Patent ID: 11895768
Assignee: ROGERS CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  C | IPC C  H

Claim 0:
1. A printed circuit board substrate comprising:
a polymer matrix, wherein the polymer matrix comprises at least one of an epoxy, a polyphenylene ether, a polystyrene, an ethylene-propylene dicyclopentadiene copolymer, a polybutadiene, a polyisoprene, a fluoropolymer, or a crosslinked matrix comprising at least one of triallyl cyanurate, triallyl isocyanurate, 1,2,4-trivinyl cyclohexane, trimethylolpropane triacrylate, or trimethylolpropane trimethacrylate;
a reinforcing layer; and
10 to 50 volume percent, based on the total volume of the printed circuit board substrate, of a plurality of coated boron nitride particles having an average particle size of 5 to 500 micrometers;
wherein the plurality of coated boron nitride particles comprises a coating comprising aluminum oxide, wherein the coating has an average coating thickness of 0.5 to 10 nanometers, wherein the plurality of coated boron nitride particles further comprises a surface treatment;
wherein the printed circuit board substrate has a peel strength of greater than or equl to 3 pli as determined in accordance with IPC-Tm-650-2,4,8; and
wherein the printed circuit board has a Z-direction thermal conductivity that is at least 90% that of an equivalent printed circuit board comprising boron nitride particles without the coating comprising aluminum oxide.