JP7296504B2 - 半導体工程用研磨組成物および研磨組成物を適用した半導体素子の製造方法 - Google Patents
半導体工程用研磨組成物および研磨組成物を適用した半導体素子の製造方法 Download PDFInfo
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- JP7296504B2 JP7296504B2 JP2022061756A JP2022061756A JP7296504B2 JP 7296504 B2 JP7296504 B2 JP 7296504B2 JP 2022061756 A JP2022061756 A JP 2022061756A JP 2022061756 A JP2022061756 A JP 2022061756A JP 7296504 B2 JP7296504 B2 JP 7296504B2
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- 238000005516 engineering process Methods 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000004811 fluoropolymer Substances 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
- QFWPJPIVLCBXFJ-UHFFFAOYSA-N glymidine Chemical compound N1=CC(OCCOC)=CN=C1NS(=O)(=O)C1=CC=CC=C1 QFWPJPIVLCBXFJ-UHFFFAOYSA-N 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 125000001972 isopentyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000000555 isopropenyl group Chemical group [H]\C([H])=C(\*)C([H])([H])[H] 0.000 description 1
- 238000012538 light obscuration Methods 0.000 description 1
- 239000001630 malic acid Substances 0.000 description 1
- 235000011090 malic acid Nutrition 0.000 description 1
- 229960002510 mandelic acid Drugs 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- ARYZCSRUUPFYMY-UHFFFAOYSA-N methoxysilane Chemical compound CO[SiH3] ARYZCSRUUPFYMY-UHFFFAOYSA-N 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 125000002950 monocyclic group Chemical group 0.000 description 1
- INJVFBCDVXYHGQ-UHFFFAOYSA-N n'-(3-triethoxysilylpropyl)ethane-1,2-diamine Chemical compound CCO[Si](OCC)(OCC)CCCNCCN INJVFBCDVXYHGQ-UHFFFAOYSA-N 0.000 description 1
- PHQOGHDTIVQXHL-UHFFFAOYSA-N n'-(3-trimethoxysilylpropyl)ethane-1,2-diamine Chemical compound CO[Si](OC)(OC)CCCNCCN PHQOGHDTIVQXHL-UHFFFAOYSA-N 0.000 description 1
- NHBRUUFBSBSTHM-UHFFFAOYSA-N n'-[2-(3-trimethoxysilylpropylamino)ethyl]ethane-1,2-diamine Chemical compound CO[Si](OC)(OC)CCCNCCNCCN NHBRUUFBSBSTHM-UHFFFAOYSA-N 0.000 description 1
- BVBBZEKOMUDXMZ-UHFFFAOYSA-N n,n-diethyl-3-triethoxysilylpropan-1-amine Chemical compound CCO[Si](OCC)(OCC)CCCN(CC)CC BVBBZEKOMUDXMZ-UHFFFAOYSA-N 0.000 description 1
- XCOASYLMDUQBHW-UHFFFAOYSA-N n-(3-trimethoxysilylpropyl)butan-1-amine Chemical compound CCCCNCCC[Si](OC)(OC)OC XCOASYLMDUQBHW-UHFFFAOYSA-N 0.000 description 1
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 description 1
- UMXXGDJOCQSQBV-UHFFFAOYSA-N n-ethyl-n-(triethoxysilylmethyl)ethanamine Chemical compound CCO[Si](OCC)(OCC)CN(CC)CC UMXXGDJOCQSQBV-UHFFFAOYSA-N 0.000 description 1
- 125000002868 norbornyl group Chemical group C12(CCC(CC1)C2)* 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 125000003367 polycyclic group Chemical group 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920000193 polymethacrylate Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 235000011118 potassium hydroxide Nutrition 0.000 description 1
- 239000001965 potato dextrose agar Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- 229940095574 propionic acid Drugs 0.000 description 1
- 229940107700 pyruvic acid Drugs 0.000 description 1
- 125000001453 quaternary ammonium group Chemical group 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229960004889 salicylic acid Drugs 0.000 description 1
- 229930195734 saturated hydrocarbon Natural products 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 239000003352 sequestering agent Substances 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 229960004274 stearic acid Drugs 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 238000010558 suspension polymerization method Methods 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- TUNFSRHWOTWDNC-HKGQFRNVSA-N tetradecanoic acid Chemical compound CCCCCCCCCCCCC[14C](O)=O TUNFSRHWOTWDNC-HKGQFRNVSA-N 0.000 description 1
- QLNOVKKVHFRGMA-UHFFFAOYSA-N trimethoxy(propyl)silane Chemical group [CH2]CC[Si](OC)(OC)OC QLNOVKKVHFRGMA-UHFFFAOYSA-N 0.000 description 1
- 229910052722 tritium Inorganic materials 0.000 description 1
- 229910001930 tungsten oxide Inorganic materials 0.000 description 1
- 229940005605 valeric acid Drugs 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Images
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
-
- 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
- B24B37/005—Control means for lapping machines or devices
-
- 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
-
- 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
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/006—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the speed
-
- 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
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/16—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the load
-
- 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]
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Description
[式1]
ここで、
Xは、LPC測定による直径の大きさが1μm以上の粒子の個数であり、
Yは、LPC測定による直径の大きさが0.7μm以上の粒子の個数であり、
Pは、半導体工程用研磨組成物の溶媒100重量部に対する研磨粒子の重量部であり、
Aは、半導体工程用研磨組成物の溶媒100重量部に対する界面活性剤の重量部である。
Xは、LPC測定による直径の大きさが1μm以上の粒子の個数であり、
Yは、LPC測定による直径の大きさが0.7μm以上の粒子の個数であり、
Pは、半導体工程用研磨組成物の溶媒100重量部に対する研磨粒子の重量部であり、
Aは、半導体工程用研磨組成物の溶媒100重量部に対する界面活性剤の重量部である。
*は、研磨粒子の表面に結合する部分を意味し、R1およびR2は、互いに同一または異なり、それぞれ独立して、水素、置換もしくは非置換の炭素数1~10のアルキル基、置換もしくは非置換の炭素数3~10のシクロアルキル基、置換もしくは非置換の炭素数2~10のアルケニル基、および置換もしくは非置換の炭素数2~10のアルキニル基からなる群より選択され、L1は、置換もしくは非置換の炭素数1~10のアルキレン基、置換もしくは非置換の炭素数2~10のアルケニレン基、置換もしくは非置換の炭素数2~10のアルキニレン基、および置換もしくは非置換の炭素数3~10のシクロアルキレン基からなる群より選択される。
Xは、LPC測定による直径の大きさが1μm以上の粒子の個数であり、
Yは、LPC測定による直径の大きさが0.7μm以上の粒子の個数であり、
Pは、半導体工程用研磨組成物の全体重量に対する研磨粒子の重量部であり、
Aは、半導体工程用研磨組成物の全体重量に対する界面活性剤の重量部である。
研磨粒子としてコロイダルシリカを使用した。前記コロイダルシリカは、表面改質剤として3-アミノプロピルトリエトキシシランを反応させて、表面にアミノシラン化合物が結合されるように製造した。前記コロイダルシリカおよび表面改質剤は、1:0.02の重量比率で混合して反応させた。
分散安定性評価
実施例および比較例に記された研磨組成物は、空気循環式オーブン(oven)を用いて各サンプルを60度の条件で保管した。60度の温度条件で1時間保管時、常温保管1ヶ月と類似の劣化性能を期待できるため、これを用いて最大12時間保管を進行させた。
各サンプルを100mlずつ用意し、24時間停止状態で熟成した。熟成されたサンプルは超純水で1:30(サンプル:超純水)の重量比率で希釈した。サンプルの測定前に、装置のline全体を超純水で洗浄した。下記の装置および条件で、希釈されたサンプルを5回以上測定進行させて平均値を計算した。
希釈液のflow rate:15ml/min
チャネル数:32
Light Extinction collection time:60秒
初期濃度:4000個/ml
Xは、LPC測定による直径の大きさが1μm以上の粒子の個数であり、
Yは、LPC測定による直径の大きさが0.7μm以上の粒子の個数であり、
Pは、半導体工程用研磨組成物の溶媒100重量部に対する研磨粒子の重量部であり、
Aは、半導体工程用研磨組成物の溶媒100重量部に対する界面活性剤の重量部である。
(1)研磨評価
厚さが約5,000Åのタングステンウエハ、厚さが約20,000Åのシリコン酸化膜ウエハに対する研磨評価を進行させた。具体的には、60秒間、圧力2.2psi、キャリア速度103rpm、プラテン速度57rpm、スラリー流速300ml/minの条件で研磨を行った。
CMP評価と同一の条件で研磨を進行させた後、自ら製造したクリーニングケミカル(cleaning chemical)溶液を用いて、ブラシ(Brush)の回転速度500rpm、60s 2000cc/minのケミカル噴射条件でクリーニング工程を行った。クリーニング工程が完了したタングステンおよびシリコン酸化膜ウエハは、ウエハフープ(foup)に密閉された状態で、SKC社保有のAIT-XP+装置を用いて総欠陥数(total defect)を測定した。
微生物発生の有無の確認
各サンプルを滅菌処理したpotato dextrose agar培地に1gの濃度で処理した後、20℃で14日間培養した。各サンプルを滅菌処理したtrypicase soy agar培地に1gの濃度で処理した後、20℃で14日間培養した。図1のようにカビおよび細菌が検出されない場合にはXと表示し、図2のようにカビおよび細菌が検出された場合にはOと表示した。
120:定盤
130:半導体基板
140:ノズル
150:研磨スラリー
160:研磨ヘッド
170:コンディショナ
Claims (10)
- 前記研磨粒子は、粒子表面に結合された官能基を含み、
前記官能基は、末端アミン基を含む、
請求項1に記載の半導体工程用研磨組成物。 - 前記粒子表面に結合された官能基は、下記化学式1の構造を含む、
請求項1に記載の半導体工程用研磨組成物:
*は、研磨粒子の表面に結合される部分を意味し、
R1およびR2は、互いに同一または異なり、それぞれ独立して、水素、置換もしくは非置換の炭素数1~10のアルキル基、置換もしくは非置換の炭素数3~10のシクロアルキル基、置換もしくは非置換の炭素数2~10のアルケニル基、および置換もしくは非置換の炭素数2~10のアルキニル基からなる群より選択され、
L1は、置換もしくは非置換の炭素数1~10のアルキレン基、置換もしくは非置換の炭素数2~10のアルケニレン基、置換もしくは非置換の炭素数2~10のアルキニレン基、および置換もしくは非置換の炭素数3~10のシクロアルキレン基からなる群より選択される。 - 前記研磨粒子は、金属酸化物、有機粒子、有機-無機複合粒子、およびこれらの混合からなる群より選択される、
請求項1に記載の半導体工程用研磨組成物。 - 前記研磨組成物は、6ヶ月以上保管後にも、D50の粒度分布値の変化が5%未満に維持される、
請求項1に記載の半導体工程用研磨組成物。 - 前記研磨組成物は、キレーターを追加的に含む、
請求項1に記載の半導体工程用研磨組成物。 - 前記研磨組成物は、pH調整剤を追加的に含む、
請求項1に記載の半導体工程用研磨組成物。 - 1)研磨層を含む研磨パッドを提供するステップと、
2)前記研磨パッドに半導体工程用研磨組成物を供給するステップと、
3)前記研磨層の研磨面に研磨対象の被研磨面が当接するように相対回転させながら前記研磨対象を研磨させるステップと、を含み、
前記研磨組成物100mlを超純水と1:30の重量比で混合して希釈し、
前記希釈された研磨組成物は、LPC(Large particle counter)測定による下記式1の値が0.01~0.14である
半導体素子の製造方法:
[式1]
ここで、
Xは、LPC測定による直径の大きさが1μm以上の粒子の個数であり、
Yは、LPC測定による直径の大きさが0.7μm以上の粒子の個数であり、
Pは、半導体工程用研磨組成物の溶媒100重量部に対する研磨粒子の重量部であり、
Aは、半導体工程用研磨組成物の溶媒100重量部に対する界面活性剤の重量部である。 - 前記研磨対象が厚さが5,000Åのタングステンウエハであり、前記タングステンウエハを60秒間、圧力2.2psi、キャリア速度は103rpm、プラテン速度は57rpm、前記半導体工程用研磨組成物を300ml/minの流速で供給する条件で研磨を行い、
前記研磨工程でのタングステン膜に対する研磨率が30~100Å/minである、
請求項8に記載の半導体素子の製造方法。 - 前記研磨対象が厚さが20,000Åのシリコン酸化膜ウエハであり、前記シリコン酸化膜ウエハを60秒間、圧力2.2psi、キャリア速度は103rpm、プラテン速度は57rpm、前記半導体工程用研磨組成物を300ml/minの流速で供給する条件で研磨を行い、
前記研磨工程でのシリコン酸化膜に対する研磨率が1,150~1,650Å/minである、
請求項8に記載の半導体素子の製造方法。
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