Abstract:
A plurality of electronic components having conductive connecting members are surface-mounted to a target surface of a circuit board by specifying terminal-forming areas that are each no greater than the corresponding one of the electronic components and each include at least one terminal part such that at least one of these terminal-forming areas includes a plurality of terminal parts directly and that each pair of the terminal parts within any one of the terminal-forming areas is closer to each other than any pair of the terminal parts in different ones of the terminal-forming areas. An anisotropic conductive layer is formed on this target surface so as to span these terminal-forming areas, and the plurality of electronic components are placed on this anisotropic conductive layer individually above the plurality of terminal-forming areas. As the layer is heated, these electronic components are pressed against the layer such that the conductive connecting members of the electronic components become attached to and electrically conductive with corresponding ones of the terminal parts on the circuit board. The anisotropic conductive layer remains electrically insulative elsewhere.
Abstract:
A connected construction of a high-frequency package and a wiring board have an excellent high-frequency transmission characteristic without degradation of the transmission characteristic of even high-frequency signals in a wide band ranging from 20 GHz to 80 GHz in the case of connecting a high-frequency package to a wiring board. A distance between conductive vias and conductive vias to connect grounds formed on both main surfaces of a high-frequency transmission line substrate constituting the high-frequency package, and a distance between conductive vias and conductive vias to connect grounds formed on both main surfaces of the wiring board on which the high-frequency package is mounted, are set in consideration of the dielectric constant of the high-frequency transmission line substrate and the dielectric constant of the wiring board in order to improve the high-frequency transmission characteristic between the high-frequency transmission line substrate and the wiring board.
Abstract:
Conductive material or particles of an anisotropic conductive compound or material sandwiched between at least two aligned conductive contacts are vibrated mechanically, magnetically, or both mechanically and magnetically while the anisotropic conductive compound is curing. The conductive material is subjected to a static, substantially homogeneous DC magnetic field (i) before, (ii) following or (iii) at least partially during the time the conductive material is being vibrated.
Abstract:
On a mounting surface of a multilayered component as a surface mounting component, an isolated electrode is arranged so as to be isolated from other terminal electrodes on the mounting surface. For solder applied to the isolated electrode, the application range can be securely limited to an area within the isolated electrode.
Abstract:
An anisotropic conductive compound is cured by exposing it to heat while in the presence of an AC magnetic field followed by a static, substantially homogeneous DC magnetic field.
Abstract:
A multichip assembly includes semiconductor devices or semiconductor device components with outer connectors on peripheral edges thereof. The outer connectors are formed by creating via holes along boundary lines between adjacent, unsevered semiconductor devices, or semiconductor device components, then plating or filling the holes with conductive material. When adjacent semiconductor devices or semiconductor device components are severed from one another, the conductive material in each via between the semiconductor devices is bisected. The semiconductor devices and components of the multichip assembly may have different sizes, as well as arrays of outer connectors with differing diameters and pitches. Either or both ends of each outer connector may be electrically connected to another aligned outer connector or contact area of another semiconductor device or component. Assembly in this manner provides a low-profile stacked assembly.
Abstract:
A multidie semiconductor device (MDSCD) package includes a generally planar interposer comprising a substrate with a central receptacle, upper surface conductors, and outer connectors on the lower surface of the interposer. Conductive vias connect upper surface conductors with outer connectors. One or more semiconductor devices may be mounted in the receptacle and one or more other semiconductor devices mounted above and/or below the interposer and attached thereto. The package may be configured to have a footprint not significantly larger than the footprint of the largest device and/or a thickness not significantly greater than the combined thickness of included devices. Methods for assembling and encapsulating packages from multidie wafers and multi-interposer sheets or strips are disclosed. Methods for combining a plurality of packages into a single stacked package are disclosed. The methods may include use of somewhat laterally extending intermediate conductive elements, flip-chip style electrical connection, or both within the same package.
Abstract:
A surface mount ceramic package, e.g. for a microwave or millimeter wave integrated circuit device, has outer conductive pads that are available for direct connection with traces on the printed circuit board. A metal core or base has spaces at one or more sides, e.g., voids or cutouts, where the outer pads are located. There is a first ceramic layer disposed on the core, with a central cavity for the die, and an upper or second ceramic layer. Printed traces are buried between the two layers, and vias connect the traces with the outer pads. Inner pads are located on a ledge of the first layer adjacent the cavity for connection with electrodes of the die. Each of the first and second ceramic layers may be stacked ceramic tape. The package may be LTCC or HTCC. This construction avoids inductive losses, especially at higher frequencies.
Abstract:
A surface mount ceramic package, e.g. for a microwave or millimeter wave integrated circuit device, has outer conductive pads that are available for direct connection with traces on the printed circuit board. A metal core or base has spaces at one or more sides, e.g., voids or cutouts, where the outer pads are located. There is a first ceramic layer disposed on the core, with a central cavity for the die, and an upper or second ceramic layer. Printed traces are buried between the two layers, and vias connect the traces with the outer pads. Inner pads are located on a ledge of the first layer adjacent the cavity for connection with electrodes of the die. Each of the first and second ceramic layers may be stacked ceramic tape. The package may be LTCC or HTCC. This construction avoids inductive losses, especially at higher frequencies.
Abstract:
An image pickup device provided with an optical system for taking the image of an object, a photoelectric converting element for photoelectric conversion of the object image taken by the optical system, an electric signal outputting board for outputting an electrical signal from the photoelectric converting element, and a position defining member for defining the position of the optical system relative to the photoelectric converting element, wherein the electric signal outputting board is positioned between the photoelectric converting element and the position defining member.