Abstract:
A circuit board 1 having a base material 10 and an electrode 11 formed on at least one main surface of the base material 10 includes an easy peeling portion 12 formed in at least one of an inner portion and a side portion of the electrode 11, with the adhesive strength between the electrode 11 and the easy peeling portion 12 being less than the adhesive strength between the electrode 11 and the base material 10. A circuit board that has high connection reliability and enables narrow pitch mounting thereby can be provided.
Abstract:
A hybrid structure of multi-layer substrates comprises a first multi-layer substrate and a second multi-layer substrate. The first multi-layer substrate stacks up first metal layers, first dielectric layers alternately and has VIAs. A border district of a first metal layer connects with a border district of the corresponding first dielectric layer. The border districts are separated from adjacent first metal layers and adjacent first dielectric layers. The second multi-layer substrate stacks up second metal layers and second dielectric layers alternately. A border district of a second metal layer connects with a border district of the corresponding second dielectric layer. The border districts are separated from adjacent second metal layers and adjacent second dielectric layers. The VIAs are located at the border districts of the first dielectric layers and each VIA has electric conductor therein to connect one first metal layer with one second metal layer.
Abstract:
A multichip module comprises a multilayer substrate circuit having conductive patterns on its surface(s) to which microelectronic device(s) are attached. A part of the substrate is flexible and bifurcated. Two rigid members are attached lengthwise, one on either side of the substrate, and the free ends of the bifurcation are reflexed respectively about these members and bonded to them. Electrodes are located on the bifurcations so that they will be exposed outwardly and/or downwardly after reflexing. The module may further be provided with protective heat spreading covers. The electrodes and rigid members may be configured to engage a mating socket or they may be solderable to a printed circuit board.
Abstract:
A multi-layer microwave corrugated printed circuit board is provided. In one embodiment, the invention relates to a method for interconnecting components of a corrugated printed circuit board, the components including a first flexible layer having a first signal line on a surface of the first flexible layer and a second flexible layer having a second signal line on a surface of the second flexible layer, the method including forming at least one first hole in the first flexible layer, forming a conductive pad on the second flexible layer, forming at least one second hole in a non-conductive adhesive layer, aligning the at least one second hole with the at least one first hole and the conductive pad, bonding the first flexible layer and the second flexible layer, with the non-conductive adhesive layer disposed there between, and filling the at least one first hole and the at least one second hole with a conductive paste to electrically couple the first signal line with the second signal line.
Abstract:
Described herein are processing techniques for fabrication of stretchable and/or flexible electronic devices using laser ablation patterning methods. The laser ablation patterning methods utilized herein allow for efficient manufacture of large area (e.g., up to 1 mm2 or greater or 1 m2 or greater) stretchable and/or flexible electronic devices, for example manufacturing methods permitting a reduced number of steps. The techniques described herein further provide for improved heterogeneous integration of components within an electronic device, for example components having improved alignment and/or relative positioning within an electronic device. Also described herein are flexible and/or stretchable electronic devices, such as interconnects, sensors and actuators.
Abstract:
An electrical and optical hybrid film having high resistance to bending. The electrical and optical hybrid film has an optical waveguide film and an electrical wiring film on the optical waveguide film. The electrical and optical hybrid film has, between its opposite ends, a separated section where the electrical wiring film and the optical waveguide film are not secured to each other. The optical waveguide film has, at the separated section, a slit extending in the longitudinal direction, and the slit penetrates the optical waveguide film.
Abstract:
Disclosed is a chip-on-film (COF) type semiconductor package and a device using the same. The COF type semiconductor package may include an insulation substrate including a top surface and bottom surface, a semiconductor device on the top surface of the insulation substrate, a heat dissipating component on the bottom surface of the insulation substrate, and at least one space between the bottom surface of the insulation substrate and a top surface of the heat dissipating component.
Abstract:
A flexible circuit comprises two flexible dielectric sheets having conductive patterns on their surface(s) to which microelectronic device(s) are attached. A bond layer joins the two sheets over a portion of their respective surface areas so that a remaining portion of their areas remain unbonded and a bifurcated structure is thereby formed. Electrical contacts are provided on the unbonded or bifurcated portions of the flexible sheets. The flex may be attached to a rigid frame and provided with protective heat spreading covers.
Abstract:
A multichip module comprises a flexible circuit having conductive patterns on its surface(s) to which microelectronic device(s) are attached. The flexible circuit is enclosed and supported by two rigid frames, which may further be provided with protective heat spreading covers. Contact pads on the rigid frame(s) may be configured to engage a mating socket or they may be solderable to a printed circuit board.
Abstract:
A wiring board has a substrate having a groove on its surface, a first wiring placed in the groove, a plurality of bonding members located at mutually separated positions and each of which bonds the first wiring and the substrate. A gap is located between the first wiring and the surface of the groove.