CN113500831B - High-speed copper-clad plate for server - Google Patents

High-speed copper-clad plate for server Download PDF

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Publication number
CN113500831B
CN113500831B CN202110732454.8A CN202110732454A CN113500831B CN 113500831 B CN113500831 B CN 113500831B CN 202110732454 A CN202110732454 A CN 202110732454A CN 113500831 B CN113500831 B CN 113500831B
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clad plate
copper
server
speed
prepreg
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CN113500831A (en
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彭代信
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Suzhou Yiketai Electronic Material Co ltd
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Suzhou Yiketai Electronic Material Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/14—Layered products comprising a layer of metal next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/08—Impregnating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/16—Drying; Softening; Cleaning
    • B32B38/164—Drying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • 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
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/24—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs
    • 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
    • H05K1/02—Details
    • H05K1/03—Use of materials for the substrate
    • H05K1/05—Insulated conductive substrates, e.g. insulated metal substrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—Fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/046—Synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/726—Permeability to liquids, absorption
    • B32B2307/7265—Non-permeable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/08—PCBs, i.e. printed circuit boards
    • 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
    • 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
    • C08J2479/00—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 C08J2461/00 - C08J2477/00
    • C08J2479/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
    • C08J2479/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/38—Boron-containing compounds
    • C08K2003/382—Boron-containing compounds and nitrogen
    • C08K2003/385—Binary compounds of nitrogen with boron
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C08K3/36—Silica
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

Abstract

The invention relates to a high-speed copper-clad plate for a server, which is prepared by dissolving polyphenyl ether into a solvent, adding a filler and a bridging agent under stirring, then adding a flame retardant, allyl modified bismaleimide resin and a catalyst, and stirring to obtain a resin liquid; impregnating a reinforcing material with a resin solution to obtain a prepreg; heating the prepreg to obtain a prepreg; and laminating a plurality of prepregs, respectively pressing one copper foil up and down, and hot-pressing to obtain the high-speed copper-clad plate for the server. The product of the invention has excellent electrical energy (loss factor) and extremely low water absorption, and is a substrate suitable for high-frequency and high-speed application.

Description

High-speed copper-clad plate for server
Technical Field
The invention relates to a composite material substrate which can be used for preparing materials in the field of high-frequency and high-speed communication, in particular to a high-speed copper-clad plate for a server.
Background
In recent years, because antennas, base stations and satellite communications require fast and undistorted signal transmission at high frequencies, and particularly the signal transmission capability under high frequency and high temperature and high humidity conditions is consistent with that in a normal state, new requirements are placed on substrates for high frequency applications.
The prior art discloses precursors for low dielectric constant materials, comprising: (a) a varnish composition; 5-30 parts by weight of (b) composite micropowder of polytetrafluoroethylene and polysiloxane; and 0.05 to 3 parts by weight of (c) a surfactant, wherein (a) the varnish composition comprises: (a1) 100 parts by weight of a polyphenylene ether resin, 20 to 30 parts by weight of triallyl isocyanurate, and 0.01 to 0.03 parts by weight of an initiator; (a2) 100 parts by weight of a polyphenylene ether resin, 20 to 30 parts by weight of a rubber, 20 to 30 parts by weight of triallyl isocyanurate, and 0.01 to 0.03 parts by weight of an initiator; or (a 3) 100 parts by weight of a copolymer of polyamideimide and bismaleimide. The prior art discloses an allylation hyperbranched polyphenyl ether modified bismaleimide resin and a preparation method thereof. 100 parts of bismaleimide and 30-85 parts of diallyl phenyl compound are stirred to be transparent at 110-140 ℃ according to mol; then adding 1-55 parts of allylated hyperbranched polyphenyl ether, reacting for 20-100 minutes at 110-140 ℃, and cooling to obtain the allylated hyperbranched polyphenyl ether modified bismaleimide resin. Although the polyphenylene oxide system has good dielectric properties, as a copper-clad plate, the peel strength needs to be further improved.
Disclosure of Invention
The invention aims to solve the technical problems of providing a high-speed copper-clad plate for a server, which has low loss factor, no obvious drift under high-frequency and high-temperature high-humidity conditions, good heat resistance, high peel strength, low water absorption and excellent flame retardance, and is suitable for the application of antennas, base stations and the like requiring high frequency.
The invention adopts the following technical scheme:
the preparation method of the high-speed copper-clad plate for the server comprises the following steps of;
(1) Dissolving polyphenyl ether into a solvent, adding a filler and a bridging agent under stirring, then adding a flame retardant, allyl modified bismaleimide resin and a catalyst, and stirring to obtain a resin liquid;
(2) Impregnating a reinforcing material with a resin solution to obtain a prepreg;
(3) Heating the prepreg to obtain a prepreg;
(4) And laminating a plurality of prepregs, respectively pressing one copper foil up and down, and hot-pressing to obtain the high-speed copper-clad plate for the server.
The invention also discloses a preparation method of the high-speed copper-clad plate for the server, which comprises the following steps of;
(1) Dissolving polyphenyl ether into a solvent, adding a filler and a bridging agent under stirring, then adding a flame retardant, allyl modified bismaleimide resin and a catalyst, and stirring to obtain a resin liquid;
(2) Impregnating a reinforcing material with a resin solution to obtain a prepreg;
(3) Heating the prepreg to obtain a prepreg;
(4) And laminating a plurality of prepregs, respectively pressing one copper foil up and down, and hot-pressing to obtain the high-speed copper-clad plate for the server.
In the invention, the filler comprises one or more than one of silicon dioxide, titanium dioxide, barium titanate, boron nitride, aluminum oxide and glass fiber; preferably, the filler is silica and boron nitride; further preferably, the filler is subjected to anaerobic ball milling treatment, specifically, silicon dioxide and boron nitride with the weight ratio of 1:0.1-0.15 are added into a ball mill, and ball milling is carried out for 2-3 hours under nitrogen, so as to obtain the filler; preferably, during ball milling, the rotational speed of the ball milling is 500-600 rpm, and the number ratio of the large grinding balls to the small grinding balls is 4:6; the ball-material ratio is 10:1; preferably, ethanol is added during ball milling.
In the invention, the reinforcing material is fiber glass cloth.
In the invention, the catalyst comprises one or more of dicumyl peroxide, tert-butyl peroxybenzoate and 2, 5-di (2-ethylhexanoyl peroxy) -2, 5-dimethylhexane.
In the invention, the mass ratio of polyphenyl ether, filler, bridging agent, flame retardant, allyl modified bismaleimide resin and catalyst is 100:120-180:80-110:30-60:40-60:1-2; the solid content of the resin liquid is 35-55%.
In the invention, the particle size of the silicon dioxide is 2-5 microns, and the particle size of the boron nitride is 1-6 microns, which are calculated by D50.
In the invention, the flame retardant is a bromine-containing or phosphorus-containing flame retardant.
In the invention, the heating temperature is 160-180 ℃ and the heating time is 1-5 minutes.
In the invention, the hot pressing temperature is 180-250 ℃, the time is 120-200 minutes, and the pressure is 25kg/cm 2 ～70kg/cm 2 。
In the invention, the bridging agent is triallyl isocyanurate (TAIC), the compatibility of polyphenyl ether and bismaleimide is poor, and the conventional coupling agent can not be well solved.
The invention has the following advantages:
according to the invention, polyphenyl ether, filler, bridging agent, flame retardant, allyl modified bismaleimide resin and catalyst are taken as raw materials, and are mixed in a solvent to obtain a glue solution, so that a high-speed copper-clad plate for a server can be prepared without other materials; the invention has simple process and abundant raw materials, and can meet the requirement of mass production, and the prepared modified bismaleimide resin/polyphenyl ether system has outstanding heat resistance, moisture resistance and better dielectric properties (low dielectric constant and dielectric loss); the invention improves the characteristics of glue solution solubility, glue solution storage period, prepreg appearance, substrate appearance, copper foil tension, glass transition temperature and the like.
The resin adopted in the thermosetting electronic composite material is not epoxy resin, but adopts a low-dielectric double-bond polymer material and a heat-resistant bismaleimide, and simultaneously the resin is matched with a filler technology to prepare the low-loss factor substrate, and the low-loss factor substrate has excellent heat resistance, water resistance, flame retardance, stripping and other performances.
Detailed Description
The raw materials of the invention are all commercial products, and the creative aim is to provide a new formula, especially to combine with filler ball milling, so as to solve the problems of poor stripping force and poor moisture resistance of the existing polyphenyl ether copper-clad plate. The particle size of the silicon dioxide is 2-5 microns, and the particle size of the boron nitride is 1-6 microns, which are calculated by D50. The specific operation method and the testing method of the invention are both conventional technologies.
Example 1
Adding silicon dioxide and boron nitride in a weight ratio of 1:0.12 into a planetary ball mill, simultaneously adding ethanol with the total weight of 15% of the total weight of the silicon dioxide and the boron nitride, ball milling for 2 hours at 600rpm under nitrogen, and separating the ball materials to obtain a filler; during ball milling, the number ratio of the large grinding balls to the small grinding balls is 4:6, the ball diameter of the large grinding balls is 5mm, and the ball diameter of the small grinding balls is 2mm; the ball-material ratio is 10:1.
BDM (4, 4 '-bismaleimide diphenylmethane) and DBA (2, 2' -allyl bisphenol A) are stirred at the constant temperature of 170 ℃ according to the mass ratio of 1:0.86 to obtain a clear and transparent resin prepolymer, and the resin prepolymer is poured out and naturally cooled to obtain the allyl modified bismaleimide resin.
100 parts by weight of polyphenyl ether (SA 9000) is dissolved in 300 parts by weight of toluene, 150 parts by weight of filler and 100 parts by weight of TAIC are added under conventional stirring, 50 parts by weight of flame retardant SAYTEX8010, 50 parts by weight of allyl modified bismaleimide resin and 1.5 parts by weight of dicumyl peroxide (DCP) are added after conventional stirring for 10 minutes, resin liquid is obtained through stirring, the solid content is regulated to be 50% by toluene, 80 parts by weight of 1080 fiber glass cloth (Shanghai Honghe) is used for soaking the resin liquid to obtain prepreg, and then the prepreg is obtained through baking at 170 ℃ for 3 minutes, so that the resin content is 65%; laminating 8 prepregs, respectively pressing 1 ounce copper foil on two sides of each prepreg, and preparing a high-speed copper clad plate for a server after high-temperature hot-pressing and curing in a press; the hot pressing temperature is 200 ℃, the time is 100 minutes, and the pressure is 60kg/cm 2 Then heating to 220 ℃ and pressing for 60 minutes, wherein the pressure is 70kg/cm 2 。
On the basis of example 1, a one-factor change was performed to obtain the following examples and comparative examples; physical property data of examples and comparative examples are shown in table 1.
Example 2
The weight ratio of the silicon dioxide to the boron nitride is 1:0.15, and the rest is unchanged, so that the high-speed copper-clad plate for the server is obtained.
Example 3
And (3) ball milling at 600rpm for 3 hours, and ball milling at 500rpm for 3 hours, wherein the rest is unchanged, so that the high-speed copper-clad plate for the server is obtained.
Example 4
The allyl modified bismaleimide resin is replaced by 60 parts by weight, and the rest is unchanged, so that the high-speed copper-clad plate for the server is obtained.
Example 5
The filling amount is changed to 180 parts by weight, and the rest is unchanged, so that the high-speed copper-clad plate for the server is obtained.
Comparative example 1
Mixing silicon dioxide and boron nitride with the weight ratio of 1:0.12 as a filler, omitting ball milling, and obtaining the copper-clad plate with the rest unchanged.
Comparative example 2
Ball milling is carried out under air, and the rest is unchanged, so that the copper-clad plate is obtained.
Comparative example 3
During ball milling, the number ratio of the large grinding ball to the medium grinding ball to the small grinding ball is 3:5:2, the ball diameter of the large grinding ball is 5mm, the ball diameter of the medium grinding ball is 2mm, the ball diameter of the small grinding ball is 0.5mm, and the rest is unchanged, so that the copper-clad plate is obtained.
Comparative example 4
And replacing the bridging agent with 5 parts by weight of KH560 and the rest of the bridging agent to obtain the copper-clad plate.
Comparative example 5
And omitting boron nitride, and obtaining the copper-clad plate with the rest unchanged.
All the raw materials are commercial products, the performance test method of the obtained product is a conventional method, the dielectric performance is tested according to the IPC-TM-650 method and the dielectric performance is tested according to the IPC TM-650.2.5.5 method; the moisture absorption was measured according to IPC TM-650 2.6.2.1 method, examples were all less than 0.15%; peel strength was measured according to IPC TM-650.4.8 method, flame retardance was measured according to UL94 test, PIM (2600 MHz) was measured using PIM tester.
Figure 299389DEST_PATH_IMAGE001
Dielectric loss refers to the phenomenon that the dielectric medium is converted into heat energy in an alternating electric field due to the fact that part of electric energy is consumed, so that the dielectric medium is heated, and the dielectric loss is one of important indexes of a high-speed copper-clad plate, and low dielectric loss can improve the running speed and reduce crosstalk; the dielectric properties of polymers depend on the orientation and relaxation process of the dipoles under the action of an external electric field, which is accompanied by the movement of the polymer molecular chains. Thus, dielectric properties are closely related to the internal interactions between the crosslinked network structure and the organic/inorganic phases. The boron nitride is omitted on the basis of the embodiment 1, the rest is unchanged, the obtained copper-clad plate is not applicable to high speed, and the PIM is-148; according to the invention, polyphenyl ether, filler, bridging agent, flame retardant, allyl modified bismaleimide resin and catalyst are taken as raw materials, and are mixed in a solvent to obtain a glue solution, so that a high-speed copper-clad plate for a server can be prepared without other materials; as described in the physical property analysis, compared with the general composite material, the high-speed copper-clad plate for the server has more excellent PIM and loss factor, has good high-frequency and high-speed performance, and completely meets the requirements of the future 5G market.

Claims (5)

1. The high-speed copper-clad plate for the server is characterized by comprising the following steps of;
(1) Adding silicon dioxide and boron nitride with the weight ratio of 1:0.1-0.15 into a ball mill, and ball milling for 2-3 hours under nitrogen to obtain a filler; dissolving polyphenyl ether into a solvent, adding a filler and a bridging agent TAIC under stirring, then adding a flame retardant, allyl modified bismaleimide resin and a catalyst, and stirring to obtain a resin liquid; during ball milling, the number ratio of large grinding balls with the ball diameter of 5mm to small grinding balls with the ball diameter of 2mm is 4:6; the mass ratio of polyphenyl ether to filler to bridging agent to flame retardant to allyl modified bismaleimide resin to catalyst is 100:120-180:80-110:30-60:40-60:1-2;
(2) Impregnating a reinforcing material with a resin solution to obtain a prepreg;
(3) Heating the prepreg to obtain a prepreg; the heating temperature is 160-180 ℃ and the heating time is 1-5 minutes;
(4) Laminating a plurality of prepregs, respectively pressing one copper foil up and down, and hot-pressing to obtain a high-speed copper-clad plate for the server; the hot pressing temperature is 180-250 ℃, the time is 120-200 minutes, and the pressure is 25kg/cm 2 ～70kg/cm 2 。
2. The high-speed copper-clad plate for a server according to claim 1, wherein: the reinforcing material is fiber glass cloth.
3. The high-speed copper-clad plate for a server according to claim 1, wherein: the catalyst comprises one or more of dicumyl peroxide, tert-butyl peroxybenzoate and 2, 5-di (2-ethylhexanoyl peroxy) -2, 5-dimethylhexane.
4. The high-speed copper-clad plate for a server according to claim 1, wherein: the flame retardant is a bromine-containing or phosphorus-containing flame retardant.
5. The use of the high-speed copper-clad plate for a server according to claim 1 in the preparation of a high-frequency high-speed circuit board.
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