Abstract:
A printed circuit board (100) and a method (302,304,306,308) for imbedding a battery (106) in the printed circuit board are disclosed. The method includes connecting (302) the battery to a first inner pad (116) and a second inner pad (118) on an inner core layer (104) and forming a first battery contact (122) between a first outer pad (108) and the first inner pad (116). The method also includes electrically isolating (306) the first battery contact (122) and forming a second battery contact (124) between a second outer pad (110) and the second inner pad (118).
Abstract:
A product of and method for laminating and interconnecting multiple layer printed circuit boards (14) includes at least two complementary substrates (10 and 12) each having a solder bump (30) formed from conductive material (28) applied to a desired component (22). A dam network (34) is formed about the bumps (30) to prevent undesired spreading of the conductive material (28). Bonding material (36) between the surfaces (38a and 38b) of the substrates (10 and 12) bonds the multiple layers. The bonding material (36) has apertures through which the solder bumps (30) are connected.
Abstract:
Circuit boards to which such high speed differential signal connectors are mounted are disclosed and they have a particular pattern of termination traces, commonly taking the form of plated vias extending through the circuit board. These vias are arranged in a triangular pattern and the ground reference plane of the circuit board is provided with voids, one void being associated and encompassing a pair of the differential signal vias of a single terminal triplet. This reduces the capacitance of the signal vias and thereby increases the impedance of the circuit board within the launch area to lessen impedance discontinuities in the connector-circuit board interface.
Abstract:
A pad area of a substrate (50) includes a conductive trace (52) formed on the substrate (50) having a first surface area, the first surface area being of a first solderability. A conductive pad (56) is formed on the first surface area of the conductive trace (52). The conductive pad (56) has a second surface area, the second surface area being of a second solderability. The second solderability is greater than the first solderability. Because of the different solderabilities, a solder bump (46) on the semiconductor die (40) can be reflowed and connected to the second surface area without using a soldermask (28) to contain the melted solder on the second surface area.
Abstract:
The connection housing comprises a base body (1) with lateral walls (2), which extend around the base body on the top and which enclose the component (6) to be inserted as well as inner contacts (8) that are arranged between the component and at least one lateral wall. Polymer protuberances (3) for forming outer contacts (4) are shaped onto the underside. The connection between the inner contacts (8) of the top and the outer contacts (4) of the underside is effected by micro-boreholes (11) that are located underneath the component (6) in the middle area of the base body (1). This results in the provision of a housing, which requires little space on a printed circuit board and which can be economically produced preferably while using laser structuring.
Abstract:
A circuit module (11) is provided with a plurality of dual capacity connector pads (13), each pad holding a miniature surface mount connector (15) and/or a connection pin (17). The preferred I-channel surface mount connector is sufficiently small that the module can be connected by either surface mount connector (15) or pin (17) to the same region of the circuit module.
Abstract:
A high-density wiring board having a high connection reliability and produced at low cost. The wiring board is characterized by comprising a board having an electrode and covered with an insulating layer in which a hole is made so as to expose the electrode, a wiring connected to the electrode and formed of a layer adhering to the insulating layer and made of Cr or Ti and a layer adhering to the Cr or Ti layer and made of Cu, a protective film covering the wiring and having therein a hole for soldering, and solder for external connection formed in the hole by diffusion-alloying the Cu layer and reaching the Cr or Ti layer for establishing connection.
Abstract:
An improved connector assembly (1) particularly useful for testing semiconductor devices of ball grid array ("BGA") structure (10) with a plurality of solder balls (11) formed on the surface thereof. The balls (11) are placed into contact with opposing conductive portions (3a) of the connector assembly. A heat generating member (7), such as a wire, is disposed proximate to the connector assembly conductive portions (3a) and may be selectively energized to generate heat to partially melt the solder balls (11). Reliable connections are effected in this manner.