Glass cloth, prepreg and printed wiring board

By surface-treating the glass cloth and extracting methanol to remove residues, the dielectric loss tangent of the glass cloth is reduced, solving the problem of high dielectric loss tangent in existing technologies and achieving the low dielectric loss requirement for printed wiring boards used in high-speed communication.

CN117098890BActive Publication Date: 2026-05-26ASAHI KASEI KOGYO KABUSHIKI KAISHA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ASAHI KASEI KOGYO KABUSHIKI KAISHA
Filing Date
2021-10-11
Publication Date
2026-05-26

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Abstract

A glass cloth is provided, which is a glass cloth woven from glass filaments containing multiple glass filaments as warp and weft yarns. The surface of the glass cloth is treated with a surface treatment agent, and the total carbon extraction amount when extracting the glass cloth with methanol is greater than 0 and less than 0.25%.
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