JP6046933B2 - 研磨方法 - Google Patents
研磨方法 Download PDFInfo
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- JP6046933B2 JP6046933B2 JP2012154975A JP2012154975A JP6046933B2 JP 6046933 B2 JP6046933 B2 JP 6046933B2 JP 2012154975 A JP2012154975 A JP 2012154975A JP 2012154975 A JP2012154975 A JP 2012154975A JP 6046933 B2 JP6046933 B2 JP 6046933B2
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- 238000005498 polishing Methods 0.000 title claims description 795
- 238000000034 method Methods 0.000 title claims description 66
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- 235000012431 wafers Nutrition 0.000 claims description 449
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 45
- 238000004140 cleaning Methods 0.000 claims description 40
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- 239000011229 interlayer Substances 0.000 description 28
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 27
- 229910052802 copper Inorganic materials 0.000 description 27
- 239000010949 copper Substances 0.000 description 27
- 238000010586 diagram Methods 0.000 description 21
- 239000013307 optical fiber Substances 0.000 description 18
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- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 9
- 229910052721 tungsten Inorganic materials 0.000 description 9
- 239000010937 tungsten Substances 0.000 description 9
- 229910052581 Si3N4 Inorganic materials 0.000 description 7
- 239000012528 membrane Substances 0.000 description 7
- 230000003287 optical effect Effects 0.000 description 7
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 7
- 229920005591 polysilicon Polymers 0.000 description 7
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- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 7
- 229910004298 SiO 2 Inorganic materials 0.000 description 6
- 230000007423 decrease Effects 0.000 description 6
- 239000012530 fluid Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 239000006061 abrasive grain Substances 0.000 description 3
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- 238000002955 isolation Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
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- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
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- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
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- 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]
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- 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
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- 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
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
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- 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
- B24B49/12—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 involving optical means
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- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
- G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
- G01B7/10—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using magnetic means, e.g. by measuring change of reluctance
- G01B7/105—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using magnetic means, e.g. by measuring change of reluctance for measuring thickness of coating
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- 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
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- 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
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- 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
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Description
図3は、本発明の実施形態に係る研磨方法を実行することができる研磨装置を示す図である。図3に示すように、この研磨装置は、略矩形状のハウジング1を備えており、ハウジング1の内部は隔壁1a,1bによってロード/アンロード部2と研磨部3と洗浄部4とに区画されている。研磨装置は、ウェハ処理動作を制御する動作制御部5を有している。
上記式(2)に従って算出されたスペクトルの変化量は、膜の除去量を示す除去指標値である。
R1I1+L1dI1/dt+MdI2/dt=E (3)
R2I2+L2dI2/dt+MdI1/dt=0 (4)
ここで、Mは相互インダクタンスであり、R1は渦電流式膜厚センサ60のコイル61を含むセンサ側回路の等価抵抗であり、L1はコイル61を含むセンサ側回路の自己インダクタンスである。R2は渦電流損に相当する等価抵抗であり、L2は渦電流が流れる導電膜の自己インダクタンスである。
(R1+jωL1)I1+jωMI2=E (5)
(R2+jωL2)I2+jωMI1=0 (6)
これら式(5),(6)から、次の式が導かれる。
I1=E(R2+jωL2)/{(R1+jωL1)(R2+jωL2)+ω2M2}
=E/{(R1+jωL1)+ω2M2/(R2+jωL2)} (7)
Φ=E/I1={R1+ω2M2R2/(R2 2+ω2L2 2)}
+jω{L1−ω2L2M2/(R2 2+ω2L2 2)} (8)
ここで、Φの実部(抵抗成分)、虚部(誘導リアクタンス成分)をそれぞれX,Yとおくと、上記式(8)は、次のようになる。
Φ=X+jωY (9)
M=k(L1L2)1/2 (10)
2 ロード/アンロード部
3 研磨部
3A,3B,3C,3D 研磨ユニット
4 洗浄部
5 動作制御部
6 第1リニアトランスポータ
7 第2リニアトランスポータ
10 研磨パッド
11 リフタ
12 スイングトランスポータ
16 トップリングシャフト
17 連結手段
18 トップリングモータ
19 テーブルモータ
20 フロントロード部
21 走行機構
22 搬送ロボット
30A,30B,30C,30D 研磨テーブル
31A,31B,31C,31D トップリング
32A,32B,32C,32D 研磨液供給機構
33A,33B,33C,33D ドレッサ
34A,34B,34C,34D アトマイザ
40 光学式膜厚センサ
42 投光部
43 受光部(光ファイバー)
44 分光器
47 光源
48 光ファイバー
50A 第1の孔
50B 第2の孔
51 通孔
53 液体供給路
54 液体排出路
55 液体供給源
56 自由継手
57 トップリング本体
58 リテーナリング
60 渦電流式膜厚センサ
61 コイル
62 メンブレン
63 チャッキングプレート
64 圧力調整部
70 トルク電流計測器
72 仮置き台
73 一次洗浄器
74 二次洗浄器
75 乾燥器
77 第1搬送ロボット
78 第2搬送ロボット
79 搬送ロボット
80 ウエット型膜厚測定器
81 水槽
82 把持部
83 サポートアーム
84 光学式膜厚測定ヘッド
85 オリエンテーション検出器
87 測定台
90 透明窓
92 水平移動機構
Claims (15)
- 膜が形成されたウェハを研磨する方法であって、
(i)研磨パッドを支持するための回転可能な研磨テーブル、ウェハを保持し前記研磨パッドに押圧するための回転可能なトップリング、研磨液を前記研磨パッドの表面に供給する研磨液供給機構、および前記研磨テーブル内に埋設され、前記ウェハを研磨している間に前記ウェハの膜厚に従って変化する膜厚信号を取得する膜厚センサとを含む研磨部と、(ii)研磨されたウェハを洗浄および乾燥する洗浄部と、(iii)研磨されたウェハの膜の厚さをウェハ上の複数の測定点で測定することができる光学式膜厚測定ヘッドを有する膜厚測定器と、を備えた研磨装置を用意し、
前記トップリングでウェハを保持し、
前記研磨パッドとともに前記研磨テーブルを回転させながら、前記ウェハとともに前記トップリングを回転させ、
前記ウェハを前記研磨パッドに対して押し付けることにより前記ウェハの膜を前記研磨部で研磨する研磨工程を行い、
前記ウェハの研磨中、前記研磨テーブルとともに回転する前記膜厚センサで、前記トップリングとともに回転している前記ウェハの膜厚信号を取得し、
前記膜厚信号から生成された膜厚指標値が第1の目標値に達したときに前記ウェハの研磨を停止し、
前記研磨されたウェハを洗浄および乾燥する前に、該ウェハを前記膜厚測定器に搬送し、
研磨された前記膜の厚さを前記膜厚測定器により複数の測定点で測定し、
測定された前記膜の厚さと第2の目標値とを比較し、
前記膜の厚さが前記第2の目標値に達していなければ、前記ウェハを前記洗浄部で洗浄および乾燥する前に該ウェハを前記研磨部で再研磨する再研磨工程を行い、
現在の膜厚指標値と、前記膜厚測定器から得られた現在の膜厚の測定値とに基づいて、前記膜厚センサを較正し、
後続のウェハを研磨し、その間、較正された前記膜厚センサで前記後続のウェハの膜厚信号を取得し、
前記膜厚信号から生成された膜厚指標値が所定の目標値に達したときに前記後続のウェハの研磨を停止することを特徴とする方法。 - 前記膜厚測定器で測定された前記膜の厚さが前記第2の目標値に達するために必要な追加研磨時間を算出する工程をさらに含み、
前記再研磨工程は、前記ウェハを前記研磨部で前記追加研磨時間だけ再研磨する工程であることを特徴とする請求項1に記載の方法。 - 前記研磨工程は、前記膜の厚さが前記第2の目標値に達する前に停止されることを特徴とする請求項1に記載の方法。
- 前記研磨部は複数のトップリングと複数の研磨テーブルを含み、
前記研磨工程および前記再研磨工程は、同一の研磨テーブルに取付けられた研磨パッド上に研磨液を供給しながら、前記ウェハを前記研磨パッドに摺接させる工程であることを特徴とする請求項1に記載の方法。 - 前記研磨部は複数のトップリングと複数の研磨テーブルを含み、
前記再研磨工程は、前記研磨工程で使用された研磨テーブルとは別の研磨テーブルに取付けられた研磨パッド上に研磨液を供給しながら、前記ウェハを前記別の研磨テーブル上の前記研磨パッドに摺接させる工程であることを特徴とする請求項1に記載の方法。 - 前記膜厚測定器で測定された前記膜の厚さが前記第2の目標値に達しているときは、前記ウェハを洗浄し、乾燥させることを特徴とする請求項1に記載の方法。
- 前記再研磨工程を行っているとき、および/または前記膜厚測定器により前記膜の厚さを測定しているときに、後続のウェハに液体を吹き付けることを特徴とする請求項1に記載の方法。
- 前記膜厚測定器は、研磨された前記ウェハが水槽内の純水に浸漬された状態で前記膜の厚さを測定することを特徴とする請求項1に記載の方法。
- 前記膜厚センサは、渦電流式膜厚センサまたは光学式膜厚センサであることを特徴とする請求項1に記載の方法。
- 前記研磨されたウェハはウエット状態のまま前記膜厚測定器に搬送されることを特徴とする請求項1に記載の方法。
- 前記研磨されたウェハは前記トップリングによって搬送機に搬送され、さらに前記搬送機によって前記膜厚測定器に搬送されることを特徴とする請求項1に記載の方法。
- 前記光学式膜厚測定ヘッドは、ウェハと前記光学式膜厚測定ヘッドとの間に液体を介在させた状態で、ウェハの膜の厚さを測定することを特徴とする請求項1に記載の方法。
- 前記研磨部は複数のトップリングと複数の研磨テーブルを含み、
前記再研磨工程のために前記複数の研磨テーブルのいずれかにウェハを搬送するかの判断基準は、現在の膜厚と前記第2の目標値との差が予め定めたレンジ内にあるか否かであることを特徴とする請求項1に記載の方法。 - 前記膜厚測定器で前記膜の厚さを測定する前に、ウェハの周方向の向きを検出することを特徴とする請求項1に記載の方法。
- 膜が形成されたウェハを研磨する方法であって、
前記膜の厚さに従って変化する膜厚信号を膜厚センサで取得しながら前記ウェハを研磨し、
前記膜厚信号から生成された膜厚指標値が所定の値に達したときに前記ウェハの研磨を停止し、
研磨された前記ウェハを膜厚測定器に搬送し、
前記膜厚測定器により前記膜の現在の厚さを測定し、
現在の膜厚指標値と、前記膜厚測定器から得られた現在の膜厚の測定値とに基づいて、前記膜厚センサを較正し、
後続のウェハを研磨し、その間、前記較正された膜厚センサで前記後続のウェハの膜厚信号を取得し、
前記膜厚信号から生成された膜厚指標値が所定の目標値に達したときに前記後続のウェハの研磨を停止することを特徴とする方法。
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US13/938,018 US8951813B2 (en) | 2012-07-10 | 2013-07-09 | Method of polishing a substrate having a film on a surface of the substrate for semiconductor manufacturing |
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US9997420B2 (en) * | 2013-12-27 | 2018-06-12 | Taiwan Semiconductor Manufacturing Company Limited | Method and/or system for chemical mechanical planarization (CMP) |
JP6293519B2 (ja) * | 2014-03-05 | 2018-03-14 | 株式会社荏原製作所 | 研磨装置および研磨方法 |
JP6266493B2 (ja) | 2014-03-20 | 2018-01-24 | 株式会社荏原製作所 | 研磨装置及び研磨方法 |
JP6370084B2 (ja) * | 2014-04-10 | 2018-08-08 | 株式会社荏原製作所 | 基板処理装置 |
JP6454326B2 (ja) * | 2014-04-18 | 2019-01-16 | 株式会社荏原製作所 | 基板処理装置、基板処理システム、および基板処理方法 |
CN106604802B (zh) * | 2014-09-02 | 2019-05-31 | 株式会社荏原制作所 | 终点检测方法、研磨装置及研磨方法 |
JP6321579B2 (ja) * | 2015-06-01 | 2018-05-09 | 株式会社日立国際電気 | 半導体装置の製造方法、基板処理システム、基板処理装置及びプログラム |
JP6566897B2 (ja) * | 2016-03-17 | 2019-08-28 | 東京エレクトロン株式会社 | 制御装置、基板処理システム、基板処理方法及びプログラム |
US11626315B2 (en) * | 2016-11-29 | 2023-04-11 | Taiwan Semiconductor Manufacturing Co., Ltd. | Semiconductor structure and planarization method thereof |
JP7023063B2 (ja) * | 2017-08-08 | 2022-02-21 | 株式会社荏原製作所 | 基板研磨装置及び方法 |
JP6902452B2 (ja) * | 2017-10-19 | 2021-07-14 | 株式会社荏原製作所 | 研磨装置 |
JP7081919B2 (ja) * | 2017-12-26 | 2022-06-07 | 株式会社ディスコ | 加工装置 |
JP7316785B2 (ja) | 2018-12-26 | 2023-07-28 | 株式会社荏原製作所 | 光学式膜厚測定システムの洗浄方法 |
US11623320B2 (en) * | 2019-08-21 | 2023-04-11 | Applied Materials, Inc. | Polishing head with membrane position control |
JP2021112797A (ja) * | 2020-01-17 | 2021-08-05 | 株式会社荏原製作所 | 研磨ヘッドシステムおよび研磨装置 |
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