Thin film polymer laminated capacitor and method for manufacturing the same

Abstract

A thin film polymer laminated capacitor is provided, which has a structure in which resin film layers and internal electrode metal layers are alternately laminated, wherein the resin film layers have a polymer structure formed by polymerizing a first monomer belonging to a multifunctional monomer and a second monomer belonging to a monofunctional monomer, wherein the first monomer and the second monomer satisfy at least one of the following conditions (a) and (b): (a) the HLB value H2 of the second monomer is smaller than the HLB value H1 of the first monomer; (b) a first polymer component formed by using only the first monomer as a monomer and a second polymer component formed by using only the second monomer as a monomer are manufactured according to the following manufacturing method (1), and each polymer component is subjected to a temperature test at 40°C and When the water absorption is measured after standing for 40 hours under a relative humidity of 95%, the water absorption of the second polymer component is less than the water absorption of the first polymer component, wherein the manufacturing method (1) includes the following steps: providing a first monomer or a second monomer as a test monomer; mixing a photoinitiator in a ratio of 0.2±0.01 mol relative to 100 mol of the test monomer to obtain a mixture; injecting the mixture into a disk; and irradiating the mixture injected into the disk with UV light at 120 W and a distance of 250 mm in a nitrogen atmosphere until polymerization no longer proceeds, thereby producing a disk-shaped polymer component having a size of 30 mm in diameter and 1 mm in depth.

Description

Technical Field

[0001] The present invention relates to a thin film polymer stacked capacitor and a method for manufacturing the same. Background Art

[0002] As a capacitor, a capacitor having a structure in which dielectric layers made of resin and electrode layers made of metal are alternately stacked is known.

[0003] Patent Document 1 describes a thin-film polymer laminate capacitor and a method for manufacturing the same. This document describes a method for manufacturing a thin-film polymer laminate capacitor, which includes repeatedly performing the following steps: vapor-depositing a monomer in a vacuum chamber to form a monomer layer, then irradiating the monomer layer with an electron beam to cure it to form a resin thin film layer; and vapor-depositing a metal material to form a metal thin film layer, to produce a laminated body in which resin thin film layers and metal thin film layers are alternately laminated on a rotating drum.

[0004] Patent Document 2 discloses a capacitor including two electrodes separated by a dielectric member, and describes that the dielectric member includes a multifunctional acrylate polymer having a specific chemical structure.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: International Publication No. 2015 / 118693

[0008] Patent Document 2: Japanese Patent Application Laid-Open No. 60-157106 Summary of the Invention

[0009] Problems to be solved by the invention

[0010] Conventional thin-film polymer multilayer capacitors sometimes lack sufficient durability. In particular, conventional thin-film polymer multilayer capacitors formed using multifunctional monomers sometimes lack sufficient durability. Furthermore, conventional capacitors have struggled to provide both good electrical properties and sufficient durability.

[0011] An object of the present invention is to provide a thin film polymer stack capacitor having electrical properties required as a thin film polymer stack capacitor and having improved durability.

[0012] Solutions for solving problems

[0013] The above-mentioned problems can be solved by the following aspects of the present invention.

[0014] <Aspect 1>

[0015] A thin film polymer laminated capacitor having a structure in which resin film layers and internal electrode metal layers are alternately laminated.

[0016] The resin film layer has a polymer structure formed by polymerizing a first monomer that is a multifunctional monomer and a second monomer that is a monofunctional monomer.

[0017] The first monomer and the second monomer satisfy at least one of the following conditions (a) and (b):

[0018] (a) the HLB value H2 of the second monomer is less than the HLB value H1 of the first monomer;

[0019] (b) a first polymer component formed using only the first monomer as a monomer and a second polymer component formed using only the second monomer as a monomer are produced according to the following production method (1), and when the water absorption of each polymer component is measured after being left to stand for 40 hours under conditions of 40° C. and 95% relative humidity, the water absorption of the second polymer component is smaller than the water absorption of the first polymer component;

[0020] The manufacturing method (1) comprises the following steps:

[0021] providing the first monomer or the second monomer as a test monomer;

[0022] mixing a photoinitiator in a ratio of 0.2±0.01 mol relative to 100 mol of the test monomer to obtain a mixture;

[0023] injecting the mixture into a disk; and

[0024] The mixture injected into the disk was irradiated with UV light at 120 W and a distance of 250 mm in a nitrogen atmosphere until polymerization stopped, thereby producing a disk-shaped polymer member having dimensions of 30 mm in diameter and 1 mm in depth.

[0025] <Aspect 2>

[0026] The capacitor according to aspect 1, wherein a difference (H1-H2) between an HLB value H1 of the first cell and an HLB value H2 of the second cell is 0.1 or greater.

[0027] <Aspect 3>

[0028] The capacitor according to aspect 2, wherein the difference (H1-H2) is greater than or equal to 0.5.

[0029] <Aspect 4>

[0030] The capacitor according to any one of aspects 1 to 3, wherein the HLB value H1 of the first cell is in the range of 3.0 to 5.0,

[0031] The HLB value H2 of the second monomer is in the range of 2.0 to 4.0.

[0032] <Aspect 5>

[0033] The capacitor according to any one of aspects 1 to 4, wherein a molar ratio of the first monomer to the second monomer is 10:90 to 90:10.

[0034] <Aspect 6>

[0035] The capacitor according to any one of aspects 1 to 5, wherein at least one of the first monomer and the second monomer has an acrylate group or a methacrylate group, or at least one of the first monomer and the second monomer includes a monomer having an acrylate group or a methacrylate group.

[0036] <Aspect 7>

[0037] The capacitor according to aspect 6, wherein

[0038] The first monomer and the second monomer both have an acrylate group or a methacrylate group, or the first monomer and the second monomer both include a monomer having an acrylate group or a methacrylate group.

[0039] <Aspect 8>

[0040] The capacitor according to any one of aspects 1 to 7, wherein the first monomer is a bifunctional monomer.

[0041] <Aspect 9>

[0042] The capacitor according to any one of aspects 1 to 8, wherein the first monomer is tricyclodecane dimethanol diacrylate or tricyclodecane dimethanol dimethacrylate, or the first monomer comprises tricyclodecane dimethanol diacrylate or tricyclodecane dimethanol dimethacrylate,

[0043] and / or

[0044] The second monomer is 2-(biphenyl-2-yloxy)-ethyl acrylate or 4-phenylbenzyl acrylate, or the second monomer includes 2-(biphenyl-2-yloxy)-ethyl acrylate or 4-phenylbenzyl acrylate.

[0045] <Aspect 10>

[0046] The capacitor according to any one of aspects 1 to 9, wherein the third polymer component manufactured according to the manufacturing method (2) below has a water absorption rate of 0.8% or less when left to stand for 40 hours under conditions of 40° C. and 95% relative humidity,

[0047] Wherein, the manufacturing method (2) comprises the following steps:

[0048] providing the first monomer and the second monomer;

[0049] mixing the first monomer and the second monomer in the same molar ratio as in the resin film layer to obtain a monomer mixture;

[0050] mixing a photoinitiator in a ratio of 0.2±0.01 mol relative to 100 mol of the monomer mixture to obtain a mixture;

[0051] injecting the mixture into a disk; and

[0052] The mixture injected into the disk was irradiated with UV light at 120 W and a distance of 250 mm in a nitrogen atmosphere until polymerization stopped, thereby producing a disk-shaped polymer member having dimensions of 30 mm in diameter and 1 mm in depth.

[0053] <Aspect 11>

[0054] The capacitor according to any one of aspects 1 to 10, wherein the capacitor has a relative dielectric constant of 2.0 or greater when measured at 25° C. and 1 kHz, and a tan δ of less than 1.0% when measured at 25° C. and 1 kHz.

[0055] <Aspect 12>

[0056] A method for manufacturing a thin film polymer laminate capacitor having a structure in which resin film layers and internal electrode metal layers are alternately laminated.

[0057] The method includes the steps of curing a monomer layer comprising a first monomer which is a multifunctional monomer and a second monomer which is a monofunctional monomer to form the resin film layer.

[0058] The first monomer and the second monomer satisfy at least one of the following conditions (a) and (b):

[0059] (a) the HLB value H2 of the second monomer is less than the HLB value H1 of the first monomer;

[0060] (b) a first polymer component formed using only the first monomer as a monomer and a second polymer component formed using only the second monomer as a monomer are produced according to the following production method (1), and when the water absorption of each polymer component is measured after being left to stand for 40 hours under conditions of 40° C. and 95% relative humidity, the water absorption of the second polymer component is smaller than the water absorption of the first polymer component;

[0061] The manufacturing method (1) comprises the following steps:

[0062] providing the first monomer or the second monomer as a test monomer;

[0063] mixing a photoinitiator in a ratio of 0.2±0.01 mol relative to 100 mol of the test monomer to obtain a mixture;

[0064] injecting the mixture into a disk; and

[0065] The mixture injected into the disk was irradiated with UV light at 120 W and a distance of 250 mm in a nitrogen atmosphere until polymerization stopped, thereby producing a disk-shaped polymer member having dimensions of 30 mm in diameter and 1 mm in depth.

[0066] Effects of the Invention

[0067] According to the present invention, it is possible to provide a thin film polymer stack capacitor having electrical properties required as a thin film polymer stack capacitor and having improved durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] Figure 1 Schematic diagram of a three-dimensional thin film polymer stacked capacitor 1.

[0069] Figure 2 Graph showing the measurement results of the water absorption rates of the capacitors according to Example 1 and Comparative Example 1. DETAILED DESCRIPTION

[0070] Thin Film Polymer Multilayer Capacitors

[0071] The thin film polymer laminated capacitor disclosed herein has a structure in which resin film layers and internal electrode metal layers are alternately laminated.

[0072] The resin film layer has a polymer structure formed by polymerizing a first monomer which is a multifunctional monomer and a second monomer which is a monofunctional monomer.

[0073] The first monomer and the second monomer satisfy at least one of the following conditions (a) and (b):

[0074] (a) the HLB value H2 of the second monomer is less than the HLB value H1 of the first monomer;

[0075] (b) a first polymer component formed using only a first monomer as a monomer and a second polymer component formed using only a second monomer as a monomer are produced according to the following production method (1), and when the water absorption of each polymer component is measured after being allowed to stand for 40 hours under conditions of 40° C. and 95% relative humidity, the water absorption of the second polymer component is smaller than the water absorption of the first polymer component;

[0076] The manufacturing method (1) comprises the following steps:

[0077] providing a first monomer or a second monomer as a test monomer;

[0078] mixing a photoinitiator in a ratio of 0.2±0.01 mol relative to 100 mol of the test monomer to obtain a mixture;

[0079] injecting the mixture into the disk; and

[0080] The mixture injected into the disk was irradiated with UV light at 120 W and a distance of 250 mm in a nitrogen atmosphere until polymerization stopped, thereby producing a disk-shaped polymer member having dimensions of 30 mm in diameter and 1 mm in depth.

[0081] Conventional capacitors sometimes lacked good durability. In particular, conventional capacitors using polymers formed from multifunctional monomers often lacked the ability to achieve high-molecular-weight structures with highly cross-linked resin film layers.

[0082] In contrast, according to the present invention, a thin film polymer multilayer capacitor having the performance required as a thin film polymer multilayer capacitor and having improved durability can be provided.

[0083] More specifically, in the capacitor of the present invention that satisfies the above condition (a), the resin film layer is formed using not only a polyfunctional monomer but also a monofunctional monomer with a relatively low HLB value. While not wishing to be bound by theory, it is believed that in this case, the polyfunctional monomer ensures a sufficient degree of crosslinking of the polymer structure in the resin film layer, while the polymer structural units derived from the monofunctional monomer with a relatively low HLB value reduce the water absorption of the resin film layer, resulting in excellent durability.

[0084] Furthermore, in the capacitor of the present invention that satisfies the above condition (b), the resin film layer is formed not only from a polyfunctional monomer but also from a monofunctional monomer that forms a polymer with low water absorption. While not wishing to be bound by theory, it is believed that in this case, the polyfunctional monomer ensures a sufficient degree of crosslinking of the polymer structure in the resin film layer, while the polymer structural units derived from the monofunctional monomer reduce the water absorption of the resin film layer, resulting in excellent durability.

[0085] Furthermore, while not wishing to be bound by theory, it is believed that the inclusion of a monofunctional monomer suppresses cure shrinkage of the resin film layer and the generation of internal stress compared to using only a multifunctional monomer, thereby reducing warping and cracking, and preventing or suppressing delamination within the capacitor. In this case, since moisture intrusion into cracked or delaminated areas is suppressed, it is believed that the water absorption rate of the capacitor can also be more effectively suppressed.

[0086] The methods involved in the present disclosure will be described in more detail below.

[0087] <First monomer and second monomer>

[0088] The resin film layer has a polymer structure formed by polymerizing a first monomer, which is a polyfunctional monomer, and a second monomer, which is a monofunctional monomer. The molar ratio of monomer units derived from the first monomer and monomer units derived from the second monomer in all monomer units constituting the polymer structure of the resin film layer is preferably 80% or more, 85% or more, 90% or more, or 95% or more, and particularly preferably 100%.

[0089] A polyfunctional monomer has a plurality (particularly two) of polymerizable functional groups in one molecule, while a monofunctional monomer has one polymerizable functional group in one molecule.

[0090] Examples of polymerizable functional groups include vinyl groups (particularly acryloyl groups, methacryloyl groups, acrylate groups, and methacrylate groups), acrylonitrile groups, and epoxy groups. Preferably, the multifunctional monomer and / or monofunctional monomer has at least one of an acrylate group and a methacrylate group. Most preferably, both the multifunctional monomer and the monofunctional monomer have an acrylate group. It should be noted that a monomer having an acrylate group is an acrylate monomer, and a monomer having a methacrylate group is a methacrylate monomer.

[0091] The polyfunctional monomers and monofunctional monomers can be polymerized to form polymers through the polymerizable functional groups under conditions such as electron beam irradiation.

[0092] The ratio of the first monomer to the second monomer, that is, the ratio of the polyfunctional monomer to the monofunctional monomer, can be appropriately set according to the desired characteristics of the capacitor and the like.

[0093] The molar ratio of the first monomer to the second monomer is preferably 10:90 to 90:10, more preferably 20:80 to 80:20, 30:70 to 70:30, 40:60 to 60:40, or 45:55 to 55:45.

[0094] In other words, the molar amount of the second monomer is preferably 10 to 90%, 20 to 80%, 30 to 70%, 40 to 60%, or 45 to 55% relative to the total molar amount of the first monomer and the second monomer.

[0095] When the ratio of the first monomer to the second monomer is within the above range, a capacitor having good electrical characteristics and particularly excellent durability can be provided.

[0096] (Multifunctional monomer)

[0097] The multifunctional monomer is particularly a bifunctional monomer. The multifunctional monomer preferably has an acrylate group or a methacrylate group. The multifunctional monomer most preferably has an acrylate group. In another embodiment, the multifunctional monomer preferably comprises a monomer having an acrylate group or a methacrylate group, or consists of a monomer having an acrylate group or a methacrylate group. The multifunctional monomer most preferably comprises a monomer having an acrylate group, or consists of a monomer having an acrylate group.

[0098] In one embodiment of the present disclosure, the multifunctional monomer may have a chemical structure represented by the following general formula (1).

[0099]

[0100] In formula (1),

[0101] R 1 is a group containing 1 to 20 carbon atoms;

[0102] R 2 is H or CH3;

[0103] n is 2 to 4.

[0104] In formula (1), n ​​is preferably 2 to 3, and more preferably n=2.

[0105] In formula (1), R 1 It preferably contains 3 to 20, more preferably 6 to 20, and even more preferably 8 to 20 carbon atoms.

[0106] R in formula (1) 1 may contain oxygen atoms. In this case, R 1It may contain 1 to 20, 1 to 10, 1 to 5, 1 to 3, or 1 to 2 oxygen atoms, or may contain 1 oxygen atom.

[0107] R in formula (1) 1 In particular, ether bonds may be present. In this case, R 1 It may contain 1 to 20, 1 to 10, 1 to 5, 1 to 3, or 1 to 2 ether bonds, or may contain 1 ether bond.

[0108] Preferably, R in formula (1) 1 It is composed of carbon atoms, hydrogen atoms and optionally oxygen atoms.

[0109] In formula (1), R 1 It may contain aliphatic (straight-chain or branched) moieties, alicyclic moieties and / or aromatic moieties.

[0110] When R in formula (1) 1 The inclusion of an alicyclic moiety increases the molecular steric hindrance and, consequently, the molar volume, which can reduce the capacitor's tanδ. Furthermore, the steric hindrance and rigidity suppress the micro-Brownian motion of the main chain segments within the polymer's three-dimensional network structure due to temperature increases, resulting in capacitors with a high glass transition temperature and excellent heat resistance. Furthermore, since the cure shrinkage of the resin film layer is relatively suppressed, the interlayer adhesion of the capacitor can be further improved.

[0111] When R in formula (1) 1 When an aromatic moiety is included, the polarization caused by the dipole orientation is larger than that of a simple alkyl skeleton due to the π electron conjugated system, and a larger dielectric constant can be obtained. 1 When a large steric structure such as a biphenyl structure is included, it can reduce the capacitor's tanδ as described above for the alicyclic portion. Furthermore, since the cure shrinkage of the resin film layer is relatively suppressed, the interlayer adhesion of the capacitor can be further improved.

[0112] In formula (1), R 1 It is preferable that no unsaturated bond is contained. By not containing an unsaturated bond, an increase in tan δ of the capacitor can sometimes be suppressed.

[0113] Examples of the compound structures of the polyfunctional monomers that can be used in the present invention, M1 to M6, are shown below.

[0114]

[0115] In the chemical formulas M3 and M4, n may be 1 to 20, preferably 5 to 18, more preferably 8 to 15, and even more preferably 9 to 12.

[0116] In the chemical formulas M5 and M6, n may be 1 to 20, preferably 1 to 10, more preferably 2 to 6, and even more preferably 3 to 4.

[0117] Examples of preferred compound structures of the polyfunctional monomer are shown below.

[0118]

[0119] Particularly preferred polyfunctional monomers include

[0120] Tricyclodecane dimethanol diacrylate,

[0121] Tricyclodecane dimethanol dimethacrylate,

[0122] 1,12-Dodecanediol dimethacrylate,

[0123] 1,12-Dodecanediol diacrylate,

[0124] α,α'-[Propane-2,2-diylbis-(4,1-phenylene)]bis[ω-(acryloyloxy)poly(ethylene oxide)].

[0125] (monofunctional monomer)

[0126] The monofunctional monomer preferably has an acrylate group or a methacrylate group. The monofunctional monomer most preferably has an acrylate group. In another embodiment, the monofunctional monomer preferably comprises or consists of a monomer having an acrylate group or a methacrylate group. The monofunctional monomer most preferably comprises or consists of a monomer having an acrylate group.

[0127] In one embodiment of the present disclosure, the monofunctional monomer may have a chemical structure represented by the following general formula (2).

[0128]

[0129] In formula (2),

[0130] R 3 is a group containing 1 to 20 carbon atoms;

[0131] R 2 is H or CH3.

[0132] R in formula (2) 2 Preferably H.

[0133] R in formula (2) 3 It preferably contains 3 to 20, more preferably 6 to 20, and even more preferably 8 to 20 carbon atoms.

[0134] R in formula (2) 3 may contain oxygen atoms. In this case, R 3 It may contain 1 to 20, 1 to 10, 1 to 5, 1 to 3, 1 to 2, or 1 oxygen atom.

[0135] R in formula (2) 3 In particular, ether bonds may be present. In this case, R 3 It may contain 1 to 20, 1 to 10, 1 to 5, 1 to 3, 1 to 2, or 1 ether bond.

[0136] Preferably, R in formula (2) 3 It is composed of carbon atoms, hydrogen atoms and optionally oxygen atoms.

[0137] In formula (2), R 3 It may contain aliphatic (straight-chain or branched) moieties, alicyclic moieties and / or aromatic moieties.

[0138] When R in formula (2) 3 The inclusion of an alicyclic moiety increases the molecular steric hindrance and, consequently, the molar volume, which can reduce the capacitor's tanδ. Furthermore, the steric hindrance and rigidity suppress the micro-Brownian motion of the main chain segments within the polymer's three-dimensional network structure due to temperature increases, resulting in capacitors with a high glass transition temperature and excellent heat resistance. Furthermore, since the cure shrinkage of the resin film layer is relatively suppressed, the interlayer adhesion of the capacitor can be further improved.

[0139] When R in formula (2) 3 When an aromatic moiety is included, the polarization caused by the dipole orientation is larger than that of a simple alkyl skeleton due to the π electron conjugated system, and a larger dielectric constant can be obtained. 3 When a large steric structure such as a biphenyl structure is included, it can reduce the capacitor's tanδ as described above for the alicyclic portion. Furthermore, since the cure shrinkage of the resin film layer is relatively suppressed, the interlayer adhesion of the capacitor can be further improved.

[0140] R 3 Particularly preferably, it has a biphenyl structure.

[0141] In formula (2), R 3 It is preferable that no unsaturated bond is contained. By not containing an unsaturated bond, an increase in tan δ of the capacitor can sometimes be suppressed.

[0142] Examples of the compound structures of the monofunctional monomers that can be used in the present invention are shown below: S1 to S8 and S'1 to S'4.

[0143]

[0144]

[0145] In the chemical formulae S1 and S2, and S'1 and S'2, n may be 0 to 20, preferably 1 to 10, more preferably 1 to 5, further preferably 1 to 3 or 1 to 2, and most preferably n=1.

[0146] In the chemical formulae S5 and S6, n may be 1 to 20, preferably 5 to 18, and more preferably 12 to 16, respectively.

[0147] In chemical formulae S7 and S8, n may be 1 to 20, preferably 10 to 20, more preferably 12 to 18, and even more preferably 14 to 16, respectively.

[0148] Examples of preferred compound structures of monofunctional monomers are shown below.

[0149]

[0150] Particularly preferred monofunctional monomers include:

[0151] 2-(Biphenyl-2-yloxy)-ethyl acrylate,

[0152] 4-phenylbenzyl acrylate,

[0153] 2-[(tricyclo[5.2.1.0(2,6)]dec-4-en-9-yl)oxy]ethyl acrylate,

[0154] 2-[(Tricyclo[5.2.1.0(2,6)]dec-4-en-9-yl)oxy]ethyl methacrylate.

[0155] Particularly preferred combinations of the first monomer and the second monomer include the following (1) and (2):

[0156] (1) a combination of tricyclodecane dimethanol diacrylate and 2-(biphenyl-2-yloxy)ethyl acrylate;

[0157] (2) Combination of tricyclodecane dimethanol diacrylate and 4-phenylbenzyl acrylate.

[0158] In one embodiment of the present invention, at least either one of the first monomer and the second monomer has an acrylate group or a methacrylate group (i.e., is an acrylate monomer or a methacrylate monomer), or at least either one of the first monomer and the second monomer contains a monomer having an acrylate group or a methacrylate group (i.e., an acrylate monomer or a methacrylate monomer).

[0159] In one embodiment of the present invention, the first monomer and the second monomer both have an acrylate group or a methacrylate group (i.e., are an acrylate monomer or a methacrylate monomer), or the first monomer and the second monomer both contain a monomer having an acrylate group or a methacrylate group (i.e., an acrylate monomer or a methacrylate monomer).

[0160] In one embodiment of the present invention, the first monomer is tricyclodecane dimethanol diacrylate or tricyclodecane dimethanol dimethacrylate, or the first monomer comprises tricyclodecane dimethanol diacrylate or tricyclodecane dimethanol dimethacrylate,

[0161] and / or

[0162] The second monomer is or comprises 2-(biphenyl-2-yloxy)-ethyl acrylate or 4-phenylbenzyl acrylate.

[0163] HLB value

[0164] In one embodiment of the present disclosure, the capacitor of the present invention satisfies the above condition (a), that is, the HLB value H2 of the second monomer, which is a monofunctional monomer, is smaller than the HLB value H1 of the first monomer, which is a polyfunctional monomer.

[0165] The HLB value is an indicator of affinity for water and oil and is calculated based on the types of functional groups in the monomer. The higher the HLB value, the more hydrophilic the monomer. The HLB value can be calculated using the Davis method.

[0166] The difference (H1-H2) between the HLB value H1 of the first monomer and the HLB value H2 of the second monomer is preferably 0.1 or greater. More preferably, the difference (H1-H2) is 0.2 or greater, 0.3 or greater, 0.4 or greater, or 0.5 or greater, and / or 3.0 or less, 2.5 or less, 2.0 or less, 1.9 or less, 1.8 or less, 1.7 or less, 1.6 or less, 1.5 or less, 1.4 or less, 1.3 or less, or 1.2 or less.

[0167] The HLB value H1 of the first monomer is preferably within the range of 3.0 to 5.0. More preferably, the range is 3.1 or greater, 3.2 or greater, 3.3 or greater, 3.4 or greater, 3.5 or greater, 3.6 or greater, 3.7 or greater, 3.8 or greater, 3.9 or greater, or 4.0 or greater, and / or 4.9 or less, 4.8 or less, 4.7 or less, 4.6 or less, 4.5 or less, 4.4 or less, or 4.3 or less.

[0168] The HLB value H2 of the second monomer is preferably within the range of 2.0 to 4.0. This range is more preferably 2.1 or greater, 2.2 or greater, 2.3 or greater, 2.4 or greater, 2.5 or greater, 2.6 or greater, 2.7 or greater, 2.8 or greater, 2.9 or greater, or 3.0 or greater, and / or 3.9 or less, 3.8 or less, 3.7 or less, 3.6 or less, 3.5 or less, 3.4 or less, 3.3 or less, or 3.2 or less.

[0169] The HLB value H1 of the first monomer and the HLB value H2 of the second monomer can be calculated based on the Davis method.

[0170] As examples, the HLB values ​​calculated based on the Davis method for some representative multifunctional monomers and monofunctional monomers are listed in Table 1 below.

[0171] [Table 1-1]

[0172] Table 1

[0173]

[0174] [Table 1-2]

[0175] (Table 1 continued)

[0176]

[0177] (Calculation method of HLB value based on Davis method)

[0178] The HLB value can be calculated according to the Davis method using the following formula (A): HLB value = 7 + Σ (number of hydrophilic groups) + Σ (number of lipophilic groups) (A) The number of main hydrophilic groups is as follows:

[0179] Ester group (-COO-) 2.4

[0180] Hydroxyl (-OH) 1.9

[0181] Ether group (-O-) 1.3

[0182] (-CH2CH2O-) 0.33

[0183] The base numbers of the main lipophilic groups are as follows:

[0184] Alkanes (-CH2-) -0.475

[0185] Methyl (-CH3) -0.475

[0186] Olefin (-CH=) -0.475

[0187] (-CH2CH(CH3)O-) -0.15

[0188] For example in the case of tricyclodecane dimethanol dimethacrylate:

[0189] According to the ester group 2

[0190] Alkane 12

[0191] Olefin 2×2

[0192] Methyl 2,

[0193] Based on the above base numbers, we can calculate:

[0194] HLB value = 3.25 (about 3.3).

[0195] It should be noted that the cyclic structure and the methylene groups directly bonded thereto in the molecular structure of tricyclodecane dimethanol dimethacrylate are both regarded as alkanes (the cyclic structure is composed of 10 alkanes in total).

[0196] In addition, for example, in the case of 2-(biphenyl-2-yloxy)-ethyl acrylate:

[0197] According to the ester group 1

[0198] Olefin 2+6×2

[0199] (-CH2CH2O-) 1,

[0200] Based on the above base numbers, we can calculate:

[0201] HLB value = 3.08 (about 3.1).

[0202] In addition, the two benzene rings in the molecular structure of 2-(biphenyl-2-yloxy)-ethyl acrylate are considered to be composed of six olefins respectively.

[0203] Water absorption rate

[0204] In another embodiment of the present disclosure, a capacitor according to the present invention satisfies the condition (b) above. Specifically, a first polymer component formed using only a first monomer as a monomer and a second polymer component formed using only a second monomer as a monomer are produced according to the production method (1), and when the water absorption of each polymer component is measured after standing for 40 hours under conditions of 40° C. and 95% relative humidity, the water absorption of the second polymer component is less than that of the first polymer component.

[0205] The difference between the water absorption rate (%) of the second polymer component and the water absorption rate (%) of the first polymer component may be 0.05 or greater. This difference is preferably 0.1 or greater, 0.2 or greater, or 0.3 or greater. The upper limit of this difference is not particularly limited, but may be, for example, 2.0 or less.

[0206] The water absorption rate of the first polymer component may be 0.5% to 2.0%, preferably 0.7% or more, 0.8% or more, 0.9% or more, and / or 1.8% or less, 1.6% or less, 1.4% or less, or 1.2% or less.

[0207] The water absorption rate of the second polymer component may be 0.1% to 1.0%. The water absorption rate of the first polymer component is preferably 0.2% or more, 0.3% or more, 0.4% or more, and / or 1.0% or less, 0.9% or less, 0.8% or less, or 0.7% or less.

[0208] The water absorption rates of the first and second polymer components can be calculated based on the weight change rates of the polymer components when subjected to a moisture absorption test in which the polymer components are left to stand at 40° C. and 95% relative humidity for 40 hours.

[0209] Specifically, the weight change (%) can be calculated based on the weight of the polymer component before and after the moisture absorption test, and this can be used as the water absorption rate. Specifically, the weight change (%) can be calculated using the following formula:

[0210] Weight change rate (%)=100×(weight after moisture absorption test−weight before moisture absorption test) / weight before moisture absorption test.

[0211] <Methods for producing first and second polymer components>

[0212] The first polymer member and the second polymer member for measuring water absorption are manufactured according to the manufacturing method (1).

[0213] The manufacturing method (1) comprises the following steps:

[0214] providing a first monomer or a second monomer as a test monomer;

[0215] mixing a photoinitiator in a ratio of 0.2±0.01 mol relative to 100 mol of the test monomer to obtain a mixture;

[0216] injecting the mixture into the disk; and

[0217] The mixture injected into the disk was irradiated with UV light at 120 W and a distance of 250 mm in a nitrogen atmosphere until polymerization stopped, thereby producing a disk-shaped polymer member having dimensions of 30 mm in diameter and 1 mm in depth.

[0218] Regarding the first monomer or the second monomer provided as a test monomer, reference can be made to the above description.

[0219] The photoinitiator can be appropriately selected according to the type of test monomer. Specific examples of the photoinitiator include 2-benzyl-2-dimethylamino-4'morpholinophenylbutanone. The test monomer and the photoinitiator can be mixed according to known methods.

[0220] The disc has dimensions such that, when the mixture placed therein is polymerized by UV irradiation, a disc-shaped polymer component having dimensions of 30 mm in diameter and 1 mm in depth can be produced. Specifically, for example, the disc may have a planar area with an inner diameter of 30 mm and a depth of 1 to 5 cm, and the mixture may be injected into the disc so that its height is 1 mm.

[0221] UV irradiation was performed to promote polymerization of the test monomers at an intensity of 120 W and a distance of 250 mm from the sample.

[0222] The irradiation time of UV irradiation is determined according to the type of test monomer, in particular, in order to fully carry out the polymerization of the test monomer (i.e., the curing of the mixture), and in a manner that no further polymerization is promoted even if UV irradiation is applied. Those skilled in the art can determine the irradiation time of UV irradiation according to the type of test monomer. For example, when the test monomer is an acrylate monomer (a monomer having an acrylate group), 60 seconds of UV irradiation can be performed. In addition, for example, when the test monomer is a methacrylate monomer (a monomer having a methacrylate group), 360 seconds of UV irradiation can be performed. When the test monomer has an acrylate group and a methacrylate group, 360 seconds of UV irradiation can be performed.

[0223] Thin-film polymer multilayer capacitors

[0224] The thin film polymer multilayer capacitor according to the present disclosure has a structure in which resin thin film layers and internal electrode metal layers are alternately stacked.

[0225] Figure 1 1 is a perspective view of a thin film polymer laminate capacitor 1. The thin film polymer laminate capacitor 1 comprises a laminate 2 in which resin thin film layers and metal thin film layers (internal electrode metal layers) are alternately laminated, and two external electrodes 3 and 4 are attached to the laminate 2.

[0226] The thin film polymer multilayer capacitor may have 10 to 10,000 layers, 50 to 5,000 layers, or 100 to 2,000 layers.

[0227] The resin thin film layer may have a thickness of 10 nm to 3000 nm, and preferably has a thickness of 100 to 1500 nm.

[0228] Examples of the metal material constituting the internal electrode metal layer include at least one selected from the group consisting of Al, Cu, Zn, Sn, Au, Ag, Pt, and combinations thereof.

[0229] The internal electrode metal layer may have a thickness of 1 nm to 100 nm, preferably 10 to 40 nm. Furthermore, the metal thin film layer preferably has a vapor deposition resistance of 1 to 50 Ω / □, 5 to 40 Ω / □, or 5 to 30 Ω / □.

[0230] (Relative dielectric constant)

[0231] The capacitors disclosed herein preferably have a relative dielectric constant of 2.0 or greater when measured at 25°C and 1 kHz. More preferably, the relative dielectric constant is 2.1 or greater, 2.2 or greater, 2.3 or greater, or 2.5 or greater. The upper limit of the relative dielectric constant is not particularly limited and may be 5.0 or less.

[0232] The relative dielectric constant at 25° C. and 1 kHz can be calculated based on the electrostatic capacitance measured using an LCR meter, the electrode area, and the thickness of the dielectric.

[0233] (tanδ)

[0234] Furthermore, the capacitors disclosed herein preferably have a tan δ (also known as dielectric loss tangent or loss coefficient) of less than 1.0% when measured at 25°C and 1 kHz. More preferably, the tan δ is 0.9% or less, 0.8% or less, 0.7% or less, 0.6% or less, 0.5% or less, 0.4% or less, 0.3% or less, 0.2% or less, or 0.1% or less. The lower limit of the tan δ is not particularly limited and may be 0.05% or greater.

[0235] Furthermore, the capacitors disclosed herein preferably have a tan δ of less than 0.01 when measured at 25°C and 1 kHz. More preferably, the tan δ is 0.009 or less, 0.008 or less, 0.007 or less, 0.006 or less, 0.005 or less, 0.004 or less, 0.003 or less, 0.002 or less, or 0.001 or less. The lower limit of the tan δ is not particularly limited and may be 0.0005 or greater.

[0236] Tanδ at 25°C and 1 kHz can be measured using an LCR meter.

[0237] (Water absorption rate of capacitor)

[0238] For capacitors, the third polymer member produced by the following production method (2) preferably has a water absorption of 0.8% or less when left to stand at 40° C. and 95% relative humidity for 40 hours.

[0239] The water absorption of the third polymer component is preferably 0.7% or less, 0.6% or less, 0.5% or less, or 0.4% or less. The lower limit of the water absorption of the third polymer component is not particularly limited, and may be, for example, 0.01% or more.

[0240] (Manufacturing method (2): Manufacturing method of the third polymer component)

[0241] The manufacturing method (2) for manufacturing the third polymer component comprises the following steps:

[0242] providing a first monomer and a second monomer;

[0243] mixing the first monomer and the second monomer in the same molar ratio as in the resin film layer to obtain a monomer mixture;

[0244] mixing a photoinitiator in a ratio of 0.2±0.01 mol relative to 100 mol of the monomer mixture to obtain a mixture;

[0245] injecting the mixture into the disk; and

[0246] The mixture injected into the disk was irradiated with UV light at 120 W and a distance of 250 mm in a nitrogen atmosphere until polymerization stopped, thereby producing a disk-shaped polymer member having dimensions of 30 mm in diameter and 1 mm in depth.

[0247] For details of the production method (2) for producing the third polymer component, reference can be made to the above description of the production method (1).

[0248] <Capacitor Manufacturing Method>

[0249] The method for producing the thin film polymer multilayer capacitor according to the present disclosure is not particularly limited.

[0250] For example, the thin film polymer stacked capacitor involved in the present disclosure can be manufactured by a method including the following steps: alternatingly repeating the steps of forming a resin thin film layer in a vacuum chamber and vapor-depositing a metal material to form a metal thin film layer on a rotating drum, thereby manufacturing a stacked body in which resin thin film layers and metal thin film layers are alternately stacked on a rotating drum.

[0251] As a method for alternately laminating the resin thin film layer and the metal thin film layer on a rotating drum, a known method can be used, and for example, the method described in International Publication No. 2015 / 118693 can be used.

[0252] The laminate formed on the rotating drum can be removed from the rotating drum and pressed under heat to flatten it. The flat laminate is then cut into rods, external electrodes are formed, and the resulting chips are further cut into chips to obtain thin film polymer laminate capacitors.

[0253] The thin film polymer multilayer capacitor according to the present disclosure is preferably manufactured according to the following manufacturing method according to the present disclosure.

[0254] (Method for manufacturing capacitor according to the present invention)

[0255] A method for manufacturing a thin film polymer laminate capacitor having a structure in which resin film layers and internal electrode metal layers are alternately laminated.

[0256] The method includes the steps of curing a monomer layer comprising a first monomer which is a multifunctional monomer and a second monomer which is a monofunctional monomer to form a resin film layer.

[0257] The first monomer and the second monomer satisfy at least one of the following conditions (a) and (b):

[0258] (a) the HLB value H2 of the second monomer is less than the HLB value H1 of the first monomer;

[0259] (b) a first polymer component formed using only a first monomer as a monomer and a second polymer component formed using only a second monomer as a monomer are produced according to the following production method (1), and when the water absorption of each polymer component is measured after being allowed to stand for 40 hours under conditions of 40° C. and 95% relative humidity, the water absorption of the second polymer component is smaller than the water absorption of the first polymer component;

[0260] The manufacturing method (1) comprises the following steps:

[0261] providing a first monomer or a second monomer as a test monomer;

[0262] mixing a photoinitiator in a ratio of 0.2±0.01 mol relative to 100 mol of the test monomer to obtain a mixture;

[0263] injecting the mixture into the disk; and

[0264] The mixture injected into the disk was irradiated with UV light at 120 W and a distance of 250 mm in a nitrogen atmosphere until polymerization stopped, thereby producing a disk-shaped polymer member having dimensions of 30 mm in diameter and 1 mm in depth.

[0265] For details of the manufacturing method of the present disclosure, reference may be made to the above description of the capacitor of the present disclosure. In particular, for manufacturing method (1), conditions (a) and conditions (b), reference may be made to the above description of the capacitor of the present disclosure.

[0266] The "curing treatment" during formation of the resin film layer can be performed according to known methods, such as the method described in International Publication No. 2015 / 118693. Specifically, the curing treatment can be performed by, for example, evaporating a monomer in a vacuum chamber to form a monomer layer, and then irradiating the monomer layer with an electron beam to cure the monomer layer.

[0267] Example

[0268] Hereinafter, the present invention will be described in more detail with reference to Examples. However, the present invention is not limited to the Examples.

[0269] Reference Examples 1-3

[0270] (Water absorption test)

[0271] In Reference Examples 1 to 3, the water absorption properties of the monomers shown in Table 2 below were evaluated using polymer blocks (polymer parts).

[0272] Reference Example 1

[0273] In Reference Example 1, tricyclodecane dimethanol diacrylate (manufactured by Shin-Nakamura Chemical Co., Ltd., product name: A-DCP) as a bifunctional monomer was used as a test monomer to produce a polymer part as follows:

[0274] Tricyclodecane dimethanol diacrylate was provided as a test monomer,

[0275] A photoinitiator (2-benzyl-2-dimethylamino-4'-morpholinophenylbutanone, manufactured by Tokyo Chemical Industry Co., Ltd.) was mixed at a ratio of 0.2±0.01 mol to 100 mol of the test monomer to form a mixture.

[0276] Pour the mixture into the disc and

[0277] The mixture injected into the disk was irradiated with UV light at 120 W and a distance of 250 mm in a nitrogen atmosphere until polymerization stopped, thereby producing a disk-shaped polymer member having dimensions of 30 mm in diameter and 1 mm in depth.

[0278] The test monomer in Reference Example 1 was an acrylate-containing monomer, so the mixture was irradiated with UV light for 60 seconds to allow polymerization (i.e., curing) to proceed sufficiently. Even if some defects occurred in the polymer, they were used directly for water absorption evaluation.

[0279] The resulting polymer parts were subjected to a hygroscopicity test. Specifically, the parts were placed in a constant temperature and humidity chamber set at 40°C and 95% relative humidity for 40 hours. The weight change before and after the hygroscopicity test was measured and used as the water absorption rate. The results are shown in Table 2 below.

[0280] Reference Example 2

[0281] In Reference Example 2, a water absorption test of the polymer component was conducted in the same manner as in Reference Example 1, except that 2-(biphenyl-2-yloxy)ethyl acrylate (manufactured by Shin-Nakamura Chemical Industry Co., Ltd., product name: A-LEN-10), a monofunctional monomer, was used as the test monomer instead of tricyclodecane dimethanol diacrylate. The results are shown in Table 2 below. Note that the test monomer in Reference Example 2 was a monomer having an acrylate group.

[0282] Reference Example 3

[0283] In Reference Example 3, a water absorption test of the polymer component was conducted in the same manner as in Reference Example 1, except that a mixture of tricyclodecane dimethanol diacrylate and 2-(biphenyl-2-yloxy)ethyl acrylate (molar ratio of 50:50) was used instead of tricyclodecane dimethanol diacrylate as the test monomer. The results are shown in Table 2 below.

[0284] [Table 2]

[0285] Table 2

[0286]

[0287] As shown in Table 2, the polymer component formed from 2-(biphenyl-2-yloxy)ethyl acrylate (Reference Example 2) exhibited lower water absorption than the polymer component formed from tricyclodecane dimethanol diacrylate (Reference Example 1).

[0288] Furthermore, as shown in Table 2, the polymer component formed from a mixture of tricyclodecane dimethanol diacrylate and 2-(biphenyl-2-yloxy)ethyl acrylate (Reference Example 3) exhibited lower water absorption than the polymer component formed from tricyclodecane dimethanol diacrylate alone (Reference Example 1).

[0289] These results indicate that by combining a polyfunctional monomer showing a higher water absorption when measured as a polymer part with a monofunctional monomer showing a lower water absorption when measured as a polymer part, the water absorption of the resulting polymer can be reduced.

[0290] Table 2 also shows the HLB values ​​calculated for each monomer using the Davis method. As shown in Table 2, the HLB value of 2-(biphenyl-2-yloxy)ethyl acrylate, a monofunctional monomer, is 3.1, while the HLB value of tricyclodecane dimethanol diacrylate, a bifunctional monomer, is 4.2. This means that 2-(biphenyl-2-yloxy)ethyl acrylate has a lower HLB value than tricyclodecane dimethanol diacrylate. The results in Table 2 demonstrate a correlation between the HLB values ​​of the monomers and the water absorption rate measured in polymer parts.

[0291] Example 1 and Comparative Example 1

[0292] In Example 1 and Comparative Example 1, capacitors having a resin film layer formed from the monomers or monomer mixtures shown in Table 3 below were produced and their durability was evaluated.

[0293] <Example 1>

[0294] (Manufacturing of Thin Film Polymer Multilayer Capacitors)

[0295] By alternately repeating the steps of forming a resin thin film layer in a vacuum chamber and forming a metal thin film layer on a rotating drum, a laminated body in which a total of 2550 resin thin film layers and metal thin film layers (internal electrode metal layers) are alternately stacked on the rotating drum is manufactured.

[0296] In the resin film layer formation step, the resin film layer is formed from a monomer mixture containing a bifunctional monomer, tricyclodecane dimethanol diacrylate (Shin-Nakamura Chemical Co., Ltd., product name: A-DCP), and a monofunctional monomer, 2-(biphenyl-2-yloxy)ethyl acrylate (Shin-Nakamura Chemical Co., Ltd., product name: A-LEN-10). This monomer mixture is vapor-deposited in a vacuum chamber to form a monomer layer, which is then irradiated with an electron beam to cure the monomer layer, thereby forming the resin film layer. Electron beam irradiation was performed at an accelerating voltage of 5.0 kV and an irradiation current of 50 mA. The thickness of the resin film layer is 0.5 μm.

[0297] In the metal thin film layer formation step, aluminum (Al) is vapor-deposited onto the resin thin film layer partially masked by vapor coating with fluorinated oil. The vapor-deposited metal thin film layer has a resistance of 10Ω / □.

[0298] The resulting laminate was removed from the rotating drum and pressed flattened under heating at 160°C. The flat laminate was then cut into rods, external electrodes (brass sprayed, copper plated, and tin plated) were attached, and the resulting chips were cut into chips to produce the thin-film polymer laminate capacitor of Example 1. The capacitors measured 4.5 mm x 3.2 mm.

[0299] (Wet environment resistance evaluation test)

[0300] The durability of the capacitor according to Example 1 was evaluated by a humidity test. In this test, the capacitor was placed in a constant temperature and humidity chamber at 60°C and 90% relative humidity and allowed to stand for 1000 hours while a DC voltage of 50 V was applied.

[0301] Before and after the humidity test, tanδ (dielectric loss tangent) and capacitance were measured. Tanδ was measured using an LCR meter at 25°C and 1 kHz. The capacitance (μF) of the capacitors was also measured using an LCR meter at 25°C and 1 kHz. The results are shown in Table 3 below.

[0302] (Evaluation of Water Absorption of Capacitors)

[0303] In Example 1, the water absorption of the capacitor was further evaluated according to the following water absorption test.

[0304] Specifically, the capacitor was placed in a constant temperature and humidity chamber at 40°C and 95% relative humidity, and the weight change rate of the capacitor after standing for a specified time was measured and used as the water absorption rate of the capacitor. The results are shown in Table 3 and Figure 2 shown.

[0305] In Table 3 below, the water absorption of the capacitors was evaluated according to the following criteria:

[0306] ○: The water absorption rate measured after 500 hours of the above water absorption test is less than 1%.

[0307] ×: The water absorption rate measured after 500 hours of the water absorption test was 1% or more.

[0308] <Comparative Example 1>

[0309] In Comparative Example 1, capacitors were manufactured and evaluated in the same manner as in Example 1, except that tricyclodecane dimethanol diacrylate (manufactured by Shin-Nakamura Chemical Co., Ltd., product name: A-DCP) was used as a bifunctional monomer instead of the monomer mixture. The results are shown in Tables 3 and 4. Figure 2 shown.

[0310] [Table 3]

[0311] Table 3

[0312]

[0313] As shown in Table 3, regarding initial characteristics, both the capacitors of Example 1 and Comparative Example 1 exhibited good initial capacitance characteristics (μF). Furthermore, the initial tan δ value of Example 1 was better than that of Comparative Example 1.

[0314] On the other hand, regarding the characteristics after the humidity environment evaluation test, the capacitor of Comparative Example 1, produced using only tricyclodecane dimethanol diacrylate as a bifunctional monomer, showed performance degradation, specifically, an increase in tan δ and a decrease in capacitance (ΔC < 0).

[0315] In contrast, the capacitor of Example 1 maintained a good tan δ even after the humidity resistance environment evaluation test, and no decrease in capacitance was observed (ΔC>0).

[0316] In addition, as shown in Table 3 and Figure 2 As shown, the capacitor according to Example 1 exhibits better water absorption (relatively reduced water absorption) than the capacitor according to Comparative Example 1.

[0317] The above results demonstrate that by combining a polyfunctional monomer and a monofunctional monomer having a specific HLB value, or by combining a polyfunctional monomer and a monofunctional monomer having a specific water absorption rate when measured using a polymer component, it is possible to provide a thin-film polymer multilayer capacitor having both good electrical properties and excellent durability. While not wishing to be bound by theory, it is believed that the use of a polyfunctional monomer in such a capacitor ensures a sufficient degree of crosslinking of the polymer structure in the resin film layer, while the use of a monofunctional monomer that results in a polymer with low water absorption reduces the water absorption of the capacitor, resulting in good electrical properties and excellent durability.

Claims

1. A thin film polymer laminate capacitor having a structure in which resin film layers and internal electrode metal layers are alternately laminated. The resin film layer has a polymer structure formed by polymerizing a first monomer that is a multifunctional monomer and a second monomer that is a monofunctional monomer. The first monomer and the second monomer satisfy at least one of the following conditions (a) and (b): (a) the HLB value H2 of the second monomer is less than the HLB value H1 of the first monomer, and the difference (H1-H2) between the HLB value H1 of the first monomer and the HLB value H2 of the second monomer is greater than 0.1; (b) a first polymer component formed using only the first monomer as a monomer and a second polymer component formed using only the second monomer as a monomer are produced according to the following production method (1), and when the water absorption of each polymer component is measured after being left to stand for 40 hours under conditions of 40° C. and 95% relative humidity, the water absorption of the second polymer component is smaller than the water absorption of the first polymer component, and the difference between the water absorption (%) of the second polymer component and the water absorption (%) of the first polymer component is 0.05 or more; in, The manufacturing method (1) comprises the following steps: providing the first monomer or the second monomer as a test monomer; mixing a photoinitiator in a ratio of 0.2±0.01 mol relative to 100 mol of the test monomer to obtain a mixture; injecting the mixture into a disk; as well as The mixture injected into the disk was irradiated with UV light at 120 W and a distance of 250 mm in a nitrogen atmosphere until polymerization stopped, thereby producing a disk-shaped polymer member having dimensions of 30 mm in diameter and 1 mm in depth.

2. The capacitor according to claim 1, wherein The difference (H1-H2) is 0.5 or more.

3. The capacitor according to claim 1, wherein The HLB value H1 of the first monomer is in the range of 3.0 to 5.0, The HLB value H2 of the second monomer is in the range of 2.0 to 4.

0.

4. The capacitor according to any one of claims 1 to 3, wherein The molar ratio of the first monomer to the second monomer is 10:90 to 90:

10.

5. The capacitor according to any one of claims 1 to 3, wherein At least one of the first monomer and the second monomer has an acrylate group or a methacrylate group, or at least one of the first monomer and the second monomer includes a monomer having an acrylate group or a methacrylate group. The capacitor according to claim 5 , wherein: The first monomer and the second monomer both have an acrylate group or a methacrylate group, or the first monomer and the second monomer both include a monomer having an acrylate group or a methacrylate group.

7. The capacitor according to any one of claims 1 to 3, wherein The first monomer is a bifunctional monomer.

8. The capacitor according to any one of claims 1 to 3, wherein The first monomer is tricyclodecane dimethanol diacrylate or tricyclodecane dimethanol dimethacrylate, or the first monomer includes tricyclodecane dimethanol diacrylate or tricyclodecane dimethanol dimethacrylate, and / or The second monomer is 2-(biphenyl-2-yloxy)-ethyl acrylate or 4-phenylbenzyl acrylate, or the second monomer includes 2-(biphenyl-2-yloxy)-ethyl acrylate or 4-phenylbenzyl acrylate.

9. The capacitor according to any one of claims 1 to 3, wherein The third polymer component manufactured by the manufacturing method (2) below has a water absorption rate of 0.8% or less when left to stand at 40° C. and 95% relative humidity for 40 hours. Wherein, the manufacturing method (2) comprises the following steps: providing the first monomer and the second monomer; mixing the first monomer and the second monomer in the same molar ratio as in the resin film layer to obtain a monomer mixture; mixing a photoinitiator in a ratio of 0.2±0.01 mol relative to 100 mol of the monomer mixture to obtain a mixture; injecting the mixture into a disk; and The mixture injected into the disk was irradiated with UV light at 120 W and a distance of 250 mm in a nitrogen atmosphere until polymerization stopped, thereby producing a disk-shaped polymer member having dimensions of 30 mm in diameter and 1 mm in depth.

10. The capacitor according to any one of claims 1 to 3, wherein The capacitor has a relative dielectric constant of 2.0 or greater when measured at 25° C. and 1 kHz, and a tan δ of less than 1.0% when measured at 25° C. and 1 kHz.

11. A method for manufacturing a thin film polymer laminate capacitor having a structure in which resin film layers and internal electrode metal layers are alternately laminated. The method includes the steps of curing a monomer layer comprising a first monomer which is a multifunctional monomer and a second monomer which is a monofunctional monomer to form the resin film layer. The first monomer and the second monomer satisfy at least one of the following conditions (a) and (b): (a) the HLB value H2 of the second monomer is less than the HLB value H1 of the first monomer, and the difference (H1-H2) between the HLB value H1 of the first monomer and the HLB value H2 of the second monomer is greater than 0.1; (b) a first polymer component formed using only the first monomer as a monomer and a second polymer component formed using only the second monomer as a monomer are produced according to the following production method (1), and when the water absorption of each polymer component is measured after being left to stand for 40 hours under conditions of 40° C. and 95% relative humidity, the water absorption of the second polymer component is smaller than the water absorption of the first polymer component, and the difference between the water absorption (%) of the second polymer component and the water absorption (%) of the first polymer component is 0.05 or more; in, The manufacturing method (1) comprises the following steps: providing the first monomer or the second monomer as a test monomer; mixing a photoinitiator in a ratio of 0.2±0.01 mol relative to 100 mol of the test monomer to obtain a mixture; injecting the mixture into a disk; as well as The mixture injected into the disk was irradiated with UV light at 120 W and a distance of 250 mm in a nitrogen atmosphere until polymerization stopped, thereby producing a disk-shaped polymer member having dimensions of 30 mm in diameter and 1 mm in depth.

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