Abstract:
Apparatus and methods for achieving a desired value of electrical impedance between parallel planar conductors of an electrical power distribution structure by electrically coupling multiple bypass capacitors and corresponding electrical resistance elements in series between the planar conductors. The methods include bypass capacitor selection criteria and electrical resistance determination criteria based upon simulation results. An exemplary electrical power distribution structure produced by one of the methods includes a pair of parallel planar conductors separated by a dielectric layer, n discrete electrical capacitors, and n electrical resistance elements, where n≧2. Each of the n discrete electrical resistance elements is coupled in series with a corresponding one of the n discrete electrical capacitors between the planar conductors. The n capacitors have substantially the same capacitance C, mounted resistance Rm, mounted inductance Lm, and mounted resonant frequency fm-res. The mounted resistance Rm of each of the n capacitors includes an electrical resistance of the corresponding electrical resistance element. The electrical power distribution structure achieves an electrical impedance Z at the resonant frequency fm-res of the capacitors. The mounted resistance Rm of each of the n capacitors is substantially equal to (n·Z). The mounted inductance Lm of each of discrete electrical capacitors, and n electrical resistance elements, where n≧2. Each of the n capacitors is less than or equal to (0.2·n·&mgr;0·h), where &mgr;0 is the permeability of free space, and h is a distance between the planar conductors.
Abstract:
A direct-connect signaling system including a printed circuit board and first and second integrated circuit packages disposed on the printed circuit board. A plurality of electric signal conductors extend between the first and second integrated circuit packages suspended above the printed circuit board.
Abstract:
A combination circuit board (12) and segmented bus structure (54) defines a composite circuit board/bus assembly (52) upon which an electrical circuit may be assembled. The various segments (54a-54f) of bus structure (54) may be variously configured to achieve one or more assembly, performance, testing, and/or reliability goals. For example, one bus segment configuration provides integral connector tabs (54a and 54e) for mechanical and/or electrical connection to interconnecting wires or electrical terminals of one or more external devices. Another bus segment configuration (54d) provides for mechanical and high current electrical interconnections between one or more bus segments (54a-54f) and one or more electrical components (16, 18, 20) and/or conductive film patterns(64) formed on top surface (12b) of the circuit board (12). Still another bus segment configuration provides integral tabs (54b and 54c) for electrical connection to and mechanical attachment of electrical components (16, 18, 20) from one or more of such tabs (54b and 54c) extending through the circuit board (12) to other such tabs (54b and 54c) or other circuit structures. Yet another bus structure (54f) provides for highly efficient heat sinking capability and/or electrical connection for electrical components (18) mounted either directly to one or more bus segments (54f) and for electrical components (18) mounted to a substrate (68) that is itself mounted directly to one or more bus segments (54f).
Abstract:
An apparatus for reducing an electrical noise inside a ball grid array package is disclosed. The apparatus mainly comprises a substrate, a plurality of solder balls and a plurality of inside-connected capacitors. The substrate includes a contact layer, a power plane and a ground plane. The plurality of solder balls are fixed on the contact layer. The plurality of inside-connected capacitors are fixed on the contact layer, and a conductive glue is used to electrically connect the capacitors to the power plane and ground plane to reduce the electrical noise between the power plane and ground plane.
Abstract:
Apparatus and methods of electrically connecting integrated circuits and transducers are described. In particular, a transducer includes a base mountable on a substrate (e.g., a printed circuit board), and an input/output (I/O) lead configured to contact an I/O lead of an integrated circuit mounted on the substrate. The transducer may be mounted on the substrate to contact the transducer I/O lead to the integrated circuit I/O lead. The transducer I/O lead is configured to electrically connect to the integrated circuit I/O lead independently of any electrically conductive path of the substrate. The direct electrical connection between the transducer and the integrated circuit provides a high-speed communication channel that avoids the parasitic and high-inductance limitations generally associated with conventional metallic printed circuit board traces. At the same time, the transducer is compatible with existing printed circuit board technologies and integrate circuit technologies and, therefore, may be readily integrated into existing computer systems.
Abstract:
A capillary action enhanced surface mount pin header includes a first flat substrate provided with a predetermined array of plated-through holes having substantially parallel and each having an internal surface defining a first substantially uniform cross section. Pins are provided each of which defines a longitudinal axis and having one end extending through an associated plated-through hole and another end extending to one side of said first substrate. Each pin has an external surface on at least a portion thereof which is received within an associated plated-through hole which defines a second substantially uniform cross section. In the disclosed embodiment, the pins have square or hexagonal cross sections while the plated-through holes have circular cross sections. The first and second cross sections are dissimilar and configured to provide spaced lines of contact and elongate channels substantially parallel to the axes between the internal and external surfaces and adjacent lines of contact, dimensioned to promote capillary action for molten solder at a channel opening on one side of the first substrate to cause the solder to be drawn through the channels towards the opposite side of the first substrate. A second substantially flat substrate is provided for positioning the solder at points substantially aligned with points on the predetermined array and proximate to at least one channel in at least one plated-through hole prior to melting of the solder.
Abstract:
An electronic module comprises (a) an electrical assembly of electrical components and a cap. The cap surrounds a portion of the electrical assembly of electrical components to form a pocket between a portion of the electrical assembly of electrical components and the cap. The cap has at least one sidewall, each of the at least one sidewalls having an end, one of at least one sidewalls proximately positioned to at least one electrical lead and having at least one notch positioned in the end, the pocket filled with an encapsulant. A process comprises providing a cap and filling the cap with encapsulant, placing an electrical assembly of electrical components in the cap filled with the preselected amount of encapsulant, and allowing the electrical assembly to seat to a proper depth.
Abstract:
In accordance with one aspect of the invention, a thin profile battery apparatus comprises at least two thin profile batteries conductively bonded to one another, with one of the batteries including portion which overhangs the other. In one implementation, the batteries comprise button type batteries. In one implementation, the two thin profile batteries are the same size and shape. In accordance with another aspect, a radio frequency communication device comprises a substrate having conductive paths including an antenna. At least one integrated circuit chip is mounted to the substrate and in electrical connection with a first portion of the substrate conductive paths. At least two thin profile batteries conductively bonded in series with and over one another and a second portion of the substrate conductive paths are included. One of the batteries has a portion which overhangs the other and is in electrical connection with a third portion of the substrate conductive paths. In but another aspect, a method of forming a battery powerable apparatus includes providing at least two thin profile batteries over one another. One of the batteries is conductively connected to a first node location formed on a surface of a substrate. The other of the batteries is provided to overhang the one battery and be electrically connected therewith. The overhang of the other battery is conductively connected with a second node location formed on the surface of the substrate.
Abstract:
A module mounted in relative high density with semiconductor devices is disclosed. The module includes a mounting substrate which has a hole section; a first semiconductor device having bump electrodes which protrude from one principal surface of a package and lead terminals electrically connected to the bump electrodes; a second semiconductor device which also has bump electrodes that can be structurally and electrically coupled with the bump electrodes of the first semiconductor device and where this second semiconductor device is able to be located in the hole section of the mounting substrate, and where the first semiconductor device is able to be supported on the mounting substrate through the lead terminals; and where the bump electrodes of both semiconductor devices are electrically connected to each other.