WO2018088469A1 - Photosensitive resin composition, resin film, cured film, semiconductor device production method, and semiconductor device - Google Patents
Photosensitive resin composition, resin film, cured film, semiconductor device production method, and semiconductor device Download PDFInfo
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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
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G8/00—Condensation polymers of aldehydes or ketones with phenols only
- C08G8/04—Condensation polymers of aldehydes or ketones with phenols only of aldehydes
- C08G8/08—Condensation polymers of aldehydes or ketones with phenols only of aldehydes of formaldehyde, e.g. of formaldehyde formed in situ
- C08G8/20—Condensation polymers of aldehydes or ketones with phenols only of aldehydes of formaldehyde, e.g. of formaldehyde formed in situ with polyhydric phenols
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/04—Condensation polymers of aldehydes or ketones with phenols only
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- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
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- 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
- G03F7/022—Quinonediazides
- G03F7/023—Macromolecular quinonediazides; Macromolecular additives, e.g. binders
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- 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
- G03F7/038—Macromolecular compounds which are rendered insoluble or differentially wettable
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- 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
- G03F7/075—Silicon-containing compounds
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- 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
- G03F7/16—Coating processes; Apparatus therefor
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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
- G03F7/16—Coating processes; Apparatus therefor
- G03F7/168—Finishing the coated layer, e.g. drying, baking, soaking
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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
- G03F7/20—Exposure; Apparatus therefor
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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
- G03F7/40—Treatment after imagewise removal, e.g. baking
Abstract
Description
本願は、2016年11月11日に、日本に出願された特願2016-220584号に基づき優先権を主張し、その内容をここに援用する。 The present invention relates to a photosensitive resin composition, a method for manufacturing a semiconductor device, a resin film, a cured film, and a semiconductor device. More specifically, the present invention relates to a photosensitive resin composition that can be used as a resist used for manufacturing a semiconductor device or as a precursor of a heat-resistant resin used for a semiconductor element surface protective film or an interlayer insulating film.
This application claims priority on November 11, 2016 based on Japanese Patent Application No. 2016-22058 for which it applied to Japan, and uses the content here.
〔1〕 ビフェノール構造を有するフェノール樹脂(A)と、
光酸発生剤(B)と、
溶剤と、を含む感光性樹脂組成物。
〔2〕 前記フェノール樹脂(A)が、ビフェノール化合物と、アルデヒド化合物、ジメチロール化合物、ジメトキシメチル化合物およびジハロアルキル化合物からなる群より選択される少なくとも1種の化合物とに由来する構造単位を有する、前記〔1〕に記載の感光性樹脂組成物。 As a result of intensive studies to solve the above problems, the present inventors have completed the present invention including the following embodiments.
[1] A phenol resin (A) having a biphenol structure;
A photoacid generator (B);
A photosensitive resin composition comprising a solvent.
[2] The phenol resin (A) has a structural unit derived from a biphenol compound and at least one compound selected from the group consisting of an aldehyde compound, a dimethylol compound, a dimethoxymethyl compound, and a dihaloalkyl compound, The photosensitive resin composition as described in [1].
R11、およびR12は、それぞれ独立して、水酸基、ハロゲン原子、カルボキシル基、炭素数1~20の飽和または不飽和のアルキル基、炭素数1~20のアルキルエーテル基、炭素数3~20の飽和または不飽和の脂環式基、または炭素数6~20の芳香族構造を有する有機基からなる群から選ばれる1価の置換基であり、これらはエステル結合、エーテル結合、アミド結合、またはカルボニル結合を介して結合していてもよく、
p、およびqは、それぞれ独立して、0~3の整数であり、
X1、およびY1は、それぞれ独立して、単結合、または不飽和結合を有していてもよい炭素数1~10の脂肪族基、炭素数3~20の脂環式基、および炭素数6~20の芳香族構造を有する有機基からなる群から選ばれる2価の置換基であり、
ただし、Y1は、2つのベンゼン環のうちいずれか一方に結合する)。 [3] The photosensitive resin composition according to [1] or [2], wherein the phenol resin (A) is a resin having a structural unit represented by the formula (1).
R 11 and R 12 are each independently a hydroxyl group, a halogen atom, a carboxyl group, a saturated or unsaturated alkyl group having 1 to 20 carbon atoms, an alkyl ether group having 1 to 20 carbon atoms, or 3 to 20 carbon atoms. A monovalent substituent selected from the group consisting of a saturated or unsaturated alicyclic group or an organic group having an aromatic structure having 6 to 20 carbon atoms, and these are an ester bond, an ether bond, an amide bond, Or may be bonded via a carbonyl bond,
p and q are each independently an integer of 0 to 3,
X 1 and Y 1 each independently represent a single bond or an unsaturated bond, an aliphatic group having 1 to 10 carbon atoms, an alicyclic group having 3 to 20 carbon atoms, and carbon. A divalent substituent selected from the group consisting of organic groups having an aromatic structure of several 6 to 20,
Y 1 is bonded to one of the two benzene rings).
mは、2~10000の整数であり、
R11、およびR12は、それぞれ独立して、水酸基、ハロゲン原子、カルボキシル基、炭素数1~20の飽和または不飽和のアルキル基、炭素数1~20のアルキルエーテル基、炭素数3~20の飽和または不飽和の脂環式基、または炭素数6~20の芳香族構造を有する有機基からなる群から選ばれる1価の置換基であり、これらはエステル結合、エーテル結合、アミド結合、またはカルボニル結合を介して結合していてもよく、
p、およびqは、それぞれ独立して、0~3の整数であり、
X1、およびY1は、それぞれ独立して、単結合、または不飽和結合を有していてもよい炭素数1~10の脂肪族基、炭素数3~20の脂環式基、および炭素数6~20の芳香族構造を有する有機基からなる群から選ばれる2価の置換基であり、
ただし、Y1は、2つのベンゼン環のうちいずれか一方に結合する)。 [4] The photosensitive resin composition according to any one of [1] to [3], wherein the phenol resin (A) has a repeating structural unit represented by the formula (2).
m is an integer of 2 to 10,000,
R 11 and R 12 are each independently a hydroxyl group, a halogen atom, a carboxyl group, a saturated or unsaturated alkyl group having 1 to 20 carbon atoms, an alkyl ether group having 1 to 20 carbon atoms, or 3 to 20 carbon atoms. A monovalent substituent selected from the group consisting of a saturated or unsaturated alicyclic group or an organic group having an aromatic structure having 6 to 20 carbon atoms, and these are an ester bond, an ether bond, an amide bond, Or may be bonded via a carbonyl bond,
p and q are each independently an integer of 0 to 3,
X 1 and Y 1 each independently represent a single bond or an unsaturated bond, an aliphatic group having 1 to 10 carbon atoms, an alicyclic group having 3 to 20 carbon atoms, and carbon. A divalent substituent selected from the group consisting of organic groups having an aromatic structure of several 6 to 20,
Y 1 is bonded to one of the two benzene rings).
〔6〕 前記フェノール樹脂(A)と反応可能な基を有する架橋剤(C)をさらに含む、前記〔1〕乃至〔5〕のいずれかひとつに記載の感光性樹脂組成物。
〔7〕 前記フェノール樹脂(A)のポリスチレン換算での重量平均分子量が1000~100000である、前記〔1〕乃至〔6〕のいずれかひとつに記載の感光性樹脂組成物。 [5] The photosensitive resin composition according to any one of [1] to [4], wherein the photoacid generator (B) is a compound that generates an acid upon irradiation with radiation having a wavelength of 200 to 500 nm. object.
[6] The photosensitive resin composition according to any one of [1] to [5], further including a crosslinking agent (C) having a group capable of reacting with the phenol resin (A).
[7] The photosensitive resin composition according to any one of [1] to [6], wherein the phenol resin (A) has a weight average molecular weight in terms of polystyrene of 1,000 to 100,000.
〔9〕 非イオン性界面活性剤(E)をさらに含む、前記〔1〕乃至〔8〕のいずれかひとつに記載の感光性樹脂組成物。
〔10〕 反応促進剤(F)をさらに含む、前記〔1〕乃至〔9〕のいずれかひとつに記載の感光性樹脂組成物。 [8] The photosensitive resin composition according to any one of [1] to [7], further including a silane coupling agent (D).
[9] The photosensitive resin composition according to any one of [1] to [8], further including a nonionic surfactant (E).
[10] The photosensitive resin composition according to any one of [1] to [9], further including a reaction accelerator (F).
半導体基板上に、前記〔1〕乃至〔10〕のいずれかひとつに記載の感光性樹脂組成物を塗布する工程、
前記感光性樹脂組成物を加熱乾燥して、感光性樹脂層を得る工程、
前記感光性樹脂層を活性光線で露光する工程、
前記露光された感光性樹脂層を現像して、パターニングされた樹脂層を得る工程、および
前記パターニングされた樹脂層を加熱して、硬化樹脂層を得る工程、
を含む、半導体装置の製造方法。
〔12〕 前記〔1〕乃至〔10〕のいずれかひとつに記載の感光性樹脂組成物からなる樹脂膜。
〔13〕 前記〔12〕に記載の樹脂膜の硬化膜。
〔14〕 前記〔13〕に記載の硬化膜を備える半導体装置。 [11] The following steps:
Applying a photosensitive resin composition according to any one of [1] to [10] on a semiconductor substrate;
A step of heating and drying the photosensitive resin composition to obtain a photosensitive resin layer;
Exposing the photosensitive resin layer with actinic rays;
Developing the exposed photosensitive resin layer to obtain a patterned resin layer; and heating the patterned resin layer to obtain a cured resin layer;
A method for manufacturing a semiconductor device, comprising:
[12] A resin film comprising the photosensitive resin composition according to any one of [1] to [10].
[13] A cured film of the resin film according to [12].
[14] A semiconductor device comprising the cured film according to [13].
本実施形態に従う感光性樹脂組成物は、ビフェノール構造を有するフェノール樹脂(A)と、光酸発生剤(B)と、溶剤と、を含む。
本実施形態の樹脂組成物は、フェノール樹脂(A)として、ビフェノール構造を有する樹脂、すなわちフェニル基それぞれに少なくとも1つの水酸基を有するビフェニルジイル構造を有するフェノール樹脂を用いることにより、前記組成物からなる樹脂膜の耐熱性が向上する。そのため、前記感光性樹脂組成物からなる樹脂膜を露光、現像してパターン形成する際、前記樹脂膜に高解像度のパターンを形成することができる。 (Photosensitive resin composition)
The photosensitive resin composition according to the present embodiment includes a phenol resin (A) having a biphenol structure, a photoacid generator (B), and a solvent.
The resin composition of the present embodiment comprises the above composition by using a resin having a biphenol structure as the phenol resin (A), that is, a phenol resin having a biphenyldiyl structure having at least one hydroxyl group for each phenyl group. The heat resistance of the resin film is improved. Therefore, when the resin film made of the photosensitive resin composition is exposed and developed to form a pattern, a high-resolution pattern can be formed on the resin film.
一実施形態において、フェノール樹脂(A)は、ビフェノール化合物と、アルデヒド化合物、ジメチロール化合物、ジメトキシメチル化合物およびジハロアルキル化合物からなる群より選択される少なくとも1種の化合物とに由来する構造単位を有する。換言すると、フェノール樹脂(A)は、ビフェノール化合物と、アルデヒド化合物、ジメチロール化合物、ジメトキシメチル化合物およびジハロアルキル化合物からなる群より選択される少なくとも1種の化合物との反応により得られる。
本明細書において、「(物質)に由来する構造」とは、前記物質を用いて製造された構造をいい、前記構造が当該技術分野における通常の方法を用いて同定できる場合と、同定できない場合との両方を含む。
このようなフェノール樹脂(A)は、煩雑な工程を必要とすることなく、市販の原料モノマーを用いて製造することができるため、得られる感光性樹脂組成物を低コストで製造することができる。 (Phenolic resin (A))
In one embodiment, the phenol resin (A) has a structural unit derived from a biphenol compound and at least one compound selected from the group consisting of an aldehyde compound, a dimethylol compound, a dimethoxymethyl compound, and a dihaloalkyl compound. In other words, the phenol resin (A) is obtained by a reaction between a biphenol compound and at least one compound selected from the group consisting of an aldehyde compound, a dimethylol compound, a dimethoxymethyl compound, and a dihaloalkyl compound.
In this specification, the “structure derived from (substance)” means a structure manufactured using the substance, and the case where the structure can be identified using a normal method in the technical field and the case where the structure cannot be identified And both.
Since such a phenol resin (A) can be manufactured using a commercially available raw material monomer without requiring a complicated process, the resulting photosensitive resin composition can be manufactured at low cost. .
このようなビフェノール化合物は、たとえば以下の化合物により例示されるが、これらに限定されない。
Such biphenol compounds are exemplified by the following compounds, but are not limited thereto.
上記化合物は、1種単独で用いても、2種以上を組み合わせて用いてもよい。 Examples of the dihaloalkyl compound that generates the phenol resin (A) by the reaction with the biphenol compound include xylene dichloride, bischloromethyldimethoxybenzene, bischloromethyldurene, bischloromethylbiphenyl, bischloromethyl-biphenylcarboxylic acid, bis Chloromethyl-biphenyldicarboxylic acid, bischloromethyl-methylbiphenyl, bischloromethyl-dimethylbiphenyl, bischloromethylanthracene, ethylene glycol bis (chloroethyl) ether, diethylene glycol bis (chloroethyl) ether, triethylene glycol bis (chloroethyl) ether, Examples include tetraethylene glycol bis (chloroethyl) ether.
The said compound may be used individually by 1 type, or may be used in combination of 2 or more type.
R11、およびR12は、それぞれ独立して、水酸基、ハロゲン原子、カルボキシル基、炭素数1~20の飽和または不飽和のアルキル基、炭素数1~20のアルキルエーテル基、炭素数3~20の飽和または不飽和の脂環式基、または炭素数6~20の芳香族構造を有する有機基からなる群から選ばれる1価の置換基であり、これらはエステル結合、エーテル結合、アミド結合、またはカルボニル結合を介して結合していてもよく、
p、およびqは、それぞれ独立して、0~3の整数であり、
X1、およびY1は、それぞれ独立して、単結合、または不飽和結合を有していてもよい炭素数1~10の脂肪族基、炭素数3~20の脂環式基、および炭素数6~20の芳香族構造を有する有機基からなる群から選ばれる2価の置換基であり、
ただし、Y1は、2つのベンゼン環のうちいずれか一方に結合する。 In one Embodiment, the phenol resin (A) obtained from said compound may have a structural unit represented by Formula (1).
R 11 and R 12 are each independently a hydroxyl group, a halogen atom, a carboxyl group, a saturated or unsaturated alkyl group having 1 to 20 carbon atoms, an alkyl ether group having 1 to 20 carbon atoms, or 3 to 20 carbon atoms. A monovalent substituent selected from the group consisting of a saturated or unsaturated alicyclic group or an organic group having an aromatic structure having 6 to 20 carbon atoms, and these are an ester bond, an ether bond, an amide bond, Or may be bonded via a carbonyl bond,
p and q are each independently an integer of 0 to 3,
X 1 and Y 1 each independently represent a single bond or an unsaturated bond, an aliphatic group having 1 to 10 carbon atoms, an alicyclic group having 3 to 20 carbon atoms, and carbon. A divalent substituent selected from the group consisting of organic groups having an aromatic structure of several 6 to 20,
However, Y 1 is bonded to either one of the two benzene rings.
p、およびqは、それぞれ独立して、0~2の整数であることが好ましい。
X1、およびY1は、それぞれ独立して、単結合、または不飽和結合を有していてもよい炭素数1~10の脂肪族基、および炭素数6~20の芳香族構造を有する有機基からなる群から選ばれる2価の置換基であることが好ましい。 R 11 and R 12 are preferably each independently a hydroxyl group.
p and q are preferably each independently an integer of 0 to 2.
X 1 and Y 1 are each independently an organic group having an aliphatic structure having 1 to 10 carbon atoms which may have a single bond or an unsaturated bond, and an aromatic structure having 6 to 20 carbon atoms. A divalent substituent selected from the group consisting of groups is preferred.
X1、およびY1における「炭素数6~20の芳香族構造を有する有機基」は、前記「不飽和結合を有していてもよい炭素数1~10の脂肪族基」と前記「芳香族構造」とが相互に結合して形成された2価の置換基であってもよい。 The “organic group having an aromatic structure having 6 to 20 carbon atoms” in X 1 and Y 1 may have 6 to 14 carbon atoms, 6 to 12 carbon atoms, It may be 6 to 9 or may have 6 to 8 carbon atoms. Examples of the “aromatic structure” include a phenylene group, a biphenyldiyl group, and a naphthalenediyl group, and among these, a phenylene group is preferable.
The “organic group having an aromatic structure having 6 to 20 carbon atoms” in X 1 and Y 1 is the above “aliphatic group having 1 to 10 carbon atoms which may have an unsaturated bond” and the above “aromatic group”. It may be a divalent substituent formed by bonding the “group structure” to each other.
R11'、R12'、R11"およびR12"は、それぞれ独立して、水酸基、ハロゲン原子、カルボキシル基、炭素数1~20の飽和または不飽和のアルキル基、炭素数1~20のアルキルエーテル基、炭素数3~20の飽和または不飽和の脂環式基、または炭素数6~20の芳香族構造を有する有機基からなる群から選ばれる1価の置換基であり、これらはエステル結合、エーテル結合、アミド結合、カルボニル結合を介して結合していてもよく、
p、およびqは、それぞれ独立して、0~3の整数であり、
X1'、Y1'、X1"およびY1"は、それぞれ独立して、単結合、または不飽和結合を有していてもよい炭素数1~10の脂肪族基、炭素数3~20の脂環式基、および炭素数6~20の芳香族構造を有する有機基からなる群から選ばれる2価の置換基である。
フェノール樹脂(A)の上記構造は、用いるビフェノール化合物と、重合性化合物の種類から当業者に理解され得る。 The resin having a repeating unit structure represented by the formula (2) can be, for example, a resin having a structure represented by the formula (3).
R 11 ′ , R 12 ′ , R 11 ″ and R 12 ″ each independently represent a hydroxyl group, a halogen atom, a carboxyl group, a saturated or unsaturated alkyl group having 1 to 20 carbon atoms, or a C 1 to 20 carbon atom. A monovalent substituent selected from the group consisting of an alkyl ether group, a saturated or unsaturated alicyclic group having 3 to 20 carbon atoms, or an organic group having an aromatic structure having 6 to 20 carbon atoms, It may be bonded via an ester bond, an ether bond, an amide bond or a carbonyl bond,
p and q are each independently an integer of 0 to 3,
X 1 ′ , Y 1 ′ , X 1 ″ and Y 1 ″ each independently represent an aliphatic group having 1 to 10 carbon atoms which may have a single bond or an unsaturated bond, A divalent substituent selected from the group consisting of 20 alicyclic groups and organic groups having an aromatic structure having 6 to 20 carbon atoms.
The above structure of the phenol resin (A) can be understood by those skilled in the art from the type of the biphenol compound and the polymerizable compound used.
本実施形態の感光性樹脂組成物は、紫外線、電子線、X線をはじめとする放射線に感応して樹脂パターンを形成できる組成物であれば、特に限定されるものではなく、ネガ型、ポジ型のいずれの感光性樹脂組成物であってもよい。光酸発生剤(B)を含有することにより感光性を備える本実施形態の樹脂組成物は、例えば、半導体装置の製造に用いられるレジストとして使用することができる。 (Photoacid generator (B))
The photosensitive resin composition of the present embodiment is not particularly limited as long as it is a composition capable of forming a resin pattern in response to radiation including ultraviolet rays, electron beams, and X-rays. Any type of photosensitive resin composition may be used. The resin composition of this embodiment having photosensitivity by containing the photoacid generator (B) can be used, for example, as a resist used for manufacturing a semiconductor device.
本実施形態の感光性樹脂組成物は、上記成分を溶剤に溶解して得られるワニスの形態で使用される。用いられる溶剤としては、N-メチル-2-ピロリドン、γ-ブチロラクトン、N,N-ジメチルアセトアミド、ジメチルスルホキシド、ジエチレングリコールジメチルエーテル、ジエチレングリコールジエチルエーテル、ジエチレングリコールジブチルエーテル、プロピレングリコールモノメチルエーテル、ジプロピレングリコールモノメチルエーテル、プロピレングリコールモノメチルエーテルアセテート、乳酸メチル、乳酸エチル、乳酸ブチル、メチル-1,3-ブチレングリコールアセテート、1,3-ブチレングリコール-3-モノメチルエーテル、ピルビン酸メチル、ピルビン酸エチル及びメチル-3-メトキシプロピオネート等が挙げられ、単独でも混合して用いてもよい。 (solvent)
The photosensitive resin composition of this embodiment is used in the form of a varnish obtained by dissolving the above components in a solvent. Solvents used include N-methyl-2-pyrrolidone, γ-butyrolactone, N, N-dimethylacetamide, dimethyl sulfoxide, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol dibutyl ether, propylene glycol monomethyl ether, dipropylene glycol monomethyl ether, Propylene glycol monomethyl ether acetate, methyl lactate, ethyl lactate, butyl lactate, methyl-1,3-butylene glycol acetate, 1,3-butylene glycol-3-monomethyl ether, methyl pyruvate, ethyl pyruvate and methyl-3-methoxy Propionate etc. are mentioned, You may use individually or in mixture.
本実施形態の感光性樹脂組成物は、上記フェノール樹脂(A)と反応可能な基を有する架橋剤(C)を含んでもよい。架橋剤(C)を含む本実施形態の感光性樹脂組成物を用いて樹脂膜を作製し、これを露光、現像によりパターニングした後に加熱硬化する場合、この架橋剤(C)は、光酸発生剤(B)から発生した酸、または熱の作用により、フェノール樹脂(A)と架橋する。架橋剤を含む感光性樹脂組成物から得られる樹脂膜は、上述の構造を有するフェノール樹脂(A)を含むことにより、加熱硬化時におけるパターン形成された樹脂膜の変形が抑制される。また、得られた硬化膜は優れた耐熱性、電気特性および機械特性を有するため、半導体装置に用いられる表面保護膜および層間絶縁膜として使用することができる。 (Crosslinking agent (C))
The photosensitive resin composition of this embodiment may contain the crosslinking agent (C) which has a group which can react with the said phenol resin (A). When a resin film is prepared using the photosensitive resin composition of the present embodiment containing a cross-linking agent (C), patterned by exposure and development, and then cured by heating, the cross-linking agent (C) generates photoacid. It crosslinks with the phenol resin (A) by the action of acid generated from the agent (B) or heat. When the resin film obtained from the photosensitive resin composition containing the crosslinking agent contains the phenol resin (A) having the above-described structure, deformation of the patterned resin film during heat curing is suppressed. Further, since the obtained cured film has excellent heat resistance, electrical characteristics, and mechanical characteristics, it can be used as a surface protective film and an interlayer insulating film used in a semiconductor device.
(1)メチロール基、及びアルコキシメチル基から成る群より選択される1種以上の架橋性基を含有する化合物:たとえば、ベンゼンジメタノール、ビス(ヒドロキシメチル)クレゾール、ビス(ヒドロキシメチル)ジメトキシベンゼン、ビス(ヒドロキシメチル)ジフェニルエーテル、ビス(ヒドロキシメチル)ベンゾフェノン、ヒドロキシメチル安息香酸ヒドロキシメチルフェニル、ビス(ヒドロキシメチル)ビフェニル、ジメチルビス(ヒドロキシメチル)ビフェニル、ビス(メトキシメチル)ベンゼン、ビス(メトキシメチル)クレゾール、ビス(メトキシメチル)ジメトキシベンゼン、ビス(メトキシメチル)ジフェニルエーテル、ビス(メトキシメチル)ベンゾフェノン、メトキシメチル安息香酸メトキシメチルフェニル、ビス(メトキシメチル)ビフェニル、ジメチルビス(メトキシメチル)ビフェニル;商業的商品としては、サイメル300、301、303、370、325、327、701、266、267、238、1141、272、202、1156、1158、1123、1170、1174、UFR65、300(三井サイテック(株)製)、ニカラックMX-270、-280、-290、ニカラックMS―11、ニカラックMW―30、-100、-300、-390、-750(三和ケミカル社製)、1,4-ビス(メトキシメチル)ベンゼン、4,4'-ビフェニルジメタノール、4,4'-ビス(メトキシメチル)ビフェニル、市販されている26DMPC、46DMOC、DM-BIPC-F、DM-BIOC-F、TM-BIP-A(旭有機材工業(株)製)、DML-MBPC、DML-MBOC、DML-OCHP、DML-PC、DML-PCHP、DML-PTBP、DML-34X、DML-EP、DML-POP、DML-OC、ジメチロール-Bis-C、ジメチロール-BisOC-P、DML-BisOC-Z、DML-BisOCHP-Z、DML-PFP、DML-PSBP、DML-MB25、DML-MTrisPC、DML-Bis25X-34XL、DML-Bis25X-PCHP、2,6-ジメトキシメチル-4-t-ブチルフェノール、2,6-ジメトキシメチル-p-クレゾール、2,6-ジアセトキシメル-p-クレゾール、TriML-P、TriML-35XL、TriML-TrisCR-HAP、HML-TPPHBA、HML-TPHAP、HMOM-TPPHBA、HMOM-TPHAP(本州化学工業(株)製)等が挙げられる。これらの化合物は単独で又は混合して使用することができる。
(2)エポキシ基を有する化合物:たとえば、n-ブチルグリシジルエーテル、2-エトキシヘキシルグリシジルエーテル、フェニルグリシジルエーテル、アリルグリシジルエーテル、エチレングリコールジグリシジルエーテル、プロピレングリコールジグリシジルエーテル、ネオペンチルグリコールジグリシジルエーテル、グリセロールポリグリシジルエーテル、ソルビトールポリグリシジルエーテル、ビスフェノールA(又はF)のグリシジルエーテル等のグリシジルエーテル、アジピン酸ジグリシジルエステル、o-フタル酸ジグリシジルエステル等のグリシジルエステル、3,4-エポキシシクロヘキシルメチル(3,4-エポキシシクロヘキサン)カルボキシレート、3,4-エポキシ-6-メチルシクロヘキシルメチル(3,4-エポキシ-6-メチルシクロヘキサン)カルボキシレート、ビス(3,4-エポキシ-6-メチルシクロヘキシルメチル)アジペート、ジシクロペンタンジエンオキサイド、ビス(2,3-エポキシシクロペンチル)エーテルや、(株)ダイセル製のセロキサイド2021、セロキサイド2081、セロキサイド2083、セロキサイド2085、セロキサイド8000、エポリードGT401などの脂環式エポキシ、2,2'-(((((1-(4-(2-(4-(オキシラン-2-イルメトキシ)フェニル)プロパン-2-イル)フェニル)エタン-1,1-ジイル)ビス(4,1-フェニレン))ビス(オキシ))ビス(メチレン))ビス(オキシラン))(たとえば、Techmore VG3101L((株)プリンテック製))、エポライト100MF(共栄社化学工業(株)製)、エピオールTMP(日油(株)製)などの脂肪族ポリグリシジルエーテル、1,1,3,3,5,5-ヘキサメチル-1,5-ビス(3-(オキシラン-2-イルメトキシ)プロピル)トリ・シロキサン(たとえば、DMS-E09(ゲレスト社製));
(3)イソシアネート基を有する化合物:たとえば、4,4'-ジフェニルメタンジイソシアネート、トリレンジイソシアナート、1,3-フェニレンビスメチレンジイソシアネート、ジシクロヘキシルメタン―4,4'-ジイソシアネート、イソホロンジイソシアネート、ヘキサメチレンジイソシアネート;
(4)ビスマレイミド基を有する化合物:たとえば、4,4'-ジフェニルメタンビスマレイミド、フェニルメタンマレイミド、m-フェニレンビスマレイミド、ビスフェノールAジフェニルエーテルビスマレイミド、3,3'-ジメチル-5,5'-ジエチル-4,4'-ジフェニルメタンビスマレイミド、4-メチル-1,3-フェニレンビスマレイミド、1,6'-ビスマレイミド-(2,2,4-トリメチル)ヘキサン、4,4'-ジフェニルエーテルビスマレイミド、4,4'-ジフェニルスルフォンビスマレイミド、1,3-ビス(3-マレイミドフェノキシ)ベンゼン、1,3-ビス(4-マレイミドフェノキシ)ベンゼン。 As the crosslinking agent (C) that can be used in the photosensitive resin composition of the present embodiment, it is preferable to use a compound that can be thermally crosslinked with the phenol resin (A). Crosslinkers (C) that can be used include the following compounds:
(1) A compound containing one or more crosslinkable groups selected from the group consisting of a methylol group and an alkoxymethyl group: for example, benzenedimethanol, bis (hydroxymethyl) cresol, bis (hydroxymethyl) dimethoxybenzene, Bis (hydroxymethyl) diphenyl ether, bis (hydroxymethyl) benzophenone, hydroxymethylphenyl hydroxymethylbenzoate, bis (hydroxymethyl) biphenyl, dimethylbis (hydroxymethyl) biphenyl, bis (methoxymethyl) benzene, bis (methoxymethyl) cresol Bis (methoxymethyl) dimethoxybenzene, bis (methoxymethyl) diphenyl ether, bis (methoxymethyl) benzophenone, methoxymethylphenyl methoxymethylbenzoate, bis Methoxymethyl) biphenyl, dimethylbis (methoxymethyl) biphenyl; commercial products include Cymel 300, 301, 303, 370, 325, 327, 701, 266, 267, 238, 1141, 272, 202, 1156, 1158, 1123, 1170, 1174, UFR65, 300 (Mitsui Cytec Co., Ltd.), Nikarac MX-270, -280, -290, Nikalac MS-11, Nikalac MW-30, -100, -300, -390, -750 (Manufactured by Sanwa Chemical Co., Ltd.), 1,4-bis (methoxymethyl) benzene, 4,4′-biphenyldimethanol, 4,4′-bis (methoxymethyl) biphenyl, commercially available 26DMPC, 46DMOC, DM- BIPC-F, DM-BIOC-F, TM-BIP-A (Asahi Organic Materials Industry Co., Ltd.), DML-MBPC, DML-MBOC, DML-OCHP, DML-PC, DML-PCHP, DML-PTBP, DML-34X, DML-EP, DML-POP, DML-OC, dimethylol -Bis-C, dimethylol-BisOC-P, DML-BisOC-Z, DML-BisOCHP-Z, DML-PFP, DML-PSBP, DML-MB25, DML-MTrisPC, DML-Bis25X-34XL, DML-Bis25X-PCHP 2,6-dimethoxymethyl-4-t-butylphenol, 2,6-dimethoxymethyl-p-cresol, 2,6-diacetoxymer-p-cresol, TriML-P, TriML-35XL, TriML-TrisCR-HAP , HML-TPPHBA, H L-TPHAP, HMOM-TPPHBA, HMOM-TPHAP (manufactured by Honshu Chemical Industry Co.) and the like. These compounds can be used alone or in combination.
(2) Compounds having an epoxy group: for example, n-butyl glycidyl ether, 2-ethoxyhexyl glycidyl ether, phenyl glycidyl ether, allyl glycidyl ether, ethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, neopentyl glycol diglycidyl ether Glycerol polyglycidyl ether, sorbitol polyglycidyl ether, glycidyl ether such as glycidyl ether of bisphenol A (or F), glycidyl ester such as adipic acid diglycidyl ester, o-phthalic acid diglycidyl ester, 3,4-epoxycyclohexylmethyl (3,4-epoxycyclohexane) carboxylate, 3,4-epoxy-6-methylcyclohexylmethyl (3,4 Epoxy-6-methylcyclohexane) carboxylate, bis (3,4-epoxy-6-methylcyclohexylmethyl) adipate, dicyclopentanediene oxide, bis (2,3-epoxycyclopentyl) ether, manufactured by Daicel Corporation An alicyclic epoxy such as Celoxide 2021, Celoxide 2081, Celoxide 2083, Celoxide 2085, Celoxide 8000, Epolide GT401, 2,2 ′-(((((1- (4- (2- (4- (oxirane-2- (Ilmethoxy) phenyl) propan-2-yl) phenyl) ethane-1,1-diyl) bis (4,1-phenylene)) bis (oxy)) bis (methylene)) bis (oxirane)) (eg Techmore VG3101L ( (Made by Printec Co., Ltd.)) Aliphatic polyglycidyl ether such as Epolite 100MF (manufactured by Kyoeisha Chemical Industry Co., Ltd.), Epiol TMP (manufactured by NOF Corporation), 1,1,3,3,5,5-hexamethyl-1,5-bis ( 3- (oxiran-2-ylmethoxy) propyl) trisiloxane (eg, DMS-E09 (Gerest));
(3) Compounds having an isocyanate group: for example, 4,4′-diphenylmethane diisocyanate, tolylene diisocyanate, 1,3-phenylene bismethylene diisocyanate, dicyclohexylmethane-4,4′-diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate;
(4) Compounds having a bismaleimide group: for example, 4,4′-diphenylmethane bismaleimide, phenylmethane maleimide, m-phenylene bismaleimide, bisphenol A diphenyl ether bismaleimide, 3,3′-dimethyl-5,5′-diethyl -4,4'-diphenylmethane bismaleimide, 4-methyl-1,3-phenylene bismaleimide, 1,6'-bismaleimide- (2,2,4-trimethyl) hexane, 4,4'-diphenyl ether bismaleimide, 4,4′-diphenylsulfone bismaleimide, 1,3-bis (3-maleimidophenoxy) benzene, 1,3-bis (4-maleimidophenoxy) benzene.
本実施形態の感光性樹脂組成物は、シランカップリング剤(D)を含んでもよい。シランカップリング剤(D)を含むことにより、前記感光性樹脂組成物を基材上に塗布して樹脂膜を得る際、基材への密着性が向上する。 (Silane coupling agent (D))
The photosensitive resin composition of this embodiment may contain a silane coupling agent (D). By including the silane coupling agent (D), when the photosensitive resin composition is applied onto the substrate to obtain a resin film, the adhesion to the substrate is improved.
本実施形態の感光性樹脂組成物は、非イオン性界面活性剤(E)を含んでもよい。非イオン性界面活性剤(E)を含むことにより、前記感光性樹脂組成物を基材上に塗布して樹脂膜を得る際の塗布性が良好となり、均一な厚みの塗布膜を得ることができる。また、塗布膜を現像する際の残渣やパターン浮き上がりを防止することができる。 (Nonionic surfactant (E))
The photosensitive resin composition of this embodiment may contain a nonionic surfactant (E). By including the nonionic surfactant (E), the coating property when the photosensitive resin composition is applied onto a substrate to obtain a resin film is improved, and a coating film having a uniform thickness can be obtained. it can. Further, it is possible to prevent residues and pattern floating when the coating film is developed.
本実施形態の感光性樹脂組成物は、反応促進剤(F)を含んでもよい。反応促進剤(F)を含むことにより、感光性樹脂組成物に含まれるフェノール樹脂(A)と架橋剤との熱架橋を促進することができる。 (Reaction accelerator (F))
The photosensitive resin composition of this embodiment may contain a reaction accelerator (F). By including the reaction accelerator (F), thermal crosslinking between the phenol resin (A) and the crosslinking agent contained in the photosensitive resin composition can be promoted.
本実施形態の感光性樹脂組成物には、必要に応じて、溶解促進剤、酸化防止剤、フィラー、光重合開始剤、末端封止剤および増感剤等の添加物を、本発明の効果を損なわない範囲でさらに用いてもよい。 (Other additives)
In the photosensitive resin composition of the present embodiment, additives such as a dissolution accelerator, an antioxidant, a filler, a photopolymerization initiator, a terminal blocker, and a sensitizer are added to the photosensitive resin composition as necessary. You may use further in the range which does not impair.
本実施形態の別の態様は、以下の工程:
半導体基板上に、上述の本発明の感光性樹脂組成物を塗布する工程、
前記感光性樹脂組成物を加熱乾燥して、感光性樹脂層を得る工程、
前記感光性樹脂層を活性光線で露光する工程、
前記露光された感光性樹脂層を現像して、パターニングされた樹脂層を得る工程、および
前記パターニングされた樹脂層を加熱して、硬化樹脂層を得る工程、
を含む、半導体装置の製造方法を提供する。本実施形態の一例を以下に説明する。 (Method for producing cured film)
Another aspect of this embodiment includes the following steps:
A step of applying the above-described photosensitive resin composition of the present invention on a semiconductor substrate;
A step of heating and drying the photosensitive resin composition to obtain a photosensitive resin layer;
Exposing the photosensitive resin layer with actinic rays;
Developing the exposed photosensitive resin layer to obtain a patterned resin layer; and heating the patterned resin layer to obtain a cured resin layer;
A method for manufacturing a semiconductor device is provided. An example of this embodiment will be described below.
先ず、本実施形態の感光性樹脂組成物を、支持体又は基板、例えばシリコンウエハー、セラミック基板、アルミ基板、SiCウェハ、GaNウェハなどに塗布する。ここで、基板は、未加工の基板以外に、例えば半導体素子または表示体素子が表面に形成された基板も含む。この時、形成するパターンと支持体との耐水接着性を確保するため、予め支持体又は基板にシランカップリング剤などの接着助剤を塗布しておいてもよい。感光性樹脂組成物の塗布はスピンナーを用いた回転塗布、スプレーコーターを用いた噴霧塗布、浸漬、印刷、ロールコーティングなどにより行うことができる。 (Formation method of coating film)
First, the photosensitive resin composition of the present embodiment is applied to a support or a substrate such as a silicon wafer, a ceramic substrate, an aluminum substrate, a SiC wafer, or a GaN wafer. Here, the substrate includes, in addition to an unprocessed substrate, for example, a substrate on which a semiconductor element or a display element is formed. At this time, in order to ensure water-resistant adhesion between the pattern to be formed and the support, an adhesion assistant such as a silane coupling agent may be applied to the support or the substrate in advance. The photosensitive resin composition can be applied by spin coating using a spinner, spray coating using a spray coater, dipping, printing, roll coating, or the like.
次に、前記のようにして得られた塗膜を露光する。露光用の活性光線としては、例えばX線、電子線、紫外線、可視光線などが使用できるが、200~500nmの波長のものが好ましい。パターンの解像度、及び取り扱い性の点で、光源波長は水銀ランプのg線、h線又はi線の領域であることが好ましく、単独でも2つ以上の光線を混合して用いてもよい。露光装置としては、コンタクトアライナー、ミラープロジェクション又はステッパ-が特に好ましい。露光後、必要に応じて、80~140℃において10~300秒程度、塗膜を再度加熱してもよい。 (Exposure process)
Next, the coating film obtained as described above is exposed. As the actinic ray for exposure, for example, X-ray, electron beam, ultraviolet ray, visible ray and the like can be used, but those having a wavelength of 200 to 500 nm are preferable. From the viewpoint of pattern resolution and handleability, the light source wavelength is preferably in the g-line, h-line or i-line region of the mercury lamp, and may be used alone or in combination with two or more light beams. As the exposure apparatus, a contact aligner, mirror projection or stepper is particularly preferable. After the exposure, if necessary, the coating film may be heated again at 80 to 140 ° C. for about 10 to 300 seconds.
次に、前記露光後の塗膜を現像して、レリーフパターンを形成する。この現像工程においては、適切な現像液を用いて、例えば浸漬法、パドル法、回転スプレー法などの方法を用いて現像を行うことができる。現像により、塗膜から、露光部(ポジ型の場合)又は未露光部(ネガ型の場合)が溶出除去され、レリーフパターンを得ることができる。 (Development process)
Next, the exposed coating film is developed to form a relief pattern. In this development step, development can be performed using a suitable developer, for example, by a method such as an immersion method, a paddle method, or a rotary spray method. By developing, the exposed portion (in the case of positive type) or the unexposed portion (in the case of negative type) is eluted and removed from the coating film, and a relief pattern can be obtained.
エチルアミン、ジエチルアミン、トリエチルアミン、トリエタノールアミンなどの有機アミン類;
テトラメチルアンモニウムヒドロキシド、テトラブチルアンモニウムヒドロキシドなどの4級アンモニウム塩類などの水溶液;
シクロペンタノン、プロピレングリコールモノメチルエーテル、プロピレングリコールモノメチルエーテルアセテートなどの有機溶剤、を用いることができ、これらには、例えばメタノール、エタノールなどの水溶性有機溶媒、又は界面活性剤が添加されていてもよい。
これらの中で、テトラメチルアンモニウムヒドロキシド水溶液が好ましい。前記水溶液におけるテトラメチルアンモニウムヒドロキシドの濃度は、好ましくは0.5~10質量%であり、更に好ましくは1~5質量%である。 Examples of the developer include inorganic alkalis such as sodium hydroxide, sodium carbonate, sodium silicate, and ammonia;
Organic amines such as ethylamine, diethylamine, triethylamine, triethanolamine;
Aqueous solutions of quaternary ammonium salts such as tetramethylammonium hydroxide and tetrabutylammonium hydroxide;
Organic solvents such as cyclopentanone, propylene glycol monomethyl ether, and propylene glycol monomethyl ether acetate can be used, and water-soluble organic solvents such as methanol and ethanol, or surfactants may be added to these. Good.
Among these, tetramethylammonium hydroxide aqueous solution is preferable. The concentration of tetramethylammonium hydroxide in the aqueous solution is preferably 0.5 to 10% by mass, more preferably 1 to 5% by mass.
最後に、前記のようにして得られたレリーフパターンを加熱することにより、硬化レリーフパターン(硬化膜)を得ることができる。加熱温度は150℃~500℃が好ましく、150℃~400℃がより好ましい。加熱時間は、15~300分とすることができる。この加熱処理は、ホットプレート、オーブン、温度プログラムを設定できる昇温式オーブンなどにより行うことが出来る。加熱処理を行う際の雰囲気気体としては、空気を用いてもよく、窒素、アルゴンなどの不活性ガスを用いることもできる。また、より低温にて熱処理を行う必要がある場合には、真空ポンプなどを利用して減圧下に加熱を行ってもよい。
本実施形態の感光性樹脂組成物から得られるレリーフパターンは、加熱工程における変形がほとんどまたは全くなく、加熱前のレリーフパターンの形状が維持され、高解像度の硬化レリーフパターンを得ることができる。 (Heating process)
Finally, a relief pattern (cured film) can be obtained by heating the relief pattern obtained as described above. The heating temperature is preferably 150 ° C. to 500 ° C., more preferably 150 ° C. to 400 ° C. The heating time can be 15 to 300 minutes. This heat treatment can be performed by a hot plate, an oven, a temperature rising oven in which a temperature program can be set, or the like. As an atmospheric gas at the time of heat treatment, air may be used, or an inert gas such as nitrogen or argon may be used. In addition, when it is necessary to perform heat treatment at a lower temperature, heating may be performed under reduced pressure using a vacuum pump or the like.
The relief pattern obtained from the photosensitive resin composition of the present embodiment has little or no deformation in the heating step, maintains the shape of the relief pattern before heating, and can obtain a high-resolution cured relief pattern.
上述の硬化レリーフパターンを、表面保護膜、層間絶縁膜、再配線用絶縁膜、フリップチップ装置用保護膜、バンプ構造を有する装置の保護膜として用い、さらに、公知の半導体装置の製造方法における工程と組み合わせることで、半導体装置を製造することができる。上述のように、本実施形態の硬化レリーフパターンは高解像度で作製することが可能であるため、これを用いた半導体装置は電気的信頼性に優れる。 (Semiconductor device)
The above-described cured relief pattern is used as a surface protective film, an interlayer insulating film, a rewiring insulating film, a protective film for a flip chip device, a protective film for a device having a bump structure, and a process in a known method for manufacturing a semiconductor device By combining with, a semiconductor device can be manufactured. As described above, since the cured relief pattern of this embodiment can be produced with high resolution, a semiconductor device using the cured relief pattern is excellent in electrical reliability.
<フェノール樹脂(A-1)の合成>
温度計、攪拌機、原料投入口および乾燥窒素ガス導入管を備えた4つ口のガラス製丸底フラスコ内に、4,4'-ビフェノール186.2g(1.00mol)と、2,6-ビス(ヒドロキシメチル)-p-クレゾール134.6g(0.8mol)とシュウ酸・二水和物6.3g(0.05mol)と、327gのγ-ブチロラクトンとを仕込んだ後、窒素を流しながらかかる丸底フラスコを、油浴中で反応液を還流させながら100℃で6時間の重縮合反応を行った。次に、得られた反応液を室温まで冷却した後、436gのアセトンを添加し均一になるまで撹拌混合した。その後、丸底フラスコ内にある反応液を水10Lに滴下混合することにより、樹脂成分を析出させた。次に、析出した樹脂成分を濾別して回収した後、60℃での真空乾燥を行い、下記式(A-1)で表されるフェノール樹脂を得た。得られたフェノール樹脂(A-1)の重量平均分子量は、9,800であった。
<Synthesis of phenol resin (A-1)>
In a 4-neck glass round bottom flask equipped with a thermometer, stirrer, raw material inlet and dry nitrogen gas inlet tube, 186.2 g (1.00 mol) of 4,4′-biphenol and 2,6-bis After charging 134.6 g (0.8 mol) of (hydroxymethyl) -p-cresol, 6.3 g (0.05 mol) of oxalic acid dihydrate, and 327 g of γ-butyrolactone, it is applied while flowing nitrogen. The round bottom flask was subjected to a polycondensation reaction at 100 ° C. for 6 hours while refluxing the reaction solution in an oil bath. Next, after cooling the obtained reaction liquid to room temperature, 436 g of acetone was added and stirred and mixed until uniform. Then, the resin component was deposited by dripping and mixing the reaction liquid in a round bottom flask to 10 L of water. Next, the precipitated resin component was collected by filtration and then vacuum dried at 60 ° C. to obtain a phenol resin represented by the following formula (A-1). The obtained phenol resin (A-1) had a weight average molecular weight of 9,800.
<フェノール樹脂(A-2)の合成>
温度計、攪拌機、原料投入口および乾燥窒素ガス導入管を備えた4つ口のガラス製丸底フラスコ内に、4,4'-ビフェノール186.2g(1.00mol)と、1,4-ビス(メトキシメチル)ベンゼン133.0g(0.8mol)と、硫酸ジエチル7.7g(0.05mol)と、327gのγ-ブチロラクトンとを仕込んだ後、窒素を流しながらかかる丸底フラスコを、油浴中で反応液を還流させながら100℃で6時間の重縮合反応を行った。次に、得られた反応液を室温まで冷却した後、436gのアセトンを添加し均一になるまで撹拌混合した。その後、丸底フラスコ内にある反応液を水10Lに滴下混合することにより、樹脂成分を析出させた。次に、析出した樹脂成分を濾別して回収した後、60℃での真空乾燥を行うことにより、下記式(A-2)で表されるフェノール樹脂を得た。得られたフェノール樹脂(A-2)の重量平均分子量は、12,300であった。
<Synthesis of phenol resin (A-2)>
In a four-necked glass round bottom flask equipped with a thermometer, stirrer, raw material inlet and dry nitrogen gas inlet tube, 186.2 g (1.00 mol) of 4,4′-biphenol and 1,4-bis After charging 133.0 g (0.8 mol) of (methoxymethyl) benzene, 7.7 g (0.05 mol) of diethyl sulfate, and 327 g of γ-butyrolactone, the round bottom flask while flowing nitrogen was placed in an oil bath. The polycondensation reaction was performed at 100 ° C. for 6 hours while the reaction solution was refluxed. Next, after cooling the obtained reaction liquid to room temperature, 436 g of acetone was added and stirred and mixed until uniform. Then, the resin component was deposited by dripping and mixing the reaction liquid in a round bottom flask to 10 L of water. Next, the precipitated resin component was collected by filtration and vacuum dried at 60 ° C. to obtain a phenol resin represented by the following formula (A-2). The obtained phenol resin (A-2) had a weight average molecular weight of 12,300.
<フェノール樹脂(A-3)の合成>
温度計、攪拌機、原料投入口および乾燥窒素ガス導入管を備えた4つ口のガラス製丸底フラスコ内に、4,4'-ビフェノール186.2g(1.00mol)と、4,4'-ビス(メトキシメチル)ビフェニル193.9g(0.8mol)と、硫酸ジエチル7.7g(0.05mol)と、582gのγ-ブチロラクトンとを仕込んだ後、窒素を流しながらかかる丸底フラスコを、油浴中で反応液を還流させながら100℃で6時間の重縮合反応を行った。次に、得られた反応液を室温まで冷却した後、323gのアセトンを添加し均一になるまで撹拌混合した。その後、丸底フラスコ内にある反応液を水10Lに滴下混合することにより、樹脂成分を析出させた。次に、析出した樹脂成分を濾別して回収した後、60℃での真空乾燥を行うことにより、下記式(A-3)で表されるフェノール樹脂を得た。得られたフェノール樹脂(A-3)の重量平均分子量は、7,000であった。
<Synthesis of phenol resin (A-3)>
In a four-neck glass round bottom flask equipped with a thermometer, a stirrer, a raw material inlet and a dry nitrogen gas introduction tube, 186.2 g (1.00 mol) of 4,4′-biphenol and 4,4′- After charging 193.9 g (0.8 mol) of bis (methoxymethyl) biphenyl, 7.7 g (0.05 mol) of diethyl sulfate, and 582 g of γ-butyrolactone, the round-bottomed flask while flowing nitrogen was added to the oil A polycondensation reaction was performed at 100 ° C. for 6 hours while refluxing the reaction solution in a bath. Next, after cooling the obtained reaction liquid to room temperature, 323 g of acetone was added and stirred and mixed until uniform. Then, the resin component was deposited by dripping and mixing the reaction liquid in a round bottom flask to 10 L of water. Next, the precipitated resin component was collected by filtration, and then vacuum dried at 60 ° C. to obtain a phenol resin represented by the following formula (A-3). The obtained phenol resin (A-3) had a weight average molecular weight of 7,000.
<フェノール樹脂(A-4)の合成>
温度計、攪拌機、原料投入口および乾燥窒素ガス導入管を備えた4つ口のガラス製丸底フラスコ内に、2,2'-ビフェノール186.2g(1.00mol)と、2,6-ビス(ヒドロキシメチル)-p-クレゾール134.6g(0.8mol)とシュウ酸・二水和物6.3g(0.05mol)と、327gのγ-ブチロラクトンとを仕込んだ後、窒素を流しながらかかる丸底フラスコを、油浴中で反応液を還流させながら100℃で6時間の重縮合反応を行った。次に、得られた反応液を室温まで冷却した後、436gのアセトンを添加し均一になるまで撹拌混合した。その後、丸底フラスコ内にある反応液を水10Lに滴下混合することにより、樹脂成分を析出させた。次に、析出した樹脂成分を濾別して回収した後、60℃での真空乾燥を行うことにより、下記式(A-4)で表されるフェノール樹脂を得た。得られたフェノール樹脂(A-4)の重量平均分子量は、7,700であった。
<Synthesis of phenol resin (A-4)>
In a four-neck glass round bottom flask equipped with a thermometer, stirrer, raw material inlet and dry nitrogen gas inlet tube, 186.2 g (1.00 mol) of 2,2′-biphenol and 2,6-bis After charging 134.6 g (0.8 mol) of (hydroxymethyl) -p-cresol, 6.3 g (0.05 mol) of oxalic acid dihydrate, and 327 g of γ-butyrolactone, it is applied while flowing nitrogen. The round bottom flask was subjected to a polycondensation reaction at 100 ° C. for 6 hours while refluxing the reaction solution in an oil bath. Next, after cooling the obtained reaction liquid to room temperature, 436 g of acetone was added and stirred and mixed until uniform. Then, the resin component was deposited by dripping and mixing the reaction liquid in a round bottom flask to 10 L of water. Next, the precipitated resin component was collected by filtration and then vacuum dried at 60 ° C. to obtain a phenol resin represented by the following formula (A-4). The obtained phenol resin (A-4) had a weight average molecular weight of 7,700.
<フェノール樹脂(A-5)の合成>
温度計、攪拌機、原料投入口および乾燥窒素ガス導入管を備えた4つ口のガラス製丸底フラスコ内に、フロログルシド234.2g(1.00mol)と、1,4-ビス(メトキシメチル)ベンゼン133.0g(0.8mol)と硫酸ジエチル7.7g(0.05mol)と、375gのγ-ブチロラクトンとを仕込んだ後、窒素を流しながらかかる丸底フラスコを油浴し、反応液を還流させながら100℃で6時間の重縮合反応を行った。次に、得られた反応液を室温まで冷却した後、500gのアセトンを添加し均一になるまで撹拌混合した。その後、丸底フラスコ内にある反応液を水10Lに滴下混合することにより、樹脂成分を析出させた。次に、析出した樹脂成分を濾別して回収した後、60℃での真空乾燥を行うことにより、下記式(A-5)で表されるフェノール樹脂を得た。得られたフェノール樹脂(A-5)の重量平均分子量は、22,000であった。
<Synthesis of phenol resin (A-5)>
In a four-neck glass round bottom flask equipped with a thermometer, stirrer, raw material inlet and dry nitrogen gas inlet tube, 234.2 g (1.00 mol) of phloroglucide and 1,4-bis (methoxymethyl) benzene After charging 133.0 g (0.8 mol), diethyl sulfate 7.7 g (0.05 mol) and 375 g of γ-butyrolactone, the round bottom flask was oil bathed with nitrogen flowing, and the reaction solution was refluxed. The polycondensation reaction was carried out at 100 ° C. for 6 hours. Next, after cooling the obtained reaction liquid to room temperature, 500 g of acetone was added and stirred and mixed until uniform. Then, the resin component was deposited by dripping and mixing the reaction liquid in a round bottom flask to 10 L of water. Next, the precipitated resin component was collected by filtration and then vacuum dried at 60 ° C. to obtain a phenol resin represented by the following formula (A-5). The obtained phenol resin (A-5) had a weight average molecular weight of 22,000.
<フェノール樹脂(A-6)の合成>
温度計、攪拌機、原料投入口および乾燥窒素ガス導入管を備えた4つ口のガラス製丸底フラスコ内に、4,4'-ビフェノール186.2g(1.00mol)と、p-クレゾール86.5g(0.8mol)とホルムアルデヒド24.0g(0.8mol)とシュウ酸・2水和物11.3g(0.09mol)と、308gのγ-ブチロラクトンとを仕込んだ後、窒素を流しながらかかる丸底フラスコを、油浴中で反応液を還流させながら100℃で6時間の重縮合反応を行った。次に、得られた反応液を室温まで冷却した後、411gのアセトンを添加し均一になるまで撹拌混合した。その後、丸底フラスコ内にある反応液を水10Lに滴下混合することにより、樹脂成分を析出させた。次に、析出した樹脂成分を濾別して回収した後、60℃での真空乾燥を行うことにより、下記式(A-6)で表されるフェノール樹脂を得た。得られたフェノール樹脂(A-6)の重量平均分子量は、11,000であった。
<Synthesis of phenol resin (A-6)>
In a four-necked glass round bottom flask equipped with a thermometer, a stirrer, a raw material inlet and a dry nitrogen gas inlet tube, 186.2 g (1.00 mol) of 4,4′-biphenol and 86. 5 g (0.8 mol), formaldehyde 24.0 g (0.8 mol), oxalic acid dihydrate 11.3 g (0.09 mol), and 308 g of γ-butyrolactone were charged, and nitrogen was allowed to flow. The round bottom flask was subjected to a polycondensation reaction at 100 ° C. for 6 hours while refluxing the reaction solution in an oil bath. Next, after cooling the obtained reaction liquid to room temperature, 411 g of acetone was added and stirred and mixed until uniform. Then, the resin component was deposited by dripping and mixing the reaction liquid in a round bottom flask to 10 L of water. Next, the precipitated resin component was collected by filtration and then vacuum dried at 60 ° C. to obtain a phenol resin represented by the following formula (A-6). The obtained phenol resin (A-6) had a weight average molecular weight of 11,000.
<フェノール樹脂(A-2)の合成>
温度計、攪拌機、原料投入口および乾燥窒素ガス導入管を備えた4つ口のガラス製丸底フラスコ内に、4,4'-ビフェノール186.2g(1.00mol)と、p-キシレンジクロライド140.0g(0.8mol)と硫酸ジエチル7.7g(0.05mol)と、327gのγ-ブチロラクトンとを仕込んだ後、窒素を流しながらかかる丸底フラスコを、油浴中で反応液を還流させながら100℃で6時間の重縮合反応を行った。次に、得られた反応液を室温まで冷却した後、436gのアセトンを添加し均一になるまで撹拌混合した。その後、丸底フラスコ内にある反応液を水10Lに滴下混合することにより、樹脂成分を析出させた。次に、析出した樹脂成分を濾別して回収した後、60℃での真空乾燥を行うことにより、下記式(A-2)で表されるフェノール樹脂を得た。得られたフェノール樹脂(A-2)の重量平均分子量は、13,500であった。
<Synthesis of phenol resin (A-2)>
In a four-neck glass round bottom flask equipped with a thermometer, stirrer, raw material inlet and dry nitrogen gas inlet tube, 186.2 g (1.00 mol) of 4,4′-biphenol and p-xylene dichloride 140 After charging 0.0 g (0.8 mol), 7.7 g (0.05 mol) of diethyl sulfate and 327 g of γ-butyrolactone, the reaction solution was refluxed in an oil bath in such a round bottom flask while flowing nitrogen. The polycondensation reaction was carried out at 100 ° C. for 6 hours. Next, after cooling the obtained reaction liquid to room temperature, 436 g of acetone was added and stirred and mixed until uniform. Then, the resin component was deposited by dripping and mixing the reaction liquid in a round bottom flask to 10 L of water. Next, the precipitated resin component was collected by filtration and vacuum dried at 60 ° C. to obtain a phenol resin represented by the following formula (A-2). The obtained phenol resin (A-2) had a weight average molecular weight of 13,500.
実施例1~11および比較例1~2のそれぞれについて、以下のように感光性樹脂組成物を調製した。まず、表1に従い配合された各成分を、調合後の粘度が約500mPa・sになるようにγ-ブチロラクトン(GBL)に溶解させて窒素雰囲気下で撹拌させた後、孔径0.2μmのポリエチレン製フィルターで濾過することにより、ワニス状感光性樹脂組成物を得た。表1中における各成分の詳細は下記のとおりである。また、表1中の単位は、質量部である。 (Preparation of photosensitive resin composition)
For each of Examples 1 to 11 and Comparative Examples 1 and 2, a photosensitive resin composition was prepared as follows. First, each component blended according to Table 1 was dissolved in γ-butyrolactone (GBL) so that the viscosity after blending was about 500 mPa · s and stirred in a nitrogen atmosphere, and then polyethylene having a pore size of 0.2 μm was obtained. The varnish-like photosensitive resin composition was obtained by filtering with the filter made from. Details of each component in Table 1 are as follows. Moreover, the unit in Table 1 is a mass part.
(A-1)上記合成例1により得られたフェノール樹脂
(A-2)上記合成例2又は合成例7により得られたフェノール樹脂
(A-3)上記合成例3により得られたフェノール樹脂
(A-4)上記合成例4により得られたフェノール樹脂
(A-5)上記合成例5により得られたフェノール樹脂
(A-6)上記合成例6により得られたフェノール樹脂
(A-7)フェノールノボラック樹脂(住友ベークライト(株)製 PR-50731、ポリスチレン換算重量平均分子量(Mw)=11,000)
(A-1) Phenol resin obtained in Synthesis Example 1 (A-2) Phenol resin obtained in Synthesis Example 2 or Synthesis Example 7 (A-3) Phenol resin obtained in Synthesis Example 3 ( A-4) Phenol resin obtained in Synthesis Example 4 (A-5) Phenol resin obtained in Synthesis Example 5 (A-6) Phenol resin obtained in Synthesis Example 6 (A-7) Phenol Novolac resin (manufactured by Sumitomo Bakelite Co., Ltd. PR-50731, polystyrene equivalent weight average molecular weight (Mw) = 11,000)
(B-1)下記式(B-1)の構造のナフトキノン化合物
(B-2)下記式(B-2)の構造のナフトキノン化合物
(B-3)CPI-210S(サンアプロ(株)製)
(B-1) A naphthoquinone compound having the structure of the following formula (B-1) (B-2) A naphthoquinone compound having the structure of the following formula (B-2) (B-3) CPI-210S (manufactured by San Apro Co., Ltd.)
(C-1)ニカラックMX-270(三和ケミカル(株)製)
(C-2)TML-BPA(本州化学(株)製)
(C-3)セロキサイド2021P((株)ダイセル製)
(C-1) Nikarac MX-270 (manufactured by Sanwa Chemical Co., Ltd.)
(C-2) TML-BPA (Honshu Chemical Co., Ltd.)
(C-3) Celoxide 2021P (manufactured by Daicel Corporation)
(D-1)KBM-403(信越シリコーン(株)製)
(D-2)KBM-503(信越シリコーン(株)製)
(D-3)KBM-846(信越シリコーン(株)製)
(D-1) KBM-403 (manufactured by Shin-Etsu Silicone)
(D-2) KBM-503 (Shin-Etsu Silicone Co., Ltd.)
(D-3) KBM-846 (Shin-Etsu Silicone Co., Ltd.)
(E-1)F444(DIC(株)製) <(E) Surfactant>
(E-1) F444 (manufactured by DIC Corporation)
(F-1)サンエイド SI-150(三進化学(株)製)
(F-2)UCAT SA506(サンアプロ(株)製)
(F-1) Sun-Aid SI-150 (manufactured by Sanshin Chemical Co., Ltd.)
(F-2) UCAT SA506 (manufactured by Sun Apro)
(H-1)γ-ブチロラクトン <(H) solvent>
(H-1) γ-butyrolactone
(A-1)~(A-8)のフェノール樹脂について軟化点をJIS K 2207に従って測定した。使用した装置は、メイテック社製 ASP-M2SPであった。結果を表1に示す。最終硬化時のパターン維持性能の面から、軟化点は高い方がよい。 <Evaluation of phenolic resin-1 (measurement of softening point)>
The softening points of the phenol resins (A-1) to (A-8) were measured according to JIS K 2207. The apparatus used was ASP-M2SP manufactured by Meitec. The results are shown in Table 1. A higher softening point is better from the standpoint of pattern maintenance performance during final curing.
(A-1)から(A-8)のフェノール樹脂をガンマ-ブチロラクトンに溶解し樹脂溶液を得た。得られた溶液を4インチシリコンウエハ上にスピンコーターを用いて塗布した後、ホットプレートにて120℃で3分間プリベークし、膜厚約3μmの塗膜を得た。得られた塗布膜を23℃にて2.38%のテトラメチルアンモニウムヒドロキシド水溶液に3分間浸漬し、塗膜の溶解性を確認した。結果を表1に示す。
The phenol resins (A-1) to (A-8) were dissolved in gamma-butyrolactone to obtain a resin solution. The obtained solution was applied onto a 4-inch silicon wafer using a spin coater and then pre-baked on a hot plate at 120 ° C. for 3 minutes to obtain a coating film having a thickness of about 3 μm. The obtained coating film was immersed in a 2.38% tetramethylammonium hydroxide aqueous solution at 23 ° C. for 3 minutes to confirm the solubility of the coating film. The results are shown in Table 1.
上記で得られた感光性樹脂組成物を、それぞれ、8インチシリコンウエハ上にスピンコーターを用いて塗布した後、ホットプレートにて120℃で3分間プリベークし、膜厚約9.0μmの塗膜を得た。この塗膜に凸版印刷社製マスク(テストチャートNo.1:幅0.88~50μmの残しパターン及び抜きパターンが描かれている)を通して、i線ステッパー(ニコン社製・NSR-4425i)を用いて、露光量を変化させて照射した。
次に、現像液として2.38%のテトラメチルアンモニウムヒドロキシド水溶液を用い、プリベーク後の膜厚と現像後の膜厚の差が1.0μmになるように現像時間を調節して2回パドル現像を行うことによって露光部を溶解除去した後、純水で10秒間リンスした。100μmの正方形のビアホールのパターンが形成される最低露光量+100mJ/cm2のエネルギーで露光されたパターンにてラインパターンの解像度を評価した。結果を表2に、パターン解像度(μm)として示す。解像度は微細配線を作成する上で小さいほうがよい。 <Patterning Evaluation-1 (Examples 1-8, 10-11, and Comparative Examples 1-2)>
Each of the photosensitive resin compositions obtained above was applied onto an 8-inch silicon wafer using a spin coater and then pre-baked on a hot plate at 120 ° C. for 3 minutes to form a coating film having a thickness of about 9.0 μm. Got. An i-line stepper (Nikon Corp., NSR-4425i) was used through this coating film through a mask made by Toppan Printing Co., Ltd. (test chart No. 1: remaining pattern and blank pattern having a width of 0.88 to 50 μm are drawn). Then, irradiation was carried out while changing the exposure amount.
Next, a 2.38% tetramethylammonium hydroxide aqueous solution is used as a developing solution, and the developing time is adjusted so that the difference between the film thickness after pre-baking and the film thickness after developing is 1.0 μm, and paddle twice. The exposed portion was dissolved and removed by developing, and then rinsed with pure water for 10 seconds. The resolution of the line pattern was evaluated using a pattern exposed with an energy of a minimum exposure amount + 100 mJ / cm 2 in which a 100 μm square via hole pattern was formed. The results are shown in Table 2 as the pattern resolution (μm). The resolution should be small when creating fine wiring.
上記で得られた感光性樹脂組成物を、それぞれ、8インチシリコンウエハ上にスピンコーターを用いて塗布した後、ホットプレートにて120℃で3分間プリベークし、膜厚約9.0μmの塗膜を得た。この塗膜に凸版印刷社製マスク(テストチャートNo.1:幅0.88~50μmの残しパターン及び抜きパターンが描かれている)を通して、i線ステッパー(ニコン社製・NSR-4425i)を用いて、露光量を変化させて照射した。
次に、ホットプレートにて100℃で2分間のベーク処理を行った。次に現像液として2.38%のテトラメチルアンモニウムヒドロキシド水溶液を用い、30秒間×2回パドル現像を行うことによって露光部を溶解除去した後、純水で10秒間リンスした。5μmのラインが形成される最低露光量+100mJ/cm2のエネルギーで露光されたパターンにてラインパターンの解像度を評価した。結果を表2に、パターン解像度(μm)として示す。解像度は微細配線を作成する上で小さいほうがよい。 <Patterning evaluation-2 (Example 9)>
Each of the photosensitive resin compositions obtained above was applied onto an 8-inch silicon wafer using a spin coater and then pre-baked on a hot plate at 120 ° C. for 3 minutes to form a coating film having a thickness of about 9.0 μm. Got. An i-line stepper (Nikon Corp., NSR-4425i) was used through this coating film through a mask made by Toppan Printing Co., Ltd. (test chart No. 1: remaining pattern and blank pattern having a width of 0.88 to 50 μm are drawn). Then, irradiation was carried out while changing the exposure amount.
Next, the baking process was performed for 2 minutes at 100 degreeC with the hotplate. Next, a 2.38% tetramethylammonium hydroxide aqueous solution was used as a developing solution, and the exposed portion was dissolved and removed by performing paddle development for 30 seconds × twice, and then rinsed with pure water for 10 seconds. The resolution of the line pattern was evaluated based on the pattern exposed with the energy of the minimum exposure amount + 100 mJ / cm 2 where a 5 μm line was formed. The results are shown in Table 2 as the pattern resolution (μm). The resolution should be small when creating fine wiring.
上述のパターニング評価-1および-2で得られたパターン付きウェハを、加熱オーブンに投入し、窒素を流しながら5℃/分で室温から200℃まで昇温後、そのまま200℃で60分の加熱処理を行い、室温まで冷却した。加熱済みパターン付きウェハについて顕微鏡観察を行い、ラインの解像度を評価した。結果を表2に、硬化後解像度(μm)として示す。解像度は微細パターンを形成する上で小さいほうがよい。 <Post-curing resolution evaluation (Examples 1 to 11, Comparative Examples 1 and 2)>
The wafer with a pattern obtained in the above patterning evaluations 1 and -2 was put into a heating oven, heated from room temperature to 200 ° C. at 5 ° C./minute while flowing nitrogen, and then heated at 200 ° C. for 60 minutes. Treated and cooled to room temperature. Microscope observation was performed about the wafer with a heated pattern, and the resolution of the line was evaluated. The results are shown in Table 2 as post-curing resolution (μm). A smaller resolution is better for forming a fine pattern.
表面にアルミ回路を備えた模擬素子ウエハを用いて、実施例1~11および比較例1~2の感光性樹脂組成物を、それぞれ、最終5μmとなるよう塗布した後、パターン加工を施して硬化した。その後、チップサイズ毎に分割して16Pin DIP(Dual Inline Package)用のリードフレームに導電性ペーストを用いてマウントした後、半導体封止用エポキシ樹脂(住友ベークライト社製、EME-6300H)で封止成形して、半導体装置を作製した。
<半導体装置の信頼性評価-1(電気接続性)>
上述した方法で得られた各10個ずつの半導体装置の電気接続チェックを行い、
10個すべての半導体装置において電気接続不良がなかったものをA、
10個中1個以上の半導体装置において電気接続不良があったものをB、
として評価した。
<半導体装置の信頼性評価-2(耐湿性)>
上述した方法で得られた各10個ずつの半導体装置を、85℃/85%湿度の条件で168時間処理した後、260℃半田浴槽に10秒間浸漬し、次いで、高温、高湿のプレッシャークッカー処理(125℃、2.3atm、100%相対湿度)を施して電気接続をチェックした。
10個すべての半導体装置において電気接続不良がなかったものをA、
10個中1個以上の半導体装置において電気接続不良が観察されたものをB、
として評価した。 <Fabrication of semiconductor device>
Using the simulated element wafer having an aluminum circuit on the surface, the photosensitive resin compositions of Examples 1 to 11 and Comparative Examples 1 and 2 were each applied to a final thickness of 5 μm, and then subjected to patterning and curing. did. After that, each chip size is divided and mounted on a 16-pin DIP (Dual Inline Package) lead frame using a conductive paste, and then sealed with an epoxy resin for semiconductor encapsulation (EME-6300H, manufactured by Sumitomo Bakelite Co., Ltd.) The semiconductor device was fabricated by molding.
<Reliability evaluation of semiconductor devices-1 (Electrical connectivity)>
Conduct electrical connection check of each 10 semiconductor devices obtained by the method described above,
A in which all 10 semiconductor devices had no electrical connection failure were A,
B in which one or more of the 10 semiconductor devices had poor electrical connection
As evaluated.
<Reliability evaluation of semiconductor devices-2 (moisture resistance)>
Each of the 10 semiconductor devices obtained by the above-described method was treated for 168 hours under the condition of 85 ° C./85% humidity, then immersed in a 260 ° C. solder bath for 10 seconds, and then a high temperature, high humidity pressure cooker. Treatment (125 ° C., 2.3 atm, 100% relative humidity) was applied to check the electrical connection.
A in which all 10 semiconductor devices had no electrical connection failure were A,
B in which an electrical connection failure is observed in one or more of the 10 semiconductor devices.
As evaluated.
また、実施例のフェノール樹脂(A-1)~(A-6)を含む感光性樹脂組成物から形成される塗膜は、良好なパターニング形成性を有していた。またその硬化膜を備える半導体装置は、電気接続性の不良がなく、また高温高湿下で保存後、アルミ回路の腐食による不良は発生しなかった。そのため、前記硬化膜は、半導体装置の層間絶縁膜として有用であることが予想される。 The coating films formed from the phenol resins (A-1) to (A-6) of Examples showed good alkali solubility. In addition, the softening point of this coating film was 180 ° C. or higher. Thereby, these phenol resins are useful as resists used in the manufacture of semiconductor devices, for example.
In addition, the coating film formed from the photosensitive resin composition containing the phenol resins (A-1) to (A-6) in Examples had good patterning property. In addition, the semiconductor device provided with the cured film had no poor electrical connectivity, and no defect due to corrosion of the aluminum circuit occurred after storage under high temperature and high humidity. Therefore, the cured film is expected to be useful as an interlayer insulating film of a semiconductor device.
Claims (14)
- ビフェノール構造を有するフェノール樹脂(A)と、
光酸発生剤(B)と、
溶剤と、を含む感光性樹脂組成物。 A phenolic resin (A) having a biphenol structure;
A photoacid generator (B);
A photosensitive resin composition comprising a solvent. - 前記フェノール樹脂(A)が、ビフェノール化合物と、アルデヒド化合物、ジメチロール化合物、ジメトキシメチル化合物およびジハロアルキル化合物からなる群より選択される少なくとも1種の化合物とに由来する構造単位を有する、請求項1に記載の感光性樹脂組成物。 The phenol resin (A) has a structural unit derived from a biphenol compound and at least one compound selected from the group consisting of an aldehyde compound, a dimethylol compound, a dimethoxymethyl compound, and a dihaloalkyl compound. The photosensitive resin composition as described.
- 前記フェノール樹脂(A)が、式(1)で表される構造単位を有する樹脂である、請求項1または2に記載の感光性樹脂組成物。
R11、およびR12は、それぞれ独立して、水酸基、ハロゲン原子、カルボキシル基、炭素数1~20の飽和または不飽和のアルキル基、炭素数1~20のアルキルエーテル基、炭素数3~20の飽和または不飽和の脂環式基、または炭素数6~20の芳香族構造を有する有機基からなる群から選ばれる1価の置換基であり、これらはエステル結合、エーテル結合、アミド結合、またはカルボニル結合を介して結合していてもよく、
p、およびqは、それぞれ独立して、0~3の整数であり、
X1、およびY1は、それぞれ独立して、単結合、または不飽和結合を有していてもよい炭素数1~10の脂肪族基、炭素数3~20の脂環式基、および炭素数6~20の芳香族構造を有する有機基からなる群から選ばれる2価の置換基であり、
ただし、Y1は、2つのベンゼン環のうちいずれか一方に結合する)。 The photosensitive resin composition of Claim 1 or 2 whose said phenol resin (A) is resin which has a structural unit represented by Formula (1).
R 11 and R 12 are each independently a hydroxyl group, a halogen atom, a carboxyl group, a saturated or unsaturated alkyl group having 1 to 20 carbon atoms, an alkyl ether group having 1 to 20 carbon atoms, or 3 to 20 carbon atoms. A monovalent substituent selected from the group consisting of a saturated or unsaturated alicyclic group or an organic group having an aromatic structure having 6 to 20 carbon atoms, and these are an ester bond, an ether bond, an amide bond, Or may be bonded via a carbonyl bond,
p and q are each independently an integer of 0 to 3,
X 1 and Y 1 each independently represent a single bond or an unsaturated bond, an aliphatic group having 1 to 10 carbon atoms, an alicyclic group having 3 to 20 carbon atoms, and carbon. A divalent substituent selected from the group consisting of organic groups having an aromatic structure of several 6 to 20,
Y 1 is bonded to one of the two benzene rings). - 前記フェノール樹脂(A)が、式(2)で表される繰り返し構造単位を有する、請求項1乃至3のいずれかに記載の感光性樹脂組成物。
mは、2~10000の整数であり、
R11、およびR12は、それぞれ独立して、水酸基、ハロゲン原子、カルボキシル基、炭素数1~20の飽和または不飽和のアルキル基、炭素数1~20のアルキルエーテル基、炭素数3~20の飽和または不飽和の脂環式基、または炭素数6~20の芳香族構造を有する有機基からなる群から選ばれる1価の置換基であり、これらはエステル結合、エーテル結合、アミド結合、またはカルボニル結合を介して結合していてもよく、
p、およびqは、それぞれ独立して、0~3の整数であり、
X1、およびY1は、それぞれ独立して、単結合、または不飽和結合を有していてもよい炭素数1~10の脂肪族基、炭素数3~20の脂環式基、および炭素数6~20の芳香族構造を有する有機基からなる群から選ばれる2価の置換基であり、
ただし、Y1は、2つのベンゼン環のうちいずれか一方に結合する)。 The photosensitive resin composition in any one of Claims 1 thru | or 3 in which the said phenol resin (A) has a repeating structural unit represented by Formula (2).
m is an integer of 2 to 10,000,
R 11 and R 12 are each independently a hydroxyl group, a halogen atom, a carboxyl group, a saturated or unsaturated alkyl group having 1 to 20 carbon atoms, an alkyl ether group having 1 to 20 carbon atoms, or 3 to 20 carbon atoms. A monovalent substituent selected from the group consisting of a saturated or unsaturated alicyclic group or an organic group having an aromatic structure having 6 to 20 carbon atoms, and these are an ester bond, an ether bond, an amide bond, Or may be bonded via a carbonyl bond,
p and q are each independently an integer of 0 to 3,
X 1 and Y 1 each independently represent a single bond or an unsaturated bond, an aliphatic group having 1 to 10 carbon atoms, an alicyclic group having 3 to 20 carbon atoms, and carbon. A divalent substituent selected from the group consisting of organic groups having an aromatic structure of several 6 to 20,
Y 1 is bonded to one of the two benzene rings). - 前記光酸発生剤(B)が、200~500nmの波長の放射線の照射により酸を発生する化合物である、請求項1乃至4のいずれか一項に記載の感光性樹脂組成物。 The photosensitive resin composition according to any one of claims 1 to 4, wherein the photoacid generator (B) is a compound that generates an acid upon irradiation with radiation having a wavelength of 200 to 500 nm.
- 前記フェノール樹脂(A)と反応可能な基を有する架橋剤(C)をさらに含む、請求項1乃至5のいずれか一項に記載の感光性樹脂組成物。 The photosensitive resin composition according to any one of claims 1 to 5, further comprising a crosslinking agent (C) having a group capable of reacting with the phenol resin (A).
- 前記フェノール樹脂(A)のポリスチレン換算での重量平均分子量が1000~100000である、請求項1乃至6のいずれか一項に記載の感光性樹脂組成物。 The photosensitive resin composition according to any one of claims 1 to 6, wherein the phenol resin (A) has a weight average molecular weight in terms of polystyrene of 1,000 to 100,000.
- シランカップリング剤(D)をさらに含む、請求項1乃至7のいずれか一項に記載の感光性樹脂組成物。 The photosensitive resin composition according to claim 1, further comprising a silane coupling agent (D).
- 非イオン性界面活性剤(E)をさらに含む、請求項1乃至8のいずれか一項に記載の感光性樹脂組成物。 The photosensitive resin composition according to claim 1, further comprising a nonionic surfactant (E).
- 反応促進剤(F)をさらに含む、請求項1乃至9のいずれか一項に記載の感光性樹脂組成物。 The photosensitive resin composition according to claim 1, further comprising a reaction accelerator (F).
- 以下の工程:
半導体基板上に、請求項1乃至10のいずれか1項に記載の感光性樹脂組成物を塗布する工程、
前記感光性樹脂組成物を加熱乾燥して、感光性樹脂層を得る工程、
前記感光性樹脂層を活性光線で露光する工程、
前記露光された感光性樹脂層を現像して、パターニングされた樹脂層を得る工程、および
前記パターニングされた樹脂層を加熱して、硬化樹脂層を得る工程、
を含む、半導体装置の製造方法。 The following steps:
Applying a photosensitive resin composition according to any one of claims 1 to 10 on a semiconductor substrate;
A step of heating and drying the photosensitive resin composition to obtain a photosensitive resin layer;
Exposing the photosensitive resin layer with actinic rays;
Developing the exposed photosensitive resin layer to obtain a patterned resin layer; and heating the patterned resin layer to obtain a cured resin layer;
A method for manufacturing a semiconductor device, comprising: - 請求項1乃至10のいずれか一項に記載の感光性樹脂組成物からなる樹脂膜。 A resin film comprising the photosensitive resin composition according to any one of claims 1 to 10.
- 請求項12に記載の樹脂膜の硬化膜。 A cured film of the resin film according to claim 12.
- 請求項13に記載の硬化膜を備える半導体装置。 A semiconductor device comprising the cured film according to claim 13.
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2017
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- 2017-11-09 CN CN201780059665.1A patent/CN109791356A/en active Pending
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JP7340329B2 (en) | 2018-12-17 | 2023-09-07 | 旭化成株式会社 | Method for manufacturing photosensitive resin laminate and resist pattern |
JPWO2021241581A1 (en) * | 2020-05-29 | 2021-12-02 | ||
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WO2023182136A1 (en) * | 2022-03-24 | 2023-09-28 | 住友ベークライト株式会社 | Positive-type photosensitive resin composition, cured film, and semiconductor device |
Also Published As
Publication number | Publication date |
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JP2020187368A (en) | 2020-11-19 |
CN115718406A (en) | 2023-02-28 |
JP6489289B2 (en) | 2019-03-27 |
JP7111129B2 (en) | 2022-08-02 |
JP2019070832A (en) | 2019-05-09 |
TW201830138A (en) | 2018-08-16 |
CN109791356A (en) | 2019-05-21 |
TWI765933B (en) | 2022-06-01 |
KR20190034680A (en) | 2019-04-02 |
KR102004129B1 (en) | 2019-07-25 |
JPWO2018088469A1 (en) | 2018-11-15 |
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