3m Innovative Properties Company

Michael S Graff

Bharat R Acharya

Derek J Dehn

Charles L Bruzzone

Rui Yang

Ronald David Jesme

Clinton P Waller, Jr

William J Kopecky

Satinder K Nayar

Kevin W Gotrik

Jeffrey M Florczak

Steven D Theiss

Guoping Mao

Brandon Alan Bartling

Seong-Woo Woo

Carlos A Barrios

Noah O Shanti

Nathan P Kreutter

Dennis M Brunner

Fabian Stolzenburg

Jennifer J Sokol

Sergei A Manuilov

Jeanne M Bruss

Paul T Hines

Clint J Novotny

David L Buster

Biplab K Roy

Steven L Johnson

Chuang Wei Chiu

Daniel K Luebbert

Xiaoming Kou

Clinton P Waller

A magnetic shielding film includes opposing first and second major surfaces and a plurality of particles dispersed therebetween, each particle having a magnetic permeability, a thickness H along a thickness direction of the particle, and a longest dimension L along a length direction of the particle orthogonal to the thickness direction, L/H greater than or equal to 2, the particles defining a plurality of voids therebetween, the length directions of at least 60% of the particles oriented within 5.5 degrees of a same orientation direction.

Orientation of magnetic fillers to optimize film properties

Method of making a polymer matrix composite comprising a porous polymeric network structure; and a plurality of particles distributed within the polymeric network structure, the method comprising: combining a thermoplastic polymer, a solvent that the thermoplastic polymer is soluble in, and a plurality of particles to provide a slurry; forming the slurry in to an article; heating the article in an environment to retain at least 90 percent by weight of the solvent, based on the weight of the solvent in the slurry, and inducing phase separation of the thermoplastic polymer from the solvent to provide the polymer matrix composite.

Method of making polymer matrix composites

A magnetic isolator includes a dielectric film having a layer of electrically-conductive soft magnetic material bonded thereto. The layer of electrically-conductive soft magnetic material comprises substantially coplanar electrically-conductive soft magnetic islands separated one from another by gaps. At least some of the electrically-conductive soft magnetic islands have an outer insulating oxidized layer that electrically insulates them from adjacent electrically-conductive soft magnetic islands. The gaps at least partially suppress electrical eddy current induced within the layer of soft magnetic material when in the presence of applied external magnetic field. An electronic device including the magnetic isolator and a method of making the magnetic isolator are also disclosed.

Magnetic isolator, method of making the same, and device containing the same

A multilayer magnetic sheet is described which comprises a plurality of stacked magnetic component layers separated by first electrically insulating layers. Each of the plurality of magnetic component layers comprises a plurality of isolated magnetic sublayers having a magnetic layer thickness of less than one micron. The multilayer magnetic sheet has a magnetic fraction between about 5% and about 80%; a total magnetic thickness of greater than or equal to 5 microns; and a relative composite permeability of greater than about 20.

Magnetic multilayer sheet

A magnetic isolator includes a dielectric film having a layer of electrically-conductive soft magnetic material bonded thereto. The layer of electrically-conductive soft magnetic material comprises substantially coplanar electrically-conductive soft magnetic islands separated one from another by a network of interconnected gaps. The interconnected gaps are at least partially filled with a thermoset dielectric material. The network of interconnected gaps at least partially suppresses electrical eddy current induced within the layer of soft magnetic material when in the presence of applied external magnetic field. An electronic device including the magnetic isolator and a method of making the magnetic isolator are also disclosed.

The present disclosure relates to polymer composites that include a thermoplastic polymer, network structure and a soft, ferromagnetic particulate material. The polymer composites may be used, for example, as magnetic flux field directional materials. The present invention also relates to methods of making the polymer composites, e.g. polymer composite sheets, of the present disclosure. In one embodiment, the present disclosure provides a polymer composite including a thermoplastic polymer, network structure; and a soft, ferromagnetic particulate material distributed within the thermoplastic polymer, network structure. The weight fraction of soft, ferromagnetic particulate material may be between 0.80 and 0.98, based on the total weight of the polymer composite and/or the thermoplastic polymer may have a number average molecular weight between 5&#xd7;10g/mol to 5&#xd7;10g/mol.

Thermoplastic polymer composite containing soft, ferromagnetic particulate material and methods of making thereof

Provided are partially etched dielectric films with raised conductive features. Also provided are methods for forming the raised conductive features in the dielectric films, which methods include partially etching the dielectric films.

Partially etched dielectric film with conductive features

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Woodbury, MN, United States of America

Michael S Graff