Abstract:
The electronic device of the invention is such constructed that the antenna part (3) and the RF circuit part (4) can show their respective functions even after the antenna part (3) and the RF circuit part (4) have been separated. Besides a scribe line 6 is formed on a—preferably ceramic—substrate for separating the antenna part (3) from the RF circuit part (4). Both parts may be separated after a change in any environmental condition, such as a change in the circuit configuration of the board on which the device (10) is to be mounted.
Abstract:
The invention provides a structure of Surface Mount Device Light Emitting Diode (SMD LED), which includes a printed circuit board with a metal reflection cup set concavely on the printed circuit board. Besides, at least one LED chip is bonded to the metal reflection cup and electrically connected to the printed circuit board. In addition, an encapsulant is utilized to cover the LED chip and also protrudes from the surface of the printed circuit board for forming a desired shape. The encapsulant of the invention can be directly molded on the printed circuit board and integrally formed in any shape so that the encapsulant will not come off the printed circuit board in any circumstances and that the metal reflection cup can let the light to be fully reflected.
Abstract:
A multilayer capacitor (2) consisting of a capacitor body (1) and an interposer board (20) arranged underneath it, wherein a pair of land patterns are arranged on a front surface of the interposer board (20) for connection with a pair of terminal electrodes of the capacitor body (11) and (12), and a pair of external electrodes are arranged on a back surface of the interposer board (20) for connection with interconnect patterns (34) of a mounting board (33) by solder (35), the pair of land patterns and the pair of external electrodes being arranged on the interposer board (20) so that a direction of a line connecting the pair of land patterns and a direction of a line connecting the pair of external electrodes intersect perpendicularly.
Abstract:
The present invention provides a surface-mounting type electronic circuit unit having no melting of solder attaching an electric part thereto and having high reliability. Therefore, the surface-mounting type electronic circuit unit of the present invention has a side electrode arranged on a side face; a circuit substrate having a wiring pattern arranged on an upper face in a state connected to this side electrode; and an electric part connected to the wiring pattern by soldering. A connecting conductor of the wiring pattern connecting the electric part arranged in a position very near the side electrode is formed in a bent state. Therefore, the connecting conductor between the side electrode and the electric part can be lengthened. Accordingly, solder heat due to the soldering of an electrically conductive pattern and the side electrode and the heat of a flux fall on the electric part side, and an influence on the solder attaching the electric part thereto is small so that this solder is not melted and the surface-mounting type electronic circuit unit of high reliability is obtained.
Abstract:
A frequency controlled oscillator (100) is manufactured using an array (200) of mechanically interconnected oscillator bases (110) having component cavities (130) and wiring patterns therein. A frequency control component (120) serves as a cover for a cavity within the array, and in addition is electrically connected to oscillator components (140, 150) mounted within the cavity to regulate the frequency of electrical oscillation. Both the oscillator bases and finished oscillators may be tested while still in the array, prior to being separated from each other. In a most preferred embodiment, the array of oscillator bases are manufactured from a polymeric sheet material laminated with electrically conductive traces. The polymeric sheet material is selectively punched or formed prior to lamination so that intermediate and upper layers (112, 113) have predetermined sections removed. These removed sections will align with adjacent layers to form the component cavity from intermediate the top and bottom to the top of the finished laminate.
Abstract:
A semiconductor device includes an insulating substrate, a cutout formed in side surfaces of the substrate, a conductive pad formed on the obverse surface of the substrate, an electrode formed on the reverse surface of the substrate, a semiconductor chip mounted on the substrate, and a connector which connects the pad to the electrode. The connector is arranged in the cutout.
Abstract:
The invention relates to a semiconductor component comprising surface metallization and having at least one semiconductor body (3) and a package base body (2) on whose surface conductor path structures (7) are formed by means of surface metallization. A subregion of the conductor path structure (7) constitutes the solder connections of the semiconductor component. The solder connections (1) are combined to form rows, the individual rows of solder connections being arranged at a very small, predetermined spacing from one another.
Abstract:
An interconnect for attaching a module such as a PCB or a multi-chip module to a circuit substrate comprises a member elongated in a longitudinal direction. The member has at least a first elongated side and a second opposed and generally parallel elongated side. The first and second sides extend in the longitudinal direction. Each of the first and second sides have at least one portion formed by a series of depressions in the respective first and second sides. The depressions extend inwardly from a first outer surface of the first side and a second outer surface of the second side. The depressions are metallized to form leads. A circuit assembly is also provided comprising a multi-chip module having a plurality of electronic elements; a circuit substrate supporting thereon a conductive circuit pattern adapted for connection to the multi-chip module and at least one the interconnects for attaching the multi-chip module to the circuit pattern on the circuit substrate. A process for making the interconnect and a process for assembling the circuit assembly is also provided.
Abstract:
In a method of fabricating a multi-layer circuit board assembly, at least two multi-layer circuit board modules are provided. Each of the modules has a lateral edge provided with a plurality of solder pads that are connected electrically with module interconnect circuit traces on a respective one of the modules. The modules are stacked one upon the other, and are bonded together such that the solder pads of one of the modules are connected to registered ones of the solder pads of the other one of the modules, thereby establishing electrical connection among the circuit traces on the modules.
Abstract:
On a piezoelectric substrate 23, there are provided surface acoustic wave devices F1 and F2 in which predetermined circuit patterns are formed, and a package substrate 11 comprising side vias 16 formed in a caved manner in the thickness direction on side surfaces on which the surface acoustic wave devices are mounted. When the side vias 16 are each assumed to have the opening width null and the maximum depth D, a size satisfying null/2