CN1908063A - High-dielectric organic/inorganic hybrid material composition with flexibility and high heat resistance and its cured product - Google Patents
High-dielectric organic/inorganic hybrid material composition with flexibility and high heat resistance and its cured product Download PDFInfo
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Abstract
Description
技术领域technical field
本发明是关于一种高介电有机/无机混成材料组成物,其可用于制备一具有挠曲性、高耐热性的高介电黏结层(bonding layer)。The invention relates to a high dielectric organic/inorganic hybrid material composition, which can be used to prepare a high dielectric bonding layer with flexibility and high heat resistance.
背景技术Background technique
美国专利公开US2002/0048137A1案揭示了一种用于制作两层内嵌式电容(two-layered embedded capacitor)的一电容箔(capacitor foil),包括一导电层及形成于该导电层上具有高介电常数的部份硬化黏结层(bondinglayer),其中该黏结层是由添加有电容性陶瓷粉末(capacitive ceramicparticles)的环氧树脂所形成。将该电容箔的黏结层贴合于一具有式样化铜箔的基板,即可制备出一具有内嵌式电容的印刷电路板中间产品,其中该式样化铜箔为该电容的一接地面(ground plane),而该导电层为电源面(powerplane)。U.S. Patent Publication US2002/0048137A1 discloses a capacitor foil for making a two-layered embedded capacitor, which includes a conductive layer and a high dielectric material formed on the conductive layer. Partially hardened bonding layer of electrical constant, wherein the bonding layer is formed by epoxy resin added with capacitive ceramic particles. Bonding the adhesive layer of the capacitor foil to a substrate with a patterned copper foil can prepare a printed circuit board intermediate product with an embedded capacitor, wherein the patterned copper foil is a ground plane of the capacitor ( ground plane), and the conductive layer is the power plane (powerplane).
美国专利第6274224号揭示一种被动电气物品(passive electricalarticle),包括第一层基板,第二层基板及介于其间的含有一聚合物的电绝缘或导电性层。此专利的一具体实施例为内嵌式电容,其中使用一分散有陶瓷粉末的环氧树脂组成物作为中间层。该组成物所使用的环氧树脂可以为双酚-A环氧树脂与酚醛清漆环氧树脂(novolac epoxy)的混合(blend),陶瓷粉末可为钛酸钡(barium titanate)。该组成物的制备方式可将钛酸钡粉末,环氧树脂的一有机溶液及一分散剂一起混合而制备。该分散剂较佳的为阴离子型分散剂,例如聚酯与多胺(polyamine)的一共聚合物,可从ICI Americas,Wilmington,Del.,以一商品名“Hypermer PS3”购得。此专利的环氧树脂组成物仍然有进一步被改善的空间。US Patent No. 6274224 discloses a passive electrical article (passive electrical article), which includes a first substrate, a second substrate and an electrically insulating or conductive layer containing a polymer therebetween. One embodiment of this patent is an in-cell capacitor in which an epoxy resin composition dispersed with ceramic powder is used as an intermediate layer. The epoxy resin used in the composition may be a blend of bisphenol-A epoxy resin and novolac epoxy resin, and the ceramic powder may be barium titanate. The composition can be prepared by mixing barium titanate powder, an organic solution of epoxy resin and a dispersant. The dispersant is preferably an anionic dispersant, such as a copolymer of polyester and polyamine, commercially available from ICI Americas, Wilmington, Del. under the trade name "Hypermer PS3". The epoxy resin composition of this patent still has room for further improvement.
美国专利公开第2003/0006402 A1号揭示一种高介电聚合物复合材料及其制造方法。该高介电聚合物复合材料具有大于200的一介电常数,其包括一聚合物树脂及导电性材料,其中该导电性材料可为过渡金属粉体、过渡金属的合金的粉体、碳黑、碳纤维或石墨。然而此专利的高介电聚合物复合材料具有非常大的分散因子(Dissipation factor),特别是频率在1MHz以上,且对频率依存性过高,不具使用价值。并且此专利申请案未对该高介电聚合物复合材料的耐热性、黏结性及加工性加以说明。因此,仍然有进一步被改善的空间。U.S. Patent Publication No. 2003/0006402 A1 discloses a high dielectric polymer composite material and a manufacturing method thereof. The high-dielectric polymer composite material has a dielectric constant greater than 200, which includes a polymer resin and a conductive material, wherein the conductive material can be transition metal powder, transition metal alloy powder, carbon black , carbon fiber or graphite. However, the high-dielectric polymer composite material of this patent has a very large dispersion factor (Dissipation factor), especially when the frequency is above 1MHz, and its dependence on frequency is too high, so it has no use value. And this patent application does not describe the heat resistance, adhesiveness and processability of the high dielectric polymer composite material. Therefore, there is still room for further improvement.
发明内容Contents of the invention
本发明的重点在强调高分子树脂与陶瓷粉体的混成材料配方技术,使该材料同时拥有高介电性、高耐热性、良好黏结性以及优良加工性(挠曲性)等。The focus of the present invention is to emphasize the compound material formulation technology of polymer resin and ceramic powder, so that the material has high dielectric properties, high heat resistance, good adhesion and excellent processability (flexibility), etc. at the same time.
本发明将揭露前案所未提及但却相当重要的材料配方技术,以解决环氧树脂/高介电陶瓷粉体/导电性材料的混成物可能发生的问题,包括改善耐热性问题、脆性问题、与铜箔间的黏结性问题、大的分散因子以及与传统(现有)PCB制程加工兼容性等。采用的手段包括:1)选择适当的环氧树脂组成,来同时平衡耐热性与黏结性;2)环氧树脂中填充一高介电性陶瓷粉体,来提高混成物的介电常数,并且粒径分布至少两种或两种以上,且其中必含一种纳米粉体,期能在具高介电特性下,加工时又能具有良好的流胶性以确保基板材料的质量;3)环氧树脂与部份导电粉体(表面具官能基的碳黑)反应,形成部分环氧树脂包覆碳黑以降低分散因子(Dissipation factor);4)选择适当的高分子型分散剂,一方面可改善低分子型分散性的低耐热性,特别是基板的耐焊锡性,一方面也可大幅提升未来产品应用的可靠性,其原理主要是由特殊高分子型分散剂,可轻易地附着于无机粉体表面,有与有机树脂间具有优良兼容性甚至些许反应性,可有效解决低分子型分散剂的缺点;5)添加适当的柔软剂来解决陶瓷粉体过多(为了有效提高介电常数)所造成基板过脆无法加工的缺点;及6)适时加入其它添加剂以改善黏度问题或进一步提升黏结性。所得到的高介电混成物可由传统玻纤布含浸方式、精密涂布技术或是网板/钢板印刷技术而制得具有高玻璃转移温度(Tg>180℃),与铜箔间具优良黏结性(>4lb/in)的黏结层(bonding layer)。本发明制成的内嵌式电容在1MHz频率下具有介电常数30~150,及分散因子(Dissipation factor)介于0.02~0.07。The present invention will disclose the important material formulation technology that has not been mentioned before, to solve the problems that may occur in the mixture of epoxy resin/high dielectric ceramic powder/conductive material, including improving heat resistance, Brittleness, adhesion to copper foil, large dispersion factor, and compatibility with traditional (existing) PCB manufacturing processes, etc. The methods used include: 1) choosing the appropriate composition of epoxy resin to balance the heat resistance and adhesion at the same time; 2) filling the epoxy resin with a high dielectric ceramic powder to increase the dielectric constant of the mixture, And there are at least two or more particle size distributions, and one kind of nanopowder must be contained in it, which is expected to have good flowability during processing under high dielectric properties to ensure the quality of the substrate material; 3 ) Epoxy resin reacts with part of the conductive powder (carbon black with functional groups on the surface) to form a part of epoxy resin coated carbon black to reduce the dispersion factor (Dissipation factor); 4) Select an appropriate polymer dispersant, On the one hand, it can improve the low heat resistance of low-molecular-weight dispersion, especially the solder resistance of the substrate. On the other hand, it can also greatly improve the reliability of future product applications. It adheres to the surface of inorganic powder, has excellent compatibility with organic resin and even has a little reactivity, which can effectively solve the shortcomings of low molecular dispersants; 5) Add appropriate softener to solve the problem of excessive ceramic powder (in order to effectively Increase the dielectric constant) the disadvantage that the substrate is too brittle and cannot be processed; and 6) Add other additives in time to improve the viscosity problem or further enhance the adhesion. The obtained high dielectric compound can be prepared by traditional glass fiber cloth impregnation method, precision coating technology or screen/stencil printing technology. It has a high glass transition temperature (Tg > 180 ℃), and has excellent adhesion to copper foil. (>4lb/in) adhesive layer (bonding layer). The built-in capacitor manufactured by the present invention has a dielectric constant of 30-150 at a frequency of 1 MHz, and a dispersion factor of 0.02-0.07.
依本发明内容所完成的一种有机/无机混成材料组成物,包含:An organic/inorganic hybrid material composition completed according to the content of the present invention, comprising:
a)一高Tg的环氧树脂系统,其包含一具下列结构的环氧树脂:a) A high Tg epoxy resin system comprising an epoxy resin with the following structure:
其中n为0~10; where n is 0-10;
b)一强介电性陶瓷粉体,含两种或两种以上的粒径分布范围,其中的一第一个粒径分布范围为1~100纳米,及一第二个粒径分布范围为300纳米~5微米;及b) A ferroelectric ceramic powder containing two or more particle size distribution ranges, wherein a first particle size distribution range is 1 to 100 nm, and a second particle size distribution range is 300 nanometers to 5 microns; and
c)一导电性粉体。c) a conductive powder.
较佳的,该导电性粉体包含过渡金属粉体、过渡金属的合金的粉体、碳黑、或碳纤维,其中该导电性粉体占该组成物的总固体成分的0.01~20重量%。更佳的,该导电性粉体为碳黑。最佳的,该碳黑包含一导电性碳黑及一表面具有羧基或羟基的碳黑。Preferably, the conductive powder comprises transition metal powder, transition metal alloy powder, carbon black, or carbon fiber, wherein the conductive powder accounts for 0.01-20% by weight of the total solid content of the composition. More preferably, the conductive powder is carbon black. Optimally, the carbon black includes a conductive carbon black and a carbon black with carboxyl or hydroxyl groups on the surface.
较佳的,该强介电性陶瓷粉体含两种主要的粒径分布范围,其中的第一个粒径分布范围为50~100纳米,及第二个粒径分布范围为0.3~5微米,且该第一个粒径分布范围的强介电性陶瓷粉体占全部强介电性陶瓷粉体的1~40重量%。Preferably, the ferroelectric ceramic powder contains two main particle size distribution ranges, wherein the first particle size distribution range is 50-100 nanometers, and the second particle size distribution range is 0.3-5 microns , and the ferroelectric ceramic powder in the first particle size distribution range accounts for 1-40% by weight of all the ferroelectric ceramic powder.
较佳的,该强介电性陶瓷粉体占该组成物的总固体成分的50~95重量%。Preferably, the ferroelectric ceramic powder accounts for 50-95% by weight of the total solid content of the composition.
较佳的,该强介电性陶瓷粉体为BaTiO3,SrTiO3,Ba(Sr)TiO3,或它们的植入金属离子者。Preferably, the ferroelectric ceramic powder is BaTiO 3 , SrTiO 3 , Ba(Sr)TiO 3 , or their implanted metal ions.
较佳的,该环氧树脂系统进一步包含选自下列族群的一或多种环氧树脂,该族群由双酚-A环氧树脂,环脂肪族环氧树脂,含萘环环氧树脂,双苯基环氧树脂,及酚醛清漆(Novolac)环氧树脂所组成。Preferably, the epoxy resin system further comprises one or more epoxy resins selected from the group consisting of bisphenol-A epoxy resins, cycloaliphatic epoxy resins, naphthalene ring-containing epoxy resins, bisphenol-A epoxy resins, Composed of phenyl epoxy resin and novolac (Novolac) epoxy resin.
较佳的,该环氧树脂系统进一步包含一种高分子分散剂。更佳的,该高分子分散剂为聚酯,聚酰胺,或是它们的共聚物,且该高分子分散剂占该组成物总固体成分的0.1~5.0重量%。Preferably, the epoxy resin system further comprises a polymer dispersant. More preferably, the polymer dispersant is polyester, polyamide, or their copolymers, and the polymer dispersant accounts for 0.1-5.0% by weight of the total solid content of the composition.
较佳的,该环氧树脂系统进一步包含一种高分子柔软剂。更佳的,该高分子柔软剂为聚酯类(polyester)、聚酰胺(polyamide)、聚酰胺-酰亚胺(polyamide-imide)、聚乙烯缩丁醛(polyvinyl butyral)、合成橡胶、聚己酸内酯(polycaprolactone),或脂肪链型环氧树脂,且该高分子柔软剂占该组成物总固体成分的0.5~20重量%。Preferably, the epoxy resin system further includes a polymer softener. More preferably, the polymer softener is polyester, polyamide, polyamide-imide, polyvinyl butyral, synthetic rubber, polyethylene Polycaprolactone, or aliphatic chain epoxy resin, and the polymer softener accounts for 0.5-20% by weight of the total solid content of the composition.
较佳的,该环氧树脂系统进一步包含一种稀释剂(diluent)或增黏结剂(adhesion promoter)。更佳的,该稀释剂或增黏结剂为以下所示Preferably, the epoxy resin system further comprises a diluent or an adhesion promoter. Preferably, the diluent or bonding agent is as follows
较佳的,中该环氧树脂系统进一步包含一种硬化剂,其可为多胺(polyamine),苯酚树脂(phenol resin)或是酸酐(acid anhydride)。该硬化剂的用量约为与该环氧树脂系统相同当量。Preferably, the epoxy resin system further includes a hardener, which can be polyamine, phenol resin or acid anhydride. The hardener is used in approximately the same equivalent amount as the epoxy resin system.
较佳的,该高环氧树脂系统进一步包含一硬化促进剂。较佳的,该硬化促进剂占该硬化剂的0.01~5重量%。Preferably, the high epoxy resin system further includes a hardening accelerator. Preferably, the hardening accelerator accounts for 0.01-5% by weight of the hardening agent.
较佳的,该环氧树脂系统进一步包含一种硅烷类偶合剂(Silane Couplingagent),以提高介电性陶瓷粉体在该组成物中的分散性与兼容性。更佳的,该硅烷类偶合剂为环氧硅烷(epoxysilane)或胺基硅烷(Aminosilane)。Preferably, the epoxy resin system further includes a silane coupling agent to improve the dispersion and compatibility of the dielectric ceramic powder in the composition. More preferably, the silane coupling agent is epoxysilane or aminosilane.
较佳的,该高环氧树脂系统进一步包含一催化剂。更佳的,该催化剂包含苯基膦化合物,及该催化剂占该组成物的总固体成分的0.01~5重量%。Preferably, the high epoxy resin system further comprises a catalyst. More preferably, the catalyst comprises a phenylphosphine compound, and the catalyst accounts for 0.01-5% by weight of the total solid content of the composition.
较佳的,该环氧树脂系统进一步包含一种有机溶剂。Preferably, the epoxy resin system further comprises an organic solvent.
本发明同时亦提供一种硬化的有机/无机混成材料,其是由本发明的组成物硬化而成。较佳的,该硬化是由加热该组成物而进行。更佳的,该加热是于160~200℃进行2~6小时。较佳的,在进行该硬化之前该含催化剂的高Tg的环氧树脂系统与该表面具有羧基或羟基的碳黑于100~130℃中反应3~6小时。The present invention also provides a hardened organic/inorganic hybrid material, which is hardened from the composition of the present invention. Preferably, the hardening is performed by heating the composition. More preferably, the heating is carried out at 160-200° C. for 2-6 hours. Preferably, the catalyst-containing high-Tg epoxy resin system reacts with the carbon black having carboxyl or hydroxyl groups on the surface at 100-130° C. for 3-6 hours before the hardening.
实施方式Implementation
本发明的要点即在制造高介电常数、低散失因子及高耐热性(高Tg)的基板材料,可应用于高频高速的通讯、信息或数字家电产品,包括内嵌式电容的制造。所使用的原料包括(a)高Tg的环氧树脂系统;(b)一强介电性陶瓷粉体,含两种或两种以上粒径分布,且其中必须含一种纳米粉体;(c)碳黑,其可含一种或一种以上不同类型的碳黑,包含导电性碳黑及具有-COOH或-OH官能基的碳黑;(d)至少一种高分子柔软剂;(e)高分子分散剂;(f)其它添加剂例如起始剂(initiator)、稀释剂(diluent),增黏结剂(adhesion promoter),催化剂和有机溶剂等。The gist of the present invention is to manufacture substrate materials with high dielectric constant, low dissipation factor and high heat resistance (high Tg), which can be applied to high-frequency and high-speed communication, information or digital home appliances, including the manufacture of embedded capacitors . The raw materials used include (a) a high Tg epoxy resin system; (b) a ferroelectric ceramic powder containing two or more particle size distributions, and must contain a nanopowder; ( c) carbon black, which may contain one or more different types of carbon black, including conductive carbon black and carbon black with -COOH or -OH functional groups; (d) at least one polymer softener; ( e) polymer dispersant; (f) other additives such as initiator (initiator), diluent (diluent), adhesion promoter (adhesion promoter), catalyst and organic solvent, etc.
制造的程序如下:The manufacturing procedure is as follows:
1.将环氧树脂与溶剂置于反应器中加热至90~95℃使之完全溶解。1. Put the epoxy resin and the solvent in the reactor and heat it to 90-95°C to dissolve it completely.
2.将溶解后的环氧树脂加入适量的碳黑,使用高速搅拌机高速搅拌分散碳黑,分散后加入催化剂升温到100~130℃,反应3~6小时。2. Add an appropriate amount of carbon black to the dissolved epoxy resin, and use a high-speed mixer to disperse the carbon black at high speed. After dispersion, add a catalyst and raise the temperature to 100-130°C, and react for 3-6 hours.
3.加入适量硬化剂及硬化促进剂,待充分溶解后,再加入适量的分散剂、柔软剂以及其它添加剂。3. Add appropriate amount of hardener and hardening accelerator, after fully dissolved, then add appropriate amount of dispersant, softener and other additives.
4.于上述溶液中添加适量不同大小粒径比例的高介电粉体,而后高速搅拌均匀。所添加的高介电粉体的含量大约占总固体成分的20~70体积%或50~95重量%,而大粒径(0.3~5μm)与小粒径(<100nm)比例为100∶1~60∶40。4. Add an appropriate amount of high-dielectric powders with different size and particle size ratios to the above solution, and then stir evenly at high speed. The content of the added high dielectric powder accounts for about 20-70% by volume or 50-95% by weight of the total solid content, and the ratio of large particle size (0.3-5μm) to small particle size (<100nm) is 100: 1~60:40.
5.将得到的有机无机混合物在以球磨机分散12~36小时,即可得到分散良好的混成物涂液。5. Disperse the obtained organic-inorganic mixture with a ball mill for 12-36 hours to obtain a well-dispersed mixture coating solution.
6.将上述的涂液制成基板以利电性的量测,制作方式有下列三种:6. Make the above-mentioned coating solution into a substrate to measure the electrical properties. There are three ways of making it:
(1)玻纤布含浸制程:先制得玻纤布与涂液预浸材料,再经由压合程序200℃约三小时,即可得到铜箔基板。(1) Glass fiber cloth impregnation process: first prepare the glass fiber cloth and coating liquid prepreg material, and then go through the pressing process at 200°C for about three hours to obtain the copper foil substrate.
(2)精密涂布制程:先制程背胶铜箔(RCC),再将其与铜箔压合成铜箔基板。(2) Precise coating process: first process adhesive-backed copper foil (RCC), and then press it with copper foil to form a copper foil substrate.
(3)由网版/钢版印刷制程于基板上印刷涂液,再压合金属层或高温熟化(curing)后再镀金属层,而形成具有上下电极的基板。(3) The coating solution is printed on the substrate by the screen/steel printing process, and then the metal layer is laminated or cured at high temperature, and then the metal layer is plated to form a substrate with upper and lower electrodes.
7.制得的基板经电性量测后,依材料组成份的不同所得到的介电常数值范围在1MHz频率下约为30~150,且分散因子约为0.02~0.07。7. After electrical measurement of the prepared substrate, the range of dielectric constant value obtained according to different material components is about 30-150 at a frequency of 1 MHz, and the dispersion factor is about 0.02-0.07.
8.在热性质测试上,除了可通过288℃的耐焊锡测试外,Tg也在180~220℃范围。8. In terms of thermal properties, in addition to passing the solder resistance test at 288°C, the Tg is also in the range of 180-220°C.
本发明所使用的典型原料如下:Typical raw materials used in the present invention are as follows:
◆环氧树脂◆Epoxy resin
其中n为0~10; where n is 0-10;
(b)双酚-A环氧树脂(Diglycidyl ether of bisphenol A epoxy)(b) Bisphenol-A epoxy resin (Diglycidyl ether of bisphenol A epoxy)
(c)四溴化双酚-A环氧树脂(Tetrabromo bisphenol A diglycidyl etherepoxy)(c) Tetrabromo bisphenol A diglycidyl etherepoxy
(d)环脂肪族环氧树脂(Cyclo aliphatic epoxy resin)(d) Cyclo aliphatic epoxy resin
例如,二环戊烷环氧树脂(dicyclopentadiene epoxy resin)For example, dicyclopentadiene epoxy resin
(e)含萘环环氧树脂(Naphthalene epoxy resin)(e) Naphthalene epoxy resin
(f)双苯基环氧树脂(Diphenylene epoxy resin)(f) Diphenylene epoxy resin
(g)酚醛清漆环氧树脂(Phenolic novolac epoxy resin)(g) Phenolic novolac epoxy resin
(h)邻甲酚酚醛清漆(Novolac)环氧树脂(o-cresol Novolac epoxy resin)(h) o-cresol Novolac epoxy resin
◆硬化剂◆Hardener
(a)双胺(diamine):H2N-R1-NH2 (a) Diamine: H 2 NR 1 -NH 2
R1可为芳香基、脂肪基、环脂肪基或含硅烷脂肪基,例如 R can be aromatic, aliphatic, cycloaliphatic or silane-containing aliphatic, for example
R2:-,CH2,SO2,O,S,或C(CH3)2 R 2 : -, CH 2 , SO 2 , O, S, or C(CH 3 ) 2
R3~R10:H,CH3,C2H5,C3H7,或C(CH3)3 R 3 to R 10 : H, CH 3 , C 2 H 5 , C 3 H 7 , or C(CH 3 ) 3
(b)苯酚树脂(phenol resin)(b) Phenol resin (phenol resin)
酚醛树脂(Phenolic resin) Phenolic resin
例如For example
萘酚类树脂(Naphthol based resin) Naphthol based resin
例如For example
萜酚醛树脂(Terpene phenol resin) Terpene phenol resin
二环戊烷树脂(Dicyclopentadiene resin) Dicyclopentadiene resin
4,4’,4”-乙缩醛三苯酚(4,4’,4”-Ethylidene trisphenol) 4,4',4"-Ethylidene trisphenol (4,4',4"-Ethylidene trisphenol)
四羟苯乙烷(Tetra phenylolethane) Tetraphenylolethane
四羟二甲苯乙烷(Tetraxylenol ethane) Tetraxylenol ethane
四甲酚乙烷(Tetracresololethane_ Tetracresololethane (Tetracresololethane_
◆硬化促进剂◆hardening accelerator
(a)阳离子系触媒(a) Cationic catalyst
三氟化硼错物,如RNH2·BF3,R2NH·BF3,R3N·BF3等,其中R可为芳香基、脂肪基或环脂肪基Boron trifluoride compound, such as RNH 2 BF 3 , R 2 NH BF 3 , R 3 N BF 3 , etc., where R can be aromatic, aliphatic or cycloaliphatic
(b)阴离子系触媒(b) Anion catalyst
三级胺、金属氢氧化物、单环氧化物的配位阴离子触媒,如R3N,NCH2C-C(NH)-N(CH3)2等,其中R可为芳香基、脂肪基或环脂肪基Coordination anion catalysts of tertiary amines, metal hydroxides, and monoepoxides, such as R 3 N, NCH 2 CC(NH)-N(CH 3 ) 2, etc., where R can be aromatic, aliphatic or cyclic fat base
(c)咪唑(Imidazole)(c) Imidazole
1-甲基咪唑(1-methylimidazole)1-methylimidazole (1-methylimidazole)
1,2-二甲基咪唑(1,2-dimethylimidazole)1,2-Dimethylimidazole (1,2-dimethyllimidazole)
2-十五烷基咪唑(2-heptadecylimidazole)2-pentadecylimidazole (2-heptadecylimidazole)
2-乙基-4-甲基咪唑(2-ethyl-4-methylimidazole)2-ethyl-4-methylimidazole (2-ethyl-4-methylimidazole)
◆催化剂◆Catalyst
苯基膦化合物Phenylphosphine compounds
三苯基膦(triphenylphosphine)Triphenylphosphine
◆碳黑◆Carbon black
1.导电性碳黑1. Conductive carbon black
2.具有COOH或OH官能基的碳黑2. Carbon black with COOH or OH functional groups
◆无机填充物◆Inorganic filler
主要为高介电的强介电性(Ferroelectric)陶瓷粉体,例如:BaTiO3,SrTiO3,Ba(Sr)TiO3,植入金属离子的BaTiO3,SrZrO3等It is mainly ferroelectric ceramic powder with high dielectric strength, such as BaTiO 3 , SrTiO 3 , Ba(Sr)TiO 3 , BaTiO 3 implanted with metal ions, SrZrO 3 , etc.
◆柔软剂◆Softener
可应用于本发明的柔软剂包括聚酯类(polyester)、聚酰胺(polyamide)、聚酰胺-酰亚胺(polyamide-imide)、聚乙烯缩丁醛(polyvinyl Butyral)、人造橡胶(例如Carboxyl-Terminated Butadiene Acrylonitrile,CTBN)、聚己酸内酯(polycaprolactone,(R-[-O[-CO(CH2)5-O-]n-]f),脂肪链型环氧树脂等The softening agent that can be applied to the present invention includes polyester (polyester), polyamide (polyamide), polyamide-imide (polyamide-imide), polyvinyl butyral (polyvinyl Butyral), artificial rubber (such as Carboxyl- Terminated Butadiene Acrylonitrile, CTBN), polycaprolactone (polycaprolactone, (R-[-O[-CO(CH 2 ) 5 -O-] n -] f ), aliphatic chain epoxy resin, etc.
脂肪链型环氧树脂:Aliphatic chain epoxy resin:
以上这些不同种类柔软剂,由于在结构上的差异而使得其与树脂系统的反应性与兼容性有差别,对柔软性的增益也有不同,因此亦可采用混合使用方式来实现成柔软化的目的,以便同时兼顾制造时的加工性和最后铜箔基板的耐热性包括耐焊锡性与Tg温度。The above different types of softeners have different reactivity and compatibility with the resin system due to structural differences, and also have different gains in flexibility, so they can also be used in combination to achieve the purpose of softening , in order to take into account both the processability during manufacturing and the heat resistance of the final copper foil substrate, including solder resistance and Tg temperature.
◆分散剂◆Dispersant
本发明中采用高分子型分散剂,使其与无机粉体具有良好的附着性,且又与有机树脂间有优良的兼容性及些许反应性,可大幅提升基板的耐热性与可靠性。可使用的高分子分散剂包括有共聚酯-酰胺、聚酯或聚酰胺等。The polymer dispersant used in the present invention has good adhesion with inorganic powder, and has excellent compatibility and slight reactivity with organic resin, which can greatly improve the heat resistance and reliability of the substrate. Usable polymeric dispersants include copolyester-amides, polyesters or polyamides, and the like.
◆其它添加剂◆Other additives
□稀释剂(diluent)与增黏结剂(adhesion promoter) □ diluent and adhesion promoter
□硅烷类偶合剂(Silane Coupling agent),如环氧硅烷(epoxysilane) □Silane coupling agent (Silane Coupling agent), such as epoxysilane (epoxysilane)
或胺基硅烷(Aminosilane)等or aminosilane (Aminosilane), etc.
本发明将由下列实施例被进一步了解,这些实施例仅作为说明之,而非用于限制本发明范围。The present invention will be further understood from the following examples, which are given by way of illustration only and are not intended to limit the scope of the invention.
具体实施方式Detailed ways
实施例与比较例:Embodiment and comparative example:
使用不同原料组成,其含量如表一所示,实施例1及2的做法首先在反应器中加入适量的环氧树脂,包括双酚-A环氧树脂(bisphenol-A diglycidylether)(Epoxy 1)(代号188EL,长春树脂公司,中国台湾)、四溴化双酚-A环氧树脂(tetrabromo disphenol-A diglcidyl ether)(Epoxy 2)(代号BEB-350,长春公司,中国台湾)、环脂肪族环氧树脂(cyclo aliphatic epoxy)(Epoxy 3)(代号HP-7200,DIC公司,日本)、多官能基环氧树脂(Multifunctional epoxy)(Epoxy4)(前述环氧树脂(a),购自日本化药株式会社),加入适量的二甲基甲酰胺(dimethylformamide;DMF),而后加热至90℃~95℃使环氧树脂完全溶解。将溶解后的环氧树脂加入适量的碳黑(Degussa公司生产的代号为XE-2B的碳黑,及Cabot公司生产的代号为M800的碳黑,此两种碳黑的重量比为1∶1),使用高速搅拌机高速搅拌分散碳黑,分散后加入三苯基膦0.1重量%,升温到105℃,反应4小时。再加入适量的硬化剂4,4’-伸甲基二苯胺(4,4’-Methylenedianiline)(ACROS公司,美国),以及适当的硬化促进剂2-乙基-4-甲基咪唑(2-Ethyl-4-methylimidazole)(ACROS公司,美国)。当硬化剂及硬化促进剂完全溶解于环氧树脂溶液中,再加入适量的高分子型分散剂Hypermer(Uniqema公司,美国),以及不同的柔软剂如聚乙烯缩丁醛(polyvinylButyral)(PVB,长春树脂公司,中国台湾)(柔软剂1)、CTBN(ZEON Chemical公司,美国)(柔软剂2),使其完全溶解而后降至室温。随后加入适量不同大小比例粒径的高介电填充物(如BaTiO3 A:BaTiO3平均粒径0.8μm;BaTiO3 B:BaTiO3平均粒径60nm),以高速搅拌均匀,形成树脂/BaTiO3/碳黑混成溶液。Use different raw materials to form, and its content is as shown in Table 1, the way of embodiment 1 and 2 first adds appropriate amount of epoxy resin in the reactor, comprises bisphenol-A epoxy resin (bisphenol-A diglycidylether) (Epoxy 1) (code name 188EL, Changchun Resin Company, Taiwan, China), tetrabromo bisphenol-A epoxy resin (tetrabromo disphenol-A diglcidyl ether) (Epoxy 2) (code name BEB-350, Changchun Company, China Taiwan), cycloaliphatic Epoxy resin (cyclo aliphatic epoxy) (Epoxy 3) (code name HP-7200, DIC company, Japan), multifunctional epoxy resin (Multifunctional epoxy) (Epoxy4) (the aforementioned epoxy resin (a), purchased from Nippon Chemical Pharmaceutical Co., Ltd.), add an appropriate amount of dimethylformamide (dimethylformamide; DMF), and then heat to 90 ° C ~ 95 ° C to completely dissolve the epoxy resin. Add appropriate amount of carbon black (the code name XE-2B carbon black that Degussa company produces, and the code name M800 carbon black that Cabot company produces, the weight ratio of these two kinds of carbon blacks is 1: 1 by the epoxy resin after dissolving ), using a high-speed mixer to stir and disperse carbon black at a high speed, add 0.1% by weight of triphenylphosphine after dispersion, heat up to 105°C, and react for 4 hours. Then add an appropriate amount of hardening agent 4,4'-methylenedianiline (4,4'-Methylenedianiline) (ACROS company, the U.S.), and a suitable hardening accelerator 2-ethyl-4-methylimidazole (2- Ethyl-4-methylimidazole) (ACROS company, USA). When the hardener and the hardening accelerator are completely dissolved in the epoxy resin solution, add an appropriate amount of polymer dispersant Hypermer (Uniqema company, U.S.), and different softeners such as polyvinylbutyral (polyvinylButyral) (PVB, Changchun Resin Company, Taiwan, China) (softening agent 1), CTBN (ZEON Chemical Company, the U.S.) (softening agent 2), make it dissolve completely and then drop to room temperature. Then add an appropriate amount of high-dielectric fillers with different sizes and ratios (such as BaTiO 3 A: the average particle size of BaTiO 3 is 0.8 μm; BaTiO 3 B: the average particle size of BaTiO 3 is 60 nm), and stir evenly at high speed to form a resin/BaTiO 3 / carbon black mixed solution.
比较例1至5的混成溶液使用类似实施例1及2的步骤但依表一的配方加予制备,其中比较例4的碳黑为直接添加于树脂、而未高温加热与环氧树脂反应。The mixed solutions of Comparative Examples 1 to 5 were prepared using steps similar to Examples 1 and 2 but according to the formula in Table 1. The carbon black in Comparative Example 4 was directly added to the resin without heating at high temperature to react with the epoxy resin.
将表一所配制不同比例不同组成的混成溶液,分别使用球磨机分散,再将分散后所形成的有机/无机混成溶液使用刮刀涂布于铜箔上,并加热烘烤去除溶剂(100℃,3小时),使之部分硬化(partially cure)形成所谓的背胶铜箔RCC(Resin Coated Copper),并分别将这些背胶铜箔与铜箔高温压合硬化(压合温度约200℃,2.5小时),形成有机/无机混成铜箔基板材料,最后分别测试其物性,列于表二。Mixed solutions with different proportions and different compositions prepared in Table 1 were dispersed using a ball mill, and then the organic/inorganic mixed solutions formed after dispersion were coated on copper foil with a scraper, and heated and baked to remove the solvent (100 ° C, 3 Hours), to partially harden it (partially cure) to form the so-called RCC (Resin Coated Copper), and press these back-adhesive copper foils and copper foils to harden at high temperature (pressing temperature is about 200 ° C, 2.5 hours ) to form an organic/inorganic hybrid copper foil substrate material, and finally tested its physical properties, which are listed in Table 2.
表一
表二
a)剥离强度依IPC-650方法测量 a) Peel strength measured according to IPC-650 method
b)挠曲性依IPC-650方法评估 b) Flexibility is evaluated according to IPC-650 method
c)现行PCB制程加工 c) Current PCB process processing
d)耐焊锡性是在2atm,110℃下加热2小时再于288℃测试3分钟 d) Solder resistance is tested at 2atm, 110°C for 2 hours and then tested at 288°C for 3 minutes
比较例1和2使用单一种粒径的BaTiO3,未添加BaTiO3纳米粉体,在相同BaTiO3比例下,其制程加工性差且剥离强度(peeling strength)均不佳;若能添加适量柔软剂(比较例2),则可改善挠曲性与制程加工性,唯独剥离强度依然不佳,主要来自流胶量不足所致。不同粒径的BaTiO3的添加可增加BaTiO3的堆积密度,提高介电常数,并由于BaTiO3纳米粉体的增加可提高流胶量、增加黏结,此外耐焊性亦被改善,可由比较例2,3中看出。当然Tg上扬的一重要因素是环氧树脂系统的选择,原则上添加多官能基环氧树脂才能大幅提高Tg。此外,比较例4中碳黑为直接添加于树脂、而未高温加热与环氧树脂反应,其分散因子较实施例1,2高很多,故碳黑与环氧树脂预先反应可降低散失因子。Comparative examples 1 and 2 use a single particle size of BaTiO 3 without adding BaTiO 3 nanopowder. Under the same ratio of BaTiO 3 , the processability of the process is poor and the peeling strength (peeling strength) is not good; if an appropriate amount of softener can be added (Comparative Example 2), the flexibility and processability can be improved, but the peel strength is still not good, which is mainly caused by insufficient glue flow. The addition of BaTiO 3 with different particle sizes can increase the bulk density of BaTiO 3 , increase the dielectric constant, and because of the increase of BaTiO 3 nano-powder, it can increase the flow rate and increase the bonding. In addition, the solder resistance is also improved, which can be obtained from the comparative example 2, 3 can be seen. Of course, an important factor for the increase of Tg is the choice of epoxy resin system. In principle, the addition of multifunctional epoxy resin can greatly increase Tg. In addition, in Comparative Example 4, the carbon black was directly added to the resin without heating at high temperature to react with the epoxy resin, and its dispersion factor was much higher than that of Examples 1 and 2. Therefore, pre-reaction of carbon black and epoxy resin can reduce the dissipation factor.
由以上的结果得知,要获得一类具有良好加工应用性的“高耐热性的高介电有机/无机混成物”,其配方中必须同时含有高Tg的环氧树脂、碳黑、碳黑与环氧树脂预反应、适当柔软剂、高分子型分散剂、以及至少两种粒径大小的高介电陶瓷粉体,且其中必含一种纳米粉体等等,如此才能制得一类真正具有应用价值的高介电的基板材料。From the above results, we know that in order to obtain a kind of "high heat resistance and high dielectric organic/inorganic hybrid" with good processing applicability, the formula must contain high Tg epoxy resin, carbon black, carbon Pre-reaction of black and epoxy resin, appropriate softener, polymer dispersant, and high dielectric ceramic powder with at least two particle sizes, and must contain a nano-powder, etc., so that a It is a kind of high dielectric substrate material with real application value.
本发明已被描述于上,熟悉本技术的人士仍可作出未脱离下列申请专利范围的多种变化及修饰。The present invention has been described above, and those skilled in the art can still make various changes and modifications without departing from the scope of the following claims.
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