WO2012032856A1 - 微細構造体のパターン倒壊抑制用処理液及びこれを用いた微細構造体の製造方法 - Google Patents
微細構造体のパターン倒壊抑制用処理液及びこれを用いた微細構造体の製造方法 Download PDFInfo
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- WO2012032856A1 WO2012032856A1 PCT/JP2011/066158 JP2011066158W WO2012032856A1 WO 2012032856 A1 WO2012032856 A1 WO 2012032856A1 JP 2011066158 W JP2011066158 W JP 2011066158W WO 2012032856 A1 WO2012032856 A1 WO 2012032856A1
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- 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
- H01L21/02041—Cleaning
- H01L21/02057—Cleaning during device manufacture
- H01L21/0206—Cleaning during device manufacture during, before or after processing of insulating layers
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- 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
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/42—Stripping or agents therefor
- G03F7/422—Stripping or agents therefor using liquids only
- G03F7/425—Stripping or agents therefor using liquids only containing mineral alkaline compounds; containing organic basic compounds, e.g. quaternary ammonium compounds; containing heterocyclic basic compounds containing nitrogen
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81C—PROCESSES OR APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OR TREATMENT OF MICROSTRUCTURAL DEVICES OR SYSTEMS
- B81C1/00—Manufacture or treatment of devices or systems in or on a substrate
- B81C1/00777—Preserve existing structures from alteration, e.g. temporary protection during manufacturing
- B81C1/00825—Protect against mechanical threats, e.g. against shocks, or residues
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/32—Organic compounds containing nitrogen
- C11D7/3209—Amines or imines with one to four nitrogen atoms; Quaternized amines
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/32—Organic compounds containing nitrogen
- C11D7/3281—Heterocyclic compounds
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- 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
- H01L21/027—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
- H01L21/0274—Photolithographic processes
Definitions
- the present invention relates to a processing solution for suppressing pattern collapse of a fine structure and a method for producing a fine structure using the same.
- a photolithography technique is used as a method for forming and processing an element having a fine structure used in a wide field such as a semiconductor device or a circuit board.
- a wide field such as a semiconductor device or a circuit board.
- the miniaturization, high integration, and high speed of semiconductor devices have advanced remarkably, and the resist pattern used for photolithography has become finer and the aspect ratio has been increasing. I'm following.
- the miniaturization or the like progresses, the collapse of the resist pattern becomes a big problem.
- the collapse of the resist pattern is caused by the surface tension of the processing liquid when the processing liquid used in the wet processing (mainly rinse processing for washing away the developing solution) after developing the resist pattern is dried from the resist pattern. It is known that it is generated by the action of stress. Therefore, in order to solve the collapse of the resist pattern, a method of drying by replacing the cleaning liquid with a low surface tension liquid using a nonionic surfactant or an alcohol solvent-soluble compound (for example, Patent Documents 1 and 2). And a method of hydrophobizing the surface of the resist pattern (for example, see Patent Document 3).
- the present invention has been made under such circumstances, and provides a treatment liquid capable of suppressing pattern collapse of a fine structure made of silicon oxide such as a semiconductor device or a micromachine, and a method of manufacturing a fine structure using the same. It is for the purpose.
- an imidazolium halide having a C12, C14, C16 alkyl group, a C14, C16 alkyl group has been found that the object can be achieved by a treatment liquid containing at least one of pyridinium halides having an alkyl group and ammonium halides having 16 or 18 carbon atoms.
- the present invention has been completed based on such findings. That is, the gist of the present invention is as follows.
- the imidazolium halide is one or more selected from 1-dodecyl-3-methylimidazolium chloride, 1-tetradecyl-3-methylimidazolium chloride and 1-hexadecyl-3-methylimidazolium chloride. Treatment liquid for pattern collapse suppression. 4).
- the pattern collapse inhibition according to item 1, wherein the pyridinium halide is at least one selected from tetradecylpyridinium chloride, hexadecylpyridinium chloride, 1-tetradecyl-4-methylpyridinium chloride and 1-hexadecyl-4-methylpyridinium chloride.
- Treatment liquid. 5 is at least one selected from tetradecylpyridinium chloride, hexadecylpyridinium chloride, 1-tetradecyl-4-methylpyridinium chloride and 1-hexadecyl-4-methylpyridinium chloride.
- a method for producing a microstructure comprising silicon oxide comprising using a treatment liquid for suppressing pattern collapse of a microstructure comprising at least one selected from ammonium halides having an alkyl group having 18 carbon atoms and water. 8).
- a treatment liquid for suppressing pattern collapse of a microstructure comprising at least one selected from ammonium halides having an alkyl group having 18 carbon atoms and water.
- the present invention it is possible to provide a treatment liquid capable of suppressing pattern collapse of a fine structure made of silicon oxide such as a semiconductor device or a micromachine, and a method of manufacturing a fine structure using the same.
- the treatment liquid of the present invention (treatment liquid for pattern collapse suppression) is used for pattern collapse suppression of a fine structure made of silicon oxide, and has an imidazolium halide having an alkyl group having 12 carbon atoms, 14 carbon atoms, or 16 carbon atoms, It contains at least one selected from pyridinium halides having a C14 or C16 alkyl group and ammonium halides having a C16 or C18 alkyl group and water.
- the “fine structure made of silicon oxide” refers to a fine structure in which a portion to be treated with the treatment liquid is made of silicon oxide.
- the alkyl group having 12 carbon atoms is preferably a dodecyl group, the alkyl group having 14 carbon atoms is a tetradecyl group, the alkyl group having 16 carbon atoms is a hexadecyl group, and the alkyl group having 18 carbon atoms is preferably an okdadecyl group.
- Such a compound having a linear alkyl group can be adsorbed onto the silicon oxide material at a higher density than a branched alkyl group.
- the halide is preferably chlorine.
- Examples of the imidazolium halide having an alkyl group having 12 carbon atoms, 14 carbon atoms and 16 carbon atoms include 1-dodecyl-3-methylimidazolium chloride, 1-dodecyl-3-methylimidazolium bromide, 1-dodecyl-3- Methylimidazolium iodide, 1-methyl-3-dodecylimidazolium chloride, 1-methyl-3-dodecylimidazolium bromide, 1-methyl-3-dodecylimidazolium iodide, 1-dodecyl-2-methyl-3- Benzylimidazolium chloride, 1-dodecyl-2-methyl-3-benzylimidazolium bromide, 1-dodecyl-2-methyl-3-benzylimidazolium iodide, 1-tetradecyl-3-methylimidazolium chloride, 1-tetradecyl
- Examples of the pyridinium halide having an alkyl group having 14 or 16 carbon atoms include tetradecylpyridinium chloride, tetradecylpyridinium bromide, tetradecylpyridinium iodide, hexadecylpyridinium chloride, hexadecylpyridinium bromide, hexadecylpyridinium iodide, 1 -Tetradecyl-4-methylpyridinium chloride, 1-tetradecyl-4-methylpyridinium bromide, 1-tetradecyl-4-methylpyridinium iodide, 1-hexadecyl-4-methylpyridinium chloride, 1-hexadecyl-4-methylpyridinium bromide, 1-hexadecyl-4-methylpyridinium iodide and the like, and in particular, tetradecylpyridinium
- ammonium halide having an alkyl group having 16 or 18 carbon atoms examples include hexadecyltrimethylammonium chloride, hexadecyltrimethylammonium bromide, hexadecyltrimethylammonium iodide, octadecyltrimethylammonium chloride, octadecyltrimethylammonium bromide, octadecyltrimethylammonium iodide.
- the treatment liquid of the present invention is preferably an aqueous solution.
- the water used is preferably water from which metal ions, organic impurities, particle particles, and the like have been removed by distillation, ion exchange treatment, filter treatment, various adsorption treatments, and the like, and pure water and ultrapure water are particularly preferred.
- the treatment liquid of the present invention includes the imidazolium halide having an alkyl group having 12 carbon atoms, 14 carbon atoms, or 16 carbon atoms, pyridinium halide having an alkyl group having 14 carbon atoms or 16 carbon atoms, 16 carbon atoms, or 16 carbon atoms. It contains at least one selected from ammonium halides having 18 alkyl groups and water, and also contains various additives usually used in the treatment liquid as long as the effects of the treatment liquid are not impaired.
- an imidazolium halide having an alkyl group having 12, 12 or 16 carbon atoms, a pyridinium halide having an alkyl group having 14 or 16 carbon atoms, 16 or 18 carbon atoms is preferably 10 ppm to 10%. If the content of the aforementioned compound is within the above range, the effects of these compounds can be sufficiently obtained, but in consideration of ease of handling, economy and foaming, it is preferable to use at a lower concentration of 5% or less.
- the content is preferably 10 to 2000 ppm, and more preferably 10 to 1000 ppm.
- an organic solvent such as alcohol may be added, or the solubility may be supplemented by adding an acid or an alkali.
- an organic solvent such as alcohol
- the treatment liquid of the present invention is suitably used for suppressing pattern collapse of fine structures such as semiconductor devices and micromachines.
- a pattern of the fine structure a pattern using silicon oxide is preferably exemplified.
- the microstructure is TEOS (tetraethoxyorthosilane oxide film) or SiOC-based low dielectric constant film (Black Diamond 2 (trade name) manufactured by Applied Materials, Aurora 2.7 or Aurora 2.4 (trade name) manufactured by ASM International). ) Or the like, or a part of the fine structure may include the insulating film type.
- the treatment liquid of the present invention can exhibit an excellent effect of suppressing pattern collapse not only to a conventional fine structure but also to a fine structure having a finer and higher aspect ratio.
- the aspect ratio is a value calculated by (pattern height / pattern width)
- the treatment liquid of the present invention is an excellent pattern for patterns having a high aspect ratio of 3 or more, and further 7 or more.
- the treatment liquid of the present invention has a fine pattern of 1: 1 line and space, even if the pattern size (pattern width) is 300 nm or less, 150 nm or less, 100 nm or less, and even 50 nm or less. It has an excellent effect of suppressing pattern collapse on a fine pattern having a cylindrical or columnar structure in which the interval between patterns is 300 nm or less, 150 nm or less, 100 nm or less, or 50 nm or less.
- the method for producing a microstructure comprising silicon oxide according to the present invention is characterized in that the above-described treatment liquid of the present invention is used in a cleaning step after wet etching or dry etching. More specifically, in the cleaning step, preferably the fine structure pattern and the treatment liquid of the present invention are brought into contact with each other by dipping, spray discharge, spraying, etc., and then the treatment liquid is replaced with water and then dried.
- the immersion time is preferably 10 seconds to 30 minutes, more preferably 15 seconds to 20 minutes, still more preferably 20 seconds to 15 minutes
- the temperature condition is particularly preferably 30 seconds to 10 minutes, and the temperature condition is preferably 10 to 80 ° C., more preferably 15 to 60 ° C., still more preferably 25 to 50 ° C., and particularly preferably 25 to 40 ° C.
- the surface of the pattern is hydrophobized so that the collapse of the pattern can be suppressed.
- the treatment liquid of the present invention has a wet etching process or a dry etching process in the manufacturing process of the fine structure, followed by wet treatment (etching or cleaning, rinsing for washing away the cleaning liquid), and then drying. If it has a process, it can apply widely irrespective of the kind of microstructure. For example, (i) in the manufacture of a DRAM type semiconductor device, after wet etching is performed on an insulating film around a conductive film (see, for example, Japanese Patent Laid-Open Nos.
- a strip After a cleaning process for removing contaminants generated after dry etching or wet etching at the time of processing a gate electrode in the manufacture of a semiconductor device having a transistor having a fin-like shape for example, Japanese Patent Application Laid-Open No.
- Examples 1 to 11 As shown in FIG. 1A, after silicon nitride 103 (thickness: 100 nm) and silicon oxide 102 (thickness: 1200 nm) are formed on a silicon substrate 104, a photoresist 101 is formed. By exposing and developing 101, a cylindrical (chimney-like) photoresist 105 ( ⁇ 125 nm, distance between circles: 50 nm) shown in FIG. 1B was formed. Next, the cylinder 106 shown in FIG. 1C was etched to the silicon nitride layer 103 by dry etching using the photoresist 105 as a mask. At that time, etching residues 107 were generated inside and outside the cylinder.
- the photoresist 105 was removed by ashing to obtain a structure having a cylinder 106 made of silicon oxide reaching the layer of silicon nitride 103 shown in FIG.
- a 0.1 wt% hydrofluoric acid aqueous solution 25 ° C., 30 seconds immersion treatment
- pure water treatment solutions 1 to 11 in Table 1 (30 ° C., 10 minutes) Liquid immersion treatment
- pure water in that order, followed by drying to obtain FIG. 1 (e).
- the obtained structure is a fine structure having a cylindrical (chimney-like) pattern of silicon oxide ( ⁇ 125 nm, height: 1200 nm (aspect ratio: 9.6), distance between cylinder: 50 nm). Yes, more than 70% of the pattern did not collapse.
- pattern collapse was observed using “FE-SEM S-5500 (model number)” manufactured by Hitachi High-Technologies Corporation, and the collapse suppression rate was calculated as the ratio of the pattern that did not collapse in the total number of patterns. It was determined to be acceptable if the collapse inhibition rate was 50% or more.
- Table 3 shows the results of the treatment liquid, the treatment method, and the collapse inhibition rate used in each example.
- Example 1 the etching residue 107 of the structure shown in FIG. 1 (d) was removed with a 0.1 wt% hydrofluoric acid aqueous solution (25 ° C., 30 seconds immersion treatment), and then treated with pure water only. Was carried out in the same manner as in Example 1. 50% or more of the pattern of the obtained structure caused the collapse as shown in FIG. 1 (f) (the collapse suppression rate is less than 50%).
- Table 3 shows the results of the treatment liquid, the treatment method, and the collapse inhibition rate used in Comparative Example 1.
- Example 1 the etching residue 107 of the structure shown in FIG. 1 (d) was removed with a 0.1 wt% hydrofluoric acid aqueous solution (25 ° C., 30 seconds immersion treatment) and treated with pure water, and then the treatment liquid Example 1 was carried out in the same manner as in Example 1 except that the treatments were carried out using Comparative Solutions 2 to 15 shown in Table 2 instead of 1. Over 50% of the pattern of the obtained structure collapsed as shown in FIG. Table 3 shows the results of the treatment liquid, the treatment method, and the collapse inhibition rate used in each of Comparative Examples 2 to 15.
- the treatment liquid of the present invention can be suitably used for suppressing pattern collapse in the production of microstructures made of silicon oxide such as semiconductor devices and micromachines (MEMS).
- MEMS micromachines
- Photoresist 102 Silicon oxide 103. Silicon nitride 104. Silicon substrate 105. Circular photoresist 106. Cylindrical (silicon oxide) 107. Etching residue
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Abstract
Description
本発明は、このような状況下になされたもので、半導体装置やマイクロマシンといった酸化珪素からなる微細構造体のパターン倒壊を抑制しうる処理液及びこれを用いた微細構造体の製造方法を提供することを目的とするものである。
本発明は、かかる知見に基づいて完成したものである。すなわち、本発明の要旨は下記のとおりである。
2.炭素数12のアルキル基がドデシル基、炭素数14のアルキル基がテトラデシル基、炭素数16のアルキル基がヘキサデシル基、炭素数18のアルキル基がオクダデシル基である第1項記載のパターン倒壊抑制用処理液。
3.イミダゾリウムハライドが、1-ドデシル-3-メチルイミダゾリウムクロリド、1-テトラデシル-3-メチルイミダゾリウムクロリドおよび1-ヘキサデシル-3-メチルイミダゾリウムクロリドから選択される1種以上である第1項記載のパターン倒壊抑制用処理液。
4.ピリジニウムハライドが、テトラデシルピリジニウムクロリド、ヘキサデシルピリジニウムクロリド、1-テトラデシル-4-メチルピリジニウムクロリドおよび1-ヘキサデシル-4-メチルピリジニウムクロリドから選択される1種以上である第1項記載のパターン倒壊抑制用処理液。
5.アンモニウムハライドが、ヘキサデシルトリメチルアンモニウムクロリド、オクタデシルトリメチルアンモニウムクロリド、ベンジルジメチルヘキサデシルアンモニウムクロリドおよびベンジルジメチルオクダデシルアンモニウムクロリドから選択される1種以上である第1項記載のパターン倒壊抑制用処理液。
6.イミダゾリウムハライド、ピリジニウムハライドおよびアンモニウムハライドの含有量が10ppm~10%である第1項に記載のパターン倒壊抑制用処理液。
7.ウェットエッチングまたはドライエッチングの後の洗浄工程において、炭素数12、炭素数14または炭素数16のアルキル基を有するイミダゾリウムハライド、炭素数14または炭素数16のアルキル基を有するピリジニウムハライドおよび炭素数16または炭素数18のアルキル基を有するアンモニウムハライドから選択される少なくとも一種と水を含有する微細構造体のパターン倒壊抑制用処理液を用いることを特徴とする酸化珪素からなる微細構造体の製造方法。
8.酸化珪素からなる微細構造体が、半導体装置又はマイクロマシンである第7項に記載の微細構造体の製造方法。
本発明の処理液(パターン倒壊抑制用処理液)は、酸化珪素からなる微細構造体のパターン倒壊抑制に用いられ、炭素数12、炭素数14または炭素数16のアルキル基を有するイミダゾリウムハライド、炭素数14または炭素数16のアルキル基を有するピリジニウムハライド、炭素数16または炭素数18のアルキル基を有するアンモニウムハライドから選択される少なくとも一種と水を含むものである。
ここで、「酸化珪素からなる微細構造体」とは、処理液により処理される部分が酸化珪素からなる微細構造体をいう。
また、実用性を考慮すると、ハライドとしては塩素であることが好ましい。
なお、微細構造体は、TEOS(テトラエトキシオルソシラン酸化膜)やSiOC系低低誘電率膜(AppliedMaterials社製Black Diamond2(商品名)、ASM International社製Aurora2.7やAurora2.4(商品名))などの絶縁膜種の上にパターニングされる場合や、微細構造の一部に絶縁膜種が含まれる場合がある。
本発明の酸化珪素からなる微細構造体の製造方法は、ウェットエッチング又はドライエッチングの後の洗浄工程において、上記した本発明の処理液を用いることを特徴とするものである。より具体的には、該洗浄工程において、好ましくは微細構造体のパターンと本発明の処理液とを浸漬、スプレー吐出、噴霧などにより接触させた後、水で該処理液を置換してから乾燥させる。ここで微細構造体のパターンと本発明の処理液とを浸漬により接触させる場合、浸漬時間は10秒~30分が好ましく、より好ましくは15秒~20分、さらに好ましくは20秒~15分、特に好ましくは30秒~10分であり、温度条件は10~80℃が好ましく、より好ましくは15~60℃、さらに好ましくは25~50℃、特に好ましくは25~40℃である。また、微細構造体のパターンと本発明の処理液との接触の前に、あらかじめ水で洗浄を行ってもよい。このように、微細構造体のパターンと本発明の処理液とを接触させることにより、該パターンの表面上を疎水化することにより、該パターンの倒壊を抑制することが可能となる。
表1に示される配合組成(質量%)に従い、微細構造体のパターン倒壊抑制用処理液を調合した。
図1(a)に示すように、シリコン基板104上に窒化珪素103(厚さ:100nm)及び酸化珪素102(厚さ:1200nm)を成膜した後、フォトレジスト101を形成し、該フォトレジスト101を露光、現像することにより、図1(b)に示す筒状(煙突状)フォトレジスト105(φ125nm、円と円との距離:50nm)を形成した。次に、該フォトレジスト105をマスクとしてドライエッチングにより酸化珪素102に図1(c)に示す円筒106を、窒化珪素103の層までエッチングして形成した。その際、円筒の内側と外側にエッチング残渣107が生成された。次いで、フォトレジスト105をアッシングにより除去し、図1(d)に示す窒化珪素103の層に達した酸化珪素でできた円筒106を持つ構造体を得た。得られた構造体のエッチング残渣107を0.1重量%フッ酸水溶液により除去(25℃、30秒の浸漬処理)した後、純水、表1の処理液1~11(30℃、10分の浸漬処理)及び純水の順で接液処理し、乾燥を行い、図1(e)を得た。
ここで、パターンの倒壊は、「FE-SEM S-5500(型番)」:日立ハイテクノロジーズ社製を用いて観察し、倒壊抑制率は、パターン全本数中の倒壊しなかったパターンの割合を算出して求めた数値であり、該倒壊抑制率が50%以上であれば合格と判断した。各例において使用した処理液、処理方法及び倒壊抑制率の結果を表3に示す。
実施例1において、図1(d)に示される構造体のエッチング残渣107を0.1重量%フッ酸水溶液により除去(25℃、30秒の浸漬処理)した後、純水のみで処理した以外は、実施例1と同様に実施した。得られた構造体のパターンの50%以上は、図1(f)に示されるような倒壊をおこしていた(倒壊抑制率は50%未満となる。)。比較例1において使用した処理液、処理方法及び倒壊抑制率の結果を表3に示す。
実施例1において、図1(d)に示される構造体のエッチング残渣107を0.1重量%フッ酸水溶液により除去(25℃、30秒の浸漬処理)し純水で処理した後、処理液1の代わりに表2に示す比較液2~15で処理する以外は、実施例1と同様に実施した。得られた構造体のパターンの50%以上は、図1(f)に示されるような倒壊をおこしていた。各比較例2~15において使用した処理液、処理方法及び倒壊抑制率の結果を表3に示す。
*2:「サーフロンS-111(商品名、AGCセイミケミカル(株)製)、比重1.0(20℃)、引火点(タグ密閉式)18℃」;0.01%水溶液
*3:「サーフィノール420(商品名、日信化学工業株式会社製)、エチレンオキサイド含有量20%」;0.01%水溶液
*4:「サーフィノール104(商品名、日信化学工業株式会社製)」;0.01%水
*5:「エパン420(商品名、第一工業製薬株式会社製)、疎水基(ポリオキシプロピレン)平均分子量1200、ポリオキシエチレン含有率20%」;0.01%水溶液
*6~*11;0.01%水溶液
102.酸化珪素
103.窒化珪素
104.シリコン基板
105.円状フォトレジスト
106.円筒(酸化珪素)
107.エッチング残渣
Claims (8)
- 酸化珪素からなる微細構造体のパターン倒壊抑制用処理液であって、炭素数12、炭素数14または炭素数16のアルキル基を有するイミダゾリウムハライド、炭素数14または炭素数16のアルキル基を有するピリジニウムハライドおよび炭素数16または炭素数18のアルキル基を有するアンモニウムハライドから選択される少なくとも一種と水を含有する微細構造体のパターン倒壊抑制用処理液。
- 炭素数12のアルキル基がドデシル基、炭素数14のアルキル基がテトラデシル基、炭素数16のアルキル基がヘキサデシル基、炭素数18のアルキル基がオクダデシル基である請求項1記載のパターン倒壊抑制用処理液。
- イミダゾリウムハライドが、1-ドデシル-3-メチルイミダゾリウムクロリド、1-テトラデシル-3-メチルイミダゾリウムクロリドおよび1-ヘキサデシル-3-メチルイミダゾリウムクロリドから選択される1種以上である請求項1記載のパターン倒壊抑制
用処理液。 - ピリジニウムハライドが、テトラデシルピリジニウムクロリド、ヘキサデシルピリジニウムクロリド、1-テトラデシル-4-メチルピリジニウムクロリドおよび1-ヘキサデシル-4-メチルピリジニウムクロリドから選択される1種以上である請求項1記載のパターン倒壊抑制用処理液。
- アンモニウムハライドが、ヘキサデシルトリメチルアンモニウムクロリド、オクタデシルトリメチルアンモニウムクロリド、ベンジルジメチルヘキサデシルアンモニウムクロリドおよびベンジルジメチルオクダデシルアンモニウムクロリドから選択される1種以上である請求項1記載のパターン倒壊抑制用処理液。
- イミダゾリウムハライド、ピリジニウムハライドおよびアンモニウムハライドの含有量が10ppm~10%である請求項1に記載のパターン倒壊抑制用処理液。
- ウェットエッチングまたはドライエッチングの後の洗浄工程において、炭素数12、炭素数14または炭素数16のアルキル基を有するイミダゾリウムハライド、炭素数14または炭素数16のアルキル基を有するピリジニウムハライドおよび炭素数16または炭素数18のアルキル基を有するアンモニウムハライドから選択される少なくとも一種と水を含有する微細構造体のパターン倒壊抑制用処理液を用いることを特徴とする酸化珪素からなる微細構造体の製造方法。
- 酸化珪素からなる微細構造体が、半導体装置又はマイクロマシンである請求項7に記載の微細構造体の製造方法。
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