JP5038199B2 - 酸化物cmpのための組成物 - Google Patents
酸化物cmpのための組成物 Download PDFInfo
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- JP5038199B2 JP5038199B2 JP2008066541A JP2008066541A JP5038199B2 JP 5038199 B2 JP5038199 B2 JP 5038199B2 JP 2008066541 A JP2008066541 A JP 2008066541A JP 2008066541 A JP2008066541 A JP 2008066541A JP 5038199 B2 JP5038199 B2 JP 5038199B2
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- Prior art keywords
- chemical mechanical
- mechanical polishing
- polishing slurry
- cerium
- abrasive
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- 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
-
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Materials Engineering (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Description
以下の実施例は、本発明の好ましい実施態様、並びに本発明の組成物を用いるための好ましい方法を説明する。組成物及びスラリーはすべて、下記に略記するようなSTI研磨プロトコールに用いられた。
微粉砕セリア処方物
ブランケット二酸化ケイ素及び窒化物ウェハを研磨するその能力を評価するために、微粉砕セリアスラリーを調製した。約2〜4μmの粒子サイズを有するRhodite等級400HSセリアをUniversal Photonics,Hicksville,New Yorkから購入して、アジテータービーズミルを用いて150nmの一次中間値粒子サイズに微粉砕した。微粉砕化は、その結果生じるpH約7.5〜8.5のスラリーが微粉砕後に20〜30%の固体を含有するような条件下で成し遂げられた。
沈降セリア窒化物処方物
沈降セリア粒子、硝酸、酢酸を含有する硝酸塩安定化セリアスラリー(pH=1.8及び固体20%)は、Nyacol Products (Ashland,MA)から購入した。水酸化アンモニウムを添加することにより、スラリーのpHを約4.2〜6.8に調整した。実施例1に記載した方法にしたがって、スラリーを用いて基材を研磨した。研磨結果を表2に報告する。
沈降セリア酢酸塩処方物
可溶性Ce3+及びCe4+及び酢酸を含むコロイド酢酸セリウムスラリー(pH=1.8及び固体20%)は、Nyacol Products(Ashland,MA)から購入した。スラリーのpHを約4.58に調整し、固体含量を15%にした。実施例1に記載した方法にしたがって、スラリーを基材に適用した。結果は、11.1の酸化物対窒化物選択率に関して、酸化物層除去速度117Å/分及び窒化物層除去速度10.5Å/分であることを示した。
破砕/沈降セリア処方物
実施例2に記載したように製造した種々の重量%量の微粉砕セリアと、Nyacol Products(Ashland,MA)から購入した沈降セリアから成るセリアスラリーを、表3に示したように処方した。実施例1に記載した方法にしたがって、スラリーを用いて基材を研磨した。研磨結果を下記の表3に記載する。
微粉砕セリアを用いた化学的処方物
Cabot Corporationにより製造され、CAB−O−SILの商品名で販売されているヒュームドシリカ粒子L−90、硝酸セリウムアンモニウム、種々のパーセンテージの酢酸及び脱イオン水から成るスラリーを、表4に示したように処方した。添加剤の含入後、全スラリーをpH=4に調整した。実施例1に記載した方法にしたがって、スラリーを基材に適用した。
シリカを用いる化学処方物−pH試験
4重量%のCAB−O−SIL(商標)L−90ヒュームドシリカ、1.8重量%の硝酸セリウムアンモニウム及び0.6重量%の種々のパーセンテージの酢酸から成るスラリーを、表5に示したように処方した。スラリーのpHは、4.0〜5.0の間であった。実施例1に記載した方法にしたがって、スラリーを基材に適用した。
1.8重量%の硝酸セリウムアンモニウム、0.8重量%の酢酸及び脱イオン水から成る組成物を用いて、実施例1の方法にしたがって、PETEOS及び窒化ケイ素ウェハを研磨した。スラリーのpHは4.5に調整した。組成物は690Å/分でPETEOSを、23Å/分で窒化ケイ素を研磨し、PETEOS選択率は30であった。
適量の(1)Nyacol Products(Ashland,MA)製で、実施例4に記載した20重量%のコロイド酢酸セリウム溶液;(2)Cabot Corp.製で、CAB−O−SILの商品名で販売されているL−90ヒュームドシリカ;及び(3)脱イオン水を組み合わせることにより、4.0重量%のセリウム及び4.0重量%のシリカから成るpH4.5のCMPスラリーを調製した。水酸化アンモニウムを用いてスラリーのpHを4.5に調整した。スラリーは0.15重量%の過硫酸アンモニウムを含有していた。
本実施例は、酸化剤を用いない場合と用いた場合とで、本発明の組成物の研磨効力を評価した。Ce4+イオンを含有する4.0重量%のコロイドセリア及び4.0重量%のシリカから成り、pHが4.5であるスラリーを、実施例9に記載した方法にしたがって処方した。0.15重量%の過硫酸アンモニウムを添加した場合と添加しなかった場合とで、実施例2の方法にしたがってスラリーを試験した。試験結果を下記の表7に報告する。
Claims (22)
- Ce4+イオンを含む、0.05重量%〜10.0重量%の可溶性セリウム化合物(セリアを除く);
Ce4+より大きい酸化電位を有する、0.05重量%〜5.0重量%の酸化剤;及び
1〜25重量%の少なくとも1種の研磨材
を含んでなり、かつ3〜11のpHを有する二酸化ケイ素層及び窒化ケイ素層を有する基材を研磨するための水性化学機械的研磨スラリー。 - 前記可溶性セリウム化合物が、水酸化セリウム(Ce(OH)4)の水和及び非水和塩、硫酸アンモニウムセリウム{(NH4)2SO4Ce2(SO4)3}、酢酸セリウム{Ce(O2CH3)3}、硫酸セリウム{Ce(SO4)2}、臭素酸セリウム{Ce(BrO3)3・9H2O}、臭化セリウム{CeBr3}、炭酸セリウム{Ce(CO3)2}、塩化セリウム{CeCl3}、シュウ酸セリウム{Ce(C2O4)3}、硝酸セリウム{Ce(NO3)3(OH)・6H2O}、及びそれらの組合せからなる群より選択される、請求項1に記載の水性化学機械的研磨スラリー。
- pHが3.5〜6.0である、請求項1又は2に記載の水性化学機械的研磨スラリー。
- pHが3.8〜5.5である、請求項1に記載の水性化学機械的研磨スラリー。
- 0.05〜10.0重量%の少なくとも1種のカルボン酸又はその塩を含む、請求項1〜4のいずれか一項に記載の水性化学機械的研磨スラリー。
- 前記カルボン酸又はその塩が、一官能酸、二官能酸及びそれらの塩から選択される、請求項5に記載の水性化学機械的研磨スラリー。
- 前記カルボン酸が酢酸である、請求項6に記載の水性化学機械的研磨スラリー。
- 前記酸化剤が過硫酸アンモニウムである、請求項1〜7のいずれか一項に記載の水性化学機械的研磨スラリー。
- 0.05〜5.0重量%の過硫酸アンモニウムを含む、請求項8に記載の水性化学機械的研磨スラリー。
- 少なくとも1種のキレート剤を含む、請求項1〜9のいずれか一項に記載の水性化学機械的研磨スラリー。
- 0.05〜5.0重量%のキレート剤を含む、請求項10に記載の水性化学機械的研磨スラリー。
- 前記キレート剤が、EDTA塩、クエン酸、及びそれらの混合物から選択される、請求項10又は11に記載の水性化学機械的研磨スラリー。
- 2〜25重量%の研磨材を含む、請求項1〜12のいずれか一項に記載の化学機械的研磨スラリー。
- 2〜15重量%の研磨材を含む、請求項13に記載の化学機械的研磨スラリー。
- 前記研磨材が少なくとも1種の金属酸化物である、請求項1〜14のいずれか一項に記載の化学機械的研磨スラリー。
- 前記金属酸化物の研磨材が、アルミナ、チタニア、ジルコニア、ゲルマニア、シリカ、セリア、並びにそれらの混合物及び化学的混合物からなる群より選択される、請求項15に記載の化学機械的研磨スラリー。
- 前記金属酸化物の研磨材が、シリカである、請求項16に記載の化学機械的研磨スラリー。
- 前記研磨材が、アルミナ、チタニア、ジルコニア、ゲルマニア、シリカ及びセリアから選択される少なくとも2つの構成酸化物の物理的混合物である、請求項15に記載の化学機械的研磨スラリー。
- 0.05〜5.0重量%の過硫酸アンモニウム、
0.05〜5.0重量%の少なくとも1種のキレート剤、
0.5〜10重量%の可溶性セリウム化合物、及び
1〜25重量%の金属酸化物研磨材
を含む、請求項1に記載の水性化学機械的研磨スラリー。 - 前記キレート剤が、EDTA塩、クエン酸、及びそれらの混合物から選択される、請求項19に記載の水性化学機械的研磨スラリー。
- 請求項1〜20のいずれか一項に記載の前記化学機械的研磨スラリーを基材に適用し;そして
パッドを前記基板と接触させ、そして前記パッドを前記基材に関して動かすことによって、二酸化ケイ素層の少なくとも一部分を前記基材から除去すること;
を含む、二酸化ケイ素層及び窒化ケイ素層を有する層状基材から、二酸化ケイ素層の少なくとも一部分を除去する方法。 - 前記窒化ケイ素層の除去速度よりも少なくとも5倍大きい速度で、前記二酸化ケイ素層が前記基材から除去される、請求項21に記載の方法。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/774,488 US5759917A (en) | 1996-12-30 | 1996-12-30 | Composition for oxide CMP |
| US08/774,488 | 1996-12-30 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP53013898A Division JP2001507739A (ja) | 1996-12-30 | 1997-12-19 | 酸化物cmpのための組成物 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2008199043A JP2008199043A (ja) | 2008-08-28 |
| JP5038199B2 true JP5038199B2 (ja) | 2012-10-03 |
Family
ID=25101406
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP53013898A Withdrawn JP2001507739A (ja) | 1996-12-30 | 1997-12-19 | 酸化物cmpのための組成物 |
| JP2008066541A Expired - Lifetime JP5038199B2 (ja) | 1996-12-30 | 2008-03-14 | 酸化物cmpのための組成物 |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP53013898A Withdrawn JP2001507739A (ja) | 1996-12-30 | 1997-12-19 | 酸化物cmpのための組成物 |
Country Status (11)
| Country | Link |
|---|---|
| US (3) | US5759917A (ja) |
| EP (1) | EP0963419B1 (ja) |
| JP (2) | JP2001507739A (ja) |
| KR (1) | KR20000069823A (ja) |
| CN (1) | CN1168794C (ja) |
| AT (1) | ATE264378T1 (ja) |
| AU (1) | AU5532898A (ja) |
| DE (1) | DE69728691T2 (ja) |
| IL (1) | IL130720A0 (ja) |
| TW (1) | TW505690B (ja) |
| WO (1) | WO1998029515A1 (ja) |
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-
1996
- 1996-12-30 US US08/774,488 patent/US5759917A/en not_active Expired - Lifetime
-
1997
- 1997-12-19 EP EP97951772A patent/EP0963419B1/en not_active Expired - Lifetime
- 1997-12-19 AT AT97951772T patent/ATE264378T1/de not_active IP Right Cessation
- 1997-12-19 KR KR1019997005985A patent/KR20000069823A/ko not_active Withdrawn
- 1997-12-19 US US08/994,894 patent/US6689692B1/en not_active Expired - Lifetime
- 1997-12-19 WO PCT/US1997/023627 patent/WO1998029515A1/en not_active Ceased
- 1997-12-19 AU AU55328/98A patent/AU5532898A/en not_active Abandoned
- 1997-12-19 IL IL13072097A patent/IL130720A0/xx unknown
- 1997-12-19 DE DE69728691T patent/DE69728691T2/de not_active Expired - Lifetime
- 1997-12-19 CN CNB971819726A patent/CN1168794C/zh not_active Expired - Lifetime
- 1997-12-19 JP JP53013898A patent/JP2001507739A/ja not_active Withdrawn
- 1997-12-30 TW TW086120010A patent/TW505690B/zh not_active IP Right Cessation
-
2003
- 2003-10-27 US US10/694,408 patent/US6984588B2/en not_active Expired - Lifetime
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- 2008-03-14 JP JP2008066541A patent/JP5038199B2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN1168794C (zh) | 2004-09-29 |
| ATE264378T1 (de) | 2004-04-15 |
| US5759917A (en) | 1998-06-02 |
| WO1998029515A1 (en) | 1998-07-09 |
| EP0963419A1 (en) | 1999-12-15 |
| US20040089634A1 (en) | 2004-05-13 |
| AU5532898A (en) | 1998-07-31 |
| KR20000069823A (ko) | 2000-11-25 |
| US6689692B1 (en) | 2004-02-10 |
| US6984588B2 (en) | 2006-01-10 |
| JP2001507739A (ja) | 2001-06-12 |
| EP0963419B1 (en) | 2004-04-14 |
| JP2008199043A (ja) | 2008-08-28 |
| DE69728691T2 (de) | 2004-08-19 |
| IL130720A0 (en) | 2000-06-01 |
| DE69728691D1 (de) | 2004-05-19 |
| CN1248994A (zh) | 2000-03-29 |
| TW505690B (en) | 2002-10-11 |
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