Abstract:
PROBLEM TO BE SOLVED: To provide an optical semiconductor device using a CAN-type optical package which firmly connects a flexible substrate to the CAN-type optical package to maintain reliability as a product, while maintaining high-frequency signal reflection low at a connecting portion to obtain high-frequency characteristics. SOLUTION: High-frequency signal metal patterns are formed on the flexible substrate which is bent at almost right angles at ends of the signal metal patterns. The signal metal patterns are conductively fixed to signal lead pins attached to a stem to be virtually parallel with the signal lead pins. Some of the lead pins are inserted through-holes formed on the flexible substrate to be fixed conductively to some of the metal patterns on the flexible substrate. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a printed circuit board assembly capable of reconciling application to a circuit and a cost. SOLUTION: The printed circuit board assembly comprises a primary printed circuit board, and a secondary printed circuit board formed under the primary printed circuit board and in parallel with the primary printed circuit board. The primary printed circuit board has a primary conductive wire formed on its surface, and the primary conductive wire is used to electrically be connected with the other electrical element. The secondary printed circuit board has a secondary conductive wire formed on its surface used to establish electrical connection between electronic elements. The primary wire and the secondary conductive wire are electrically connected. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
An integrated-circuit attachment structure comprises an integrated circuit and a package assembly. The package assembly includes a package containing the integrated circuit. The package has pins at its corners and a grid at least primarily of solder balls on its bottom face.
Abstract:
A method for preparing an integrated circuit for connection to a surface, the integrated circuit including lead contacts and leadless contacts, is provided. The method includes providing the integrated circuit, applying a first solder paste to the leadless contacts, forming solder balls on the applied solder paste, heating the solder balls, thereby removing at least a portion of the first solder paste and bringing the solder balls into electrical contact with the leadless contacts, the base of the solder balls being generally aligned in a plane, and bending the lead contacts into gull wings, with the base of the gull wings being substantially coplanar with the plane. The base of the gull wings and the base of the at least one of the solder balls collectively generally define a contact plane for potential future contact with the surface.
Abstract:
An orthogonal backplane connector systems having midplane footprints that provide for continuity of impedance and signal integrity through the midplane and allow for the same connector to be coupled to either side of the midplane. This design creates an orthogonal interconnect without taking up unnecessary PCB real estate. The midplane circuit board may include a first differential signal pair of electrically conductive vias disposed in a first direction, and a second differential signal pair of electrically conductive vias disposed in a second direction that is generally orthogonal to the first direction.
Abstract:
A package carrier (100) for increasing the circuit density on printed circuit boards (503). The package carrier (100) mounts on a printed circuit board (503) on top of a first integrated circuit package (507) that is also mounted on the printed circuit board (503). The carrier (100) has an upper major surface (102U) having a pad array on which a second integrated circuit package (501) is mountable. The carrier (100) has a plurality of leads by means of which the carrier (100) is surface mounted to the printed circuit board (503). Each carrier lead is also electrically connected to a single pad of the pad array on the upper surface (102U). The integrated circuit package (507) beneath the carrier (100) shares all or most printed circuit board (503) connections in common with the carrier (100) and consequently the integrated ciurcut package (501) mounted upon the carrier (100). The carrier (100) also includes heat sink or heat disipation structures.
Abstract:
An integrated circuit assembly (30) is disclosed herein. The assembly includes a dielectric substrate (32) defining a predetermined array of electrically conductive traces (40) and an array of solder balls (42) electrically connected to the traces (40). An integrated circuit chip (44) having a series of input/output pads is supported on the substrate (36). In one embodiment, a plurality of leadframe leads (48) are supported by the substrate (36) in electrical isolation from and over the conductive traces (40). First and second series of bonding wires (56, 58) electrically connect certain ones of the input/output pads on the IC chip (44) to the leadframe leads (48) and conductive traces (40). In other embodiments, one or more electrically isolated conductive layers (142, 144) are supported by the dielectric substrate (122) over the traces (128) and leadframe leads (130). The integrated circuit assembly (120), in accordance with any of these embodiments, provides a very high density electrical interconnection arrangement for the IC chip (132) while retaining a small package footprint.