JP6538701B2 - 窒化チタン及びチタン/窒化チタン除去の抑制に関するcmp方法 - Google Patents
窒化チタン及びチタン/窒化チタン除去の抑制に関するcmp方法 Download PDFInfo
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- JP6538701B2 JP6538701B2 JP2016550260A JP2016550260A JP6538701B2 JP 6538701 B2 JP6538701 B2 JP 6538701B2 JP 2016550260 A JP2016550260 A JP 2016550260A JP 2016550260 A JP2016550260 A JP 2016550260A JP 6538701 B2 JP6538701 B2 JP 6538701B2
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- surfactant
- cmp
- tin
- polishing
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Images
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
- H01L21/31—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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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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- 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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- 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
- H01L21/31058—After-treatment of organic layers
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Description
本例は、TiN除去速度抑制に対する異なる界面活性剤の効果を示す。
本例は、種々の界面活性剤を含むCMP組成物のTiN RRに対する酸化剤としての第二鉄イオンの効果を示す。
本例は、ドデシルベンゼンスルホン酸(DBS)界面活性剤を含む、及び含まないコロイドシリカ研削材を含むCMP組成物のTiN RR抑制に対する研削材固体濃度の効果を示す。
本例は、ドデシルベンゼンスルホン酸(DBS)界面活性剤を含む、及び含まないコロイドシリカ研削材を含むCMP組成物のTiN RR抑制に対するpHの効果を示す。
本例は、ドデシルベンゼンスルホン酸(DBS)界面活性剤を含むCMP組成物、及び含まないCMP組成物のTiN RR抑制に対する異なる研削材料の効果を示す。
本開示は以下も包含する。
[1] 窒化チタン(TiN)又はチタン/窒化チタン(Ti/TiN)バリア層を含む基材を研磨する化学機械研磨(CMP)方法であって、方法が、基材と、液体キャリア中に懸濁された粒状研削材を含む酸性CMP組成物とを接触させることを含み、液体キャリアが、アニオン性界面活性剤、カチオン性界面活性剤、ノニオン性界面活性剤、及びこれらの組み合わせからなる群から選択される界面活性剤を含む、方法。
[2] 粒状研削材が、コロイドシリカを含む、上記態様1に記載の方法。
[3] 粒状研削材が、アルミナを含む、上記態様1に記載の方法。
[4] 粒状研削材が、コロイドシリカとアルミナとの組み合わせを含む、上記態様1に記載の方法。
[5] 粒状研削材が、0.001〜10質量パーセント(質量%)の濃度にてCMP組成物中に存在する、上記態様1に記載の方法。
[6] 界面活性剤が、10〜50000パーツ‐パー‐ミリオン(ppm)の範囲の濃度にてCMP組成物中に存在する、上記態様1に記載の方法。
[7] 界面活性剤が、アルキンジオールノニオン性界面活性剤を含む、上記態様1に記載の方法。
[8] 界面活性剤が、スルホネートアニオン性界面活性剤を含む、上記態様1に記載の方法。
[9] アニオン性界面活性剤が、アルキルアリールスルホネートを含む、上記態様8に記載の方法。
[10] アルキルアリールスルホネートが、アルキルベンゼンスルホネートを含む、上記態様9に記載の方法。
[11] アルキルベンゼンスルホネートが、ドデシルベンゼンスルホネートを含む、上記態様10に記載の方法。
[12] アニオン性界面活性剤が、モノアルキルスルホスクシネート、ジアルキルスルホスクシネート、又はこれらの組み合わせを含む、上記態様8に記載の方法。
[13] 界面活性剤が、スルホネート界面活性剤、サルフェート界面活性剤、ホスホネート界面活性剤、及びホスフェート界面活性剤からなる群から選択される少なくとも1種のアニオン性界面活性剤を含む、上記態様1に記載の方法。
[14] CMP組成物のpHが、2〜7の範囲である、上記態様1に記載の方法。
[15] CMP組成物が、酸化剤をさらに含む、上記態様1に記載の方法。
[16] 酸化剤が、過酸化水素を含む、上記態様15に記載の方法。
[17] 過酸化水素が、0.01〜5質量%の範囲の濃度にてCMP組成物中に存在する、上記態様16に記載の方法。
[18] 摩耗させることが、CMP研磨装置における研磨パッドと連動して達成される、上記態様1に記載の方法。
[19] CMP組成物が、2〜7の範囲のpHにおいて、水性キャリア中に0.001〜10質量%の研削材と、10〜50000ppmのスルホネート界面活性剤と、0.01〜5質量%の過酸化水素とを含む、上記態様1に記載の方法。
[20] スルホネート界面活性剤が、アルキルベンゼンスルホネートを含む、上記態様19に記載の方法。
[21] アルキルベンゼンスルホネートが、ドデシルベンゼンスルホネートを含む、上記態様20に記載の方法。
[22] スルホネート界面活性剤が、モノアルキルスルホスクシネート、ジアルキルスルホスクシネート、又はこれらの組み合わせを含む、上記態様19に記載の方法。
[23] CMP組成物が、2〜7の範囲のpHにおいて、水性キャリア中に0.001〜10質量%の研削材と、10〜50000ppmのノニオン性界面活性剤と、0〜5質量%の過酸化水素とを含む、上記態様1に記載の方法。
[24] ノニオン性界面活性剤が、アルキンジオールを含む、上記態様23に記載の方法。
Claims (8)
- 窒化チタン(TiN)又はチタン/窒化チタン(Ti/TiN)バリア層上に堆積した金属を含む基材を研磨する化学機械研磨(CMP)方法であって、方法が、基材と、液体キャリア中に懸濁された粒状研削材を含む酸性CMP組成物とを接触させることを含み、該粒状研削材は、アルミナを含みかつ平均粒子サイズ10〜150nmを有し、該液体キャリアは、界面活性剤を含み、該界面活性剤は、(C10−C14)アルキルベンゼンスルホネートとエトキシル化(C6−C12)アルコールとの混合物を含み、該界面活性剤は、TiN及びTi/TiNが研磨される速度を抑制し、該組成物のpHは、2〜5の範囲である、方法。
- 粒状研削材が、0.001〜10質量パーセント(質量%)の濃度にてCMP組成物中に存在する、請求項1に記載の方法。
- 界面活性剤が、10〜50000パーツ‐パー‐ミリオン(ppm)の範囲の濃度にてCMP組成物中に存在する、請求項1に記載の方法。
- CMP組成物が、酸化剤をさらに含む、請求項1に記載の方法。
- 酸化剤が、過酸化水素を含む、請求項4に記載の方法。
- 過酸化水素が、0.01〜5質量%の範囲の濃度にてCMP組成物中に存在する、請求項5に記載の方法。
- 摩耗させることが、CMP研磨装置における研磨パッドと連動して達成される、請求項1に記載の方法。
- CMP組成物が、0.001〜10質量%の研削材と、10〜50000ppmのスルホネート界面活性剤と、0.01〜5質量%の過酸化水素とを含む、請求項1に記載の方法。
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