Abstract:
Single-sided conductor patterned films are prepared, each of which has a conductor pattern formed only one side of a resin film and via hole filled with conductive paste. A single-sided conductor patterned film which has a conductor pattern formed only one side of a resin film and an opening formed in the resin film so as to expose an electrode is laminated on the single-sided conductor patterned films. Moreover, a cover layer with an opening to expose an electrode is laminated on a bottom surface of the single-sided conductor patterned films to form a laminate. Then, by pressing while heating the laminate, a multilayer substrate having the electrodes at both sides thereof can be produced.
Abstract:
In a method of manufacturing a contact element, provision is made of a laminated body which has an insulating film, an electrically conductive layer stacked on the insulating film, and bump holes opened. A treatment is carried out so as to removen organic materials and the like from an interior of the bump holes and/or a surface of the insulating film before bumps are formed on the bump holes. The treatment may be a plasma treatment or an X-ray irradiation.
Abstract:
To provide a suspension board with circuit that enables its terminals to be bonded to the other terminals with sufficient strength with simple structure, to ensure sufficient bonding reliability, the suspension board with circuit 11 includes a suspension board 12, a base layer 13 formed on the suspension board 12, and a conductive layer 14 formed on the base layer 13 and a cover layer 18 with which the conductive layer 14 is covered, wherein external connection terminals 17 to be bonded to terminals 28 of a read/write board 29 are formed without the suspension board 12 and/or the base layer 13 being formed.
Abstract:
A temporary package for a semiconductor die is provided. The temporary package has an outline and external contact configuration that are the same as a conventional plastic or ceramic semiconductor package. The temporary package can be used for burn-in testing of the die using standard equipment. The die can then be removed from the package and certified as a known good die. The package includes a base, an interconnect and a force applying mechanism. The package base includes external contacts formed in a dense array, such as a land grid array (LGA), a pin grid array (PGA), a bumped grid array (BGA) or a perimeter array. The package base can be formed of ceramic or plastic with internal conductive lines using a ceramic lamination process, a 3-D molding process or a Cerdip formation process.
Abstract:
A metallic or an electrical trace having a terminus and a stress relief bend formed in the trace adjacent the terminus. The electrical trace may have a portion carried by a flexible substrate to form a flexible circuit. The stress relief bend may be free floating and extend from the flexible substrate or may be encapsulated by the flexible substrate. The electrical circuit and the flexible circuit each have a generally planar portion extending in the X and Y axis, with the stress relief bend projecting into the Z axis. This allows electrical traces to be spaced with a very narrow pitch because the stress relief bend does not consume any valuable real estate on the flexible circuit or the substrate to which the electrical trace is applied.
Abstract:
The present invention provides a low profile, high density electronic package for high speed, high performance semiconductors, such as memory devices. It includes a plurality of modules having high speed, impedance-controlled transmission line buses, short interconnections between modules and, optionally, driver line terminators built into one of the modules, for maintaining high electrical performance. Suitable applications include microprocessor data buses and memory buses such as RAMBUS and DDR. The modules may be formed on conventional printed circuit cards with unpacked or packed memory chips attached directly to the memory module. Thermal control structures may be included to maintain the high density modules within a reliable range of operating temperatures.
Abstract:
A printed circuit board for use in testing electrical components having distributed two-dimensional connection contacts. The printed circuit board has an electrically insulating insulation layer provided with through-holes. In the region of a respective through-hole, an electrically conductive contact pad is provided on a side surface of the insulation layer. Proceeding from a respective contact pad, a respective conductor track extends to an edge region of the insulation layer.
Abstract:
In an electronic-component mounting structure, an electronic component (2) has a surface. First electrodes (1) provided on the surface of the electronic component (2) are arranged in a first array. Second electrodes (3) provided on a base board (4) are arranged in a second array corresponding to the first array. The second electrodes (3) correspond to the first electrodes (1) respectively. Solder bumps (9) connect the first electrodes (1) and the second electrodes (3) respectively. The first electrodes (1) include first outermost electrodes (1b) located in an outer area of the first array. The second electrodes (3) include second outermost electrodes (3b, 3c) located in an outer area of the second array. The second outermost electrodes (3b, 3c) correspond to the first outermost electrodes (1b) respectively. An outer edge (X1, Z1) of each of the second outermost electrodes (3b, 3c) extends outward of an outer edge (Y1) of a corresponding first outermost electrode (1b) with respect to the first and second arrays. A distance between an outer edge (X1, Z1) of each of the second outermost electrodes (3b, 3c) and an outer edge (Y1) of a corresponding first outermost electrode (1b) is greater than a distance between an inner edge (X2, Z2) of the second outermost electrode (3b, 3c) and an inner edge (Y2) of the corresponding first outermost electrode (1b) with respect to the first and second arrays.
Abstract:
A carrier for testing an unpackaged semiconductor die is provided. The carrier includes a carrier base for supporting the die; an interconnect for establishing a temporary electrical connection with the die; and a force distribution mechanism for biasing the die and interconnect together. In an illustrative embodiment the carrier is formed with a laminated ceramic base. The ceramic base includes internal conductive lines that are wire bonded to the interconnect and metal plated external contacts that are connected to external test circuitry. In an alternate embodiment the carrier is formed with an injection molded plastic base and includes 3-D circuitry formed by a metallization and photolithographic process. In either case, the carrier is adapted for testing different die configurations by interchanging different interconnects.
Abstract:
In a stacked-type semiconductor unit having a plurality of semiconductor devices stacked on a base board including a base electrode, each semiconductor device has a wiring board including an external electrode provided in an end portion thereof. The semiconductor devices are stacked on the base board such that the external electrodes are aligned with one another. Then, the external electrodes are electrically connected to the base board by solder.