WO2015106479A1 - 电路基板及其制备方法 - Google Patents
电路基板及其制备方法 Download PDFInfo
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- WO2015106479A1 WO2015106479A1 PCT/CN2014/072233 CN2014072233W WO2015106479A1 WO 2015106479 A1 WO2015106479 A1 WO 2015106479A1 CN 2014072233 W CN2014072233 W CN 2014072233W WO 2015106479 A1 WO2015106479 A1 WO 2015106479A1
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- Prior art keywords
- resin
- glue
- cloth
- glass fiber
- preparation
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Classifications
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- H—ELECTRICITY
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- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
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- C03C25/28—Macromolecular compounds or prepolymers obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C03C25/30—Polyolefins
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
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- C03C25/10—Coating
- C03C25/24—Coatings containing organic materials
- C03C25/26—Macromolecular compounds or prepolymers
- C03C25/32—Macromolecular compounds or prepolymers obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
- C03C25/326—Polyureas; Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/24—Coatings containing organic materials
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- C03C25/32—Macromolecular compounds or prepolymers obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
- C03C25/36—Epoxy resins
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
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- H05K1/0366—Organic insulating material consisting of two or more materials, e.g. two or more polymers, polymer + filler, + reinforcement reinforced, e.g. by fibres, fabrics
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
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- H05K1/03—Use of materials for the substrate
- H05K1/0393—Flexible materials
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/0011—Working of insulating substrates or insulating layers
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/0085—Apparatus for treatments of printed circuits with liquids not provided for in groups H05K3/02 - H05K3/46; conveyors and holding means therefor
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
- C08J2323/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2363/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2371/00—Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain; Derivatives of such polymers
- C08J2371/08—Polyethers derived from hydroxy compounds or from their metallic derivatives
- C08J2371/10—Polyethers derived from hydroxy compounds or from their metallic derivatives from phenols
- C08J2371/12—Polyphenylene oxides
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2379/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen, or carbon only, not provided for in groups C08J2361/00 - C08J2377/00
- C08J2379/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/02—Fillers; Particles; Fibers; Reinforcement materials
- H05K2201/0275—Fibers and reinforcement materials
- H05K2201/029—Woven fibrous reinforcement or textile
Definitions
- the invention belongs to the technical field of electronic materials, and relates to a circuit substrate and a manufacturing method thereof, and particularly relates to a microscopic uniformity and an isotropic circuit substrate and a manufacturing method thereof, and more particularly to a dielectric constant in a A circuit board having a small difference from the weft direction and a method of manufacturing the same.
- the circuit boards used have been developed in the direction of multi-layering, high-density wiring, and high-speed signal transmission, and the circuit board-metal foil-clad laminate
- the comprehensive performance of CCL has put forward higher requirements.
- the dielectric constant (Dk) and dielectric loss (Df) of the dielectric are important indicators that affect signal transmission speed and signal quality.
- Dk dielectric constant
- Df dielectric loss
- the signal integrity is mainly related to the dielectric loss of the dielectric material and the surface roughness of the copper foil conductor.
- the data transmission rate will become higher and faster.
- the data transmission rate has risen from the traditional 5 Gbps to 10 Gbps, and even 25 Gbps.
- the transmission wavelength of digital signals is getting shorter and shorter.
- the signal delay has less influence on the signal integrity due to the longer transmission wavelength of the digital signal.
- the transmission rate is higher than 10 Gbps, the signal delay becomes a must in the high-speed transmission link. problem.
- copper-clad laminates play a key role in signal transmission
- the role of the laminate material as the transmission medium determines the quality of the signal transmission.
- copper-clad laminate materials generally use electronic grade glass fiber cloth as a reinforcing material, immersed in a thermosetting resin, and obtained by drying, laminating, and hot pressing. Due to the use of woven materials as reinforcing materials (such as fiberglass cloth), the woven fiber cloth is insulated due to the reason of weaving and the intersection of the cross-section of the woven fibers.
- the main technical means include (1) increasing the degree of fiberglass cloth opening; (2) using a film form reinforcing material instead of the fiber woven material; (3) A reinforcing material having a lower dielectric constant, such as a low dielectric constant glass fiber cloth.
- the glass fiber cloth is further hooked by means of fiber opening, due to the preparation process and structure of the glass fiber cloth, it is currently only uniform in the weft direction, and can only be relatively conventional in the warp direction.
- the fiber-opening fiber cloth is looser and cannot be completely opened and homogenized, which results in the glass fiber cloth not being able to achieve complete uniformity in the plane direction; it is very difficult to implement in the process by using the film form: Poor operability, poor adhesion to resin, easy delamination; by using a low dielectric constant glass fiber cloth, the dielectric constant of the reinforcing material can be reduced to some extent, but it is still different from the low dielectric constant resin composition currently used. If it is enlarged, the uniformity of the dielectric constant in the plane direction cannot be satisfied.
- the conventional epoxy resin is replaced by a modified epoxy resin, a cyanate resin, a bismaleimide resin, a polyphenylene ether resin, a hydrocarbon resin, and a thermoplastic material such as polytetrafluoroethylene, a liquid crystal resin, or the like. It has a very low dielectric constant and dielectric loss characteristics, which can provide better high-speed transmission characteristics.
- the dielectric constant and dielectric loss of the copper clad laminate material can also be reduced by changing the reinforcing material, since the conventional general reinforcing material is an electronic grade glass fiber cloth (E type fiberglass cloth), its own dielectric constant For the 6.2 to 6.6, the dielectric constant of the resin portion used is much higher, this The Dk of the copper clad laminate material is generally between 3.5 and 4.5.
- the skilled person has also proposed to replace the traditional electronic grade glass with a low dielectric constant glass fiber cloth.
- the fiber cloth because the low dielectric constant glass fiber cloth Dk is 4.4 to 4.6, can greatly reduce the dielectric constant of the entire laminate material, can effectively improve the signal transmission rate, and, in addition, due to its dielectric loss (Df) value ratio
- the electronic grade fiberglass cloth is also low, which also helps to improve the loss of the signal transmission process, and significantly improves the signal integrity problem caused by the signal transmission rate and frequency rise.
- the Dk of the reinforcing material is much higher than The Dk of the resin composition is as follows:
- the dielectric constant of the resin composition currently applied to the high-speed material is remarkably lower than that of the reinforcing material-glass cloth, and the dielectric constant of the final laminate is the resin composition and increase.
- the weighted sum of strong materials is shown in the following formula.
- Dk fine the dielectric constant of the reinforcing material
- the copper-clad laminate material composed of the resin composition and the reinforcing material has a high Dk in the place where the warp and weft are interlaced due to the unevenness of the microstructure of the woven structure of the reinforcing material.
- the warp or weft is Dk is relatively high, and where there is no yarn, the Dk is low, and this unevenness causes a microscopic difference in the dielectric constant of the dielectric layer.
- the transmission time of the signal is determined by the transmission speed and the transmission distance.
- the transmission speed is inversely proportional to the dielectric constant of the transmission medium, which is directly caused by the microscopic difference of the dielectric constant of the surrounding medium corresponding to the transmission line.
- the time from the emitting end to the receiving end is inconsistent, resulting in signal mismatch and immediate delay.
- the signal delay is divided into a warp signal delay and a latitudinal signal delay.
- the warp signal delay refers to a signal delay when the transmission line is routed in the warp direction of the circuit substrate, and the latitudinal signal delay refers to the transmission line on the circuit substrate. Signal delay when wiring in the latitudinal direction.
- the laminate material is flat.
- the non-uniformity in the plane direction causes the dielectric constant and dielectric loss of the laminate material on the microstructure to be anisotropic, and there are also large differences in microscopic appearance in different places in the same plane direction.
- engineers have taken various measures to solve the signal integrity problem, and the method of transmitting high-speed digital signals by using differential lines is one of them.
- the differential line in the PCB is a coupled strip line or a coupled microstrip line. When the signal is transmitted on the above, it is an odd-mode transmission method. Therefore, the differential signal has the advantages of strong anti-interference and easy matching.
- differential lines With the increase of the information transmission rate requirement of digital circuits, the differential transmission mode of signals will be more and more widely used.
- the main advantages of differential lines are: strong anti-interference ability, effective suppression of electromagnetic interference, accurate timing positioning, etc. Therefore, the use of differential lines to transmit high-speed signals, on the one hand, is of great benefit to the signal integrity and low power consumption of the PCB system, on the other hand, it also puts higher requirements on the PCB design level.
- Cia Patent No. CN102548200A discloses a circuit substrate comprising a glass film which is roughened by surface roughening, a resin bonding layer respectively located on the rough layers on both sides of the glass film, and a metal located outside the resin bonding layer.
- the foil, the glass film, the resin bonding layer, and the metal foil are bonded together by pressing.
- the glass film is easily broken when pressed; and the surface roughening treatment process of the glass film is troublesome and difficult to control, and at the same time, the roughening treatment will destroy the isotropic characteristics of the glass film to some extent; in addition, the glass film is used for production.
- the process is different from the conventional CCL production process, and equipment modification and adjustment are required.
- European Patent EP 1140373A first impregnates a glass cloth with a solution having a relatively low solid content containing a curable resin, drying it, impregnating it with a solution having a relatively high solid content of a curable resin, and finally curing it. Reducing the solids content of the resin solution to increase the solvent content and lower the viscosity is aimed at increasing the permeability of the resin to reduce the amount of voids in the prepreg and the cured article, and how to reduce the Dk and solve the signal delay problem is not mentioned.
- Chinese patent CN101494949A discloses that the glass cloth is opened before the sizing process of the glass cloth. Or flattening, and then immersed in epoxy resin glue and dried to obtain an insulating material layer, thereby reducing the signal loss of the copper-clad substrate, increasing the signal propagation speed and reducing the production cost.
- Chinese patent CN101570640B discloses a prepreg prepared by using a quartz glass cloth (preferably open fiber) with a sparsely dense quartz glass fiber as a substrate, and a thermosetting resin composition having a dielectric loss of 0.003 or less, which is applied to a high-frequency material to ensure the medium. At the same time as the electric constant, the processing performance is improved.
- One of the objects of the present invention is to provide a method of preparing a bonding sheet for constituting a circuit substrate, comprising the step of performing a special pretreatment on a reinforcing material, the circuit substrate thus prepared having excellent dielectric properties, warp direction and The difference in latitudinal dielectric constant is small, and the microscopic uniformity of dielectric constant is achieved.
- the pretreatment glue is a glue obtained by dissolving a resin composition in an organic solvent; preferably, the glue further comprises a filler.
- the resin composition comprises a resin and a curing agent, wherein the resin is selected from the group consisting of epoxy resins, cyanate resins, polyphenylene ether resins, polybutadiene resins, polybutadiene, and styrene. Copolymer resin, polytetrafluoroethylene resin, polybenzoxazine resin, polyimide, silicone resin, bismaleimide resin, liquid crystal polymer, bismaleimide triazine resin, thermoplastic resin
- the curing agent is selected from the group consisting of a phenolic curing agent, an amine curing agent, a high molecular acid curing agent, and a living agent.
- an ester a radical initiator
- the organic solvent is selected from the group consisting of alcohols such as methanol, ethanol, and butanol, ethyl cellosolve, butyl cellosolve, ethylene glycol methyl ether, and diethylene glycol.
- Ethers such as diethyl ether and diethylene glycol butyl ether; ketones such as acetone, butanone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, aromatic hydrocarbons such as toluene, xylene, and mesitylene; , ethoxyethyl acetate, ethyl acetate and other esters, hydrazine, hydrazine-dimethylformamide, hydrazine, hydrazine-dimethylacetamide, hydrazine-methyl-2-pyrrolidone, etc.
- the resin composition further comprises a filler selected from the group consisting of silica, alumina, titania, barium titanate, barium titanate, magnesium titanate, calcium silicate, barium titanate, titanic acid And one or more of the glass frits;
- the silica comprises molten amorphous silica and crystalline silica, preferably molten amorphous silica, the titania comprising rutile and anatase titanium dioxide, Rutile type titanium dioxide is preferred.
- the reinforcing material is an electronic grade glass fiber cloth, a glass fiber nonwoven fabric, an aramid or other organic fiber woven fabric for a circuit substrate; more preferably, the reinforcing material is an electronic grade glass fiber. cloth.
- the pretreated fiberglass cloth has a resin content of from 20% by weight to 50% by weight.
- the mass per unit area of the pretreated glass cloth is ⁇ 3 (3 ⁇ 4/111 2 , the resin content of the pretreated glass cloth is 25 wt% to 50 wt% ; the pretreated glass fiber mass per unit area of fabric 30g / m 2 ⁇ 100g / m 2, the resin content of the glass fiber cloth is pretreated 20wt% ⁇ 45wt%; the fiberglass cloth pretreated mass per unit area of 100g / m 2 ⁇ 175g When /m 2 , the resin content of the pretreated glass cloth is 20% by weight to 40% by weight.
- the fiberglass cloth is an E-type fiberglass cloth
- the corresponding pretreatment glue has a Dk (10 GHz) of 6.2 to 6.6.
- the fiberglass cloth is a NE type fiberglass cloth
- the corresponding pretreatment glue has a Dk (10 GHz) of 4.4 to 4.6.
- the Dk of the resin is in the range of Dk ⁇ 10% of the fiberglass cloth; preferably, the Dk of the resin is in the range of Dk ⁇ 5% of the fiberglass cloth.
- Another object of the present invention is to provide a bonding sheet prepared according to the production method of the present invention.
- a third object of the present invention is to provide a circuit board made of the bonding sheet of the present invention.
- Fig. 1 is a schematic plan view showing the structure of an E-type glass fiber cloth.
- FIG. 2 is a schematic plan view showing the plane structure of an E-type glass fiber opened cloth.
- Figure 3 is a schematic cross-sectional view of an E-glass fiber cloth.
- Figure 4 shows the planar non-uniformity of the dielectric constant of the E-glass fabric.
- Figure 5 is a graph showing the planar uniformity of the dielectric constant of the pre-treated E-glass fabric of the present invention. Specific form
- the Dk used in the present invention means a dielectric constant, which is a value measured by the SPDR method at a frequency of 10 GHz.
- the Df used in the present invention means a dielectric loss value which is tested by the SPDR method at a frequency of 10 GHz.
- the fiberglass cloth used in the present invention refers to a glass fiber cloth, which is referred to as a fiberglass cloth, and the fiberglass cloth includes an E type fiberglass cloth, a NE type fiberglass cloth, an S type fiberglass cloth, a D type fiberglass cloth, and the like, each type
- the type of fiberglass cloth can be further divided into 7628, 2116, 1080, 106, 1037, 1078, 2112, 3313, 1500 and other specifications. It is well known to those skilled in the art that when the fiberglass cloth is applied in the field of circuit boards, its main function is As a reinforcing material for the circuit substrate.
- the resin composition used in the present invention means a composition comprising a resin and a curing agent.
- an epoxy resin composition refers to a composition comprising an epoxy resin and a suitable curing agent.
- Those skilled in the art can select a suitable curing agent and its amount depending on the resin to be used, and can also select a suitable organic solvent depending on the resin to be used and the curing agent.
- the filler used in the present invention refers to a filler material, referred to as a filler, and a filler used in the copper clad laminate industry. It is not only to reduce costs, but to improve the performance of CCL, such as the reduction of CTE, the improvement of flame retardancy, the thermal conductivity and the improvement of the mechanical properties of the board. With the development of filler technology, more and more new fillers are used in copper clad laminates, such as the functional fillers used in the present invention to adjust the pretreatment glue Dk.
- the pretreatment gum used in the present invention means a gum solution in which the resin composition of the present invention is dissolved in a suitable organic solvent.
- the pretreatment gum used in the present invention refers to a dispersion obtained by dissolving the resin composition of the present invention in a suitable organic solvent and then adding the filler.
- a suitable dielectric constant Dk:
- the Dk of the pretreatment glue is the Dk of the obtained gum after the solvent is removed from the pretreatment glue, and the value is only related to the amount of the resin composition and the filler, regardless of the amount of the solvent.
- the dipping used in the present invention refers to the operation of dipping the fiberglass cloth into the glue and then drying the solvent through the gluing machine.
- the prepreg used in the present invention refers to an operation of dipping a glass cloth into a pre-formed glue and then drying the solvent through a gluing machine.
- the main dipping used in the present invention refers to the operation of dipping the glass cloth into the main glue and then drying the solvent through the gluing machine.
- the content of the resin used in the present invention means the mass percentage of the solid composition including the resin in addition to the reinforcing fiberglass cloth in the pretreated glass cloth, the bonding sheet, and the circuit substrate, for example, a glue liquid.
- the resin composition contains a resin, a curing agent and a filler, and the resin content is the mass percentage of the tree, the curing agent and the filler.
- the resin content is a fixed term in the art. It is known to those skilled in the art that the resin content can be adjusted by adjusting the solid content of the pretreatment glue to adjust the gap of the gluing machine clamping shaft, the speed of the gluing machine, and the like. Process parameters to control.
- the specific method is to use Dk with the Dk characteristics of the fiberglass cloth, and the matching property is good.
- the difference between the dielectric constant and the weft direction is smaller, forming a semi-finished product for the main dipping reinforcement material - pretreatment fiberglass cloth .
- the pretreatment glue may be selected from a resin having a Dk equal to Dk ⁇ 10% of the fiberglass cloth, and preferably a resin having a Dk of Dk ⁇ 5%. The closer Dk is to the Dk of the fiberglass cloth, the smaller the difference in dielectric constant between the warp and weft directions, and the smaller the delay of the signal.
- the fiberglass cloth is one of an E-type fiberglass cloth and an NE-type fiberglass cloth.
- the E-type fiberglass cloth is pretreated, and the Dk (10 GHz) of the pretreatment glue is selected to be 6.2 to 6.6.
- the NE type fiberglass cloth is pretreated, and the Dk (10 GHz) of the pretreatment glue is selected to be 4 ⁇ 4 to 4.6.
- the resin content thereof is from 20% by weight to 50% by weight. If the resin content is too high, the prepreg will dissolve and mix with the main dipping solution after main immersion, which will affect the amount of sizing of the main dipping. If the resin content is too low, the void filling of the glass fiber cloth is not full, and the dielectric constant cannot be uniform in the warp and weft directions, which affects the signal transmission delay.
- the mass per unit area of the pretreated glass cloth is ⁇ 3 ( ⁇ /111 2 , the resin content of the treated glass cloth is 25 wt% to 50 wt%; the unit area of the pretreated glass cloth mass of 30g / m 2 ⁇ 100g / m 2 , the resin content of the glass fiber cloth is pretreated 20wt% ⁇ 45wt%; the fiberglass cloth pretreated mass per unit area of 100g / m 2 ⁇ 175g / m 2 when , fiberglass cloth pretreated resin content is 20wt% ⁇ 40wt% o
- the resin content of the pretreated glass fiber cloth is selected.
- the content of the tree is too high.
- the prepreg will be dissolved and mixed with the main dipping solution, which will affect the main dipping.
- the amount of glue at the same time, because the Dk of the general fiberglass cloth is much higher than the Dk of the main dipping liquid, resulting in the Dk of the circuit substrate prepared by the main immersion being too high, and the dielectric properties of the circuit substrate are deteriorated.
- the resin content is too low, the gap of the fiberglass cloth will not be filled. Full, the microscopic consistency of the dielectric constant in the warp and weft directions cannot be achieved, affecting the signal transmission delay.
- the resin composition comprises a resin, a curing agent, wherein the resin is selected from the group consisting of epoxy resin, cyanate resin, polyphenylene ether resin, polybutadiene resin, polybutadiene and styrene copolymer. Resin, polytetrafluoroethylene resin, polybenzoxazine resin, polyimide, silicone resin, bismaleimide resin, liquid crystal polymer, bismaleimide triazine resin, thermoplastic resin One or more. .
- the curing agent is selected from one or more of a phenolic curing agent, an amine curing agent, a high molecular acid anhydride curing agent, an active ester, a radical initiator, and the like.
- the filler is selected from the group consisting of silica (fused amorphous silica and crystalline silica-silicon), alumina, titania (rutile and anatase), barium titanate, barium titanate, titanic acid One or more of magnesium, calcium titanate, barium titanate, lead titanate, and glass powder.
- silica is preferably amorphous silica
- titanium dioxide is preferably rutile titanium dioxide.
- the pretreated glass fiber cloth is used to dry the organic solvent in the resin glue liquid.
- the pretreatment glue on the fiberglass cloth may undergo a crosslinking reaction, or may not occur. Cross-linking reaction.
- the method for pretreating the E-type fiberglass cloth is characterized in that:
- Step 2 Prepare a pretreatment glue according to the Dk (10 GHz) value of the selected E-type fiberglass cloth, and select a resin composition with a Dk equal to 10% of the E-type fiberglass cloth Dk soil, preferably Dk is equal to the E type. Glass fiber cloth Dk ⁇ 5% resin composition.
- Step 3 According to the mass per unit area of the pretreated fiberglass cloth, combined with the solid content of the pretreatment glue to adjust the process parameters such as the gap of the gluing machine clamping shaft and the speed of the gluing machine, when pretreating the glass fiber
- the resin content of the control pretreated glass cloth is 25 wt% ⁇ 50wt%
- the resin content of the pretreated glass cloth is controlled to be 20wt% to 45wt%
- the unit area of the pretreated fiberglass cloth is mass of 100g / m 2 ⁇ 175g / m 2, the control pretreated glass fiber cloth resin content was 20wt% ⁇ 40wt%.
- Step 4 Drying the organic solvent in the pre-dipped E-glass fabric to obtain a special pre-treated E-type fiberglass cloth.
- the method for pretreating the NE type fiberglass cloth is characterized in that:
- Step 1 Find or test the Dk (10 GHz) value of the NE type fiberglass cloth according to the selected E-type fiberglass cloth.
- Step 2 Prepare a pretreatment glue according to the Dk (10 GHz) value of the selected NE type fiberglass cloth, and select a resin composition with a Dk equal to the NE type fiberglass cloth Dk ⁇ 10%, preferably Dk is equal to the NE type. Glass fiber cloth Dk ⁇ 5% resin composition.
- Step 3 According to the mass per unit area of the pretreated fiberglass cloth, combined with the solid content of the pretreatment glue to adjust the process parameters such as the gap of the gluing machine clamping shaft and the speed of the gluing machine, when pretreating the glass fiber fabric mass per unit area of ⁇ 30g / m 2, the control pretreated glass fiber cloth resin content of 25wt% ⁇ 50wt%; when / m 2, pretreated glass fiber cloth mass per unit area of 30g / m 2 ⁇ 100g the control pretreatment of glass fiber cloth resin content of 20wt% ⁇ 45wt%; when the resin content of fiberglass cloth pretreated mass per unit area of 100g / m 2 ⁇ 175g / m 2, the glass fiber cloth is pretreated controls 20wt % ⁇ 40wt%.
- Step 4 Drying the organic solvent in the pre-dipped NE type fiberglass cloth to obtain a special pretreated NE type fiberglass cloth.
- a second aspect of the present invention provides a bonding sheet comprising a special pretreated fiberglass cloth as described above and a resin composition impregnated on a special pretreated fiberglass cloth.
- the resin composition comprises a resin, a curing agent, wherein the resin is selected from the group consisting of epoxy resins, cyanate resins, polyphenylene ether resins, polybutadiene resins, polybutadiene and styrene copolymer resins, Gather One or more of a tetrafluoroethylene resin, a polybenzoxazine resin, a polyimide, a silicone-containing resin, a bismaleimide resin, a liquid crystal polymer, and a bismaleimide triazine resin.
- the resin is selected from the group consisting of epoxy resins, cyanate resins, polyphenylene ether resins, polybutadiene resins, polybutadiene and styrene copolymer resins, Gather One or more of a tetrafluoroethylene resin, a polybenzoxazine resin, a polyimide, a silicone-containing resin, a bismaleimide resin, a liquid crystal polymer
- the resin composition may further comprise a filler, a thermoplastic resin, different flame retardant compounds or additives, etc., which may be used singly or in combination of plural kinds as needed.
- a third aspect of the invention provides a circuit substrate comprising the bonding sheet of the second aspect of the invention.
- the manufacturing method of the circuit substrate may include the following steps: Step 1: Preparing a pretreatment glue. According to the Dk of the fiberglass cloth used, a pretreatment glue is prepared, so that the Dk of the dry glue after the pretreatment glue is dried can be the same as or close to the Dk of the fiberglass cloth used.
- Step 2 Prepare a pretreated glass cloth.
- the glass fiber cloth is pre-impregnated with the above pretreatment glue, and then the solvent is dried to obtain a pretreated glass fiber cloth.
- Step 3 Prepare the bonding sheet.
- the special pretreated glass cloth is subjected to main dipping, and then the solvent is dried to obtain a bonded sheet.
- Step 4 Laminating one or more of the above-mentioned bonding sheets together, and laminating a metal foil on each side of the laminated bonding sheets.
- the laminated laminate is placed in a press for hot pressing to obtain the circuit substrate, the curing temperature is 100 ° C to 400 ° C, the curing time is lh 4 h, and the curing pressure is 10 Kgf / cm 2 ⁇ 65 Kgf / cm 2 .
- the present invention has the following beneficial effects:
- the circuit substrate of the present invention has a characteristic that the dielectric constant is small in the warp and weft directions, and the signal delay problem can be solved in the high frequency field;
- the circuit board of the present invention uses the adhesive sheet of the main dipping, and does not break when the substrate is pressed, and the interlayer adhesion is greatly improved;
- the circuit board of the present invention uses the adhesive sheet of the dipped rubber, and the production process is exactly the same as that of the conventional copper clad laminate, and no equipment modification and adjustment are required;
- the circuit board of the present invention has the advantage of low cost compared to the use of the open fiber cloth, and the circuit substrate It has the advantage that the dielectric constant has a smaller difference in the warp and weft directions, and it can solve the signal delay problem in the high frequency field;
- the dielectric constant (Dk), dielectric loss (Df), signal delay and the like are measured, and the following examples are further described and described in detail, wherein the mass fraction of the organic resin is organically solid.
- the mass of the substance is organically solid.
- E-type 1080 fiberglass cloth (mass area 46.8 g/m 2 ) as reinforcing material, epoxy resin composition dissolved in solvent and then add filler as pre-treatment glue, glue composition and circuit board physical property data sheet As shown in Table 1.
- the steps for making the circuit board are as follows:
- Step 1 Prepare a pretreatment gel. Taking a suitable container, adding 40 parts by mass of the epoxy resin composition, adding an appropriate amount of methyl ethyl ketone solvent, stirring for a certain period of time, and then adding 52 parts by mass of the rutile-type titanium dioxide filler and 8 parts by mass of the amorphous silica filler. Stir well and emulsify and disperse to form a pre-treatment glue.
- the glue Dk is 6.6.
- Step 2 Prepare a pretreated E-type fiberglass cloth.
- the E-type fiberglass cloth was pre-impregnated with the above pretreatment glue, and the solvent was dried after completion to obtain a pretreated glass fiber cloth having a resin content of 45 wt%.
- Step 3 Prepare a bonding sheet.
- the pretreated E-type fiberglass cloth was subjected to main dipping using a conventional epoxy resin system glue having a Dk of 3.8, and the solvent was dried after completion to obtain a bonding sheet.
- Step 4 Laminating one or more of the above-mentioned bonding sheets together, and forming a copper foil on each side of the laminated bonding sheets.
- the laminated laminate was placed in a press for hot pressing to obtain the circuit substrate, and the curing temperature was 190 ° C, the curing time was 2 h, and the curing pressure was 35 Kgf/cm 2 .
- Example 2
- E-type 1080 fiberglass cloth (mass area 46.8 g/m 2 ) as reinforcing material, epoxy resin composition dissolved in solvent and then add filler as pre-treatment glue, glue composition and circuit board physical property data sheet As shown in Table 1.
- the steps for making the circuit board are as follows:
- Step 1 Prepare a pretreatment gel. Taking a suitable container, adding 42 parts by mass of the epoxy resin composition, adding an appropriate amount of methyl ethyl ketone solvent, stirring for a certain period of time, and then adding 50 parts by mass of the rutile-type titanium dioxide filler and 8 parts by mass of the amorphous silica filler, Stir well and emulsify and disperse to form a pre-treatment glue with a Dk of 6.5.
- Step 2 Prepare a pretreated E-type fiberglass cloth.
- the E-type fiberglass cloth was pre-impregnated with the above pretreatment glue, and the solvent was dried after completion to obtain a pretreated glass fiber cloth having a resin content of 45 wt%.
- Step 3 Prepare a bonding sheet.
- the pretreated E-type fiberglass cloth was subjected to main dipping using a conventional polyphenylene ether resin composition glue having a Dk of 2.6, and the solvent was dried after completion to obtain a bonded sheet.
- Step 4 Laminating one or more of the above-mentioned bonding sheets together, and laminating a copper foil on each side of the laminated bonding sheets.
- the laminated laminate was placed in a press for hot pressing to obtain the circuit substrate, and the curing temperature was 200 ° C, the curing time was 2 h, and the curing pressure was 35 Kgf/cm 2 .
- E-type 1080 fiberglass cloth (mass area: 46.8 g/m 2 ) is used as the reinforcing material, the cyanate resin composition is dissolved in the solvent and the filler is added as the pretreatment glue, the composition of the glue solution and the physical property data of the circuit substrate.
- the table is shown in Table 1. The steps for making the circuit board are as follows:
- Step 1 Prepare a pretreatment gel. Taking a suitable container, adding 40 parts by mass of the cyanate resin composition, an appropriate amount of methyl ethyl ketone solvent, stirring for a certain period of time, and then adding 54 parts by mass of the rutile-type titanium dioxide filler and 6 parts by mass of the amorphous silica filler. The mixture was thoroughly stirred and emulsified and dispersed to form a pretreatment glue, and the glue Dk was 6.5.
- Step 2 Prepare a pretreated E-type fiberglass cloth. The E-type fiberglass cloth was pre-impregnated with the above pretreatment glue, and the solvent was dried after completion to obtain a pretreated glass fiber cloth having a resin content of 45 wt%.
- Step 3 Prepare a bonding sheet.
- the pretreated E-type fiberglass cloth was subjected to main dipping using a conventional polyphenylene ether resin composition glue having a Dk of 2.6, and the solvent was dried after completion to obtain a bonded sheet.
- Step 4 Laminating one or more of the above-mentioned bonding sheets together, and laminating a copper foil on each side of the laminated bonding sheets.
- the laminated laminate was placed in a press for hot pressing to obtain the circuit substrate, and the curing temperature was 200 ° C, the curing time was 2 h, and the curing pressure was 35 Kgf/cm 2 .
- Step 1 Prepare the pre-treatment glue. Taking a suitable container, adding 38 parts by mass of the polyphenylene ether resin composition, an appropriate amount of xylene solvent, stirring for a certain period of time, and then adding 54 parts by mass of the rutile-type titanium dioxide filler and 8 parts by mass of the amorphous silica filler. The mixture was thoroughly stirred and emulsified and dispersed to form a pretreatment glue, and the glue Dk was 6.4.
- Step 2 Prepare a pretreated E-type fiberglass cloth.
- the E-type fiberglass cloth was pre-impregnated with the above pretreatment glue, and the solvent was dried after completion to obtain a pretreated glass fiber cloth having a resin content of 30% by weight.
- Step 3 Prepare a bonding sheet.
- the pretreated E-type fiberglass cloth was subjected to main dipping using a conventional cyanate resin composition glue having a Dk of 3.2, and the solvent was dried after completion to obtain a bonded sheet.
- Step 4 Laminating one or more of the above-mentioned bonding sheets together, and laminating a copper foil on each side of the laminated bonding sheets.
- the laminated laminate was placed in a press for hot pressing to obtain the circuit substrate, and the curing temperature was 200 ° C, the curing time was 2 h, and the curing pressure was 35 Kgf / cm 2 .
- Example 5 Using E-type 1080 fiberglass cloth (mass area 46.8 g / m 2 ) as a reinforcing material, polybutadiene resin composition dissolved in solvent and then added filler as pre-treatment glue, glue composition and circuit board
- the physical property data table is shown in Table 1. The steps for making the circuit board are as follows:
- Step 1 Prepare a pretreatment gel. Taking a suitable container, adding 34 parts by mass of the polybutadiene resin composition, an appropriate amount of xylene solvent, stirring for a certain period of time, and then adding 56 parts by mass of the rutile-type titanium dioxide filler and 10 parts by mass of the amorphous silica filler. , thoroughly stirred, and emulsified and dispersed to form a pretreatment glue, the glue Dk is 6.2.
- Step 2 Prepare a pretreated E-type fiberglass cloth.
- the E-type fiberglass cloth was pre-impregnated with the above pretreatment glue, and the solvent was dried after completion to obtain a pretreated glass fiber cloth having a resin content of 20% by weight.
- Step 3 Prepare a bonding sheet.
- the pretreated E-type fiberglass cloth was subjected to main dipping using a conventional polyphenylene ether resin composition glue having a Dk of 2.6, and the solvent was dried after completion to obtain a bonded sheet.
- Step 4 Laminating one or more of the above-mentioned bonding sheets together, and laminating a copper foil on each side of the laminated bonding sheets.
- the laminated laminate was placed in a press for hot pressing to obtain the circuit substrate, and the curing temperature was 240 ° C, the curing time was 3 h, and the curing pressure was 55 Kgf/cm 2 .
- an E-type 1500 glass cloth (having a mass per unit area of 164.1 g/m 2 ) was used, and the resin content of the pretreated glass cloth was 25 wt%. The rest is the same as in the fifth embodiment.
- Step 1 Prepare a pretreatment gel. Take a suitable container, add 50 parts by mass of the epoxy resin jM composition, and mix the appropriate amount of methyl ethyl ketone solvent for a certain period of time, and then add 42 parts by mass of rutile type II. The titanium oxide filler and 8 parts by mass of the amorphous silica filler were thoroughly stirred, and emulsified and dispersed to form a pretreatment glue, and the glue Dk was 4.6.
- Step 2 Prepare a pretreated E-type fiberglass cloth.
- the NE type fiberglass cloth was pre-impregnated with the above pretreatment glue, and the solvent was dried after completion to obtain a pretreated glass fiber cloth having a resin content of 20% by weight.
- Step 3 Prepare a bonding sheet.
- the pretreated NE type fiberglass cloth was subjected to main dipping using a conventional cyanate resin composition glue having a Dk of 3.2, and the solvent was dried after completion to obtain a bonded sheet.
- Step 4 Laminating one or more of the above-mentioned bonding sheets together, and laminating a copper foil on each side of the laminated bonding sheets.
- the laminated laminate was placed in a press for hot pressing to obtain the circuit substrate, and the curing temperature was 200 ° C, the curing time was 2 h, and the curing pressure was 35 Kgf/cm 2 .
- NE type 2116 glass fiber cloth (mass area: 103.8g/m 2 ) is used as the reinforcing material, the cyanate resin composition is dissolved in the solvent and the filler is added as the pretreatment glue, the composition of the glue solution and the physical property data of the circuit board.
- the table is shown in Table 1. The steps for making the circuit board are as follows:
- Step 1 Prepare a pretreatment gel. Taking a suitable container, adding 50 parts by mass of a cyanate ester T composition, an appropriate amount of methyl ethyl ketone solvent, stirring for a certain period of time, and then adding 44 parts by mass of rutile-type titanium dioxide filler and 6 parts by mass of amorphous silica The filler, fully stirred, and emulsified and dispersed to form a pretreatment glue, the glue Dk is 4.4.
- Step 2' Prepare a special pretreatment NE type fiberglass cloth.
- the NE type fiberglass cloth was pre-impregnated with the above pretreatment glue, and the solvent was dried after completion to obtain a pretreated glass fiber cloth having a resin content of 30% by weight.
- Step 3 Prepare a bonding sheet.
- the pretreated NE type fiberglass cloth was subjected to main dipping using a conventional cyanate resin composition glue having a Dk of 3.2, and the solvent was dried after completion to obtain a bonded sheet.
- Step 4 Laminating one or more of the above-mentioned bonding sheets together, and laminating a copper foil on each side of the laminated bonding sheets.
- the laminated laminate is placed in a press for hot pressing to obtain the circuit substrate, and the curing temperature is The curing time was 2 h at 200 ° C and the curing pressure was 35 Kgf/cm 2 .
- Example 9
- NE type 1078 fiberglass cloth (mass area: 47.8g/m 2 ) is used as the reinforcing material, the polyphenylene ether resin composition is dissolved in the solvent and the filler is added as the pretreatment glue, the composition of the glue solution and the physical property data of the circuit substrate.
- the table is shown in Table 1. The steps for making the circuit board are as follows:
- Step 1 Prepare a pretreatment gel. Taking a suitable container, adding 48 parts by mass of the polyphenylene ether resin composition, an appropriate amount of xylene solvent, stirring for a certain period of time, and then adding 44 parts by mass of the rutile-type titanium dioxide filler and 8 parts by mass of the amorphous silica filler. Stir well and emulsifie and disperse to form a pre-treatment glue with a Dk of 4.5.
- Step 2 Prepare a pretreated NE type fiberglass cloth.
- the NE type fiberglass cloth was pre-impregnated with the above pretreatment glue, and the solvent was dried after completion to obtain a pretreated glass fiber cloth having a resin content of 45 wt%.
- Step 3 Prepare a bonding sheet.
- the pretreated NE type fiberglass cloth was subjected to main dipping using a conventional polyphenylene ether resin composition glue having a Dk of 2.6, and the solvent was dried after completion to obtain a bonded sheet.
- Step 4 Laminating one or more of the above-mentioned bonding sheets together, and laminating a copper foil on each side of the laminated bonding sheets.
- the laminated laminate was placed in a press for hot pressing to obtain the circuit substrate, and the curing temperature was 200 ° C, the curing time was 2 h, and the curing pressure was 35 Kgf / cm 2 .
- NE type 106 fiberglass cloth (mass area: 24.4g/m 2 ) is used as the reinforcing material, the polybutadiene resin composition is dissolved in the solvent and the filler is added as the pretreatment glue, the composition of the glue solution and the physical properties of the circuit substrate.
- the data table is shown in Table 1. The steps for making the circuit board are as follows:
- Step 1 Prepare a pretreatment gel. Taking a suitable container, adding 44 parts by mass of the polybutadiene resin composition, an appropriate amount of xylene solvent, stirring for a certain period of time, and then adding 46 parts by mass of the rutile-type titanium dioxide filler and 10 parts by mass of the amorphous silica filler. , stir well, and carry out the milk
- the dispersion is a pretreatment glue with a Dk of 4.5.
- Step 2 Prepare a pretreated NE type fiberglass cloth.
- the NE type fiberglass cloth was pre-impregnated with the above pretreatment glue, and the solvent was dried after completion to obtain a pretreated glass fiber cloth having a resin content of 50% by weight.
- Step 3 Prepare a bonding sheet.
- the main dipping was carried out by using the above-mentioned special pretreatment NE type fiberglass cloth, and the main dipping was carried out using a conventional polyphenylene ether resin composition glue having a glue Dk of 2.6, and the solvent was dried after completion to obtain a bonding sheet.
- Step 4 Laminating one or more of the above-mentioned bonding sheets together, and laminating a copper foil on each side of the laminated bonding sheets.
- the laminated laminate was placed in a press for hot pressing to obtain the circuit substrate, and the curing temperature was 240 ⁇ , the curing time was 3 hours, and the curing pressure was 55 Kgf/cm 2 .
- E-type 2116 glass fiber cloth (mass area: 103.3 ⁇ 4/m 2 ) is used as a reinforcing material, cyanate resin composition is dissolved in solvent and filler is added as pretreatment glue, glue composition and circuit board.
- the physical property data table is shown in Table 2. The steps for making the circuit board are as follows:
- Step 1 Prepare a pretreatment gel. Taking a suitable container, adding 40 parts by mass of the cyanate resin composition, an appropriate amount of methyl ethyl ketone solvent, stirring for a certain period of time, and then adding 54 parts by mass of the rutile-type titanium dioxide filler and 6 parts by mass of the amorphous silica filler. The mixture was thoroughly stirred and emulsified and dispersed to form a pretreatment glue, and the glue Dk was 6.5.
- Step 2 Prepare a pretreated E-type fiberglass cloth.
- the E-type fiberglass cloth was pre-impregnated with the above glue, and the solvent was dried to obtain a pretreated glass cloth having a resin content of 35 wt%/. .
- Step 3 Prepare a bonding sheet.
- the pretreated E-type fiberglass cloth was subjected to main dipping using a conventional cyanate resin composition glue having a Dk of 3.2, and the solvent was dried after completion to obtain a bonded sheet.
- Step 4 Laminating one or more of the above-mentioned bonding sheets together, and laminating a copper foil on each side of the laminated bonding sheets.
- the laminated laminate was placed in a press for hot pressing to obtain the circuit substrate, and the curing temperature was 200, the curing time was 2 h, and the curing pressure was 35 Kgf/cm 2 .
- the E-type 1080 glass cloth (having a mass per unit area of 46.8 g/m 2 ) was used as the reinforcing material, and the prepared pretreated glass cloth had a resin content of 10% by weight, and the rest was identical to that of Example 1.
- E-type 1080 fiberglass cloth (mass area: 46.8 g/m 2 ) is used as the reinforcing material, the cyanate resin composition is dissolved in the solvent and the filler is added as the pretreatment glue, the composition of the glue solution and the physical property data of the circuit substrate.
- the table is shown in Table 2. The steps for making the circuit board are as follows:
- Step 1 Prepare a pretreatment gel. Taking a suitable container, adding 70 parts by mass of a cyanate ester T composition, an appropriate amount of methyl ethyl ketone solvent, stirring for a certain period of time, and then adding 24 parts by mass of rutile-type titanium dioxide filler and 6 parts by mass of amorphous silica fillers, sufficiently stirred. ⁇ J and Serve pretreatment of dispersion glue, glue Dk 5.2.
- Step 2 Prepare a pretreated E-type fiberglass cloth. The E-type fiberglass cloth was pre-impregnated with the above pretreatment glue, and the solvent was dried after completion to obtain a pretreated glass fiber cloth having a resin content of 45 wt%.
- Step 3 Prepare a bonding sheet.
- the pretreated E-type fiberglass cloth was subjected to main dipping using a conventional polyphenylene ether resin composition glue having a Dk of 2.6, and the solvent was dried after completion to obtain a bonded sheet.
- Step 4 Laminating one or more of the above-mentioned bonding sheets together, and laminating a copper foil on each side of the laminated bonding sheets.
- the laminated laminate was placed in a press for hot pressing to obtain the circuit substrate, and the curing temperature was 200 ° C, the curing time was 2 h, and the curing pressure was 35 Kgf/cm 2 .
- Step 1 Prepare a pretreatment gel. Taking a suitable container, adding 22 parts by mass of the polyphenylene ether resin composition, an appropriate amount of xylene solvent, stirring for a certain period of time, and then adding 70 parts by mass of the rutile-type titanium dioxide filler and 8 parts by mass of the amorphous silica filler. The mixture was thoroughly stirred and emulsified and dispersed to form a pretreatment glue, and the glue Dk was 7.8.
- Step 2 Prepare a pretreated E-type fiberglass cloth.
- the E-type fiberglass cloth was pre-impregnated with the above pretreatment glue, and the solvent was dried after completion to obtain a pretreated glass fiber cloth having a resin content of 30% by weight.
- Step 3 Prepare a bonding sheet. Using the main dipping, the above-mentioned pretreated E-type fiberglass cloth was subjected to main dipping using a conventional cyanate resin composition glue having a Dk of 3.2, and the solvent was dried after completion to obtain a bonded sheet.
- Step 4 Laminating one or more of the above-mentioned bonding sheets together, and laminating a copper foil on each side of the laminated bonding sheets.
- the laminated laminate was placed in a press for hot pressing to obtain the circuit substrate, and the curing temperature was 200 ° C, the curing time was 2 h, and the curing pressure was 35 Kgf/cm 2 . Comparative example 4
- the prepared pretreated glass cloth had a resin content of 60% by weight, and the rest was identical to that of Example 5.
- the prepared pretreated glass cloth had a resin content of 15% by weight, and the rest was identical to that of Example 7.
- the prepared pretreated glass cloth had a resin content of 62% by weight, and the remainder was identical to that of Example 10.
- E type 2116 fiberglass cloth (mass area: 103.8g/m 2 ) is used as the reinforcing material, the cyanate resin composition is dissolved in the solvent and the filler is added as the pretreatment glue, the composition of the glue solution and the physical property data of the circuit substrate.
- the table is shown in Table 2. The steps for making the circuit board are as follows:
- Step 1 Preparation of a conventional resin composition glue. Take a suitable container, add 90 parts by mass of a cyanate resin composition, an appropriate amount of methyl ethyl ketone solvent, stir for a certain period of time, and then add 10 parts by mass of amorphous silica filler, and stir well to obtain a conventional cyanic acid.
- the ester resin composition glue, the glue Dk was 3.2.
- Step 2 Prepare a pretreated E-type fiberglass cloth.
- the E-type fiberglass cloth was pre-impregnated with the above glue, and the solvent was dried to obtain a pretreated glass cloth having a resin content of 35 wt%.
- Step 3 Prepare a bonding sheet.
- the pretreated E-type fiberglass cloth was subjected to main dipping using the above conventional cyanate resin composition glue having a Dk of 3.2, and the solvent was dried after completion to obtain a bonded sheet.
- Step 4 Laminating one or more of the above-mentioned bonding sheets together, and laminating a copper foil on each side of the laminated bonding sheets.
- the laminated laminate is placed in a press for hot pressing to obtain the circuit substrate, and the curing temperature is The curing time was 2 h at 200 ° C and the curing pressure was 35 Kgf/cm 2 .
- E-type 1080 fiberglass cloth (mass area: 46.8 g/m 2 ) is used as the reinforcing material, the epoxy resin composition is dissolved in the solvent and the filler is added as the glue for dipping the E-type fiberglass cloth, and the glue solution is formulated.
- the physical property data sheets of the composition and the circuit board are shown in Table 2. The steps for making the circuit board are as follows:
- Step 1 Prepare the glue. Take a suitable container, add 85 parts by mass of epoxy resin composition, an appropriate amount of methyl ethyl ketone solvent, stir for a certain period of time, and then add 15 parts by mass of amorphous silica filler, and stir well to obtain epoxy resin combination.
- the glue solution, the glue Dk is 3.8.
- Step 2 Prepare a bonding sheet.
- the E-type fiberglass cloth was dipped using the above-mentioned resin composition glue having a Dk of 3.8, and the solvent was dried after completion to obtain a bonded sheet.
- Step 3 Laminating one or more of the above-mentioned bonding sheets together, and laminating a copper foil on each side of the laminated bonding sheets.
- the laminated laminate was placed in a press for hot pressing to obtain the circuit substrate, and the curing temperature was 190 ° C, the curing time was 2 h, and the curing pressure was 35 Kgf/cm 2 .
- Step 1 Prepare a glue solution. Take a suitable container, add 85 parts by mass of epoxy resin composition, an appropriate amount of methyl ethyl ketone solvent, stir for a certain period of time, and then add 15 parts by mass of amorphous silica filler, and stir well to obtain epoxy resin combination.
- the glue solution, the glue Dk is 3.8.
- Step 2 Prepare a bonding sheet.
- the epoxy resin composition was glued to the opened fiberglass cloth with the above glue Dk of 3.8, and the solvent was dried after completion to obtain a bonded sheet.
- Step 3 Laminating one or more of the above-mentioned bonding sheets together, and superimposing on both sides of the laminated bonding sheets A piece of copper foil.
- the laminated laminate is placed in a press for hot pressing to obtain the circuit substrate, and the curing temperature is
- the curing time was 2 h at 190 ° C and the curing pressure was 35 Kgf/cm 2 .
- Dielectric properties Dk/Df The dielectric constant Dk and dielectric loss Df of the sheet at 10 GHz are measured by SPDR method;
- the measurement is performed according to the method specified in IPC TM-650 2.5.5.11.
- the test frequency is 12.5 GHz and the test line length is 40 inches.
- the signal delay of the test is divided into a warp signal delay and a latitudinal signal delay, and the warp signal delay refers to a signal when the transmission line is tested in the warp direction of the circuit substrate.
- Delay, latitudinal signal delay refers to the signal delay tested when the transmission line is routed in the latitudinal direction of the circuit board;
- Comparative Example 7 Compared with Example 11, although the method of pretreating and main dipping the fiberglass cloth was also adopted, the same glue was used for the pretreatment and the main dipping, and the pretreatment glue Dk and the fiberglass cloth were used. The Dk difference is large, and the circuit substrate has a signal delay problem. Comparative Example 8 is a common production method of a circuit board. The dk of the glue Dk and the fiberglass cloth are largely different by one dipping, and the circuit board has a signal delay problem as compared with the first embodiment.
- Comparative Example 9 the dipping of the fiberglass cloth was used for one dipping, and the Dk of the glue Dk and the fiberglass cloth of the fiberglass cloth were greatly different. Compared with the first embodiment, the circuit substrate still had a signal delay problem, especially the warp direction signal. The delay problem is serious.
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US14/647,412 US20160007452A1 (en) | 2014-01-14 | 2014-02-19 | Circuit substrate and process for preparing the same |
EP14863038.7A EP2913354B1 (en) | 2014-01-14 | 2014-02-19 | Circuit substrate and preparation method thereof |
KR1020157017087A KR101819805B1 (ko) | 2014-01-14 | 2014-02-19 | 회로기판 및 그 제조 방법 |
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EP3342925A4 (en) * | 2015-08-28 | 2019-04-24 | Shengyi Technology Co., Ltd. | CIRCUIT SUBSTRATE AND METHOD FOR PREPARING THE SAME |
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- 2014-02-19 EP EP14863038.7A patent/EP2913354B1/en active Active
- 2014-02-19 KR KR1020157017087A patent/KR101819805B1/ko active IP Right Grant
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US11191158B2 (en) | 2015-08-28 | 2021-11-30 | Shengyi Technology Co., Ltd. | Circuit board and process for preparing the same |
Also Published As
Publication number | Publication date |
---|---|
EP2913354B1 (en) | 2020-10-21 |
TWI625997B (zh) | 2018-06-01 |
KR101819805B1 (ko) | 2018-01-17 |
TW201528900A (zh) | 2015-07-16 |
US20160007452A1 (en) | 2016-01-07 |
EP2913354A1 (en) | 2015-09-02 |
KR20150100701A (ko) | 2015-09-02 |
CN103755989B (zh) | 2017-01-11 |
CN103755989A (zh) | 2014-04-30 |
EP2913354A4 (en) | 2017-01-25 |
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