US 12,446,150 B2
Prepreg and uses of the same
Jui-Hsiang Tang, Zhubei (TW)
Assigned to TAIWAN UNION TECHNOLOGY CORPORATION, Zhubei (TW)
Filed by TAIWAN UNION TECHNOLOGY CORPORATION, Zhubei (TW)
Filed on Mar. 22, 2024, as Appl. No. 18/613,501.
Claims priority of application No. 112145577 (TW), filed on Nov. 24, 2023.
Prior Publication US 2025/0176100 A1, May 29, 2025
Int. Cl. B32B 27/20 (2006.01); H05K 1/03 (2006.01)
CPC H05K 1/036 (2013.01) [H05K 2201/015 (2013.01); H05K 2201/0209 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A prepreg, which comprises:
a first dielectric layer, which comprises a reinforcing material and a first dielectric material, wherein the first dielectric material comprises polytetrafluoroethylene, a first filler and a water-soluble thickening agent; and
second dielectric layers, formed respectively on both sides of the first dielectric layer and each comprise a second dielectric material, wherein the second dielectric material does not comprise a fluoropolymer,
wherein based on the total weight of the first dielectric material, the content of the first filler ranges from 1.5 wt % to 10.0 wt %.