A method for preparing a nano high-frequency high-speed substrate

By crosslinking modified hexagonal boron nitride nanosheets and low dielectric constant glass fiber cloth, the problems of insufficient strength and high water absorption of aramid paper substrates were solved, realizing the preparation of high-strength, low-water-absorption nano high-frequency and high-speed substrates, thus improving product performance.

CN117484979BActive Publication Date: 2026-04-17GUANGDONG CHAOHUA TECH CO LTD
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Patent Information

Application Number
CN202311589274.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-11-27
Publication Date
2026-04-17
Estimated Expiration
2043-11-27

AI Technical Summary

Technical Problem

The aramid paper structure of existing nanopaper-based high-frequency and high-speed copper-clad laminates has low strength, is easily damaged, and has high water absorption, which leads to gaps or breaks during the preparation process, affecting product quality.

Method used

Modified hexagonal boron nitride nanosheets and low dielectric constant glass fiber cloth are used. Through the cross-linking effect of high-frequency and high-speed adhesives, combined with isocyanate coupling agents, the strength of the substrate is improved and the water absorption rate is reduced. Vacuum press is used for pressing and curing molding.

Benefits of technology

The substrate's Tg value, coefficient of thermal expansion, dielectric constant, and dielectric loss were improved, its peel strength and bending strength were enhanced, its moisture absorption rate was reduced, and its high-frequency and high-speed performance was ensured.

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Abstract

This invention discloses a method for preparing a nano high-frequency high-speed substrate; belonging to the field of copper clad laminate substrate preparation technology; its key technical points include the following steps: (1) Mixing: Weigh 50-60 parts of liquid crystal bismaleimide / diallyl diphenyl ether copolymer, 20-30 parts of organic solvent, 17.5-30 parts of modified hexagonal nano boron nitride sheet KH570-BNNSs suspension, 1-2 parts of flame retardant, 0.2-0.5 parts of curing agent and 0.5-1.0 parts of coupling agent and pass through a mixture at 1500 rpm. (1) High-frequency high-speed adhesive is obtained by high-speed stirring for 2-4 hours; (2) Adhesive application: the low dielectric constant glass fiber cloth is unwound, initially impregnated with the high-frequency high-speed adhesive, and then impregnated on one side before being mainly impregnated to remove the air in the low dielectric constant glass fiber cloth. Then, it is extruded and dried in sequence to obtain a semi-cured sheet; (3) Assembly; (4) Pressing; The present invention aims to provide a method for preparing a nano high-frequency high-speed substrate with a scientific preparation method, high substrate strength and low water absorption rate; used for the preparation of copper clad laminate substrates.
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