JP4488234B2 - ハードマスク用塗布型窒化膜形成組成物 - Google Patents
ハードマスク用塗布型窒化膜形成組成物 Download PDFInfo
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- JP4488234B2 JP4488234B2 JP2005516606A JP2005516606A JP4488234B2 JP 4488234 B2 JP4488234 B2 JP 4488234B2 JP 2005516606 A JP2005516606 A JP 2005516606A JP 2005516606 A JP2005516606 A JP 2005516606A JP 4488234 B2 JP4488234 B2 JP 4488234B2
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- underlayer film
- oxynitride
- nitride
- photoresist
- forming composition
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
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- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02225—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer
- H01L21/0226—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process
- H01L21/02282—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process liquid deposition, e.g. spin-coating, sol-gel techniques, spray coating
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/02—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/02—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition
- C23C18/06—Coating on selected surface areas, e.g. using masks
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/02—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition
- C23C18/12—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material
- C23C18/1204—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material inorganic material, e.g. non-oxide and non-metallic such as sulfides, nitrides based compounds
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/02—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition
- C23C18/12—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material
- C23C18/125—Process of deposition of the inorganic material
- C23C18/1295—Process of deposition of the inorganic material with after-treatment of the deposited inorganic material
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- C—CHEMISTRY; METALLURGY
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
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- G—PHYSICS
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- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/09—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers
- G03F7/11—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having cover layers or intermediate layers, e.g. subbing layers
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
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- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
- H01L21/02112—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer
- H01L21/02123—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon
- H01L21/02126—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material containing Si, O, and at least one of H, N, C, F, or other non-metal elements, e.g. SiOC, SiOC:H or SiONC
- H01L21/0214—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material containing Si, O, and at least one of H, N, C, F, or other non-metal elements, e.g. SiOC, SiOC:H or SiONC the material being a silicon oxynitride, e.g. SiON or SiON:H
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- H01—ELECTRIC ELEMENTS
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
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- H01L21/02123—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon
- H01L21/0217—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material being a silicon nitride not containing oxygen, e.g. SixNy or SixByNz
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- H01L21/02104—Forming layers
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- H01L21/02172—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides
- H01L21/02175—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides characterised by the metal
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
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- H01L21/02172—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides
- H01L21/02175—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides characterised by the metal
- H01L21/02181—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides characterised by the metal the material containing hafnium, e.g. HfO2
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- 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
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- H01L21/02172—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
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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
- H01L21/027—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34
- H01L21/0271—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising organic layers
- H01L21/0273—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising organic layers characterised by the treatment of photoresist layers
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- 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
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- 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
- H01L21/314—Inorganic layers
- H01L21/318—Inorganic layers composed of nitrides
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Description
また、本発明は、半導体装置の製造に用いられるフォトレジストパターンの形成において使用される金属窒化物粒子を含む下層膜を形成するための下層膜形成組成物に関する。また、該下層膜形成組成物を用いた金属窒化物粒子を含む下層膜の形成方法、及び該下層膜形成組成物より形成される金属窒化物粒子を含む下層膜に関する。
そして、このような加工法において、半導体基板とフォトレジストとの間に、反射防止膜や平坦化膜等の有機物質よりなる下層膜、有機下層膜が形成されることがある。この場合、フォトレジストパターンを保護膜として、まず、有機下層膜をエッチングにより除去し、その後、半導体基板の加工が行なわれる。有機下層膜のエッチングは一般にドライエッチングにより行なわれるが、この際、有機下層膜だけでなくフォトレジストもエッチングされ、その膜厚が減少するという問題がある。そのため、有機下層膜としてはドライエッチングによる除去の速度の大きなものが用いられる傾向にある。しかし、フォトレジストも有機下層膜と同様に有機物質で構成されているため、フォトレジストの膜厚の減少を抑えることは困難である。
近年、加工寸法の微細化の進展に伴い、薄膜のフォトレジストの使用が検討されるようになってきている。これは、膜厚を変えることなくフォトレジストパターンの寸法を小さくした場合、フォトレジストパターンのアスペクト比(高さ/幅)が大きくなり、フォトレジストパターンの倒壊などの発生が考えられるからである。また、フォトレジストはその膜厚が薄いほど解像性が向上する。このようなことから、フォトレジストを薄膜で使用することが望まれている。しかし、フォトレジストと有機下層膜とを使用した場合、上述のように、有機下層膜除去時のフォトレジスト膜厚の減少という問題がある。そのため、フォトレジストを薄膜にした場合、半導体基板加工のための保護膜(フォトレジストと有機下層膜よりなる)としての十分な膜厚を確保できなくなるという問題が生じる。
一方、半導体基板とフォトレジストとの間の下層膜として、ハードマスクとして知られる無機物質からなる膜を使用することが行なわれている。この場合、フォトレジスト(有機物質)とハードマスク(無機物質)では、その構成成分に大きな違いがあるため、それらのドライエッチングによって除去される速度は、ドライエッチングに使用されるガス種に大きく依存する。そして、ガス種を適切に選択することにより、フォトレジストの膜厚の大きな減少を伴うことなく、ハードマスク(下層膜)をドライエッチングによって除去することが可能となる。そのため、フォトレジストとハードマスクとを使用した場合は、フォトレジストが薄膜であっても、半導体基板加工のための保護膜(フォトレジストとハードマスクよりなる)としての十分な膜厚を確保できると考えられている。
従来、ハードマスクはCVD装置、真空蒸着装置、及びスパッタリング装置等を使用して、蒸着法によって形成されていた。これに対し、フォトレジストや有機下層膜は半導体基板上へのスピンコート装置等による塗布及びそれに続く焼成(以下、スピンコート法、という)によって形成されている。スピンコート法は蒸着法に比べ装置等が簡便である。そのため、蒸着法ではなく、スピンコート法によって形成することができるハードマスクが求められている。
ところで、無機物質を含むある種の下層膜が知られている(例えば、特許文献1、特許文献2、特許文献3参照)。
第2観点として、平均粒子径が1〜1000nmである金属窒化物粒子、有機材料、及び有機溶剤を含む、半導体装置の製造に使用される下層膜形成組成物、
第3観点として、前記金属窒化物粒子が、チタン、シリコン、タンタル、タングステン、セリウム、ゲルマニウム、ハフニウム、及びガリウムからなる群から選ばれる少なくとも一種の元素を含む、第1観点または第2観点に記載の下層膜形成組成物、
第4観点として、前記金属窒化物粒子が、チタンナイトライド、チタンオキシナイトライド、シリコンナイトライド、シリコンオキシナイトライド、タンタルナイトライド、タンタルオキシナイトライド、タングステンナイトライド、タングステンオキシナイトライド、セリウムナイトライド、セリウムオキシナイトライド、ゲルマニウムナイトライド、ゲルマニウムオキシナイトライド、ハフニウムナイトライド、ハフニウムオキシナイトライド、セシウムナイトライド、セシウムオキシナイトライド、ガリウムナイトライド、及びガリウムオキシナイトライドからなる群から選ばれる少なくとも一種の金属窒化物の粒子である、第1観点または第2観点に記載の下層膜形成組成物、
第5観点として、前記有機材料が、ポリマー、架橋性化合物及び吸光性化合物からなる群から選ばれる少なくとも一つの成分である第2観点に記載の下層膜形成組成物、
第6観点として、第1観点乃至第5観点のいずれか一つに記載の下層膜形成組成物を半導体基板上に塗布し焼成することによる、半導体装置の製造に用いる下層膜の形成方法、
第7観点として、前記焼成が焼成温度80℃〜300℃、焼成時間0.5〜10分間の条件で行なわれることを特徴とする、第6観点に記載の下層膜の形成方法、
第8観点として、第1観点乃至第5観点のいずれか一つに記載の下層膜形成組成物を半導体基板上に塗布し焼成して下層膜を形成する工程、その下層膜上にフォトレジスト層を形成する工程、下層膜とフォトレジスト層で被覆された半導体基板を露光する工程、露光後に現像する工程、を含む半導体装置の製造に用いるフォトレジストパターンの形成方法、第9観点として、前記露光が248nm、193nmまたは157nmの波長の光により行われる第8観点に記載のフォトレジストパターンの形成方法、である。
本発明により得られる、金属窒化物粒子を含む下層膜により、ドライエッチングプロセス時における半導体下地基板の加工が容易になる。また、本発明により得られる、金属窒化物粒子を含む下層膜を使用することにより、下層膜をドライエッチングによって除去する際のフォトレジストの膜厚の減少量を低減することができる。
本発明の下層膜形成組成物における固形分の割合は、例えば0.1〜70質量%であり、または0.5〜50質量%であり、または1〜40質量%であり、または10〜30質量%である。ここで固形分とは、下層膜形成組成物の全成分から有機溶剤成分を除いたものである。
吸光性化合物の種類、添加量を選択することによって、本発明の下層膜形成組成物より形成される下層膜の屈折率、減衰係数等の特性を調節することが可能である。このような吸光性化合物としては、下層膜の上に設けられるフォトレジスト層中の感光成分の感光特性波長領域における光に対して高い吸収能を有する化合物が好ましく用いられる。吸光性化合物は一種のみを用いることもできるが、二種以上を組み合わせて用いることもできる。
半導体装置の製造に用いる基板(例えば、シリコン/二酸化シリコン被覆基板、シリコンナイトライド基板、ガラス基板、シリコンウエハ基板、ITO基板、ポリイミド基板、低誘電率材料(low−k材料)被覆基板等)の上に、スピンコート装置及びコーター装置等の適当な塗布方法により本発明の下層膜形成組成物が塗布され、その後、焼成することにより下層膜が形成される。焼成する条件としては、焼成温度80℃〜300℃、または150℃〜250℃、焼成時間0.5〜10分間または1〜5分間の中から適宜、選択される。下層膜の膜厚としては、例えば、1〜1000nmであり、または10〜500nmであり、または50〜100nmである。
プロピレングリコールモノメチルエーテル27.91gに、2−ヒドロキシプロピルメタクリレート20.93gとベンジルメタクリレート6.98gを溶解させ、反応液中に窒素を30分流した後、70℃に昇温した。反応溶液を70℃に保ちながらアゾビスイソブチロニトリル0.3gを添加し、窒素雰囲気下、70℃で24時間撹拌することにより、2−ヒドロキシプロピルメタクリレートとベンジルメタクリレートの共重合ポリマーの溶液を得た。得られたポリマーのGPC分析を行ったところ、重量平均分子量は15000(標準ポリスチレン換算)であった。
乳酸エチル30gに、2−ヒドロキシエチルアクリレート30gを溶解させ、反応液中に窒素を30分流した後、70℃に昇温した。反応溶液を70℃に保ちながらアゾビスイソブチロニトリル0.3gを添加し、窒素雰囲気下、70℃で24時間撹拌することにより、ポリ(2−ヒドロキシエチル)アクリレートの溶液を得た。得られたポリマーのGPC分析を行ったところ、重量平均分子量は9800(標準ポリスチレン換算)であった。
プロピレングリコールモノメチルエーテルアセテート7gに、チタンオキシナイトライド粒子2.7g(平均粒子径100nm、(株)アルバック・コーポレートセンター製)を分散させ、ポリオキシエチレンソルビタンモノラウレート0.3gを加えた。そして、孔径5μmのポリエチレン製ミクロフィルターを用いて濾過し、下層膜形成組成物の溶液を調製した。
30質量%で分散したチタンオキシナイトライド粒子(平均粒子径100nm、(株)アルバック・コーポレートセンター製)を含むプロピレングリコールモノメチルエーテルアセテートの溶液7.5gに、合成例1で得たポリマー0.75gを含む溶液5g、ヘキサメトキシメチルメラミン1.15g、ピリジニウム−p−トルエンスルホン酸0.012g、プロピレングリコールモノメチルエーテル0.77g、及びジメチルスルホキシド8.66gを加え30質量%溶液とした。そして、孔径0.2μmのポリエチレン製ミクロフィルターを用いて濾過し、下層膜形成組成物の溶液を調製した。
合成例1で得たポリマー5gを含む溶液10gに、ヘキサメトキシメチルメラミン1.15g、ピリジニウム−p−トルエンスルホン酸0.012g、プロピレングリコールモノメチルエーテル0.77g、及びジメチルスルホキシド8.66gを加え30質量%溶液とした。そして、孔径0.05μmのポリエチレン製ミクロフィルターを用いて濾過し、金属窒化物粒子を含まない下層膜形成組成物の溶液を調製した。
合成例2で得たポリマー5gを含む溶液10gに、ヘキサメトキシメチルメラミン1.15g、ピリジニウム−p−トルエンスルホン酸0.012g、プロピレングリコールモノメチルエーテル0.77g、及びジメチルスルホキシド8.66gを加え30質量%溶液とした。そして、孔径0.05μmのポリエチレン製ミクロフィルターを用いて濾過し、金属窒化物粒子を含まない下層膜形成組成物の溶液を調製した。
実施例1及び2で得た下層膜形成組成物の溶液をスピナーにより、それぞれ、シリコンウエハ基板上に塗布した。ホットプレート上、205℃で1分間焼成し下層膜(膜厚460nm)を形成した。これらの下層膜をフォトレジストに使用する溶剤である乳酸エチル及びプロピレングリコールモノメチルエーテルに浸漬し、それらの溶剤に不溶であることを確認した。
実施例1及び2で得た下層膜形成組成物の溶液をスピナーにより、それぞれ、シリコンウエハ基板上に塗布した。ホットプレート上、205℃で5分間焼成し、下層膜(膜厚450nm)を形成した。これらの下層膜の上層に、市販のフォトレジスト溶液(シプレー社製、商品名APEX−E等)をスピナーにより塗布した。ホットプレート上、90℃で1分間加熱してフォトレジストの層を形成した。フォトレジストを露光後、露光後加熱を90℃で1.5分間行なった。フォトレジストを現像した後、下層膜の膜厚を測定し、下層膜とフォトレジストとのインターミキシングが起こっていないことを確認した。
実施例1、2及び比較例1、2で得た下層膜形成組成物の溶液を、それぞれ、スピナーによりシリコンウエハ基板上に塗布した。ホットプレート上、205℃で5分間焼成し、下層膜(各々膜厚450nm)を形成した。そしてこれらを、日本サイエンティフィック製RIEシステムES401を用い、ドライエッチングガスとしてCF4を使用した条件下でドライエッチング速度を測定した。ドライエッチング速度は単位時間当たりの下層膜の膜厚の減少量として算出した。
ポリマーの有無に依存することなく、金属窒化物粒子の導入により、小さいエッチングの速度を有する金属窒化物粒子を含む下層膜が得られることが明らかになった。
金属窒化物粒子を含む下層膜のドライエッチング速度がフォトレジストのドライエッチング速度よりも小さいことの必要性は、下層膜上に形成されたフォトレジストを現像し、その後でドライエッチングにより半導体下地基板を加工する工程で、金属窒化物粒子を含む下層膜のドライエッチング速度の方が半導体下地加工基板のドライエッチング速度よりも小さくなることにより、フォトレジストを薄膜化でき、かつパターンを正確に基板に転写することができるためである。
Claims (9)
- 平均粒子径が1〜1000nmである金属窒化物粒子及び有機溶剤を含む、半導体装置の製造に使用される下層膜形成組成物。
- 平均粒子径が1〜1000nmである金属窒化物粒子、有機材料、及び有機溶剤を含む、半導体装置の製造に使用される下層膜形成組成物。
- 前記金属窒化物粒子が、チタン、シリコン、タンタル、タングステン、セリウム、ゲルマニウム、ハフニウム、及びガリウムからなる群から選ばれる少なくとも一種の元素を含む、請求項1または請求項2に記載の下層膜形成組成物。
- 前記金属窒化物粒子が、チタンナイトライド、チタンオキシナイトライド、シリコンナイトライド、シリコンオキシナイトライド、タンタルナイトライド、タンタルオキシナイトライド、タングステンナイトライド、タングステンオキシナイトライド、セリウムナイトライド、セリウムオキシナイトライド、ゲルマニウムナイトライド、ゲルマニウムオキシナイトライド、ハフニウムナイトライド、ハフニウムオキシナイトライド、セシウムナイトライド、セシウムオキシナイトライド、ガリウムナイトライド、及びガリウムオキシナイトライドからなる群から選ばれる少なくとも一種の金属窒化物の粒子である、請求項1または請求項2に記載の下層膜形成組成物。
- 前記有機材料が、ポリマー、架橋性化合物及び吸光性化合物からなる群から選ばれる少なくとも一つの成分である、請求項2に記載の下層膜形成組成物。
- 請求項1乃至請求項5のいずれか1項に記載の下層膜形成組成物を半導体基板上に塗布し焼成することによる、半導体装置の製造に用いる下層膜の形成方法。
- 前記焼成が焼成温度80℃〜300℃、焼成時間0.5〜10分間の条件で行なわれることを特徴とする、請求項6に記載の下層膜の形成方法。
- 請求項1乃至請求項5のいずれか1項に記載の下層膜形成組成物を半導体基板上に塗布し
焼成して下層膜を形成する工程、前記下層膜上にフォトレジスト層を形成する工程、前記下層膜と前記フォトレジスト層で被覆された半導体基板を露光する工程、露光後に現像する工程、を含む半導体装置の製造に用いるフォトレジストパターンの形成方法。 - 前記露光が248nm、193nmまたは157nmの波長の光により行われる請求項8に記載のフォトレジストパターンの形成方法。
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US11034847B2 (en) | 2017-07-14 | 2021-06-15 | Samsung Electronics Co., Ltd. | Hardmask composition, method of forming pattern using hardmask composition, and hardmask formed from hardmask composition |
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Also Published As
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KR20060134964A (ko) | 2006-12-28 |
CN1902550A (zh) | 2007-01-24 |
EP1703328B1 (en) | 2010-04-14 |
TWI383263B (zh) | 2013-01-21 |
EP1703328A1 (en) | 2006-09-20 |
CN1902550B (zh) | 2012-07-18 |
WO2005064403A1 (ja) | 2005-07-14 |
KR101158298B1 (ko) | 2012-06-26 |
US7727902B2 (en) | 2010-06-01 |
TW200527141A (en) | 2005-08-16 |
US20070148557A1 (en) | 2007-06-28 |
EP1703328A4 (en) | 2007-03-14 |
JPWO2005064403A1 (ja) | 2007-12-20 |
DE602004026635D1 (de) | 2010-05-27 |
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