Abstract:
An opto-electronic transceiver having: a transmitting component for converting electrical signals into optical signals; a first circuitry module for the transmitting component; a receiving component for converting optical signals into electrical signals; a second circuitry module for the receiving component; a printed circuitboard with conductor tracks, on which the transmitting component, the receiving component, the first circuitry module and the second circuitry module are arranged; and a transceiver housing including a nonconductive material and has a connector receptacle for receiving and coupling an optical connector. The transmitting component, the first circuitry module, the receiving component and the second circuitry module form at least one subassembly, the subassembly having: an encapsulation composition, in which the components of the subassembly are embedded, and a wiring layer embodied using thin-film technology, the wiring layer providing an electrical contact connection between the subassembly components and to associated contacts of the printed circuit board.
Abstract:
The present invention provides a surface mount composite electronic component which can be made compact. The structure of the surface mount composite electronic component is one in which a circuit element is formed on each of a set of opposing surfaces of an insulating substrate composed of a hexahedron, with electrodes that make up the circuit elements also functioning as external terminals. For example, a pair of first electrodes disposed on both ends of a front surface of the insulating substrate composed of a hexahedron, a pair of second electrodes disposed on a rear surface of the insulating substrate opposite the first electrodes, a first resistor disposed so as to contact both of the first pair of electrodes, and a second resistor disposed so as to contact both of the second electrodes.
Abstract:
A circuit board (10, 10″, 10″′) comprising: a board core (11) having a main core surface (12) and a rear core surface (13); a ceramic capacitor (101, 101′, 101″, 101″′, 101″″, 101″″′, 101″″″) having a main capacitor surface (102) and a rear capacitor surface (103), having a structure in which a first inner electrode layer (141) and a second inner electrode layer (142) are alternately stacked with a ceramic dielectric layer (105) interposed therebetween, and having a plurality of capacitor function units (107, 108) being electrically independent from each other, the ceramic capacitor (101, 101′, 101″, 101″′, 101″″, 101″″′, 101″″″) being buried in the board core (11) in a state where the main core surface (12) and the main capacitor surface (102) are directed in a same direction; and a buildup layer (31) having a structure in which an interlayer insulating layer (33, 35) and a conductor layer (42) are alternately stacked on the main core surface (12) and the main capacitor surface (102) and having a semiconductor integrated circuit device mounting region (23, 51, 52) for mounting a semiconductor integrated circuit device (21, 53, 54) having a plurality of processor cores (24, 25) on a surface (39) of the buildup layer (31), wherein the plurality of capacitor function units (107, 108) are capable of being electrically connected to the plurality of processor cores (24, 25), respectively.
Abstract:
It is an object of the invention to provide an electronic device in which a passive element with an excellent element characteristic is embedded and a method of manufacturing the same. It is another object of the invention to provide an electronic device which makes miniaturization thereof possible and a method of manufacturing the same. A body (10) and a functional block (30) are stuck together by accommodating the functional block (30) in an opening of green ceramic sheets and then sintering those sheets. A temperature for sintering sheets to constitute a dielectric portion (31) of the functional block (30) can be different from that for sintering a raw material of a ceramic material to constitute a dielectric portion (12) of the body (10). Flexibility in selecting a material of the dielectric portion (31) can be extended and a material with a low dielectric constant can be selected for the dielectric portion (31). A dielectric constant of the ceramic material of the functional block (30) can be higher to realize miniaturization of the functional block (30). Since conductor patterns of the functional block (30) can be formed by means of thin film technologies, a three-dimensional appearance is given to edges of the conductor patterns, thereby the functional block (30) with a high Q-value can be embedded in the body (10).
Abstract:
A thin-film metal resistor (44) suitable for a multilayer printed circuit board (12), and a method for its fabrication. The resistor (44) generally has a multilayer construction, with the individual layers (34, 38) of the resistor (44) being self-aligned with each other so that a negative mutual inductance is produced that very nearly cancels out the self-inductance of each resistor layer (34, 38). As a result, the resistor (44) has a very low net parasitic inductance. In addition, the multilayer construction of the resistor (44) reduces the area of the circuit board (12) required to accommodate the resistor (44), and as a result reduces the problem of parasitic interactions with other circuit elements on other layers of the circuit board (12).
Abstract:
A low-EMI circuit which realizes a high mounting density by converting the potential fluctuation of a power supply layer with respect to a ground layer which occurs on switching an IC device etc., into Joule's heat in the substrate without using any parts as a countermeasure against the EMI. Its structure, a circuit board using it, and a method of manufacturing the circuit board are also disclosed. Parallel plate lines in which the Q-value of the stray capacitance between solid layers viewed from the power supply layer and ground layer is equivalently reduced and which are matchedly terminated by forming a structure in which a resistor (resistor layer) and another ground layer are provided in addition to the power supply layer and the ground layer on a multilayered circuit board. A closed shield structure is also disclosed. This invention can remarkably suppress unwanted radiation by absorbing the potential fluctuation (resonance) which occurs in a power supply loop by equivalently reducing the Q-value of the stray capacitance, absorbing the standing wave by the parallel plate lines matchedly terminated and, closing and shielding the parallel plate lines.
Abstract:
A multiple line grid (MLG) for use in a multiple line grid array(MLGA) packaging incorporates therein circuit elements, e.g., metal lines, resistors, capacitors, inductors, transistors or combinations thereof, with a view to reducing a size of a printed circuit board on which it is mounted. The MLGA package includes a semifinished package including a surface with a first metal pattern formed thereon for connecting a number of input/output terminals, a printed circuit board(PCB) including a top surface with a second metal pattern formed thereon according to the first metal pattern; and at least of a MLG which is disposed between the semifinished package and the PCB. The MLG includes a non-conductive body incorporated therein a plurality of circuit elements and multiple number of conductors in the form of a column. Each of the conductors is electrically isolated from each other and is electrically connected to the first and the second metal patterns.
Abstract:
A capacitor network has an uncomplicated construction enabling the capacitance of the capacitor network to be easily increased or decreased. The capacitor network has a plurality of component capacitors formed from two metallic foil layers on opposite sides of a printed circuit board interconnected by lines disposed on both sides of said printed circuit board. The component capacitors of the capacitor network are arranged into at least one series circuit section and at least one parallel circuit section. The series circuit section includes two or more component capacitor, each including at least one component capacitor, connected in series. The parallel circuit section includes two or more parallel-connected component capacitor circuits, each including at least one component capacitor.
Abstract:
A thick-film integrated circuit device comprises an insulating substrate, first and second conductors, formed on the insulating substrate by means of a thick-film forming method and spaced apart from each other, and a resistance-trimming resistor and a function-trimming resistor, both formed on the insulating substrate by means of the thick-film forming method. Both resistors are rectangular strips. The resistance-trimming resistor has two ends overlapping and thus electrically connected to the facing ends of the first and second conductors, respectively. The function-trimming resistor extends perpendicular to the second conductor, and has one end portion which extends at right angles to, overlaps and is therefore electrically coupled to the thin intermediate portion of the second conductor. A laser beam is applied onto the resistance-trimming resistor, while the resistance between those ends of the first and second conductors which face away from each other is being measured, thereby cutting a notch in the function-trimming resistor and thus greatly adjusting this resistance. A laser beam is applied onto the function-trimming resistor, thereby cutting a notch therein, cutting the resistor into two parts, and thus minutely adjusting the resistance between said ends of the first and second conductors.
Abstract:
A piggyback code switch which provides a unique digital code for various types of circuits, for example, garage door openers, load management control receivers, etc., is used with dual-in-line packaging diodes or resistor arrays in such a manner as to enable any combination of resistors or diodes to be pulled to a preselected voltage level and thus provide such circuits with a common starting code. A switch comprising an array of pins extending from a conductive base is placed atop a DIP network. Specific DIP resistors are shorted together by selectively removing the pins of the switch in accordance with a prearranged coding plan. This provides each circuit with a unique digital identification code.