Minnesota Mining and Manufacturing Company

3m Innovative Properties Company

Robert S Reylek

James G Berg

Kenneth C Thompson

Rolf W Biernath

Gordon D Henson

Barry S Carpenter

Mark S Konings

Wing C Chow

The present invention relates to electronic assemblies which include an elastomeric member made of a cured, room-temperature curable polysiloxane composition. When the assemblies are used to electrically interconnect a first contacting site on a first electronic device to a second contacting site on a second electronic device, the stress-relaxation resistant properties of the elastomer enhance local contact force to maintain a reliable connection.

Electronic assemblies with elastomeric members made from cured, room temperature curable silicone compositions having improved stress relaxation resistance

A stubless optoelectronic device receptacle for connecting multifiber optical ribbon cables to optoelectronic semiconductor components is provided. The optoelectronic device receptacle consists of a receptacle alignment block portion contained in the receptacle body. The alignment block has a connector coupling surface for engaging the fiber optic ribbon connector. An optoelectronic semiconductor component is fixedly mounted to the connector coupling surface of the alignment block and a flexible circuit is then mounted to the electronic semiconductor component to provide power to the component. In the preferred embodiment, the alignment block contains mechanical features which perform precision alignment of the block to a connector attached to the fiber ribbon cable.

Stubless optoelectronic device receptacle

A conducting structure includes a dielectric matrix with a first surface and a second surface. At least one via extends from the first surface of the matrix to the second surface of the matrix. In the at least one via conductive members are formed which include conductive elements and an optional binder. The conductive elements have a maximum dimension of: (i) at least about 5% of a length of the via, and, (ii) at least about 10% of the width of the via. The size, shape and number of conductive elements in each via, as well as the composition of the binder, may be selected to provide a conductive element with a controlled electrical and/or thermal conductivity, and a controlled modulus, for a particular application.

Electrical and thermal conducting structure with resilient conducting

A separable electrical connector assembly includes at least one connector body having a planar array of conductive protrusions. The conductive protrusions can be metallurgically bonded or pressure engaged with conductive contact pads on a surface of a printed circuit substrate, such as a printed circuit board or a flex circuit. In addition, a variety of decoupling means can be incorporated to substantially decouple the metallurgical bonds or pressure engagements from stresses produced by use of the separable electrical connector assembly and differential thermal expansion between the connector body and the printed circuit substrate.

Separable electrical connector assembly having a planar array of

An intermeshable electrical connector comprises a flexible electrically conductive member having electrically conductive elements along an outer surface for forming electrical connections with a rigid member having electrically conductive elements along an outer surface, these elements being correspondingly configured to the elements on the flexible member. The rigid member may be intermeshed with the flexible member at a desired location in a releasable engagement, forming the electrical connections, while allowing for subsequent release and reconnection without stripping, damaging or penetrating the electrically conductive elements of the flexible member.

Elastomeric locking taper connector with randomly placeable intermeshing

Two electronic components having fine pitch arrays of terminals can be disconnectably interconnected by a multiple electrical connector that includes a pair of intermeshable members. Each of those members has an electrically insulative body with a structured surface including a plurality of tapered elements. Tapered sides of those elements fit flush against each other when the two members intermesh, and the members become strongly adhered to each other when the tangent of the half angle of said tapered sides is no greater than the coefficient of friction of the material of the contacting surfaces. Each of the members has a plurality of electrically conductive segments in position to make good electrical contact when the members intermesh.

Miniature multiple conductor electrical connector

An anisotropically conductive polymeric matrix comprising a polymeric layer having conductive members extending substantially through the thickness thereof, said conductive members comprising a coating of a conductive material, and a process for making same.

Anisotropically conductive polymeric matrix

Multiple-connector tape has a flexible backing carrying a pattern of longitudinally electrically conductive stripes, each having an overlying adhesive band, each edge of which precisely follows an edge of the underlying conductive stripe. The adhesive bands may contain silver particles having thicknesses exceeding that of the adhesive between particles so that the terminals of an electrical device can be electrically connected through the particles to the longitudinally conductive stripes when the tape is adhered by its adhesive to the device. Electrical connections can be made in the absence of such particles when the stripes are metal foil having embossings which protrude through the adhesive.

Method of making multiple-connector adhesive tape

Insulated sheet material useful for making bonded electrical connections, especially to sets of small side-by-side terminal pads. In one typical form, the sheet material is an elongated tape comprising an elongated insulating web; a plurality of narrow spaced parallel elongated electrically conductive stripes on the web; electrically conductive adhesive disposed over the stripes comprising a layer of adhesive material in which are dispersed a monolayer of rather thick electrically conductive particles; and a thin electrically insulating layer disposed over the conductive adhesive and which is nontacky or poorly tacky at room temperature, provides high electrical resistance throughout the layer to the conductive particles, softens to an adhesive and flowable condition upon heating to an elevated temperature, and upon cooling to room temperature assumes a firm and substantially nonflowable condition. Such a connector tape is readily handleable and free from conductive bonding at room temperature but when laid over a set of adjacent spaced terminal pads with the electrically conductive stripes in registry with the pads, and pressed and heated, the conductive particles penetrate through the insulating layer to make electrical connection to the pads.

Insulated connected sheet material

The adhesive layer of the novel transfer tape contains electrically and thermally conductive particles such as silver which are preferably spherical and are larger than the thickness of the adhesive between particles. When used to bond two rigid substrates together, pressure is applied to the substrates to flatten the particles to the thickness of the adhesive between particles, thus making good electrical and thermal connection between the substrates through each particle.

Growing community of inventors

Minneapolis, MN, United States of America

Robert S Reylek