Detailed Description
The technical solution of the present invention is further explained by the following embodiments.
One aspect of the present invention relates to a resin composition comprising an organic resin component (epoxy resin, active polyethersulfone, phenoxy resin) and an inorganic filler (nanosilica), and may further comprise the following optional components: curing agent, curing accelerator, solvent and other additives. The respective components of the resin composition of the present invention will be described in detail below.
-epoxy resins-
An epoxy resin is one of the main components of the resin composition of the present invention as a matrix resin. The epoxy resin of the present invention is not particularly limited, and it may be selected from organic compounds having a molecular structure containing at least two epoxy groups, for example, bisphenol a type epoxy resin, bisphenol F type epoxy resin, phenol novolac type epoxy resin, cresol novolac type epoxy resin, bisphenol a novolac type epoxy resin, tetramethylbisphenol F type epoxy resin, bisphenol M type epoxy resin, bisphenol S type epoxy resin, bisphenol E type epoxy resin, bisphenol P type epoxy resin, trifunctional phenol type epoxy resin, tetrafunctional phenol type epoxy resin, naphthalene type epoxy resin, naphthol novolac type epoxy resin, anthracene type epoxy resin, phenolphthalein type epoxy resin, phenoxy type epoxy resin, norbornene type epoxy resin, adamantane type epoxy resin, fluorene type epoxy resin, biphenyl type epoxy resin, dicyclopentadiene type epoxy resin, Dicyclopentadiene phenol type epoxy resins, aralkyl phenol type epoxy resins, epoxy resins containing an arylene ether structure in the molecule, alicyclic epoxy resins, polyhydric alcohol type epoxy resins, silicon-containing epoxy resins, nitrogen-containing epoxy resins, glycidyl amine epoxy resins, glycidyl ester epoxy resins, phosphorus-containing epoxy resins obtained by introducing a phosphorus compound into these resins, and the like.
Preferably, the epoxy resin can be one or a combination of more of bisphenol A epoxy resin, phosphorus-containing epoxy resin, novolac epoxy resin, biphenyl epoxy resin, dicyclopentadiene epoxy resin, alicyclic epoxy resin and bromine-free epoxy resin.
The phosphorus-containing epoxy resin refers to an epoxy resin in which a reactive phosphorus compound is used and a phosphorus atom is absorbed by a chemical bond. Examples of the reactive phosphorus compound may include 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, 10- (2, 5-dihydroxyphenyl) -10-hydro-9-oxa-10-phosphaphenanthrene-10-oxide, and the like. Commercially available phosphorous epoxy resins include XZ92530 (Dow chemical), YEP-250, YEP-300 (Guangshan chemical Co., Ltd.), and the like.
Active polyethersulfone-
By activated polyethersulfone is meant polyethersulfones having reactive end groups, examples of which include, but are not limited to, hydroxyl, amine, allyl, and epoxy groups.
The activated polyethersulfones of the present invention may have the following structural formula:
wherein R is1And R2Denotes a reactive end group, R1And R2May be the same or different, each independently selected from the group consisting of a hydroxyl group, an amine group, an allyl group and an epoxy group; n is an integer of 5 to 500.
The molecular weight of the active polyethersulfone may be in the range of 1000-100000, and in this range, the active polyethersulfone may be dissolved in a solvent, easily mixed and reacted with an epoxy resin or the like, and there is no problem of brittleness (low toughness) caused by an excessively small molecular weight.
The reactive end group of the reactive polyethersulfone may preferably be a hydroxyl group because the affinity with the epoxy resin may be greatly improved. When the polyethersulfone has active terminal hydroxyl groups, the content of active terminal hydroxyl groups may be in the range of 10 to 500. mu. eq/g, preferably 100. mu. eq/g.
In the resin composition of the present invention, the active polyethersulfone may be used in an amount of 20 to 100 parts by weight relative to 100 parts by weight of the epoxy resin. Preferably, the weight ratio of active polyethersulfone to epoxy resin may be 1:1 to 4.5.
Phenoxy resin-
The phenoxy resin used in the resin composition of the present invention may have the following structure:
wherein n is 50-150, and R1 and R2 may be the same or different and each independently represents a H atom, a Br atom or a P-containing group (e.g., DOPO, etc.).
In the resin composition of the present invention, the phenoxy resin may be used in an amount of 10 to 20 parts by weight, relative to 100 parts by weight of the epoxy resin. In addition, the dosage ratio of the phenoxy resin to the active polyethersulfone can be 1: 1-10, preferably 1: 2 to 4.
In the resin composition of the present invention, both the phenoxy resin and the active polyethersulfone have a toughening effect on the epoxy resin, and sometimes both may be collectively referred to as a toughening resin.
-nano silica-
The nanosilica that can be used in the present invention has a particle size of 100nm or less, preferably 10 to 40 nm. The nano-scale silica as an inorganic filler, in combination with the above toughening resin, can improve Tg (> 160 ℃), heat resistance, thermal decomposition temperature and dimensional stability of the resin composition, particularly improve DMA modulus and reduce Coefficient of Thermal Expansion (CTE).
In the invention, the dosage of the nano silicon dioxide can be between 2 percent and 10 percent of the total amount of the epoxy resin and the toughening resin. Preferably, the nano silica may be used in an amount of 2 to 10 parts by weight with respect to 100 parts by weight of the epoxy resin.
Curing agents
The resin composition of the present invention may contain a curing agent. The curing agent may be selected from curing agents for epoxy resins. In the present invention, amine-based curing agents and phenol resin curing agents are preferable. For example, the curing agent can be one or a combination of dicyandiamide, 4' -diaminodiphenyl sulfone, bisphenol a phenol formaldehyde and phenol formaldehyde.
In the present invention, the curing agent is used in an amount such that the equivalent ratio of the curing agent to the epoxy resin (equivalent ratio of amino group equivalent or hydroxyl group equivalent to epoxy equivalent) is 1:1 to 2.
Curing accelerators
The resin composition of the present invention may further contain a curing accelerator. In the case of an epoxy system using an amine or a phenol resin as a curing agent, the curing accelerator is preferably an imidazole compound, for example, imidazole (2-methylimidazole, 1-methylimidazole), etc., and derivatives thereof.
The curing accelerator may be used in an amount of 0.05 to 0.5 parts by weight, relative to 100 parts by weight of the organic resin component, to adjust gelation index of the resin composition and ensure stable process control.
-solvent-
The resin composition of the present invention may contain a solvent to dissolve the above epoxy resin, toughening resin, curing agent and the like together to form a glue solution. Preferably, the solvent may be one or a mixture of several of Dimethylacetamide (DMAC), Methyl Ethyl Ketone (MEK), acetone, cyclohexanone, and toluene. The mixed solvent may be, for example, a mixed solvent in which two or three of the above solvents are mixed at 1:1 or 1: 1.
In the present invention, the solvent is used in an appropriate amount to form a dope having a viscosity (e.g., 300-600 cPa. s) convenient for coating. For example, the solids content in the dope may be 40 wt% to 60 wt%.
Other additives
The resin composition of the present invention may further comprise other additives such as flame retardants, organic fillers, antioxidants, heat stabilizers, antistatic agents, ultraviolet absorbers, pigments, colorants, lubricants, and the like. These various additives may be used alone or in combination of two or more. The amount of other additives may be arbitrarily adjusted within a range not to lose the effect of the present invention.
Another aspect of the invention relates to a resin-coated copper foil and a method of making the same.
The resin-coated copper foil of the present invention comprises a copper foil and a resin layer on a roughened surface of the copper foil, wherein the resin layer is formed by coating the resin composition.
The copper foil used for the resin-coated copper foil may be an electrolytic copper foil.
When the resin-coated copper foil is manufactured, all components of the resin composition are dissolved together into glue solution through a solvent, then the glue solution is uniformly coated on the roughened surface of the copper foil, and the copper foil is baked in an oven at the temperature of 150-.
The resin-coated copper foil manufactured by the above method can be used for a high-density interconnected printed circuit board.
The present invention may have at least one of the following advantages:
(1) the resin composition with higher Tg can be obtained by adopting the active polyether sulfone, the nano silicon dioxide and the phenoxy resin to jointly reinforce and toughen the epoxy resin, the RCC does not fall off powder, the heat resistance is higher, the thermal shock (288 ℃/10S) reaches more than 20 times, the peel strength of the copper foil is also higher, and the flame retardance is excellent.
(2) RCC can be laminated for many times, and can meet the performance requirement and the processing technology requirement of any HDI PCB.
(3) The active polyether sulfone (especially polyether sulfone with terminal hydroxyl groups) and the phenoxy resin are jointly used as the toughening resin, so that the high Tg, the thermal decomposition temperature (Td), the Coefficient of Thermal Expansion (CTE), the DMA modulus and the heat resistance of the resin composition are improved, the peel strength of the copper foil is improved, namely, the defects of the phenoxy resin in the aspects of Tg and heat resistance are overcome, and other performance advantages of the phenoxy resin are retained.
(4) The nano silicon dioxide and the toughening resin are combined for use, so that a better reinforcing and toughening effect is achieved, the powder dropping property is improved, and the using amount is reduced.
(5) The resin composition of the invention is easy to prepare into glue solution, greatly simplifies the production process and improves the production efficiency.
Examples
The technical solutions of the present invention are further illustrated below by examples, which, however, do not limit the scope of the present invention in any way.
In the following examples, parts by mass of the organic resin are based on parts by mass of organic solids unless otherwise indicated.
The first embodiment is as follows:
the resin composition comprises: 50 parts of epoxy resin (YEP-250, Guangdong Guangshan), 20 parts of active polyether sulfone (SOLVAY, 3000RP) and nano SiO2(winning company, Nanopol A710) 3.2 parts, phenoxy resin (Inchem, PKHH)5 parts, and amine curing agent (dicyandiamide) 1 part. 0.1 part of imidazole accelerator (2-methylimidazole (2-MI)) and a proper amount of solvent (DMAC: MEK 1:1) are added into the composition to prepare glue solution with the solid content of 40-60%, the glue solution is uniformly stirred and mixed and then coated on the roughened surface of the electrolytic copper foil, and the roughened surface is baked in an oven at the temperature of 150 ℃ and 160 ℃ for 3-6 minutes to obtain a resin-coated copper foil (RCC) product. Two sheets of RCC resin were then stacked and laminated with the resin facing side, with the lamination ramp rate of 2-3 deg.C/min, and cured between 180 deg.C and 200 deg.C for 60-90 minutes, with the test properties shown in Table 1.
Example two:
the resin composition comprises: 60 parts of epoxy resin (Hemson corporation, EPIKOTE 627-B-80), 30 parts of polyether sulfone (SOLVAY, 3600RP) and nano SiO2(winning company, Nanopol A710), 10 parts of phenoxy resin (Inchem company, PKHH), and 20 parts of phenolic resin curing agent (Resolution company, EPIKURE YLH129B 65). 0.15 part of imidazole accelerator (2-MI) and a proper amount of solvent (DMAC: MEK ═ 1:1) are added into the composition to prepare glue solution with the solid content of 40-60%, the glue solution is uniformly stirred and mixed, then the glue solution is coated on the roughened surface of the electrolytic copper foil, and the roughened surface is baked in an oven at 150-160 ℃ for 3-6 minutes to obtain a resin-coated copper foil (RCC) product. Two sheets of RCC resin were then stacked and laminated with the resin facing side, with the lamination ramp rate of 2-3 deg.C/min, and cured between 180 deg.C and 200 deg.C for 60-90 minutes, with the test properties shown in Table 1.
Example three:
the resin composition comprises: 70 parts of epoxy resin (YEP-250, Guangdong Guangshan), 30 parts of polyether sulfone (SOLVAY, 3000RP) and nano SiO2(Yingchuang company Nanopol A710) 5 parts, phenol-oxygen resin (Xinri iron chemical Co., Ltd.)Sherf-001) 14 parts, and amine curing agent (dicyandiamide) 3 parts. 0.25 part of imidazole accelerator (2-MI) and a proper amount of solvent (DMAC: MEK ═ 1:1) are added into the composition to prepare glue solution with the solid content of 40-60%, the glue solution is evenly stirred and mixed and then coated on the rough surface of the electrolytic copper foil, and the rough surface is baked in an oven at 155 ℃ for 5 minutes to obtain a resin-coated copper foil (RCC) product. Two sheets of RCC resin were then stacked and laminated with the resin facing side, with the lamination ramp rate of 2-3 deg.C/min, and cured between 180 deg.C and 200 deg.C for 60-90 minutes, with the test properties shown in Table 1.
Example four:
the resin composition comprises: 90 parts of epoxy resin (Hemson company, EPIKOTE 627-B-80), 40 parts of polyether sulfone (SOLVAY, 3600RP) and nano SiO27.5 parts of (Nanopol A710, Wingsho company), 18 parts of phenoxy resin (PKHH, Inchem company) and 5 parts of amine curing agent (dicyandiamide and DDS). 0.25 part of imidazole accelerator (2-MI) and a proper amount of solvent (DMAC: MEK ═ 1:1) are added into the composition to prepare glue solution with the solid content of 40-60%, the glue solution is evenly stirred and mixed and then coated on the rough surface of the electrolytic copper foil, and the rough surface is baked in an oven at 155 ℃ for 6 minutes to obtain a resin-coated copper foil (RCC) product. Two sheets of RCC resin were then stacked and laminated with the resin facing side, with the lamination ramp rate of 2-3 deg.C/min, and cured between 180 deg.C and 200 deg.C for 60-90 minutes, with the test properties shown in Table 1.
Example five:
the resin composition comprises: 50 parts of epoxy resin (YEP-250, Guangdong Guangshan), 50 parts of polyether sulfone (SOLVAY, 3000RP) and nano SiO24 parts of Nanopol A710 (winning company), 5 parts of phenoxy resin (PKHH (Inchem company) and 2 parts of amine curing agent (dicyandiamide). 0.1 part of imidazole accelerator (2-MI) and a proper amount of solvent (DMAC: MEK ═ 1:1) are added into the composition to prepare glue solution with the solid content of 40-60%, the glue solution is evenly stirred and mixed and then coated on the rough surface of the electrolytic copper foil, and the rough surface is baked in an oven at 155 ℃ for 6 minutes to obtain a resin-coated copper foil (RCC) product. Two sheets of RCC resin were then stacked and laminated with the resin facing side, with the lamination ramp rate of 2-3 deg.C/min, and cured between 180 deg.C and 200 deg.C for 60-90 minutes, with the test properties shown in Table 1.
Comparative example one:
first, 30 parts by weight of a phenol resin (Resolution, EPIKURE YLH129B65) and 0.10 part by weight of an accelerator (2-MI) were dissolved in an appropriate amount of a mixed solvent (1: 1) of PM and Methyl Ethyl Ketone (MEK), and the mixture was stirred for 60 minutes or longer.
Then, 100 parts by weight of an epoxy resin (YEP-250, Guangdong mountain), 10 parts by weight of a biphenyl epoxy resin (NC-3000H, Nippon chemical), 20 parts by weight of a phenoxy resin (PKHH, Inc.) and 25 parts by weight of a core shell rubber (Nippon Brillouin MX-392, Japan) were added in this order, stirred for 4 hours or more and mixed well to form a solution having a resin content of 50%.
And uniformly coating the solution on the roughened surface of 1/2OZ electrolytic copper foil, and baking in an oven at the temperature of 150-160 ℃ for 3-5 minutes to obtain the resin-coated copper foil.
Two sheets of RCC resin were then stacked and laminated with the resin facing side, with the lamination ramp rate of 2-3 deg.C/min, and cured between 180 deg.C and 200 deg.C for 60-90 minutes, with the test properties shown in Table 1.
Comparative example two:
3 parts by weight of a curing agent (dicyandiamide) and 0.2 part by weight of an accelerator (2-MI) were dissolved in an appropriate amount of a mixed solvent (1: 1) of Dimethylformamide (DMF) and Methyl Ethyl Ketone (MEK), and the mixture was stirred for 60 minutes or longer.
Then, 100 parts by weight of an epoxy resin (YEP-250, Guangdong mountain, Guangdong province), 50 parts by weight of a biphenyl epoxy resin (NC-3000H, Japan chemical), 60 parts by weight of a phenoxy resin (PKHH, Inc.) and 15 parts by weight of a core shell rubber (Nippon Brillouin MX-392, Japan) were added in this order, stirred for 4 hours or more, and sufficiently mixed to obtain a solution having a resin content of 50%.
And uniformly coating the solution on the roughened surface of 1/2OZ electrolytic copper foil, and baking in an oven at the temperature of 150-160 ℃ for 3-5 minutes to obtain the resin-coated copper foil.
Two sheets of RCC resin were then stacked and laminated with the resin facing side, with the lamination ramp rate of 2-3 deg.C/min, and cured between 180 deg.C and 200 deg.C for 60-90 minutes, with the test properties shown in Table 1.
Comparative example three:
the resin composition comprises: 70 parts of epoxy resin (YEP-250, Guangdong Guangshan), 30 parts of polyether sulfone (SOLVAY, 3000RP) and nano SiO2(winning company Na)nopol A710) 5 parts, and an amine curing agent (dicyandiamide) 3 parts. 0.2 part of imidazole accelerator (2-MI) and a proper amount of solvent (DMAC: MEK ═ 1:1) are added into the composition to prepare glue solution with the solid content of 40-60%, the glue solution is evenly stirred and mixed and then coated on the rough surface of the electrolytic copper foil, and the rough surface is baked in an oven at 155 ℃ for 6 minutes to obtain a resin coated copper foil (RCC) product. Two sheets of RCC resin were then stacked and laminated with the resin facing side, with the lamination ramp rate of 2-3 deg.C/min, and cured between 180 deg.C and 200 deg.C for 60-90 minutes, with the test properties shown in Table 1.
Comparative example four:
the resin composition comprises: 60 parts of epoxy resin (YEP-250, Guangdong mountains in Guangdong province), 30 parts of polyether sulfone (SOLVAY, 3600RP), 10 parts of phenoxy resin (Inchem company, PKHH) and 2 parts of amine curing agent (dicyandiamide). 0.2 part of imidazole accelerator (2-MI) and a proper amount of solvent (DMAC: MEK ═ 1:1) are added into the composition to prepare glue solution with the solid content of 40-60%, the glue solution is evenly stirred and mixed and then coated on the rough surface of the electrolytic copper foil, and the rough surface is baked in an oven at 155 ℃ for 6 minutes to obtain a resin coated copper foil (RCC) product. Two sheets of RCC resin were then stacked and laminated with the resin facing side, with the lamination ramp rate of 2-3 deg.C/min, and cured between 180 deg.C and 200 deg.C for 60-90 minutes, with the test properties shown in Table 1.
Comparative example five:
the resin composition comprises: 60 parts of epoxy resin (YEP-250, Guangdong Guangshan) and nano SiO2(winning company, Nanopol A710), phenoxy resin (Inchem, PKHH)10 parts, and amine curing agent (dicyandiamide) 2 parts. 0.5 part of imidazole accelerator (2-MI) and a solvent (DMAC: MEK 1:1) are added into the composition to prepare a glue solution, the glue solution is uniformly stirred and mixed, then the glue solution is coated on the rough surface of the electrolytic copper foil, and the rough surface is baked in an oven at 155 ℃ for 6 minutes to obtain a resin-coated copper foil (RCC) product. Two sheets of RCC resin were then stacked and laminated with the resin facing side, with the lamination ramp rate of 2-3 deg.C/min, and cured between 180 deg.C and 200 deg.C for 60-90 minutes, with the test properties shown in Table 1.
Comparative example six:
the resin composition comprises: 90 parts of epoxy resin (Hemson corporation, EPIKOTE 627-B-80), 15 parts of polyether sulfone (SOLVAY, 3600RP) and nano SiO2(winning company, Nanopol A710), 20 parts of phenoxy resin (Inchem company, PKHH) and 5 parts of amine curing agent (dicyandiamide). 0.2 part of imidazole accelerator (2-MI) and a proper amount of solvent (DMAC: MEK 1:1) are added into the composition to prepare glue solution with the solid content of 40-60%, the glue solution is uniformly stirred and mixed, then the glue solution is coated on the rough surface of the electrolytic copper foil, and the rough surface is baked in an oven at 155 ℃ for 6 minutes to obtain a resin-coated copper foil (RCC) product. Two sheets of RCC resin were then stacked and laminated with the resin facing side, with the lamination ramp rate of 2-3 deg.C/min, and cured between 180 deg.C and 200 deg.C for 60-90 minutes, with the test properties shown in Table 1.
Comparative example seven:
the resin composition comprises: 90 parts of epoxy resin (Hemson company, EPIKOTE 627-B-80), 60 parts of polyether sulfone (SOLVAY, 3600RP) and nano SiO2(winning company, Nanopol A710), 20 parts of phenoxy resin (Inchem company, PKHH) and 5 parts of amine curing agent (dicyandiamide). 0.3 part of imidazole accelerator (2-MI) and a proper amount of solvent (DMAC: MEK ═ 1:1) are added into the composition to prepare glue solution with the solid content of 40-60%, the glue solution is evenly stirred and mixed and then coated on the rough surface of the electrolytic copper foil, and the rough surface is baked in an oven at 155 ℃ for 6 minutes to obtain a resin coated copper foil (RCC) product. Two sheets of RCC resin were then stacked and laminated with the resin facing side, with the lamination ramp rate of 2-3 deg.C/min, and cured between 180 deg.C and 200 deg.C for 60-90 minutes, with the test properties shown in Table 1.
Comparative example eight:
the resin composition comprises: 60 parts of epoxy resin (Hemson corporation, EPIKOTE 627-B-80), 30 parts of polyether sulfone (SOLVAY, 3600RP) and nano SiO2(winning company, Nanopol A710), phenoxy resin (Inchem company, PKHH)10 parts, and phenolic resin curing agent (Resolution company, EPIKURE YLH129B65)10 parts. And adding 0.15 part of imidazole accelerator (2-MI) and 100 parts of solvent (DMAC: MEK ═ 1:1) into the composition to prepare a glue solution, uniformly stirring and mixing the glue solution, coating the glue solution on the roughened surface of the electrolytic copper foil, and baking the copper foil in an oven at 150-160 ℃ for 3-6 minutes to obtain a resin-coated copper foil (RCC) product. Then two sheets of RCC resin are stacked and laminated facing the resin surface, the heating rate of the lamination is 2-3 ℃/min, the lamination is cured for 60-90 min at the temperature of 180-200 ℃, and finally the detection performance is shown in Table 1.
Comparative example nine:
the resin composition comprises: 60 parts of epoxy resin (Hemson corporation, EPIKOTE 627-B-80), 30 parts of polyether sulfone (SOLVAY, 3600RP) and nano SiO2(winning company, Nanopol A710), 10 parts of phenoxy resin (Inchem company, PKHH), and 40 parts of phenolic resin curing agent (Resolution company, EPIKURE YLH129B 65). 0.15 part of imidazole accelerator (2-MI) and 100 parts of solvent (DMAC: MEK ═ 1:1) are added into the composition to prepare glue solution, the glue solution is uniformly stirred and mixed, then the glue solution is coated on the roughened surface of the electrolytic copper foil, and then the roughened surface is baked in an oven at 150-160 ℃ for 3-6 minutes to obtain a resin coated copper foil (RCC) product. Then two sheets of RCC resin are stacked and laminated facing the resin surface, the heating rate of the lamination is 2-3 ℃/min, the lamination is cured for 60-90 min at the temperature of 180-200 ℃, and finally the detection performance is shown in Table 1.
The test method of the above characteristics is as follows:
(1) glass transition temperature (Tg): the determination was carried out using the DMA (dynamic thermal analysis) test according to the DMA test method specified in IPC-TM-6502.4.24.
(2) Modulus (100 ℃): the determination was carried out using the DMA (dynamic thermal analysis) test according to the DMA test method specified in IPC-TM-6502.4.24.
(3) Coefficient of Thermal Expansion (CTE): the measurement was carried out by using a thermomechanical analyzer (TMA) test according to the TMA test method specified by IPC-TM-6502.4.24.1.
(4) Peel strength: the test is specified with reference to IPC-TM-650.
(5) Thermal decomposition temperature (Td 5% loss): the test is specified with reference to IPC-TM-650.
(6) Evaluation of Heat resistance: referring to IPC-TM-650 specified test, after etching the copper foil on the surface of the copper clad laminate, evaluating the substrate; the substrate was immersed in a tin furnace at 288 ℃ for 10s each, and the number of immersion times at which blistering or delamination occurred was measured.
(7) Reflow soldering: reference JEDEC Standard 22-A113D)
(1) The heating rate is as follows: 3 ℃/sec Max (recommended)
(2)150 ℃ and 260 ℃ for more than 150 sec.
(3) The maximum temperature is maintained at 260 ℃ for more than 20sec, and the maximum temperature is maintained at 25-260 ℃ for 3-5 min.
As can be seen from the test results, the glass transition temperature (Tg), the thermal decomposition temperature (Td), the Coefficient of Thermal Expansion (CTE), the DMA modulus at 100 ℃, and the heat resistance of the examples of the present invention are higher and the dusting property is improved, compared to the comparative example one and the comparative example two to which polyethersulfone and nano-silica are not added; compared with a third comparative example without the phenolic resin, the peel strength of the examples of the invention is higher; without adding nano SiO2Comparative example four, the inventive examples have higher modulus and lower CTE; compared with the fifth comparative example without polyether sulfone, the Tg, Td, CTE, modulus and heat resistance of the inventive example are all higher; compared with the sixth comparative example with less active polyether sulfone, the Tg, modulus and CTE of the embodiment of the invention are higher, and the heat resistance is improved; compared with the seventh comparative example in which the use amount of the active polyether sulfone exceeds the range required by the scheme, the peel strength of the embodiment of the invention is higher; compared with the eighth and ninth comparative examples in which the equivalent ratio of the curing agent to the epoxy resin does not satisfy the requirements of the present application, the examples of the present invention are better in peel strength, powder falling property and heat resistance. Therefore, all the performances of the embodiment of the invention are excellent, and the use requirements of any layer of high-density interconnection PCB with higher performance can be better met.
The foregoing merely illustrates some preferred embodiments of the invention. Although the present invention has been described in detail by way of the above-described embodiments, the present invention is not limited to the above-described details, i.e., it is not intended that the present invention be implemented by relying on the above-described details. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.