Provided is an inter-board connection structure including: a first connector provided to the first board; a second connector provided to the second board, the second connector electrically connecting between the first board and the second board; and a vibration suppressor provided on a side of a surface opposite to a first surface where the second connector is placed, the surface opposite to the first surface being referred to as a second surface, the vibration suppressor supporting the second board from the side of the second surface to suppress vibration generated between the first board and the second board.

Provided are methods of forming thermally conductive flexible bonds for use in electronic boards of unmanned spacecraft and other types of aircraft. Also provided are methods of preparing adhesive materials to form these bonds including methods of preparing treated filler particles. In some aspects, an adhesive material includes filler particles having organofunctional groups, such as boron nitride particles treated in silane. These particles may be combined with a urethane modified epoxy to form the adhesive material. The weight ratio of the particles in the adhesive material may be about 40-60%. The adhesive material may be thermally cured using a temperature of less than 110° C. to prevent damage to bonded electronic components. The cured adhesive may have a thermal conductivity of at least about 2 W/m K measured in vacuum and may have a glass transition temperature if less than −40° C.

Disclosed is a stretchable substrate including: a via configured to provide an electrical connection between one surface and the other surface of the stretchable substrate; and a buffer shell positioned between the via and the stretchable substrate and having a Young's modulus value that is greater than a Young's modulus value of the stretchable substrate and smaller than a Young's modulus value of the via.

A stretchable interconnect structure for electrically connecting electronic devices and a method of fabricating a stretchable interconnect structure for electrically connecting electronic devices. The method comprises the steps of providing an electrically conductive wire having a 3-dimensional helical form; and embedding the electrically conductive wire in a substrate made from an elastic material.

A wiring board includes: a substrate first elastic modulus including a first surface and second surface positioned on the opposite side of the first surface; wiring positioned on the first surface side of the substrate and connected to an electrode of an electronic component mounted on the wiring board; and a reinforcing member second elastic modulus greater than the first elastic modulus and including a first reinforcing part positioned on the first surface side of the substrate or on the second surface side of the substrate and partially overlaps the electronic component mounted on the wiring board when viewed along the normal direction of the first surface of the substrate. The wiring includes a section that does not overlap the reinforcing member when viewed along the normal direction of the first surface including pluralities of peaks and valleys aligned along a planar direction of the first surface of the substrate.

A semi-flex component carrier includes a stack having at least one electrically insulating layer structure and/or at least one electrically conductive layer structure. The stack defines at least one rigid portion and at least one semi-flexible portion. The at least one electrically insulating layer structure forms at least part of the semi-flexible portion and includes a material having an elongation of larger than 3% and a Young modulus of less than 5 GPa.

A semi-flex component carrier includes a stack with at least one electrically insulating layer structure and/or at least one electrically conductive layer structure. The stack defines at least one rigid portion and at least one semi-flexible portion, and a component embedded in the at least one rigid portion. The at least one electrically insulating layer structure of the stack has a mechanical buffer structure surrounding at least part of the component and has a lower value of the Young modulus than other electrically insulating material of the stack.

Disclosed are compositions, devices, systems and fabrication methods for stretchable composite materials and stretchable electronics devices. In some aspects, an elastic composite material for a stretchable electronics device includes a first material having a particular electrical, mechanical or optical property; and a multi-block copolymer configured to form a hyperelastic binder that creates contact between the first material and the multi-block copolymer, in which the elastic composite material is structured to stretch at least 500% in at least one direction of the material and to exhibit the particular electrical, mechanical or optical property imparted from the first material. In some aspects, the stretchable electronics device includes a stretchable battery, biofuel cell, sensor, supercapacitor or other device able to be mounted to skin, clothing or other surface of a user or object.

The present invention relates to flexible and stretchable UV and thermally curable dielectric ink compositions that can be thermo or vacuum formed. The flexible ink can form a stretchable dielectric coating having excellent adhesion. The dielectric ink compositions can be applied on a circuit board, such as a paper-phenolic resin board, plastic board (PMMA, PET or the like) or a glass-epoxy resin board, by screen printing or the like, followed by heat/UV curing. The compositions are suitable for use in applications such as a capacitive touch, in-mold forming, creating cross over insulation layers, and manufacturing electronic circuity and devices.

The disclosure provides a circuit board structure including at least two sub-circuit boards and at least one connector. Each of the sub-circuit boards includes a plurality of carrier units. The connector is connected between the sub-circuit boards, and a plurality of stress-relaxation gaps are defined between the sub-circuit boards.