WO2018203500A1 - 樹脂粒子、接続材料及び接続構造体 - Google Patents
樹脂粒子、接続材料及び接続構造体 Download PDFInfo
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- WO2018203500A1 WO2018203500A1 PCT/JP2018/016745 JP2018016745W WO2018203500A1 WO 2018203500 A1 WO2018203500 A1 WO 2018203500A1 JP 2018016745 W JP2018016745 W JP 2018016745W WO 2018203500 A1 WO2018203500 A1 WO 2018203500A1
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Images
Classifications
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- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
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- C08F299/02—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from unsaturated polycondensates
- C08F299/08—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from unsaturated polycondensates from polysiloxanes
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- C08G77/20—Polysiloxanes containing silicon bound to unsaturated aliphatic groups
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
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- C08G77/42—Block-or graft-polymers containing polysiloxane sequences
- C08G77/442—Block-or graft-polymers containing polysiloxane sequences containing vinyl polymer sequences
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/10—Block- or graft-copolymers containing polysiloxane sequences
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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
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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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
- C09J153/00—Adhesives based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2353/00—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2383/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2383/10—Block- or graft-copolymers containing polysiloxane sequences
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0806—Silver
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Definitions
- the present invention relates to a resin particle containing a silicone resin.
- the present invention also relates to a connection material and a connection structure using the resin particles.
- Patent Document 1 discloses spherical silicone elastomer particles.
- the main component of the spherical silicone elastomer particles is a silicone elastomer.
- the spherical silicone elastomer particles have an average particle size of 0.1 to 500 ⁇ m.
- the spherical silicone elastomer particles are substantially free of metal elements derived from the curing catalyst.
- Patent Document 2 discloses silicone particles having 100 parts by mass of silicone elastomer spherical particles and 0.5 to 25 parts by mass of polyorganosilsesquioxane for coating the surface thereof.
- the silicone elastomer spherical particles have a volume average particle size of 0.1 to 100 ⁇ m.
- the polyorganosilsesquioxane is granular.
- the size of the polyorganosilsesquioxane is 60 nm or less.
- Patent Document 3 is obtained by copolymerizing a silane compound having three functional groups represented by formula (1) and a silane compound having two functional groups represented by formula (2).
- Sponge-like silicone particles are disclosed.
- the sponge-like silicone particles are formed by connecting spherical silicone particles having an average primary particle diameter of 0.1 to 50 ⁇ m in a tuft shape.
- the average particle diameter of the sponge-like silicone particles is 1 to 100 ⁇ m.
- the sponge-like silicone particles can discharge 70% or more of the oil once absorbed.
- JP 2006-104456 A JP 2013-40241 A Japanese Unexamined Patent Publication No. 2015-140356
- connection part or an adhesive layer may be heated in order to harden binders, such as resin. is there.
- binders such as resin.
- internal stress may be generated due to curing shrinkage of a binder such as a resin. Since the generated internal stress causes a crack or the like in the connection portion or the adhesive layer, it is necessary to relax the internal stress.
- a binder such as a resin. Since the generated internal stress causes a crack or the like in the connection portion or the adhesive layer, it is necessary to relax the internal stress.
- An object of the present invention is to provide resin particles that can effectively relieve internal stress and can effectively suppress the occurrence of springback. Another object of the present invention is to provide a connection material and a connection structure using the resin particles.
- the Q units represented by the general formula: [SiO 4/2 ] 100% of the total number of the T units and the Q units Resin particles having a total number of 4% or less are provided.
- the compression recovery rate after 40% compression deformation is 10% or less.
- the 10% K value is 500 N / mm 2 or less.
- the particle diameter is 0.5 ⁇ m or more and 500 ⁇ m or less.
- the resin particle is a particle containing a silicone resin.
- the resin particle is used as a spacer.
- connection material including the above-described resin particles and binder or metal atom-containing particles.
- connection material includes a binder.
- connection material includes metal atom-containing particles.
- the thermal decomposition temperature of the resin particles is higher than the melting point of the metal atom-containing particles.
- connection material is used in order to form the connection part which connects two connection object members, and the said connection material is a sintered compact of the said metal atom containing particle
- connection target member the second connection target member, the connection portion connecting the first connection target member, and the second connection target member;
- connection portion connecting the first connection target member, and the second connection target member;
- the resin particles according to the present invention have a general formula: M unit represented by [(R) 3 SiO 1/2 ], a general formula: D unit represented by [(R) 2 SiO 2/2 ], and a general formula. : T unit represented by [(R) SiO 3/2 ] and general formula: Total of 100 units of the total number of Q units represented by [SiO 4/2 ], and the total of T unit and Q unit Is 4% or less. Since the resin particles according to the present invention have the above-described configuration, the internal stress can be effectively relieved and the occurrence of springback can be effectively suppressed.
- FIG. 1 is a cross-sectional view showing an example of a connection structure using resin particles according to the present invention.
- FIG. 2 is a cross-sectional view showing an example of a liquid crystal display element using the resin particles according to the present invention as a spacer for a liquid crystal display element.
- the resin particles according to the present invention have a general formula: M unit represented by [(R) 3 SiO 1/2 ], a general formula: D unit represented by [(R) 2 SiO 2/2 ], and a general formula. : T unit represented by [(R) SiO 3/2 ] and general formula: Total of 100 units of the total number of Q units represented by [SiO 4/2 ], and the total of T unit and Q unit Is 4% or less.
- M unit, D unit, T unit, and Q unit are represented by said general formula.
- R in the above general formula represents an arbitrary group. As an arbitrary group of R, an O 1/2 group bonded to Si outside the unit of the above general formula is excluded.
- the resin particles according to the present invention have the above-described configuration, the internal stress can be effectively relieved and the occurrence of springback can be effectively suppressed.
- the compression recovery rate is relatively low, the action of the compressed resin particles trying to return to the original shape is relatively difficult, and a springback occurs. It is hard to do.
- the spacer can be sufficiently brought into contact with a liquid crystal display element member and the like, and the gap can be controlled with higher accuracy.
- connection part or an adhesive layer may be heated in order to harden binders, such as resin. is there.
- binders such as resin.
- the connecting portion or the adhesive layer is heated, internal stress may be generated due to curing shrinkage of a binder such as a resin. Since the generated internal stress causes cracks and the like, the internal stress is preferably removed. Examples of the method for removing the internal stress include a heat treatment method. However, if a resin or the like is used for the connection portion or the adhesive layer, it is difficult to sufficiently remove internal stress even by heat treatment.
- the compression recovery rate is relatively low, and the action of returning the compressed resin particles to the original shape is relatively difficult to work.
- the resin particles according to the present invention for the connection portion or the adhesive layer, even if internal stress occurs in the connection portion or the adhesive layer due to heating or the like, the internal stress of the connection portion or the adhesive layer is reduced by the deformation of the resin particles. Can be effectively mitigated. As a result, the occurrence of cracks or the like in the connection portion or the adhesive layer can be effectively suppressed.
- the resin particles are preferably particles containing a silicone resin.
- the silicone resin preferably contains a specific organosiloxy unit (silicon-containing bond unit).
- the organosiloxy unit includes a monofunctional organosiloxy unit called M unit, a bifunctional organosiloxy unit called D unit, a trifunctional organosiloxy unit called T unit, and a tetrafunctional organosiloxy unit called Q unit.
- the Q unit is a unit that does not have an organic group having a carbon atom directly bonded to a silicon atom, but is regarded as an organosiloxy unit in the present invention.
- the siloxane bond is a bond in which two silicon atoms are bonded through one oxygen atom
- the number of oxygen atoms per silicon atom in the siloxane bond is considered to be 1/2. In the formula, it is expressed as O1 / 2 .
- one silicon atom contained in the D unit is bonded to two oxygen atoms, and each oxygen atom is bonded to a silicon atom of another unit. Yes. That is, the structure of the D unit is [—O 1/ 2- (R) 2 Si—O 1/2 —], and there are two O 1/2 s. Therefore, the D unit has the general formula: [( R) 2 SiO 2/2 ].
- the M unit is an organosiloxy unit represented by the general formula: [(R) 3 SiO 1/2 ]. Specifically, the M unit has a structure represented by the following formula (1).
- R1, R2 and R3 each represent an arbitrary group.
- R1, R2 and R3 each preferably represents an alkyl group, an aryl group, an allyl group, a hydrogen atom, or a divalent organic group having 1 to 5 carbon atoms.
- the organic group may contain a carbon atom, a hydrogen atom, and an oxygen atom.
- the organic group may be a divalent hydrocarbon group having 1 to 5 carbon atoms.
- the main chain of the organic group is preferably a divalent hydrocarbon group.
- a carboxyl group, a hydroxyl group, or the like may be bonded to a divalent hydrocarbon group.
- the structure represented by the above formula (1) may be bonded to another structure via R1, R2 or R3.
- the oxygen atom in the above formula (1) may form a siloxane bond with a silicon atom of another structure, or may form a bond with an atom other than the silicon atom of another structure.
- the structure represented by the above formula (1) is formed via a divalent hydrocarbon group. It is preferable to combine with other structures.
- the oxygen atom in the above formula (1) forms a siloxane bond with a silicon atom of another structure. And is preferably bonded to a divalent hydrocarbon group having another structure.
- the D unit is an organosiloxy unit represented by the general formula: [(R) 2 SiO 2/2 ]. Specifically, the D unit has a structure represented by the following formula (2).
- R4 and R5 each represents an arbitrary group.
- R4 and R5 each preferably represents an alkyl group, an aryl group, an allyl group, a hydrogen atom, or a divalent organic group having 1 to 5 carbon atoms.
- the organic group may contain a carbon atom, a hydrogen atom, and an oxygen atom.
- the organic group may be a divalent hydrocarbon group having 1 to 5 carbon atoms.
- the main chain of the organic group is preferably a divalent hydrocarbon group.
- a carboxyl group, a hydroxyl group, or the like may be bonded to a divalent hydrocarbon group.
- the structure represented by the above formula (2) may be bonded to another structure via R4 or R5.
- the oxygen atom in the above formula (2) may form a siloxane bond with a silicon atom of another structure, or may form a bond with an atom other than the silicon atom of another structure.
- the structure represented by the above formula (2) is formed via a divalent hydrocarbon group. It is preferable to combine with other structures.
- the oxygen atom in the above formula (2) forms a siloxane bond with a silicon atom of another structure. And is preferably bonded to a divalent hydrocarbon group having another structure.
- the T unit is an organosiloxy unit represented by the general formula: [(R) SiO 3/2 ]. Specifically, the T unit has a structure represented by the following formula (3).
- R6 represents an arbitrary group.
- R6 preferably represents an alkyl group, an aryl group, an allyl group, a hydrogen atom, or a divalent organic group having 1 to 5 carbon atoms.
- the organic group may contain a carbon atom, a hydrogen atom, and an oxygen atom.
- the organic group may be a divalent hydrocarbon group having 1 to 5 carbon atoms.
- the main chain of the organic group is preferably a divalent hydrocarbon group.
- a carboxyl group, a hydroxyl group, or the like may be bonded to a divalent hydrocarbon group.
- the structure represented by the above formula (3) may be bonded to another structure via R6.
- the oxygen atom in the above formula (3) may form a siloxane bond with a silicon atom of another structure, or may form a bond with an atom other than the silicon atom of another structure.
- the structure represented by the above formula (3) is formed via a divalent hydrocarbon group. It is preferable to combine with other structures.
- the oxygen atom in the above formula (3) forms a siloxane bond with a silicon atom of another structure. And is preferably bonded to a divalent hydrocarbon group having another structure.
- the Q unit is an organosiloxy unit (siloxy unit) represented by the general formula: [SiO 4/2 ]. Specifically, the Q unit has a structure represented by the following formula (4).
- the oxygen atom in the above formula (4) may form a siloxane bond with a silicon atom of another structure, or may form a bond with an atom other than the silicon atom of another structure. From the viewpoint of more effectively mitigating the internal stress and more effectively suppressing the occurrence of springback, the oxygen atom in the above formula (4) forms a siloxane bond with a silicon atom of another structure. And is preferably bonded to a divalent hydrocarbon group having another structure.
- the total of T unit and Q unit The number of TnQn is 4% or less.
- the total number of M units, D units, T units, and Q units in total is 100. %,
- the TnQn is preferably 3% or less, more preferably 2% or less.
- the lower limit of TnQn is not particularly limited.
- the TnQn may be 0% (number is 0) or may exceed 0%.
- the TnQn can be calculated by performing 29 Si-solid NMR analysis of the resin particles. Specifically, it can be calculated as follows.
- TnQn Calculation method of TnQn: By using sufficiently dried resin particles, an integrated value of the signal amount of each unit can be obtained by 29 Si-solid NMR measurement (DD / MAS method) under the following measurement conditions. TnQn can be calculated from the integral value of the obtained signal amount of each unit.
- Measurement conditions for 29 Si-solid NMR measurement (DD / MAS method): Apparatus: “JNM-ECX400” manufactured by Jeol Resonance Observation nucleus: 29 Si Probe: 8 mm probe for solid-state NMR MAS rotation speed: 7 kHz Measuring method: Single pulse (DD / MAS) Pulse width: 3.45 ⁇ s ( 29 Si / 90 degrees) Delay time: 315 seconds Acquisition time: 21 milliseconds Scan count: 500 times
- the chemical shift of 29 Si-solid NMR derived from each unit is generally as follows.
- the chemical shift of 29 Si-solid NMR derived from each unit can be appropriately determined in consideration of an arbitrary group bonded to the Si group.
- the compression recovery rate when the resin particles are 40% compressed and deformed is preferably 10%.
- it is more preferably 9% or less, preferably 0.1% or more, more preferably 1% or more.
- the compression recovery rate when the resin particles are 40% compressed and deformed can be measured as follows.
- the resin particle is compressed and deformed by 40% in the center direction of the resin particle at 25 ° C. on a smooth indenter end face of a cylinder (diameter 100 ⁇ m, made of diamond) using a micro compression tester. Apply a load (reverse load value). Thereafter, unloading is performed up to the origin load value (0.40 mN). The load-compression displacement during this period is measured, and the compression recovery rate when 40% compressive deformation at 25 ° C. can be obtained from the following formula.
- the load speed is 0.33 mN / sec.
- the above-mentioned micro compression tester for example, “Micro compression tester MCT-W200” manufactured by Shimadzu Corporation, “Fischer Scope H-100” manufactured by Fisher, etc. are used.
- Compression recovery rate (%) [L2 / L1] ⁇ 100
- L1 Compressive displacement from the origin load value to the reverse load value when applying a load
- L2 Unloading displacement from the reverse load value to the origin load value when releasing the load
- the 10% K value of the resin particles is preferably 5 N / mm 2 or more, more preferably 10 N / mm 2 or more, preferably 500 N / mm 2 or less, more preferably 200 N / mm 2 or less, and even more preferably 150 N. / Mm 2 or less, particularly preferably 100 N / mm 2 or less.
- the 10% K value of the resin particles is not less than the above lower limit and not more than the above upper limit, the internal stress can be more effectively relaxed, and the occurrence of spring back can be more effectively suppressed. it can.
- the 10% K value of the resin particles can be measured as follows.
- one resin particle is compressed on a smooth indenter end face of a cylinder (diameter 100 ⁇ m, made of diamond) at 25 ° C. under conditions of a compression rate of 0.3 mN / sec and a maximum test load of 20 mN. .
- the load value (N) and compression displacement (mm) at this time are measured.
- the 10% K value at 25 ° C. can be determined by the following formula.
- the micro compression tester for example, “Micro compression tester MCT-W200” manufactured by Shimadzu Corporation, “Fischer Scope H-100” manufactured by Fisher, etc. are used.
- the 10% K value of the resin particles is preferably calculated by arithmetically averaging 10% K values of 50 resin particles selected arbitrarily.
- the above K value represents the hardness of the resin particles universally and quantitatively. By using the K value, the hardness of the resin particles can be expressed quantitatively and uniquely.
- the particle diameter of the resin particles can be appropriately set according to the application.
- the particle diameter of the resin particles is preferably 0.5 ⁇ m or more, more preferably 1 ⁇ m or more, preferably 500 ⁇ m or less, more preferably 450 ⁇ m or less, still more preferably 100 ⁇ m or less, still more preferably 50 ⁇ m or less, particularly preferably. 20 ⁇ m or less.
- the particle diameter of the resin particles is not less than the above lower limit and not more than the above upper limit, the internal stress can be alleviated more effectively, and the occurrence of spring back can be more effectively suppressed.
- the particle diameter of the resin particles is 0.5 ⁇ m or more and 20 ⁇ m or less, the resin particles can be suitably used for a stress relaxation material.
- the particle diameter of the resin particles is 1 ⁇ m or more and 100 ⁇ m or less, the resin particles can be suitably used for a gap control material.
- the particle diameter of the resin particles indicates a diameter when the resin particles are spherical, and indicates a maximum diameter when the resin particles are not spherical.
- the particle diameter of the resin particles is preferably an average particle diameter, and more preferably a number average particle diameter.
- the particle diameter of the resin particles is determined using a particle size distribution measuring device or the like.
- a particle size distribution measuring apparatus using principles such as laser scattered light, electrical resistance value change, and image analysis after imaging can be used.
- a method for measuring the particle size of the resin particles for example, using a particle size distribution measuring device (“Multizer 4” manufactured by Beckman Coulter, Inc.), the particle size of about 100,000 resin particles is measured, and the average value is measured. The method etc. of calculating are mentioned.
- the particle diameter of the resin particles is preferably obtained by observing 50 arbitrary resin particles with an electron microscope or an optical microscope and calculating an average value.
- the coefficient of variation (CV value) of the particle diameter of the resin particles is preferably 10% or less, more preferably 7% or less, and even more preferably 5% or less.
- the resin particles can be suitably used for applications of stress relaxation materials or gap control materials.
- the coefficient of variation (CV value) can be measured as follows.
- CV value (%) ( ⁇ / Dn) ⁇ 100 ⁇ : standard deviation of particle diameter of resin particles Dn: average value of particle diameter of resin particles
- the shape of the resin particles is not particularly limited.
- the resin particles may have a spherical shape or a shape other than a spherical shape such as a flat shape.
- the use of the resin particles is not particularly limited.
- the resin particles are suitably used for various applications.
- the resin particles are preferably used as spacers.
- Examples of the method of using the spacer include a liquid crystal display element spacer, a gap control spacer, and a stress relaxation spacer.
- the above spacer for gap control is used for gap control of laminated chips for ensuring standoff height and flatness, and for optical component gap control for ensuring smoothness of the glass surface and thickness of the adhesive layer.
- the stress relaxation spacer can be used for stress relaxation of a sensor chip or the like, and stress relaxation of a connection portion connecting two connection target members.
- the stress relaxation spacer can be used for a connection material for power devices, an adhesive for sensors, and the like.
- the spacer is preferably used as a connection material for power devices, and is preferably used as an adhesive for sensors.
- the resin particles are preferably used as spacers for liquid crystal display elements, and are preferably used as peripheral sealing agents for liquid crystal display elements.
- the resin particles preferably function as a spacer. Since the resin particles have good compressive deformation characteristics, when the resin particles are used as spacers and are arranged between the substrates, the spacers are efficiently arranged between the substrates. Furthermore, since the resin particles can suppress damage to the liquid crystal display element member and the like, display defects are unlikely to occur in the liquid crystal display element using the liquid crystal display element spacer.
- the resin particles are also suitably used as an inorganic filler, a toner additive, a shock absorber or a vibration absorber.
- the resin particles can be used as a substitute for rubber or a spring.
- the material of the silicone resin is preferably a silane compound having a radical polymerizable group and a silane compound having a hydrophobic group having 5 or more carbon atoms, and has a radical polymerizable group and a hydrophobic group having 5 or more carbon atoms. It is preferable that it is a silane compound having a radical polymerizable group at both ends. When these materials are reacted, a siloxane bond is formed. In the resulting silicone resin, radically polymerizable groups and hydrophobic groups having 5 or more carbon atoms generally remain.
- particles containing the silicone resin having a particle diameter of 1 ⁇ m or more and 200 ⁇ m or less can be easily obtained, and the chemical resistance of the particles containing the silicone resin can be increased and the permeability can be increased. Wetness can be lowered.
- the radical polymerizable group is preferably directly bonded to a silicon atom.
- the silane compound which has the said radical polymerizable group only 1 type may be used and 2 or more types may be used together.
- the silane compound having a radical polymerizable group is preferably an alkoxysilane compound.
- examples of the silane compound having a radical polymerizable group include vinyltrimethoxysilane, vinyltriethoxysilane, dimethoxymethylvinylsilane, diethoxymethylvinylsilane, divinylmethoxyvinylsilane, divinylethoxyvinylsilane, divinyldimethoxysilane, divinyldiethoxysilane, and 1 , 3-divinyltetramethyldisiloxane and the like.
- the hydrophobic group having 5 or more carbon atoms is preferably directly bonded to a silicon atom. Only 1 type may be used for the said silane compound which has a C5 or more hydrophobic group, and 2 or more types may be used together.
- the silane compound having a hydrophobic group having 5 or more carbon atoms is preferably an alkoxysilane compound.
- Examples of the silane compound having a hydrophobic group having 5 or more carbon atoms include phenyltrimethoxysilane, dimethoxymethylphenylsilane, diethoxymethylphenylsilane, dimethylmethoxyphenylsilane, dimethylethoxyphenylsilane, hexaphenyldisiloxane, 1,3, 3,5-tetramethyl-1,1,5,5-tetraphenyltrisiloxane, 1,1,3,5,5-pentaphenyl-1,3,5-trimethyltrisiloxane, hexaphenylcyclotrisiloxane, phenyl Examples include tris (trimethylsiloxy) silane and octaphenylcyclotetrasiloxane.
- the radical polymerizable group is preferably directly bonded to a silicon atom, and the hydrophobic group having 5 or more carbon atoms is bonded to a silicon atom. Direct bonding is preferred.
- the silane compound having a radical polymerizable group and having a hydrophobic group having 5 or more carbon atoms only one kind may be used, or two or more kinds may be used in combination.
- silane compound having a radical polymerizable group and a hydrophobic group having 5 or more carbon atoms examples include phenylvinyldimethoxysilane, phenylvinyldiethoxysilane, phenylmethylvinylmethoxysilane, phenylmethylvinylethoxysilane, and diphenylvinylmethoxysilane. , Diphenylvinylethoxysilane, phenyldivinylmethoxysilane, phenyldivinylethoxysilane, 1,1,3,3-tetraphenyl-1,3-divinyldisiloxane, and the like.
- the silane compound having the radical polymerizable group and the silane compound having a hydrophobic group having 5 or more carbon atoms are preferably used in a weight ratio of 1: 1 to 1:20, preferably 1: 5 to 1:15. More preferably, it is used.
- the ratio of the number of radical polymerizable groups to the number of hydrophobic groups having 5 or more carbon atoms is 1: 0.5 to 1:20.
- the ratio is preferably 1: 1 to 1:15.
- the particles containing the silicone resin preferably have a dimethylsiloxane skeleton in which two methyl groups are bonded to one silicon atom, and the material of the silicone resin is a silane compound in which two methyl groups are bonded to one silicon atom. It is preferable to contain. In this case, the internal stress can be more effectively reduced, and the occurrence of springback can be further effectively suppressed.
- the particles containing the silicone resin react the silane compound described above with a radical polymerization initiator.
- a radical polymerization initiator it is preferable to form a siloxane bond.
- particles containing a silicone resin having it is particularly difficult to obtain particles containing a silicone resin having
- the radical polymerization initiator and the silane compound having the above structure particles containing a silicone resin having a particle size of 1 ⁇ m or more and 500 ⁇ m or less can be obtained, and a silicone resin having a particle size of 10 ⁇ m or more is obtained. It is also possible to obtain particles containing a silicone resin having a particle diameter of 100 ⁇ m or less.
- a silane compound having a hydrogen atom bonded to a silicon atom may not be used.
- the silane compound can be polymerized using a radical polymerization initiator without using a metal catalyst.
- the particles containing the silicone resin can be prevented from containing a metal catalyst, the content of the metal catalyst in the particles containing the silicone resin can be reduced, and the internal stress can be made more effective. Therefore, the occurrence of springback can be more effectively suppressed.
- the resin particles are resin particles that include a silicone resin and a resin different from the silicone resin, and the outer surface of the silicone resin is covered with a resin different from the silicone resin. It is preferable.
- the particles containing the silicone resin include a silicone resin and a resin different from the silicone resin, and the outer surface of the silicone resin is covered with a resin different from the silicone resin. It is preferable that
- the entire outer surface of the silicone resin may be covered with a resin different from the silicone resin. May be uncovered by different resins.
- Examples of the resin different from the silicone resin include a resin having a vinyl group (vinyl resin). Only 1 type of resin different from the said silicone resin may be used, and 2 or more types may be used together.
- the resin different from the silicone resin is preferably a resin having a vinyl group, and more preferably dibilbenzene or styrene.
- particles containing the silicone resin are prepared by performing a polymerization reaction of the silane compound by a suspension polymerization method, a dispersion polymerization method, a mini-emulsion polymerization method, or an emulsion polymerization method. And the like. After the polymerization of the silane compound proceeds to obtain an oligomer, a polymerization reaction of the silane compound that is a polymer (oligomer or the like) is performed by a suspension polymerization method, a dispersion polymerization method, a miniemulsion polymerization method, or an emulsion polymerization method, You may produce the particle
- a silane compound having a vinyl group bonded to a silicon atom at the terminal may be obtained by polymerizing a silane compound having a vinyl group.
- a silane compound having a phenyl group may be polymerized to obtain a silane compound having a phenyl group bonded to a silicon atom in the side chain as a polymer (oligomer or the like).
- a silane compound having a vinyl group and a silane compound having a phenyl group are polymerized to form a polymer (such as an oligomer) having a vinyl group bonded to a silicon atom at a terminal and a phenyl group bonded to a silicon atom in a side chain You may obtain the silane compound which has this.
- connection material is used to form a connection part that connects two connection target members.
- the connection material includes the resin particles described above and binder or metal atom-containing particles.
- the connection material is preferably used for forming the connection portion by a sintered body of metal atom-containing particles.
- the binder does not include the resin particles according to the present invention.
- the metal atom-containing particles do not include the resin particles according to the present invention.
- the thermal decomposition temperature of the resin particles is higher than the melting point of the metal atom-containing particles.
- the thermal decomposition temperature of the resin particles is preferably 10 ° C. or higher, more preferably 30 ° C. or higher, and most preferably 50 ° C. or higher than the melting point of the metal atom-containing particles.
- the metal atom-containing particles include metal particles and metal compound particles.
- the metal compound particle includes a metal atom and an atom other than the metal atom.
- Specific examples of the metal compound particles include metal oxide particles, metal carbonate particles, metal carboxylate particles, and metal complex particles.
- the metal compound particles are preferably metal oxide particles.
- the metal oxide particles are sintered after becoming metal particles by heating at the time of connection in the presence of a reducing agent.
- the metal oxide particles are metal particle precursors.
- the metal carboxylate particles include metal acetate particles.
- the metal constituting the metal particle and the metal oxide particle examples include silver, copper, and gold.
- the metal constituting the metal particles and the metal oxide particles is preferably silver or copper, and particularly preferably silver. Therefore, the metal particles are preferably silver particles or copper particles, and more preferably silver particles.
- the metal oxide particles are preferably silver oxide particles or copper oxide particles, and more preferably silver oxide particles. When silver particles and silver oxide particles are used, the residue can be reduced after connection, and the volume reduction rate can also be made very small. Examples of the silver oxide in the silver oxide particles include Ag 2 O and AgO.
- the metal atom-containing particles are preferably sintered by heating at less than 400 ° C.
- the temperature at which the metal atom-containing particles are sintered (sintering temperature) is more preferably 350 ° C. or lower, and preferably 300 ° C. or higher.
- sintering temperature is more preferably 350 ° C. or lower, and preferably 300 ° C. or higher.
- a reducing agent is used when the metal atom-containing particles are metal oxide particles.
- the reducing agent include alcohol compounds (compounds having an alcoholic hydroxyl group), carboxylic acid compounds (compounds having a carboxy group), amine compounds (compounds having an amino group), and the like.
- the said reducing agent only 1 type may be used and 2 or more types may be used together.
- Examples of the alcohol compound include alkyl alcohols. Specific examples of the alcohol compound include, for example, ethanol, propanol, butyl alcohol, pentyl alcohol, hexyl alcohol, heptyl alcohol, octyl alcohol, nonyl alcohol, decyl alcohol, undecyl alcohol, dodecyl alcohol, tridecyl alcohol, tetradecyl alcohol. , Pentadecyl alcohol, hexadecyl alcohol, heptadecyl alcohol, octadecyl alcohol, nonadecyl alcohol and icosyl alcohol.
- the alcohol compound is not limited to a primary alcohol type compound, but a secondary alcohol type compound, a tertiary alcohol type compound, an alkanediol, and an alcohol compound having a cyclic structure can also be used. Further, as the alcohol compound, a compound having a large number of alcohol groups such as ethylene glycol and triethylene glycol may be used. Moreover, you may use compounds, such as a citric acid, ascorbic acid, and glucose, as said alcohol compound.
- Examples of the carboxylic acid compound include alkyl carboxylic acids.
- Specific examples of the carboxylic acid compound include butanoic acid, pentanoic acid, hexanoic acid, heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, dodecanoic acid, tridecanoic acid, tetradecanoic acid, pentadecanoic acid, hexadecanoic acid, heptadecane.
- Examples include acids, octadecanoic acid, nonadecanoic acid and icosanoic acid.
- the carboxylic acid compound is not limited to a primary carboxylic acid type compound, and a secondary carboxylic acid type compound, a tertiary carboxylic acid type compound, a dicarboxylic acid, and a carboxyl compound having a cyclic structure can also be used.
- Examples of the amine compound include alkylamines. Specific examples of the amine compound include butylamine, pentylamine, hexylamine, heptylamine, octylamine, nonylamine, decylamine, undecylamine, dodecylamine, tridecylamine, tetradecylamine, pentadecylamine, hexadecylamine, Examples include heptadecylamine, octadecylamine, nonadecylamine and icodecylamine.
- the amine compound may have a branched structure.
- Examples of the amine compound having a branched structure include 2-ethylhexylamine and 1,5-dimethylhexylamine.
- the amine compound is not limited to a primary amine type compound, and a secondary amine type compound, a tertiary amine type compound, and an amine compound having a cyclic structure can also be used.
- the reducing agent may be an organic substance having an aldehyde group, an ester group, a sulfonyl group or a ketone group, or an organic substance such as a carboxylic acid metal salt. While the carboxylic acid metal salt is used as a precursor of metal particles, it also contains an organic substance, so that it is also used as a reducing agent for metal oxide particles.
- the content of the reducing agent is preferably 1 part by weight or more, more preferably 10 parts by weight or more, preferably 1000 parts by weight or less, more preferably 500 parts by weight with respect to 100 parts by weight of the metal oxide particles. Hereinafter, it is more preferably 100 parts by weight or less.
- the content of the reducing agent is not less than the above lower limit, the metal atom-containing particles can be sintered more densely. As a result, heat dissipation and heat resistance in the connection portion formed by the sintered body of the metal atom-containing particles are also increased.
- connection temperature the sintering temperature of the metal atom-containing particles
- the particles tend to aggregate at the time of connection and voids are likely to occur at the connection part.
- the carboxylic acid metal salt By using the carboxylic acid metal salt, the carboxylic acid metal salt is not melted by heating at the time of connection, so that generation of voids can be suppressed.
- a metal compound containing an organic substance may be used as the reducing agent.
- the connection material preferably contains a binder.
- the binder is not particularly limited.
- a known insulating resin is used as the binder.
- the binder preferably includes a thermoplastic component (thermoplastic compound) or a curable component, and more preferably includes a curable component.
- the curable component include a photocurable component and a thermosetting component. It is preferable that the said photocurable component contains a photocurable compound and a photoinitiator.
- the thermosetting component preferably contains a thermosetting compound and a thermosetting agent.
- the binder include vinyl resins, thermoplastic resins, curable resins, thermoplastic block copolymers, and elastomers. As for the said binder, only 1 type may be used and 2 or more types may be used together.
- thermoplastic block copolymer examples include a styrene-butadiene-styrene block copolymer, a styrene-isoprene-styrene block copolymer, a hydrogenated product of a styrene-butadiene-styrene block copolymer, and a styrene-isoprene. -Hydrogenated products of styrene block copolymers.
- the elastomer examples include styrene-butadiene copolymer rubber and acrylonitrile-styrene block copolymer rubber.
- the binder may be a solvent.
- the solvent include water and organic solvents. From the viewpoint of further improving the removability of the solvent, the solvent is preferably an organic solvent.
- the organic solvent include alcohol compounds such as ethanol; ketone compounds such as acetone, methyl ethyl ketone, and cyclohexanone; aromatic hydrocarbon compounds such as toluene, xylene, and tetramethylbenzene; cellosolve, methyl cellosolve, butyl cellosolve, carbitol, and methylcarbitol.
- Glycol ether compounds such as butyl carbitol, propylene glycol monomethyl ether, dipropylene glycol monomethyl ether, dipropylene glycol diethyl ether, tripropylene glycol monomethyl ether; ethyl acetate, butyl acetate, butyl lactate, cellosolve acetate, butyl cellosolve acetate, carbitol Acetate, butyl carbitol acetate, propylene glycol monomethyl ether acetate , Dipropylene glycol monomethyl ether acetate, ester compounds such as propylene carbonate; octane, aliphatic hydrocarbon compounds decane; and petroleum ether, petroleum solvents such as naphtha.
- connection material preferably contains an epoxy resin.
- the content of the metal atom-containing particles in the connection material is the content of the resin particles. More than the amount, preferably 10% by weight or more, more preferably 20% by weight or more.
- the content of the resin particles in 100% by weight of the connection material is preferably 0.1% by weight or more, more preferably 1% by weight or more, preferably 50% by weight or less, more preferably 30% by weight or less. is there.
- the content of the resin particles is not less than the above lower limit and not more than the above upper limit, the internal stress in the connection portion can be more effectively alleviated.
- the content of the metal atom-containing particles is preferably 0.3% by weight or more, more preferably 3% by weight or more in 100% by weight of the connection material. , Preferably 50% by weight or less, more preferably 40% by weight or less.
- the content of the metal atom-containing particles is not less than the above lower limit and not more than the above upper limit, the connection resistance is further reduced.
- connection material contains a binder
- the content of the binder in 100% by volume of the connection material is preferably 5% by volume or more, more preferably 10% by volume or more, and preferably 40% by volume or less. Preferably it is 20 volume% or less.
- the content of the binder is not less than the above lower limit and not more than the above upper limit, the connection strength can be further effectively increased.
- connection structure can be obtained by connecting a connection object member using the connection material containing the resin particles and the binder or metal atom-containing particles.
- connection structure includes a first connection target member, a second connection target member, the first connection target member, and a connection portion that connects the second connection target member.
- the material of the connection part includes the resin particles described above.
- the material of the connection part is preferably the connection material described above. It is preferable that the connection part is a connection structure formed of the connection material described above.
- FIG. 1 is a cross-sectional view showing an example of a connection structure using resin particles according to the present invention.
- a connection structure 51 shown in FIG. 1 is a connection that connects a first connection target member 52, a second connection target member 53, and the first connection target member 52 and the second connection target member 53. Part 54.
- the connection part 54 includes the resin particles 1 described above.
- the resin particle 1 is not in contact with both the first and second connection target members 52 and 53.
- the resin particle 1 is used as a stress relaxation spacer.
- the resin particles 1 are schematically shown for convenience of illustration.
- the connection portion 54 includes gap control particles 61 and a metal connection portion 62.
- one gap control particle 61 is in contact with both the first and second connection target members 52 and 53.
- the gap control particles 61 may be conductive particles or non-conductive particles.
- the metal connection part 62 is a sintered body of metal atom-containing particles.
- the metal connection portion 62 is formed by sintering metal atom-containing particles.
- the metal connection part 62 is formed by melting and solidifying the metal atom-containing particles.
- the metal connection part 62 is a molten solidified product of metal atom-containing particles.
- the first connection object member may have a first electrode on the surface.
- the second connection target member may have a second electrode on the surface. It is preferable that the first electrode and the second electrode are electrically connected by the connecting portion.
- the manufacturing method of the connection structure is not particularly limited.
- a method of heating and pressurizing the laminate after arranging the connection material between the first connection target member and the second connection target member to obtain a laminate Etc a method of heating and pressurizing the laminate after arranging the connection material between the first connection target member and the second connection target member to obtain a laminate Etc.
- the pressurizing pressure is about 9.8 ⁇ 10 4 to 4.9 ⁇ 10 6 Pa.
- the heating temperature is about 120 to 220 ° C.
- the pressure applied to connect the electrode of the flexible printed board, the electrode disposed on the resin film, and the electrode of the touch panel is about 9.8 ⁇ 10 4 to 1.0 ⁇ 10 6 Pa.
- connection target member examples include electronic components such as a semiconductor chip, a capacitor, and a diode, and electronic components such as a circuit board such as a printed board, a flexible printed board, a glass epoxy board, and a glass board.
- the connection target member is preferably an electronic component.
- At least one of the first connection target member and the second connection target member is preferably a semiconductor wafer or a semiconductor chip.
- the connection structure is preferably a semiconductor device.
- connection target member is preferably a flexible substrate or a connection target member in which electrodes are arranged on the surface of the resin film.
- the connection target member is preferably a flexible substrate, and is preferably a connection target member in which an electrode is disposed on the surface of the resin film.
- the flexible substrate is a flexible printed substrate or the like, the flexible substrate generally has electrodes on the surface.
- the electrode provided on the connection target member examples include metal electrodes such as a gold electrode, a nickel electrode, a tin electrode, an aluminum electrode, a copper electrode, a silver electrode, a molybdenum electrode, and a tungsten electrode.
- the electrode is preferably a gold electrode, a nickel electrode, a tin electrode, or a copper electrode.
- the connection target member is a glass substrate, the electrode is preferably an aluminum electrode, a copper electrode, a molybdenum electrode, or a tungsten electrode.
- the said electrode is an aluminum electrode, the electrode formed only with aluminum may be sufficient and the electrode by which the aluminum layer was laminated
- the material for the metal oxide layer include indium oxide doped with a trivalent metal element and zinc oxide doped with a trivalent metal element. Examples of the trivalent metal element include Sn, Al, and Ga.
- the resin particles can be suitably used as a spacer for a liquid crystal display element.
- the first connection target member may be a first liquid crystal display element member.
- the second connection target member may be a second liquid crystal display element member.
- the connection portion includes the first liquid crystal display element member and the second liquid crystal display element member in a state where the first liquid crystal display element member and the second liquid crystal display element member face each other. It may be a seal portion that seals the outer periphery.
- the resin particles can also be used as a sealing agent for liquid crystal display elements.
- the liquid crystal display element includes a first liquid crystal display element member, a second liquid crystal display element member, a seal portion, and a liquid crystal.
- the seal portion includes the first liquid crystal display element member and the second liquid crystal display element member in a state where the first liquid crystal display element member and the second liquid crystal display element member face each other. The outer periphery is sealed.
- the liquid crystal is disposed between the first liquid crystal display element member and the second liquid crystal display element member inside the seal portion.
- a liquid crystal dropping method is applied, and the seal portion is formed by thermosetting a sealing agent for a liquid crystal dropping method.
- a liquid crystal display element 81 shown in FIG. 2 has a pair of transparent glass substrates 82.
- the transparent glass substrate 82 has an insulating film (not shown) on the opposing surface. Examples of the material for the insulating film include SiO 2 .
- a transparent electrode 83 is formed on the insulating film in the transparent glass substrate 82. Examples of the material of the transparent electrode 83 include ITO.
- the transparent electrode 83 can be formed by patterning, for example, by photolithography.
- An alignment film 84 is formed on the transparent electrode 83 on the surface of the transparent glass substrate 82. Examples of the material of the alignment film 84 include polyimide.
- a liquid crystal 85 is sealed between the pair of transparent glass substrates 82.
- a plurality of resin particles 1 are arranged between the pair of transparent glass substrates 82.
- the resin particle 1 is used as a spacer for a liquid crystal display element.
- the distance between the pair of transparent glass substrates 82 is regulated by the plurality of resin particles 1.
- a sealing agent 86 is disposed between the edges of the pair of transparent glass substrates 82. Outflow of the liquid crystal 85 to the outside is prevented by the sealing agent 86.
- the sealing agent 86 includes resin particles 1A that differ from the resin particles 1 only in particle size. In FIG. 2, the resin particles 1 and 1A are schematically shown for convenience of illustration.
- the arrangement density of spacers for liquid crystal display elements per 1 mm 2 is preferably 10 pieces / mm 2 or more, and preferably 1000 pieces / mm 2 or less.
- the arrangement density is 10 pieces / mm 2 or more, the cell gap becomes even more uniform.
- the arrangement density is 1000 / mm 2 or less, the contrast of the liquid crystal display element is further improved.
- aqueous solution B was prepared by mixing 80 parts by weight of a 5 wt% aqueous solution of “GOHSENOL GH-20” manufactured by Synthetic Chemical Co., Ltd. After the said solution A was put into the separable flask installed in the warm bath, the said aqueous solution B was added.
- connection material 40 parts by weight of silver particles (average particle diameter 15 nm), 1 part by weight of divinylbenzene resin particles (average particle diameter 30 ⁇ m, CV value 5%), 10 parts by weight of the resin particles A and a solvent 40 parts by weight of toluene was blended and mixed to prepare a connection material.
- connection material was applied on the second connection target member so as to have a thickness of about 30 ⁇ m to form a connection material layer. Then, the said 1st connection object member was laminated
- liquid crystal display elements 1 part by weight of spacer particles (average particle size 5 ⁇ m, “Micropearl SP-205” manufactured by Sekisui Chemical Co., Ltd.) is blended with 100 parts by weight of the obtained sealing agent, and the sealing agent is used using a planetary stirrer. The spacer particles were uniformly dispersed therein. The obtained spacer particle-containing sealing agent was filled into a dispensing syringe (“PSY-10E” manufactured by Musashi Engineering Co., Ltd.) and subjected to defoaming treatment.
- PSY-10E dispensing syringe
- a spacer particle-containing sealing agent was applied using a dispenser (“SHOTMASTER300” manufactured by Musashi Engineering Co., Ltd.) so as to draw a rectangular frame on the transparent electrode substrate on which the ITO thin film was formed.
- a dispenser (“SHOTMASTER300” manufactured by Musashi Engineering Co., Ltd.) so as to draw a rectangular frame on the transparent electrode substrate on which the ITO thin film was formed.
- fine droplets of TN liquid crystal (“JC-5001LA” manufactured by Chisso Corporation) were dropped onto the inside of the rectangle coated with the spacer particle-containing sealing agent on the transparent electrode substrate.
- the transparent electrode substrate on which the sealing agent and TN liquid crystal were applied and the transparent electrode substrate on which the sealing agent and TN liquid crystal were not applied were bonded together under a vacuum of 5 Pa using a vacuum bonding apparatus.
- Example 2 Resin particles were produced in the same manner as in Example 1 except that “X-22-1602” manufactured by Shin-Etsu Chemical Co., Ltd. was used instead of “X-22-2445” manufactured by Shin-Etsu Chemical Co., Ltd. B (silicone particle B) was obtained. A connection material, a connection structure, and a liquid crystal display element were obtained in the same manner as in Example 1 except that the resin particle A was changed to the resin particle B.
- Example 3 Production of resin particles C (resin-coated silicone particles C)
- resin particles A silicone particles A obtained in Example 1
- 0.6 parts by weight of hexadecyltrimethylammonium bromide, 240 parts by weight of distilled water and 120 parts by weight of methanol were added and stirred at 40 ° C. for 1 hour.
- 3.0 parts by weight of divinylbenzene and 0.5 parts by weight of styrene were added to the separable flask, heated to 75 ° C., and stirred for 0.5 hours.
- a connecting material, a connecting structure, and a liquid crystal display element were obtained in the same manner as in Example 1 except that the resin particle A was changed to the resin particle C.
- Example 2 In the same manner as in Example 1 except that silicone powder “KMP-590” (manufactured by Shin-Etsu Chemical Co., Ltd.) was used in place of the resin particles A when producing the connection material and the liquid crystal display element, A connection structure and a liquid crystal display element were obtained.
- silicone powder “KMP-590” manufactured by Shin-Etsu Chemical Co., Ltd.
- TnQn Total number of T units and Q units
- TnQn The total number of the T unit and the Q unit (TnQn) in 100% of the total number of the M unit, the D unit, the T unit, and the Q unit was analyzed by 29 Si-solid NMR analysis. It was calculated by the method.
- connection strength The connection strength at 260 ° C. of the obtained connection structure was measured using a mount strength measuring device. Connection strength was determined according to the following criteria.
- Shear strength is 150 N / cm 2 or more
- Shear strength is 100 N / cm 2 or more and less than 150 N / cm 2
- Shear strength is less than 100 N / cm 2
- Springback With a scanning electron microscope, it was observed whether or not springback occurred at the connection portion of the obtained connection structure. Springback was determined according to the following criteria.
- connection reliability The obtained connection structure was heated from ⁇ 65 ° C. to 150 ° C. and cooled to ⁇ 65 ° C., and a cooling cycle test was performed for 1000 cycles. With an ultrasonic flaw detector (SAT), the presence or absence of cracks and delamination was observed at the connection part.
- the thermal cycle characteristics (connection reliability) were determined according to the following criteria.
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Abstract
Description
本発明に係る樹脂粒子は、一般式:[(R)3SiO1/2]で表されるM単位、一般式:[(R)2SiO2/2]で表されるD単位、一般式:[(R)SiO3/2]で表されるT単位及び一般式:[SiO4/2]で表されるQ単位の合計の全個数100%中、上記T単位及び上記Q単位の合計の個数が、4%以下である。なお、M単位、D単位、T単位、及びQ単位が、上記の一般式で表されることは、公知である。上記一般式におけるRは、任意の基を表す。Rの任意の基として、上記一般式の単位外のSiに結合しているO1/2基は除かれる。
十分に乾燥させた樹脂粒子を用いて、下記測定条件における29Si-固体NMR測定(DD/MAS法)により、上記の各単位のシグナル量の積分値を得ることができる。得られた上記の各単位のシグナル量の積分値からTnQnを算出することができる。
装置:Jeol Resonance社製「JNM-ECX400」
観測核:29Si
プローブ:固体NMR用8mmプローブ
MAS回転数:7kHz
測定法:Single pulse(DD/MAS)
パルス幅:3.45μ秒(29Si/90度)
遅延時間:315秒
取り込み時間:21ミリ秒
スキャン回数:500回
D単位:-30ppm~-5ppm
T単位:-75ppm~-50ppm
Q単位:-120ppm~-100ppm
L1:負荷を与えるときの原点用荷重値から反転荷重値に至るまでの圧縮変位
L2:負荷を解放するときの反転荷重値から原点用荷重値に至るまでの除荷変位
F:樹脂粒子が10%圧縮変形したときの荷重値(N)
S:樹脂粒子が10%圧縮変形したときの圧縮変位(mm)
R:樹脂粒子の半径(mm)
ρ:樹脂粒子の粒子径の標準偏差
Dn:樹脂粒子の粒子径の平均値
内部応力をより一層効果的に緩和する観点、及びスプリングバックの発生をより一層効果的に抑制する観点からは、上記樹脂粒子は、シリコーン樹脂を含む粒子であることが好ましい。
上記接続材料は、2つの接続対象部材を接続する接続部を形成するために用いられる。上記接続材料は、上述した樹脂粒子と、バインダー又は金属原子含有粒子とを含む。上記接続材料は、金属原子含有粒子の焼結体によって、上記接続部を形成するために用いられることが好ましい。上記バインダーには、本発明に係る樹脂粒子は含まれない。上記金属原子含有粒子には、本発明に係る樹脂粒子は含まれない。
上述した樹脂粒子とバインダー又は金属原子含有粒子とを含む接続材料を用いて、接続対象部材を接続することにより、接続構造体を得ることができる。
(1)樹脂粒子A(シリコーン粒子A)の作製
両末端アクリルシリコーンオイル(信越化学工業社製「X-22-2445」)30重量部に、tert-ブチル-2-エチルペルオキシヘキサノアート(重合開始剤、日油社製「パーブチルO」)0.5重量部を溶解させた溶解液Aを用意した。また、イオン交換水150重量部に、ラウリル硫酸トリエタノールアミン塩40重量%水溶液(乳化剤)0.8重量部とポリビニルアルコール(重合度:約2000、けん化度:86.5~89モル%、日本合成化学社製「ゴーセノールGH-20」)の5重量%水溶液80重量部とを混合して、水溶液Bを用意した。温浴槽中に設置したセパラブルフラスコに、上記溶解液Aを入れた後、上記水溶液Bを添加した。その後、Shirasu Porous Glass(SPG)膜(細孔平均径約5μm)を用いることで、乳化を行った。その後、85℃に昇温して、9時間重合を行った。重合後の粒子の全量を遠心分離により水洗浄した後、分級操作を行った後、凍結乾燥させて樹脂粒子A(シリコーン粒子A)を得た。
銀粒子(平均粒子径15nm)40重量部と、ジビニルベンゼン樹脂粒子(平均粒子径30μm、CV値5%)1重量部と、上記樹脂粒子A10重量部と、溶媒であるトルエン40重量部とを配合し、混合して接続材料を作製した。
第1の接続対象部材として、パワー半導体素子を用意した。第2の接続対象部材として、窒化アルミニウム基板を用意した。
液晶滴下工法用シール剤の作製:
以下の材料を用意した。
樹脂粒子A(シリコーン粒子A)30重量部
ビスフェノールA型エポキシメタクリレート(熱硬化性化合物、ダイセル・オルネクス社製「KRM7985」)50重量部
カプロラクトン変性ビスフェノールA型エポキシアクリレート(熱硬化性化合物、ダイセル・オルネクス社製「EBECRYL3708」)20重量部
部分アクリル変性ビスフェノールE型エポキシ樹脂(熱硬化性化合物、ダイセル・オルネクス社製「KRM8276」)30重量部
2,2-ジメトキシ-2-フェニルアセトフェノン(光ラジカル重合開始剤、BASF Japan社製「IRGACURE651」)2重量部
マロン酸ジヒドラジド(熱硬化剤、大塚化学社製「MDH」)10重量部
シリカ(充填剤、アドマテックス社製「アドマファインSO-C2」)20重量部
3-グリシドキシプロピルトリメトキシシラン(シランカップリング剤、信越化学工業社製「KBM-403」)2重量部
得られたシール剤100重量部に対して、スペーサ粒子(平均粒子径5μm、積水化学工業社製「ミクロパールSP-205」)1重量部を配合し、遊星式撹拌装置を用いて、シール剤中にスペーサ粒子を均一に分散させた。得られたスペーサ粒子含有シール剤をディスペンス用シリンジ(武蔵エンジニアリング社製「PSY-10E」)に充填し、脱泡処理を行った。その後、ディスペンサー(武蔵エンジニアリング社製「SHOTMASTER300」)を用いて、ITO薄膜が形成された透明電極基板上に長方形の枠を描くように、スペーサ粒子含有シール剤を塗布した。次いで、液晶滴下装置を用いて、TN液晶(チッソ社製「JC-5001LA」)の微小滴を、透明電極基板のスペーサ粒子含有シール剤が塗布された長方形の内側に滴下して塗布した。シール剤及びTN液晶が塗布された透明電極基板と、シール剤及びTN液晶が塗布されていない透明電極基板を、真空貼り合わせ装置を用いて5Paの真空下にて貼り合わせた。次いで、シール剤を塗布した部分にメタルハライドランプを用いて100mW/cm2の紫外線を30秒照射した後、120℃で1時間加熱してシール剤を熱硬化させ、液晶表示素子(セルギャップ5μm)を得た。
樹脂粒子を作製する際に、信越化学工業社製「X-22-2445」の代わりに信越化学工業社製「X-22-1602」を用いたこと以外は実施例1と同様にして樹脂粒子B(シリコーン粒子B)を得た。樹脂粒子Aを樹脂粒子Bに変更したこと以外は、実施例1と同様にして、接続材料、接続構造体及び液晶表示素子を得た。
(1)樹脂粒子C(樹脂被覆シリコーン粒子C)の作製
温浴槽内に設置した500mlのセパラブルフラスコに、実施例1で得られた樹脂粒子A(シリコーン粒子A)6.5重量部と、ヘキサデシルトリメチルアンモニウムブロミド0.6重量部と、蒸留水240重量部と、メタノール120重量部とを入れ、40℃で1時間攪拌した。次いで、ジビニルベンゼン3.0重量部とスチレン0.5重量部とをセパラブルフラスコ内に添加して、75℃まで昇温し、0.5時間攪拌した。次いで、2,2’-アゾビス(イソ酪酸)ジメチル0.4重量部をセパラブルフラスコ内に添加して、8時間攪拌し、重合反応させた。重合反応後、遠心分離を行うことで得られた粒子を水洗浄して、樹脂粒子C(樹脂被覆シリコーン粒子C)を得た。
接続材料及び液晶表示素子を作製する際に、樹脂粒子Aの代わりにシリコーンパウダー「KMP-605」(信越化学工業社製)を用いたこと以外は、実施例1と同様にして、接続材料、接続構造体及び液晶表示素子を得た。
接続材料及び液晶表示素子を作製する際に、樹脂粒子Aの代わりにシリコーンパウダー「KMP-590」(信越化学工業社製)を用いたこと以外は、実施例1と同様にして、接続材料、接続構造体及び液晶表示素子を得た。
(1)T単位及びQ単位の合計の個数(TnQn)
上記M単位、上記D単位、上記T単位及び上記Q単位の合計の個数100%中、上記T単位及び上記Q単位の合計の個数(TnQn)を、29Si-固体NMR分析することにより、上述した方法で算出した。
得られた樹脂粒子の粒子径を、粒度分布測定装置(ベックマンコールター社製「Multisizer4」)を用いて、約100000個の樹脂粒子の粒子径を測定し、平均値を算出することにより求めた。
得られた樹脂粒子の変動係数を、上述した方法で測定した。
得られた樹脂粒子の10%K値を、上述した方法で測定した。
得られた樹脂粒子の40%圧縮変形させた際の圧縮回復率を、上述した方法で測定した。
マウント強度測定装置を用いて、得られた接続構造体の260℃での接続強度を測定した。接続強度を以下の基準で判定した。
○○:シェア強度が150N/cm2以上
〇:シェア強度が100N/cm2以上、150N/cm2未満
×:シェア強度が100N/cm2未満
走査型電子顕微鏡により、得られた接続構造体の接続部においてスプリングバックが発生しているか否かを観察した。スプリングバックを以下の基準で判定した。
○:スプリングバックが発生していない
×:スプリングバックが発生している
走査型電子顕微鏡により、得られた接続構造体の接続部においてクラックが発生しているか否かを観察した。内部応力緩和特性を以下の基準で判定した。
○:クラックが発生していない
×:クラックが発生している
得られた接続構造体を、-65℃から150℃に加熱し、-65℃に冷却する過程を1サイクルとする冷熱サイクル試験を1000サイクル実施した。超音波探傷装置(SAT)により、接続部においてクラック及び剥離の発生の有無を観察した。冷熱サイクル特性(接続信頼性)を以下の基準で判定した。
○:接続部にクラック及び剥離なし
×:接続部にクラック又は剥離がある
得られた液晶表示素子を温度80℃、湿度90%RHの環境下にて72時間保管した後、AC3.5Vの電圧駆動をさせ、中間調のシール部周辺を目視で観察した。透湿性を下記の基準で判定した。
○:シール部周辺に色むらなし
△:シール部周辺に色むらがわずかに発生
×:シール部周辺に目立つ色むらが発生
1A…樹脂粒子
51…接続構造体
52…第1の接続対象部材
53…第2の接続対象部材
54…接続部
61…ギャップ制御粒子
62…金属接続部
81…液晶表示素子
82…透明ガラス基板
83…透明電極
84…配向膜
85…液晶
86…シール剤
Claims (12)
- 一般式:[(R)3SiO1/2]で表されるM単位、一般式:[(R)2SiO2/2]で表されるD単位、一般式:[(R)SiO3/2]で表されるT単位及び一般式:[SiO4/2]で表されるQ単位の合計の全個数100%中、前記T単位及び前記Q単位の合計の個数が、4%以下である、樹脂粒子。
- 40%圧縮変形させた際の圧縮回復率が、10%以下である、請求項1に記載の樹脂粒子。
- 10%K値が、500N/mm2以下である、請求項1又は2に記載の樹脂粒子。
- 粒子径が、0.5μm以上500μm以下である、請求項1~3のいずれか1項に記載の樹脂粒子。
- シリコーン樹脂を含む粒子である、請求項1~4のいずれか1項に記載の樹脂粒子。
- スペーサとして用いられる、請求項1~5のいずれか1項に記載の樹脂粒子。
- 請求項1~6のいずれか1項に記載の樹脂粒子と、
バインダー又は金属原子含有粒子とを含む、接続材料。 - バインダーを含む、請求項7に記載の接続材料。
- 金属原子含有粒子を含む、請求項7又は8に記載の接続材料。
- 前記樹脂粒子の熱分解温度が、前記金属原子含有粒子の融点よりも高い、請求項9に記載の接続材料。
- 2つの接続対象部材を接続する接続部を形成するために用いられ、
前記金属原子含有粒子の焼結体によって、前記接続部を形成するために用いられる、請求項9又は10に記載の接続材料。 - 第1の接続対象部材と、
第2の接続対象部材と、
前記第1の接続対象部材と、前記第2の接続対象部材とを接続している接続部とを備え、
前記接続部の材料が、請求項1~6のいずれか1項に記載の樹脂粒子を含む、接続構造体。
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