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US 9,596,755 B2Granted
Magneto-dielectric substrate, circuit material, and assembly having the same
AssigneeRogers Corporation
InventorsMurali Sethumadhavan, Allen F. Horn, III, Karl Edward Sprentall, Michael White
Life of this patent
Estimating the term…
Abstract
In an embodiment, a magneto-dielectric substrate comprises a dielectric polymer matrix; and a plurality of hexaferrite particles dispersed in the polymer matrix in an amount and of a type effective to provide a magneto-dielectric substrate having a magnetic constant of greater than or equal to 2.5 from 0 to 500 MHz, or 3 to 8 from 0 to 500 MHz; a magnetic loss of less than or equal to 0.1 from 0 to 500 MHz, or 0.001 to 0.05 over 0 to 500 MHz; and a dielectric constant of 1.5 to 8 or 2.5 to 8 from 0 to 500 MHz.
Claims19
A magneto-dielectric substrate, comprising:
- a thermoset polymer matrix comprising a polybutadiene, a polyisoprene, a polyimide, or a combination comprising at least one of the foregoing;
- and
- a plurality of hexaferrite particles dispersed in the polymer matrix in an amount and of a type effective to provide the magneto-dielectric substrate having
- a magnetic constant of greater than or equal to 2.5 from 0 to 500 MHz, or 3 to 8 from 0 to 500 MHz,
- a magnetic loss of less than or equal to 0.1 from 0 to 500 MHz, or 0.001 to 0.05 over 0 to 500 MHz
- a dielectric constant of 1.5 to 8 or 2.5 to 8 from 0 to 500 MHz;
- a ratio of the dielectric constant to the magnetic constant of 1 to 2;
- and
- a peel strength to copper of 3 to 7 pli measured in accordance with IPC test method 650, 2.4.9.
6 more elements
Dependencies are inferred from the claim text.