WO2011055580A1 - 接着剤組成物、回路接続構造体及び半導体装置並びにガラス用接着向上剤 - Google Patents
接着剤組成物、回路接続構造体及び半導体装置並びにガラス用接着向上剤 Download PDFInfo
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- WO2011055580A1 WO2011055580A1 PCT/JP2010/063554 JP2010063554W WO2011055580A1 WO 2011055580 A1 WO2011055580 A1 WO 2011055580A1 JP 2010063554 W JP2010063554 W JP 2010063554W WO 2011055580 A1 WO2011055580 A1 WO 2011055580A1
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- Prior art keywords
- adhesive composition
- resin
- group
- circuit
- piperazine skeleton
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- 0 C*(C)(C)OC(*N1CCN(*C(O*)=O)CC1)=O Chemical compound C*(C)(C)OC(*N1CCN(*C(O*)=O)CC1)=O 0.000 description 2
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
- C03C27/06—Joining glass to glass by processes other than fusing
- C03C27/10—Joining glass to glass by processes other than fusing with the aid of adhesive specially adapted for that purpose
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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
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/0622—Polycondensates containing six-membered rings, not condensed with other rings, with nitrogen atoms as the only ring hetero atoms
- C08G73/0633—Polycondensates containing six-membered rings, not condensed with other rings, with nitrogen atoms as the only ring hetero atoms with only two nitrogen atoms in the ring
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- C08G73/1085—Polyimides with diamino moieties or tetracarboxylic segments containing heterocyclic moieties
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Definitions
- the present invention relates to an adhesive composition, a circuit connection structure, a semiconductor device, and an adhesion improver for glass.
- various adhesive compositions have been conventionally used for the purpose of bonding various members in the element.
- the properties required for the adhesive composition are diverse, including adhesiveness, heat resistance, reliability in a high temperature and high humidity state, and the like.
- the adherend used for bonding has various surface states such as printed wiring boards, organic base materials such as polyimide, metals such as copper and aluminum, ITO, IZO, SiN, and SiO 2.
- organic base materials such as polyimide
- metals such as copper and aluminum
- the adhesive composition requires a molecular design tailored to each adherend (for example, Patent Documents 1 to 3).
- the shape of the adhesive composition is a paste in which the adhesive composition is diluted with an organic solvent, or the adhesive composition is applied on a support (PET (polyethylene terephthalate) film, etc.) using a coating apparatus.
- a coating apparatus There are film-like ones prepared by applying and drying with hot air for a predetermined time. Among these, film adhesives are preferred because they are easy to handle and can be easily connected.
- the film adhesive composition is covered with PET or the like (hereinafter referred to as a cover PET film).
- a cover PET film For the purpose of avoiding contact with oxygen and moisture in the air, the film adhesive composition is covered with PET or the like (hereinafter referred to as a cover PET film).
- a release agent such as silicone
- the present invention provides an adhesive composition that can be transferred to a circuit member in a shorter time than the prior art, and has a sufficiently long pot life, and a circuit connection structure and a semiconductor device using the adhesive composition. With the goal.
- Another object of the present invention is to provide an adhesion improver for glass that has heat resistance and exhibits sufficiently good adhesion strength to glass.
- the present invention provides an adhesive composition containing a resin having a piperazine skeleton. According to such an adhesive composition, transfer to a circuit member can be performed in a shorter time than before, and the pot life can be sufficiently increased.
- the piperazine skeleton is preferably a substituted or unsubstituted bisorganopiperazine skeleton, and more preferably a substituted or unsubstituted bisalkylpiperazine skeleton.
- the bisorganopiperazine skeleton refers to a structure in which two organic groups are bonded to the nitrogen atom of the piperazine skeleton.
- a structure in which the organic group is an alkyl group is a bisalkylpiperazine skeleton.
- substituent for substituting the bisorganopiperazine skeleton include groups exemplified as R 3 below.
- Such a piperazine skeleton is preferably one represented by the following general formula (1).
- R 1 and R 2 each independently represent a divalent organic group
- R 3 represents a monovalent organic group having 1 to 10 carbon atoms, or a hydrogen atom on one of the bonds Alternatively, it represents an ether group, an ester group, a carbonyl group, a sulfonyl group, or a sulfonate group to which an organic group having 1 to 10 carbon atoms is bonded
- n represents an integer of 0 to 4.
- n 2 to 4
- a plurality of R 3 may be the same or different.
- R 3 is preferably a monovalent organic group having 1 to 10 carbon atoms, a hydroxy group, a carboxy group, or a sulfo group.
- the resin contained in the adhesive composition has such a piperazine skeleton, it can be transferred to the circuit member more reliably in a short time, and the pot life can be further increased.
- the resin having a piperazine skeleton is a polyimide composed of a repeating unit having a piperazine skeleton or a precursor thereof, and the repeating unit is a repeating unit containing 7.5% by mass or more of fluorine atoms based on the repeating unit. It is preferable that The fluorine atom content in the repeating unit is more preferably 10 to 30% by mass, and further preferably 12.5 to 25% by mass.
- the resin having a piperazine skeleton is a polyimide composed of a repeating unit having a piperazine skeleton or a precursor thereof
- the fluorine atom content is in the above range
- the moisture absorption resistance of the adhesive composition is improved.
- the adhesion tends to be difficult to decrease.
- content of a fluorine atom is such a range, while the solubility of resin to a solvent improves, the connection external appearance at the time of a circuit member connection can be made better.
- the adhesive composition of the present invention further contains conductive particles.
- electroconductivity or anisotropic conductivity can be provided to an adhesive composition, it becomes possible to use an adhesive composition suitably for the connection use etc. of the circuit members which have a circuit electrode. .
- connection resistance between the circuit electrodes electrically connected via such an adhesive composition can be sufficiently reduced.
- the adhesive composition of the present invention is preferably in the form of a film. This makes it particularly suitable as an electrical / electronic circuit connection material that is excellent in handleability and requires short-time curing characteristics.
- the present invention also provides a pair of circuit members disposed opposite to each other, and the circuit members provided between the pair of circuit members so that the circuit electrodes of the pair of circuit members are electrically connected to each other.
- the circuit connection structure is provided, wherein the connection member is made of a cured product of the adhesive composition of the present invention.
- connection member for connecting the pair of circuit members is composed of the cured product of the adhesive composition of the present invention, even if the circuit connection structure is placed in a high temperature and high humidity environment for a long time Excellent connection reliability can be obtained, and the occurrence of peeling at the interface between the adhesive and the adherend can be sufficiently suppressed.
- the present invention further includes a semiconductor element, a substrate on which the semiconductor element is mounted, and a connection member provided between the semiconductor element and the substrate, for electrically connecting and bonding the semiconductor element and the substrate.
- a semiconductor device in which the connecting member is made of a cured product of the adhesive composition of the present invention is provided.
- Such a semiconductor device is excellent even when placed in a high-temperature and high-humidity environment for a long time because the connecting member that connects the semiconductor element and the substrate is made of a cured product of the adhesive composition of the present invention. Connection reliability can be obtained, and the occurrence of peeling at the interface between the adhesive and the adherend can be sufficiently suppressed.
- the present invention provides an adhesion improver for glass comprising a resin having a piperazine skeleton.
- an adhesion improver for glass of the present invention may be used by adding to a resin or the like usually used as an adhesive, or may be used by adding to a resin constituting a substrate or the like. Further, it may be used alone as a primer.
- the adhesion improver for glass of the present invention since it contains a resin having a piperazine skeleton, it has heat resistance and can obtain sufficiently good adhesion strength to glass. It becomes possible. Further, since a resin having a piperazine skeleton is used, excellent reliability tends to be obtained as compared with the case of using a silane coupling agent.
- the resin having a piperazine skeleton contained in the adhesion improver for glass can be the same as the resin having a piperazine skeleton in the above-described adhesive composition.
- a bonding agent such as a coupling agent, an adhesion improver, and a leveling agent, a stabilizer, a filler, and the like can be added within a range where the improvement in adhesiveness is not impaired.
- Such an adhesion improver for glass preferably has a 5% weight reduction temperature of a resin having a piperazine skeleton of 150 ° C. or higher. Thereby, heat resistance can be improved, maintaining the effect of adhesiveness improvement.
- the adhesive composition which can be transferred to a circuit member in a shorter time than before, and has a sufficiently long usable time, a circuit connection structure using the adhesive composition, and a semiconductor device are provided. can do. Further, it is possible to provide an adhesion improver for glass that has heat resistance and exhibits sufficiently good adhesion strength to glass.
- FIG. 1 It is a schematic cross section which shows one Embodiment of the film adhesive composition of this invention. It is a schematic cross section which shows one Embodiment of the circuit connection structure of this invention.
- (A) is a step of laminating the film adhesive composition on the first circuit member
- (b) is a step of temporarily connecting the film adhesive composition to the first circuit member
- (c) is It is a schematic cross section which shows the process of adhere
- (meth) acrylic acid means acrylic acid or methacrylic acid corresponding thereto
- (meth) acrylate means acrylate or methacrylate corresponding thereto
- (meth) acryloyl group means acryloyl group or Means a methacryloyl group
- the adhesive composition of this embodiment is characterized by containing a resin having a piperazine skeleton.
- the “resin having a piperazine skeleton” refers to a polymer having one or more piperazine skeletons or a polymer precursor capable of generating the polymer by polymerization.
- the piperazine skeleton can be present in the main chain and / or side chain of the resin, but is preferably present in the main chain.
- the repeating unit preferably contains a fluorine atom.
- the fluorine atom may be contained in a diamine that is a raw material of a resin having a piperazine skeleton, and is a structural unit of other raw materials (for example, a structural unit composed of an acid anhydride monomer described later, a structural unit composed of a diol monomer, etc.) It may be contained in.
- the content of fluorine atoms in the repeating unit is preferably 7.5% by mass or more based on the repeating unit.
- the piperazine skeleton preferably has a structure represented by the following general formula (1).
- R 1 and R 2 each independently represent a divalent organic group
- R 3 represents a monovalent organic group having 1 to 10 carbon atoms, or a hydrogen atom on one of the bonds.
- it represents an ether group, an ester group, a carbonyl group, a sulfonyl group, or a sulfonate group to which an organic group having 1 to 10 carbon atoms is bonded.
- N represents an integer of 0 to 4.
- a hydrogen atom or an organic group having 1 to 10 carbon atoms is bonded to one of the bonds
- a hydrogen atom or an organic group having 1 to 10 carbon atoms is bonded to one of the bonds (“—” in the chemical formula). Is a monovalent group.
- R 1 and R 2 in the formula (1) include an alkylene group having 1 to 4 carbon atoms such as a methylene group, an ethylene group, a propylene group, and a butylene group, a phenyl group, an imide group, an amide group, Examples thereof include divalent organic groups such as urethane groups and ester groups.
- R 3 include monovalent organic groups such as alkyl groups having 1 to 10 carbon atoms, hydroxy groups, carboxy groups, and sulfo groups. Among these, R 1 and R 2 are preferably propylene groups.
- R 3 is preferably a methyl group.
- N in the formula (1) can be appropriately determined depending on the type of R 3 and is preferably an even number. Note that n is preferably 0.
- Examples of the resin having a piperazine skeleton represented by the general formula (1) contained in the adhesive composition include polyimide, polyamideimide, polyamide, polybenzoxazole, epoxy resin, polyester, acrylic resin, polyurethane, polyamic having a piperazine skeleton.
- Examples of the acid include polyamide, polyamideimide, polyimide, and polyamic acid having a piperazine skeleton.
- the resin having a piperazine skeleton represented by the general formula (1) is one obtained by polymerizing a monomer having the piperazine skeleton represented by the general formula (1) alone or copolymerized with another monomer. May be. A resin obtained by polycondensation or polyaddition is preferred, and a resin obtained by polycondensation is particularly preferred.
- the piperazine skeleton represented by the general formula (1) may be present in either the main chain or the side chain of the resin, but is preferably present in the main chain.
- examples of the polyimide having a piperazine skeleton include those having one or more repeating units of the following general formula (2).
- X represents a structural unit (acid anhydride monomer residue) composed of an acid anhydride monomer, and R 1 , R 2 , R 3 and n are as defined above.
- Examples of the acid anhydride monomer that forms the structural unit of X include tetracarboxylic dianhydride described below.
- the repeating unit of the polyimide having a piperazine skeleton can be represented by, for example, the following general formula (2b).
- R 100 represents a divalent organic group or a condensed ring structure in which a hydrogen atom may be substituted with halogen
- R 1 , R 2 , R 3 and n have the same meanings as described above.
- the condensed ring structure is a structure in which aromatic rings on both sides of —R 100 — are directly bonded, or a structure in which the aromatic ring forms a condensed ring with another ring (for example, another aromatic ring).
- the divalent organic group as R 100 is preferably an alkylene group having 1 to 6 carbon atoms, more preferably an alkylene group having 1 to 3 carbon atoms.
- the halogen for substituting the divalent organic group is preferably fluorine, chlorine or bromine, more preferably fluorine.
- examples of the polyamideimide having a piperazine skeleton include those having one or more repeating units of the following general formulas (3) to (5).
- R 1 , R 2 , R 3 and n are as defined above.
- Y shows the structural unit (diamine monomer residue) which consists of diamine monomers, As diamine monomer which comprises Y, the "diamine other than diamine which has a piperazine skeleton" mentioned later is mentioned. Etc.
- examples of the polyamide having a piperazine skeleton include those having one or more repeating units of the following general formulas (6) and (7).
- R 1 , R 2 , R 3 and n are as defined above.
- Y represents a structural unit (diamine monomer residue) composed of a diamine monomer, and examples of the diamine monomer constituting Y include “diamines other than diamine having a piperazine skeleton” described later.
- Z represents a dicarboxylic acid monomer (dicarboxylic acid monomer residue), and examples of the dicarboxylic acid monomer constituting Z include dicarboxylic acid described later.
- examples of the polybenzoxazole having a piperazine skeleton include those having one or more repeating units of the following general formula (8).
- W represents a tetravalent substituent containing an aromatic ring
- R 1 , R 2 , R 3 and n are as defined above.
- Examples of the tetravalent substituent containing an aromatic ring represented by W include diphenyl group, diphenyl-2,2′-propane group, diphenylsulfone group, diphenyl-2,2 ′-(1,1,1,3,3).
- An example is a tetravalent group derived from a (, 3-hexafluoropropane) group.
- examples of the epoxy resin having a piperazine skeleton include those having one or more repeating units formed from the monomer of the following general formula (9).
- R 1 , R 2 , R 3 and n are as defined above.
- polyester having a piperazine skeleton examples include those having one or more repeating units of any one of the following general formulas (10) to (12).
- Y ′ represents a structural unit (diol monomer residue) composed of a diol monomer, and examples of the diol monomer forming Y ′ include 3,3′-dihydroxydiphenyl ether, 3,4′-dihydroxy Phenyl ether, 4,4'-dihydroxydiphenyl ether, 3,3'-dihydroxyphenylmethane, 3,4'-dihydroxydiphenylmethane, 4,4'-dihydroxydiphenylmethane, bis (4-hydroxy-3,5-dimethylphenyl) methane Bis (4-hydroxy-3,5-diisopropylphenyl) methane, 3,3′-dihydroxydiphenyl sulfone, 3,4′-dihydroxydiphenyl sulfone, 4,4′-dihydroxydiphenyl sulfulfone, 4,4′-dihydroxydiphenyl sulfulfone, 4,4′-dihydroxydiphenyl
- m is a positive integer
- Me is a methyl group.
- examples of the acrylic resin having a piperazine skeleton include those having one or more repeating units formed from monomers of the following general formulas (14) and (15).
- R 1 , R 2 , R 3 and n are as defined above.
- R 4 represents a hydrogen atom, a monovalent organic group having 1 to 10 carbon atoms, a hydroxy group, a carboxyl group, or a sulfo group.
- R 5 and R 6 each independently represent a hydrogen atom or a monovalent organic group having 1 to 10 carbon atoms.
- examples of the polyurethane having a piperazine skeleton include those having one or more repeating units of the following general formula (16).
- R 1 , R 2 , R 3 and n are as defined above.
- the polyamic acid having a piperazine skeleton is a precursor of the above-described polyimide or polyamideimide (for example, the following general formulas (17) and (18)), and a polyamic acid generated as an intermediate when producing these, It can be used as a component of an adhesion improver.
- X, R 1 , R 2 , R 3 and n are as defined above.
- the resin having a piperazine skeleton as described above is, for example, polyamide, polyamideimide, polyimide or polyamic acid, it can be produced as follows.
- polyimide it can be produced, for example, by reacting a diamine having a piperazine skeleton with tetracarboxylic dianhydride, followed by dehydration and ring closure.
- polyamideimide for example, it is produced by a method in which an imide dicarboxylic acid obtained from a diamine having a piperazine skeleton and trimellitic anhydride is reacted with diisocyanate, or a method in which a diamine having a piperazine skeleton is reacted with trimellitic anhydride chloride. be able to.
- polyamide for example, a method of reacting a diamine having a piperazine skeleton with a dicarboxylic acid dihalide, or a diamine having a piperazine skeleton and a dicarboxylic acid in the presence of a condensing agent such as N, N′-dicyclohexylcarbodiimide (DCC). It can be produced by a reaction method.
- a condensing agent such as N, N′-dicyclohexylcarbodiimide (DCC).
- polyamic acid it can be produced by reacting a diamine having a piperazine skeleton with tetracarboxylic dianhydride.
- diamine having a piperazine skeleton used in the production of the polyamide, polyamideimide, polyimide or polyamic acid is easily available, 1,4-bisaminopropylpiperazine, 1,4-bisaminopropyl-2,5- It is preferable to use dimethylpiperazine.
- a diamine other than the diamine having the piperazine skeleton can be used in combination.
- the effect that physical properties, such as desirable Tg (glass transition temperature) and an elasticity modulus, can be controlled, is acquired.
- diamine compound other than the diamine having a piperazine skeleton examples include o-phenylenediamine, m-phenylenediamine, p-phenylenediamine, 3,3′-diaminodiphenyl ether, 3,4′-diaminodiphenyl ether, and 4,4′-.
- m is a positive integer
- Me is a methyl group.
- examples of the diamine compound include aliphatic diamines such as 1,3-bis (aminomethyl) cyclohexane, polyoxyalkylene diamine manufactured by Mitsui Chemicals Fine Co., Ltd. [trade names: Jeffamine D-230, D-400, D-2000, D-4000, ED-600, ED-900, ED-2001, EDR-148, etc.], 3,3′-diaminodiphenyldifluoromethane, 3,4′-diaminodiphenyldifluoromethane, 4,4 ′ -Diaminodiphenyldifluoromethane, 2,2-bis (3-aminophenyl) hexafluoropropane, 2,2- (3,4'-diaminodiphenyl) hexafluoropropane, 2,2-bis (4-aminophenyl) hexa Fluoropropane, 2,2-bis (4-aminophenoxy) pheny
- tetracarboxylic dianhydrides examples include 1,2- (ethylene) bis (trimellitic anhydride), 1,3- (trimethylene) bis (trimellitate anhydride), 1,4- (tetramethylene) bis (trimellitate).
- Anhydride 1,5- (pentamethylene) bis (trimellitic anhydride), 1,6- (hexamethylene) bis (trimellitic anhydride), 1,7- (heptamethylene) bis (trimellitic anhydride), 1 , 8- (octamethylene) bis (trimellitic anhydride), 1,9- (nonamethylene) bis (trimellitic anhydride), 1,10- (decamethylene) bis (trimellitic anhydride), 1,12- (dodecamethylene) Bis (trimellitic anhydride), 1,16- (hexadecamethylene) bis (trimellitate anhydride), 1,18 (Octadecamethylene) bis (trimellitic anhydride), pyromellitic dianhydride, 3,4: 3 ′, 4′-biphenyltetracarboxylic dianhydride, 2,3: 2 ′, 3′-biphenyltetracarboxylic Acid dianhydride, 2,2-bis (3,4-dica
- dicarboxylic acid examples include isophthalic acid, terephthalic acid, adipic acid, sebacic acid, 5-hydroxyisophthalic acid, 4-hydroxyisophthalic acid, methylene disalicylic acid, pamoic acid, 5,5′-thiodisalicylic acid and the like. be able to. One of these can be used alone, or two or more can be mixed and used. Further, the dicarboxylic acid dihalide can be produced by a general method, that is, the dicarboxylic acid using a halogenating agent such as thionyl chloride.
- the weight average molecular weight of the resin having a piperazine skeleton is preferably 5,000 to 200,000, more preferably 10,000 to 150,000. If this value is less than 5,000, the film formability tends to be inferior when used in the form of a film, and if it exceeds 200,000, the compatibility with other components tends to be poor.
- the weight average molecular weight can be measured by gel permeation chromatography (GPC) using a standard polystyrene calibration curve.
- GPC gel permeation chromatography
- the measurement apparatus and measurement conditions are as shown in Table 1 below.
- the glass transition temperature of the resin having a piperazine skeleton is preferably 50 ° C. to 250 ° C., more preferably 60 ° C. to 220 ° C. When this value is less than 50 ° C., the heat resistance of the adhesive composition tends to decrease, and when it exceeds 250 ° C., the fluidity of the adhesive composition tends to decrease.
- the content of the resin having a piperazine skeleton is preferably 1 to 60% by mass, and more preferably 2.5 to 50% by mass based on the total amount of the adhesive composition. If the content is less than 1% by mass, the transferability to the circuit member tends to deteriorate, and if it exceeds 60% by mass, the fluidity may decrease.
- the conductive particles used as necessary in the present embodiment include metal particles such as Au, Ag, Ni, Cu, and solder, and carbon particles.
- the conductive particles may be a non-conductive glass, ceramic, plastic or the like as a core, and the core is covered with the metal, metal particles, carbon or the like.
- the circuit members are deformable by heating and pressurization. Is preferable because the contact area between the conductive particles and the electrode increases and the connection reliability of the circuit is improved.
- conductive particles having a core-side protrusion formed on the surface of the core of the core since the connection reliability is further improved.
- a nucleus can be formed by adsorbing a plurality of nucleus-side projections having a smaller diameter than the nucleus in the surface of the nucleus.
- the average particle size of such conductive particles is the particle size of the entire conductive particles including the protrusions.
- the average particle diameter of the conductive particles is preferably 1 to 10 ⁇ m from the viewpoint of obtaining good dispersibility and conductivity. If the average particle size is less than 1 ⁇ m, sufficient electrical connection of the circuit cannot be obtained, and if it exceeds 10 ⁇ m, the conductive particles are not sufficiently dispersed and agglomerate.
- the height of the protrusion is preferably 50 to 500 nm, and more preferably 75 to 300 nm or less. Moreover, it is preferable that the distance between adjacent protrusion parts is 1000 nm or less, and it is more preferable that it is 500 nm or less.
- the height of the protrusion is lower than 50 nm, or when the distance between adjacent protrusions is greater than 1000 nm, the effect of the protrusion on the electrical connection tends to fade, and the height of the protrusion is greater than 500 nm. In this case, since the contact area between the conductive particles and the electrode portions of the first and second circuit members is reduced, the connection resistance value tends to increase.
- the height H of the protrusion part of electroconductive particle and the distance between adjacent protrusion parts can be measured with an electron microscope.
- the fine particles with the surface of these conductive particles coated with a polymer resin or the like suppress short circuit due to contact between particles when the amount of the conductive particles is increased, and provide insulation between circuit electrodes. Can be improved.
- covered the surface of the electroconductive particle with polymeric resin etc. can be used individually or in mixture with another electroconductive particle.
- the adhesive composition can be suitably used as an anisotropic conductive adhesive composition.
- the content of the conductive particles is preferably 0.1 to 30% by volume, more preferably 0.1 to 10% by volume based on the total volume of the adhesive composition. When this content is less than 0.1% by volume, the conductivity tends to be inferior, and when it exceeds 30% by volume, a short circuit between circuit electrodes tends to occur.
- content of electroconductive particle is determined based on the volume of each component of the adhesive composition before hardening at 23 degreeC. In addition, the volume of each component can be calculated
- the adhesive composition of the present embodiment further includes a radical polymerizable substance, a composition containing an epoxy resin and a latent curing agent for the epoxy resin (hereinafter referred to as “first composition”), heating, and the like. It is preferably a mixed composition with a composition containing a curing agent that generates free radicals (hereinafter referred to as “second composition”), or with the first composition and the second composition.
- first composition a composition containing an epoxy resin and a latent curing agent for the epoxy resin
- second composition a mixed composition with a composition containing a curing agent that generates free radicals
- the epoxy resin contained in the first composition is bisphenol A type epoxy resin, bisphenol F type epoxy resin, bisphenol S type epoxy resin, phenol novolac type epoxy resin, cresol novolac type epoxy resin, bisphenol A novolac type epoxy resin, bisphenol.
- Examples thereof include F novolac type epoxy resins, alicyclic epoxy resins, glycidyl ester type epoxy resins, glycidyl amine type epoxy resins, hydantoin type epoxy resins, isocyanurate type epoxy resins, and aliphatic chain epoxy resins. These epoxy resins may be halogenated or hydrogenated. Two or more of these epoxy resins may be used in combination.
- the latent curing agent contained in the first composition is not particularly limited as long as it can cure the epoxy resin.
- latent curing agents include anionic polymerizable catalyst-type curing agents and cationic polymerizable agents. Catalyst-type curing agents, polyaddition-type curing agents, and the like. These can be used individually by 1 type or in mixture of 2 or more types. Of these, anionic or cationic polymerizable catalyst-type curing agents are preferred because they are excellent in rapid curability and do not require chemical equivalent considerations.
- anionic or cationic polymerizable catalyst-type curing agent examples include imidazole, hydrazide, boron trifluoride-amine complex, sulfonium salt, amine imide, diaminomaleonitrile, melamine and derivatives thereof, polyamine salt, dicyandiamide and the like. These modifications can also be used.
- polyaddition type curing agent examples include polyamines, polymercaptans, polyphenols, and acid anhydrides.
- the epoxy resin is cured by heating at a medium temperature of about 160 ° C. to 200 ° C. for several tens of seconds to several hours. For this reason, the pot life is relatively long, which is preferable.
- a photosensitive onium salt an aromatic diazonium salt, an aromatic sulfonium salt or the like is mainly used
- aliphatic sulfonium salts and the like that are activated by heating to cure the epoxy resin. This type of curing agent is preferable because it has a feature of fast curing.
- the radically polymerizable substance contained in the second composition can be any known one without particular limitation.
- the radical polymerizable compound can be used in either a monomer or oligomer state, and the monomer and oligomer may be mixed and used.
- the adhesive composition of the present embodiment preferably contains at least one compound having two or more (meth) acryloyl groups in the molecule as the radical polymerizable compound.
- the adhesive composition of the present embodiment has a functional group that is polymerized by an active radical such as an allyl group, a maleimide group, and a vinyl group in addition to the compound having the (meth) acryloyl group as a radical polymerizable compound. You may add a compound suitably.
- N-vinylimidazole N-vinylpyridine, N-vinylpyrrolidone, N-vinylformamide, N-vinylcaprolactam, 4,4′-vinylidenebis (N, N-dimethylaniline), N-vinylacetamide N, N-dimethylacrylamide, N-isopropylacrylamide, N, N-diethylacrylamide, methylolacrylamide, 4,4′-diphenylmethane bismaleimide, 3,3′-dimethyl-5,5′-4,4′-diphenylmethane Examples thereof include bismaleimide and 1,6-bismaleimide- (2,2,4-trimethyl) hexane.
- radical polymerizable substance having a phosphate ester structure represented by the following general formulas (20) to (22) is preferable to use.
- a radical polymerizable substance having a phosphate ester structure represented by the following general formulas (20) to (22) is preferable to use.
- the adhesive strength to the surface of an inorganic material such as metal is improved, it is suitable for bonding circuit electrodes.
- R 4 represents a (meth) acryloyl group
- R 5 represents a hydrogen atom or a methyl group
- w and x each independently represents an integer of 1 to 8.
- R 4 s , R 5 s , w s, and x s may be the same or different.
- R 6 represents a (meth) acryloyl group
- y and z each independently represents an integer of 1 to 8.
- R 6 s , y s, and z s may be the same or different.
- R 7 represents a (meth) acryloyl group
- R 8 represents a hydrogen atom or a methyl group
- a and b each independently represents an integer of 1 to 8.
- the radical polymerizable substance having a phosphate ester structure can also be obtained by reacting anhydrous phosphoric acid with 2-hydroxyethyl (meth) acrylate.
- Specific examples include mono (2-methacryloyloxyethyl) acid phosphate and di (2-methacryloyloxyethyl) acid phosphate. These may be used alone or in combination of two or more compounds.
- the content of the radical polymerizable substance having a phosphate ester structure is preferably 0.01 to 50 parts by mass with respect to a total of 100 parts by mass of the radical polymerizable substance and the film-forming material to be blended as necessary. 0.5 to 5 parts by mass is more preferable.
- the curing agent that generates free radicals upon heating (radical polymerization initiator) contained in the second composition is a curing agent that decomposes by heating to generate free radicals, and is a conventionally known peroxide. And known compounds such as azo compounds can be used. However, from the viewpoint of stability, reactivity, and compatibility, a peroxide having a one-minute half-life temperature of 90 to 175 ° C. and a molecular weight of 180 to 1,000 is preferred.
- “one-minute half-life temperature” refers to the temperature at which the half-life is 1 minute
- “half-life” refers to the time until the concentration of the compound decreases to half of the initial value.
- radical polymerization initiators include 1,1,3,3-tetramethylbutylperoxyneodecanoate, di (4-tert-butylcyclohexyl) peroxydicarbonate, and di (2-ethylhexyl) peroxy.
- Dicarbonate cumylperoxyneodecanoate, 1,1,3,3-tetramethylbutylperoxyneodecanoate, dilauroyl peroxide, 1-cyclohexyl-1-methylethylperoxyneodecanoate, t -Hexylperoxyneodecanoate, t-butylperoxyneodecanoate, t-butylperoxypivalate, 1,1,3,3-tetramethylbutylperoxy-2-ethylhexanoate, 2, 5-Dimethyl-2,5-di (2-ethylhexanoylperoxy) hexane, t-hexyl -Oxy-2-ethylhexanoate, t-butylperoxy-2-ethylhexanoate, t-butylperoxyneoheptanoate, t-amylperoxy-2-ethylhexan
- a compound that generates radicals upon irradiation with light having a wavelength of 150 to 750 nm can be used.
- Such compounds include, for example, Photoinitiation, Photopolymerization, and Photocuring, J. MoI. -P. ⁇ -acetaminophenone derivatives and phosphine oxide derivatives described in Fouassier, Hanser Publishers (1995), p17 to p35 are more preferable because of their high sensitivity to light irradiation. These compounds may be used alone or in combination with the above peroxides or azo compounds.
- the amount of chlorine ions or organic acid contained in the radical polymerization initiator is preferably 5000 ppm or less, and further, less organic acid is generated after thermal decomposition. More preferred.
- a radical polymerization initiator having a mass retention of 20% by mass or more after being left open at room temperature and normal pressure for 24 hours.
- a stabilizer may be added to the second composition in order to control the curing rate and to provide storage stability.
- Such stabilizers include quinone derivatives such as benzoquinone and hydroquinone, phenol derivatives such as 4-methoxyphenol and 4-t-butylcatechol, 2,2,6,6-tetramethylpiperidine-1-oxyl and 4 Aminoxyl derivatives such as -hydroxy-2,2,6,6-tetramethylpiperidine-1-oxyl and hindered amine derivatives such as tetramethylpiperidyl methacrylate are preferred.
- the addition amount of the stabilizer is preferably 0.01 to 15% by mass, and more preferably 0.1 to 10% by mass based on the total amount of the adhesive composition.
- the addition amount is less than 0.01% by mass, the addition effect tends to be insufficient, and when it exceeds 15 parts by mass, the polymerization reaction tends to be inhibited.
- the adhesive composition of the present embodiment can further contain a known thermoplastic resin.
- a known thermoplastic resin polyimide resin, polyamide resin, phenoxy resin, poly (meth) acrylate resin, polyurethane resin, polyester resin, polyvinyl butyral resin, or the like can be used.
- thermoplastic resin may contain a siloxane bond or a fluorine substituent. These can be suitably used as long as the resins to be mixed are completely compatible with each other or microphase separation occurs and becomes cloudy.
- the weight average molecular weight of the thermoplastic resin is preferably 5,000 to 200,000, and more preferably 10,000 to 150,000. If the weight average molecular weight is less than 5,000, the film formability tends to decrease, and if it exceeds 200,000, the compatibility with other components tends to deteriorate.
- the content of the thermoplastic resin is preferably 15 to 70% by mass, and more preferably 20 to 60% by mass, based on the total amount of the adhesive, with respect to the total mass of the resin having the piperazine skeleton.
- the content of the thermoplastic resin is less than 15% by mass, the film formability tends to decrease, and when it is more than 70% by mass, it tends to be difficult to ensure sufficient fluidity.
- an adhesion aid such as a coupling agent represented by an alkoxysilane derivative or a silazane derivative, an adhesion improver, or a leveling agent may be appropriately added.
- a compound represented by the following general formula (23) is preferable as such an adhesion assistant.
- R 9 , R 10 and R 11 are each independently a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an alkoxycarbonyl group having 1 to 5 carbon atoms, Or an aryl group, and R 12 is a (meth) acryloyl group, a vinyl group, an isocyanate group, an imidazole group, a mercapto group, an amino group, a methylamino group, a dimethylamino group, a benzylamino group, a phenylamino group, a cyclohexylamino group.
- a group, a morpholino group, a piperazino group, a ureido group or a glycidyl group, and c represents an integer of 1 to 10.
- a rubber component may be added to the adhesive composition of the present embodiment for the purpose of stress relaxation and adhesive improvement.
- rubber components include polyisoprene, polybutadiene, carboxyl-terminated polybutadiene, hydroxyl-terminated polybutadiene, 1,2-polybutadiene, carboxyl-terminated 1,2-polybutadiene, hydroxyl-terminated 1,2-polybutadiene, acrylic rubber, styrene- Butadiene rubber, hydroxyl-terminated styrene-butadiene rubber, acrylonitrile-butadiene rubber, carboxyl group, hydroxyl group, (meth) acryloyl group or morpholine group-containing acrylonitrile-butadiene rubber, carboxylated nitrile rubber, hydroxyl-terminated poly (oxypropylene) ), Alkoxysilyl group-terminated poly (oxypropylene), poly (oxytetramethylene) glycol, polyolefin glycol,
- a rubber component containing a cyano group or a carboxyl group, which is a highly polar group, in the side chain or terminal is preferable from the viewpoint of improving adhesiveness.
- These compounds can be used individually by 1 type or in mixture of 2 or more types.
- the adhesive composition of the present embodiment includes a resin having a piperazine skeleton (for example, a resin having a piperazine skeleton represented by the general formula (1)), the first composition, the second composition, and a stabilizer. It can manufacture by mixing with the solvent which can melt
- the conductive particles may be added as appropriate during the dissolution / dispersion process.
- the adhesive composition of the present embodiment can be used in the form of a film.
- a solution prepared by adding a solvent or the like to the adhesive composition as necessary is applied onto a peelable substrate such as a fluororesin film, a polyethylene terephthalate film, or a release paper, or a substrate such as a nonwoven fabric is impregnated with the solution. It can be placed on a peelable substrate and used as a film after removing the solvent and the like.
- Use in the form of a film is more convenient from the viewpoint of handleability.
- FIG. 1 is a schematic cross-sectional view showing an embodiment of the film adhesive composition of the present invention.
- a film adhesive composition 1 shown in FIG. 1 is formed by forming the above-described adhesive composition into a film. According to this film-like adhesive composition, it is easy to handle, can be easily installed on the adherend, and can be easily connected.
- the film adhesive composition 1 may have a multilayer structure composed of two or more layers.
- the film adhesive composition 1 contains the said electroconductive particle, it can use suitably as an anisotropic conductive film.
- the adhesive composition and the film-like adhesive composition of the present embodiment can usually adhere adherends together using heating and pressurization.
- the heating temperature is preferably 100 to 250 ° C.
- the pressure is not particularly limited as long as it does not damage the adherend, but it is generally preferably 0.1 to 10 MPa. These heating and pressurization are preferably performed in the range of 0.5 to 120 seconds.
- the adherends are sufficiently bonded to each other even in a short period of heating and pressurization for 15 seconds under conditions of 150 to 200 ° C. and 3 MPa. It is possible to adhere.
- the adhesive composition and the film adhesive composition of the present embodiment can be used as adhesives for different types of adherends having different thermal expansion coefficients. Specifically, it is used as a semiconductor element adhesive material typified by anisotropic conductive adhesive, silver paste, silver film, etc., circuit connection material, CSP elastomer, CSP underfill material, LOC tape, etc. Can do.
- the adhesive composition of the present embodiment is used as an anisotropic conductive adhesive composition or an anisotropic conductive film, respectively, and circuit members having circuit electrodes formed on the main surface of the circuit board are connected to each other.
- An example of the case will be described. That is, an anisotropic conductive adhesive composition or an anisotropic conductive film is disposed between circuit electrodes facing each other on a circuit board, and heated and pressed to thereby connect the electrical connection between the facing circuit electrodes and the circuit board.
- the circuit members can be connected with each other.
- a substrate made of an inorganic substance such as a semiconductor, glass or ceramic, a board made of an organic substance such as polyimide or polycarbonate, a board formed by combining an inorganic substance such as glass / epoxy and an organic substance, or the like. can be used.
- the adhesive composition of this embodiment it is preferable to contain electroconductive particle in these.
- FIG. 2 is a schematic sectional view showing an embodiment of the circuit connection structure (circuit member connection structure) of the present invention.
- the circuit member connection structure of the present embodiment includes a first circuit member 20 and a second circuit member 30 that are opposed to each other.
- a circuit connection member 10 is provided between the circuit member 30 and the circuit member 30.
- the first circuit member 20 includes a circuit board (first circuit board) 21 and a circuit electrode (first circuit electrode) 22 formed on the main surface 21 a of the circuit board 21. Note that an insulating layer (not shown) may be formed on the main surface 21a of the circuit board 21 in some cases.
- the second circuit member 30 includes a circuit board (second circuit board) 31 and a circuit electrode (second circuit electrode) 32 formed on the main surface 31 a of the circuit board 31.
- an insulating layer (not shown) may be formed on the main surface 31a of the circuit board 31 according to circumstances.
- the first and second circuit members 20 and 30 are not particularly limited as long as electrodes that require electrical connection are formed. Specifically, glass or plastic substrates, printed wiring boards, ceramic wiring boards, flexible wiring boards, semiconductor silicon chips, etc., on which electrodes are formed of ITO, IZO, etc., used for liquid crystal displays, are mentioned. Used in combination as needed. As described above, in the present embodiment, materials such as printed wiring boards and polyimides, metals such as copper and aluminum, ITO (indium tin oxide), silicon nitride (SiN x ), silicon dioxide (SiO 2 ) are used. Circuit members having various surface states such as inorganic materials such as the above can be used.
- the circuit connection member 10 is made of a cured product of the adhesive composition of the present embodiment.
- the circuit connection member 10 contains an insulating material 11 and conductive particles 7.
- the conductive particles 7 are disposed not only between the circuit electrode 22 and the circuit electrode 32 facing each other but also between the main surfaces 21a and 31a.
- the circuit electrodes 22 and 32 are electrically connected via the conductive particles 7. That is, the conductive particles 7 are in direct contact with both the circuit electrodes 22 and 32.
- the conductive particles 7 are the conductive particles described above, and the insulating substance 11 is a cured product of each insulating component constituting the adhesive composition of the present embodiment.
- the circuit electrode 22 and the circuit electrode 32 facing each other are electrically connected via the conductive particles 7. For this reason, the connection resistance between the circuit electrodes 22 and 32 is sufficiently reduced. Therefore, the flow of current between the circuit electrodes 22 and 32 can be made smooth, and the functions of the circuit can be fully exhibited.
- the circuit connecting member 10 does not contain the conductive particles 7, the circuit electrode 22 and the circuit electrode 32 are in direct contact with each other to be electrically connected.
- the circuit connection member 10 is composed of the cured product of the adhesive composition of the present embodiment, the adhesion strength of the circuit connection member 10 to the circuit member 20 or 30 is sufficiently high, and a reliability test (high temperature high Stable performance (good adhesive strength and connection resistance) can be maintained even after the wet test).
- the first circuit member 20 described above and a film adhesive composition (film circuit connection material) 40 are prepared (see FIG. 3A).
- the film adhesive composition 40 is formed by forming an adhesive composition (circuit connection material) into a film shape, and contains the conductive particles 7 and the adhesive component 5. Even when the adhesive composition does not contain the conductive particles 7, the adhesive composition can be used for anisotropic conductive bonding as an insulating adhesive, and is sometimes called NCP (Non-Conductive Paste). . In addition, when the adhesive composition contains the conductive particles 7, the adhesive composition may be referred to as ACP (Anisotropic Conductive Paste).
- the thickness of the film adhesive composition 40 is preferably 10 to 50 ⁇ m. If the thickness of the film adhesive composition 40 is less than 10 ⁇ m, the adhesive composition tends to be insufficiently filled between the circuit electrodes 22 and 32. On the other hand, when it exceeds 50 ⁇ m, the adhesive composition between the circuit electrodes 22 and 32 cannot be sufficiently removed, and it is difficult to ensure conduction between the circuit electrodes 22 and 32.
- the film adhesive composition 40 is placed on the surface of the first circuit member 20 on which the circuit electrodes 22 are formed.
- the film adhesive composition 40 is attached on a support (not shown)
- the film adhesive composition 40 side is directed to the first circuit member 20, and the first Is mounted on the circuit member 20.
- the film adhesive composition 40 is in a film form and is easy to handle.
- the film-like adhesive composition 40 can be easily interposed between the first circuit member 20 and the second circuit member 30, and the first circuit member 20 and the second circuit member 30 Can be easily connected.
- the film adhesive composition 40 is pressurized to the arrow A and B direction of Fig.3 (a), and the film adhesive composition 40 is temporarily connected to the 1st circuit member 20 (FIG.3 (b)). reference). At this time, you may pressurize, heating. However, the heating temperature is lower than the temperature at which the adhesive composition in the film adhesive composition 40 is not cured.
- the second circuit member 30 is placed on the film adhesive composition 40 with the second circuit electrode facing the first circuit member 20.
- the 2nd circuit member 30 is put on the film adhesive composition 40. Put it on.
- the film-like adhesive composition 40 is pressurized through the first and second circuit members 20 and 30 in the directions of arrows A and B in FIG.
- the heating temperature at this time is set to a temperature at which the polymerization reaction can be started.
- the film-like adhesive composition 40 is cured to perform the main connection, and a circuit member connection structure as shown in FIG. 2 is obtained.
- connection conditions are preferably a heating temperature of 100 to 250 ° C., a pressure of 0.1 to 10 MPa, and a connection time of 0.5 seconds to 120 seconds. These conditions are appropriately selected depending on the application to be used, the adhesive composition, and the circuit member, and may be post-cured as necessary.
- the conductive particles 7 can be brought into contact with both of the circuit electrodes 22 and 32 facing each other. , 32 can be sufficiently reduced.
- the adhesive component 5 is cured by the heating of the film-like adhesive composition 40 in a state where the distance between the circuit electrode 22 and the circuit electrode 32 is sufficiently small, so that the insulating material 11 is obtained.
- the member 20 and the second circuit member 30 are firmly connected via the circuit connection member 10. That is, in the circuit member connection structure obtained, since the circuit connection member 10 is made of a cured product of the adhesive composition of the present embodiment, the adhesion strength of the circuit connection member 10 to the circuit member 20 or 30 is high. While being sufficiently high, the connection resistance between the electrically connected circuit electrodes can be sufficiently reduced. Moreover, even when it is left for a long time in a high temperature and high humidity environment, it is possible to sufficiently suppress a decrease in adhesive strength and an increase in connection resistance.
- FIG. 4 is a schematic cross-sectional view showing an embodiment of the semiconductor device of the present invention.
- the semiconductor device 2 includes a semiconductor element 50 and a substrate 60 that serves as a semiconductor support member, and a semiconductor that electrically connects between the semiconductor element 50 and the substrate 60.
- An element connection member 80 is provided.
- the semiconductor element connection member 80 is stacked on the main surface 60 a of the substrate 60, and the semiconductor element 50 is further stacked on the semiconductor element connection member 80.
- the substrate 60 includes a circuit pattern 61, and the circuit pattern 61 is electrically connected to the semiconductor element 50 via the semiconductor connection member 80 on the main surface 60 a of the substrate 60 or directly. And these are sealed with the sealing material 70, and the semiconductor device 2 is formed.
- Examples of the material of the semiconductor element 50 include silicon, germanium group 4 semiconductor elements, GaAs, InP, GaP, InGaAs, InGaAsP, AlGaAs, InAs, GaInP, AlInP, AlGaInP, GaNAs, GaNP, GaInNAs, GaInNP, GaSb, InSb, III-V compound semiconductor devices such as GaN, AlN, InGaN, InNAsP, II-VI compound semiconductor devices such as HgTe, HgCdTe, CdMnTe, CdS, CdSe, MgSe, MgS, ZnSe, ZeTe, and CuInSe (CIS) Various things, such as these, can be used.
- the semiconductor element connection member 80 contains the insulating substance 11 and the conductive particles 7.
- the conductive particles 7 are disposed not only between the semiconductor element 50 and the circuit pattern 61 but also between the semiconductor element 50 and the main surface 60a. In the semiconductor device 2, the semiconductor element 50 and the circuit pattern 61 are electrically connected via the conductive particles 7. For this reason, the connection resistance between the semiconductor element 50 and the circuit pattern 61 is sufficiently reduced. Therefore, the current flow between the semiconductor element 50 and the circuit pattern 61 can be made smooth, and the functions of the semiconductor can be fully exhibited.
- the semiconductor element connection member 80 does not contain the conductive particles 7, the semiconductor element 50 and the circuit pattern 61 are brought into direct contact with each other so that a desired amount of current flows or sufficiently close to the electric current. Connected.
- the semiconductor element connecting member 80 is constituted by a cured product of the adhesive composition of the present embodiment. From this, the adhesive strength of the semiconductor element connection member 80 to the semiconductor element 50 and the substrate 60 is sufficiently high, and the connection resistance between the semiconductor element 50 and the circuit pattern 61 is sufficiently small. Moreover, even when it is left for a long time in a high temperature and high humidity environment, it is possible to sufficiently suppress a decrease in adhesive strength and an increase in connection resistance. Further, the semiconductor element connection member 80 can be formed by a heat treatment at a low temperature for a short time. Therefore, the semiconductor device 2 can have higher reliability than before.
- the semiconductor device 2 uses the substrate 60 and the semiconductor element 50 for the first and second circuit members 20 and 30 in the method for manufacturing the circuit member connection structure described above, and the method for manufacturing the circuit member connection structure described above. It can be manufactured by the same method.
- the present invention provides an adhesion improver for glass comprising a resin having a piperazine skeleton.
- the adhesion improver for glass can be used by (1) a method of adding to a resin or the like used as an adhesive, (2) a method of adding to a resin constituting a base material to be bonded, or (3) It can also be used alone as a primer. Whichever method of use is employed, the adhesive strength to glass can be improved, and heat resistance can be imparted.
- the resin having a piperazine skeleton contained in the glass adhesion improver
- a resin similar to the “resin having a piperazine skeleton” contained in the above-described adhesive composition can be applied. That is, the meaning and preferred embodiment of the piperazine skeleton in the adhesion improver for glass and the significance and preferred embodiment of the resin having a piperazine skeleton are the same as those in the above-mentioned adhesive composition.
- the resin having a piperazine skeleton preferably has a 5% weight loss temperature of 150 ° C. or higher, and more preferably 200 ° C. or higher. When the 5% weight loss temperature is 150 ° C.
- the 5% weight reduction temperature of the resin having a piperazine skeleton is 150 ° C. or higher” means that a 5% weight reduction is observed when the resin is heated to 150 ° C. or higher.
- the NMP solution of the polyimide resin was put into methanol, and the precipitate was collected, then pulverized and dried to obtain polyimide resin 1.
- the resulting polyimide resin 1 had a weight average molecular weight of 112,000.
- the polyimide resin 1 was dissolved in MEK so as to be 40% by mass.
- the amount of fluorine (content of fluorine atoms) in the repeating unit of polyimide resin 1 was 13.7% by mass.
- the NMP solution of the polyimide resin was put into methanol, and the precipitate was collected, then pulverized and dried to obtain polyimide resin 2.
- the resulting polyimide resin 2 had a weight average molecular weight of 108,000.
- the polyimide resin 2 was dissolved in MEK so as to be 40% by mass.
- the NMP solution of the above polyamide resin was put into methanol, and the precipitate was collected, then pulverized and dried to obtain polyamide resin 1.
- the obtained polyamide resin 1 had a weight average molecular weight of 92,000.
- the said polyamide resin 1 was melt
- the NMP solution of the above polyamide resin was poured into water, and the precipitate was collected, then pulverized and dried to obtain a polyamide resin 2.
- the obtained polyamide resin 2 had a weight average molecular weight of 75,000.
- the polyamide resin 2 was dissolved in MEK so as to be 40% by mass.
- the above THF solution was put into methanol, and the precipitate was collected, then pulverized and dried to obtain polyurethane resin 1.
- the weight average molecular weight of the obtained polyurethane resin 1 was 94000 as a result of measurement by GPC.
- the above THF solution was put into methanol, and the precipitate was collected, then pulverized and dried to obtain polyurethane resin 2.
- the weight average molecular weight of the obtained polyurethane resin 2 was 11000 as a result of measurement by GPC.
- a layer made of nickel was provided on the surface of the polystyrene particles so as to have a thickness of 0.2 ⁇ m, and a layer made of gold was provided on the surface of the layer made of nickel so as to have a thickness of 0.04 ⁇ m. .
- conductive particles having an average particle diameter of 5 ⁇ m were produced.
- PET polyethylene terephthalate
- the tack force of the film-like adhesive compositions obtained in Examples 1 to 8 and Comparative Examples 1 to 4 was measured by a probe tack test method according to JIS Z 0237. Using a tacking tester TAC-II manufactured by RHESCA, measurement was performed at a stage temperature of 30 ° C., a probe temperature of 30 ° C., a load of 100 gf for 1 second, and a test speed of 600 mm / min.
- thermocompression bonding apparatus thermocompression bonding apparatus (heating method: constant heat type, manufactured by Toray Engineering Co., Ltd.), the film adhesive compositions obtained in Examples 1 to 8 and Comparative Examples 1 to 4 were transferred to a circuit member.
- the test was conducted under two heating and pressing conditions of 1 MPa at a temperature of 70 ° C. for 2 seconds and 1 MPa at a temperature of 80 ° C. for 5 seconds.
- glass thickness 1.1 mm, surface resistance 20 ⁇ / ⁇
- ITO indium oxide
- each film-like adhesive composition is covered with the same PET to which the connection material is applied as a cover PET film and stored for a long period (for 6 months at 10 ° C.), after which the connection material is applied to the PET film. The presence or absence of transcription was observed.
- the film-like adhesive compositions obtained in Examples 1 to 8 contain 70 ° C., 1 MPa, 2 s because the adhesive compositions contain a resin having a piperazine skeleton. Transfer to the circuit member is possible even under the heating and pressurizing conditions, and even when stored for a long time (6 months at 10 ° C.), the transfer of the adhesive composition to the PET film covering the surface is not seen It was. In particular, it was revealed that Examples 1 to 4 and 6 to 8 containing 10 parts by mass or more of the resin having a piperazine skeleton exhibited particularly good transferability.
- Comparative Examples 1 to 3 consisting only of a resin having no piperazine skeleton
- the film adhesive composition was transferred under the conditions of 80 ° C., 1 MPa, and 5 s, but was transferred under the conditions of 70 ° C., 1 MPa, and 2 s. I could not.
- the film-like adhesive composition of Comparative Example 4 in which the tackiness of the adhesive composition was increased was transferred to the circuit member even under the conditions of 70 ° C., 1 MPa, and 2 s, but stored at 10 ° C. for 6 months. Later, the adhesive composition was transferred to the cover PET film.
- thermocompression bonding apparatus heating method: Using a constant heat type (manufactured by Toray Engineering Co., Ltd.), heating and pressurization at 190 ° C. and 3 MPa for 15 seconds were performed.
- the connection body by which the FPC board and the ITO board
- connection resistance The resistance value (connection resistance) between the adjacent circuits of the obtained connection body after the initial connection and after the high temperature and high humidity test was measured with a multimeter.
- the high temperature and high humidity test was performed under conditions of a temperature of 85 ° C., a relative humidity of 85%, and a test time of 250 hours, and the resistance value was shown as an average of 37 resistances between adjacent circuits.
- the adhesive strength of this connection body was measured by a 90-degree peeling method according to JIS-Z0237 and evaluated.
- Tensilon UTM-4 peeleling speed 50 mm / min, 25 ° C. manufactured by Toyo Baldwin Co., Ltd. was used as an adhesive strength measuring apparatus.
- Table 3 shows the measurement results of connection resistance and adhesive force.
- connection resistance and adhesive strength of Examples 1 to 8 both showed good values.
- connection resistance is 3.0 ⁇ or less even after the high-temperature and high-humidity test
- the adhesive force is 8 N / cm or more at the initial stage of connection, and 6 N / cm or more even after the high-temperature and high-humidity test.
- the NMP solution of PI-1 was put into methanol and the precipitate was collected. This precipitate was pulverized and dried to obtain PI-1.
- the weight average molecular weight of the obtained PI-1 was 108000 as a result of measurement by GPC.
- the PI-1 was dissolved in MEK (methyl ethyl ketone) so as to be 40% by mass.
- PA-1 polyamide resin
- the NMP solution of PA-1 was poured into water and the precipitate was collected. This precipitate was dried to obtain PA-1.
- the weight average molecular weight of the obtained PA-1 was 92000 as a result of measurement by GPC.
- the PA-1 was dissolved in MEK (methyl ethyl ketone) so as to be 40% by mass.
- the NMP solution of PI-4 was put into methanol, and the precipitate was collected. This precipitate was pulverized and dried to obtain PI-4.
- the weight average molecular weight of the obtained PI-4 was 55000 as a result of measurement by GPC.
- the NMP solution of PI-5 was put into methanol, and the precipitate was collected. This precipitate was pulverized and dried to obtain PI-5.
- the weight average molecular weight of the obtained PI-5 was 66000 as a result of measurement by GPC.
- polyimide resin (PI-6) 15 mmol of polyoxypropylenediamine, 30 mmol of 2,2-bis (4- (4-aminophenoxy) phenyl) hexafluoropropane and 1,4-bisaminopropylpiperazine as diamine compounds Synthesis was performed in the same manner as (PI-4) except that 75 mmol and 313 g of N-methyl-2-pyrrolidone (NMP) were used as a solvent, and an NMP solution of polyimide resin (hereinafter referred to as “PI-6”) was obtained. Obtained.
- NMP N-methyl-2-pyrrolidone
- the NMP solution of PI-6 was put into methanol and the precipitate was collected. This precipitate was pulverized and dried to obtain PI-6.
- the weight average molecular weight of the obtained PI-6 was 67000 as a result of measurement by GPC.
- PI-2 polyimide resin
- the NMP solution of PI-2 was put into methanol, and the precipitate was collected, then pulverized and dried to obtain PI-2.
- the weight average molecular weight of the obtained PI-2 was 112000 as a result of measurement by GPC.
- the above PI-2 was dissolved in MEK so as to be 40% by mass.
- thermogravimetric change was measured using TG-DTA-4000 (manufactured by Mac Science). The measurement results are shown in FIG.
- the resin (PI-1) having a piperazine skeleton showed almost no weight loss even when the temperature exceeded 300 ° C.
- the resin composition (PI-3) in which a compound having a piperazine skeleton was added to a resin having no piperazine skeleton showed a decrease in weight due to volatilization of the compound having a piperazine skeleton from around 60 ° C.
- the piperazine skeleton is present as a constituent element of the polymer chain in order to exhibit the heat resistance of the adhesion improver for glass of the present invention.
- Table 5 shows the measurement results of the appearance of the SiNx laminates prepared using A-1 and A-4 to A-6, which were subjected to moisture absorption treatment for 40 hours under conditions of a temperature of 80 ° C. and a humidity of 95%. Show.
- “No change” means that there is no change in appearance, and the result shown as “peeling” means that partial peeling of the coated material from SiNx was observed.
- the amount of fluorine (mass%) was calculated by the formula: [number of fluorine atoms in repeating unit] ⁇ 19.0 ⁇ [molecular weight of repeating unit] ⁇ 100.
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Abstract
Description
(樹脂の合成)
(ピペラジン骨格を有するポリイミド樹脂1の合成)
ディーンスターク還流冷却器、温度計、撹拌器を備えた500mLのセパラブルフラスコにジアミン化合物としてポリオキシプロピレンジアミン(Mn=2000)15.0mmol及び1,4-ビスアミノプロピルピペラジン105.0mmol、溶媒としてN-メチル-2-ピロリドン(NMP)287gを加え、窒素気流下に室温で30分間撹拌した。次いで、テトラカルボン酸二無水物として4,4’-ヘキサフルオロプロピリデンビスフタル酸二無水物120.0mmolを加え、50℃まで昇温した。その温度で1時間攪拌した後、さらに180℃まで昇温し、ディーンスターク還流冷却器にて水とNMPの混合物を除去しながら3時間加熱し、ポリイミド樹脂のNMP溶液を得た。
ディーンスターク還流冷却器、温度計、撹拌器を備えた500mLのセパラブルフラスコにジアミン化合物としてポリオキシプロピレンジアミン15.0mmol及び2,2-ビス[4-(4-アミノフェノキシ)フェニル]プロパン105.0mmol、溶媒としてN-メチル-2-ピロリドン(NMP)287gを加え、窒素気流下に室温で30分間撹拌した。次いで、テトラカルボン酸二無水物として4,4’-ヘキサフルオロプロピリデンビスフタル酸二無水物114.0mmolを加え、50℃まで昇温して、その温度で1時間攪拌した後、さらに180℃まで昇温し、ディーンスターク還流冷却器に水とNMPの混合物を除去しながら3時間還流させ、ポリイミド樹脂のNMP溶液を得た。
冷却器、温度計及び撹拌器を備えた500mLのセパラブルフラスコに、ジアミン化合物としてポリオキシプロピレンジアミン15.0mmol及び1,4-ビスアミノプロピルピペラジン105.0mmol、溶媒としてN-メチル-2-ピロリドン(NMP)218g、並びに副生する塩酸のトラップ剤としてトリエチルアミン264mmolを加え、室温(25℃)で30分間撹拌した。次いで、ジカルボン酸として二塩化イソフタロイル120.0mmolを加え、氷水浴で冷却して、その温度で1時間攪拌した。その後、更に室温まで昇温し、1時間攪拌させ、ポリアミド樹脂のNMP溶液を得た。
冷却器、温度計及び撹拌器を備えた500mLのセパラブルフラスコに、ジアミン化合物としてポリオキシプロピレンジアミン15.0mmol及び2,2-ビス[4-(4-アミノフェノキシ)フェニル]プロパン105.0mmol、溶媒としてN-メチル-2-ピロリドン(NMP)218g、並びに副生する塩酸のトラップ剤としてトリエチルアミン264mmolを加え、室温(25℃)で30分間撹拌した。次いで、ジカルボン酸として二塩化イソフタロイル120.0mmolを加え、氷水浴で冷却して、その温度で1時間攪拌した。その後、更に室温まで昇温し、1時間攪拌させ、ポリアミド樹脂のNMP溶液を得た。
還流冷却器、温度計及び撹拌器を備えた500mLのセパラブルフラスコに、ジオール化合物としてポリ(ヘキサメチレンカーボネート)ジオール(Mn=2000)25.0mmol及び1-(2-ヒドロキシエチル)ピペラジン175.0mmol、並びに溶媒としてテトラヒドロフラン(THF)240gを加え、40℃で30分間撹拌した。70℃まで昇温した後、触媒としてジメチル錫ラウレート12.7mgを加え、次いでジイソシアネート化合物としてイソホロンジイソシネート200mmolを1時間かけて滴下した。その後、赤外分光光度計でNCOの吸収ピークが見られなくなるまでこの温度で攪拌を続け、ポリウレタン樹脂のTHF溶液を得た。
還流冷却器、温度計及び撹拌器を備えた500mLのセパラブルフラスコに、ジオール化合物としてポリ(ヘキサメチレンカーボネート)ジオール(Mn=2000)200.0mmol並びに溶媒としてテトラヒドロフラン(THF)240gを加え、40℃で30分間撹拌した。70℃まで昇温した後、触媒としてジメチル錫ラウレート12.7mgを加え、次いでジイソシアネート化合物としてイソホロンジイソシネート200mmolを1時間かけて滴下した。その後、赤外分光光度計でNCOの吸収ピークが見られなくなるまでこの温度で攪拌を続け、ポリウレタン樹脂のTHF溶液を得た。
還流冷却器、温度計及び撹拌器を備えた2000mLのセパラブルフラスコに、脱イオン水500g、ブチルアクリレート40g、エチルアクリレート30g、アクリロニトリル30g、グリシジルメタクリレート3gを加え窒素気流下、室温で1時間撹拌した。その後、過硫酸アンモニウム0.5gを溶解した脱イオン水5gを加え、70℃まで加熱しそのまま3時間撹拌し、さらに90℃まで加熱して3時間撹拌した。得られた固体を回収後水洗、乾燥させた後、このアクリルゴムを質量比でトルエン/酢酸エチル=50/50の混合溶剤に溶解して、固形分15質量%の溶液とした。次にここで合成したアクリルゴムの15質量%溶液90.7gを撹拌器を備えた300mLのセパラブルフラスコに加え、1,4-ビス(3-アミノプロピル)ピペラジン(和光純薬工業株式会社製)0.29gを加え、室温にて3時間攪拌することで目的とするピペラジン骨格を有するアクリルゴム1を得た。得られたアクリルゴム1の重量平均分子量は、GPCによる測定の結果、800000であった。
還流冷却器、温度計及び撹拌器を備えた2000mLのセパラブルフラスコに、脱イオン水500g、ブチルアクリレート40g、エチルアクリレート30g、アクリロニトリル30g、グリシジルメタクリレート3gを加え窒素気流下、室温で1時間撹拌した。その後、過硫酸アンモニウム0.5gを溶解した脱イオン水5gを加え、70℃まで加熱しそのまま3時間撹拌し、さらに90℃まで加熱して3時間撹拌した。得られた固体を回収後水洗、乾燥させることでピペラジン骨格を有しないアクリルゴム2を得た。また、このアクリルゴム2を質量比でトルエン/酢酸エチル=50/50の混合溶剤に溶解することで、固形分15質量%のアクリルゴム2の溶液とした。得られたアクリルゴム2の重量平均分子量は、GPCによる測定の結果、800000であった。
ポリスチレン粒子の表面上に、厚さ0.2μmになるようにニッケルからなる層を設け、更にこのニッケルからなる層の表面上に、厚さ0.04μmになるように金からなる層を設けた。こうして平均粒径5μmの導電性粒子を作製した。
また、マイクロカプセル型潜在性硬化剤(マイクロカプセル化されたアミン系硬化剤)と、ビスフェノールF型エポキシ樹脂と、ナフタレン型エポキシ樹脂とを、質量比34:49:17で含有する液状の硬化剤含有エポキシ樹脂(エポキシ当量:202)を用意した。
ビスフェノールA型エポキシ樹脂と、分子内にフルオレン環構造を有するフェノール化合物(4,4’-(9-フルオレニリデン)-ジフェニール)とからフェノキシ樹脂を合成し、この樹脂を質量比でトルエン/酢酸エチル=50/50の混合溶剤に溶解して、固形分40質量%の溶液とした。
平均重量平均分子量800のポリカプロラクトンジオール400部と、2-ヒドロキシプロピルアクリレート131部、触媒としてジブチル錫ジラウレート0.5部、重合禁止剤としてハイドロキノンモノメチルエーテル1.0部を攪拌しながら50℃に加熱して混合した。次いで、イソホロンジイソシアネート222部を滴下し更に攪拌しながら80℃に昇温してウレタン化反応を行った。イソシアネート基の反応率が99%以上になったことを確認後、反応温度を下げて重量平均分子量8500のウレタンアクリレートを得た。
上記材料を固形分質量で、ポリイミド樹脂1/アクリルゴム2/硬化剤含有エポキシ樹脂=20g/30g/50gの割合で配合し、接着剤組成物含有液を作製した。この接着剤組成物含有液に対して導電性粒子を3体積%分散させた。そして、この接着剤組成物含有液を、両面を表面処理(離型処理)した厚み50μmのポリエチレンテレフタレート(PET)フィルムの、表面処理量の少ない面に塗工装置を用いて塗布し、70℃3分の熱風乾燥により、PETフィルム上に厚み16μmのフィルム状接着剤組成物(実施例1)を得た。
上記材料を固形分質量で、ポリイミド樹脂1/フェノキシ樹脂/アクリルゴム2/硬化剤含有エポキシ樹脂=10g/20g/20g/50gの割合で配合し、接着剤組成物含有液を作成した。そのほかは実施例1と同様にしてフィルム状接着剤組成物(実施例2)を得た。
上記材料を固形分質量で、ポリイミド樹脂1/ウレタンアクリレート/リン酸エステル型アクリレート/t-ヘキシルパーオキシ2-エチルヘキサノネート(日油株式会社製、商品名パーキュアHO)=50g/50g/3g/5gの割合で配合し、接着剤組成物含有液を作製した。そのほかは実施例1と同様にしてフィルム状接着剤組成物(実施例3)を得た。
上記材料を固形分質量で、ポリイミド樹脂1/フェノキシ樹脂/ウレタンアクリレート/リン酸エステル型アクリレート/t-ヘキシルパーオキシ2-エチルヘキサノネート=35g/20g/45g/3g/5gの割合で配合し、接着剤組成物含有液を作成した。そのほかは実施例1と同様にしてフィルム状接着剤組成物(実施例4)を得た。
上記材料を固形分質量で、ポリイミド樹脂1/フェノキシ樹脂/アクリルゴム2/硬化剤含有エポキシ樹脂=0.5g/29.5g/20g/50gの割合で配合し、接着剤組成物含有液を作成した。そのほかは実施例1と同様にしてフィルム状接着剤組成物(実施例5)を得た。
上記材料を固形分質量で、ポリアミド樹脂1/フェノキシ樹脂/アクリルゴム2/硬化剤含有エポキシ樹脂=10g/20g/20g/50gの割合で配合し、接着剤組成物含有液を作成した。そのほかは実施例1と同様にしてフィルム状接着剤組成物(実施例6)を得た。
上記材料を固形分質量で、ポリウレタン樹脂1/フェノキシ樹脂/アクリルゴム2/硬化剤含有エポキシ樹脂=10g/20g/20g/50gの割合で配合し、接着剤組成物含有液を作成した。そのほかは実施例1と同様にしてフィルム状接着剤組成物(実施例7)を得た。
上記材料を固形分質量で、フェノキシ樹脂/アクリルゴム1/硬化剤含有エポキシ樹脂=20g/30g/50gの割合で配合し、接着剤組成物含有液を作成した。そのほかは実施例1と同様にしてフィルム状接着剤組成物(実施例8)を得た。
上記材料を固形分質量で、ポリイミド樹脂2/アクリルゴム2/硬化剤含有エポキシ樹脂=30g/20g/50gの割合で配合し、接着剤組成物含有液を作成した。そのほかは実施例1と同様にしてフィルム状接着剤組成物(比較例1)を得た。
上記材料を固形分質量で、ポリウレタン樹脂2/フェノキシ樹脂/アクリルゴム2/硬化剤含有エポキシ樹脂=10g/20g/20g/50gの割合で配合し、接着剤組成物含有液を作成した。そのほかは実施例1と同様にしてフィルム状接着剤組成物(比較例2)を得た。
上記材料を固形分質量で、フェノキシ樹脂/アクリルゴム2/硬化剤含有エポキシ樹脂=20g/30g/50gの割合で配合し、接着剤組成物含有液を作成した。そのほかは実施例1と同様にしてフィルム状接着剤組成物(比較例3)を得た。
上記材料を固形分質量で、フェノキシ樹脂/ウレタンアクリレート/リン酸エステル型アクリレート/t-ヘキシルパーオキシ2-エチルヘキサノネート=15g/85g/3g/5gの割合で配合し、接着剤組成物含有液を作製した。そのほかは実施例1と同様にしてフィルム状接着剤組成物(比較例4)を得た。
JIS Z 0237に準じてプローブタック試験法によって実施例1~8、比較例1~4で得られたフィルム状接着剤組成物のタック力を測定した。RHESCA社製タッキング試験機TAC-IIを用い、ステージ温度30℃、プローブ温度30℃、荷重100gfで1秒、試験速度600mm/minで測定した。
実施例1~8及び比較例1~4で得られたフィルム状接着剤組成物の、回路部材への転写性を、熱圧着装置(加熱方式:コンスタントヒート型、東レエンジニアリング株式会社製)を用いて、70℃の温度にて1MPaで2秒間及び80℃の温度にて1MPaで5秒間の、2つの加熱加圧条件で調べた。なお、該回路部材として厚さ0.2μmの酸化インジウム(ITO)の薄層を形成したガラス(厚さ1.1mm、表面抵抗20Ω/□)を用いた。
さらに各フィルム状接着剤組成物を、カバーPETフィルムとして該接続材料を塗布したものと同じPETで覆い、長期(10℃にて6ヶ月間)保管した後で、PETフィルムへの該接続材料の転写の有無を観察した。
得られた接続体の隣接回路間の、接続初期及び高温高湿試験後の抵抗値(接続抵抗)を、マルチメータで測定した。なお、高温高湿試験は温度85℃、相対湿度85%、試験時間250時間の条件とし、抵抗値は隣接回路間の抵抗37点の平均で示した。次にこの接続体の接着強度をJIS-Z0237に準じて90度剥離法で測定し、評価した。ここで、接着強度の測定装置は東洋ボールドウィン株式会社製テンシロンUTM-4(剥離速度50mm/min、25℃)を使用した。接続抵抗及び接着力の測定結果を表3に示す。
<樹脂の合成>
1.ピペラジン骨格を有する樹脂の合成例
(1)ポリイミド樹脂(PI-1)の調製
ディーンスターク還流冷却器、温度計及び撹拌器を備えた500mLのセパラブルフラスコに、ジアミン化合物としてポリオキシプロピレンジアミン15.0mmol及び1,4-ビスアミノプロピルピペラジン105.0mmol、並びに溶媒としてN-メチル-2-ピロリドン(NMP)287gを加え、室温(25℃)で30分間撹拌した。次いで、テトラカルボン酸二無水物として4,4’-ヘキサフルオロプロピリデンビスフタル酸二無水物120.0mmolを加え、50℃まで昇温して、その温度で1時間攪拌した。その後、更に180℃まで昇温し、ディーンスターク還流冷却器により水とNMPの混合物を除去しながら3時間還流させ、ポリイミド樹脂(以下「PI-1」と呼ぶ。)のNMP溶液を得た。
PI-1のMEK溶液(Nv27.3%)8.8g、重量平均分子量800のポリカプロラクトンジオールのMEK溶液(Nv50%)9.6g、2-ヒドロキシプロピルアクリレート4.8g、硬化剤として2,5-ジメチル-2,5-ジ(2-エチルヘキサノイルペルオキシ)ヘキサンのMEK溶液(Nv50%)0.192g、及び希釈剤としてMEK3.9gを混合して、上記PI-1を含むアクリル硬化系の樹脂組成物のMEK溶液(以下「A-1」と呼ぶ。)を得た。
冷却器、温度計及び撹拌器を備えた500mLのセパラブルフラスコに、ジアミン化合物としてポリオキシプロピレンジアミン15.0mmol及び1,4-ビスアミノプロピルピペラジン105.0mmol、溶媒としてN-メチル-2-ピロリドン(NMP)218g、並びに副生する塩酸のトラップ剤としてトリエチルアミン264mmolを加え、室温(25℃)で30分間撹拌した。次いで、ジカルボン酸として二塩化イソフタロイル120.0mmolを加え、氷水浴で冷却して、その温度で1時間攪拌した。その後、更に室温まで昇温し、1時間攪拌させ、ポリアミド樹脂(以下「PA-1」と呼ぶ。)のNMP溶液を得た。
ディーンスターク還流冷却器、温度計及び撹拌器を備えた500mLのセパラブルフラスコに、ジアミン化合物としてポリオキシプロピレンジアミン2.88mmol、2,2-ビス(4-(4-アミノフェノキシ)フェニル)ヘキサフルオロプロパン58.56mmol及び1,4-ビスアミノプロピルピペラジン58.56mmol、並びに溶媒としてN-メチル-2-ピロリドン(NMP)278gを加え、室温(25℃)で30分間撹拌した。次いで、テトラカルボン酸二無水物として4,4’-ヘキサフルオロプロピリデンビスフタル酸二無水物120.0mmolを加え、50℃まで昇温して、その温度で1時間攪拌した。その後、更に180℃まで昇温し、ディーンスターク還流冷却器により水とNMPの混合物を除去しながら1時間還流させ、ポリイミド樹脂(以下「PI-4」と
呼ぶ。)のNMP溶液を得た。
ジアミン化合物としてポリオキシプロピレンジアミン15mmol、2,2-ビス(4-(4-アミノフェノキシ)フェニル)ヘキサフルオロプロパン52.5mmol及び1,4-ビスアミノプロピルピペラジン52.5mmol、並びに溶媒としてN-メチル-2-ピロリドン(NMP)334gを用いた以外は(PI-4)と同様に合成を行い、ポリイミド樹脂(以下「PI-5」と呼ぶ。)のNMP溶液を得た。
ジアミン化合物としてポリオキシプロピレンジアミン15mmol、2,2-ビス(4-(4-アミノフェノキシ)フェニル)ヘキサフルオロプロパン30mmol及び1,4-ビスアミノプロピルピペラジン75mmol、並びに溶媒としてN-メチル-2-ピロリドン(NMP)313gを用いた以外は(PI-4)と同様に合成を行い、ポリイミド樹脂(以下「PI-6」と呼ぶ。)のNMP溶液を得た。
PI-4、PI-5及びPI-6をそれぞれ2.4g、重量平均分子量800のポリカプロラクトンジオールのMEK溶液(Nv50%)9.6g、2-ヒドロキシプロピルアクリレート4.8g、硬化剤として2,5-ジメチル-2,5-ジ(2-エチルヘキサノイルペルオキシ)ヘキサンのMEK溶液(Nv50%)0.192g、及び希釈剤としてMEK10.3gを混合して、上記PI-4、PI-5又はPI-6を含むアクリル硬化系の樹脂組成物のMEK溶液(以下「A-4」、「A-5」及び「A-6」と呼ぶ。)をそれぞれ得た。
(1)ポリイミド樹脂(PI-2)の調製
ディーンスターク還流冷却器、温度計及び撹拌器を備えた500mLのセパラブルフラスコに、ジアミン化合物としてポリオキシプロピレンジアミン15.0mmol及び2、2-ビス[4-(4-アミノフェノキシ)フェニル]プロパン105.0mmol、並びに溶媒としてN-メチル-2-ピロリドン(NMP)287gを加え、窒素気流下に室温(25℃)で30分間撹拌した。次いで、テトラカルボン酸二無水物として4、4’-ヘキサフルオロプロピリデンビスフタル酸二無水物120.0mmolを加え、50℃まで昇温して、その温度で1時間攪拌した。その後、更に180℃まで昇温し、ディーンスターク還流冷却器により水とNMPの混合物を除去しながら3時間還流させ、ポリイミド樹脂(以下「PI-2」と呼ぶ。)のNMP溶液を得た。
重量平均分子量800のポリカプロラクトンジオールのMEK溶液(Nv50%)9.6g、2-ヒドロキシプロピルアクリレート4.8g、硬化剤として2,5-ジメチル-2,5-ジ(2-エチルヘキサノイルペルオキシ)ヘキサンのMEK溶液(Nv50%)0.192g、及び希釈剤としてMEK3.9gを混合してアクリル硬化系の樹脂組成物のMEK溶液(以下「A-2」と呼ぶ。)を得た。
(1)ポリイミド系の樹脂組成物(PI-3)の調製
7.67gの上記PI-2、と、2.33gの1,4-ビスアミノプロピルピペラジンを混合して、上記PI-2とピペラジン骨格を有する化合物とを含むポリイミド系の樹脂組成物(以下「PI-3」と呼ぶ。)を得た。
調製したPI-1、PI-2のMEK溶液、アクリル硬化系の樹脂組成物のMEK溶液(A-1、A-2)、及びPA-1のMEK溶液をそれぞれバーコーターによって、各種の被着体(ソーダ石灰ガラス、SiNx、シリコンウェハ)上に厚さ15μmとなるように均一に塗布し、150℃で30分乾燥して塗布物から接着層を形成することにより、被着体上に接着層が形成された構造を有する実施例9~13、比較例5~7及び参考例1~4の積層体を作製した。塗布物と被着体との組み合わせを表4に示す。
各積層体について、被着体から接着層を剥離するのに必要な力(剥離力)をJIS-Z0237に準じて90°剥離法(剥離速度50mm/min、25℃)で測定した。測定装置にはテンシロンUTM-4(東洋ボールドウィン社製)を使用した。測定結果を表4に示す。なお、表4中「引き剥がせない」と示した結果は、接着力が強すぎて、使用した測定装置では塗布物を被着体から引き剥がすことができなかったことを意味する。
PI-1、PI-2及びPI-3について、熱重量変化をTG-DTA-4000(マックサイエンス社製)を用いて測定した。測定結果を図5に示した。ピペラジン骨格を有する樹脂(PI-1)は、300℃を超えてもほとんど重量減少が起こらなかった。これに対し、ピペラジン骨格を有しない樹脂にピペラジン骨格を有する化合物を添加した樹脂組成物(PI-3)は、60℃付近からピペラジン骨格を有する化合物の揮発により重量減少を示した。これにより、ピペラジン骨格は、高分子鎖の構成要素として存在することが、本発明のガラス用接着向上剤の耐熱性の発揮に必要であることが確認された。
A-1、及びA-4~A-6を用いて作成したSiNx積層体について、温度80℃、湿度95%の条件下で40時間吸湿処理を行い、外観を観察した測定結果を表5に示す。なお、表5中「変化なし」は外観上の変化がないこと、「剥がれ」と示した結果はSiNxからの塗布物の部分的な剥がれが観察されたことを意味する。なお、表5中、フッ素量(質量%)は、[繰返し単位中のフッ素原子の数]×19.0÷[繰返し単位の分子量]×100の計算式により算出した。
Claims (12)
- ピペラジン骨格を有する樹脂を含有する接着剤組成物。
- 前記ピペラジン骨格は、置換又は未置換のビスオルガノピペラジン骨格である、請求項1に記載の接着剤組成物。
- 前記ピペラジン骨格は、置換又は未置換のビスアルキルピペラジン骨格である、請求項1又は2に記載の接着剤組成物。
- 前記式(1)中、前記R3は、炭素数が1~10である1価の有機基、ヒドロキシ基、カルボキシ基又はスルホ基を示す、請求項4に記載の接着剤組成物。
- 前記ピペラジン骨格を有する樹脂は、
ピペラジン骨格を有する繰返し単位から構成されるポリイミド又はその前駆体であり、
前記繰返し単位は、7.5質量%以上のフッ素原子を含有する繰返し単位である、請求項1~5のいずれか一項に記載の接着剤組成物。 - 導電性粒子をさらに含有する、請求項1~6のいずれか一項に記載の接着剤組成物。
- フィルム状である請求項1~7のいずれか一項に記載の接着剤組成物。
- 対向配置された一対の回路部材と、前記一対の回路部材の間に設けられ、前記一対の回路部材が有する回路電極同士が電気的に接続されるように回路部材同士を接着する接続部材と、を備え、前記接続部材が、請求項1~8のいずれか一項に記載の接着剤組成物の硬化物からなるものである、回路接続構造体。
- 半導体素子と、前記半導体素子を搭載する基板と、前記半導体素子及び前記基板間に設けられ、前記半導体素子及び前記基板を電気的に接続させるとともに接着する接続部材と、を備え、前記接続部材が、請求項1~8のいずれか一項に記載の接着剤組成物の硬化物からなるものである、半導体装置。
- ピペラジン骨格を有する樹脂を含有してなるガラス用接着向上剤。
- 前記ピペラジン骨格を有する樹脂の5%重量減少温度が150℃以上である、請求項11に記載のガラス用接着向上剤。
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KR1020127013536A KR101388851B1 (ko) | 2009-11-04 | 2010-08-10 | 접착제, 회로 접속 구조체 및 반도체 장치 |
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JP2017145382A (ja) * | 2016-02-15 | 2017-08-24 | 太陽インキ製造株式会社 | 導電性接着剤とその製造方法、硬化物および電子部品 |
CN112266478A (zh) * | 2020-10-30 | 2021-01-26 | 深圳市道尔顿电子材料有限公司 | 低体阻聚酰亚胺及其制备方法和应用、聚酰亚胺薄膜及其制备方法 |
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KR101721732B1 (ko) * | 2014-07-25 | 2017-04-10 | 삼성에스디아이 주식회사 | 접착 조성물, 이방 도전성 필름 및 이를 이용한 반도체 장치 |
JP6561912B2 (ja) * | 2016-05-16 | 2019-08-21 | 東亞合成株式会社 | プラスチック製フィルム又はシート用活性エネルギー線硬化型接着剤組成物 |
JP6969165B2 (ja) * | 2017-06-02 | 2021-11-24 | 昭和電工マテリアルズ株式会社 | 異方導電性接着剤組成物、異方導電性フィルム、及び接続構造体 |
JP7056015B2 (ja) * | 2017-06-02 | 2022-04-19 | 昭和電工マテリアルズ株式会社 | ポリアミド |
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