Norbornene dicarboximide polymer dielectric devices

Details Norbornene dicarboximide polymer dielectric devices Norbornene dicarboximide polymer dielectric devices

1990-12-19

1992-05-26

Griffin, Donald

Electricity: electrical systems and devices

Electrostatic capacitors

Fixed capacitor

526 92, H01G 408, C08G 6900

Patent

active

051173271

ABSTRACT:
Electrical devices, e.g. molded circuit boards, connectors and capacitors, fabricated from electrical insulating component, comprising norbornene dicarboximide thermoplastic polymer exhibiting a glass transition temperature greater than about 200.degree. C., moisture absorption after equilibrating in boiling water of less than about 3 weight percent and an electrical permittivity at 1000 hertz measured at 25.degree. C. and 50 percent relative humidity of less than 2.8. Preferred polymers comprise N-methyl norbornene dicarboximide, N-ethyl norbornene dicarboximide, N-propyl norbornene dicarboximide, N-butyl norbornene dicarboximide, N-trifluoroethyl norbornene dicarboximide, N-phenyl norbornene dicarboximide, N-trifluoromethylphenyl norbornene dicarboximide, N-cyclohexyl norbornene dicarboximide, N-cycloheptyl norbornene dicarboximide, N-cyclooctyl norbornene dicarboximide.

REFERENCES:
patent: 3959234 (1976-05-01), Kurosawa et al.
patent: 4945170 (1990-07-01), Kohli
patent: 4965330 (1990-10-01), Asrar
J. Asrar, "Norbornene Dicarboximide Polymers" (U.S. Ser. #07/196,992).
Gazit et al., "Low Dielectric Circuit Materials for High Speed Digital Systems".
Balde et al., "Low Dielectric Constant-The Substrate of the Future".

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