3m Innovative Properties Company

Nanayakkara L D Somasiri

Andrew C Lottes

Paul V Huynh

Jimmie Rae Baran, Jr

Dipankar Ghosh

Nicholas A Stacey

Badri Veeraraghavan

Guoping Mao

Ge Jiang

Alfred Viehbeck

Kenton D Budd

Alphonsus V Pocius

William L Taylor

Levent Biyikli

John B Scheibner

Bradley L Givot

Carl E Fisher

Hany B Eitouni

An enhanced breakdown strength dielectric material includes a base dielectric layer having first and second opposing major surfaces. A first stress mitigating layer is disposed on the first major surface of the base dielectric layer. A second stress mitigating layer disposed on the second major surface of the base dielectric layer. A volume conductivity of at least one of the first and second stress mitigating layers is at least 2 times a volume conductivity of the base dielectric layer.

Dielectric material with enhanced breakdown strength

Provided is a composition comprising a polymeric material, a filler material dispersed in the polymeric material, the filler material comprising inorganic particles and a discontinuous arrangement of conductive material wherein at least a portion of the conductive material is in durable electrical contact with the inorganic particles, and conductive material dispersed in the polymeric material.

Method of making an electrical stress control device having a dielectric material with non-linear dielectric constant

Dielectric material with non-linear dielectric constant

Provided are compositions and materials that have varistor properties and are suitable for use in electrical stress control devices and surge arrestor devices. The compositions and materials include a polymeric material and calcined calcium copper titanate filler material and have a reversible non-linear current-voltage characteristic.

Compositions having non-linear current-voltage characteristics

A photoimageable, aqueous acid soluble polyimide polymer comprising an anhydride, including a substituted benzophenone nucleus, a diamine reacted with the anhydride to form a photosensitive polymer intermediate, and at least 60 Mole % of solubilizing amine reacted with the photosensitive polymer intermediate to form the photoimageable, aqueous acid soluble polyimide polymer. An emulsion for electrophoretic deposition of a coating of a photoimageable, aqueous acid soluble polyimide polymer comprises a dispersed phase, including the photoimageable aqueous acid soluble polyimide polymer, dissolved in an organic solvent and a dispersion phase including a coalescence promoter and water. The emulsion may be applied, by electrophoretic deposition, to a conductive structure to provide a photoimageable coating on the conductive structure. After exposing the coating to a pattern of radiation for photocrosslinking exposed parts of the photoimageable aqueous acid soluble polyimide polymer, an aqueous acid developer solution removes unexposed photoimageable aqueous acid soluble polyimide polymer to reveal a crosslinked polyimide polymer image of the radiation pattern.

Photoimageable, aqueous acid soluble polyimide polymers

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Austin, TX, United States of America

Nanayakkara L D Somasiri