Abstract:
A semiconductor package includes: a first substrate; a second substrate disposed on the first substrate to be spaced apart from the first substrate, and including an active region on which semiconductor devices are configured to be mounted; and a flexible interconnection member electrically connecting the first substrate to the second substrate, the flexible interconnection member including a flexible film and a metal wiring member formed on the flexible film.
Abstract:
A method for making a leadframe includes removing a group of parallel, strip-shaped electrical conductors from a metal sheet, embedding end portions of the conductors in molding compound defining a leadframe body, and separating the conductors from each other, such that portions of the conductors remain encapsulated in the molding compound while other portions remain exterior to the molding compound and define leads of the resulting leadframe.
Abstract:
A flexible circuit comprises a folded dielectric sheet having conductive patterns on its surface(s) to which microelectronic device(s) are attached. The dielectric sheet is folded 180° about a selected axis and a bond layer joins the two halves 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. The folded flex design is particularly suitable for reel-to-reel manufacturing.
Abstract:
An electronic apparatus includes an outer cover member, an internal structure member, first and second external connection connectors, and first and second printed circuit boards. The first printed circuit board has a first surface on which the first external connector is mounted thereon, a signal pattern of the first external connector is formed on the first surface, and a second surface. The second printed circuit board has a first surface on which the second external connector is mounted thereon, a signal pattern of the second external connector is formed on the first surface, and a second surface. Ground patterns are formed on the second surfaces of the printed circuit boards. The first and second external connectors overlap and are arranged in a space surrounded by the outer cover member and the internal structure member so that the second surfaces of the first and second printed circuit boards face each other.
Abstract:
A printed circuit board includes a lower plate provided with an internal circuit wiring and having a recessed part at a surface thereof and a plurality of projection patterns at a lower surface of the recessed part; an upper plate having the same structure of the lower plate and adhered to the lower plate so that surfaces formed with the recessed part are opposite to each other; a heat circulation medium injected into an internal space formed by the recessed parts of the lower and upper plates.
Abstract:
A semiconductor chip module includes a first flip-chip unit and a second flip-chip unit. The first flip-chip unit has a first chip and a first glass circuit board. The first chip is connected with the first glass circuit board by flip-chip bonding. The second flip-chip unit has a second chip and a second glass circuit board. The second chip is connected with the second glass circuit board by flip-chip bonding. The first flip-chip unit and the second flip-chip unit are attached to each other. A method for manufacturing the semiconductor chip module is also disclosed.
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 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:
Provided is an FPC, which comprises an insulating layer 2, wiring layers 3 and 4 laminated above and under the insulating layer 2, and a layer connection for connecting the wiring layers 3 and 4 electrically. The layer connection is constituted to comprise: a conductor press-fit hole 5 of a cone shape extending through the insulating layer 2 and the upper and lower wiring layers 3 and 4 and expanded to the side of one wiring layer 3; and a conductor 6 filled and press-fitted without any clearance in the conductor press-fit hole such that it is jointed to the wiring upper layer 3 deformed into the cone shape of the conductor press-fit hole 5, and is protruded from the other wiring lower layer 4 to have its surface partially coated and jointed. As a result, the contact area between the wiring layers 3 and 4 and the conductor 6 filled in the conductor press-fit hole 5 can be enlarged to retain the contact strength between the wiring layers 3 and 4 and the conductor 6 sufficiently thereby to provide a high connection reliability for the layer connection.