A process of manufacturing a multiple-layer printed circuit board includes selectively applying a dielectric resin to a region of a circuitized core layer. The process also includes partially curing the dielectric resin prior to performing a lamination cycle to form the multiple-layer printed circuit board that includes the circuitized core layer.

The present application relates to overmoulded printed electronic parts as well as to methods for preparing overmoulded printed electronic parts using conductive trace inks such as molecular inks, thermoset resins, and reinforcing materials such as glass microspheres and glass fabric.

A circuit board includes a substrate, a first dielectric layer, an adhesive layer, a second dielectric layer, and a conductive line. The first dielectric layer is disposed on the substrate. The adhesive layer is bonded to the first dielectric layer and has at least one through hole. The through hole has an inner wall. The second dielectric layer is disposed on the adhesive layer and has a second through hole communicated with the first through hole. The conductive line is located in the second through hole of the second dielectric layer and is in contact with the inner wall of the adhesive layer.

A process for thermoforming a circuit onto a three-dimensional part comprises applying electrically conductive lines on a substrate to form a flexible circuit. The flexible circuit is heated to a temperature sufficient to thermoform the substrate into a shape that conforms to said three-dimensional part and attached to the three-dimensional part.

The present invention presents a method of fabrication for a physiological sensor with electronic, electrochemical, and chemical components. The fabrication method comprises steps for manufacturing an apparatus comprising at least one electrochemical sensor, a microcontroller, and a transceiver. The fabrication process includes the steps of substrate fabrication, circuit fabrication, pick and place, reflow soldering, electrode fabrication, membrane fabrication, sealing and curing, layer bonding, and dressing. The physiological sensor is operable to analyze biological fluids such as sweat.

A method of making a printed circuit board and a printed circuit board including a plurality of plastic substrate parts having one or more first substrate parts each having at least one coupling means, and one or more second substrate parts each having at least one receiving means to receive the coupling mean. At least one of the plurality of plastic substrate parts is formed with a further structural element, and at least two of the plurality of plastic substrate parts are connected to each other through the at least one coupling means and the at least one receiving means. The connected substrate parts include a circuit.

The present invention relates to a method for manufacturing a multilayer thin FPCB, and the method for manufacturing a multilayer thin FPCB according to the present invention relates to a method for manufacturing an FPCB (Flexible Printed Circuit Board) comprising coating metal nanoparticles on a first flexible substrate of a thin film; applying a laser to the metal nanoparticles to sinter the metal nanoparticles and pattern them; cleaning the metal nanoparticles unsintered; laminating a second flexible substrate of a thin film on the first flexible substrate in which a pattern is formed; forming a via hole on the second flexible substrate using a laser; coating metal nanoparticles on the second flexible substrate; applying a laser to the metal nanoparticles to sinter the metal nanoparticles and pattern them; and cleaning the metal nanoparticles unsintered.

A method of forming a circuit board includes forming a conductive pattern on a substrate; forming a first negative resist on the substrate after formation of the conductive pattern; partially exposing the first negative resist on the surface of the conductive pattern to form a first via exposure portion; forming a second negative resist on the substrate after formation of the first via exposure portion; partially exposing the second negative resist on the first via exposure portion to form a second via exposure portion larger than the first via exposure portion; developing the first negative resist and the second negative resist after formation of the second via exposure portion to form a via opening reaching the conductive pattern; and filling the via opening with a conductive material.

Methods to systematize the development of machines using inexpensive, fast, and convenient fabrication processes are disclosed. In an embodiment, a folding pattern and corresponding circuit design can provide the blueprints for fabrication. The folding pattern may be provided (e.g. laser machined) on a flat sheet of substrate material, such as a polymer. The circuit pattern may be generated by etching or applying (e.g. sputtering) a copper foil layer onto the substrate. Circuit components and actuators may then be added at specified locations. The flat substrate may then be folded along the predefined locations to form the final machine. The machine may operate autonomously to perform a task.

A method of forming a circuit board includes forming a conductive pattern on a substrate; forming a first negative resist on the substrate after formation of the conductive pattern; partially exposing the first negative resist on the surface of the conductive pattern to form a first via exposure portion; forming a second negative resist on the substrate after formation of the first via exposure portion; partially exposing the second negative resist on the first via exposure portion to form a second via exposure portion larger than the first via exposure portion; developing the first negative resist and the second negative resist after formation of the second via exposure portion to form a via opening reaching the conductive pattern; and filling the via opening with a conductive material.