粒子群を含み、
第1研磨粒子群は、前記全体平均粒径の22.5倍超125倍以下の粒径を有する群であり、
第2研磨粒子群は、前記全体平均粒径の0.5倍超2.5倍以下の粒径を有する群であり、
吸光度は、下記式1で定義され、
前記第2研磨粒子群の吸光度であるA2と、前記第1研磨粒子群の吸光度であるA1との比率であるA1/A2が1.5以下であってもよい。
吸光度=log(I0/I1)
前記第2研磨粒子群の吸光度であるA2と、前記第1a研磨粒子群の吸光度であるA1aとの比率であるA1a/A2が0.8以下であってもよい。
シリコンウエハを対象として研磨する際に、研磨率が1000Å/min以上であり、
研磨されたシリコンウエハのスクラッチの発生が1個未満である。
前記による半導体工程用研磨組成物を用いて目的物を研磨する研磨ステップを含み、
前記目的物は、基板、前記基板に形成された金属、及び前記基板に形成された絶縁膜のいずれか1つ以上であってもよい。
前記凹部パターン又は凸部パターンは金属を含み、
前記凹部パターンの幅は3nm~16nmであってもよい。
前記の目的を達成するために、一実施例に係る半導体工程用研磨組成物は、
研磨粒子を含み、
前記研磨粒子は、D50に該当する全体平均粒径を有し、
前記研磨粒子は、平均粒径が異なる複数の研磨粒子群を含み、
第1研磨粒子群は、前記全体平均粒径の22.5倍超125倍以下の粒径を有する群であり、
第2研磨粒子群は、前記全体平均粒径の0.5倍超2.5倍以下の粒径を有する群であり、
吸光度は、下記式1で定義され、
前記第2研磨粒子群の吸光度であるA2と、前記第1研磨粒子群の吸光度であるA1との比率であるA1/A2が1.5以下である。
吸光度=log(I0/I1)
前記の目的を達成するために、具現例に係る半導体工程用研磨組成物の製造方法は、
準備された研磨粒子を溶媒と共に分散させ、これに添加剤を加えた研磨組成物を設ける混合ステップと、
前記研磨組成物において、全体平均粒径(D50)が20nm~60nmの研磨粒子を分離する選別ステップとを含むことができる。
前記の目的を達成するために、具現例に係る研磨された物品の製造方法は、
前記半導体工程用研磨組成物を用いて目的物を研磨する研磨ステップを含み、
前記目的物は、基板、前記基板に形成された金属、及び前記基板に形成された絶縁膜(図にはSiO2を例示するが、これに限定されない)のいずれか1つ以上であってもよい。
pHが4.2であり、ゼータ電位が+24mVであり、全体平均粒径(D50)が38nmであり、アミノシランで表面改質されたコロイダルシリカ及び脱イオン水を含むシリカ組成物を準備した。前記シリカ組成物に、添加剤として、分散性の向上及びスラリーの濡れ性の向上のための非イオン性界面活性剤として、Mw分子量が600であるポリエチレングリコール、粒子性欠陥(particle defect)の除去剤としてフッ素系界面活性剤を適用し、2時間の間、350rpmのレベルで十分に撹拌した。その次に、約0.07μmの平均気孔粒径を有する5インチのカプセルフィルター(micropore社製)を介してフィルタリングし、相対的に大きい粒子を選別して分離及び除去した。
前記実施例1において、下記表1の条件に変更した研磨組成物を実施例2~4として設け、下記の実験例を通じて粒度分布別の吸光度分率を表2に示した。
前記実施例1において、共通してカプセルフィルターを介したフィルタリング過程を省略し、下記表1の条件に変更した研磨組成物を比較例として設け、下記の実験例を通じて粒度分布別の吸光度分率を表2に示した。
前記実施例及び比較例で設けられた研磨粒子を脱イオン水と0.3wt%に希釈したスラリーを設け、このスラリーをCPS Instruments社のDC24000 UHRを通じて、粒度分布に対する吸光度を測定した。
(A1/A2)*:(第1研磨粒子群の吸光度)/(第2研磨粒子群の吸光度)
(A1a/A2)*:(第1a研磨粒子群の吸光度)/(第2研磨粒子群の吸光度)
図5(b)に示したように、配線溝が形成された酸化珪素膜、前記酸化珪素膜の表面上に形成されたTi/TiNバリア層、前記バリア層上に形成されたW配線金属を含む直径300mmのパターンウエハを設けた。その次に、、図4のようなCMP研磨装備を用いて、前記シリコンウエハを研磨ヘッドに固定し、前記研磨パッド積層体を付着した定盤上に、シリコンウエハの表面が下方に向かうように設定した。その次に、研磨圧力が1.0psiになるように調整し、研磨パッド上に前記表2の実施例及び比較例に該当するスラリーを250ml/minの速度で投入しながら、定盤を103rpm、研磨ヘッドを97rpmで1分間回転させてウエハの表面を研磨した。
11 投入部
12 拡散部
13 選別部
14 測定部
14a 照射部
14b センサ
15 本体
16 回転部
100 接着層
200 研磨パッド
300 定盤
310 定盤回転軸
400 研磨ヘッド
410 ヘッド回転軸
500 噴射ノズル
W 基板
S 研磨組成物
Claims (10)
- 研磨粒子を含み、
前記研磨粒子は、D50に該当する全体平均粒径を有し、
前記研磨粒子は、平均粒径が異なる複数の研磨粒子群を含み、
第1研磨粒子群は、前記全体平均粒径の22.5倍超125倍以下の粒径を有する群であり、
第2研磨粒子群は、前記全体平均粒径の0.5倍超2.5倍以下の粒径を有する群であり、
吸光度は、下記式1で定義され、
前記第2研磨粒子群の吸光度であるA2と、前記第1研磨粒子群の吸光度であるA1との比率であるA1/A2が1.5以下である、半導体工程用研磨組成物。
[式1]
吸光度=log(I0/I1)
(前記式1において、I0は、前記半導体工程用研磨組成物を遠心分離して粒度勾配を形成した液相に385nm~425nmの波長のうち少なくとも1つの波長の光を照射した際の光量であり、I1は、前記照射した光量が前記液相を透過した光量である。) - 前記研磨粒子の全体平均粒径(D50)は20nm~60nmである、請求項1に記載の半導体工程用研磨組成物。
- 全研磨粒子の吸光度に対する前記第1研磨粒子群の吸光度分率が50%以下である、請求項1に記載の半導体工程用研磨組成物。
- 全研磨粒子の吸光度に対する前記第2研磨粒子群の吸光度分率が38%以上である、請求項1に記載の半導体工程用研磨組成物。
- 第1a研磨粒子群は、前記全体平均粒径の37.5~125倍の粒径を有する群であり、
前記第2研磨粒子群の吸光度であるA2と、前記第1a研磨粒子群の吸光度であるA1aとの比率であるA1a/A2が0.8以下である、請求項1に記載の半導体工程用研磨組成物。 - 前記研磨粒子は、シリカ、セリア、水酸化セリウム、ダイヤモンド、ジルコニア、チタニア、ゼオライト及び窒化シリコンからなる群から選択されたいずれか1つ以上の研磨粒子を含む、請求項1に記載の半導体工程用研磨組成物。
- 前記研磨粒子を5重量%以上、20重量%以下で含み、分散剤、腐食防止剤、研磨率向上剤、pH調節剤及び界面活性剤から選択された1つ以上の添加剤を含む、請求項1に記載の半導体工程用研磨組成物。
- 前記式1において、前記遠心分離時の回転速度は14000rpmであり、前記液相の粘度は1.8cpである、請求項1に記載の半導体工程用研磨組成物。
- スクラッチは、1μm以上の長さを有する欠陥であり、
シリコンウエハを対象として研磨する際に、研磨率が1000Å/min以上であり、
研磨されたシリコンウエハのスクラッチの発生が1個未満である、請求項1に記載の半導体工程用研磨組成物。 - 半導体工程用研磨組成物を用いて目的物を研磨する研磨ステップを含み、
前記目的物は、基板、前記基板に形成された金属、及び前記基板に形成された絶縁膜のいずれか1つ以上であり、
前記半導体工程用研磨組成物は、
研磨粒子を含み、
前記研磨粒子は、D50に該当する全体平均粒径を有し、
前記研磨粒子は、平均粒径が異なる複数の研磨粒子群を含み、
第1研磨粒子群は、前記全体平均粒径の22.5倍超125倍以下の粒径を有する群であり、
第2研磨粒子群は、前記全体平均粒径の0.5倍超2.5倍以下の粒径を有する群であり、
吸光度は、下記式1で定義され、
前記第2研磨粒子群の吸光度であるA2と、前記第1研磨粒子群の吸光度であるA1との比率であるA1/A2が1.5以下である、研磨された物品の製造方法。
[式1]
吸光度=log(I0/I1)
(前記式1において、I0は、前記半導体工程用研磨組成物を遠心分離して粒度勾配を形成した液相に385nm~425nmの波長のうち少なくとも1つの波長の光を照射した際の光量であり、I1は、前記照射した光量が前記液相を透過した光量である。)
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CN115595068A (zh) | 2023-01-13 |
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