Ecole Polytechnique Federale De Lausanne

Ecole Polytechnique Féderale De Lausanne (epfl)

Stephanie P Lacour

Ivan Rusev Minev

Nicolas Vachicouras

Arthur Hirsch

Grégoire Courtine

Pavel Musienko

Florian Fallegger

Christina Myra Tringides

Benoit Huguet

Ludovic Serex

Hugues Vandeparre

Hadrien Michaud

Jennifer Macron

Iva Rusev Minev

Giuseppe Schiavone

Sukho Song

The present disclosure relates to how to engineer reversible elasticity in thin films and/or layers and/or substrates, using a repeated Y-shaped motif, which is cut out through the film and/or layer and/or substrate. As an example, using a 75 &#x3bc;m thick polyimide (PI) foil, macroscopic dog-bone shaped structures with a range of geometrical parameters of the Y shape have been prepared according to an embodiment of the present disclosure. The tensile strain response of the film at its point of fracture was then recorded. The structures were also confirmed using finite element modeling. Upon stretching, the PI ligaments locally deflect out of plane, allowing the foil to macroscopically stretch.

Engineering reversible elasticity in ductile or brittle thin films and products resulting from said engineering

A biomedical device having improved handling features to be easily inserted into a cavity or recess is disclosed, as well as methods for using thereof, said device comprising a flat and soft substrate, comprising electrically conductive tracks, configured to interface a biological surface; and a rigid member located on a portion of said flat and soft substrate, said member being substantially composed of a mechanically adaptive material being fully or partially degradable upon a degrading/softening trigger.

Biomedical device comprising a mechanically adaptive member

A method for manufacturing an electrical conductor includes: depositing a solid metal conductive layer or film on a substrate; depositing a liquid metal on the solid layer; and allowing the liquid metal and the solid layerto alloy by diffusion of the liquid metal into the solid layer or film so as to form a solid conductive layer or film of the alloy; as well as allowing the liquid metal to further infiltrate the alloy so as to form percolating paths and/or droplets of the liquid metal in the the solid conductive layer or film, thus forming a biphasic conductive layer.

Method for manufacturing electrical conductors, and electrical conductors manufactured according to same

A method produces a device adapted to be implanted into the human body for purposes such as neural stimulation, sensing or the like. The method includes: providing a stretchable layer or membrane of an insulating material; forming on the layer or membrane at least one stretchable conductive path; depositing at least one small bolus of a soft and conductive paste or material onto pre-defined areas or portions of the at least one conductive path, and inserting a first end portion of a conductive elementinto the at least one bolus of soft conductive paste or material. A second end portion of the conductive element opposite to the first end portion is not inserted into the at least one bolus.

Synthetic skin for recording and modulating physiological activities

A method produces a conductive paste comprising 15-20% by weight of PDMS and 80-85% by weight of metallic micro-nano particles, wherein the conductive paste is obtained by repeated addition of singular doses of PDMS to a heptane diluted PDMS low viscosity liquid containing the metallic micro-nano particles, wherein the heptane fraction is allowed to evaporate after addition of each of the singular doses of PDMS. A method forms a conductive path on a support layer, wherein the conductive path is encapsulated by an encapsulation layer comprising at least one via through which at least one portion of the conductive path is exposed, the method comprising filling the at least one via with the conductive paste.

Method for the electrical passivation of electrode arrays and/or conductive paths in general, and a method for producing stretchable electrode arrays and/or stretchable conductive paths in general

Stretchable electronic structure comprising one intrinsically fragile thin film integrated on or within a soft heterogeneous substrate. The invention also relates to a process for manufacturing such a structure.

Stretchable electronic structures formed of thin films integrated with soft heterogeneous substrate

Growing community of inventors

Daillens, Switzerland

Stephanie P Lacour