3m Innovative Properties Company

Minnesota Mining and Manufacturing Company

Glen Connell

Craig S Chamberlain

Ranjith Divigalpitiya

William C Tait

George F Vesley

Chris A Minick

David Edward Livingstone

Patrick G Zimmerman

Pierre H LePere

Charlotte M Palmgren

David C Chambers

Susan C Noe

Agatona D Monteagudo

Tejmeen K Sandhu

Michael A Kropp

Eric G Larson

Dennis D Hansen

Richard Sabatier

David A Kanno

Patrice Jannic

Christophe Arnold

Provided are adhesive compositions comprising a mixture of a maleimide terminated polyimide resin, a thermoplastic resin compatible with the maleimide terminated polyimide resin, a thermally activated free radical curing agent, and electrically conductive particles and/or scrim. Various embodiments add a silane coupling agent and/or an ethylenically unsaturated compound with acid functionality. Methods of using the compositions also are provided.

Anisotropic conductive adhesives

An electronic assembly comprising a first electronic element, a second electronic element, and a durably flexible bond therebetween. The bond comprises an anisotropic conductive adhesive that includes elongated electrically conductive particles. The bond provides at least one electrical pathway between the first electronic element and the second electronic element through an elongated contact region. This bond is functionally maintained for at least about 200 flexes.

Durable electronic assembly with conductive adhesive

Provided is a dispenser for dispensing particles onto a surface comprising a hopper for receiving particles, wherein the hopper has an opening at its bottom, a screen having openings and located adjacent the opening of the hopper, wherein the screen openings are uniformly sized and spaced and are sufficiently large to let the largest particles pass through during dispensing yet sufficiently small to hold the particles back when the dispenser is not operating, and means, located outside of the hopper, for moving particles from the hopper through the screen, and onto the surface. Also provided is a method of making a web with embedded particles comprising the sequential steps of making the web receptive to the particles by heating, eliminating static charges present on the web, dispensing the particles onto the web, dispersing the particles to minimize particle clumping in the web, and embedding the dispensed particles in the web.

Method and apparatus for making particle-embedded webs

The present invention provides a microelectronic assembly wherein a semi-crystalline copolymer adhesive composition, preferably provided in the form of a film, is used to electrically interconnect a first circuit pattern on a first substrate to a second circuit pattern on a second substrate. The adhesive composition preferably includes a semi-crystalline copolymer comprising polyether and polyamide monomeric units, a tackifier, and conductive particles.

Electronic assembly with semi-crystalline copolymer adhesive

Composition comprising (a) susceptors having the capability of absorbing microwave energy, said susceptors comprising a particulate substrate substantially non-reflective of microwave energy and a coating capable of absorbing microwave energy, and (b) a matrix substantially non-reflective of microwave energy. Susceptors are typically particles having a thin-film coating thereon. The matrix typically comprises polymeric or ceramic materials that are stable at temperatures conventionally used in microwave cooking. The composition allows reuse of the susceptors, eliminates decline in heating rate, eliminates arcing, allows the heating rate to be controlled, allows overheating to be controlled, and allows formation of microwave heatable composite materials having very low metal content.

Microwave heatable composites

An electromagnetic radiation absorbing material comprises doubly layered core particles dispersed in a dielectric binder material. The first layer dissipates radiation; the second layer is an insulating material which helps prevent the particles from conductively contacting each other, and prevents degradation of the first layer. The absorber may be applied to an electrically conductive material, and an impedance matching material may be used.

Electromagnetic radiation absorbing material employing doubly layered

Composition comprising (a) susceptors having the capability of absorbing microwave energy, and (b) a matrix substantially non-reflective of microwave energy. The susceptors comprise a particulate substrate having a thin-film coating thereon. The particulate substrate is substantially non-reflective of microwave energy and the coating is capable of absorbing microwave energy. The matrix typically comprises polymeric or ceramic materials that are stable at temperatures conventionally used in microwave cooking. The composition allows reuse of the susceptors, eliminates decline in heating rate, eliminates arcing, allows the heating rate to be controlled, allows overheating to be controlled, and allows formation of microwave heatable composite materials having very low metal content.

Growing community of inventors

Pine Springs, MN, United States of America

Glen Connell