Printed circuit board substrate comprising a coated boron nitride
AssigneeRogers Corporation
InventorsEui Kyoon Kim, Bruce Fitts, Christopher Brown
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Abstract
In an embodiment, a printed circuit board substrate (12) comprises a polymer matrix; a reinforcing layer (42); and a plurality of coated boron nitride particles (44); wherein the plurality of coated boron nitride particles comprise a coating having an average coating thickness of 1 to 100 nanometers. The polymer matrix can comprise at least one of an epoxy, a polyphenylene ether, 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.
Claims21
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.
Dependencies are inferred from the claim text.