Abstract:
A ceramic substrate secured with a flexible adhesive to a first side of a printed circuit board that belongs to a module and has circuit structures is provided. The ceramic substrate is contacted to the circuit structures with bond connections. The terminal elements are formed by approximately spherical accumulations of solder attached on the backside of the printed circuit board, these solder accumulations being connected to the circuit structures on the first side of the printed circuit board via through-contactings.
Abstract:
A backplane consisting of segmented bus lines on a mother board with loop-through connections to active transceivers mounted on connectors to daughter boards. The transceivers isolate the interconnect to the daughter boards from the bus lines. The loop-through transmission line on the connectors preserves the impedance of the bus lines and allows the interconnect stub to the transceivers to be short, minimizing reflections and enabling high-speed backplane operation. The connectors are removable from the motherboard for repair.
Abstract:
A board adapter for electrically transmitting signals between an electrical card connector and a mother board, includes a plurality of signal traces formed on both faces of the board adapter for electrically connecting signal holes with corresponding conductive pads. The signal holes respectively receive the corresponding contacts of the card connector. The conductive pads electrically engage with corresponding contacts disposed within a receiving slot defined in a card edge connector when the board adapter is inserted therein and stabilizing means ensures proper engagement therebetween. The stabilizing means comprises a cutout defined on a bottom edge of the board adapter and a post formed in the receiving slot of the card edge connector. The engagement between the cutout and the post ensures that the conductive pads of the board adapter are properly aligned with the contacts of the card edge connector.
Abstract:
A multichip module having a carrier substrate, on whose component side an IC component and other electronic components are mounted which are interconnected by way of electrically conductive interconnects. Electrical through-lines are led from the component side to the bottom side of the carrier substrate and being joined to solder contacts arranged on the bottom side for the electrical connection of the multichip module to a card cage. To reduce the density of printed circuit traces on the top side of the multichip module, and to decrease the number of layers necessary in the carrier substrate, a carrier part is arranged between an IC component and the carrier substrate, the carrier part having printed circuit traces and components which are connected to the respective IC component by way of first terminal pads, and are connected to terminals on the carrier substrate by way of second terminal pads.
Abstract:
The invention is directed to an electrical connector comprising a housing having a plurality of contacts mounted therein to provide electrical connection from a daughter board to a circuit board. The contacts provide a linear array of first connection points to the circuit board. The circuit board converts the linear array of first connection points to an area array of second connection points and the area array of second connection points are connected to a mother board by way of a ball grid array. The housing provides an electrical connection between the daughter board and the mother board.
Abstract:
A metallic printed board is formed by laminating an insulation layer on the surface of a metallic sheet as a base, and then electronic parts are mounted on the conductor pattern formed on the surface of the insulation layer. A double-sided printed board mounted thereon electronic parts is placed in parallel. Both the printed boards are supported and fixed monolithically by filling the space between the printed boards with an insulation resin and curing the resin. Furthermore, an insulation resin is laminated on the surface of the printed board in such a manner that the resin may cover the mounted electronic parts, and cured. The heat generated from the electronic parts can be efficiently transmitted to the insulation resins by using a resin having a high thermal conductivity for both of the insulation resins, and the heat is then emitted from the surfaces of the metallic sheet or the insulation resin.
Abstract:
A thin and small computer system that can be used generally for control of equipment or the like, includes a CPU chip, peripheral control chips, and other components mounted in the form of a bare chip, whereby a computer system having a so-called hierarchy architecture can be incorporated in an IC card-like casing. Computer system components are affixedly attached to a double-sided printed wiring board. Electronic components may be attached to the printed wiring board in a bare form and then at least partially sealed with a resin. A system may further include a second printed board which is independent from the first printed board and adhesively attached to a inner surface of the casing and connected to the first printed board by a flexible member. In addition the second circuit board may include structure which enables it to connect to an apparatus for programming an electronic component attached thereto.
Abstract:
A ceramic structural body having electronic components thereon comprises a ceramic package of a ceramic layer having substantially uniform thickness. The package comprises a ceramic element of dish-shaped or box-shaped configuration including a base portion, a sidewall portion extending from the base portion substantially at right angles thereto and a flange portion extending from the free end of the sidewall portion substantially at right angles thereto. The ceramic package is formed by press-forming a ceramic green sheet having substantially uniform thickness. A plurality of metal layers are provided on the surface of desired portions of the ceramic element.